/* Self-hosted variable fonts (SIL Open Font License 1.1), latin and latin-ext. No third-party requests. */
@font-face{font-family:'Fraunces';font-style:normal;font-display:swap;font-weight:100 900;src:url(../fonts/fraunces-latin-ext-full-normal.woff2) format('woff2-variations'),url(../fonts/fraunces-latin-ext-full-normal.woff2) format('woff2');unicode-range:U+0100-02BA,U+02BD-02C5,U+02C7-02CC,U+02CE-02D7,U+02DD-02FF,U+0304,U+0308,U+0329,U+1D00-1DBF,U+1E00-1E9F,U+1EF2-1EFF,U+2020,U+20A0-20AB,U+20AD-20C0,U+2113,U+2C60-2C7F,U+A720-A7FF}
@font-face{font-family:'Fraunces';font-style:normal;font-display:swap;font-weight:100 900;src:url(../fonts/fraunces-latin-full-normal.woff2) format('woff2-variations'),url(../fonts/fraunces-latin-full-normal.woff2) format('woff2');unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}
@font-face{font-family:'Bricolage Grotesque';font-style:normal;font-display:swap;font-weight:200 800;src:url(../fonts/bricolage-grotesque-latin-ext-opsz-normal.woff2) format('woff2-variations'),url(../fonts/bricolage-grotesque-latin-ext-opsz-normal.woff2) format('woff2');unicode-range:U+0100-02BA,U+02BD-02C5,U+02C7-02CC,U+02CE-02D7,U+02DD-02FF,U+0304,U+0308,U+0329,U+1D00-1DBF,U+1E00-1E9F,U+1EF2-1EFF,U+2020,U+20A0-20AB,U+20AD-20C0,U+2113,U+2C60-2C7F,U+A720-A7FF}
@font-face{font-family:'Bricolage Grotesque';font-style:normal;font-display:swap;font-weight:200 800;src:url(../fonts/bricolage-grotesque-latin-opsz-normal.woff2) format('woff2-variations'),url(../fonts/bricolage-grotesque-latin-opsz-normal.woff2) format('woff2');unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}
@font-face{font-family:'Instrument Sans';font-style:normal;font-display:swap;font-weight:400 700;src:url(../fonts/instrument-sans-latin-ext-wght-normal.woff2) format('woff2-variations'),url(../fonts/instrument-sans-latin-ext-wght-normal.woff2) format('woff2');unicode-range:U+0100-02BA,U+02BD-02C5,U+02C7-02CC,U+02CE-02D7,U+02DD-02FF,U+0304,U+0308,U+0329,U+1D00-1DBF,U+1E00-1E9F,U+1EF2-1EFF,U+2020,U+20A0-20AB,U+20AD-20C0,U+2113,U+2C60-2C7F,U+A720-A7FF}
@font-face{font-family:'Instrument Sans';font-style:normal;font-display:swap;font-weight:400 700;src:url(../fonts/instrument-sans-latin-wght-normal.woff2) format('woff2-variations'),url(../fonts/instrument-sans-latin-wght-normal.woff2) format('woff2');unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}
@font-face{font-family:'JetBrains Mono';font-style:normal;font-display:swap;font-weight:100 800;src:url(../fonts/jetbrains-mono-latin-ext-wght-normal.woff2) format('woff2-variations'),url(../fonts/jetbrains-mono-latin-ext-wght-normal.woff2) format('woff2');unicode-range:U+0100-02BA,U+02BD-02C5,U+02C7-02CC,U+02CE-02D7,U+02DD-02FF,U+0304,U+0308,U+0329,U+1D00-1DBF,U+1E00-1E9F,U+1EF2-1EFF,U+2020,U+20A0-20AB,U+20AD-20C0,U+2113,U+2C60-2C7F,U+A720-A7FF}
@font-face{font-family:'JetBrains Mono';font-style:normal;font-display:swap;font-weight:100 800;src:url(../fonts/jetbrains-mono-latin-wght-normal.woff2) format('woff2-variations'),url(../fonts/jetbrains-mono-latin-wght-normal.woff2) format('woff2');unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}

