/* GRE Podcast — dark, minimal */
:root {
  color-scheme: dark;
  --bg: #0e1113;
  --surface: #161b1e;
  --surface-2: #1d2428;
  --border: rgba(255, 255, 255, 0.08);
  --border-strong: rgba(255, 255, 255, 0.14);
  --text: #e9eef1;
  --muted: #8c99a1;
  --accent: #a3e635;
  --accent-strong: #b5f04d;
  --accent-ink: #16210a;
  --accent-soft: rgba(163, 230, 53, 0.12);
  --amber: #fbbf24;
  --amber-soft: rgba(251, 191, 36, 0.12);
  --danger: #f87171;
  --radius: 14px;
  --shadow: 0 8px 28px rgba(0, 0, 0, 0.35);
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  accent-color: var(--accent);
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
button { font: inherit; cursor: pointer; }

/* ------------------------------ Header ------------------------------ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(14, 17, 19, 0.82);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border);
}
.site-header .inner {
  max-width: 1060px;
  margin: 0 auto;
  padding: 0 20px;
  height: 60px;
  display: flex;
  align-items: center;
  gap: 18px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 1.02rem;
  color: var(--text);
  white-space: nowrap;
}
.brand:hover { text-decoration: none; }
.brand .logo {
  width: 30px; height: 30px;
  display: inline-flex; align-items: center; justify-content: center;
  background: var(--accent);
  color: var(--accent-ink);
  border-radius: 9px;
}
.brand .logo svg { width: 17px; height: 17px; }
.brand em { color: var(--accent); font-style: normal; }

.nav-tabs { display: flex; gap: 2px; margin-left: 6px; }
.nav-tabs a {
  padding: 7px 14px;
  border-radius: 999px;
  color: var(--muted);
  font-weight: 600;
  font-size: 0.9rem;
}
.nav-tabs a:hover { color: var(--text); text-decoration: none; }
.nav-tabs a.active { background: var(--accent-soft); color: var(--accent); }

.header-right { margin-left: auto; display: flex; align-items: center; gap: 12px; }
.access-chip {
  font-size: 0.78rem;
  font-weight: 700;
  padding: 6px 13px;
  border-radius: 999px;
  border: 1px solid var(--border-strong);
  color: var(--muted);
  background: transparent;
  white-space: nowrap;
}
.access-chip.unlocked { background: var(--accent-soft); border-color: transparent; color: var(--accent); }
.access-chip.lockable { cursor: pointer; }
.access-chip.lockable:hover { border-color: var(--accent); color: var(--accent); }

/* ------------------------------ Layout ------------------------------ */
.page {
  max-width: 1060px;
  width: 100%;
  margin: 0 auto;
  padding: 40px 20px 70px;
  flex: 1;
}
.page-title { font-size: 1.85rem; font-weight: 800; letter-spacing: -0.02em; }
.page-sub { color: var(--muted); margin-top: 8px; max-width: 620px; }

/* ------------------------------ Deck grid ------------------------------ */
.set-title {
  margin: 38px 0 14px;
  font-size: 0.8rem;
  font-weight: 800;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
}
.set-title:first-child { margin-top: 30px; }
.deck-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(265px, 1fr));
  gap: 14px;
}
.deck-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  cursor: pointer;
  transition: border-color 0.15s ease, background 0.15s ease, transform 0.15s ease;
}
.deck-card:hover { border-color: var(--border-strong); background: var(--surface-2); transform: translateY(-2px); }
.deck-card.disabled { opacity: 0.45; cursor: default; }
.deck-card.disabled:hover { border-color: var(--border); background: var(--surface); transform: none; }

.deck-top { display: flex; align-items: center; justify-content: space-between; gap: 8px; }
.deck-title { font-size: 1.05rem; font-weight: 700; letter-spacing: -0.01em; }
.badge {
  font-size: 0.66rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  padding: 3px 9px;
  border-radius: 999px;
  text-transform: uppercase;
  white-space: nowrap;
}
.badge.free { background: var(--accent-soft); color: var(--accent); }
.badge.locked { background: var(--amber-soft); color: var(--amber); }
.badge.soon { background: rgba(255, 255, 255, 0.06); color: var(--muted); }

