/* ===== The AI Café — styles ===== */
:root {
  --espresso: #2a1a12;
  --cocoa:    #4a3326;
  --coffee:   #6f4e37;
  --caramel:  #b07c4f;
  --latte:    #c9a27a;
  --foam:     #f4e9da;
  --cream:    #fbf5ec;
  --paper:    #fffaf3;
  --gold:     #d99a2b;
  --shadow:   rgba(42, 26, 18, 0.14);

  --bg1: #fbeede;
  --bg2: #f3e3cf;
  --bg-base: #fbf5ec;
  --card-bg: #fffaf3;
  --card-border: rgba(176,124,79,.18);
  --text: #2a1a12;
  --text-soft: #4a3326;
  --nav-bg: rgba(251, 245, 236, 0.72);
  --grain-op: .035;

  --maxw: 1120px;
  --serif: "Fraunces", Georgia, serif;
  --sans: "Inter", system-ui, sans-serif;
}

/* ===== EVENING CAFÉ (dark) ===== */
[data-theme="night"] {
  --espresso: #f4e9da;
  --cocoa:    #e6d4bf;
  --coffee:   #e0b074;
  --caramel:  #d99a5b;
  --latte:    #8a6a4a;
  --foam:     #1c130d;
  --cream:    #160f0a;
  --paper:    #221710;
  --gold:     #f0b54a;
  --shadow:   rgba(0, 0, 0, 0.5);

  --bg1: #2a1c10;
  --bg2: #1a110a;
  --bg-base: #140d08;
  --card-bg: #211710;
  --card-border: rgba(224,176,116,.16);
  --text: #f4e9da;
  --text-soft: #d3bfa6;
  --nav-bg: rgba(20, 13, 8, 0.78);
  --grain-op: .05;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }

body {
  font-family: var(--sans);
  color: var(--text);
  background:
    radial-gradient(1200px 600px at 80% -10%, var(--bg1) 0%, transparent 60%),
    radial-gradient(900px 500px at -10% 20%, var(--bg2) 0%, transparent 55%),
    var(--bg-base);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  transition: background-color .5s ease, color .5s ease;
}

/* subtle paper grain over everything */
body::after {
  content: ""; position: fixed; inset: 0; z-index: 0; pointer-events: none;
  opacity: var(--grain-op);
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.8' numOctaves='3'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

h1, h2, h3 { font-family: var(--serif); line-height: 1.1; font-weight: 600; }

.eyebrow {
  font-family: var(--sans);
  text-transform: uppercase;
  letter-spacing: 0.22em;
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--caramel);
  margin-bottom: 0.9rem;
  display: inline-flex; align-items: center; gap: 0.5rem;
}
.open-dot { width: 8px; height: 8px; border-radius: 50%; background: #4caf72; box-shadow: 0 0 0 0 rgba(76,175,114,.6); animation: pulse 2.2s infinite; }
@keyframes pulse { 0%{box-shadow:0 0 0 0 rgba(76,175,114,.55)} 70%{box-shadow:0 0 0 8px rgba(76,175,114,0)} 100%{box-shadow:0 0 0 0 rgba(76,175,114,0)} }

.hl { color: var(--coffee); font-weight: 600; background: linear-gradient(transparent 60%, rgba(217,154,43,.32) 60%); }
.dot { color: var(--gold); }
.grad { background: linear-gradient(100deg, var(--caramel), var(--gold) 55%, var(--coffee)); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; }

/* ===== reading progress ===== */
.progress { position: fixed; top: 0; left: 0; height: 3px; width: 0; z-index: 60; background: linear-gradient(90deg, var(--caramel), var(--gold)); box-shadow: 0 0 12px rgba(217,154,43,.6); transition: width .1s linear; }

