/* ══════════════════════════════════════════════════════════════════════════
   CertAnvil landing page — light/dark theme styling
   Default: light. Toggle persists to localStorage 'certanvil_theme'.
   Inline <head> script applies the theme attribute synchronously to avoid
   first-paint flash. See index.html for the bootstrap.
   ══════════════════════════════════════════════════════════════════════════ */

/* ── Theme tokens ── */
:root[data-theme="light"] {
  --bg: #fafbff;
  --bg-elevated: #ffffff;
  --surface: #ffffff;
  --surface-2: #f4f5fa;
  --surface-3: #eaecf3;
  --border: #e5e7f0;
  --border-strong: #c7c9d8;
  --text: #1a1a2e;
  --text-mid: #4a4a6e;
  --text-dim: #8a8aac;
  --accent: #5b4fdb;
  --accent-hover: #4a3fbe;
  --accent-light: #7c6ff7;
  --accent-soft-bg: rgba(91,79,219,.06);
  --accent-soft-border: rgba(91,79,219,.18);
  --green: #16a34a;
  --green-soft-bg: rgba(22,163,74,.08);
  --green-border: rgba(22,163,74,.3);
  --orange: #d97706;
  --orange-soft-bg: rgba(217,119,6,.08);
  --orange-border: rgba(217,119,6,.3);
  --cyan: #0891b2;
  --yellow: #ca8a04;
  --shadow-card: 0 1px 2px rgba(20,20,40,.04), 0 4px 12px rgba(20,20,40,.05);
  --shadow-card-hover: 0 8px 24px rgba(91,79,219,.12), 0 2px 6px rgba(20,20,40,.08);
  --shadow-cta: 0 6px 16px rgba(91,79,219,.32);
  --logo-mark-bg: linear-gradient(135deg, #1a1a2e 0%, #0a0a12 100%);
  --topbar-bg: rgba(250,251,255,.8);
  --topbar-border: rgba(229,231,240,.9);
}

:root[data-theme="dark"] {
  --bg: #0a0a12;
  --bg-elevated: #14141f;
  --surface: rgba(19,19,30,.88);
  --surface-2: rgba(26,26,40,.92);
  --surface-3: #222235;
  --border: #2e2e48;
  --border-strong: #3d3d5c;
  --text: #f0f0f8;
  --text-mid: #b0b0cc;
  --text-dim: #6b6b90;
  --accent: #7c6ff7;
  --accent-hover: #9189f9;
  --accent-light: #a99df9;
  --accent-soft-bg: rgba(124,111,247,.10);
  --accent-soft-border: rgba(124,111,247,.32);
  --green: #22c55e;
  --green-soft-bg: rgba(34,197,94,.10);
  --green-border: rgba(34,197,94,.32);
  --orange: #f59e0b;
  --orange-soft-bg: rgba(245,158,11,.10);
  --orange-border: rgba(245,158,11,.32);
  --cyan: #06b6d4;
  --yellow: #fbbf24;
  --shadow-card: 0 1px 2px rgba(0,0,0,.5);
  --shadow-card-hover: 0 12px 32px -8px rgba(124,111,247,.25);
  --shadow-cta: 0 6px 16px rgba(124,111,247,.35);
  --logo-mark-bg: linear-gradient(135deg, #1a1a2e 0%, #0a0a12 100%);
  --topbar-bg: rgba(10,10,18,.78);
  --topbar-border: rgba(46,46,72,.6);
}

/* ── Reset + base ── */
* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.55;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  transition: background-color .25s ease, color .25s ease;
}

a { color: inherit; text-decoration: none; }
button { font: inherit; border: 0; background: transparent; cursor: pointer; color: inherit; }

.container { max-width: 1100px; margin: 0 auto; padding: 0 24px; }
@media (max-width: 720px) { .container { padding: 0 16px; } }

/* ══════════════════════════════════════════════════════════════════════════
   TOPBAR
   ══════════════════════════════════════════════════════════════════════════ */
.topbar {
  position: sticky;
  top: 0;
  z-index: 50;
  background: var(--topbar-bg);
  backdrop-filter: blur(20px) saturate(1.4);
  -webkit-backdrop-filter: blur(20px) saturate(1.4);
  border-bottom: 1px solid var(--topbar-border);
}
.topbar-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 14px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}
@media (max-width: 720px) { .topbar-inner { padding: 12px 16px; } }