.deck-meta { color: var(--muted); font-size: 0.85rem; }

.progress-track {
  height: 6px;
  background: rgba(255, 255, 255, 0.07);
  border-radius: 999px;
  overflow: hidden;
}
.progress-fill { height: 100%; background: var(--accent); border-radius: 999px; width: 0; }
.progress-label { font-size: 0.78rem; color: var(--muted); }

.deck-action { margin-top: auto; padding-top: 6px; font-weight: 700; font-size: 0.92rem; color: var(--accent); }
.deck-action.locked { color: var(--amber); }

/* ------------------------------ Buttons ------------------------------ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border: none;
  border-radius: 10px;
  padding: 13px 24px;
  font-weight: 700;
  font-size: 0.98rem;
  transition: background 0.15s ease, transform 0.1s ease;
  text-decoration: none !important;
}
.btn:active { transform: scale(0.98); }
.btn-primary { background: var(--accent); color: var(--accent-ink); }
.btn-primary:hover { background: var(--accent-strong); }
.btn-green { background: var(--accent); color: var(--accent-ink); }
.btn-green:hover { background: var(--accent-strong); }
.btn-ghost { background: transparent; color: var(--muted); padding: 12px 10px; }
.btn-ghost:hover { color: var(--text); }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }
.btn-block { width: 100%; }

/* ------------------------------ Landing ------------------------------ */
.hero { padding: 84px 20px 56px; text-align: center; }
.hero h1 {
  font-size: clamp(2rem, 5.5vw, 3.1rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.15;
  max-width: 760px;
  margin: 0 auto;
}
.hero h1 em {
  font-style: normal;
  background: linear-gradient(100deg, var(--accent) 20%, #4ade80 80%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.hero p { color: var(--muted); max-width: 580px; margin: 18px auto 0; font-size: 1.08rem; }
.hero-ctas { margin-top: 32px; display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }

.choice-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 14px;
  max-width: 720px;
  margin: 26px auto 0;
  padding: 0 20px;
}
.choice-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 24px;
  text-align: center;
  display: block;
  color: var(--text);
  transition: border-color 0.15s ease, transform 0.15s ease;
}
.choice-card:hover { text-decoration: none; border-color: var(--border-strong); transform: translateY(-2px); }
.choice-card .icon { font-size: 1.8rem; }
.choice-card h2 { font-size: 1.15rem; margin-top: 10px; letter-spacing: -0.01em; }
.choice-card p { color: var(--muted); font-size: 0.9rem; margin-top: 6px; }
.choice-card .go { display: inline-block; margin-top: 14px; font-weight: 700; font-size: 0.92rem; color: var(--accent); }

.section { max-width: 860px; margin: 0 auto; padding: 64px 20px 0; }
.section h2 { font-size: 1.45rem; text-align: center; letter-spacing: -0.02em; }
.steps { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 14px; margin-top: 26px; }
.step { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 22px; }
.step .num {
  width: 30px; height: 30px; border-radius: 50%;
  background: var(--accent-soft); color: var(--accent);
  display: flex; align-items: center; justify-content: center;
  font-weight: 800; margin-bottom: 12px;
}
.step h3 { font-size: 1rem; }
.step p { font-size: 0.88rem; color: var(--muted); margin-top: 4px; }

