/* =========================================================================
   SKILLORA ACADEMY — core design system
   Shared by the marketing site and the student app.

   00 FONTS · 01 TOKENS · 02 RESET · 03 TYPE · 04 LAYOUT · 05 CONTROLS
   06 CARDS & BADGES · 07 HEADER · 08 FOOTER · 09 MARKETING
   10 COURSE · 11 CURRICULUM · 12 PROGRESS · 13 OVERLAYS
   14 MOTION / RESPONSIVE / A11Y
   ========================================================================= */

/* ============================== 00 FONTS ================================ */
@font-face{
  font-family:"Vazirmatn";
  src:url("../assets/fonts/vazirmatn-arabic.woff2") format("woff2");
  font-weight:100 900; font-style:normal; font-display:swap;
  unicode-range:U+0600-06FF,U+0750-077F,U+08A0-08FF,U+FB50-FDFF,U+FE70-FEFF,U+200C,U+200F,U+061C;
}
@font-face{
  font-family:"Vazirmatn";
  src:url("../assets/fonts/vazirmatn-latin.woff2") format("woff2");
  font-weight:100 900; font-style:normal; font-display:swap;
  unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+2000-206F,U+2074,U+20AC,U+2212;
}

/* ============================== 01 TOKENS =============================== */
:root{
  /* neutrals */
  --ink-900:#10131A;
  --ink-800:#171B24;
  --ink-700:#1F2531;
  --ink-600:#2B3342;
  --slate-500:#5A6478;
  --slate-400:#7C879B;
  --slate-300:#AEB7C6;
  --line-200:#D9DEE7;
  --line-100:#E7EBF1;
  --paper-2:#EFF1F5;
  --paper:#F7F8FA;
  --white:#FFFFFF;

  /* brand */
  --cobalt:#2A5BD7;
  --cobalt-700:#1E45A8;
  --cobalt-300:#8FA9EE;
  --cobalt-50:#EAEFFC;
  --violet:#6D4AD1;
  --violet-50:#F0EBFB;
  --teal:#12857A;
  --teal-50:#E4F3F1;
  --amber:#B4700E;
  --amber-50:#FBF1E0;
  --rose:#C0334F;
  --rose-50:#FBE9EC;

  /* category hues — mirrored from the asset generator */
  --cat-design:#6D4AD1;   --cat-design-50:#F0EBFB;
  --cat-dev:#2A5BD7;      --cat-dev-50:#EAEFFC;
  --cat-data:#12857A;     --cat-data-50:#E4F3F1;
  --cat-ai:#8A3FBF;       --cat-ai-50:#F3E9FA;
  --cat-business:#3E5C88; --cat-business-50:#EAEFF6;
  --cat-marketing:#B03A63;--cat-marketing-50:#FAEAF0;
  --cat-product:#B4700E;  --cat-product-50:#FBF1E0;

  /* semantic surfaces (light) */
  --bg:var(--paper);
  --surface:var(--white);
  --surface-2:var(--paper-2);
  --fg:var(--ink-900);
  --fg-2:var(--slate-500);
  --fg-3:var(--slate-400);
  --line:var(--line-200);
  --line-soft:var(--line-100);
  --field:var(--white);
  --accent:var(--cobalt);
  --ok:var(--teal);
  --warn:var(--amber);
  --err:#C0334F;
  --err-soft:var(--rose-50);

  /* type */
  --font:"Vazirmatn","Vazir","IRANSansX","Segoe UI",Tahoma,sans-serif;
  --font-lat:"Inter","Segoe UI",Helvetica,Arial,sans-serif;
  --font-mono:"JetBrains Mono","Cascadia Mono",Consolas,monospace;

  --fs-display:clamp(1.95rem,3.9vw,3.15rem);
  --fs-h1:clamp(1.6rem,2.7vw,2.25rem);
  --fs-h2:clamp(1.28rem,1.9vw,1.7rem);
  --fs-h3:clamp(1.05rem,1.3vw,1.2rem);
  --fs-h4:1rem;
  --fs-lead:clamp(1rem,1.1vw,1.1rem);
  --fs-body:1rem;
  --fs-sm:.9375rem;
  --fs-xs:.8438rem;
  --fs-2xs:.7813rem;

  --lh-head:1.6;
  --lh-tight:1.42;
  --lh-body:1.9;

  /* space & shape */
  --gutter:clamp(1.1rem,3vw,2.5rem);
  --container:1240px;
  --container-mid:1000px;
  --container-narrow:720px;
  --section-y:clamp(3.25rem,6vw,6rem);

  --r-xs:4px; --r-sm:8px; --r:12px; --r-lg:16px; --r-xl:22px; --r-pill:999px;
  --control-h:50px;

  --sh-1:0 1px 2px rgba(16,19,26,.06);
  --sh-2:0 4px 14px -6px rgba(16,19,26,.12);
  --sh-3:0 18px 44px -18px rgba(16,19,26,.22);
  --ring:0 0 0 3px rgba(42,91,215,.18);

  --ease:cubic-bezier(.22,1,.36,1);
  --d1:150ms; --d2:260ms; --d3:440ms;

  --z-header:60; --z-overlay:80; --z-drawer:90; --z-modal:100; --z-toast:110;
  --header-h:66px;
}
@media (min-width:1024px){ :root{--header-h:74px} }

[data-theme="dark"]{
  --bg:var(--ink-900);
  --surface:var(--ink-800);
  --surface-2:var(--ink-700);
  --fg:#EEF1F6;
  --fg-2:#A6B0C2;
  --fg-3:#7C879B;
  --line:#2A3140;
  --line-soft:#222835;
  --field:#141824;
  --accent:#7CA0F5;
  --cobalt-50:#1A2440;
  --violet-50:#221B3A;
  --teal-50:#12312E;
  --amber-50:#312613;
  --rose-50:#33161C;
  --cat-design-50:#241C3E; --cat-dev-50:#152342; --cat-data-50:#0F2E2B;
  --cat-ai-50:#2A1740; --cat-business-50:#17222F; --cat-marketing-50:#2E1520;
  --cat-product-50:#2E2210;
  --err:#E8798D;
  --sh-1:0 1px 2px rgba(0,0,0,.4);
  --sh-2:0 4px 14px -6px rgba(0,0,0,.6);
  --sh-3:0 18px 44px -18px rgba(0,0,0,.8);
  --ring:0 0 0 3px rgba(124,160,245,.24);
  color-scheme:dark;
}

