/* TNPSC Exam Practice Portal — Sprint 0 stylesheet */
:root {
  --brand: #1A5276;
  --brand-dark: #12405E;
  --brand-light: #D6EAF8;
  --accent: #E67E22;
  --gray: #7F8C8D;
  --bg: #F6F8FA;
  --card: #FFFFFF;
  --text: #2C3E50;
  --success: #27AE60;
  --danger: #C0392B;
  --radius: 10px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
body {
  font-family: 'Segoe UI', 'Noto Sans Tamil', system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* ── Navbar ── */
.navbar { background: var(--brand); color: #fff; }
.nav-inner {
  max-width: 1100px; margin: 0 auto; padding: 14px 20px;
  display: flex; align-items: center; justify-content: space-between;
}
.brand { color: #fff; text-decoration: none; font-size: 1.35rem; font-weight: 800; letter-spacing: .5px; }
.brand span { color: var(--accent); }
.nav-links { display: flex; align-items: center; gap: 18px; }
.nav-links a { color: #fff; text-decoration: none; font-weight: 500; }
.nav-links a:hover { text-decoration: underline; }

/* ── Layout ── */
.container { max-width: 1100px; margin: 0 auto; padding: 28px 20px; flex: 1; width: 100%; }
.footer { background: var(--brand-dark); color: #cfe3f0; text-align: center; padding: 20px; font-size: .85rem; }
.footer .muted { color: #8fb4cc; margin-top: 4px; }

/* ── Buttons ── */
.btn {
  display: inline-block; padding: 9px 18px; border-radius: var(--radius);
  border: none; font-weight: 600; font-size: .95rem; cursor: pointer;
  text-decoration: none; transition: opacity .15s;
}
.btn:hover { opacity: .9; }
.btn-primary { background: var(--accent); color: #fff; }
.btn-brand { background: var(--brand); color: #fff; }
.btn-outline { background: transparent; color: #fff; border: 1.5px solid #fff; }
.btn-sm { padding: 5px 12px; font-size: .85rem; }

/* ── Cards ── */
.card {
  background: var(--card); border-radius: var(--radius);
  padding: 22px; box-shadow: 0 1px 4px rgba(0,0,0,.08); margin-bottom: 20px;
}
.card h2, .card h3 { color: var(--brand); margin-bottom: 12px; }

.grid { display: grid; gap: 18px; }
.grid-2 { grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); }
.grid-3 { grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); }
.grid-4 { grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); }

/* ── Hero ── */
.hero {
  background: linear-gradient(135deg, var(--brand) 0%, var(--brand-dark) 100%);
  color: #fff; border-radius: var(--radius); padding: 48px 32px;
  text-align: center; margin-bottom: 28px;
}
.hero h1 { font-size: 2.1rem; margin-bottom: 10px; }
.hero p { color: #cfe3f0; font-size: 1.1rem; max-width: 640px; margin: 0 auto 22px; }

/* ── Group cards ── */
.group-card { border-top: 4px solid var(--accent); }
.group-card .meta { color: var(--gray); font-size: .88rem; margin: 8px 0 14px; }
.group-card p { margin-bottom: 10px; }

/* ── Stats ── */
.stat { text-align: center; }
.stat .num { font-size: 2rem; font-weight: 800; color: var(--brand); }
.stat .label { color: var(--gray); font-size: .88rem; }

/* ── Forms ── */
form.stack { display: flex; flex-direction: column; gap: 12px; }
label { font-weight: 600; font-size: .9rem; color: var(--brand-dark); }
input, select, textarea {
  padding: 10px 12px; border: 1.5px solid #d5dde3; border-radius: 8px;
  font-size: .95rem; font-family: inherit; width: 100%;
}
input:focus, select:focus, textarea:focus { outline: 2px solid var(--brand-light); border-color: var(--brand); }
.form-row { display: flex; gap: 12px; }
.form-row > div { flex: 1; }

.error {
  background: #FDECEA; color: var(--danger); border: 1px solid #f5c6cb;
  padding: 10px 14px; border-radius: 8px; margin-bottom: 14px; font-size: .92rem;
}
.success-msg {
  background: #EAF7EF; color: var(--success); border: 1px solid #c3e6cb;
  padding: 10px 14px; border-radius: 8px; margin-bottom: 14px; font-size: .92rem;
}

/* ── Tables ── */
table { width: 100%; border-collapse: collapse; font-size: .92rem; }
th, td { padding: 10px 12px; text-align: left; border-bottom: 1px solid #e8edf1; }
th { background: var(--brand); color: #fff; font-weight: 600; }
tr:nth-child(even) td { background: #F4F9FC; }

/* ── Badges / pills ── */
.pill {
  display: inline-block; padding: 3px 10px; border-radius: 999px;
  font-size: .78rem; font-weight: 700;
}
.pill-demo { background: #eee; color: var(--gray); }
.pill-starter { background: var(--brand-light); color: var(--brand); }
.pill-growth { background: #FDEBD0; color: var(--accent); }
.pill-institution { background: #E8DAEF; color: #6C3483; }
.pill-code { background: var(--brand); color: #fff; letter-spacing: 1px; }

/* ── Syllabus tree ── */
.unit-block { margin-bottom: 18px; }
.unit-block h4 {
  background: var(--brand-light); color: var(--brand-dark);
  padding: 10px 14px; border-radius: 8px; margin-bottom: 8px;
}
.topic-list { list-style: none; padding-left: 8px; }
.topic-list li {
  padding: 8px 12px; border-left: 3px solid var(--accent);
  margin-bottom: 6px; background: #fff; border-radius: 0 8px 8px 0;
  display: flex; justify-content: space-between; align-items: center;
}
.topic-list .q-count { color: var(--gray); font-size: .82rem; }

/* ── Auth pages ── */
.auth-card { max-width: 440px; margin: 30px auto; }
.auth-card h2 { text-align: center; }
.auth-card .alt { text-align: center; margin-top: 14px; font-size: .9rem; }

details { margin-bottom: 12px; }
details summary {
  cursor: pointer; font-weight: 600; color: var(--brand);
  padding: 8px 0;
}

@media (max-width: 640px) {
  .hero h1 { font-size: 1.5rem; }
  .form-row { flex-direction: column; }
  .nav-links { gap: 10px; font-size: .9rem; }
}