/* Creative Coding course — styles. Clean, modern, with a creative accent gradient. */

:root {
  --bg: #0f1020;
  --bg-soft: #16172b;
  --panel: #1c1d36;
  --panel-2: #232545;
  --ink: #e9e9f2;
  --ink-dim: #a7a8c4;
  --ink-faint: #6f7095;
  --line: #2c2e52;
  --accent: #ff6b9d;
  --accent-2: #6b7bff;
  --accent-3: #43e0c8;
  --ok: #43e08a;
  --bad: #ff6b6b;
  --warn: #ffcf5c;
  --radius: 14px;
  --shadow: 0 10px 40px rgba(0, 0, 0, 0.35);
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  --sans: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background:
    radial-gradient(1200px 600px at 80% -10%, rgba(107, 123, 255, 0.18), transparent 60%),
    radial-gradient(900px 500px at -10% 10%, rgba(255, 107, 157, 0.14), transparent 55%),
    var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  line-height: 1.6;
  min-height: 100vh;
}

.wrap { max-width: 1080px; margin: 0 auto; padding: 0 24px; }

/* ── header / footer ── */
.site-header {
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(8px);
  position: sticky; top: 0; z-index: 20;
  background: rgba(15, 16, 32, 0.7);
}
.site-header .wrap { display: flex; align-items: center; justify-content: space-between; height: 62px; }
.brand, .brand-link { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 1.05rem; color: var(--ink); text-decoration: none; }
.brand-dot {
  width: 14px; height: 14px; border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  box-shadow: 0 0 16px rgba(255, 107, 157, 0.6);
}
.site-nav { display: flex; gap: 22px; }
.site-nav a { color: var(--ink-dim); text-decoration: none; font-size: 0.92rem; }
.site-nav a:hover, .site-nav a.active { color: var(--ink); }

.site-footer { border-top: 1px solid var(--line); margin-top: 64px; padding: 22px 0; color: var(--ink-faint); font-size: 0.85rem; }

/* ── hero ── */
.hero { padding: 56px 0 24px; }
.hero h1 {
  font-size: 2.6rem; line-height: 1.1; margin: 0 0 12px;
  background: linear-gradient(120deg, #fff, var(--accent) 60%, var(--accent-2));
  -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent;
}
.hero-sub { font-size: 1.15rem; color: var(--ink-dim); margin: 0 0 28px; max-width: 640px; }

/* ── enroll / paywall ── */
.enroll-banner {
  display: flex; align-items: center; gap: 20px; flex-wrap: wrap;
  background: linear-gradient(135deg, var(--panel-2), var(--panel));
  border: 1px solid var(--line); border-radius: var(--radius);
  padding: 20px 24px; margin-bottom: 22px; box-shadow: var(--shadow);
}
.enroll-banner.flash { animation: flash 0.7s ease; }
@keyframes flash { 0%,100% { box-shadow: var(--shadow); } 50% { box-shadow: 0 0 0 3px var(--accent); } }
.enroll-price { display: flex; flex-direction: column; }
.enroll-amount { font-size: 2rem; font-weight: 800; color: #fff; }
.enroll-once { color: var(--ink-faint); font-size: 0.85rem; }
.enroll-banner.is-enrolled { background: linear-gradient(135deg, rgba(67,224,138,0.12), var(--panel)); }
.enroll-tag { font-weight: 800; color: var(--ok); }
.enroll-text { color: var(--ink-dim); flex: 1; }

/* ── progress ── */
.progress-card { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); padding: 18px 22px; }
.progress-head { display: flex; justify-content: space-between; align-items: center; margin-bottom: 12px; color: var(--ink-dim); font-size: 0.92rem; }
.progress-bar { height: 10px; background: var(--bg-soft); border-radius: 99px; overflow: hidden; }
.progress-fill { height: 100%; width: 0%; border-radius: 99px; background: linear-gradient(90deg, var(--accent), var(--accent-2)); transition: width 0.4s ease; }