/* Bitopi — generated from tokens.json v2 */
:root,[data-theme="light"]{--ground-0:#F5F7FA;--ground-1:#EDF1F6;--ground-2:#FFFFFF;--plate:#FFFFFFF0;--ink-900:#0E1B2A;--ink-700:#263445;--ink-500:#4C5C6E;--ink-300:#6D7D90;--atmosphere-sky:#E9F1F7;--atmosphere-sand:#F3E9DC;--atmosphere-glow:#FFF4DC;--glass-1-fill:#0E1B2A14;--glass-border-1:#0E1B2A1A;--glass-2-fill:#0E1B2A1F;--glass-border-2:#0E1B2A29;--glass-3-fill:#0E1B2A2E;--glass-border-3:#0E1B2A38;--glass-highlight:#FFFFFFB3;--accent-software-50:#F5F6FF;--accent-software-100:#E9EBFF;--accent-software-200:#D4D7FF;--accent-software-300:#B6BAFF;--accent-software-400:#9697FF;--accent-software-500:#7971FF;--accent-software-600:#614DEC;--accent-software-700:#4D37C7;--accent-software-800:#3A23A0;--accent-software-900:#281575;--software-accent:#614DEC;--software-on-accent:#FFFFFF;--software-accent-hover:#4D37C7;--software-accent-text:#4D37C7;--software-accent-subtle:#F5F6FF;--software-accent-subtle-2:#E9EBFF;--software-glow:#B6BAFF;--accent-accounting-50:#EFFAF3;--accent-accounting-100:#DBF4E6;--accent-accounting-200:#BAE7CE;--accent-accounting-300:#8DD3AE;--accent-accounting-400:#5CBA8D;--accent-accounting-500:#329F70;--accent-accounting-600:#008456;--accent-accounting-700:#006944;--accent-accounting-800:#005033;--accent-accounting-900:#003822;--accounting-accent:#008456;--accounting-on-accent:#FFFFFF;--accounting-accent-hover:#006944;--accounting-accent-text:#005033;--accounting-accent-subtle:#EFFAF3;--accounting-accent-subtle-2:#DBF4E6;--accounting-glow:#8DD3AE;--accent-students-50:#ECFAFC;--accent-students-100:#D6F3F8;--accent-students-200:#AFE6EE;--accent-students-300:#79D1DD;--accent-students-400:#36B8C8;--accent-students-500:#009BAA;--accent-students-600:#007D8A;--accent-students-700:#00646F;--accent-students-800:#004C54;--accent-students-900:#00353B;--students-accent:#007D8A;--students-on-accent:#FFFFFF;--students-accent-hover:#00646F;--students-accent-text:#004C54;--students-accent-subtle:#ECFAFC;--students-accent-subtle-2:#D6F3F8;--students-glow:#79D1DD;--saffron-50:#FDF6EA;--saffron-100:#FBEBD2;--saffron-200:#F4D6A8;--saffron-300:#E5B972;--saffron-400:#D19933;--saffron-500:#B37E00;--saffron-600:#926500;--saffron-700:#755000;--saffron-800:#593C00;--saffron-900:#3F2900;--saffron-light:#B37E00;--saffron-glow:#E5B972;--saffron-text:#755000;--success:#006638;--success-bg:#E1F7E7;--success-border:#8ECFA4;--warning:#795000;--warning-bg:#FCEEDB;--warning-border:#E0B67B;--danger:#A12528;--danger-bg:#FFEBE9;--danger-border:#F2A7A1;--info:#1157A4;--info-bg:#E7F1FF;--info-border:#97C1F7;--focus-ring:#368AEE;--overlay:#0B0F1999;--shadow-glass:0 8px 32px rgba(14,27,42,0.10);--shadow-glass-hover:0 16px 48px rgba(14,27,42,0.14);--shadow-plate:0 1px 2px rgba(14,27,42,0.06)}
[data-theme="dark"]{--ground-0:#0B0F19;--ground-1:#111827;--ground-2:#1F2937;--plate:#111827F0;--ink-900:#F5F2EC;--ink-700:#EDE9E0;--ink-500:#D5D1C8;--ink-300:#BBB7AF;--atmosphere-sky:#0D1424;--atmosphere-sand:#15121A;--atmosphere-glow:#2A2210;--glass-1-fill:#FFFFFF14;--glass-border-1:#FFFFFF1A;--glass-2-fill:#FFFFFF1F;--glass-border-2:#FFFFFF29;--glass-3-fill:#FFFFFF2E;--glass-border-3:#FFFFFF38;--glass-highlight:#FFFFFF59;--accent-software-50:#F5F6FF;--accent-software-100:#E9EBFF;--accent-software-200:#D4D7FF;--accent-software-300:#B6BAFF;--accent-software-400:#9697FF;--accent-software-500:#7971FF;--accent-software-600:#614DEC;--accent-software-700:#4D37C7;--accent-software-800:#3A23A0;--accent-software-900:#281575;--software-accent:#D4D7FF;--software-on-accent:#0B0F19;--software-accent-hover:#E9EBFF;--software-accent-text:#D4D7FF;--software-accent-subtle:#262A52;--software-accent-subtle-2:#303368;--software-glow:#9697FF;--accent-accounting-50:#EFFAF3;--accent-accounting-100:#DBF4E6;--accent-accounting-200:#BAE7CE;--accent-accounting-300:#8DD3AE;--accent-accounting-400:#5CBA8D;--accent-accounting-500:#329F70;--accent-accounting-600:#008456;--accent-accounting-700:#006944;--accent-accounting-800:#005033;--accent-accounting-900:#003822;--accounting-accent:#BAE7CE;--accounting-on-accent:#0B0F19;--accounting-accent-hover:#DBF4E6;--accounting-accent-text:#BAE7CE;--accounting-accent-subtle:#183336;--accounting-accent-subtle-2:#1B413D;--accounting-glow:#5CBA8D;--accent-students-50:#ECFAFC;--accent-students-100:#D6F3F8;--accent-students-200:#AFE6EE;--accent-students-300:#79D1DD;--accent-students-400:#36B8C8;--accent-students-500:#009BAA;--accent-students-600:#007D8A;--accent-students-700:#00646F;--accent-students-800:#004C54;--accent-students-900:#00353B;--students-accent:#AFE6EE;--students-on-accent:#0B0F19;--students-accent-hover:#D6F3F8;--students-accent-text:#AFE6EE;--students-accent-subtle:#0E3241;--students-accent-subtle-2:#0C404F;--students-glow:#36B8C8;--saffron-50:#FDF6EA;--saffron-100:#FBEBD2;--saffron-200:#F4D6A8;--saffron-300:#E5B972;--saffron-400:#D19933;--saffron-500:#B37E00;--saffron-600:#926500;--saffron-700:#755000;--saffron-800:#593C00;--saffron-900:#3F2900;--saffron-light:#D19933;--saffron-glow:#B37E00;--saffron-text:#F4D6A8;--success:#82E6A7;--success-bg:#122D1D;--success-border:#23643F;--warning:#FFC87A;--warning-bg:#33230A;--warning-border:#724D0B;--danger:#FFC3BE;--danger-bg:#3A1D1B;--danger-border:#803F3B;--info:#B3D4FF;--info-bg:#17273C;--info-border:#305686;--focus-ring:#65A8FB;--overlay:#000000A6;--shadow-glass:0 8px 32px rgba(0,0,0,0.28);--shadow-glass-hover:0 16px 48px rgba(0,0,0,0.36);--shadow-plate:0 1px 2px rgba(0,0,0,0.30)}
:root{--space-4:4px;--space-8:8px;--space-12:12px;--space-16:16px;--space-24:24px;--space-32:32px;--space-40:40px;--space-48:48px;--space-64:64px;--space-80:80px;--space-96:96px;--space-128:128px;--radius-sm:8px;--radius-md:16px;--radius-glass:24px;--radius-glass-lg:32px;--radius-pill:999px;--blur-glass-sm:12px;--blur-glass-md:24px;--blur-glass-lg:40px;--blur-glass-xl:64px;--fs-display-1:clamp(44px, 2.5vw + 32px, 112px);--fs-display-sentence:clamp(40px, 3.5vw + 24px, 128px);--fs-display-2:clamp(36px, 1.8vw + 20px, 64px);--fs-h2:clamp(32px, 1.2vw + 20px, 48px);--fs-h3:clamp(22px, 0.5vw + 16px, 28px);--fs-body-lg:clamp(18px, 0.3vw + 16px, 22px);--fs-body:clamp(17px, 0.15vw + 15px, 19px);--fs-data-xl:clamp(32px, 1vw + 24px, 48px);--gutter:clamp(16px, 4.17vw, 120px);--font-display-software:"Bricolage Grotesque", "Instrument Sans", system-ui, sans-serif;--font-display-accounting:"Newsreader", Georgia, "Times New Roman", serif;--font-display-students:"Fraunces", Georgia, "Times New Roman", serif;--font-sans:"Instrument Sans", system-ui, -apple-system, sans-serif;--font-mono:"JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace;--font-bengali:"Anek Bangla", "Noto Sans Bengali", "Instrument Sans", system-ui, sans-serif;--font-display-bengali:"Tiro Bangla", "Noto Serif Bengali", Georgia, serif}
.display-1{font-family:var(--font-display-software);font-size:96px;line-height:0.95;font-weight:800;letter-spacing:-0.02em;font-optical-sizing:auto}
.display-2{font-family:var(--font-display-software);font-size:64px;line-height:1.0;font-weight:700;letter-spacing:-0.015em;font-optical-sizing:auto}
.display-3{font-family:var(--font-display-software);font-size:48px;line-height:1.05;font-weight:700;letter-spacing:-0.01em;font-optical-sizing:auto}
.display-1-accounting{font-family:var(--font-display-accounting);font-size:88px;line-height:0.98;font-weight:500;letter-spacing:-0.01em;font-optical-sizing:auto}
.display-2-accounting{font-family:var(--font-display-accounting);font-size:60px;line-height:1.02;font-weight:500;font-optical-sizing:auto}
.display-3-accounting{font-family:var(--font-display-accounting);font-size:44px;line-height:1.08;font-weight:500;font-optical-sizing:auto}
.display-1-students{font-family:var(--font-display-students);font-size:88px;line-height:0.98;font-weight:600;letter-spacing:-0.01em;font-optical-sizing:auto}
.display-2-students{font-family:var(--font-display-students);font-size:60px;line-height:1.02;font-weight:600;font-optical-sizing:auto}
.display-3-students{font-family:var(--font-display-students);font-size:44px;line-height:1.08;font-weight:600;font-optical-sizing:auto}
.h1{font-family:var(--font-sans);font-size:40px;line-height:1.1;font-weight:700;letter-spacing:-0.01em}
.h2{font-family:var(--font-sans);font-size:32px;line-height:1.15;font-weight:700}
.h3{font-family:var(--font-sans);font-size:24px;line-height:1.2;font-weight:600}
.h4{font-family:var(--font-sans);font-size:20px;line-height:1.3;font-weight:600}
.body-lg{font-family:var(--font-sans);font-size:20px;line-height:1.5;font-weight:400}
.body{font-family:var(--font-sans);font-size:17px;line-height:1.55;font-weight:400}
.body-sm{font-family:var(--font-sans);font-size:15px;line-height:1.5;font-weight:400}
.body-strong{font-family:var(--font-sans);font-size:17px;line-height:1.55;font-weight:600}
.data{font-family:var(--font-mono);font-size:15px;line-height:1.4;font-weight:400;font-variant-numeric:tabular-nums}
.data-lg{font-family:var(--font-mono);font-size:24px;line-height:1.2;font-weight:500;font-variant-numeric:tabular-nums}
.data-xl{font-family:var(--font-mono);font-size:40px;line-height:1.05;font-weight:500;font-variant-numeric:tabular-nums}
.label{font-family:var(--font-sans);font-size:13px;line-height:1.3;font-weight:500}
.label-lg{font-family:var(--font-sans);font-size:15px;line-height:1.3;font-weight:500}
.display-bn{font-family:var(--font-display-bengali);font-size:72px;line-height:1.12;font-weight:400;font-optical-sizing:auto}
.h2-bn{font-family:var(--font-bengali);font-size:32px;line-height:1.3;font-weight:600}
.body-bn{font-family:var(--font-bengali);font-size:18px;line-height:1.7;font-weight:400}
.body-sm-bn{font-family:var(--font-bengali);font-size:16px;line-height:1.65;font-weight:400}
.label-bn{font-family:var(--font-bengali);font-size:14px;line-height:1.4;font-weight:500}

/* Bitopi — bundle.css. The CSS layer of the system, loaded after tokens.css.
   Every colour, size, radius and blur is a token (var(--…)); this file only names the patterns. */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--ground-0);color:var(--ink-900);font-family:var(--font-sans);font-size:17px;line-height:1.55;-webkit-font-smoothing:antialiased}
:where(h1,h2,h3,h4,p,figure,ul,ol,dl,dd){margin:0}
img,svg{display:block;max-width:100%}
a{color:var(--accent-text);text-underline-offset:.16em}
button,input,select,textarea{font:inherit;color:inherit}
:focus-visible{outline:2px solid var(--focus-ring);outline-offset:2px;box-shadow:0 0 0 2px var(--ground-0)}
::selection{background:var(--accent-subtle-2)}
:root{--motion-fast:120ms;--motion-base:200ms;--motion-slow:320ms;--motion-scene:600ms;--ease-standard:cubic-bezier(.2,0,0,1);--ease-enter:cubic-bezier(0,0,.2,1);--ease-exit:cubic-bezier(.4,0,1,1);--ease-spring-soft:cubic-bezier(.34,1.3,.64,1)}