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
}
.logo-mark {
  width: 34px;
  height: 34px;
  background: var(--logo-mark-bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 3px;
  flex-shrink: 0;
  box-shadow: 0 2px 6px rgba(0,0,0,.18);
}
.logo-mark svg { width: 100%; height: 100%; display: block; }
.logo-name {
  font-size: 17px;
  font-weight: 800;
  letter-spacing: -.01em;
  color: var(--text);
}
.builder-pill {
  font-size: 10px;
  font-weight: 800;
  letter-spacing: .12em;
  color: var(--orange);
  background: var(--orange-soft-bg);
  border: 1px solid var(--orange-border);
  padding: 3px 8px;
  border-radius: 99px;
  text-transform: uppercase;
  margin-left: 6px;
}

.topbar-nav {
  display: flex;
  align-items: center;
  gap: 4px;
}
.nav-link {
  color: var(--text-mid);
  font-size: 14px;
  font-weight: 500;
  padding: 8px 14px;
  border-radius: 8px;
  transition: color .15s ease, background-color .15s ease;
}
.nav-link:hover {
  color: var(--text);
  background: var(--surface-2);
}
@media (max-width: 540px) {
  .topbar-nav .nav-link { display: none; }
}

.theme-toggle {
  width: 38px;
  height: 38px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  color: var(--text-mid);
  transition: color .15s ease, background-color .15s ease;
  position: relative;
}
.theme-toggle:hover {
  color: var(--text);
  background: var(--surface-2);
}
.theme-toggle:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}
.theme-icon {
  width: 18px;
  height: 18px;
  position: absolute;
  transition: opacity .2s ease, transform .25s ease;
}
:root[data-theme="light"] .theme-icon-sun { opacity: 1; transform: rotate(0); }
:root[data-theme="light"] .theme-icon-moon { opacity: 0; transform: rotate(-90deg); }
:root[data-theme="dark"] .theme-icon-sun { opacity: 0; transform: rotate(90deg); }
:root[data-theme="dark"] .theme-icon-moon { opacity: 1; transform: rotate(0); }

/* ══════════════════════════════════════════════════════════════════════════
   HERO
   ══════════════════════════════════════════════════════════════════════════ */
.hero {
  padding: 80px 0 48px;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 50% 0%, var(--accent-soft-bg) 0%, transparent 60%);
  pointer-events: none;
  z-index: -1;
}
@media (max-width: 720px) { .hero { padding: 56px 0 32px; } }

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .08em;
  color: var(--accent);
  background: var(--accent-soft-bg);
  border: 1px solid var(--accent-soft-border);
  padding: 6px 14px;
  border-radius: 99px;
  margin-bottom: 24px;
  text-transform: uppercase;
}

.hero-title {
  font-size: 60px;
  font-weight: 800;
  letter-spacing: -.025em;
  line-height: 1.04;
  color: var(--text);
  margin-bottom: 20px;
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
}
@media (max-width: 720px) { .hero-title { font-size: 38px; } }
@media (max-width: 480px) { .hero-title { font-size: 32px; } }

.hero-sub {
  font-size: 18px;
  color: var(--text-mid);
  max-width: 620px;
  margin: 0 auto;
  line-height: 1.55;
}
@media (max-width: 720px) { .hero-sub { font-size: 15px; } }

.pass-pill {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-top: 28px;
  padding: 10px 18px;
  background: linear-gradient(135deg, var(--green-soft-bg), var(--accent-soft-bg));
  border: 1px solid var(--green-border);
  border-radius: 99px;
  font-size: 13px;
  color: var(--text-mid);
  flex-wrap: wrap;
  justify-content: center;
}
@media (max-width: 540px) { .pass-pill { font-size: 12px; padding: 8px 14px; } }
.pass-pill-icon {
  width: 22px;
  height: 22px;
  background: var(--green);
  color: #fff;
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  font-weight: 800;
  flex-shrink: 0;
}
.pass-pill strong { color: var(--text); font-weight: 700; }

/* ══════════════════════════════════════════════════════════════════════════
   CERT GRID
   ══════════════════════════════════════════════════════════════════════════ */
.certs { padding: 32px 0 64px; }