/* ── modules / lessons ── */
.module { margin-top: 36px; }
.module-head { margin-bottom: 14px; }
.module-index { color: var(--accent); font-weight: 700; font-size: 0.8rem; letter-spacing: 0.08em; text-transform: uppercase; }
.module-head h2 { margin: 4px 0 4px; font-size: 1.5rem; }
.module-blurb { margin: 0; color: var(--ink-dim); }
.lesson-list { list-style: none; margin: 0; padding: 0; display: grid; gap: 10px; }
.lesson-row a, .lesson-locked-btn {
  display: flex; align-items: center; gap: 14px; width: 100%;
  background: var(--panel); border: 1px solid var(--line); border-radius: 12px;
  padding: 14px 18px; text-decoration: none; color: var(--ink);
  font: inherit; text-align: left; cursor: pointer; transition: transform 0.12s ease, border-color 0.12s ease;
}
.lesson-row a:hover, .lesson-locked-btn:hover { transform: translateX(4px); border-color: var(--accent-2); }
.lesson-row.is-locked .lesson-locked-btn { opacity: 0.7; }
.lesson-check { width: 22px; height: 22px; display: grid; place-items: center; border-radius: 50%; background: var(--bg-soft); color: var(--ok); font-weight: 800; font-size: 0.85rem; flex: none; }
.lesson-row.is-done .lesson-check { background: rgba(67,224,138,0.18); }
.lesson-name { flex: 1; font-weight: 600; }
.lesson-meta { color: var(--ink-faint); font-size: 0.85rem; }

/* ── buttons ── */
.btn {
  background: linear-gradient(135deg, var(--accent-2), var(--accent)); color: #fff;
  border: none; border-radius: 10px; padding: 10px 18px; font: inherit; font-weight: 700;
  cursor: pointer; text-decoration: none; display: inline-flex; align-items: center; gap: 8px;
  transition: filter 0.12s ease, transform 0.08s ease;
}
.btn:hover { filter: brightness(1.08); }
.btn:active { transform: translateY(1px); }
.btn:disabled { opacity: 0.4; cursor: not-allowed; }
.btn-ghost { background: transparent; border: 1px solid var(--line); color: var(--ink-dim); }
.btn-ghost:hover { color: var(--ink); border-color: var(--ink-faint); filter: none; }
.btn-small { padding: 7px 12px; font-size: 0.85rem; }
.btn-buy { background: linear-gradient(135deg, var(--accent), #ff9a5c); font-size: 1.02rem; padding: 13px 24px; }

/* ── lesson page: sidebar + main ── */
.lesson-wrap { padding-top: 28px; }
.lesson-layout { display: grid; grid-template-columns: 248px 1fr; gap: 28px; align-items: start; }

.lesson-sidebar {
  position: sticky; top: 86px;
  background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 16px; box-shadow: var(--shadow);
}
.sidebar-head { padding: 4px 6px 12px; border-bottom: 1px solid var(--line); margin-bottom: 10px; }
.sidebar-eyebrow { display: block; color: var(--accent); font-size: 0.72rem; font-weight: 800; letter-spacing: 0.06em; text-transform: uppercase; }
.sidebar-progress { color: var(--ink-faint); font-size: 0.8rem; margin-top: 4px; }
.sidebar-nav { display: grid; gap: 4px; }
.sidebar-link {
  display: flex; align-items: center; gap: 10px; padding: 9px 10px; border-radius: 9px;
  text-decoration: none; color: var(--ink-dim); font-size: 0.9rem; transition: background 0.12s, color 0.12s;
}
.sidebar-link:hover { background: var(--bg-soft); color: var(--ink); }
.sidebar-link.active { background: linear-gradient(135deg, rgba(107,123,255,0.22), rgba(255,107,157,0.12)); color: #fff; font-weight: 700; }
.sidebar-tick {
  width: 22px; height: 22px; flex: none; display: grid; place-items: center; border-radius: 50%;
  background: var(--bg-soft); color: var(--ink-faint); font-size: 0.78rem; font-weight: 800;
}
.sidebar-link.done .sidebar-tick { background: rgba(67,224,138,0.2); color: var(--ok); }
.sidebar-link.active .sidebar-tick { background: rgba(255,255,255,0.18); color: #fff; }
.sidebar-name { line-height: 1.25; }
.sidebar-cheat { width: 100%; justify-content: center; margin-top: 12px; }
.btn-cheat { margin-top: 10px; }
.sidebar-back { display: block; margin-top: 10px; padding: 8px 10px; color: var(--ink-faint); text-decoration: none; font-size: 0.85rem; border-top: 1px solid var(--line); }
.sidebar-back:hover { color: var(--ink); }

@media (max-width: 820px) {
  .lesson-layout { grid-template-columns: 1fr; }
  .lesson-sidebar { position: static; }
  .sidebar-nav { grid-auto-flow: row; }
}