/* ============================== 02 RESET ================================ */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;overflow-x:clip}
body,h1,h2,h3,h4,h5,p,figure,dl,dd,ul,ol,fieldset{margin:0}
ul,ol{list-style:none;padding:0}
fieldset{border:0;padding:0;min-inline-size:0}
img,svg,video{max-width:100%;display:block}
/* icons are injected from JS without dimensions — give them a sane default;
   component rules and .ring/.chart (which carry classes) still win */
svg:not([class]){inline-size:1.15em;block-size:1.15em;flex:none}
[hidden]{display:none !important}
button,input,select,textarea{font:inherit;color:inherit}
button{background:none;border:0;padding:0;cursor:pointer}
a{color:inherit;text-decoration:none}
table{border-collapse:collapse;inline-size:100%}
:where(a,button,input,select,textarea,summary,[tabindex]):focus-visible{
  outline:2px solid var(--accent);outline-offset:2px;border-radius:var(--r-xs);
}
body{
  margin:0;background:var(--bg);color:var(--fg);
  font-family:var(--font);font-size:var(--fs-body);line-height:var(--lh-body);
  overflow-x:clip;-webkit-font-smoothing:antialiased;
  transition:background-color var(--d2) var(--ease),color var(--d2) var(--ease);
}
body.is-locked{overflow:hidden}
::selection{background:var(--cobalt);color:#fff}
[id]{scroll-margin-block-start:calc(var(--header-h) + 1.25rem)}
.sr-only{
  position:absolute;inline-size:1px;block-size:1px;padding:0;margin:-1px;
  overflow:hidden;clip:rect(0 0 0 0);clip-path:inset(50%);white-space:nowrap;border:0;
}
.skip-link{
  position:absolute;inset-block-start:-100px;inset-inline-start:1rem;z-index:var(--z-toast);
  background:var(--cobalt);color:#fff;padding:.75rem 1.15rem;border-radius:var(--r-sm);
  transition:inset-block-start var(--d2) var(--ease);
}
.skip-link:focus{inset-block-start:1rem}

/* ============================= 03 TYPE ================================== */
h1,h2,h3,h4{line-height:var(--lh-head);font-weight:600;text-wrap:balance}
h1{font-size:var(--fs-h1)} h2{font-size:var(--fs-h2)}
h3{font-size:var(--fs-h3)} h4{font-size:var(--fs-h4)}
p{max-width:68ch}
.display{font-size:var(--fs-display);line-height:var(--lh-tight);font-weight:700;letter-spacing:-.01em}
.lead{font-size:var(--fs-lead);color:var(--fg-2);line-height:1.95;max-width:56ch}
.text-sm{font-size:var(--fs-sm)} .text-xs{font-size:var(--fs-xs)} .text-2xs{font-size:var(--fs-2xs)}
.muted{color:var(--fg-2)} .muted-2{color:var(--fg-3)}
.num{font-variant-numeric:tabular-nums}
.mono{font-family:var(--font-mono);letter-spacing:.02em}
/* Latin only — never letter-space Persian */
.lat,:lang(en){font-family:var(--font-lat);letter-spacing:.02em}
.eyebrow{
  display:inline-flex;align-items:center;gap:.5rem;
  font-size:var(--fs-2xs);font-weight:600;color:var(--accent);
  padding:.3rem .7rem;border-radius:var(--r-pill);background:var(--cobalt-50);
}
.eyebrow--violet{color:var(--violet);background:var(--violet-50)}
.eyebrow--teal{color:var(--teal);background:var(--teal-50)}

.brand{display:inline-flex;align-items:center;gap:.6rem;font-weight:700;font-size:1.08rem;color:var(--fg)}
.brand__mark{
  inline-size:32px;block-size:32px;border-radius:9px;flex:none;
  display:grid;place-items:center;background:var(--cobalt);color:#fff;
  font-family:var(--font-lat);font-weight:700;font-size:.92rem;
}
.brand small{display:block;font-size:.68rem;font-weight:400;color:var(--fg-3);margin-block-start:1px}

/* ============================= 04 LAYOUT ================================ */
.container{inline-size:100%;max-inline-size:var(--container);margin-inline:auto;padding-inline:var(--gutter)}
.container--mid{max-inline-size:var(--container-mid)}
.container--narrow{max-inline-size:var(--container-narrow)}
.section{padding-block:var(--section-y)}
.section--tight{padding-block:clamp(2.25rem,4.5vw,3.75rem)}
.surface-alt{background:var(--surface-2)}
.stack>*+*{margin-block-start:var(--stack,1rem)}

.grid{display:grid;gap:var(--gap,clamp(1rem,2vw,1.5rem))}
.g-2{grid-template-columns:repeat(2,minmax(0,1fr))}
.g-3{grid-template-columns:repeat(3,minmax(0,1fr))}
.g-4{grid-template-columns:repeat(4,minmax(0,1fr))}
.split{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:clamp(1.75rem,4vw,3.5rem);align-items:center}
.split--start{grid-template-columns:minmax(0,1.05fr) minmax(0,.95fr)}
.split--end{grid-template-columns:minmax(0,.95fr) minmax(0,1.05fr)}
.split--top{align-items:start}
.row{display:flex;align-items:center;gap:var(--gap,.75rem);flex-wrap:wrap}
.row--between{justify-content:space-between}

.sec-head{margin-block-end:clamp(1.5rem,3vw,2.5rem);max-inline-size:60ch}
.sec-head h2{margin-block-start:.85rem}
.sec-head .lead{margin-block-start:.7rem}
.sec-head--center{margin-inline:auto;text-align:center}
.sec-head--center .lead{margin-inline:auto}
.sec-head--row{max-inline-size:none;display:flex;align-items:flex-end;justify-content:space-between;gap:1rem 2rem;flex-wrap:wrap}

.media{position:relative;overflow:hidden;background:var(--surface-2);border-radius:var(--r)}
.media img{inline-size:100%;block-size:100%;object-fit:cover}
.ar-16-10{aspect-ratio:16/10} .ar-16-9{aspect-ratio:16/9} .ar-4-3{aspect-ratio:4/3}
.ar-1-1{aspect-ratio:1/1} .ar-3-2{aspect-ratio:3/2} .ar-3-4{aspect-ratio:3/4}
/* lets an image drive its own height instead of a ratio box */
.media--auto{aspect-ratio:auto}
.media--auto img{block-size:auto}


.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:.3rem;font-size:var(--fs-xs);color:var(--fg-3)}
.breadcrumb a{display:inline-block;padding:.3rem .3rem;margin-inline:-.3rem;transition:color var(--d1) var(--ease)}
.breadcrumb a:hover{color:var(--fg)}
.breadcrumb svg{inline-size:.7rem;block-size:.7rem;opacity:.55}
.breadcrumb [aria-current="page"]{color:var(--fg-2)}

.page-head{padding-block:clamp(1.75rem,3.5vw,2.75rem) clamp(1.25rem,2.5vw,2rem)}
.page-head h1{margin-block:1rem .7rem}