.section-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 24px;
}
.section-head h2 {
  font-size: 28px;
  font-weight: 800;
  letter-spacing: -.015em;
  color: var(--text);
}
.section-help {
  font-size: 13px;
  color: var(--text-dim);
}

.cert-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 16px;
}

.cert-tile {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 24px 22px;
  display: flex;
  flex-direction: column;
  text-decoration: none;
  color: inherit;
  transition: transform .2s cubic-bezier(0.16, 1, 0.3, 1),
              box-shadow .2s ease,
              border-color .2s ease;
  cursor: pointer;
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-card);
}
.cert-tile:hover {
  transform: translateY(-3px);
  border-color: var(--accent);
  box-shadow: var(--shadow-card-hover);
}
.cert-tile:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

/* Top stripe — only on live + private tiles */
.cert-tile.is-live::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: var(--green);
}
.cert-tile.is-private::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: var(--orange);
}

.cert-tile.is-soon {
  opacity: .76;
  cursor: default;
}
.cert-tile.is-soon:hover {
  transform: none;
  border-color: var(--border);
  box-shadow: var(--shadow-card);
}

.cert-tile-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
  gap: 10px;
}
.cert-glyph {
  width: 46px;
  height: 46px;
  border-radius: 11px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 16px;
  letter-spacing: -.02em;
  flex-shrink: 0;
}
.cert-glyph-netplus {
  background: var(--logo-mark-bg);
  border: 1px solid var(--border);
  color: var(--accent-light);
}
.cert-glyph-secplus {
  background: linear-gradient(135deg, var(--orange-soft-bg), rgba(245,158,11,.02));
  border: 1px solid var(--orange-border);
  color: var(--orange);
}
.cert-glyph-az900 {
  background: linear-gradient(135deg, rgba(8,145,178,.10), rgba(8,145,178,.02));
  border: 1px solid rgba(8,145,178,.28);
  color: var(--cyan);
}
.cert-glyph-ccna {
  background: linear-gradient(135deg, var(--green-soft-bg), rgba(22,163,74,.02));
  border: 1px solid var(--green-border);
  color: var(--green);
}
.cert-glyph-aws {
  background: linear-gradient(135deg, rgba(202,138,4,.10), rgba(202,138,4,.02));
  border: 1px solid rgba(202,138,4,.28);
  color: var(--yellow);
}
.cert-glyph-az104 {
  background: linear-gradient(135deg, var(--accent-soft-bg), rgba(91,79,219,.02));
  border: 1px solid var(--accent-soft-border);
  color: var(--accent);
}

.cert-status {
  font-size: 9px;
  font-weight: 800;
  letter-spacing: .14em;
  padding: 4px 9px;
  border-radius: 99px;
  text-transform: uppercase;
  display: inline-flex;
  align-items: center;
  gap: 5px;
}
.status-live {
  background: var(--green-soft-bg);
  color: var(--green);
  border: 1px solid var(--green-border);
}
.status-live .status-dot {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--green);
  animation: livePulse 2s ease-in-out infinite;
}
.status-private {
  background: var(--orange-soft-bg);
  color: var(--orange);
  border: 1px solid var(--orange-border);
}
.status-soon {
  background: var(--surface-3);
  color: var(--text-dim);
  border: 1px solid var(--border);
}
@keyframes livePulse {
  0%, 100% { opacity: 1; }
  50% { opacity: .4; }
}

.cert-name {
  font-size: 18px;
  font-weight: 800;
  letter-spacing: -.01em;
  color: var(--text);
  margin-bottom: 4px;
}
.cert-code {
  font-size: 12px;
  font-family: 'SF Mono', 'JetBrains Mono', 'Monaco', monospace;
  color: var(--text-dim);
  margin-bottom: 14px;
}
.cert-desc {
  font-size: 13.5px;
  color: var(--text-mid);
  line-height: 1.55;
  margin-bottom: 18px;
  flex-grow: 1;
}

.cert-foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding-top: 14px;
  border-top: 1px solid var(--border);
}
.cert-progress {
  font-size: 11px;
  color: var(--text-dim);
  font-family: 'SF Mono', 'JetBrains Mono', 'Monaco', monospace;
}
.cert-cta {
  font-size: 13px;
  font-weight: 700;
  color: var(--accent);
  display: inline-flex;
  align-items: center;
  gap: 4px;
}
.cert-tile.is-soon .cert-cta { color: var(--text-dim); }
.cert-tile.is-private .cert-cta { color: var(--orange); }
.cert-cta-notify {
  background: transparent;
  padding: 0;
  cursor: pointer;
}

