/* RevisionTimetableMaker.com — core styles */
:root {
  --indigo:#4f46e5; --indigo-dark:#4338ca; --violet:#7c3aed;
  --ink:#1e293b; --muted:#64748b; --line:#e6e8f0; --bg:#eef1f8;
  --ok:#16a34a; --card:#ffffff; --radius:14px;
}
* { box-sizing:border-box; }
body {
  margin:0; font-family:'Helvetica Neue',Helvetica,Arial,sans-serif;
  background:var(--bg); color:var(--ink); line-height:1.5;
}
a { color:var(--indigo); }
.container { max-width:1100px; margin:0 auto; padding:24px 16px 64px; }

/* Header */
.site-header {
  background:#fff; border-bottom:1px solid var(--line);
  padding:14px 16px; display:flex; align-items:center; justify-content:space-between;
}
.site-header .brand { font-weight:700; font-size:18px; color:var(--ink); text-decoration:none; }
.site-header .brand span { color:var(--indigo); }
.site-header nav a { margin-left:18px; font-size:14px; text-decoration:none; color:var(--muted); }
.site-header nav a:hover { color:var(--indigo); }

/* Buttons */
.btn {
  display:inline-block; background:var(--indigo); color:#fff; border:none;
  padding:12px 22px; border-radius:10px; font-size:15px; font-weight:600;
  cursor:pointer; text-decoration:none; transition:background .15s;
}
.btn:hover { background:var(--indigo-dark); }
.btn.secondary { background:#fff; color:var(--indigo); border:1px solid var(--indigo); }
.btn.ghost { background:transparent; color:var(--muted); border:1px solid var(--line); }
.btn:disabled { opacity:.5; cursor:default; }

/* Setup panel */
.setup-panel {
  background:var(--card); border:1px solid var(--line); border-radius:var(--radius);
  padding:24px; margin-bottom:28px;
}
.setup-panel h1 { margin:0 0 4px; font-size:24px; }
.setup-panel .sub { margin:0 0 20px; color:var(--muted); font-size:14px; }
.field { margin-bottom:16px; }
.field label { display:block; font-size:13px; font-weight:600; margin-bottom:6px; }
.field input[type=text], .field input[type=date], .field input[type=email],
.field input[type=password], .field textarea, .field select {
  width:100%; padding:11px 13px; border:1px solid var(--line); border-radius:9px;
  font-size:15px; font-family:inherit; background:#fff;
}
.field textarea { min-height:160px; resize:vertical; }
.field .hint { font-size:12px; color:var(--muted); margin-top:5px; }
.dates-row { display:flex; gap:16px; flex-wrap:wrap; }
.dates-row .field { flex:1; min-width:160px; }

/* Source tabs */
.source-tabs { display:flex; gap:8px; margin-bottom:20px; flex-wrap:wrap; }
.source-tab {
  padding:9px 16px; border:1px solid var(--line); border-radius:999px;
  background:#fff; font-size:14px; cursor:pointer; color:var(--muted);
}
.source-tab.active { background:var(--indigo); color:#fff; border-color:var(--indigo); }
.source-pane { display:none; }
.source-pane.active { display:block; }

/* Timetable */
.month-block { margin-bottom:32px; }
.month-head {
  display:flex; align-items:center; justify-content:space-between;
  padding:10px 4px; border-bottom:2px solid var(--line); margin-bottom:16px;
}
.month-head h2 { margin:0; font-size:20px; color:var(--indigo-dark); }
.month-count { font-size:13px; color:var(--muted); font-weight:600; }

.week-block {
  background:var(--card); border:1px solid var(--line); border-radius:var(--radius);
  padding:18px; margin-bottom:16px;
}
.week-block.week-done { border-color:var(--ok); }
.week-head {
  display:flex; align-items:center; justify-content:space-between;
  gap:16px; flex-wrap:wrap; margin-bottom:14px;
}
.week-no { font-weight:700; font-size:15px; }
.week-range { color:var(--muted); font-size:13px; margin-left:10px; }
.week-progress { display:flex; align-items:center; gap:10px; min-width:200px; }
.week-progress .pct { font-size:12px; color:var(--muted); white-space:nowrap; }
.week-progress .bar { flex:1; height:8px; background:var(--line); border-radius:99px; overflow:hidden; }
.week-progress .bar-fill { height:100%; background:var(--indigo); transition:width .3s; }
.week-done .bar-fill { background:var(--ok); }