.price-card {
  background: var(--surface);
  border: 1px solid var(--accent);
  border-radius: var(--radius);
  max-width: 420px;
  margin: 28px auto 0;
  padding: 30px 28px;
  text-align: center;
  box-shadow: 0 0 60px rgba(163, 230, 53, 0.07);
}
.price-card .amount { font-size: 2.5rem; font-weight: 800; letter-spacing: -0.02em; }
.price-card .amount small { font-size: 1rem; color: var(--muted); font-weight: 600; }
.price-card ul { list-style: none; margin: 18px 0 22px; text-align: left; }
.price-card li { padding: 5px 0 5px 28px; position: relative; font-size: 0.93rem; color: var(--text); }
.price-card li::before { content: "✓"; position: absolute; left: 2px; color: var(--accent); font-weight: 800; }
.pay-methods { color: var(--muted); font-size: 0.8rem; margin-top: 14px; }

/* ------------------------------ Player ------------------------------ */
.player-wrap { max-width: 560px; margin: 0 auto; }
.back-link { font-weight: 600; font-size: 0.9rem; color: var(--muted); }
.back-link:hover { color: var(--accent); }
.player-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 18px;
  margin-top: 16px;
  padding: 34px 28px;
  text-align: center;
}
.artwork {
  width: 180px; height: 180px;
  margin: 0 auto;
  border-radius: 22px;
  background:
    radial-gradient(120% 120% at 15% 10%, rgba(163, 230, 53, 0.5) 0%, rgba(163, 230, 53, 0.08) 45%, transparent 70%),
    linear-gradient(160deg, #1c2b1a 0%, #101d21 70%);
  border: 1px solid var(--border-strong);
  color: var(--text);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
}
.artwork .numeral { font-size: 3.3rem; font-weight: 800; line-height: 1; color: var(--accent); }
.artwork .set { font-size: 0.66rem; letter-spacing: 0.2em; text-transform: uppercase; color: var(--muted); }
.player-title { margin-top: 22px; font-size: 1.3rem; font-weight: 800; letter-spacing: -0.02em; }
.player-meta { color: var(--muted); font-size: 0.88rem; margin-top: 2px; }

.mode-toggle {
  display: inline-flex;
  margin-top: 16px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 3px;
}
.mode-toggle button {
  border: none;
  background: transparent;
  padding: 6px 18px;
  border-radius: 999px;
  font-weight: 700;
  font-size: 0.83rem;
  color: var(--muted);
}
.mode-toggle button.active { background: var(--accent); color: var(--accent-ink); }
.mode-toggle button:disabled { opacity: 0.4; cursor: not-allowed; }

.seek-row { margin-top: 28px; }
input[type="range"].seek { width: 100%; height: 6px; }
.time-row {
  display: flex; justify-content: space-between;
  color: var(--muted); font-size: 0.78rem;
  font-variant-numeric: tabular-nums;
  margin-top: 6px;
}

.controls { display: flex; align-items: center; justify-content: center; gap: 26px; margin-top: 18px; }
.ctrl-btn {
  background: none; border: none;
  color: var(--muted);
  font-weight: 700; font-size: 0.8rem;
  display: flex; flex-direction: column; align-items: center; gap: 2px;
}
.ctrl-btn svg { width: 28px; height: 28px; }
.ctrl-btn:hover { color: var(--text); }
.play-btn {
  width: 72px; height: 72px;
  border-radius: 50%;
  border: none;
  background: var(--accent);
  color: var(--accent-ink);
  display: flex; align-items: center; justify-content: center;
  box-shadow: 0 6px 26px rgba(163, 230, 53, 0.35);
  transition: background 0.15s ease, transform 0.1s ease;
}
.play-btn:hover { background: var(--accent-strong); }
.play-btn:active { transform: scale(0.95); }
.play-btn svg { width: 30px; height: 30px; }

.speed-btn {
  margin-top: 20px;
  background: transparent;
  border: 1px solid var(--border-strong);
  border-radius: 999px;
  padding: 6px 16px;
  font-weight: 700;
  font-size: 0.8rem;
  color: var(--muted);
}
.speed-btn:hover { color: var(--text); border-color: var(--text); }

