/* ═══════════════════════════════════════
   Dr. UVC Math™ — Global CSS
   Brand Standard v1.0  (math sister of druvc.com)
═══════════════════════════════════════ */

:root {
  --bg:        #FFFDE7;
  --dark:      #1a1a2e;
  --navy:      #16213e;
  --violet:    #6a1b9a;   /* math accent (investing site uses blue) */
  --gold:      #FFD700;
  --green:     #00a854;
  --red:       #cc0033;
  --gray:      #888;
  --border:    #e0e0e0;
  --card-bg:   #ffffff;
  --text:      #1a1a2e;
  --subtext:   #555;
}

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

body {
  font-family: 'Segoe UI', Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  font-size: 15px;
  line-height: 1.6;
}

/* ── NAV ── */
nav {
  background: var(--dark);
  padding: 0 30px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 56px;
  position: sticky;
  top: 0;
  z-index: 100;
  border-bottom: 2px solid var(--gold);
}
nav .nav-brand { color: var(--gold); font-weight: 900; font-size: 15px; letter-spacing: 1px; text-decoration: none; }
nav .nav-links { display: flex; gap: 28px; }
nav .nav-links a { color: #ccc; text-decoration: none; font-size: 13px; letter-spacing: 0.5px; transition: color 0.2s; }
nav .nav-links a:hover { color: var(--gold); }
nav .nav-links a.active { color: var(--gold); font-weight: 700; }

/* ── HERO ── */
.hero {
  background: linear-gradient(135deg, #1a1a2e 0%, #2a1240 100%);
  color: #fff;
  text-align: center;
  padding: 60px 20px 50px;
  border-bottom: 3px solid var(--gold);
}
.hero .hero-eyebrow { font-size: 11px; letter-spacing: 3px; color: #b9a3d1; margin-bottom: 10px; text-transform: uppercase; }
.hero h1 { font-size: 36px; font-weight: 900; color: var(--gold); letter-spacing: 2px; line-height: 1.2; margin-bottom: 12px; }
.hero .hero-sub { font-size: 15px; color: #ddd; max-width: 680px; margin: 0 auto 24px; line-height: 1.7; }
.hero .hero-stats { display: flex; justify-content: center; gap: 40px; flex-wrap: wrap; margin-top: 20px; }
.hero .hs-item { text-align: center; }
.hero .hs-val { font-size: 28px; font-weight: 900; color: var(--gold); }
.hero .hs-lbl { font-size: 10px; color: #b9a3d1; letter-spacing: 2px; }

/* ── CONTAINERS ── */
.container { max-width: 1100px; margin: 0 auto; padding: 0 24px; }
.section-wrap { padding: 40px 0; }

/* ── SECTION TITLES ── */
.section-heading { font-size: 11px; font-weight: 800; letter-spacing: 3px; color: var(--violet); text-transform: uppercase; margin-bottom: 6px; }
.section-title { font-size: 22px; font-weight: 900; color: var(--dark); margin-bottom: 20px; padding-bottom: 10px; border-bottom: 3px solid var(--gold); }

/* ── CARDS ── */
.card { background: var(--card-bg); border: 1px solid var(--border); border-radius: 8px; padding: 20px 24px; margin-bottom: 14px; transition: box-shadow 0.2s; }
.card:hover { box-shadow: 0 4px 16px rgba(0,0,0,0.08); }

/* ── LESSON / PRODUCT GRID ── */
.tracker-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(320px, 1fr)); gap: 16px; margin-top: 16px; }
.tracker-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-left: 5px solid var(--violet);
  border-radius: 8px;
  padding: 18px 20px;
  text-decoration: none;
  color: var(--text);
  display: block;
  transition: box-shadow 0.2s, transform 0.2s;
}
.tracker-card:hover { box-shadow: 0 4px 20px rgba(0,0,0,0.10); transform: translateY(-2px); }
.tracker-card.free { border-left-color: var(--green); }
.tracker-card .tc-post { font-size: 10px; font-weight: 800; letter-spacing: 2px; color: var(--gray); text-transform: uppercase; margin-bottom: 4px; }
.tracker-card .tc-title { font-size: 15px; font-weight: 800; color: var(--dark); margin-bottom: 6px; line-height: 1.3; }
.tracker-card .tc-date { font-size: 12px; color: var(--subtext); margin-bottom: 10px; }
.tracker-card .tc-tags { display: flex; gap: 6px; flex-wrap: wrap; }
.tag { font-size: 10px; font-weight: 700; padding: 3px 8px; border-radius: 20px; letter-spacing: 0.5px; text-transform: uppercase; }
.tag-free { background: #e8f5e9; color: #1b5e20; }
.tag-kids { background: #fff3e0; color: #e65100; }
.tag-vin { background: #f3e5f5; color: #6a1b9a; }
.tag-sq { background: #e8f4fd; color: #0f3460; }
.tag-new { background: var(--gold); color: var(--dark); }

/* ── METHOD / ROTI BLOCK ── */
.roti-bar { background: linear-gradient(135deg, #1a1a2e 0%, #2a1240 100%); border-left: 6px solid var(--gold); border-radius: 6px; padding: 20px 24px; margin: 24px 0; color: #e6ddf0; font-size: 14px; line-height: 1.8; }
.roti-bar strong { color: var(--gold); font-size: 13px; letter-spacing: 1px; }
.roti-bar .big-num { font-size: 40px; font-weight: 900; color: var(--gold); line-height: 1; }

/* ── SUBSTACK CTA ── */
.cta-block { background: var(--violet); color: #fff; text-align: center; padding: 40px 24px; border-radius: 10px; margin: 32px 0; }
.cta-block h2 { color: var(--gold); font-size: 22px; margin-bottom: 10px; }
.cta-block p { color: #eee; margin-bottom: 20px; font-size: 14px; }
.btn-gold { display: inline-block; background: var(--gold); color: var(--dark); font-weight: 900; font-size: 14px; padding: 12px 32px; border-radius: 6px; text-decoration: none; letter-spacing: 1px; transition: opacity 0.2s; }
.btn-gold:hover { opacity: 0.85; }

/* ── FOOTER ── */
footer { background: var(--dark); color: #aaa; text-align: center; padding: 28px 20px; font-size: 11px; line-height: 1.9; border-top: 2px solid var(--gold); margin-top: 48px; }
footer .footer-brand { color: var(--gold); font-weight: 900; font-size: 14px; letter-spacing: 1px; margin-bottom: 6px; }
footer a { color: var(--gold); text-decoration: none; }

/* ── RESPONSIVE ── */
@media (max-width: 640px) {
  .hero h1 { font-size: 24px; }
  nav .nav-links { gap: 16px; }
  .tracker-grid { grid-template-columns: 1fr; }
}