.steam-field { position: fixed; inset: 0; pointer-events: none; z-index: 0; }

/* ===== NAV ===== */
.nav {
  position: sticky; top: 0; z-index: 50;
  display: flex; align-items: center; justify-content: space-between;
  padding: 1rem clamp(1.2rem, 4vw, 3rem);
  backdrop-filter: blur(12px) saturate(1.2);
  background: var(--nav-bg);
  border-bottom: 1px solid var(--card-border);
  transition: box-shadow .3s, background .5s;
}
.nav.scrolled { box-shadow: 0 6px 24px var(--shadow); }
.brand { display: flex; align-items: center; gap: 0.55rem; text-decoration: none; color: var(--text); font-family: var(--serif); font-weight: 700; font-size: 1.25rem; }
.brand .cup { font-size: 1.4rem; transition: transform .4s; }
.brand:hover .cup { transform: rotate(-12deg) scale(1.12); }
.nav-links { display: flex; align-items: center; gap: 1.4rem; }
.nav-links a { text-decoration: none; color: var(--text-soft); font-weight: 500; font-size: 0.95rem; transition: color .2s; position: relative; }
.nav-links a:not(.nav-cta)::after { content:""; position:absolute; left:0; bottom:-4px; height:2px; width:0; background:var(--gold); transition:width .25s; }
.nav-links a:not(.nav-cta):hover::after { width:100%; }
.nav-links a:hover { color: var(--gold); }
.nav-cta { background: var(--espresso); color: var(--foam) !important; padding: 0.55rem 1.1rem; border-radius: 999px; font-size: 0.88rem !important; transition: background .25s, transform .15s; }
.nav-cta:hover { background: var(--coffee); transform: translateY(-1px); }
.theme-toggle { background: transparent; border: 1.5px solid var(--card-border); width: 38px; height: 38px; border-radius: 50%; cursor: pointer; font-size: 1rem; display: grid; place-items: center; transition: transform .3s, border-color .2s, background .2s; }
.theme-toggle:hover { transform: rotate(20deg); border-color: var(--caramel); }
.tt-icon { line-height: 1; }

/* ===== buttons ===== */
.btn { display: inline-block; text-decoration: none; font-weight: 600; border-radius: 999px; padding: 0.85rem 1.6rem; transition: transform .15s, box-shadow .25s, background .25s; cursor: pointer; border: none; font-size: 1rem; font-family: var(--sans); }
.btn-primary { background: var(--espresso); color: var(--foam); box-shadow: 0 10px 24px rgba(42,26,18,.25); }
.btn-primary:hover { transform: translateY(-2px); background: var(--coffee); box-shadow: 0 14px 30px rgba(42,26,18,.32); }
.btn-ghost { background: transparent; color: var(--text-soft); border: 1.5px solid var(--latte); }
.btn-ghost:hover { transform: translateY(-2px); border-color: var(--caramel); color: var(--text); }

/* ===== HERO ===== */
.hero { position: relative; z-index: 1; max-width: var(--maxw); margin: 0 auto; display: grid; grid-template-columns: 1.2fr 0.8fr; align-items: center; gap: 2rem; padding: clamp(3rem, 8vw, 6rem) clamp(1.2rem, 4vw, 3rem) clamp(4rem, 9vw, 7rem); }
.hero-glow { position: absolute; inset: -10% 30% 30% -10%; background: radial-gradient(circle at 30% 40%, rgba(217,154,43,.18), transparent 60%); filter: blur(20px); z-index: -1; pointer-events: none; }
.hero h1 { font-size: clamp(2.6rem, 6.5vw, 4.8rem); letter-spacing: -0.02em; margin-bottom: 1.3rem; }
.hero .lede { font-size: clamp(1.05rem, 2vw, 1.25rem); color: var(--text-soft); max-width: 32ch; margin-bottom: 2rem; }
.hero-actions { display: flex; gap: 0.9rem; flex-wrap: wrap; }
.hero-foot { margin-top: 1.6rem; font-size: 0.9rem; color: var(--caramel); }

