/* ═══════════════════════════════════════════════════════════
   EduSpark — Public Marketing Pages
   public.css · Shared tokens, nav, footer for all public pages.
   Load after vars.css.
   ═══════════════════════════════════════════════════════════ */

/* ── Dark-first palette (overrides vars.css light defaults) ── */
:root {
  --bg:       #0a0f1e;
  --card:     #111827;
  --panel:    #1a2235;
  --border:   rgba(255, 255, 255, 0.07);
  --text:     #f1f5f9;
  --text2:    #cbd5e1;
  --text3:    #8892a4;
  --accent:   #f97316;
  --accent-h: #ea580c;
  --accent-l: rgba(249, 115, 22, 0.12);
  --green:    #22c55e;
  --green-l:  rgba(34, 197, 94, 0.12);
  --red:      #ef4444;
  --red-l:    rgba(239, 68, 68, 0.12);
  --cyan:     #06b6d4;
  --cyan-l:   rgba(6, 182, 212, 0.12);
  --purple:   #a78bfa;
  --purple-l: rgba(167, 139, 250, 0.12);
  /* Aliases used in public page markup */
  --accent2:  var(--cyan);
  --accent3:  var(--purple);
}

/* ── Light-mode overrides (public pages are dark-first via :root above) ── */
[data-theme="light"] {
  --bg:     #f4f6fc;
  --card:   #ffffff;
  --panel:  #eef1f8;
  --border: rgba(0, 0, 0, 0.1);
  --text:   #0f172a;
  --text2:  #475569;
  --text3:  #94a3b8;
  --muted:  #475569;
}
[data-theme="light"] nav  { background: rgba(255,255,255,0.92); }
[data-theme="light"] .pub-lang-btn { border-color: rgba(0,0,0,0.2); color: rgba(0,0,0,0.5); }
[data-theme="light"] .pub-lang-btn:hover,
[data-theme="light"] .pub-lang-btn.active { border-color: var(--accent); color: var(--accent); }
[data-theme="light"] .nav-ghost-btn { border-color: rgba(0,0,0,0.2); color: var(--text); }

/* ── Base ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body { background: var(--bg); color: var(--text); font-family: var(--sans); overflow-x: hidden; }

/* ── Nav ── */
nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  display: flex; align-items: center;
  padding: 0 4rem; height: 68px;
  background: rgba(10, 15, 30, 0.85); backdrop-filter: blur(18px);
  border-bottom: 1px solid var(--border);
}
.logo { display: flex; align-items: center; font-family: var(--display); font-weight: 800; font-size: 1.4rem; letter-spacing: -0.02em; color: var(--text); text-decoration: none; flex: 1; }
.logo span { color: var(--accent); }
.nav-links { display: flex; align-items: center; gap: 1.5rem; list-style: none; }
.nav-links a { color: var(--text2); text-decoration: none; font-size: 0.85rem; font-weight: 600; transition: color 0.2s; }
.nav-links a:hover { color: var(--text); }
.nav-links a.active { color: var(--accent); }
.nav-right-group { display: flex; align-items: center; gap: 0.5rem; flex: 1; justify-content: flex-end; }
.nav-ghost-btn { color: var(--text) !important; padding: 0.5rem 1rem; border-radius: 50px; font-weight: 500 !important; border: 1.5px solid rgba(255, 255, 255, 0.15); text-decoration: none; font-size: 0.9rem; transition: border-color 0.2s; }
.nav-ghost-btn:hover { border-color: var(--accent); }
.nav-cta { background: var(--accent); color: #fff !important; padding: 0.5rem 1.3rem; border-radius: 50px; font-weight: 500 !important; text-decoration: none; font-size: 0.9rem; transition: opacity 0.15s; }
.nav-cta:hover { opacity: 0.9; }
.nav-dashboard-btn { background: var(--accent); color: #fff !important; padding: 0.5rem 1.3rem; border-radius: 50px; font-weight: 600 !important; text-decoration: none; font-size: 0.9rem; display: flex; align-items: center; gap: 0.4rem; }
.pub-lang { display: flex; align-items: center; gap: 0.15rem; }
.pub-lang-btn { padding: 0.28rem 0.52rem; border: 1.5px solid rgba(255,255,255,0.2); border-radius: 6px; background: transparent; color: rgba(255,255,255,0.6); font-size: 0.72rem; font-weight: 700; cursor: pointer; font-family: var(--sans); transition: all 0.15s; line-height: 1; }
.pub-lang-btn:hover, .pub-lang-btn.active { border-color: var(--accent); color: var(--accent); }