/* ── practice step ── */
.practice { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); padding: 24px 26px; box-shadow: var(--shadow); }
.practice-title { margin: 0 0 4px; font-size: 1.35rem; color: var(--accent-3); }
.practice-sub { margin: 0 0 16px; color: var(--ink-faint); font-size: 0.9rem; }
.practice-list { display: grid; gap: 22px; }
.practice-item { border-top: 1px solid var(--line); padding-top: 18px; }
.practice-item:first-child { border-top: none; padding-top: 0; }
.practice-prompt { display: flex; gap: 10px; align-items: baseline; font-weight: 600; margin-bottom: 4px; }
.practice-num { flex: none; background: var(--bg-soft); color: var(--accent-3); border-radius: 6px; padding: 1px 9px; font-size: 0.85rem; font-weight: 800; }
.practice-runner { margin-top: 8px; }
.practice-hint { margin-top: 10px; }
.practice-hint summary { cursor: pointer; color: var(--accent-2); font-size: 0.88rem; user-select: none; }
.practice-hint summary:hover { color: var(--ink); }
.practice-hint-body { margin-top: 8px; padding: 10px 12px; background: var(--bg-soft); border: 1px solid var(--line); border-radius: 8px; font-family: var(--mono); font-size: 0.82rem; color: var(--accent-3); white-space: pre-wrap; }

.dot-practice { border: 2px solid var(--accent-3); background: transparent; }
.dot-practice.active { background: var(--accent-3); }

.lesson-top { margin-bottom: 18px; }
.lesson-crumb { color: var(--accent); font-weight: 700; font-size: 0.82rem; text-transform: uppercase; letter-spacing: 0.06em; }
.lesson-h1 { margin: 6px 0 8px; font-size: 2rem; }
.slide-progress { color: var(--ink-faint); font-size: 0.88rem; }

.slide { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); padding: 26px 28px; box-shadow: var(--shadow); }
.slide-title { margin: 0 0 14px; font-size: 1.4rem; }
.slide-body { color: var(--ink); }
.slide-body p { margin: 0 0 12px; }
.slide-body ul { margin: 0 0 12px; padding-left: 22px; color: var(--ink-dim); }
.slide-body li { margin: 4px 0; }
.slide-body code, .slide-body strong code { font-family: var(--mono); background: var(--bg-soft); border: 1px solid var(--line); border-radius: 6px; padding: 1px 6px; font-size: 0.9em; color: var(--accent-3); }
.slide-body em { color: var(--ink-dim); }

.slide-nav { display: flex; align-items: center; justify-content: space-between; margin: 20px 0; gap: 16px; }
.slide-dots { display: flex; gap: 8px; }
.dot { width: 10px; height: 10px; border-radius: 50%; background: var(--line); cursor: pointer; transition: transform 0.1s; }
.dot:hover { transform: scale(1.25); }
.dot.active { background: var(--accent); }
.dot-quiz { border: 2px solid var(--accent-2); background: transparent; }
.dot-quiz.active { background: var(--accent-2); }

/* ── live code runner ── */
.runner { margin-top: 20px; border: 1px solid var(--line); border-radius: 12px; overflow: hidden; background: var(--bg-soft); }
.runner-toolbar { display: flex; align-items: center; justify-content: space-between; padding: 8px 12px; background: var(--panel-2); border-bottom: 1px solid var(--line); }
.runner-label { color: var(--accent-3); font-family: var(--mono); font-size: 0.82rem; }
.runner-actions { display: flex; gap: 8px; }
.runner-actions .btn { padding: 6px 14px; font-size: 0.85rem; }
.runner-body { display: grid; grid-template-columns: 1fr 1fr; min-height: 320px; }
.runner-editor { border-right: 1px solid var(--line); overflow: hidden; }
.runner-output { display: grid; place-items: center; background: #fafafa; }
.runner-frame { width: 100%; height: 100%; min-height: 320px; border: none; background: #fafafa; }
.runner-console { max-height: 130px; overflow: auto; padding: 8px 12px; background: #0b0c18; border-top: 1px solid var(--line); font-family: var(--mono); font-size: 0.82rem; }
.console-line { white-space: pre-wrap; padding: 1px 0; }
.console-log { color: var(--ink-dim); }
.console-warn { color: var(--warn); }
.console-error { color: var(--bad); }