/* =========================== 05 CONTROLS ================================ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:.5em;
  min-block-size:var(--control-h);padding-inline:clamp(1.1rem,2vw,1.6rem);padding-block:.55rem;
  font-size:var(--fs-sm);font-weight:600;text-align:center;
  border:1px solid transparent;border-radius:var(--r-sm);cursor:pointer;position:relative;
  transition:background-color var(--d1) var(--ease),color var(--d1) var(--ease),
             border-color var(--d1) var(--ease),box-shadow var(--d1) var(--ease),opacity var(--d1) var(--ease);
}
.btn svg{inline-size:1.1em;block-size:1.1em;flex:none}
.btn--primary{background:var(--cobalt);color:#fff;border-color:var(--cobalt);box-shadow:var(--sh-1)}
.btn--primary:hover{background:var(--cobalt-700);border-color:var(--cobalt-700)}
.btn--violet{background:var(--violet);color:#fff;border-color:var(--violet)}
.btn--violet:hover{filter:brightness(.92)}
.btn--soft{background:var(--cobalt-50);color:var(--cobalt);border-color:transparent}
.btn--soft:hover{background:var(--cobalt);color:#fff}
.btn--ghost{border-color:var(--line);color:var(--fg);background:var(--surface)}
.btn--ghost:hover{border-color:var(--fg-3);background:var(--surface-2)}
.btn--quiet{min-block-size:42px;padding-inline:.5rem;border:0;color:var(--accent);background:none}
.btn--quiet:hover{text-decoration:underline;text-underline-offset:5px}
.btn--danger{background:var(--err);color:#fff;border-color:var(--err)}
.btn--block{inline-size:100%}
.btn--sm{min-block-size:42px;padding-inline:.95rem;font-size:var(--fs-xs)}
.btn--lg{min-block-size:56px;padding-inline:1.9rem;font-size:var(--fs-body)}
.btn[disabled],.btn[aria-disabled="true"]{opacity:.45;cursor:not-allowed}

.link-arrow{display:inline-flex;align-items:center;gap:.45rem;min-block-size:42px;color:var(--accent);font-size:var(--fs-sm);font-weight:600}
.link-arrow svg{inline-size:1em;block-size:1em;transition:transform var(--d2) var(--ease)}
.link-arrow:hover svg{transform:translateX(-5px)}
.icon-btn{
  inline-size:44px;block-size:44px;display:inline-grid;place-items:center;position:relative;
  border-radius:var(--r-sm);color:var(--fg-2);
  transition:background-color var(--d1) var(--ease),color var(--d1) var(--ease);
}
.icon-btn:hover{background:var(--surface-2);color:var(--fg)}
.icon-btn svg{inline-size:1.2rem;block-size:1.2rem}
.icon-btn__dot{
  position:absolute;inset-block-start:9px;inset-inline-end:9px;
  inline-size:7px;block-size:7px;border-radius:var(--r-pill);background:var(--rose);
  border:1.5px solid var(--surface);
}

.field{display:grid;gap:.4rem}
.field-label{font-size:var(--fs-sm);font-weight:600;color:var(--fg)}
.field-label .req{color:var(--err)}
.field-hint{font-size:var(--fs-xs);color:var(--fg-3);line-height:1.75}
.input,.textarea,.select{
  inline-size:100%;min-block-size:var(--control-h);padding:.7rem .95rem;
  background:var(--field);border:1px solid var(--line);border-radius:var(--r-sm);
  color:var(--fg);font-size:var(--fs-sm);
  transition:border-color var(--d1) var(--ease),box-shadow var(--d1) var(--ease);
}
.textarea{min-block-size:120px;resize:vertical;line-height:1.85}
.input::placeholder,.textarea::placeholder{color:var(--fg-3)}
.input:hover,.textarea:hover,.select:hover{border-color:var(--slate-300)}
.input:focus,.textarea:focus,.select:focus{outline:none;border-color:var(--cobalt);box-shadow:var(--ring)}
.input:disabled,.select:disabled,.textarea:disabled{background:var(--surface-2);color:var(--fg-3);cursor:not-allowed}
.select{
  appearance:none;cursor:pointer;padding-inline-start:2.4rem;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%237C879B' stroke-width='1.8' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E");
  background-repeat:no-repeat;background-position:left .95rem top 50%;background-size:16px 16px;
}
.input-icon{position:relative}
.input-icon .input{padding-inline-start:2.75rem}
.input-icon > svg{
  position:absolute;inset-inline-start:.95rem;inset-block-start:50%;transform:translateY(-50%);
  inline-size:1.05rem;block-size:1.05rem;color:var(--fg-3);pointer-events:none;
}
.input-icon .icon-btn{position:absolute;inset-inline-end:4px;inset-block-start:50%;transform:translateY(-50%)}
.field-error{display:none;font-size:var(--fs-xs);color:var(--err);align-items:center;gap:.35rem}
.field-error svg{inline-size:.9rem;block-size:.9rem;flex:none}
.field.has-error .input,.field.has-error .textarea,.field.has-error .select{
  border-color:var(--err);box-shadow:0 0 0 3px var(--err-soft);
}
.field.has-error .field-error{display:flex}
.field.is-ok .input{border-color:var(--ok)}
.checkbox,.switch-row{display:flex;align-items:flex-start;gap:.65rem;cursor:pointer;font-size:var(--fs-sm);color:var(--fg-2);line-height:1.8;padding-block:.6rem;min-block-size:44px}
.checkbox input{
  appearance:none;flex:none;inline-size:24px;block-size:24px;margin-block-start:.1rem;
  border:1.5px solid var(--line);border-radius:6px;background:var(--field);
  position:relative;cursor:pointer;
  transition:background-color var(--d1) var(--ease),border-color var(--d1) var(--ease);
}
.checkbox input:checked{background:var(--cobalt);border-color:var(--cobalt)}
.checkbox input:checked::after{
  content:"";position:absolute;inset-block-start:5px;inset-inline-start:9px;
  inline-size:5px;block-size:10px;border:solid #fff;border-width:0 0 2px 2px;transform:rotate(-45deg);
}
.checkbox.has-error input{border-color:var(--err)}
.switch{
  appearance:none;flex:none;inline-size:46px;block-size:26px;border-radius:var(--r-pill);
  background:var(--line);position:relative;cursor:pointer;
  transition:background-color var(--d2) var(--ease);
}
.switch::after{
  content:"";position:absolute;inset-block-start:3px;inset-inline-end:3px;
  inline-size:20px;block-size:20px;border-radius:var(--r-pill);background:#fff;
  box-shadow:var(--sh-1);transition:transform var(--d2) var(--ease);
}
.switch:checked{background:var(--cobalt)}
.switch:checked::after{transform:translateX(-20px)}
.form-note{font-size:var(--fs-xs);color:var(--fg-3);line-height:1.85}
.form-note svg{inline-size:.9rem;block-size:.9rem;display:inline;vertical-align:-2px;color:var(--accent)}