/* ---------- skins: shared skeleton, distinct skin ---------- */
:root,.skin-software{--accent:var(--software-accent);--on-accent:var(--software-on-accent);--accent-hover:var(--software-accent-hover);--accent-text:var(--software-accent-text);--accent-subtle:var(--software-accent-subtle);--accent-subtle-2:var(--software-accent-subtle-2);--glow:var(--software-glow);--light:var(--software-glow);--font-display:var(--font-display-software);--display-weight:700;--display-tracking:-0.02em}
.skin-accounting{--accent:var(--accounting-accent);--on-accent:var(--accounting-on-accent);--accent-hover:var(--accounting-accent-hover);--accent-text:var(--accounting-accent-text);--accent-subtle:var(--accounting-accent-subtle);--accent-subtle-2:var(--accounting-accent-subtle-2);--glow:var(--accounting-glow);--light:var(--accounting-glow);--font-display:var(--font-display-accounting);--display-weight:500;--display-tracking:-0.01em}
.skin-students{--accent:var(--students-accent);--on-accent:var(--students-on-accent);--accent-hover:var(--students-accent-hover);--accent-text:var(--students-accent-text);--accent-subtle:var(--students-accent-subtle);--accent-subtle-2:var(--students-accent-subtle-2);--glow:var(--students-glow);--light:var(--saffron-light);--font-display:var(--font-display-students);--display-weight:600;--display-tracking:-0.01em}

/* ---------- atmosphere & scenes ---------- */
.atmosphere{background:radial-gradient(60% 70% at 72% 18%,var(--glow) 0%,transparent 62%),linear-gradient(160deg,var(--ground-0) 0%,var(--ground-1) 100%)}
.skin-students .atmosphere{background:radial-gradient(50% 60% at 70% 20%,var(--atmosphere-glow) 0%,transparent 60%),linear-gradient(180deg,var(--atmosphere-sky) 0%,var(--atmosphere-sand) 100%)}
.scene{position:relative;padding:var(--space-32);border-radius:var(--radius-glass-lg);overflow:hidden}

/* ---------- glass: three depths, chrome only ---------- */
.glass-1,.glass-2,.glass-3{position:relative;border:1px solid var(--glass-border-1);background:var(--glass-1-fill);border-radius:var(--radius-glass);-webkit-backdrop-filter:blur(var(--blur-glass-lg));backdrop-filter:blur(var(--blur-glass-lg))}
.glass-2{background:var(--glass-2-fill);border-color:var(--glass-border-2);-webkit-backdrop-filter:blur(var(--blur-glass-md));backdrop-filter:blur(var(--blur-glass-md));box-shadow:var(--shadow-glass)}
.glass-3{background:var(--glass-3-fill);border-color:var(--glass-border-3);-webkit-backdrop-filter:blur(var(--blur-glass-sm));backdrop-filter:blur(var(--blur-glass-sm));box-shadow:var(--shadow-glass),inset 0 1px 0 var(--glass-highlight)}
.glass-pad{padding:var(--space-24)}
.glass-heading{color:var(--ink-900);font-size:24px;line-height:1.2;font-weight:600}
@media (max-width:600px){.glass-1{-webkit-backdrop-filter:blur(20px);backdrop-filter:blur(20px)}.glass-2{-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px)}.glass-3{-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px)}}
@media (prefers-reduced-transparency:reduce){.glass-1,.glass-2,.glass-3{-webkit-backdrop-filter:none;backdrop-filter:none;background:var(--ground-2)}}
@supports not ((backdrop-filter:blur(1px)) or (-webkit-backdrop-filter:blur(1px))){.glass-1,.glass-2,.glass-3{background:var(--ground-2)}}
.plate{background:var(--plate);color:var(--ink-900);border-radius:var(--radius-md);padding:var(--space-24);box-shadow:var(--shadow-plate)}
.plate p{color:var(--ink-700)}

/* ---------- type helpers ---------- */
.display{font-family:var(--font-display);font-weight:var(--display-weight);letter-spacing:var(--display-tracking);line-height:1;font-optical-sizing:auto}
.skin-students .display{font-variation-settings:"SOFT" 100}
.muted{color:var(--ink-500)}
.tabular{font-variant-numeric:tabular-nums;font-family:var(--font-mono)}
.stack{display:flex;flex-direction:column;gap:var(--space-16)}
.row{display:flex;flex-wrap:wrap;align-items:center;gap:var(--space-16)}
.grid-3{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:var(--space-24)}
.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}

/* ---------- Button ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:var(--space-8);min-height:44px;padding:0 var(--space-24);border-radius:var(--radius-md);border:1px solid transparent;font-weight:600;line-height:1;cursor:pointer;text-decoration:none;transition:background var(--motion-fast) var(--ease-standard),transform var(--motion-fast) var(--ease-standard)}
.btn:active{transform:translateY(1px)}
.btn-primary{background:var(--accent);color:var(--on-accent)}
.btn-primary:hover{background:var(--accent-hover)}
.btn-secondary{background:transparent;color:var(--accent-text);border-color:var(--accent-text)}
.btn-secondary:hover{background:var(--accent-subtle)}
.btn-ghost{background:transparent;color:var(--ink-900)}
.btn-ghost:hover{background:var(--accent-subtle)}
.btn-destructive{background:var(--danger-bg);color:var(--danger);border-color:var(--danger-border)}
.btn-on-glass{background:var(--glass-3-fill);color:var(--ink-900);border-color:var(--glass-border-3);-webkit-backdrop-filter:blur(var(--blur-glass-sm));backdrop-filter:blur(var(--blur-glass-sm))}
.btn-sm{min-height:36px;padding:0 var(--space-16);font-size:15px}
.btn-lg{min-height:52px;padding:0 var(--space-32);font-size:19px}
.btn[disabled],.btn[aria-disabled="true"]{opacity:.5;cursor:not-allowed}
.btn .spinner{width:16px;height:16px;border-radius:50%;border:2px solid currentColor;border-right-color:transparent;animation:spin 800ms linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}

/* ---------- Fields ---------- */
.field{display:flex;flex-direction:column;gap:var(--space-8)}
.field label,.field .label-text{font-size:15px;font-weight:500;color:var(--ink-900)}
.input,.select,.textarea{min-height:48px;padding:var(--space-12) var(--space-16);border:1px solid var(--ink-300);border-radius:var(--radius-sm);background:var(--ground-2);color:var(--ink-900)}
.textarea{min-height:120px;resize:vertical}
.input::placeholder,.textarea::placeholder{color:var(--ink-300)}
.input:focus,.select:focus,.textarea:focus{border-color:var(--accent-text)}
.field .hint{font-size:15px;color:var(--ink-500)}
.field.is-error .input,.field.is-error .select{border-color:var(--danger)}
.field .error{font-size:15px;color:var(--danger);display:flex;gap:var(--space-8);align-items:center}
.field[data-required] label::after{content:" *";color:var(--danger)}

/* ---------- Choice: checkbox, radio, switch ---------- */
.choice{display:inline-flex;align-items:center;gap:var(--space-12);min-height:44px;cursor:pointer}
.choice input{appearance:none;width:22px;height:22px;margin:0;border:2px solid var(--ink-500);border-radius:6px;background:var(--ground-2);display:grid;place-content:center;flex:none}
.choice input[type=radio]{border-radius:50%}
.choice input:checked{border-color:var(--accent);background:var(--accent)}
.choice input[type=checkbox]:checked::before{content:"";width:12px;height:7px;border:2.5px solid var(--on-accent);border-top:0;border-right:0;transform:translateY(-1px) rotate(-45deg)}
.choice input[type=radio]:checked::before{content:"";width:8px;height:8px;border-radius:50%;background:var(--on-accent)}
.switch input{width:48px;height:28px;border-radius:var(--radius-pill);border:2px solid var(--ink-500);background:var(--ground-2);position:relative}
.switch input::before{content:"";position:absolute;top:3px;left:3px;width:18px;height:18px;border-radius:50%;background:var(--ink-500);transition:transform var(--motion-base) var(--ease-standard)}
.switch input:checked{background:var(--accent);border-color:var(--accent)}
.switch input:checked::before{background:var(--on-accent);transform:translateX(20px)}

/* ---------- Range slider (glass plane controls) ---------- */
.range{display:grid;grid-template-columns:1fr auto;gap:var(--space-8) var(--space-16);align-items:center}
.range label{grid-column:1/-1;font-size:15px;font-weight:500}
.range input{appearance:none;width:100%;height:4px;border-radius:var(--radius-pill);background:var(--glass-border-3);margin:var(--space-12) 0}
.range input::-webkit-slider-thumb{appearance:none;width:24px;height:24px;border-radius:50%;background:var(--accent);border:2px solid var(--on-accent);cursor:pointer}
.range input::-moz-range-thumb{width:24px;height:24px;border-radius:50%;background:var(--accent);border:2px solid var(--on-accent);cursor:pointer}
.range output{font-family:var(--font-mono);font-variant-numeric:tabular-nums;min-width:5ch;text-align:right}

