/*
 * styles.css — apex landing for "The Professor"
 *
 * Shares the app's warm-academic design-token system (oxblood / gold / cream /
 * Georgia-serif) so the public landing and the gated app at auth.* match.
 * Token names + values mirror web-app-cf/src/styles/tokens.css (the canonical
 * source) for the subset this page uses, plus light + dark + reduced-motion.
 *
 * Served as an external stylesheet so the CSP can stay `style-src 'self'`
 * (no inline-style hash to maintain). The page has zero JS (`script-src 'none'`).
 *
 * Theme strategy: the hero / closing / footer are FIXED dark oxblood in both
 * themes (like the app's sidebar). Body surfaces, bands, cards and text flip
 * with prefers-color-scheme. The primary button keeps a fixed deep-oxblood
 * background + white text so contrast holds in light AND dark; links use the
 * theme-switched accent so they stay readable on a dark background.
 */

/* ═══ LIGHT THEME (default) ═══ */
:root{
  --bg:#f5f1ea; --surface:#fff; --surface-2:#faf7f1; --ink:#2a241d; --ink-soft:#5b5347; --line:#e4ddd1;

  /* accent = links / interactive text (theme-switched for dark readability) */
  --accent:#6b2737; --accent-soft:#8a3a4b;
  /* brand = primary-button background (FIXED both themes; pairs with white text) */
  --brand:#6b2737; --brand-soft:#8a3a4b;
  --deep:#5e1a26;                       /* hero/closing gradient anchor — fixed */

  --gold:#b0852f; --gold-soft:#c79a52; --gold-ink:#856017;
  --green:#3f7d54; --cream:#f3e6c8;

  --shadow:0 1px 3px rgba(40,35,29,.08),0 6px 20px rgba(40,35,29,.06);
  --shadow-lg:0 10px 40px rgba(40,35,29,.14);
  --maxw:1080px;

  /* surface helpers that must flip in dark */
  --topbar-bg:rgba(245,241,234,.92);
  --mk-bg:#faf3e7; --mk-line:#efe1c4;   /* reason marker chip */
  --ghost-hover:#f3e3e6; --cream-hover:#efe0ba;
}

/* ═══ DARK THEME — follows the OS (no toggle: the page has no JS) ═══ */
@media (prefers-color-scheme: dark){
  :root{
    --bg:#1a1512; --surface:#241c1a; --surface-2:#2c221f; --ink:#f0e8dd; --ink-soft:#bcae9f; --line:#3a2c28;
    --accent:#c87d8c; --accent-soft:#d99aa6;     /* readable dusty-rose on dark */
    --gold:#c8a050; --gold-soft:#d8b56a; --gold-ink:#c8a050;
    --green:#5fa074;
    --shadow:0 1px 3px rgba(0,0,0,.4),0 6px 20px rgba(0,0,0,.3);
    --shadow-lg:0 12px 40px rgba(0,0,0,.5);
    --topbar-bg:rgba(26,21,18,.92);
    --mk-bg:#2a2018; --mk-line:#5a4020;
    --ghost-hover:#332024; --cream-hover:#efe0ba;
    /* --brand / --brand-soft / --deep / --cream stay fixed (brand surfaces) */
  }
}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
html,body{margin:0}
body{
  background:var(--bg);color:var(--ink);
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  line-height:1.6;-webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4{font-family:Georgia,"Times New Roman",serif;font-weight:600;line-height:1.2;margin:0}
a{color:var(--accent)}
img,svg{max-width:100%}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 20px}

/* skip link for keyboard users */
.skip{position:absolute;left:-9999px;top:0;background:var(--brand);color:#fff;padding:10px 16px;border-radius:0 0 10px 0;z-index:200}
.skip:focus{left:0}

/* visible keyboard focus ring — two-tone so it clears 3:1 on both cream and oxblood */
a:focus-visible,.btn:focus-visible{outline:2px solid #f5e9d0;outline-offset:2px;
  box-shadow:0 0 0 4px #2a241d;border-radius:6px}

