/* ============================================================
   VIDYA — shared CSS for supporting pages
   (login, privacy, terms, contact)

   Design tokens + @font-face (Montserrat, local) live in
   colors_and_type.css, which every page links BEFORE this file.
   This sheet only carries shared components, and references the
   V2 tokens (graphite Ink ramp + Tiffany Tide accent) by variable.
   ============================================================ */
*,*::before,*::after{box-sizing:border-box}
html,body{margin:0;padding:0;background:var(--bg);color:var(--fg-2);font-family:var(--font-sans);font-size:16px;line-height:1.55;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}
a{color:inherit;text-decoration:none}
::selection{background:var(--tide-100);color:var(--ink-900)}

.wrap{max-width:1240px;margin:0 auto;padding:0 32px}
.wrap-narrow{max-width:760px;margin:0 auto;padding:0 32px}
@media (max-width:720px){.wrap,.wrap-narrow{padding:0 20px}}

/* nav (shared) */
.nav{position:sticky;top:0;z-index:50;background:rgba(246,250,249,.86);backdrop-filter:saturate(140%) blur(10px);-webkit-backdrop-filter:saturate(140%) blur(10px);border-bottom:1px solid var(--border)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:64px}
.brand{display:flex;align-items:center;gap:9px;color:var(--ink-900);text-decoration:none}
.brand-mark{height:25px;width:auto;display:block}
.brand-word{font-weight:600;font-size:17px;letter-spacing:.10em;color:var(--ink-900);text-transform:uppercase}
.nav-links{display:flex;align-items:center;gap:28px}
.nav-links a{position:relative;font-size:13px;color:var(--fg-2);font-weight:500;transition:color .18s var(--ease-out);padding:6px 0;text-decoration:none}
.nav-links a::after{content:"";position:absolute;left:0;right:0;bottom:-2px;height:1px;background:var(--accent-deep);transform:scaleX(0);transform-origin:left center;transition:transform .18s var(--ease-out)}
.nav-links a:hover{color:var(--ink-900)}
.nav-links a:hover::after{transform:scaleX(1)}
.nav-links a.active{color:var(--ink-900);font-weight:600}
.nav-links a.active::after{transform:scaleX(1)}
.nav-cta{display:flex;align-items:center;gap:14px}
.nav-cta .login{font-size:13px;color:var(--fg-2);font-weight:500}
@media (max-width:820px){.nav-links{display:none}}

/* buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:42px;padding:0 18px;border-radius:4px;border:1px solid transparent;cursor:pointer;font-family:inherit;font-size:11px;font-weight:700;letter-spacing:.10em;text-transform:uppercase;transition:background .18s var(--ease-out),box-shadow .18s var(--ease-out),color .18s var(--ease-out);text-decoration:none}
.btn-primary{background:var(--accent);color:var(--accent-ink);box-shadow:var(--shadow-1)}
.btn-primary:hover{background:var(--accent-deep);box-shadow:0 0 0 8px rgba(55,190,176,.14)}
.btn-secondary{background:transparent;color:var(--ink-700);border-color:var(--ink-200)}
.btn-secondary:hover{background:var(--ink-50)}
.btn-ghost{background:transparent;color:var(--ink-700)}
.btn-ghost:hover{background:var(--ink-50)}
.btn-sm{height:34px;padding:0 14px;font-size:10px}
.btn-lg{height:52px;padding:0 22px;font-size:12px}
.btn-block{width:100%}
.btn:focus-visible{outline:none;box-shadow:var(--shadow-focus)}

/* type */
.eyebrow{font-size:10px;font-weight:700;letter-spacing:var(--track-eyebrow);text-transform:uppercase;color:var(--fg-4);font-feature-settings:"tnum" on}
.eyebrow.accent{color:var(--accent-text)}
/* square-bullet eyebrow — the V3 section signature */
.eyebrow-sq{display:inline-flex;align-items:center;gap:10px;font-size:10px;font-weight:700;letter-spacing:var(--track-meta);text-transform:uppercase;color:var(--accent-text);font-feature-settings:"tnum" on}
.eyebrow-sq::before{content:"";width:6px;height:6px;background:currentColor;flex-shrink:0}
.eyebrow-sq.on-dark{color:var(--accent-text-dark)}
h1,h2,h3,h4{margin:0;color:var(--fg-1);text-wrap:balance;font-family:inherit}
.h-display{font-weight:200;font-size:clamp(40px,5.5vw,72px);line-height:1.04;letter-spacing:var(--track-display)}
.h-display em{font-style:italic;font-weight:300;color:var(--fg-3)}
.h2{font-weight:600;font-size:clamp(22px,2.4vw,30px);line-height:1.2;letter-spacing:-.01em}
.h3{font-weight:600;font-size:18px;line-height:1.3;letter-spacing:-.005em}
.lead{font-size:18px;line-height:1.55;color:var(--fg-3);max-width:600px;text-wrap:pretty}
p{margin:0 0 16px;color:var(--fg-3);text-wrap:pretty}