/* ======================== 06 CARDS & BADGES ============================= */
.card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r);
  padding:clamp(1.1rem,2vw,1.5rem);
  transition:border-color var(--d2) var(--ease),box-shadow var(--d2) var(--ease),transform var(--d2) var(--ease);
}
.card--flat{background:var(--surface-2);border-color:transparent}
.card--link:hover{border-color:var(--slate-300);box-shadow:var(--sh-2)}
.card__icon{
  inline-size:42px;block-size:42px;border-radius:var(--r-sm);flex:none;
  display:grid;place-items:center;background:var(--cobalt-50);color:var(--cobalt);
}
.card__icon svg{inline-size:1.2rem;block-size:1.2rem}
.card__icon--violet{background:var(--violet-50);color:var(--violet)}
.card__icon--teal{background:var(--teal-50);color:var(--teal)}
.card__icon--amber{background:var(--amber-50);color:var(--amber)}

.badge{
  display:inline-flex;align-items:center;gap:.3rem;
  padding:.22rem .6rem;border-radius:var(--r-pill);
  font-size:var(--fs-2xs);font-weight:600;
  background:var(--surface-2);color:var(--fg-2);
}
.badge svg{inline-size:.85em;block-size:.85em}
.badge--ok{background:var(--teal-50);color:var(--teal)}
.badge--warn{background:var(--amber-50);color:var(--amber)}
.badge--accent{background:var(--cobalt-50);color:var(--cobalt)}
.badge--violet{background:var(--violet-50);color:var(--violet)}
.badge--outline{background:transparent;border:1px solid var(--line);color:var(--fg-2)}
.badge--demo{background:transparent;border:1px dashed var(--line);color:var(--fg-3);font-weight:400}

.chip{
  display:inline-flex;align-items:center;gap:.4rem;min-block-size:40px;
  padding-inline:.95rem;border-radius:var(--r-pill);font-size:var(--fs-xs);font-weight:500;
  border:1px solid var(--line);background:var(--surface);color:var(--fg-2);cursor:pointer;
  transition:border-color var(--d1) var(--ease),color var(--d1) var(--ease),background-color var(--d1) var(--ease);
}
.chip:hover{border-color:var(--slate-300);color:var(--fg)}
.chip[aria-pressed="true"],.chip.is-active{background:var(--cobalt);border-color:var(--cobalt);color:#fff}
.chip__x{inline-size:1rem;block-size:1rem;opacity:.7}

.note{
  display:flex;gap:.8rem;align-items:flex-start;
  padding:.9rem 1.1rem;border-radius:var(--r-sm);
  background:var(--cobalt-50);font-size:var(--fs-xs);color:var(--fg-2);line-height:1.85;
}
.note svg{inline-size:1rem;block-size:1rem;color:var(--cobalt);flex:none;margin-block-start:.3rem}
.note strong{color:var(--fg);font-weight:600}
.note--quiet{background:var(--surface-2)}
.note--quiet svg{color:var(--fg-3)}

.empty{
  display:grid;justify-items:center;text-align:center;gap:.8rem;
  padding:clamp(2rem,4.5vw,3.5rem) 1.25rem;
  border:1px dashed var(--line);border-radius:var(--r);background:var(--surface);
}
.empty__icon{
  inline-size:52px;block-size:52px;border-radius:var(--r);display:grid;place-items:center;
  background:var(--surface-2);color:var(--fg-3);
}
.empty__icon svg{inline-size:1.4rem;block-size:1.4rem}
.empty h3{margin-block-start:.2rem}
.empty p{font-size:var(--fs-sm);color:var(--fg-2);max-width:46ch}

/* ============================= 07 HEADER ================================ */
.site-header{
  position:sticky;inset-block-start:0;z-index:var(--z-header);
  background:color-mix(in srgb,var(--bg) 88%,transparent);
  backdrop-filter:saturate(150%) blur(12px);-webkit-backdrop-filter:saturate(150%) blur(12px);
  border-block-end:1px solid var(--line);
}
@supports not (background:color-mix(in srgb,red 50%,blue)){ .site-header{background:var(--bg)} }
.header-inner{display:flex;align-items:center;gap:1rem;min-block-size:var(--header-h)}
.header-nav{display:flex;align-items:center;gap:.15rem;margin-inline-start:clamp(1rem,3vw,2.25rem)}
.header-nav a{
  position:relative;display:inline-flex;align-items:center;min-block-size:42px;
  padding-inline:.85rem;border-radius:var(--r-sm);font-size:var(--fs-sm);font-weight:500;color:var(--fg-2);
  transition:color var(--d1) var(--ease),background-color var(--d1) var(--ease);
}
.header-nav a:hover{color:var(--fg);background:var(--surface-2)}
.header-nav a[aria-current="page"]{color:var(--cobalt);background:var(--cobalt-50)}
.header-actions{display:flex;align-items:center;gap:.45rem;margin-inline-start:auto}
.menu-toggle{display:none}

.overlay{
  position:fixed;inset:0;z-index:var(--z-overlay);background:rgba(16,19,26,.5);
  opacity:0;visibility:hidden;transition:opacity var(--d2) var(--ease),visibility 0s linear var(--d2);
}
.overlay.is-open{opacity:1;visibility:visible;transition-delay:0s}
.drawer{
  position:fixed;inset-block:0;inset-inline-start:0;z-index:var(--z-drawer);
  inline-size:min(340px,90vw);background:var(--surface);
  display:flex;flex-direction:column;box-shadow:var(--sh-3);
  transform:translateX(100%);visibility:hidden;
  transition:transform var(--d3) var(--ease),visibility 0s linear var(--d3);
}
.drawer.is-open{transform:translateX(0);visibility:visible;transition-delay:0s}
.drawer__head{display:flex;align-items:center;justify-content:space-between;gap:1rem;padding:.85rem var(--gutter);border-block-end:1px solid var(--line);flex:none}
.drawer__body{flex:1;overflow-y:auto;overscroll-behavior:contain;padding:1.25rem var(--gutter)}
.drawer__foot{flex:none;padding:1.15rem var(--gutter);border-block-start:1px solid var(--line);display:grid;gap:.55rem}
.mobile-nav{display:grid;gap:.15rem}
.mobile-nav a{
  display:flex;align-items:center;justify-content:space-between;gap:.75rem;
  padding:.85rem .75rem;border-radius:var(--r-sm);font-size:1.02rem;font-weight:500;
}
.mobile-nav a:hover{background:var(--surface-2)}
.mobile-nav a[aria-current="page"]{color:var(--cobalt);background:var(--cobalt-50)}
.mobile-nav svg{inline-size:.85rem;block-size:.85rem;opacity:.45}