.deck-nav { display: flex; justify-content: space-between; gap: 12px; margin-top: 20px; font-weight: 600; font-size: 0.88rem; }
.deck-nav a { color: var(--muted); }
.deck-nav a:hover { color: var(--accent); }
.deck-nav .disabled { visibility: hidden; }

.locked-panel { padding: 10px 4px 4px; }
.locked-panel .lock-icon { font-size: 2.3rem; }
.locked-panel h2 { margin-top: 10px; letter-spacing: -0.01em; }
.locked-panel p { color: var(--muted); margin: 8px 0 20px; }

/* ------------------------------ Modal ------------------------------ */
.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(5, 8, 10, 0.7);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  z-index: 50;
}
.modal {
  background: var(--surface-2);
  border: 1px solid var(--border-strong);
  border-radius: 18px;
  max-width: 420px;
  width: 100%;
  padding: 32px 28px;
  text-align: center;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: var(--shadow);
}
.modal h2 { font-size: 1.25rem; letter-spacing: -0.01em; }
.modal .modal-sub { color: var(--muted); font-size: 0.92rem; margin-top: 8px; }
.modal .big-price { font-size: 2.1rem; font-weight: 800; margin: 16px 0 2px; letter-spacing: -0.02em; }
.modal .big-price small { font-size: 0.92rem; color: var(--muted); font-weight: 600; }
.modal .actions { margin-top: 22px; display: flex; flex-direction: column; gap: 10px; }
.modal .fine { font-size: 0.76rem; color: var(--muted); margin-top: 16px; }
.code-box {
  margin: 16px 0 4px;
  background: var(--bg);
  border: 1px dashed var(--border-strong);
  border-radius: 10px;
  padding: 13px;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 0.95rem;
  color: var(--accent);
  user-select: all;
  word-break: break-all;
}

/* ------------------------------ Forms ------------------------------ */
.form-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  max-width: 460px;
  margin: 28px auto 0;
  padding: 30px 28px;
}
.form-card label { font-weight: 700; font-size: 0.88rem; display: block; margin-bottom: 8px; }
.form-card input[type="text"] {
  width: 100%;
  background: var(--bg);
  border: 1px solid var(--border-strong);
  color: var(--text);
  border-radius: 10px;
  padding: 13px 14px;
  font: inherit;
  margin-bottom: 14px;
}
.form-card input[type="text"]::placeholder { color: rgba(140, 153, 161, 0.5); }
.form-card input[type="text"]:focus { outline: 2px solid var(--accent); border-color: transparent; }
.form-msg { margin-top: 12px; font-size: 0.9rem; }
.form-msg.err { color: var(--danger); }
.form-msg.ok { color: var(--accent); }
.hint { color: var(--muted); font-size: 0.83rem; margin-top: 16px; }

/* ------------------------------ Toast & footer ------------------------------ */
.toast {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--surface-2);
  border: 1px solid var(--border-strong);
  color: var(--text);
  padding: 12px 20px;
  border-radius: 999px;
  font-size: 0.88rem;
  font-weight: 600;
  box-shadow: var(--shadow);
  z-index: 60;
  max-width: calc(100vw - 40px);
  animation: toast-in 0.25s ease;
}
@keyframes toast-in { from { opacity: 0; transform: translate(-50%, 8px); } }

.site-footer {
  border-top: 1px solid var(--border);
  padding: 26px 20px 34px;
  text-align: center;
  color: var(--muted);
  font-size: 0.78rem;
  margin-top: 60px;
}
.site-footer .links { margin-bottom: 6px; }
.site-footer .links a { margin: 0 8px; color: var(--muted); }
.site-footer .links a:hover { color: var(--accent); }

@media (max-width: 620px) {
  .site-header .inner { height: auto; flex-wrap: wrap; padding: 10px 14px; row-gap: 4px; }
  .nav-tabs { order: 3; width: 100%; margin-left: 0; }
  .hero { padding: 56px 20px 40px; }
  .page { padding-top: 28px; }
  .controls { gap: 18px; }
  .player-card { padding: 28px 18px; }
}