/* ── top bar ── */
.topbar{position:sticky;top:0;z-index:100;background:var(--topbar-bg);
  backdrop-filter:saturate(140%) blur(8px);-webkit-backdrop-filter:saturate(140%) blur(8px);
  border-bottom:1px solid var(--line)}
.topbar .wrap{display:flex;align-items:center;gap:12px;min-height:64px}
.brand{display:flex;align-items:center;gap:11px;text-decoration:none;color:var(--ink);min-width:0}
.brand .seal{width:40px;height:40px;border-radius:50%;
  background:radial-gradient(circle at 30% 30%,#8a3a4b,#5a2030);
  display:flex;align-items:center;justify-content:center;border:1.5px solid var(--gold);flex-shrink:0;
  box-shadow:0 1px 2px rgba(0,0,0,.18)}
.brand .seal svg{width:26px;height:26px;display:block}
.brand .wm{font-family:Georgia,serif;font-size:18px;font-weight:600;line-height:1.1;color:var(--ink)}
.brand .wm small{display:block;font-family:-apple-system,sans-serif;font-size:11px;letter-spacing:.04em;
  text-transform:uppercase;color:var(--ink-soft);font-weight:600}
.topbar .brand{margin-right:auto}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;
  text-decoration:none;font-family:inherit;font-weight:600;font-size:15px;
  padding:11px 20px;border-radius:10px;min-height:44px;cursor:pointer;
  transition:background .15s,transform .05s,box-shadow .15s;border:1.5px solid transparent}
.btn:active{transform:translateY(1px)}
.btn-primary{background:var(--brand);color:#fff;box-shadow:0 2px 6px rgba(107,39,55,.25)}
.btn-primary:hover{background:var(--brand-soft)}
.btn-ghost{background:transparent;color:var(--accent);border-color:var(--accent)}
.btn-ghost:hover{background:var(--ghost-hover)}
.btn-cream{background:var(--cream);color:var(--deep);border-color:rgba(176,133,47,.5)}
.btn-cream:hover{background:var(--cream-hover)}
.topbar .btn{padding:9px 18px;font-size:14.5px;min-height:42px}

/* ── hero (fixed dark oxblood + tartan, both themes) ── */
.hero{position:relative;overflow:hidden;color:#f4e9da;
  background:linear-gradient(135deg,#6b2737 0%,#5e1a26 55%,#3f1822 100%)}
.hero::before{content:"";position:absolute;inset:0;pointer-events:none;opacity:.5;
  background-image:
    repeating-linear-gradient(90deg, rgba(20,8,12,.45) 0 13px, transparent 13px 44px),
    repeating-linear-gradient(0deg,  rgba(20,8,12,.45) 0 13px, transparent 13px 44px),
    repeating-linear-gradient(90deg, rgba(20,8,12,.55) 22px 33px, transparent 33px 44px),
    repeating-linear-gradient(0deg,  rgba(20,8,12,.55) 22px 33px, transparent 33px 44px),
    repeating-linear-gradient(90deg, transparent 0 38px, rgba(216,201,163,.5) 38px 40px, transparent 40px 44px),
    repeating-linear-gradient(0deg,  transparent 0 38px, rgba(216,201,163,.5) 38px 40px, transparent 40px 44px),
    repeating-linear-gradient(45deg, rgba(255,255,255,.05) 0 1px, transparent 1px 3px);}
.hero .wrap{position:relative;padding:64px 20px 72px;max-width:880px}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:12px;letter-spacing:.08em;
  text-transform:uppercase;color:var(--cream);font-weight:700;
  background:rgba(243,230,200,.12);border:1px solid rgba(243,230,200,.3);
  padding:6px 13px;border-radius:30px;margin-bottom:20px}
.hero h1{color:#fff;font-size:clamp(30px,6vw,52px);letter-spacing:-.01em;margin-bottom:18px;text-wrap:balance}
.hero .sub{font-size:clamp(16px,2.4vw,20px);color:#ecdcc8;max-width:64ch;margin:0 0 28px}
.hero .cta-row{display:flex;flex-wrap:wrap;gap:14px;align-items:center}
.hero .cta-note{font-size:13.5px;color:#d7c1ad;max-width:46ch}

/* ── generic section ── */
section.band{padding:64px 0}
section.band.alt{background:var(--surface-2);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.section-head{max-width:62ch;margin:0 auto 40px;text-align:center}
.section-head h2{font-size:clamp(24px,4vw,34px);margin-bottom:12px}
.section-head p{font-size:17px;color:var(--ink-soft);margin:0}
.kicker{display:inline-block;font-size:12px;letter-spacing:.08em;text-transform:uppercase;
  color:var(--gold-ink);font-weight:700;margin-bottom:12px}

/* ── why-it-helps list ── */
.reasons{display:grid;grid-template-columns:1fr;gap:14px;max-width:860px;margin:0 auto}
.reason{display:flex;gap:14px;align-items:flex-start;background:var(--surface);
  border:1px solid var(--line);border-left:4px solid var(--gold);border-radius:12px;
  padding:16px 18px;box-shadow:var(--shadow)}
.reason .mk{flex-shrink:0;width:30px;height:30px;border-radius:50%;
  background:var(--mk-bg);border:1px solid var(--mk-line);color:var(--gold-ink);font-weight:700;
  display:flex;align-items:center;justify-content:center;font-size:15px;margin-top:1px}
.reason p{margin:0;font-size:15.5px}
.reason b{color:var(--ink)}