/* ============================= 08 FOOTER ================================ */
.site-footer{background:var(--ink-900);color:#A6B0C2;padding-block:clamp(3rem,5vw,4.5rem) 1.5rem}
[data-theme="dark"] .site-footer{background:#0A0D13}
.footer-grid{display:grid;grid-template-columns:minmax(0,1.5fr) repeat(3,minmax(0,1fr));gap:clamp(1.5rem,3vw,2.75rem)}
.footer-brand .brand{color:#fff}
.footer-brand p{font-size:var(--fs-sm);margin-block-start:1.1rem;max-width:34ch;line-height:1.9}
.footer-col h3{font-size:var(--fs-2xs);letter-spacing:.1em;text-transform:uppercase;font-family:var(--font-lat);color:#7C879B;margin-block-end:1rem;font-weight:600}
.footer-col ul{display:grid;grid-template-columns:minmax(0,1fr);gap:.1rem}
.footer-col a,.footer-col li{font-size:var(--fs-sm);min-inline-size:0;overflow-wrap:break-word}
.footer-col a{display:inline-block;padding:.38rem .3rem;margin-inline:-.3rem;transition:color var(--d1) var(--ease)}
.footer-col a:hover{color:#fff}
.footer-social{display:flex;gap:.45rem;margin-block-start:1.35rem}
.footer-social a{
  inline-size:42px;block-size:42px;display:grid;place-items:center;border-radius:var(--r-sm);
  border:1px solid rgba(255,255,255,.14);transition:border-color var(--d1) var(--ease),color var(--d1) var(--ease);
}
.footer-social a:hover{border-color:#fff;color:#fff}
.footer-social svg{inline-size:1.05rem;block-size:1.05rem}
.footer-bottom{
  margin-block-start:clamp(2.25rem,4vw,3rem);padding-block-start:1.4rem;
  border-block-start:1px solid rgba(255,255,255,.1);
  display:flex;flex-wrap:wrap;gap:.6rem 2rem;justify-content:space-between;align-items:center;
  font-size:var(--fs-xs);color:#7C879B;
}
.footer-bottom p{max-width:none}

/* =========================== 09 MARKETING =============================== */
.hero{position:relative;overflow:hidden;padding-block:clamp(2.5rem,5vw,4.5rem) clamp(2.5rem,5vw,4rem)}
.hero::before{
  content:"";position:absolute;inset-block-start:-30%;inset-inline-end:-10%;
  inline-size:70%;block-size:80%;pointer-events:none;
  background:radial-gradient(closest-side,rgba(42,91,215,.14),transparent 70%);
}
[data-theme="dark"] .hero::before{background:radial-gradient(closest-side,rgba(124,160,245,.16),transparent 70%)}
.hero__grid{position:relative;display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.08fr);gap:clamp(2rem,4vw,3.5rem);align-items:center}
.hero__copy h1{margin-block:1rem 1.1rem}
.hero__actions{display:flex;flex-wrap:wrap;gap:.7rem;margin-block-start:1.9rem}
.hero__points{display:flex;flex-wrap:wrap;gap:.6rem 1.5rem;margin-block-start:1.9rem;font-size:var(--fs-sm);color:var(--fg-2)}
.hero__points li{display:flex;align-items:center;gap:.5rem}
.hero__points svg{inline-size:1.05rem;block-size:1.05rem;color:var(--teal);flex:none}
.hero__stage{position:relative}
.hero__stage .media{box-shadow:var(--sh-3);border:1px solid var(--line)}
.hero__float{
  position:absolute;background:var(--surface);border:1px solid var(--line);border-radius:var(--r);
  box-shadow:var(--sh-2);padding:.85rem 1rem;display:flex;align-items:center;gap:.75rem;
}
.hero__float--a{inset-block-end:-14px;inset-inline-start:-14px}
.hero__float--b{inset-block-start:-16px;inset-inline-end:24px}
.hero__float b{display:block;font-size:var(--fs-sm);font-weight:600}
.hero__float span{font-size:var(--fs-2xs);color:var(--fg-3)}

.searchbar{
  display:flex;gap:.5rem;padding:.4rem;background:var(--surface);
  border:1px solid var(--line);border-radius:var(--r-lg);box-shadow:var(--sh-2);
}
.searchbar .input-icon{flex:1;min-inline-size:0}
.searchbar .input{border:0;box-shadow:none;background:transparent}
.searchbar .input:focus{box-shadow:none}
.searchbar .btn{flex:none}

.cat-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:clamp(.7rem,1.5vw,1rem)}
.cat-card{
  display:flex;align-items:center;gap:.85rem;padding:1rem 1.15rem;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r);
  transition:border-color var(--d1) var(--ease),box-shadow var(--d1) var(--ease);
}
.cat-card:hover{border-color:var(--slate-300);box-shadow:var(--sh-2)}
.cat-card__mark{inline-size:38px;block-size:38px;border-radius:10px;flex:none;display:grid;place-items:center}
.cat-card__mark svg{inline-size:1.1rem;block-size:1.1rem}
.cat-card b{display:block;font-size:var(--fs-sm);font-weight:600}
.cat-card span{font-size:var(--fs-2xs);color:var(--fg-3)}

.step-list{counter-reset:st;display:grid;gap:clamp(1rem,2vw,1.5rem);grid-template-columns:repeat(3,minmax(0,1fr))}
.step-list li{position:relative;padding-block-start:3.1rem}
.step-list li::before{
  counter-increment:st;content:counter(st);
  position:absolute;inset-block-start:0;inset-inline-start:0;
  inline-size:36px;block-size:36px;border-radius:var(--r-sm);
  display:grid;place-items:center;background:var(--cobalt-50);color:var(--cobalt);
  font-weight:700;font-size:var(--fs-sm);
}
.step-list h3{margin-block-end:.4rem}
.step-list p{font-size:var(--fs-sm);color:var(--fg-2)}