@media (max-width: 720px) {
  .runner-body { grid-template-columns: 1fr; }
  .runner-editor { border-right: none; border-bottom: 1px solid var(--line); }
}

/* CodeMirror custom theme "cc" */
.CodeMirror.cm-s-cc { height: auto; min-height: 320px; background: #14152a; color: #e9e9f2; font-family: var(--mono); font-size: 13.5px; line-height: 1.55; }
.cm-s-cc .CodeMirror-gutters { background: #101126; border-right: 1px solid var(--line); }
.cm-s-cc .CodeMirror-linenumber { color: #4a4c78; }
.cm-s-cc .CodeMirror-cursor { border-left: 2px solid var(--accent); }
.cm-s-cc .CodeMirror-selected { background: rgba(107,123,255,0.25); }
.cm-s-cc .cm-keyword { color: #ff6b9d; }
.cm-s-cc .cm-number { color: #43e0c8; }
.cm-s-cc .cm-def { color: #ffcf5c; }
.cm-s-cc .cm-variable { color: #e9e9f2; }
.cm-s-cc .cm-variable-2 { color: #9aa0ff; }
.cm-s-cc .cm-property { color: #8fd6ff; }
.cm-s-cc .cm-comment { color: #6f7095; font-style: italic; }
.cm-s-cc .cm-string { color: #ffb37a; }
.cm-s-cc .cm-operator { color: #ff6b9d; }

/* ── quiz ── */
.quiz { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); padding: 24px 26px; margin-top: 16px; box-shadow: var(--shadow); }
.quiz-title { margin: 0 0 4px; font-size: 1.3rem; }
.quiz-sub { margin: 0 0 18px; color: var(--ink-faint); font-size: 0.9rem; }
.quiz-q { padding: 14px 0; border-top: 1px solid var(--line); }
.quiz-q:first-of-type { border-top: none; }
.quiz-prompt { font-weight: 600; margin: 0 0 12px; display: flex; gap: 10px; align-items: baseline; }
.quiz-num { background: var(--bg-soft); color: var(--accent); border-radius: 6px; padding: 1px 9px; font-size: 0.85rem; font-weight: 800; flex: none; }
.quiz-options { display: grid; gap: 8px; }
.quiz-option { display: flex; align-items: center; gap: 10px; padding: 10px 14px; border: 1px solid var(--line); border-radius: 10px; cursor: pointer; transition: border-color 0.12s; }
.quiz-option:hover { border-color: var(--accent-2); }
.quiz-option input { accent-color: var(--accent); }
.quiz-q.is-correct .quiz-option input:checked + .quiz-opt-text { color: var(--ok); font-weight: 700; }
.quiz-q.is-wrong .quiz-option input:checked + .quiz-opt-text { color: var(--bad); font-weight: 700; }
.quiz-explain { margin-top: 10px; font-size: 0.9rem; padding: 8px 12px; border-radius: 8px; }
.quiz-explain.is-ok { background: rgba(67,224,138,0.12); color: var(--ok); }
.quiz-explain.is-bad { background: rgba(255,107,107,0.12); color: var(--bad); }
.quiz-explain.is-warn { background: rgba(255,207,92,0.12); color: var(--warn); }
.quiz-actions { display: flex; align-items: center; gap: 16px; margin-top: 18px; }
.quiz-score { color: var(--ink-dim); font-weight: 700; }
.quiz-score.is-perfect { color: var(--ok); }

/* completion banner */
.complete-banner { display: flex; align-items: center; gap: 14px; margin-top: 18px; padding: 16px 20px; border-radius: 12px; background: linear-gradient(135deg, rgba(67,224,138,0.16), var(--panel)); border: 1px solid var(--line); font-weight: 700; }
.complete-check { width: 28px; height: 28px; display: grid; place-items: center; border-radius: 50%; background: var(--ok); color: #07210f; font-weight: 900; }

/* locked lesson page */
.locked-page { text-align: center; padding: 80px 20px; }
.locked-icon { font-size: 3rem; }
.locked-page h1 { margin: 12px 0; }
.locked-page p { color: var(--ink-dim); max-width: 460px; margin: 0 auto 18px; }
.locked-price { font-size: 1.8rem; font-weight: 800; margin-bottom: 22px; }
.locked-price span { font-size: 0.95rem; color: var(--ink-faint); font-weight: 400; }