/* cup illustration */
.hero-cup { position: relative; display: flex; flex-direction: column; align-items: center; justify-content: center; min-height: 340px; }
.cup-glow { position: absolute; width: 280px; height: 280px; border-radius: 50%; background: radial-gradient(circle, rgba(217,154,43,.22), transparent 65%); filter: blur(10px); animation: breathe 6s ease-in-out infinite; }
@keyframes breathe { 0%,100%{transform:scale(1);opacity:.8} 50%{transform:scale(1.12);opacity:1} }
.mug { position: relative; width: 200px; height: 170px; animation: floaty 6s ease-in-out infinite; }
@keyframes floaty { 0%,100%{transform:translateY(0)} 50%{transform:translateY(-10px)} }
.mug-body { position: absolute; inset: 0; width: 180px; height: 160px; background: linear-gradient(160deg, var(--paper) 0%, var(--bg2) 100%); border-radius: 18px 18px 70px 70px; box-shadow: inset 0 -10px 20px rgba(176,124,79,.18), 0 20px 40px var(--shadow); border: 3px solid var(--card-bg); }
.coffee { position: absolute; top: 16px; left: 16px; width: 148px; height: 46px; background: radial-gradient(ellipse at 50% 30%, #7a5638, #3a2417); border-radius: 50%; box-shadow: inset 0 4px 10px rgba(0,0,0,.3); }
.mug-handle { position: absolute; right: -34px; top: 38px; width: 56px; height: 72px; border: 14px solid var(--bg2); border-left: none; border-radius: 0 40px 40px 0; }
.saucer { position: absolute; bottom: 34px; width: 240px; height: 30px; background: linear-gradient(var(--card-bg), var(--bg2)); border-radius: 50%; box-shadow: 0 16px 30px var(--shadow); }
.mug .s { position: absolute; bottom: 150px; width: 10px; height: 60px; background: linear-gradient(to top, rgba(255,255,255,0), rgba(255,255,255,.85)); border-radius: 50%; filter: blur(3px); opacity: 0; animation: rise 4s ease-in-out infinite; }
[data-theme="night"] .mug .s { background: linear-gradient(to top, rgba(224,176,116,0), rgba(224,176,116,.6)); }
.mug .s1 { left: 50px; animation-delay: 0s; }
.mug .s2 { left: 90px; animation-delay: 1.1s; }
.mug .s3 { left: 130px; animation-delay: 2.2s; }
@keyframes rise { 0%{opacity:0;transform:translateY(10px) scaleX(1)} 25%{opacity:.8} 60%{opacity:.5;transform:translateY(-40px) scaleX(1.6)} 100%{opacity:0;transform:translateY(-80px) scaleX(2.2)} }

/* scroll hint */
.scroll-hint { position: absolute; bottom: 1.4rem; left: 50%; transform: translateX(-50%); width: 26px; height: 42px; border: 2px solid var(--latte); border-radius: 14px; display: grid; place-items: start center; padding-top: 7px; opacity: .7; transition: opacity .2s; }
.scroll-hint:hover { opacity: 1; }
.scroll-hint span { width: 5px; height: 8px; border-radius: 3px; background: var(--caramel); animation: scrolldot 1.6s ease-in-out infinite; }
@keyframes scrolldot { 0%{transform:translateY(0);opacity:1} 70%{transform:translateY(14px);opacity:0} 100%{opacity:0} }

/* ===== STATS ===== */
.stats { position: relative; z-index: 1; max-width: var(--maxw); margin: 0 auto; display: grid; grid-template-columns: repeat(4,1fr); gap: 1rem; padding: 0 clamp(1.2rem,4vw,3rem) clamp(2rem,5vw,3.5rem); }
.stat { text-align: center; padding: 1.3rem 0.6rem; background: var(--card-bg); border: 1px solid var(--card-border); border-radius: 18px; box-shadow: 0 6px 16px rgba(42,26,18,.05); }
.stat-num { display: block; font-family: var(--serif); font-weight: 700; font-size: clamp(1.8rem,4vw,2.6rem); color: var(--coffee); line-height: 1; }
.stat-label { display: block; margin-top: .4rem; font-size: 0.82rem; color: var(--text-soft); letter-spacing: .02em; }

/* ===== section heads ===== */
.section-head { text-align: center; max-width: 640px; margin: 0 auto clamp(2rem,5vw,3.5rem); }
.section-head h2 { font-size: clamp(1.9rem, 4vw, 2.8rem); letter-spacing: -0.01em; }
.section-head .sub { color: var(--text-soft); margin-top: 0.9rem; font-size: 1.05rem; }