/* ══════════════════════════════════════════════════════════════════════════
   WHY CERTANVIL
   ══════════════════════════════════════════════════════════════════════════ */
.why { padding: 64px 0 80px; background: var(--surface-2); }
.why-title {
  font-size: 28px;
  font-weight: 800;
  letter-spacing: -.015em;
  color: var(--text);
  text-align: center;
  margin-bottom: 32px;
}

.why-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 20px;
}

.why-item {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 22px 20px;
  box-shadow: var(--shadow-card);
}
.why-glyph {
  width: 44px;
  height: 44px;
  background: var(--accent-soft-bg);
  border: 1px solid var(--accent-soft-border);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  margin-bottom: 14px;
}
.why-item h3 {
  font-size: 15px;
  font-weight: 800;
  color: var(--text);
  margin-bottom: 6px;
  letter-spacing: -.01em;
}
.why-item p {
  font-size: 13.5px;
  color: var(--text-mid);
  line-height: 1.55;
}

/* ══════════════════════════════════════════════════════════════════════════
   FOOTER
   ══════════════════════════════════════════════════════════════════════════ */
.foot {
  padding: 28px 0 36px;
  border-top: 1px solid var(--border);
  background: var(--bg);
}
.foot-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}
.foot-brand {
  font-size: 12px;
  font-family: 'SF Mono', 'JetBrains Mono', 'Monaco', monospace;
  color: var(--text-dim);
}
.foot-nav {
  display: flex;
  gap: 4px;
}
.foot-link {
  font-size: 13px;
  color: var(--text-dim);
  padding: 6px 10px;
  border-radius: 6px;
  transition: color .15s ease, background-color .15s ease;
}
.foot-link:hover {
  color: var(--text-mid);
  background: var(--surface-2);
}

/* ══════════════════════════════════════════════════════════════════════════
   NOTIFY MODAL
   ══════════════════════════════════════════════════════════════════════════ */
.modal {
  position: fixed;
  inset: 0;
  z-index: 100;
  background: rgba(10,10,18,.6);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
  opacity: 0;
  pointer-events: none;
  transition: opacity .2s ease;
}
.modal[aria-hidden="false"], .modal:not([hidden]) {
  opacity: 1;
  pointer-events: auto;
}

.modal-card {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 28px;
  max-width: 460px;
  width: 100%;
  position: relative;
  box-shadow: 0 24px 60px -12px rgba(20,20,40,.4);
}
.modal-close {
  position: absolute;
  top: 12px; right: 12px;
  width: 32px; height: 32px;
  border-radius: 8px;
  color: var(--text-dim);
  font-size: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: color .15s, background .15s;
}
.modal-close:hover {
  color: var(--text);
  background: var(--surface-2);
}
.modal-title {
  font-size: 20px;
  font-weight: 800;
  letter-spacing: -.01em;
  color: var(--text);
  margin-bottom: 8px;
  padding-right: 32px;
}
.modal-sub {
  font-size: 14px;
  color: var(--text-mid);
  line-height: 1.55;
  margin-bottom: 18px;
}
.modal-form {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 12px;
}
.modal-input {
  flex: 1;
  min-width: 200px;
  padding: 11px 14px;
  border-radius: 10px;
  border: 1px solid var(--border-strong);
  background: var(--surface);
  color: var(--text);
  font-size: 14px;
  font-family: inherit;
  transition: border-color .15s, box-shadow .15s;
}
.modal-input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft-bg);
}
.modal-cta {
  padding: 11px 18px;
  border-radius: 10px;
  background: var(--accent);
  color: #fff;
  font-weight: 700;
  font-size: 14px;
  transition: background .15s, transform .15s, box-shadow .15s;
}
.modal-cta:hover {
  background: var(--accent-hover);
  transform: translateY(-1px);
  box-shadow: var(--shadow-cta);
}
.modal-foot {
  font-size: 11px;
  color: var(--text-dim);
  line-height: 1.5;
}

/* ── Reduced motion gate ── */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: .01ms !important;
    transition-duration: .01ms !important;
  }
  .status-live .status-dot { animation: none !important; }
}