/* form fields */
.field{display:flex;flex-direction:column;gap:6px;margin-bottom:18px}
.field label{font-size:10px;font-weight:700;letter-spacing:.14em;text-transform:uppercase;color:var(--fg-4)}
.field input,.field textarea,.field select{font-family:inherit;font-size:15px;color:var(--ink-900);background:var(--white);border:1px solid var(--ink-200);border-radius:4px;padding:12px 14px;outline:none;transition:border-color .15s var(--ease-out),box-shadow .15s var(--ease-out);resize:vertical}
.field input::placeholder,.field textarea::placeholder{color:var(--ink-300)}
.field input:focus,.field textarea:focus,.field select:focus{border-color:var(--accent-deep);box-shadow:var(--shadow-focus)}
.field-error{font-size:11px;color:var(--signal-error);letter-spacing:.02em;display:none}
.field.has-error input,.field.has-error textarea{border-color:var(--signal-error)}
.field.has-error .field-error{display:block}

/* footer (shared, slim) */
footer{background:var(--paper);border-top:1px solid var(--border);padding:48px 0 28px;margin-top:80px}
.foot-inner{display:flex;justify-content:space-between;align-items:center;gap:24px;flex-wrap:wrap}
.foot-inner .brand-word{font-size:14px}
.foot-meta{font-size:11px;letter-spacing:.04em;color:var(--fg-4)}
.foot-links{display:flex;gap:24px;flex-wrap:wrap}
.foot-links a{font-size:12px;color:var(--fg-3);transition:color .15s var(--ease-out)}
.foot-links a:hover{color:var(--ink-900)}

/* fade-up — 12px/600ms/80ms stagger */
.fade-up{opacity:0;transform:translateY(12px);animation:fadeup .6s var(--ease-out) forwards}
.fade-up.d1{animation-delay:.08s}.fade-up.d2{animation-delay:.16s}.fade-up.d3{animation-delay:.24s}.fade-up.d4{animation-delay:.32s}
@keyframes fadeup{to{opacity:1;transform:translateY(0)}}

/* nav stagger on initial paint */
.nav-links a,.nav-cta>*{opacity:0;transform:translateY(12px);animation:fadeup .6s var(--ease-out) both}
.nav-links a:nth-child(1){animation-delay:.10s}
.nav-links a:nth-child(2){animation-delay:.15s}
.nav-links a:nth-child(3){animation-delay:.20s}
.nav-links a:nth-child(4){animation-delay:.25s}
.nav-cta>*:nth-child(1){animation-delay:.30s}
.nav-cta>*:nth-child(2){animation-delay:.35s}

/* below-fold reveal */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .6s var(--ease-out),transform .6s var(--ease-out)}
.reveal.is-in{opacity:1;transform:none}

/* scroll progress bar */
.scroll-progress{position:fixed;top:0;left:0;height:2px;background:var(--accent-deep);width:0;z-index:100;pointer-events:none;transition:width .1s linear}

@media (prefers-reduced-motion:reduce){
  .fade-up,.nav-links a,.nav-cta>*,.reveal,.node,.link-line,.halo,.tag-float{animation:none!important;transition:none!important}
  .fade-up,.nav-links a,.nav-cta>*,.reveal{opacity:1;transform:none}
  .scroll-progress{display:none}
}

/* page header — generic */
.page-head{padding:80px 0 56px;border-bottom:1px solid var(--border)}
.page-head .eyebrow{margin-bottom:18px}
.page-head h1{margin-bottom:20px}
.page-head .lead{margin:0}

/* prose (privacy/terms) */
.prose{padding:64px 0 96px}
.prose section{padding:0;margin-bottom:48px}
.prose section:last-child{margin-bottom:0}
.prose h2{margin-bottom:14px}
.prose p,.prose li{font-size:15px;line-height:1.7;color:var(--fg-2)}
.prose ul,.prose ol{margin:0 0 16px;padding-left:22px}
.prose li{margin-bottom:8px}
.prose hr{border:0;border-top:1px solid var(--border);margin:32px 0}

.toc{background:var(--white);border:1px solid var(--border);border-radius:8px;padding:24px 28px;margin-bottom:48px}
.toc-eye{font-size:10px;font-weight:700;letter-spacing:var(--track-eyebrow);text-transform:uppercase;color:var(--fg-4);margin-bottom:12px}
.toc ol{margin:0;padding-left:18px;display:grid;grid-template-columns:1fr 1fr;gap:8px 24px}
@media (max-width:600px){.toc ol{grid-template-columns:1fr}}
.toc li{font-size:13.5px;line-height:1.5;color:var(--fg-2)}
.toc a{color:var(--fg-2);border-bottom:1px solid transparent;transition:color .15s var(--ease-out),border-color .15s var(--ease-out)}
.toc a:hover{color:var(--accent-deep);border-color:var(--tide-300)}