/* ---------- Chips, badges, status ---------- */
.chip{display:inline-flex;align-items:center;gap:var(--space-8);min-height:36px;padding:0 var(--space-12);border-radius:var(--radius-pill);border:1px solid var(--glass-border-3);background:var(--glass-3-fill);color:var(--ink-900);font-size:15px}
.chip.is-selected{background:var(--accent-subtle);border-color:var(--accent-text);color:var(--accent-text)}
.badge{display:inline-flex;align-items:center;gap:var(--space-8);min-height:28px;padding:0 var(--space-12);border-radius:var(--radius-pill);font-size:13px;font-weight:500;border:1px solid}
.badge::before{content:"";width:8px;height:8px;border-radius:50%;background:currentColor}
.badge-neutral{color:var(--ink-700);background:var(--ground-1);border-color:var(--ink-300)}
.badge-success{color:var(--success);background:var(--success-bg);border-color:var(--success-border)}
.badge-warning{color:var(--warning);background:var(--warning-bg);border-color:var(--warning-border)}
.badge-danger{color:var(--danger);background:var(--danger-bg);border-color:var(--danger-border)}
.badge-info{color:var(--info);background:var(--info-bg);border-color:var(--info-border)}
.authority{display:inline-flex;gap:var(--space-8);align-items:center;font-size:13px;color:var(--ink-700);background:var(--ground-1);border:1px solid var(--ink-300);border-radius:var(--radius-pill);padding:var(--space-4) var(--space-12);min-height:28px}

/* ---------- Glass orb (AI presence) ---------- */
.orb{width:64px;height:64px;border-radius:50%;position:relative;border:1px solid var(--glass-border-3);background:radial-gradient(circle at 32% 30%,var(--glow) 0%,var(--accent) 70%);box-shadow:var(--shadow-glass),inset 0 1px 0 var(--glass-highlight);cursor:pointer;display:grid;place-content:center;color:var(--on-accent)}
.orb-ring{position:absolute;inset:-6px;border-radius:50%;border:2px solid var(--glow);opacity:0}
.orb.is-listening .orb-ring{opacity:1}
.orb.is-thinking .orb-ring{opacity:1;border-style:dashed}
.orb-bars{display:flex;gap:3px;align-items:flex-end;height:18px}
.orb-bars i{width:3px;background:var(--on-accent);border-radius:2px;height:6px}
.orb.is-speaking .orb-bars i:nth-child(2){height:16px}.orb.is-speaking .orb-bars i:nth-child(3){height:11px}.orb.is-speaking .orb-bars i:nth-child(4){height:14px}
.orb-label{font-size:13px;color:var(--ink-500);text-align:center;margin-top:var(--space-8)}

/* ---------- Cards ---------- */
.card{display:flex;flex-direction:column;gap:var(--space-16);padding:var(--space-24);transition:transform var(--motion-base) var(--ease-standard),box-shadow var(--motion-base) var(--ease-standard)}
.card.is-interactive:hover,.card.is-interactive:focus-within{transform:translateY(-4px);box-shadow:var(--shadow-glass-hover),inset 0 1px 0 var(--glass-highlight)}
.thumb{aspect-ratio:16/10;border-radius:var(--radius-md);background:var(--plate);display:grid;place-content:center;color:var(--ink-500);font-size:13px;border:1px dashed var(--ink-300)}
.card h3{font-size:24px;line-height:1.2;font-weight:600}
.card .lede{color:var(--ink-700)}
@media (prefers-reduced-motion:reduce){.card.is-interactive:hover{transform:none}.btn:active{transform:none}.switch input::before{transition:none}.btn .spinner{animation:none}.skeleton i{animation:none}}

/* ---------- Depth stack ---------- */
.depth{perspective:1200px;perspective-origin:60% 40%;position:relative;min-height:260px}
.depth .pane{position:absolute;width:62%;padding:var(--space-16) var(--space-24);transform-style:preserve-3d}
.depth .pane.d1{left:0;top:0;transform:translateZ(-120px) rotateY(10deg)}
.depth .pane.d2{left:14%;top:26%;transform:translateZ(-60px) rotateY(6deg)}
.depth .pane.d3{left:28%;top:52%;transform:translateZ(0) rotateY(2deg)}
.depth .pane .label{font-size:13px;color:var(--ink-500)}

/* ---------- Nav & footer ---------- */
.nav{display:flex;align-items:center;gap:var(--space-24);padding:var(--space-12) var(--space-24);border-radius:var(--radius-pill)}
.nav .wordmark{margin-right:auto}
.nav a{color:var(--ink-900);text-decoration:none;font-weight:500;padding:var(--space-8) var(--space-12);border-radius:var(--radius-sm)}
.nav a[aria-current]{background:var(--accent-subtle);color:var(--accent-text)}
.nav a:hover{background:var(--accent-subtle)}
.drawer{width:320px;padding:var(--space-24);display:flex;flex-direction:column;gap:var(--space-8)}
.drawer a{display:block;padding:var(--space-12) var(--space-16);border-radius:var(--radius-sm);color:var(--ink-900);text-decoration:none;font-size:20px;font-weight:500}
.footer{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:var(--space-32);padding:var(--space-48) var(--space-32) var(--space-32)}
.footer h4{font-size:15px;font-weight:600;margin-bottom:var(--space-12)}
.footer ul{list-style:none;padding:0;display:flex;flex-direction:column;gap:var(--space-8)}
.footer a{color:var(--ink-700);text-decoration:none}
.footer .legal{grid-column:1/-1;display:flex;flex-wrap:wrap;gap:var(--space-16);justify-content:space-between;border-top:1px solid var(--glass-border-2);padding-top:var(--space-24);color:var(--ink-500);font-size:15px}

/* ---------- Wordmark ---------- */
.wordmark{font-family:var(--font-display-software);font-weight:800;letter-spacing:-0.03em;font-size:28px;line-height:1;color:var(--ink-900);text-decoration:none;display:inline-flex;align-items:baseline;gap:var(--space-8)}
.wordmark small{font-family:var(--font-sans);font-weight:500;letter-spacing:0;font-size:15px;color:var(--ink-500)}
.wordmark-lg{font-size:64px}

/* ---------- Tabs, stepper, accordion ---------- */
.tabs{display:flex;gap:var(--space-8);border-bottom:1px solid var(--glass-border-3)}
.tabs button{background:none;border:0;padding:var(--space-12) var(--space-16);min-height:44px;color:var(--ink-700);font-weight:500;border-bottom:2px solid transparent;margin-bottom:-1px;cursor:pointer}
.tabs button[aria-selected="true"]{color:var(--accent-text);border-bottom-color:var(--accent-text)}
.stepper{display:flex;gap:var(--space-8);list-style:none;padding:0;counter-reset:step}
.stepper li{flex:1;display:flex;flex-direction:column;gap:var(--space-8);position:relative;counter-increment:step;font-size:15px;color:var(--ink-700)}
.stepper li::before{content:counter(step);width:32px;height:32px;border-radius:50%;display:grid;place-content:center;font-weight:600;border:2px solid var(--ink-300);color:var(--ink-700);background:var(--ground-2)}
.stepper li.is-done::before{background:var(--accent);border-color:var(--accent);color:var(--on-accent);content:"✓"}
.stepper li.is-current{color:var(--ink-900);font-weight:600}
.stepper li.is-current::before{border-color:var(--accent);color:var(--accent-text)}
.stepper li::after{content:"";position:absolute;top:15px;left:40px;right:8px;height:2px;background:var(--ink-300)}
.stepper li.is-done::after{background:var(--accent)}
.stepper li:last-child::after{display:none}
.accordion details{border-top:1px solid var(--glass-border-3)}
.accordion summary{list-style:none;cursor:pointer;min-height:56px;display:flex;align-items:center;justify-content:space-between;font-weight:600;padding:var(--space-12) 0}
.accordion summary::-webkit-details-marker{display:none}
.accordion summary::after{content:"+";font-size:24px;color:var(--accent-text)}
.accordion details[open] summary::after{content:"–"}
.accordion details p{padding:0 0 var(--space-16);color:var(--ink-700)}

/* ---------- Pricing ---------- */
.pricing-trio{display:grid;grid-template-columns:repeat(3,1fr);gap:var(--space-24);perspective:1400px;align-items:end}
.pricing{display:flex;flex-direction:column;gap:var(--space-16);padding:var(--space-24);transform-style:preserve-3d}
.pricing.side-l{transform:rotateY(8deg) translateZ(-40px)}
.pricing.side-r{transform:rotateY(-8deg) translateZ(-40px)}
.pricing.is-recommended{border-color:var(--accent-text)}
.pricing .plan{font-size:15px;font-weight:600;color:var(--ink-700)}
.pricing .price{font-family:var(--font-mono);font-variant-numeric:tabular-nums;font-size:40px;line-height:1.05;font-weight:500}
.pricing .price small{font-family:var(--font-sans);font-size:15px;color:var(--ink-500);font-weight:400}
.pricing ul{list-style:none;padding:0;display:flex;flex-direction:column;gap:var(--space-8);color:var(--ink-700);font-size:15px}
.pricing ul li::before{content:"✓ ";color:var(--accent-text)}
.pricing .why{font-size:15px;color:var(--ink-700);padding:var(--space-12) var(--space-16)}
@media (prefers-reduced-motion:reduce){.pricing.side-l,.pricing.side-r{transform:none}}