/* ===== MENU ===== */
.menu { position: relative; z-index: 1; max-width: var(--maxw); margin: 0 auto; padding: clamp(3rem,7vw,5rem) clamp(1.2rem,4vw,3rem); }
.menu-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 1.2rem; }
.menu-card { display: block; text-decoration: none; color: inherit; background: var(--card-bg); border: 1px solid var(--card-border); border-radius: 20px; padding: 1.6rem 1.5rem; box-shadow: 0 6px 18px rgba(42,26,18,.06); transition: transform .25s cubic-bezier(.2,.8,.2,1), box-shadow .25s, border-color .2s; position: relative; overflow: hidden; transform-style: preserve-3d; }
.menu-card::before { content: ""; position: absolute; left: 0; top: 0; height: 100%; width: 4px; background: linear-gradient(var(--caramel), var(--gold)); transform: scaleY(0); transform-origin: top; transition: transform .25s; }
.menu-card::after { content: ""; position: absolute; inset: 0; background: radial-gradient(420px circle at var(--mx,50%) var(--my,50%), rgba(217,154,43,.12), transparent 45%); opacity: 0; transition: opacity .3s; pointer-events: none; }
.menu-card:hover { box-shadow: 0 20px 40px rgba(42,26,18,.16); border-color: var(--caramel); }
.menu-card:hover::before { transform: scaleY(1); }
.menu-card:hover::after { opacity: 1; }
.menu-card .price { font-family: var(--serif); font-style: italic; color: var(--gold); font-size: 0.9rem; }
.menu-card h3 { font-size: 1.4rem; margin: 0.5rem 0 0.6rem; }
.menu-card h3 em { color: var(--coffee); }
.menu-card p { color: var(--text-soft); font-size: 0.97rem; }

/* ===== STORIES ===== */
.stories { position: relative; z-index: 1; max-width: 760px; margin: 0 auto; padding: clamp(2rem,5vw,4rem) clamp(1.2rem,4vw,2rem) clamp(3rem,7vw,5rem); }
.chapter-intro { text-align: center; margin-bottom: clamp(2.5rem,6vw,4rem); }
.chapter-intro h2 { font-size: clamp(1.8rem,4vw,2.6rem); max-width: 18ch; margin: 0 auto; }
.story { display: grid; grid-template-columns: 84px 1fr; gap: 1.2rem; padding: clamp(2rem,5vw,3.2rem) 0; border-bottom: 1px dashed var(--card-border); }
.story-num { font-family: var(--serif); font-size: 2.6rem; font-weight: 700; background: linear-gradient(var(--latte), var(--caramel)); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; line-height: 1; }
.story-body h3 { font-size: clamp(1.5rem, 3.4vw, 2.1rem); margin-bottom: 1.1rem; color: var(--text); }
.story-body p { color: var(--text-soft); margin-bottom: 1.1rem; font-size: 1.08rem; }
.story-body p strong { color: var(--text); }
.dropcap::first-letter { font-family: var(--serif); font-size: 3.4rem; font-weight: 700; float: left; line-height: 0.8; padding: 0.1em 0.12em 0 0; color: var(--coffee); }
blockquote { font-family: var(--serif); font-style: italic; font-size: 1.2rem; color: var(--coffee); border-left: 4px solid var(--gold); padding: 0.4rem 0 0.4rem 1.4rem; margin: 1.6rem 0; }
.callout { background: linear-gradient(135deg, var(--bg1), var(--bg2)); border: 1px solid var(--card-border); border-radius: 16px; padding: 1.2rem 1.3rem; font-size: 1rem; color: var(--text-soft); }
.callout-do { background: linear-gradient(135deg, rgba(120,160,80,.16), rgba(120,160,80,.08)); border-color: rgba(120,150,80,.3); }
.callout-tag { display: inline-block; font-family: var(--sans); font-size: 0.7rem; letter-spacing: 0.15em; text-transform: uppercase; font-weight: 700; color: var(--caramel); margin-bottom: 0.4rem; }
.callout-do .callout-tag { color: #7fa342; }
.last-call { display: block; border: none; text-align: center; }
.lc-inner { background: var(--espresso); color: var(--foam); border-radius: 28px; padding: clamp(2.2rem,5vw,3.5rem); box-shadow: 0 24px 50px rgba(42,26,18,.3); }
.lc-inner h3 { color: var(--foam); font-size: clamp(1.8rem,4vw,2.4rem); margin-bottom: 1rem; }
.lc-inner p { color: var(--latte); font-size: 1.1rem; margin-bottom: 1rem; }
[data-theme="night"] .lc-inner p { color: #cbb69c; }
.lc-tag { font-family: var(--serif); font-style: italic; color: var(--gold) !important; font-size: 1.15rem !important; }