.topic-grid { display:grid; grid-template-columns:repeat(auto-fill,minmax(240px,1fr)); gap:12px; }
.topic-card {
  border:1px solid var(--line); border-radius:11px; padding:14px;
  background:#fff; display:flex; flex-direction:column; transition:box-shadow .15s;
}
.topic-card:hover { box-shadow:0 4px 16px rgba(0,0,0,.06); }
.topic-card.completed { background:#f0fdf4; border-color:#bbf7d0; }
.topic-unit { font-size:11px; text-transform:uppercase; letter-spacing:.05em; color:var(--violet); font-weight:700; margin-bottom:6px; }
.topic-title { margin:0 0 6px; font-size:15px; }
.topic-desc { margin:0 0 12px; font-size:13px; color:var(--muted); flex:1; }
.topic-foot { margin-top:auto; }
.complete-btn {
  width:100%; padding:8px; border:1px solid var(--indigo); background:#fff;
  color:var(--indigo); border-radius:8px; font-size:13px; font-weight:600; cursor:pointer;
}
.completed .complete-btn { background:var(--ok); color:#fff; border-color:var(--ok); }

.empty-state, .loading-state {
  text-align:center; padding:60px 20px; color:var(--muted);
  background:var(--card); border:1px dashed var(--line); border-radius:var(--radius);
}
.spinner {
  width:34px; height:34px; border:4px solid var(--line); border-top-color:var(--indigo);
  border-radius:50%; margin:0 auto 14px; animation:spin .8s linear infinite;
}
@keyframes spin { to { transform:rotate(360deg); } }

/* Upgrade banner */
.notice {
  background:#fef9c3; border:1px solid #fde68a; color:#854d0e;
  padding:14px 18px; border-radius:11px; margin-bottom:20px; font-size:14px;
}
.notice a { color:#854d0e; font-weight:700; }

@media (max-width:600px) {
  .topic-grid { grid-template-columns:1fr; }
  .week-head { flex-direction:column; align-items:flex-start; }
}

/* ============================================================
   Marketing homepage
   ============================================================ */
.hero {
  background:linear-gradient(160deg,#eef1f8 0%,#e0e7ff 55%,#ede9fe 100%);
  padding:72px 16px 88px; text-align:center; position:relative; overflow:hidden;
}
.hero-inner { max-width:820px; margin:0 auto; position:relative; z-index:1; }
.hero .eyebrow {
  display:inline-block; background:#fff; border:1px solid var(--line);
  color:var(--indigo); font-size:13px; font-weight:600; padding:6px 14px;
  border-radius:999px; margin-bottom:22px;
}
.hero h1 {
  font-size:48px; line-height:1.1; margin:0 0 20px; letter-spacing:-1px;
  color:var(--ink);
}
.hero h1 .grad {
  background:linear-gradient(120deg,var(--indigo),var(--violet));
  -webkit-background-clip:text; background-clip:text; color:transparent;
}
.hero p.lead { font-size:19px; color:var(--muted); margin:0 0 32px; line-height:1.6; }
.hero-cta { display:flex; gap:14px; justify-content:center; flex-wrap:wrap; }
.btn-lg { padding:16px 34px; font-size:17px; border-radius:12px; }
.btn-xl { box-shadow:0 10px 30px rgba(79,70,229,.35); }
.hero .trust { margin-top:22px; font-size:13px; color:var(--muted); }
.hero .trust strong { color:var(--ink); }

/* Section shell */
.section { padding:72px 16px; }
.section-inner { max-width:1080px; margin:0 auto; }
.section h2 { font-size:32px; text-align:center; margin:0 0 12px; letter-spacing:-.5px; }
.section .section-sub { text-align:center; color:var(--muted); font-size:17px; max-width:620px; margin:0 auto 48px; }
.section.alt { background:#fff; border-top:1px solid var(--line); border-bottom:1px solid var(--line); }

/* Steps */
.steps { display:grid; grid-template-columns:repeat(3,1fr); gap:28px; }
.step { text-align:center; padding:0 12px; }
.step .num {
  width:52px; height:52px; border-radius:50%; margin:0 auto 18px;
  background:linear-gradient(135deg,var(--indigo),var(--violet)); color:#fff;
  display:flex; align-items:center; justify-content:center; font-size:22px; font-weight:700;
}
.step h3 { margin:0 0 8px; font-size:19px; }
.step p { margin:0; color:var(--muted); font-size:15px; }