/* ---------- Metrics, timeline, progress ---------- */
.metric{display:flex;flex-direction:column;gap:var(--space-4)}
.metric .value{font-family:var(--font-mono);font-variant-numeric:tabular-nums;font-size:40px;line-height:1.05;font-weight:500}
.metric .what{font-size:15px;color:var(--ink-700)}
.metric .source{font-size:13px;color:var(--ink-500)}
.timeline{list-style:none;padding:0;display:flex;flex-direction:column;gap:var(--space-12);perspective:1000px}
.timeline li{padding:var(--space-16) var(--space-24);display:flex;gap:var(--space-16);align-items:flex-start}
.timeline li.is-past{opacity:.7;transform:translateZ(-40px)}
.timeline li.is-current{transform:translateZ(0)}
.timeline li.is-next{opacity:.85;transform:translateZ(-20px)}
.timeline .dot{width:12px;height:12px;border-radius:50%;background:var(--ink-300);margin-top:8px;flex:none}
.timeline li.is-done .dot,.timeline li.is-past .dot{background:var(--accent)}
.timeline li.is-current .dot{background:var(--light);box-shadow:0 0 0 4px var(--accent-subtle)}
.timeline time{font-size:13px;color:var(--ink-500);display:block}
.progress{position:relative;height:4px;background:var(--glass-border-2);border-radius:var(--radius-pill);overflow:hidden}
.progress b{position:absolute;inset:0 auto 0 0;background:var(--accent);border-radius:var(--radius-pill)}
.progress-marks{display:flex;justify-content:space-between;font-size:13px;color:var(--ink-500);margin-top:var(--space-8)}

/* ---------- Feedback ---------- */
.toast{display:flex;align-items:center;gap:var(--space-12);padding:var(--space-12) var(--space-16);max-width:480px}
.toast .msg{flex:1}
.toast.is-success{border-color:var(--success-border)}.toast.is-success svg{color:var(--success)}
.toast.is-danger{border-color:var(--danger-border)}.toast.is-danger svg{color:var(--danger)}
.dialog-scrim{background:var(--overlay);padding:var(--space-48);display:grid;place-items:center;border-radius:var(--radius-glass-lg)}
.dialog{width:min(100%,520px);padding:var(--space-24);display:flex;flex-direction:column;gap:var(--space-16)}
.dialog h2{font-size:24px;line-height:1.2;font-weight:600}
.dialog .actions{display:flex;gap:var(--space-12);justify-content:flex-end}
.skeleton{display:flex;flex-direction:column;gap:var(--space-12)}
.skeleton i{display:block;height:14px;border-radius:var(--radius-sm);background:linear-gradient(90deg,var(--ground-1),var(--ground-2),var(--ground-1));background-size:200% 100%;animation:shimmer 1.6s linear infinite}
.skeleton i.block{height:120px;border-radius:var(--radius-md)}
@keyframes shimmer{to{background-position:-200% 0}}
.empty{display:flex;flex-direction:column;align-items:center;text-align:center;gap:var(--space-12);padding:var(--space-48) var(--space-24)}
.empty h3{font-size:24px;font-weight:600;line-height:1.2}
.empty p{color:var(--ink-700);max-width:36ch}
.cookie{display:flex;flex-wrap:wrap;gap:var(--space-16);align-items:center;padding:var(--space-16) var(--space-24);max-width:720px}
.cookie p{flex:1 1 320px;font-size:15px;color:var(--ink-700)}
.cookie .actions{display:flex;gap:var(--space-8)}

/* ---------- Chat surface ---------- */
.chat{display:flex;flex-direction:column;gap:var(--space-12);width:min(100%,480px);padding:var(--space-16)}
.chat .disclosure{font-size:13px;color:var(--ink-500);display:flex;gap:var(--space-8);align-items:center}
.bubble{max-width:88%;padding:var(--space-12) var(--space-16);border-radius:var(--radius-md)}
.bubble.ai{align-self:flex-start;background:var(--plate);color:var(--ink-900);border-bottom-left-radius:4px}
.bubble.ai p{color:var(--ink-900)}
.bubble.user{align-self:flex-end;background:var(--accent);color:var(--on-accent);border-bottom-right-radius:4px}
.bubble .provenance{display:block;font-size:13px;color:var(--ink-500);margin-top:var(--space-8)}
.bubble.is-uncertain{border:1px solid var(--warning-border)}
.bubble.is-uncertain .flag{display:flex;gap:var(--space-8);align-items:center;color:var(--warning);font-size:15px;font-weight:600;margin-bottom:var(--space-4)}
.chat .composer{display:flex;gap:var(--space-8);align-items:center}
.chat .composer .input{flex:1}
.chat .handoff{display:flex;gap:var(--space-8);flex-wrap:wrap}

/* ---------- Calculator shell ---------- */
.calc{display:grid;grid-template-columns:1.1fr 1fr;gap:var(--space-24);padding:var(--space-24)}
.calc .result{display:flex;flex-direction:column;gap:var(--space-8)}
.calc .result .value{font-family:var(--font-mono);font-variant-numeric:tabular-nums;font-size:40px;line-height:1.05;font-weight:500}
.calc .result .formula{font-family:var(--font-mono);font-size:13px;color:var(--ink-500)}
.calc .result .note{font-size:13px;color:var(--ink-500)}
@media (max-width:600px){.calc,.footer,.pricing-trio,.grid-3{grid-template-columns:1fr}.pricing.side-l,.pricing.side-r{transform:none}}

/* ---------- Search bar with AI suggestions ---------- */
.search{position:relative;width:min(100%,560px)}
.search .input{width:100%;padding-left:48px;border-radius:var(--radius-pill);min-height:52px}
.search > svg{position:absolute;left:16px;top:50%;transform:translateY(-50%);color:var(--ink-500)}
.search .suggest{margin-top:var(--space-8);padding:var(--space-8);display:flex;flex-direction:column}
.search .suggest .head{font-size:13px;color:var(--ink-500);padding:var(--space-8) var(--space-12)}
.search .suggest button{text-align:left;background:none;border:0;padding:var(--space-12);border-radius:var(--radius-sm);min-height:44px;cursor:pointer;color:var(--ink-900)}
.search .suggest button:hover,.search .suggest button[aria-selected="true"]{background:var(--accent-subtle)}
.search .suggest button small{display:block;color:var(--ink-500);font-size:13px}

/* ---------- Language switcher & logo cloud ---------- */
.lang{display:inline-flex;align-items:center;gap:var(--space-8);min-height:44px;padding:0 var(--space-12);border-radius:var(--radius-pill);border:1px solid var(--glass-border-3);background:var(--glass-3-fill)}
.lang select{border:0;background:transparent;min-height:40px;cursor:pointer}
.logos{display:grid;grid-template-columns:repeat(5,1fr);gap:var(--space-16)}
.logos div{height:56px;border:1px dashed var(--ink-300);border-radius:var(--radius-sm);display:grid;place-content:center;color:var(--ink-500);font-size:13px}