.tutor-card{
  display:grid;gap:1rem;background:var(--surface);border:1px solid var(--line);
  border-radius:var(--r);overflow:hidden;transition:border-color var(--d2) var(--ease),box-shadow var(--d2) var(--ease);
}
.tutor-card:hover{border-color:var(--slate-300);box-shadow:var(--sh-2)}
.tutor-card__media{display:block;aspect-ratio:1/1;background:var(--ink-800);overflow:hidden;min-inline-size:0}
.tutor-card__media img{inline-size:100%;block-size:100%;object-fit:cover}
.tutor-card__body{display:grid;padding:0 1.15rem 1.35rem;gap:.5rem;min-inline-size:0}
.tutor-card h3{font-size:var(--fs-h4)}
.tutor-card__role{font-size:var(--fs-xs);color:var(--accent);font-weight:600}
.tutor-card p{font-size:var(--fs-xs);color:var(--fg-2);line-height:1.8}
.tutor-card__role{display:block}
.tutor-card__meta{display:flex;gap:.9rem;font-size:var(--fs-2xs);color:var(--fg-3);padding-block-start:.6rem;border-block-start:1px solid var(--line-soft)}

.post-card{
  display:grid;gap:.9rem;background:var(--surface);border:1px solid var(--line);
  border-radius:var(--r);overflow:hidden;block-size:100%;align-content:start;
  transition:border-color var(--d2) var(--ease),box-shadow var(--d2) var(--ease);
}
.post-card:hover{border-color:var(--slate-300);box-shadow:var(--sh-2)}
.post-card__media{display:block;aspect-ratio:3/2;background:var(--surface-2);overflow:hidden;min-inline-size:0}
.post-card__media img{inline-size:100%;block-size:100%;object-fit:cover}
.post-card__body{display:grid;padding:0 1.15rem 1.3rem;gap:.55rem;min-inline-size:0}
.post-card h3{font-size:var(--fs-h4);line-height:1.7}
.post-card p{font-size:var(--fs-xs);color:var(--fg-2)}
.post-card__meta{display:flex;flex-wrap:wrap;gap:.5rem .9rem;font-size:var(--fs-2xs);color:var(--fg-3);margin-block-start:.2rem}
.post-card--wide{grid-template-columns:minmax(0,1.15fr) minmax(0,1fr);align-items:stretch;gap:0}
.post-card--wide .post-card__media{aspect-ratio:auto;block-size:100%;min-block-size:240px}
.post-card--wide .post-card__body{padding:clamp(1.25rem,2.5vw,2rem);align-content:center;gap:.7rem}
.post-card--wide h3{font-size:var(--fs-h2)}

/* ------------------------------- article ------------------------------- */
.article{padding-block:clamp(1.5rem,3vw,2.5rem) 0}
.article__inner{
  inline-size:100%;max-inline-size:var(--container-narrow);
  margin-inline:auto;padding-inline:var(--gutter);
}
.article__head{margin-block-end:clamp(1.5rem,3vw,2.25rem)}
.article__head h1{margin-block:1rem .8rem;font-size:clamp(1.7rem,3vw,2.4rem);line-height:1.5}
.article__meta{
  display:flex;flex-wrap:wrap;align-items:center;gap:.75rem 1.15rem;
  margin-block-start:1.35rem;padding-block:1rem;
  border-block:1px solid var(--line);font-size:var(--fs-xs);color:var(--fg-3);
}
.article__meta img{inline-size:34px;block-size:34px;border-radius:var(--r-pill);object-fit:cover;flex:none}
.article__meta b{color:var(--fg);font-weight:600;font-size:var(--fs-sm)}
.article__meta .dot{inline-size:4px;block-size:4px;border-radius:var(--r-pill);background:var(--line-200);flex:none}
.article__cover{
  inline-size:100%;max-inline-size:var(--container-mid);margin-inline:auto;
  padding-inline:var(--gutter);margin-block:clamp(1.5rem,3vw,2.25rem);
}
.article__cover .media{aspect-ratio:3/2;border-radius:var(--r-lg)}
.article__body{font-size:1.0625rem;line-height:2.05;color:var(--fg-2)}
.article__body p{max-width:none}
.article__body p + p{margin-block-start:1.2rem}
.article__body p:first-child{font-size:1.14rem;color:var(--fg);line-height:1.95}
.article__foot{margin-block-start:clamp(2rem,4vw,3rem)}
.article-nav{
  display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:.75rem;
  margin-block-start:1.5rem;
}
.article-nav a{
  display:grid;gap:.35rem;padding:1rem 1.15rem;
  border:1px solid var(--line);border-radius:var(--r);background:var(--surface);
  transition:border-color var(--d1) var(--ease),box-shadow var(--d1) var(--ease);
}
.article-nav a:hover{border-color:var(--slate-300);box-shadow:var(--sh-2)}
.article-nav span{font-size:var(--fs-2xs);color:var(--fg-3);display:flex;align-items:center;gap:.35rem}
.article-nav b{font-size:var(--fs-sm);font-weight:600;line-height:1.7}
.article-nav a.is-next{text-align:end}
.article-nav a.is-next span{justify-content:flex-end}
@media (max-width:640px){ .article-nav{grid-template-columns:minmax(0,1fr)} }

.cta-band{
  position:relative;overflow:hidden;border-radius:var(--r-xl);
  background:linear-gradient(120deg,var(--cobalt-700),var(--violet));
  color:#fff;padding:clamp(2.25rem,4.5vw,3.5rem);text-align:center;
}
.cta-band::after{
  content:"";position:absolute;inset-block-start:-40%;inset-inline-start:-10%;
  inline-size:60%;block-size:160%;background:radial-gradient(closest-side,rgba(255,255,255,.16),transparent 70%);
}
.cta-band > *{position:relative;z-index:1}
.cta-band h2{margin-block:.9rem;max-width:24ch;margin-inline:auto}
.cta-band p{color:rgba(255,255,255,.82);margin-inline:auto;max-width:52ch}
.cta-band .eyebrow{background:rgba(255,255,255,.16);color:#fff}
.cta-band__actions{display:flex;flex-wrap:wrap;gap:.7rem;justify-content:center;margin-block-start:1.8rem}
.cta-band .btn--primary{background:#fff;color:var(--cobalt-700);border-color:#fff}
.cta-band .btn--primary:hover{background:var(--paper)}
.cta-band .btn--ghost{background:transparent;color:#fff;border-color:rgba(255,255,255,.42)}
.cta-band .btn--ghost:hover{background:rgba(255,255,255,.12);border-color:#fff}