/* ── capability cards ── */
.cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:18px}
.card{background:var(--surface);border:1px solid var(--line);border-radius:14px;
  padding:22px;box-shadow:var(--shadow);transition:transform .15s,box-shadow .15s;position:relative;overflow:hidden}
.card::before{content:"";position:absolute;top:0;left:0;right:0;height:3px;
  background:linear-gradient(90deg,var(--accent),var(--gold-soft))}
.card:hover{transform:translateY(-3px);box-shadow:var(--shadow-lg)}
.card h3{font-size:18px;margin-bottom:9px;color:var(--accent)}
.card p{margin:0;font-size:15px;color:var(--ink-soft)}

/* ── how it works ── */
.steps{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:20px;counter-reset:step}
.step{background:var(--surface);border:1px solid var(--line);border-radius:14px;padding:22px;
  box-shadow:var(--shadow);position:relative}
.step .num{display:inline-flex;align-items:center;justify-content:center;
  width:40px;height:40px;border-radius:50%;
  background:radial-gradient(circle at 30% 30%,#8a3a4b,#5a2030);color:var(--cream);
  border:1.5px solid var(--gold);font-family:Georgia,serif;font-size:18px;font-weight:600;margin-bottom:14px}
.step h3{font-size:17px;margin-bottom:8px}
.step p{margin:0;font-size:15px;color:var(--ink-soft)}

/* ── audience ── */
.audience{max-width:760px;margin:0 auto;text-align:center}
.audience .quote{font-family:Georgia,serif;font-size:clamp(20px,3.4vw,26px);line-height:1.4;
  color:var(--ink);font-style:italic;margin:0}
.audience .quote::before{content:"\201C";color:var(--gold);font-size:1.2em;line-height:0;vertical-align:-.15em;margin-right:.06em}
.audience .quote::after{content:"\201D";color:var(--gold);font-size:1.2em;line-height:0;vertical-align:-.35em;margin-left:.02em}

/* ── closing CTA (fixed dark, both themes) ── */
.closing{position:relative;overflow:hidden;color:#f4e9da;text-align:center;
  background:linear-gradient(135deg,#5e1a26,#3f1822)}
.closing::before{content:"";position:absolute;inset:0;pointer-events:none;opacity:.4;
  background-image:
    repeating-linear-gradient(90deg, rgba(20,8,12,.45) 0 13px, transparent 13px 44px),
    repeating-linear-gradient(0deg,  rgba(20,8,12,.45) 0 13px, transparent 13px 44px),
    repeating-linear-gradient(90deg, transparent 0 38px, rgba(216,201,163,.5) 38px 40px, transparent 40px 44px),
    repeating-linear-gradient(0deg,  transparent 0 38px, rgba(216,201,163,.5) 38px 40px, transparent 40px 44px);}
.closing .wrap{position:relative;padding:68px 20px;max-width:720px}
.closing h2{color:#fff;font-size:clamp(24px,4vw,34px);margin-bottom:16px;text-wrap:balance}
.closing p{font-size:17px;color:#ecdcc8;margin:0 auto 28px;max-width:56ch}

/* ── footer (fixed dark, both themes) ── */
footer{background:#241c1a;color:#cdbdad;padding:32px 0}
footer .wrap{display:flex;flex-wrap:wrap;gap:16px;align-items:center;justify-content:space-between}
footer .fbrand{display:flex;align-items:center;gap:10px;font-family:Georgia,serif;color:#f3e7d6;font-size:15px}
footer .fbrand .seal{width:30px;height:30px;border-radius:50%;
  background:radial-gradient(circle at 30% 30%,#8a3a4b,#5a2030);border:1.5px solid var(--gold);
  display:flex;align-items:center;justify-content:center;flex-shrink:0}
footer .fbrand .seal svg{width:20px;height:20px;display:block}
footer a{color:#e7c9a8}
footer .flinks{display:flex;flex-wrap:wrap;gap:18px;font-size:13.5px}
footer .copy{width:100%;font-size:12px;color:#9a8a7a;border-top:1px solid #3a2c28;padding-top:16px;margin-top:4px}

/* reduced motion */
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto}
  .card:hover{transform:none}
}
@media (max-width:560px){
  .topbar .brand .wm small{display:none}
  .hero .wrap{padding:48px 20px 56px}
  section.band{padding:48px 0}
  .btn{width:100%}
  .hero .cta-row .btn{width:100%}
  footer .wrap{flex-direction:column;align-items:flex-start}
}