/* ---- Phase 1 extension (students build): fluid sizes, stage and gutter ---- */
.fs-display-1{font-size:var(--fs-display-1)}.fs-display-sentence{font-size:var(--fs-display-sentence)}.fs-display-2{font-size:var(--fs-display-2)}.fs-h2{font-size:var(--fs-h2)}.fs-h3{font-size:var(--fs-h3)}.fs-body-lg{font-size:var(--fs-body-lg)}.fs-body{font-size:var(--fs-body)}.fs-data-xl{font-size:var(--fs-data-xl)}
.stage{width:100%;max-width:1680px;margin-inline:auto}
.gutter{padding-inline:var(--gutter)}
/* ---- Bengali: set lang="bn" on the element or the page ---- */
.font-bengali,:lang(bn){font-family:var(--font-bengali);letter-spacing:0}
:lang(bn) p,:lang(bn) li,p:lang(bn){line-height:1.7}
:lang(bn) .display,.display:lang(bn){font-family:var(--font-display-bengali);font-weight:400;font-variation-settings:normal;line-height:1.12}
:lang(bn) .h1,:lang(bn) .h2,:lang(bn) .h3,:lang(bn) .h4,.h2:lang(bn){line-height:1.3}
:lang(bn) .btn,:lang(bn) .chip,:lang(bn) .label,.btn:lang(bn){font-family:var(--font-bengali);font-size:16px}
/* ---- FilterTray ---- */
.filter-tray{display:flex;flex-direction:column;gap:var(--space-24);padding:var(--space-24);min-width:0}
.filter-tray .ft-head{display:flex;justify-content:space-between;align-items:center;gap:var(--space-12)}
.filter-tray .ft-title{font-size:15px;font-weight:600;color:var(--ink-900)}
.filter-tray fieldset{border:0;margin:0;padding:0;min-width:0;display:flex;flex-direction:column;gap:var(--space-8)}
.filter-tray legend,.filter-tray .ft-label{font-size:13px;font-weight:500;color:var(--ink-500);padding:0;margin-bottom:var(--space-4)}
.filter-tray .choice{min-height:40px;font-size:15px;justify-content:space-between}
.filter-tray .count{font-family:var(--font-mono);font-variant-numeric:tabular-nums;font-size:13px;color:var(--ink-500);margin-left:auto}
.filter-tray .chips{display:flex;flex-wrap:wrap;gap:var(--space-8)}
.filter-tray .more{font-size:15px}
.filter-tray .ft-foot{display:flex;gap:var(--space-8);align-items:center;flex-wrap:wrap}
.filter-tray.is-sheet{position:fixed;left:0;right:0;bottom:0;max-height:85vh;overflow:auto;border-radius:var(--radius-glass) var(--radius-glass) 0 0;z-index:6;background:var(--plate)}
.filter-tray.is-sheet .ft-foot{position:sticky;bottom:0;margin:0 calc(-1 * var(--space-24)) calc(-1 * var(--space-24));padding:var(--space-12) var(--space-24);background:var(--plate);box-shadow:var(--shadow-glass)}
/* ---- CompareTray ---- */
.compare-tray{position:sticky;bottom:var(--space-16);z-index:4;display:flex;flex-wrap:wrap;gap:var(--space-12);align-items:center;padding:var(--space-12) var(--space-16)}
.compare-tray .ct-label{font-weight:600;color:var(--ink-900);font-size:15px}
.compare-tray .picked{display:inline-flex;align-items:center;gap:var(--space-8);padding:var(--space-4) var(--space-8) var(--space-4) var(--space-12);min-height:36px;border-radius:var(--radius-pill);background:var(--plate);color:var(--ink-900);font-size:15px;box-shadow:var(--shadow-plate)}
.compare-tray .picked button{border:0;background:none;color:var(--ink-500);cursor:pointer;min-height:28px;min-width:28px;padding:0;border-radius:var(--radius-pill);font:inherit}
.compare-tray .picked button:hover{color:var(--danger);background:var(--danger-bg)}
.compare-tray .slot{display:inline-flex;align-items:center;min-height:36px;padding:0 var(--space-12);border:1px dashed var(--glass-border-3);border-radius:var(--radius-pill);color:var(--ink-500);font-size:15px}
.compare-tray .ct-actions{margin-left:auto;display:flex;gap:var(--space-8)}
@media (max-width:600px){.compare-tray{bottom:0;border-radius:var(--radius-glass) var(--radius-glass) 0 0}.compare-tray .ct-actions{margin-left:0;width:100%}.compare-tray .ct-actions .btn{flex:1}}
/* ---- DataTable ---- */
.data-table-wrap{overflow:auto;border-radius:var(--radius-md);background:var(--ground-2);box-shadow:var(--shadow-plate);max-width:100%}
.data-table{width:100%;border-collapse:separate;border-spacing:0;font-size:15px;color:var(--ink-900)}
.data-table caption{text-align:left;font-weight:600;padding:var(--space-16) var(--space-16) var(--space-8);color:var(--ink-900)}
.data-table th,.data-table td{text-align:left;vertical-align:top;padding:var(--space-12) var(--space-16);border-bottom:1px solid var(--glass-border-2)}
.data-table thead th{position:sticky;top:0;background:var(--ground-2);font-size:13px;font-weight:600;color:var(--ink-700);white-space:nowrap;z-index:1}
.data-table th[aria-sort] button{all:unset;cursor:pointer;display:inline-flex;gap:var(--space-4);align-items:center;min-height:32px;color:inherit}
.data-table th[aria-sort] button:focus-visible{outline:2px solid var(--focus-ring);outline-offset:2px}
.data-table th[aria-sort="ascending"] button::after{content:"\2191";font-family:var(--font-mono)}
.data-table th[aria-sort="descending"] button::after{content:"\2193";font-family:var(--font-mono)}
.data-table .num{text-align:right;font-family:var(--font-mono);font-variant-numeric:tabular-nums}
.data-table tbody th{font-weight:600;color:var(--ink-900)}
.data-table tbody tr:hover>td,.data-table tbody tr:hover>th{background:var(--ground-1)}
.data-table tbody tr.is-selected>td,.data-table tbody tr.is-selected>th{background:var(--accent-subtle)}
.data-table .src{display:block;font-size:13px;color:var(--ink-500);font-family:var(--font-sans);text-align:left}
.data-table.is-compare thead th{font-size:17px;color:var(--ink-900);white-space:normal}
.data-table.is-compare tbody th{width:180px;color:var(--ink-700);font-weight:500}
.data-table .empty-cell{color:var(--ink-300)}

/* Bitopi sites — shared chrome added on top of the design system.
   Load order: fonts.css, tokens.css, bundle.css, site.css. Tokens only; no new colours. */

html{scroll-behavior:smooth;scroll-padding-top:24px}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}}
body{min-height:100vh}
a:hover{color:var(--ink-900)}
[hidden]{display:none!important}

/* Skip link: hidden until focused */
.skip{position:absolute;left:16px;top:-200px;z-index:100;background:var(--plate);color:var(--ink-900);padding:12px 16px;border-radius:var(--radius-sm);box-shadow:var(--shadow-glass);font-weight:600}
.skip:focus{top:16px}

.skin-students{--page-glow:var(--saffron-glow)}
.skin-software{--page-glow:var(--software-glow)}

/* Page shell */
.page{display:flex;flex-direction:column;min-height:100vh;font-family:var(--font-sans);color:var(--ink-900);background:var(--ground-0)}
.page > .atmosphere{flex:1 0 auto;display:flex;flex-direction:column}
main{display:flex;flex-direction:column;flex:1 0 auto}

/* ---------- Nav additions: dropdown, phone drawer, hover fixes ---------- */
.site-header{position:relative;z-index:20;padding-top:24px;display:flex;flex-direction:column}
.nav{position:relative;flex-wrap:wrap;min-width:0}
.nav .wordmark{gap:12px;flex:none}
.nav .wordmark img{flex:none}
.nav .wordmark img{height:40px;width:auto}
.nav .wordmark .muted{font-weight:400}
.nav .nav-btn{background:none;border:0;padding:8px 12px;border-radius:var(--radius-sm);font-weight:500;color:var(--ink-900);cursor:pointer;display:inline-flex;align-items:center;gap:6px;min-height:40px}
.nav .nav-btn:hover,.nav .nav-btn[aria-expanded="true"],.nav .nav-btn[aria-current]{background:var(--accent-subtle);color:var(--accent-text)}
.nav .nav-btn svg{transition:transform var(--motion-fast) var(--ease-standard)}
.nav .nav-btn[aria-expanded="true"] svg{transform:rotate(180deg)}
.nav .nav-actions{display:flex;gap:8px;align-items:center}
.nav a.btn-primary{color:var(--on-accent)}
.nav a.btn-primary:hover{background:var(--accent-hover);color:var(--on-accent)}
.nav a.btn-on-glass,.nav button.btn-on-glass{color:var(--ink-900)}
.nav a.chip.is-selected:hover{background:var(--accent-subtle-2);color:var(--accent-text)}
.nav-dd{position:relative}
.dd{position:absolute;left:0;top:calc(100% + 8px);min-width:260px;padding:8px;display:flex;flex-direction:column;gap:2px;z-index:30;border-radius:var(--radius-md)}
.dd a{display:flex!important;flex-direction:column;align-items:flex-start;min-height:44px;justify-content:center}
.dd a small{font-size:13px;color:var(--ink-500);font-weight:400}
.menu-btn{display:none!important}
.drawer.site-drawer{width:auto;margin-top:8px;border-radius:var(--radius-glass)}
.drawer.site-drawer a{min-height:44px;display:flex;align-items:center}
.drawer.site-drawer .drawer-label{font-size:13px;color:var(--ink-500);padding:12px 16px 4px}
.drawer.site-drawer .btn{margin-top:8px;font-size:17px}
@media (max-width:600px){
  .nav{gap:8px;padding:8px 12px;flex-wrap:nowrap}
  .nav .wordmark{font-size:22px;gap:8px}
  .nav .wordmark img{height:32px}
  .nav .nav-actions{margin-left:auto}
  .nav .link{display:none!important}
  .menu-btn{display:inline-flex!important}
  .nav .nav-actions .btn{white-space:nowrap}
}
@media (min-width:601px){.drawer.site-drawer{display:none!important}}

/* ---------- Orb help panel (the counsellor / Ask Bitopi presence) ---------- */
.orb-dock{display:flex;align-items:center;gap:12px}
.orb-panel{position:fixed;right:24px;bottom:24px;z-index:40;width:min(calc(100vw - 32px),400px)}
.orb-panel .chat{width:100%}
.orb-panel .panel-head{display:flex;justify-content:space-between;align-items:center;gap:12px}
.orb-panel h2{font-size:17px;font-weight:600;color:var(--ink-900)}
@media (max-width:600px){.orb-panel{right:16px;bottom:16px}}