/* ============================= 10 COURSE ================================ */
.course-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:clamp(1rem,2vw,1.5rem)}
.course-card{
  position:relative;display:grid;grid-template-rows:auto 1fr;background:var(--surface);
  border:1px solid var(--line);border-radius:var(--r);overflow:hidden;block-size:100%;
  transition:border-color var(--d2) var(--ease),box-shadow var(--d2) var(--ease);
}
.course-card:hover{border-color:var(--slate-300);box-shadow:var(--sh-2)}
.course-card__media{position:relative;aspect-ratio:16/10;background:var(--ink-800)}
.course-card__media img{inline-size:100%;block-size:100%;object-fit:cover}
.course-card__cat{
  position:absolute;inset-block-start:.7rem;inset-inline-start:.7rem;
  padding:.25rem .6rem;border-radius:var(--r-pill);font-size:var(--fs-2xs);font-weight:600;
  background:rgba(255,255,255,.92);color:var(--ink-900);
}
.course-card__save{
  position:absolute;inset-block-start:.55rem;inset-inline-end:.55rem;
  inline-size:38px;block-size:38px;display:grid;place-items:center;border-radius:var(--r-pill);
  background:rgba(255,255,255,.92);color:var(--ink-700);
  transition:background-color var(--d1) var(--ease),color var(--d1) var(--ease);
}
.course-card__save:hover{background:#fff}
.course-card__save svg{inline-size:1.05rem;block-size:1.05rem}
.course-card__save[aria-pressed="true"]{background:var(--cobalt);color:#fff}
.course-card__save[aria-pressed="true"] svg{fill:currentColor}
.course-card__body{padding:1rem 1.15rem 1.25rem;display:grid;gap:.55rem;align-content:start}
.course-card h3{font-size:var(--fs-h4);line-height:1.65}
.course-card h3 a::before{content:"";position:absolute;inset:0;z-index:1}
.course-card__tutor{font-size:var(--fs-xs);color:var(--fg-2)}
.course-card__meta{
  display:flex;flex-wrap:wrap;gap:.35rem .85rem;font-size:var(--fs-2xs);color:var(--fg-3);
  margin-block-start:.15rem;
}
.course-card__meta span{display:inline-flex;align-items:center;gap:.3rem}
.course-card__meta svg{inline-size:.9em;block-size:.9em}
.course-card__foot{
  display:flex;align-items:center;justify-content:space-between;gap:.75rem;
  margin-block-start:auto;padding-block-start:.85rem;border-block-start:1px solid var(--line-soft);
}
.course-card__price{font-weight:700;font-size:var(--fs-sm);font-variant-numeric:tabular-nums}
.course-card__price small{font-weight:400;color:var(--fg-3);font-size:var(--fs-2xs)}
.course-card__price--free{color:var(--teal)}
.course-card .btn{position:relative;z-index:2}

.filters{display:grid;gap:1.25rem;align-content:start}
.filter-group{border-block-start:1px solid var(--line);padding-block-start:1.15rem}
.filter-group:first-child{border-block-start:0;padding-block-start:0}
.filter-group h3{font-size:var(--fs-xs);font-weight:700;margin-block-end:.75rem}
.filter-group ul{display:grid;gap:.15rem}
.filter-opt{
  display:flex;align-items:center;gap:.6rem;padding:.45rem .5rem;margin-inline:-.5rem;
  border-radius:var(--r-sm);cursor:pointer;font-size:var(--fs-sm);color:var(--fg-2);
  transition:background-color var(--d1) var(--ease);
}
.filter-opt:hover{background:var(--surface-2)}
.filter-opt input{
  appearance:none;flex:none;inline-size:20px;block-size:20px;border:1.5px solid var(--line);
  border-radius:6px;background:var(--field);position:relative;cursor:pointer;
}
.filter-opt input[type=radio]{border-radius:var(--r-pill)}
.filter-opt input:checked{background:var(--cobalt);border-color:var(--cobalt)}
.filter-opt input[type=checkbox]:checked::after{
  content:"";position:absolute;inset-block-start:3px;inset-inline-start:7px;
  inline-size:4px;block-size:9px;border:solid #fff;border-width:0 0 2px 2px;transform:rotate(-45deg);
}
.filter-opt input[type=radio]:checked::after{
  content:"";position:absolute;inset:5px;border-radius:var(--r-pill);background:#fff;
}
.filter-opt .n{margin-inline-start:auto;font-size:var(--fs-2xs);color:var(--fg-3);font-variant-numeric:tabular-nums}
.active-filters{display:flex;flex-wrap:wrap;gap:.45rem;align-items:center}

.cat-layout{display:grid;grid-template-columns:262px minmax(0,1fr);gap:clamp(1.5rem,3vw,2.5rem);align-items:start}
.cat-layout > aside{position:sticky;inset-block-start:calc(var(--header-h) + 1.25rem)}
#filters-toggle{display:none}
@media (max-width:1024px){
  .cat-layout{grid-template-columns:minmax(0,1fr)}
  .cat-layout > aside{position:static}
  #filters-toggle{display:inline-flex}
  #cat-filters{margin-block-start:1rem}
}

.toolbar{
  display:flex;align-items:center;gap:.75rem;flex-wrap:wrap;
  padding-block:1rem;border-block-end:1px solid var(--line);margin-block-end:1.5rem;
}
.toolbar__count{font-size:var(--fs-sm);color:var(--fg-2)}
.toolbar__count b{color:var(--fg)}
.toolbar .select{inline-size:auto;min-inline-size:190px;min-block-size:44px}

/* =========================== 11 CURRICULUM ============================== */
.curriculum{border:1px solid var(--line);border-radius:var(--r);overflow:hidden;background:var(--surface)}
.module + .module{border-block-start:1px solid var(--line)}
.module__btn{
  inline-size:100%;display:flex;align-items:center;gap:.85rem;
  padding:1.05rem 1.15rem;text-align:start;cursor:pointer;
  transition:background-color var(--d1) var(--ease);
}
.module__btn:hover{background:var(--surface-2)}
.module__idx{
  inline-size:30px;block-size:30px;flex:none;border-radius:var(--r-xs);display:grid;place-items:center;
  background:var(--surface-2);color:var(--fg-2);font-size:var(--fs-2xs);font-weight:700;
}
.module__t{flex:1;min-inline-size:0}
.module__t b{display:block;font-size:var(--fs-sm);font-weight:600}
.module__t span{font-size:var(--fs-2xs);color:var(--fg-3)}
.module__chev{inline-size:1.1rem;block-size:1.1rem;color:var(--fg-3);flex:none;transition:transform var(--d2) var(--ease)}
.module__btn[aria-expanded="true"] .module__chev{transform:rotate(180deg)}
.module__body{border-block-start:1px solid var(--line-soft);background:var(--surface-2)}
.lesson-row{
  display:flex;align-items:center;gap:.75rem;inline-size:100%;
  padding:.8rem 1.15rem .8rem 1.15rem;font-size:var(--fs-sm);color:var(--fg-2);text-align:start;
}
.lesson-row + .lesson-row{border-block-start:1px solid var(--line-soft)}
.lesson-row__mark{
  inline-size:22px;block-size:22px;flex:none;border-radius:var(--r-pill);
  border:1.5px solid var(--line);display:grid;place-items:center;color:transparent;
}
.lesson-row__mark svg{inline-size:.7rem;block-size:.7rem}
.lesson-row.is-done .lesson-row__mark{background:var(--teal);border-color:var(--teal);color:#fff}
.lesson-row__t{flex:1;min-inline-size:0}
.lesson-row__d{font-size:var(--fs-2xs);color:var(--fg-3);flex:none;font-variant-numeric:tabular-nums}
.lesson-row.is-free{color:var(--fg)}