/* ── Mobile hamburger ── */
.nav-mob-btn { display: none; flex-direction: column; justify-content: center; gap: 5px; width: 38px; height: 38px; background: none; border: none; cursor: pointer; padding: 6px; border-radius: 8px; }
.nav-mob-btn span { display: block; height: 2px; background: var(--text); border-radius: 2px; transition: transform .2s, opacity .2s; }
.nav-mob-btn.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-mob-btn.open span:nth-child(2) { opacity: 0; }
.nav-mob-btn.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
.nav-drawer { display: none; position: fixed; top: 68px; left: 0; right: 0; background: var(--bg); border-bottom: 1px solid var(--border); z-index: 99; padding: 1rem 1.5rem 1.5rem; flex-direction: column; }
.nav-drawer.open { display: flex; }
.nav-drawer a { color: var(--muted); text-decoration: none; font-size: .95rem; font-weight: 500; padding: .65rem 0; border-bottom: 1px solid var(--border); transition: color .2s; }
.nav-drawer a:hover, .nav-drawer a.active { color: var(--text); }
.nav-drawer-auth { display: flex; gap: .75rem; margin-top: .75rem; }
.nav-drawer-auth a { border-bottom: none !important; padding: 0 !important; }

/* ── Main ── */
main { padding-top: 68px; }

/* ── Footer ── */
footer { border-top: 1px solid var(--border); padding: 3.5rem 4rem 2rem; }
.footer-inner { display: grid; grid-template-columns: 1.6fr repeat(3, 1fr); gap: 3rem; max-width: 1100px; margin: 0 auto 2.5rem; }
.footer-logo { display: flex; align-items: center; gap: 0.45rem; font-family: var(--display); font-weight: 800; font-size: 1.2rem; text-decoration: none; color: var(--text); }
.footer-logo span { color: var(--accent); }
.footer-brand-sub { color: var(--muted); font-size: 0.85rem; line-height: 1.6; margin-top: 0.5rem; max-width: 200px; }
.footer-col-title { font-size: 0.72rem; font-weight: 700; letter-spacing: 0.1em; text-transform: uppercase; color: var(--muted); margin-bottom: 1rem; }
.footer-col-links { display: flex; flex-direction: column; gap: 0.6rem; }
.footer-col-links a { color: var(--muted); text-decoration: none; font-size: 0.875rem; transition: color 0.2s; }
.footer-col-links a:hover { color: var(--text); }
.footer-bottom { border-top: 1px solid var(--border); padding-top: 1.5rem; display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 0.75rem; max-width: 1100px; margin: 0 auto; }
.footer-copy { color: var(--muted); font-size: 0.8rem; }

/* ── Shared utilities ── */
.page-tag { display: inline-block; font-size: 0.75rem; font-weight: 600; letter-spacing: 0.12em; text-transform: uppercase; color: var(--accent2); margin-bottom: 1rem; }

/* ── Responsive ── */
@media (max-width: 768px) {
  nav { padding: 0 1rem; }
  .nav-links { display: none; }
  .nav-mob-btn { display: flex; }
  footer { padding: 2.5rem 1.5rem 1.5rem; }
  .footer-inner { grid-template-columns: 1fr 1fr; }
}