/* ---------- Notices ---------- */
.notice{display:flex;gap:12px;align-items:flex-start;padding:14px 16px;border-radius:var(--radius-sm);border:1px solid var(--info-border);background:var(--info-bg);color:var(--ink-900);font-size:15px}
.notice b{color:var(--info)}
.notice.is-warning{border-color:var(--warning-border);background:var(--warning-bg)}
.notice.is-warning b{color:var(--warning)}
.notice.is-danger{border-color:var(--danger-border);background:var(--danger-bg)}
.notice.is-danger b{color:var(--danger)}
.notice.is-success{border-color:var(--success-border);background:var(--success-bg)}
.notice.is-success b{color:var(--success)}

/* ---------- Simple content pages (trust pages, coming soon) ---------- */
.simple{padding-top:72px;padding-bottom:120px}
.simple .stage{display:grid;grid-template-columns:minmax(0,1fr);gap:32px;max-width:960px}
.simple h1{font-size:var(--fs-display-2);line-height:1.02;color:var(--ink-900);text-wrap:balance}
.prose{display:flex;flex-direction:column;gap:16px}
.prose h2{font-size:24px;line-height:1.2;font-weight:600;color:var(--ink-900);margin-top:16px}
.prose p,.prose li{color:var(--ink-700);max-width:70ch}
.prose ul{padding-left:20px;display:flex;flex-direction:column;gap:6px}
.placeholder-note{font-size:13px;color:var(--ink-500)}

/* ---------- Contact form ---------- */
.form-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(260px,100%),1fr));gap:16px 20px}
.field .input,.field .select,.field .textarea{width:100%}
.hp{position:absolute!important;left:-10000px!important;width:1px;height:1px;overflow:hidden}
.form-actions{display:flex;flex-wrap:wrap;gap:12px;align-items:center;justify-content:space-between;border-top:1px solid var(--glass-border-2);padding-top:24px}

/* ---------- Footer additions ---------- */
.footer{grid-template-columns:repeat(auto-fit,minmax(min(200px,100%),1fr));padding-top:48px;padding-bottom:32px;border-top:1px solid var(--glass-border-1)}
.footer h2{font-size:15px;font-weight:600;margin:0 0 12px;color:var(--ink-900)}
.footer .lockup img{width:220px;height:auto}
.footer a:hover{color:var(--ink-900);text-decoration:underline}
@media (max-width:600px){.footer .legal{flex-direction:column}}

/* Thumb placeholders read as placeholders, not broken images */
.thumb{text-align:center;padding:8px}

/* Outcome notices for visitors without JavaScript (send.php returns to #sent or #form-error) */
.target-notice{display:none}
.target-notice:target{display:flex}

a.chip{text-decoration:none}
a.chip:hover{border-color:var(--accent-text);color:var(--ink-900)}
.chat .composer .input{min-width:0}
@media (max-width:480px){.skin-students .nav .wordmark span{display:none}}
.page{overflow-x:clip}
.field[data-required] > .label-text::after{content:" *";color:var(--danger)}
#l-dob::after{content:none!important}


/* ---------- software.bitopi.co.uk — dark skin, iris light. Tokens only; no new colours. ---------- */

.sw-hero{position:relative;overflow:hidden;min-height:900px;margin-top:-84px;padding:176px clamp(16px,5.56vw,80px) 64px;display:grid;grid-template-columns:repeat(auto-fit,minmax(min(520px,100%),1fr));gap:32px;align-items:center}
.sw-hero h1{margin:0;display:flex;flex-direction:column;gap:16px}
.sw-hero .lead{font-family:var(--font-display);font-weight:200;font-size:32px;line-height:1.15;color:var(--ink-700);font-optical-sizing:auto}
.sw-glow{position:absolute;border-radius:50%;pointer-events:none;filter:blur(60px)}

/* The product universe: seven glass tiles that dock into a shelf as the page scrolls (--dock 0 to 1). */
.uni{position:relative;min-height:720px;perspective:1400px;perspective-origin:50% 35%;--dock:0}
.uni .beam{position:absolute;left:50%;top:0;height:70%;transform-origin:50% 0;pointer-events:none}
.uni-tile{position:absolute;width:30%;min-width:150px;padding:16px 18px;display:flex;flex-direction:column;gap:6px;
  left:calc((var(--sx) * (1 - var(--dock)) + var(--dx) * var(--dock)) * 1%);
  top:calc((var(--sy) * (1 - var(--dock)) + var(--dy) * var(--dock)) * 1%);
  transform:translateZ(calc(var(--sz) * (1 - var(--dock)) * 1px)) rotateY(calc(var(--sr) * (1 - var(--dock)) * 1deg)) rotateX(calc(8 * (1 - var(--dock)) * 1deg));
  will-change:left,top,transform}
.uni-tile .glyph{width:32px;height:32px;color:var(--accent-text)}
.uni-tile b{font-size:17px;font-weight:600;color:var(--ink-900)}
.uni-tile span{font-size:13px;color:var(--ink-500);line-height:1.35}
.uni-shelf{position:absolute;left:0;right:0;top:62%;height:2px;background:linear-gradient(90deg,transparent,var(--software-glow),transparent);opacity:calc(.15 + .6 * var(--dock));border-radius:999px}
/* Phone: the shelf right below the hero carries the products, so the scene steps aside */
.cta-short{display:none}
@media (max-width:600px){
  .skin-software .nav .cta-long{display:none}
  .skin-software .nav .cta-short{display:inline}
}
@media (max-width:480px){.skin-software .nav .wordmark .muted{display:none}}
@media (max-width:400px){.skin-software .nav .wordmark span{display:none}}
@media (max-width:760px){
  .uni{display:none!important}
  .sw-hero{min-height:0;padding-top:150px}
  .uni{min-height:0;display:grid;grid-template-columns:1fr 1fr;gap:12px;perspective:none}
  .uni .beam,.uni-shelf{display:none}
  .uni-tile{position:relative;left:auto!important;top:auto!important;transform:none!important;width:auto;min-width:0}
  .sw-hero .lead{font-size:24px}
  .sw-hero .display-1{font-size:52px}
}

/* Sections */
.sw-section{padding:96px clamp(16px,5.56vw,80px);position:relative}
.sw-section > .stage{display:flex;flex-direction:column;gap:32px}
.sw-head{display:flex;flex-direction:column;gap:12px;max-width:62ch}
.sw-head p{color:var(--ink-700);font-size:17px;line-height:1.55}
.alt{background:var(--ground-1)}
.crumbs{display:flex;gap:8px;align-items:center;font-size:15px;color:var(--ink-500);flex-wrap:wrap}
.crumbs a{color:var(--ink-700)}
@media (max-width:600px){.sw-section{padding-top:56px;padding-bottom:56px}}

/* Product cards (the shelf) */
.shelf{display:grid;grid-template-columns:repeat(auto-fill,minmax(min(300px,100%),1fr));gap:20px}
.p-card{text-decoration:none;color:inherit;display:flex;flex-direction:column;gap:14px;padding:24px;height:100%}
.p-card:hover{color:inherit}
.p-card .glyph{width:40px;height:40px;color:var(--accent-text)}
.p-card h3{font-size:24px;line-height:1.2;font-weight:600;color:var(--ink-900)}
.p-card p{color:var(--ink-700)}
.p-card .badges{margin-top:auto}
.badges{display:flex;flex-wrap:wrap;gap:8px}
.p-card .more{color:var(--accent-text);font-weight:600;font-size:15px}

/* Shared facts list */
.facts{margin:0;display:flex;flex-direction:column}
.facts > div{display:flex;flex-wrap:wrap;gap:8px 24px;padding:24px 0;border-top:1px solid var(--glass-border-2)}
.facts > div:last-child{border-bottom:1px solid var(--glass-border-2)}
.facts dt{flex:1 1 200px;color:var(--ink-900)}
.facts dd{margin:0;flex:2 1 320px;color:var(--ink-700)}

/* Fit finder */
.finder{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(440px,100%),1fr));gap:32px;padding:40px}
.q{border:0;margin:0;padding:0;display:flex;flex-direction:column;gap:12px}
.q legend{font-weight:600;color:var(--ink-900);margin-bottom:12px;padding:0}
.q .opts{display:flex;flex-wrap:wrap;gap:8px}
.chip-radio{position:relative}
.chip-radio input{position:absolute;opacity:0;width:1px;height:1px}
.chip-radio span{display:inline-flex;align-items:center;min-height:44px;padding:0 16px;border-radius:var(--radius-pill);border:1px solid var(--glass-border-3);background:var(--glass-3-fill);color:var(--ink-900);font-size:15px;cursor:pointer}
.chip-radio input:checked + span{background:var(--accent-subtle);border-color:var(--accent-text);color:var(--accent-text)}
.chip-radio input:focus-visible + span{outline:2px solid var(--focus-ring);outline-offset:2px}
.finder-out{display:flex;flex-direction:column;gap:16px}
.finder-out .plate{display:flex;flex-direction:column;gap:8px}
.finder-note{font-size:13px;color:var(--ink-500)}