/* ============================ 12 PROGRESS =============================== */
.bar{block-size:8px;border-radius:var(--r-pill);background:var(--line-soft);overflow:hidden}
.bar i{display:block;block-size:100%;border-radius:var(--r-pill);background:var(--cobalt);transition:inline-size var(--d3) var(--ease)}
.bar--sm{block-size:6px}
.bar--ok i{background:var(--teal)}
.bar--violet i{background:var(--violet)}
.bar-row{display:grid;gap:.45rem}
.bar-row__top{display:flex;align-items:baseline;justify-content:space-between;gap:.75rem;font-size:var(--fs-xs)}
.bar-row__top b{font-weight:600}
.bar-row__top span{color:var(--fg-3);font-variant-numeric:tabular-nums}

.ring{position:relative;inline-size:var(--sz,116px);block-size:var(--sz,116px);flex:none}
.ring svg{inline-size:100%;block-size:100%;transform:rotate(-90deg)}
.ring circle{fill:none;stroke-width:var(--sw,10);stroke-linecap:round}
.ring__track{stroke:var(--line-soft)}
.ring__val{stroke:var(--cobalt);transition:stroke-dashoffset var(--d3) var(--ease)}
.ring__label{
  position:absolute;inset:0;display:grid;place-content:center;text-align:center;
  font-variant-numeric:tabular-nums;
}
.ring__label b{display:block;font-size:1.35rem;font-weight:700;line-height:1.2}
.ring__label span{font-size:var(--fs-2xs);color:var(--fg-3)}

/* ============================ 13 OVERLAYS =============================== */
.modal{
  border:0;padding:0;background:transparent;
  max-inline-size:min(680px,94vw);inline-size:100%;
}
.modal::backdrop{background:rgba(16,19,26,.55);backdrop-filter:blur(2px)}
.modal__inner{
  background:var(--surface);border-radius:var(--r-lg);box-shadow:var(--sh-3);
  max-block-size:90dvh;overflow-y:auto;overscroll-behavior:contain;position:relative;
}
.modal__head{display:flex;align-items:flex-start;justify-content:space-between;gap:1rem;padding:1.35rem 1.5rem .5rem}
.modal__body{padding:.75rem 1.5rem 1.5rem}
.modal__foot{display:flex;gap:.6rem;justify-content:flex-end;padding:1rem 1.5rem 1.5rem;flex-wrap:wrap}
.modal--wide{max-inline-size:min(940px,96vw)}

.toast-stack{position:fixed;inset-block-end:1.25rem;inset-inline-end:1.25rem;z-index:var(--z-toast);display:grid;gap:.5rem;max-inline-size:min(380px,calc(100vw - 2.5rem))}
.toast{
  display:flex;align-items:flex-start;gap:.7rem;padding:.85rem 1rem;
  background:var(--ink-900);color:#fff;border-radius:var(--r-sm);box-shadow:var(--sh-3);
  font-size:var(--fs-sm);animation:toastIn var(--d3) var(--ease);
}
.toast svg{inline-size:1.05rem;block-size:1.05rem;flex:none;margin-block-start:.18rem;color:#7FE0C7}
.toast--err svg{color:#F3A0AC}
.toast.is-out{animation:toastOut var(--d2) var(--ease) forwards}
@keyframes toastIn{from{opacity:0;transform:translateY(10px)}to{opacity:1;transform:none}}
@keyframes toastOut{to{opacity:0;transform:translateY(6px)}}

.tip{position:relative}
.tip__bubble{
  position:absolute;inset-block-end:calc(100% + 8px);inset-inline-start:50%;transform:translateX(50%);
  background:var(--ink-900);color:#fff;font-size:var(--fs-2xs);padding:.35rem .6rem;border-radius:var(--r-xs);
  white-space:nowrap;opacity:0;pointer-events:none;transition:opacity var(--d1) var(--ease);
}
.tip:hover .tip__bubble,.tip:focus-visible .tip__bubble{opacity:1}

/* ==================== 14 MOTION / RESPONSIVE / A11Y ===================== */
.js .reveal{opacity:0;transform:translateY(14px)}
.js .reveal.is-in{
  opacity:1;transform:none;
  transition:opacity var(--d3) var(--ease) var(--delay,0ms),transform var(--d3) var(--ease) var(--delay,0ms);
}

@media (max-width:1180px){
  .course-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .cat-grid{grid-template-columns:repeat(3,minmax(0,1fr))}
}
@media (max-width:1024px){
  .header-nav{display:none}
  .menu-toggle{display:inline-grid}
  .hero__grid{grid-template-columns:minmax(0,1fr)}
  .hero__float--a,.hero__float--b{position:static;margin-block-start:.75rem;display:inline-flex}
  .split,.split--start,.split--end{grid-template-columns:minmax(0,1fr)}
  .g-4{grid-template-columns:repeat(2,minmax(0,1fr))}
  .step-list{grid-template-columns:minmax(0,1fr)}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .post-card--wide{grid-template-columns:minmax(0,1fr)}
  .post-card--wide .post-card__media{min-block-size:0;aspect-ratio:16/9}
}
@media (max-width:760px){
  .g-2,.g-3,.g-4{grid-template-columns:minmax(0,1fr)}
  .course-grid{grid-template-columns:minmax(0,1fr)}
  .cat-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-grid{grid-template-columns:minmax(0,1fr)}
  .toast-stack{inset-inline:1rem;max-inline-size:none}
  .toolbar{gap:.6rem}
  .toolbar .select{inline-size:100%;min-inline-size:0}
  .modal__foot{justify-content:stretch}
  .modal__foot .btn{flex:1}
}
@media (max-width:560px){
  .header-actions .btn--ghost{display:none}
}
@media (max-width:420px){
  .hero__actions .btn,.cta-band__actions .btn{inline-size:100%}
  .cat-grid{grid-template-columns:minmax(0,1fr)}
}
@media (min-width:1600px){ :root{--container:1320px} }

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation-duration:.01ms !important;animation-iteration-count:1 !important;transition-duration:.01ms !important}
  .js .reveal{opacity:1;transform:none}
}
@media print{
  .site-header,.site-footer,.drawer,.overlay,.toast-stack,.cta-band{display:none !important}
  body{background:#fff;color:#000}
}