/* ===== GLOSSARY ===== */
.glossary { position: relative; z-index: 1; max-width: var(--maxw); margin: 0 auto; padding: clamp(3rem,7vw,5rem) clamp(1.2rem,4vw,3rem); }
.gloss-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px,1fr)); gap: 1rem; }
.gloss { background: var(--card-bg); border: 1px solid var(--card-border); border-radius: 16px; padding: 1.2rem 1.3rem; transition: transform .2s, box-shadow .2s; }
.gloss:hover { transform: translateY(-3px); box-shadow: 0 12px 26px rgba(42,26,18,.1); }
.gloss dt { font-family: var(--serif); font-weight: 700; font-size: 1.2rem; color: var(--coffee); margin-bottom: 0.3rem; }
.gloss dd { color: var(--text-soft); font-size: 0.97rem; }

/* ===== NEWSLETTER ===== */
.newsletter { position: relative; z-index: 1; max-width: 820px; margin: 0 auto; padding: clamp(3rem,7vw,5rem) clamp(1.2rem,4vw,3rem); }
.news-inner { text-align: center; background: linear-gradient(160deg, var(--bg1), var(--bg2)); border: 1px solid var(--card-border); border-radius: 28px; padding: clamp(2.4rem,6vw,4rem) clamp(1.4rem,5vw,3.5rem); box-shadow: 0 18px 44px var(--shadow); }
.news-inner h2 { font-size: clamp(1.7rem,3.6vw,2.4rem); }
.news-inner .sub { color: var(--text-soft); margin: 0.9rem auto 1.8rem; max-width: 44ch; }
.news-form { display: flex; gap: 0.6rem; max-width: 460px; margin: 0 auto; flex-wrap: wrap; justify-content: center; }
.news-form input { flex: 1 1 240px; padding: 0.85rem 1.1rem; border-radius: 999px; border: 1.5px solid var(--latte); font-size: 1rem; font-family: var(--sans); background: var(--card-bg); color: var(--text); }
.news-form input:focus { outline: none; border-color: var(--caramel); box-shadow: 0 0 0 4px rgba(217,154,43,.18); }
.news-note { margin-top: 1.2rem; color: #7fa342; font-weight: 600; }

/* ===== FOOTER ===== */
.footer { text-align: center; padding: clamp(3rem,6vw,4.5rem) 1.5rem 3rem; color: var(--text-soft); position: relative; z-index: 1; }
.foot-brand { font-family: var(--serif); font-weight: 700; font-size: 1.4rem; color: var(--text); margin-bottom: 0.6rem; }
.footer .copy { margin-top: 0.8rem; font-size: 0.85rem; color: var(--caramel); }

/* ===== reveal animation ===== */
.reveal { opacity: 0; transform: translateY(28px); transition: opacity .7s ease, transform .7s ease; }
.reveal.in { opacity: 1; transform: none; }

/* ===== responsive ===== */
@media (max-width: 820px) {
  .hero { grid-template-columns: 1fr; text-align: center; }
  .hero .lede { margin-left: auto; margin-right: auto; }
  .hero-actions { justify-content: center; }
  .hero-cup { order: -1; min-height: 240px; }
  .scroll-hint { display: none; }
  .stats { grid-template-columns: repeat(2,1fr); }
  .nav-links a:not(.nav-cta) { display: none; }
  .story { grid-template-columns: 1fr; gap: 0.4rem; }
  .story-num { font-size: 1.8rem; }
}
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  .mug, .cup-glow, .mug .s, .scroll-hint span, .open-dot { animation: none; }
  html { scroll-behavior: auto; }
}