/* Products page: filters + results */
.catalogue{display:grid;grid-template-columns:300px minmax(0,1fr);gap:32px;align-items:start}
.rail{position:sticky;top:24px;padding:24px;display:flex;flex-direction:column;gap:24px}
.rail h2{font-size:15px;font-weight:600;color:var(--ink-900)}
.rail .group{display:flex;flex-direction:column;gap:10px}
.rail .opts{display:flex;flex-wrap:wrap;gap:8px}
button.chip{cursor:pointer;font-family:inherit}
button.chip[aria-pressed="true"]{background:var(--accent-subtle);border-color:var(--accent-text);color:var(--accent-text)}
.results-head{display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px;align-items:center;margin-bottom:16px}
.results-head p{color:var(--ink-700)}
.search{display:flex;flex-direction:column;gap:8px}
@media (max-width:900px){.catalogue{grid-template-columns:1fr}.rail{position:relative;top:auto}}

/* Product page */
.p-hero{position:relative;overflow:hidden;margin-top:-84px;padding:168px clamp(16px,5.56vw,80px) 72px;display:grid;grid-template-columns:repeat(auto-fit,minmax(min(480px,100%),1fr));gap:48px;align-items:center}
.p-hero h1{font-size:var(--fs-display-1);line-height:1;color:var(--ink-900)}
.p-hero .tagline{font-family:var(--font-display);font-weight:200;font-size:30px;line-height:1.2;color:var(--ink-700)}
.p-hero .cta{display:flex;flex-wrap:wrap;gap:12px}
@media (max-width:600px){.p-hero{padding-top:140px}.p-hero .tagline{font-size:24px}}

/* An abstract render of the product's window */
.win{position:relative;padding:0;overflow:hidden;min-height:340px}
.win-bar{display:flex;align-items:center;gap:8px;padding:12px 16px;border-bottom:1px solid var(--glass-border-2)}
.win-bar i{width:10px;height:10px;border-radius:50%;background:var(--glass-border-3)}
.win-bar span{margin-left:8px;font-size:13px;color:var(--ink-500)}
.win-body{display:grid;grid-template-columns:120px 1fr;min-height:300px}
.win-side{border-right:1px solid var(--glass-border-2);padding:16px;display:flex;flex-direction:column;gap:12px}
.win-side i{display:block;height:8px;border-radius:999px;background:var(--glass-border-3)}
.win-side i:first-child{background:var(--accent-text);opacity:.7}
.win-main{padding:20px;display:flex;flex-direction:column;gap:10px}
.win-row{display:grid;grid-template-columns:1fr 64px 20px;gap:12px;align-items:center}
.win-row i{display:block;height:8px;border-radius:999px;background:var(--glass-border-3)}
.win-row i.n{background:var(--ink-300);opacity:.6}
.win-row svg{color:var(--accent-text)}
.win-glyph{position:absolute;right:-24px;bottom:-24px;width:200px;height:200px;color:var(--software-glow);opacity:.18;pointer-events:none}
@media (max-width:600px){.win-body{grid-template-columns:72px 1fr}}

.features{display:grid;grid-template-columns:repeat(auto-fill,minmax(min(320px,100%),1fr));gap:16px}
.features .plate{display:flex;flex-direction:column;gap:8px}
.features h3{font-size:19px;line-height:1.3;font-weight:600;color:var(--ink-900)}
.proof{font-size:15px;color:var(--ink-500)}

/* Sandboxes */
.sandbox{padding:24px;display:flex;flex-direction:column;gap:16px}
.sandbox .sample{display:inline-flex;align-items:center;gap:8px;font-size:13px;color:var(--ink-500)}
.sandbox .plate{padding:16px;overflow-x:auto}
.sb-controls{display:flex;flex-wrap:wrap;gap:8px;align-items:center}
.sb-table{width:100%;border-collapse:collapse;font-size:15px;min-width:520px}
.sb-table th{text-align:left;font-weight:600;color:var(--ink-700);font-size:13px;padding:8px 10px;border-bottom:1px solid var(--glass-border-3)}
.sb-table td{padding:10px;border-bottom:1px solid var(--glass-border-2);color:var(--ink-900);vertical-align:middle}
.sb-table th.num{text-align:right}
.sb-table td.num{text-align:right;font-family:var(--font-mono);font-variant-numeric:tabular-nums}
.sb-table tr.is-off td{color:var(--ink-500)}
.sb-table tr.is-flag td{background:var(--danger-bg)}
.sb-table tr.is-match td{background:var(--accent-subtle)}
.sb-table input.input{min-height:36px;padding:4px 8px;width:100%;font-family:var(--font-mono);text-align:right}
.sb-table input.input.text{text-align:left;font-family:var(--font-sans)}
.sb-status{font-size:15px;color:var(--ink-700)}
.sb-status b{color:var(--ink-900)}
.mark{display:inline-flex;align-items:center;gap:6px;font-size:13px;font-weight:500}
.mark.ok{color:var(--success)}
.mark.bad{color:var(--danger)}
.mark.warn{color:var(--warning)}
.mark.info{color:var(--info)}
.totals{display:grid;grid-template-columns:1fr auto;gap:6px 24px;max-width:340px;margin-left:auto;font-size:15px}
.totals dt{color:var(--ink-700)}
.totals dd{margin:0;text-align:right;font-family:var(--font-mono);font-variant-numeric:tabular-nums;color:var(--ink-900)}
.totals .grand{font-weight:600;font-size:17px;border-top:1px solid var(--glass-border-3);padding-top:6px}

/* Time calculator */
.calc{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(400px,100%),1fr));gap:32px;padding:32px}
.calc-in{display:flex;flex-direction:column;gap:12px}
.calc-out{display:flex;flex-direction:column;gap:16px}
.calc-out .plate{display:flex;flex-direction:column;gap:6px}
.calc-out .big{font-family:var(--font-mono);font-variant-numeric:tabular-nums;font-size:var(--fs-data-xl,40px);line-height:1.05;color:var(--ink-900)}
.calc-out .what{color:var(--ink-700);font-size:15px}

/* Pricing */
.price-wrap{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(380px,100%),1fr));gap:24px;align-items:start}
.price-card{padding:32px;display:flex;flex-direction:column;gap:16px}
.price-card .amount{font-family:var(--font-mono);font-variant-numeric:tabular-nums;font-size:44px;line-height:1.05;color:var(--ink-900)}
.price-card .amount.words{font-family:var(--font-display);font-weight:700;font-size:32px;letter-spacing:-0.01em}
.price-card .per{color:var(--ink-700)}
.ticks{list-style:none;padding:0;margin:0;display:flex;flex-direction:column;gap:10px;color:var(--ink-700)}
.ticks li{display:flex;gap:10px;align-items:flex-start}
.ticks svg{flex:none;margin-top:3px;color:var(--accent-text)}
.config{padding:32px;display:flex;flex-direction:column;gap:16px}
.seg{display:inline-flex;border:1px solid var(--glass-border-3);border-radius:var(--radius-pill);overflow:hidden}
.seg label{position:relative}
.seg input{position:absolute;opacity:0;width:1px;height:1px}
.seg span{display:inline-flex;align-items:center;min-height:44px;padding:0 18px;cursor:pointer;color:var(--ink-700)}
.seg input:checked + span{background:var(--accent-subtle);color:var(--accent-text)}
.seg input:focus-visible + span{outline:2px solid var(--focus-ring);outline-offset:-2px}

/* Requirements, questions */
.req-list{list-style:none;padding:0;margin:0;display:flex;flex-direction:column;gap:12px}
.req-list li{display:flex;gap:12px;color:var(--ink-700)}
.req-list svg{flex:none;color:var(--accent-text);margin-top:2px}

/* Downloads */
.dl-table{width:100%;border-collapse:collapse;min-width:640px}
.dl-table th{text-align:left;font-size:13px;color:var(--ink-500);font-weight:600;padding:10px 12px;border-bottom:1px solid var(--glass-border-3)}
.dl-table td{padding:16px 12px;border-bottom:1px solid var(--glass-border-2);color:var(--ink-700);vertical-align:top}
.dl-table td:first-child{color:var(--ink-900);font-weight:600}
.dl-wrap{overflow-x:auto}

/* Request form */
.req-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(440px,100%),1fr));gap:32px;align-items:start}
.kinds{display:flex;flex-wrap:wrap;gap:8px}

.cta-band{padding:48px;display:grid;grid-template-columns:repeat(auto-fit,minmax(min(380px,100%),1fr));gap:24px;align-items:center}
.cta-band .row{justify-content:flex-end}
@media (max-width:600px){.cta-band{padding:24px}.cta-band .row{justify-content:flex-start}.finder,.calc,.config,.price-card{padding:24px}}

@media (prefers-reduced-motion:reduce){.uni{--dock:1}.uni-tile{will-change:auto}}