/* assets/brand.css — Klavent Design System */

@import url('https://fonts.googleapis.com/css2?family=Playfair+Display:ital,wght@0,400;0,700;1,400;1,700&family=Lato:wght@300;400;700&display=swap');

/* ===== DESIGN TOKENS ===== */
:root {
  --teal-signal: #1D7874;
  --teal-signal-hover: #166560;
  --forest-night: #0D1F1E;
  --forest-night-2: #0F2421;
  --forest-night-3: #132926;
  --mint-ground: #EDFFEC;
  --terracotta: #C1502A;
  --olive-texture: #595A4A;

  /* Light mode surfaces */
  --bg: #FAFAFA;
  --bg-card: #FFFFFF;
  --bg-alt: #F3F4F0;
  --bg-input: #F6F7F3;
  --border: rgba(89,90,74,0.14);
  --border-strong: rgba(89,90,74,0.26);
  --text: #1A1C18;
  --text-soft: #44453C;
  --text-muted: #7A7B6E;
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.06);
  --shadow-md: 0 8px 28px rgba(0,0,0,0.12);
  --font-display: 'Playfair Display', Georgia, serif;
  --font-body: 'Lato', system-ui, -apple-system, sans-serif;
}

[data-theme="dark"] {
  --bg: #0D1F1E;
  --bg-card: #182E2A;
  --bg-alt: #152B27;
  --bg-input: #152B27;
  --border: rgba(255,255,255,0.08);
  --border-strong: rgba(255,255,255,0.15);
  --text: #EDFFEC;
  --text-soft: rgba(237,255,236,0.80);
  --text-muted: rgba(237,255,236,0.48);
  --shadow-sm: 0 2px 10px rgba(0,0,0,0.28);
  --shadow-md: 0 8px 28px rgba(0,0,0,0.44);
}

/* ===== RESET ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-body);
  font-weight: 400;
  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  padding-top: 70px;
}
a { text-decoration: none; color: inherit; }
img { max-width: 100%; display: block; }
h1,h2,h3,h4,h5,h6 { font-family: var(--font-display); font-weight: 700; line-height: 1.2; color: var(--text); }
p { margin: 0; }
ul { list-style: none; padding: 0; margin: 0; }
button { cursor: pointer; font-family: var(--font-body); border: none; background: none; }

/* ===== LAYOUT ===== */
.container { max-width: 1200px; margin: 0 auto; padding: 0 40px; }
@media (max-width: 600px) { .container { padding: 0 20px; } }
section { padding: 100px 0; }

/* ===== TYPOGRAPHY UTILITIES ===== */
.overline {
  display: block;
  font-family: var(--font-body);
  font-weight: 700;
  font-size: 11px;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--teal-signal);
  margin-bottom: 12px;
}
.section-head { margin-bottom: 56px; }
.section-head h2 { font-size: clamp(28px, 3.6vw, 40px); margin-bottom: 12px; }
.section-head .sub { font-weight: 300; font-size: 16px; color: var(--text-soft); }
.serif-italic { font-style: italic; }

/* ===== BUTTONS ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  font-family: var(--font-body);
  font-weight: 700;
  font-size: 14px;
  letter-spacing: 0.3px;
  padding: 12px 22px;
  border-radius: 6px;
  border: 1.5px solid transparent;
  transition: background 0.18s ease, color 0.18s ease, border-color 0.18s ease, transform 0.12s ease;
  cursor: pointer;
  line-height: 1;
  white-space: nowrap;
}
.btn-primary { background: var(--teal-signal); color: #fff; border-color: var(--teal-signal); }
.btn-primary:hover { background: var(--teal-signal-hover); border-color: var(--teal-signal-hover); }
.btn-ghost { background: transparent; color: var(--text); border-color: var(--border-strong); }
.btn-ghost:hover { border-color: var(--teal-signal); color: var(--teal-signal); }
.btn-light { background: #fff; color: var(--forest-night); border-color: #fff; }
.btn-light:hover { background: var(--mint-ground); border-color: var(--mint-ground); }
.btn-lg { padding: 15px 28px; font-size: 15px; }

/* ===== PILLS / TAGS ===== */
.pill {
  display: inline-block;
  font-family: var(--font-body);
  font-weight: 700;
  font-size: 10px;
  letter-spacing: 1.2px;
  text-transform: uppercase;
  padding: 5px 10px;
  border-radius: 4px;
  background: var(--bg-alt);
  color: var(--text-muted);
}
.pill-teal { background: rgba(29,120,116,0.12); color: var(--teal-signal); }
[data-theme="dark"] .pill-teal { background: rgba(29,120,116,0.20); }

/* ===== NAV ===== */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  height: 70px;
  background: #ffffff;
  border-bottom: 1px solid var(--border);
  transition: background 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
}
.nav.scrolled { box-shadow: 0 2px 16px rgba(0,0,0,0.08); }
.nav-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 40px;
  height: 100%;
  display: flex;
  align-items: center;
}
@media (max-width: 600px) { .nav-inner { padding: 0 20px; } }

/* Logo */
.nav-logo { display: flex; align-items: center; margin-right: auto; }
.nav-logo img { height: 34px; width: auto; }
/* Dark mode: full-colour logo on Mint Ground nav; Light mode: dark-stroke logo on white nav */
.logo-dark { display: none; }
[data-theme="light"] .logo-light { display: none; }
[data-theme="light"] .logo-dark { display: block; }