/* Feature grid */
.features { display:grid; grid-template-columns:repeat(3,1fr); gap:20px; }
.feature {
  background:var(--card); border:1px solid var(--line); border-radius:var(--radius);
  padding:26px; transition:transform .15s, box-shadow .15s;
}
.feature:hover { transform:translateY(-3px); box-shadow:0 12px 30px rgba(0,0,0,.07); }
.feature .ico { font-size:30px; margin-bottom:14px; }
.feature h3 { margin:0 0 8px; font-size:18px; }
.feature p { margin:0; color:var(--muted); font-size:15px; }

/* Pricing */
.pricing { display:grid; grid-template-columns:repeat(2,1fr); gap:24px; max-width:760px; margin:0 auto; }
.price-card {
  background:var(--card); border:1px solid var(--line); border-radius:16px; padding:32px;
}
.price-card.featured { border:2px solid var(--indigo); box-shadow:0 16px 40px rgba(79,70,229,.14); position:relative; }
.price-card.featured .badge {
  position:absolute; top:-13px; left:50%; transform:translateX(-50%);
  background:var(--indigo); color:#fff; font-size:12px; font-weight:700;
  padding:5px 14px; border-radius:999px;
}
.price-card h3 { margin:0 0 4px; font-size:20px; }
.price-card .amount { font-size:40px; font-weight:800; margin:8px 0; }
.price-card .amount span { font-size:16px; font-weight:500; color:var(--muted); }
.price-card ul { list-style:none; padding:0; margin:18px 0 24px; }
.price-card li { padding:7px 0 7px 28px; position:relative; font-size:15px; color:#334155; }
.price-card li::before { content:"✓"; position:absolute; left:0; color:var(--ok); font-weight:700; }
.price-card li.off { color:#94a3b8; }
.price-card li.off::before { content:"—"; color:#cbd5e1; }

/* SEO content block */
.seo-content { max-width:820px; margin:0 auto; }
.seo-content h2 { text-align:left; font-size:26px; margin:40px 0 14px; }
.seo-content h3 { font-size:19px; margin:28px 0 10px; }
.seo-content p { color:#334155; font-size:16px; line-height:1.75; margin:0 0 16px; }
.seo-content ul { color:#334155; font-size:16px; line-height:1.9; padding-left:22px; }

/* FAQ */
.faq { max-width:760px; margin:0 auto; }
.faq details {
  background:var(--card); border:1px solid var(--line); border-radius:12px;
  padding:18px 22px; margin-bottom:12px;
}
.faq summary { cursor:pointer; font-weight:600; font-size:17px; list-style:none; }
.faq summary::-webkit-details-marker { display:none; }
.faq summary::after { content:"+"; float:right; color:var(--indigo); font-size:22px; line-height:1; }
.faq details[open] summary::after { content:"−"; }
.faq details p { margin:14px 0 0; color:var(--muted); font-size:15px; line-height:1.7; }

/* Final CTA band */
.cta-band {
  background:linear-gradient(135deg,var(--indigo),var(--violet)); color:#fff;
  text-align:center; padding:72px 16px;
}
.cta-band h2 { color:#fff; font-size:34px; margin:0 0 14px; }
.cta-band p { color:rgba(255,255,255,.9); font-size:18px; margin:0 0 28px; }
.cta-band .btn { background:#fff; color:var(--indigo); }
.cta-band .btn:hover { background:#f1f5ff; }

/* Footer */
.site-footer { background:#1e293b; color:#94a3b8; padding:44px 16px; }
.site-footer .cols { max-width:1080px; margin:0 auto; display:flex; justify-content:space-between; flex-wrap:wrap; gap:24px; }
.site-footer a { color:#cbd5e1; text-decoration:none; display:block; margin:6px 0; font-size:14px; }
.site-footer a:hover { color:#fff; }
.site-footer h4 { color:#fff; font-size:14px; margin:0 0 10px; }
.site-footer .copy { max-width:1080px; margin:28px auto 0; padding-top:20px; border-top:1px solid #334155; font-size:13px; }

@media (max-width:820px) {
  .hero h1 { font-size:34px; }
  .hero p.lead { font-size:17px; }
  .steps, .features { grid-template-columns:1fr; }
  .pricing { grid-template-columns:1fr; }
  .section h2 { font-size:26px; }
}