/* Desktop links */
.nav-links { display: flex; align-items: center; gap: 28px; }
.nav-links > a {
  font-family: var(--font-body);
  font-weight: 700;
  font-size: 13px;
  letter-spacing: 0.3px;
  color: var(--text);
  transition: color 0.15s ease;
}
.nav-links > a:hover,
.nav-links > a.active { color: var(--teal-signal); }

/* Dropdown */
.nav-dropdown { position: relative; }
.nav-dropdown > button {
  display: flex; align-items: center; gap: 5px;
  font-family: var(--font-body); font-weight: 700;
  font-size: 13px; letter-spacing: 0.3px;
  color: var(--text);
  background: none; border: none; padding: 0;
  cursor: pointer;
  transition: color 0.15s ease;
}
.nav-dropdown > button:hover { color: var(--teal-signal); }
.nav-dropdown-menu {
  position: absolute;
  top: calc(100% + 18px);
  left: 50%;
  transform: translateX(-50%);
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 8px;
  box-shadow: 0 8px 28px rgba(0,0,0,0.14);
  min-width: 290px;
  padding: 8px;
  display: none;
  z-index: 200;
}
[data-theme="dark"] .nav-dropdown-menu { background: var(--forest-night-3); border-color: rgba(255,255,255,0.10); }
.nav-dropdown.open .nav-dropdown-menu { display: block; }
.nav-dropdown-menu a {
  display: flex; flex-direction: column; gap: 3px;
  padding: 12px 14px; border-radius: 6px;
  font-weight: 700; font-size: 14px;
  color: var(--text);
  transition: background 0.15s ease, color 0.15s ease;
}
.nav-dropdown-menu a:hover { background: var(--bg-alt); color: var(--teal-signal); }
[data-theme="dark"] .nav-dropdown-menu a:hover { background: rgba(255,255,255,0.05); }
.nav-dropdown-menu a small {
  font-family: var(--font-body); font-weight: 300;
  font-size: 11.5px; color: var(--text-muted);
  letter-spacing: 0; text-transform: none;
}

/* Right cluster */
.nav-right { display: flex; align-items: center; gap: 12px; margin-left: 28px; }
.theme-toggle {
  width: 36px; height: 36px;
  border-radius: 6px;
  border: 1.5px solid var(--border-strong);
  background: none; color: var(--text);
  display: flex; align-items: center; justify-content: center;
  transition: border-color 0.15s ease, color 0.15s ease;
  flex-shrink: 0;
}
.theme-toggle svg { width: 16px; height: 16px; }
.theme-toggle:hover { border-color: var(--teal-signal); color: var(--teal-signal); }
.icon-sun { display: none; }
[data-theme="dark"] .icon-moon { display: none; }
[data-theme="dark"] .icon-sun { display: block; }

/* Mobile toggle */
.nav-mobile-toggle {
  display: none;
  width: 36px; height: 36px;
  align-items: center; justify-content: center;
  color: var(--text);
}
@media (max-width: 880px) {
  .nav-links { display: none; }
  .theme-toggle { display: none; }
  .nav-mobile-toggle { display: flex; }
}

/* Mobile overlay */
.nav-mobile-overlay {
  position: fixed;
  inset: 0;
  z-index: 200;
  background: var(--forest-night);
  display: flex;
  flex-direction: column;
  padding: 28px;
  transform: translateX(100%);
  transition: transform 0.3s ease;
}
.nav-mobile-overlay.open { transform: translateX(0); }
.nav-mobile-close {
  align-self: flex-end;
  width: 36px; height: 36px;
  color: rgba(237,255,236,0.8);
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 40px;
}
.nav-mobile-overlay nav { display: flex; flex-direction: column; }
.nav-mobile-overlay nav a {
  font-family: var(--font-body); font-weight: 700;
  font-size: 20px; color: rgba(237,255,236,0.88);
  padding: 14px 0;
  border-bottom: 1px solid rgba(255,255,255,0.07);
  display: block;
  transition: color 0.15s ease;
}
.nav-mobile-overlay nav a:hover { color: var(--teal-signal); }
.nav-mobile-overlay nav span.sub {
  font-family: var(--font-body); font-weight: 700;
  font-size: 10px; letter-spacing: 2px; text-transform: uppercase;
  color: rgba(237,255,236,0.35);
  padding: 18px 0 6px;
  display: block;
}
.nav-mobile-overlay nav a.sub {
  font-size: 15px; font-weight: 400;
  color: rgba(237,255,236,0.60);
  padding: 9px 0 9px 14px;
  border-bottom: none;
}

/* ===== C7 — Dark Mode Nav: Mint Ground ===== */
[data-theme="dark"] .nav {
  background-color: #EDFFEC;
  border-bottom-color: rgba(13,31,30,0.12);
}
[data-theme="dark"] .nav-links > a,
[data-theme="dark"] .nav-dropdown > button { color: #0D1F1E; }
[data-theme="dark"] .nav-links > a:hover,
[data-theme="dark"] .nav-links > a.active,
[data-theme="dark"] .nav-dropdown > button:hover { color: #1D7874; }
[data-theme="dark"] .theme-toggle { color: #0D1F1E; border-color: rgba(13,31,30,0.20); }
[data-theme="dark"] .theme-toggle:hover { color: #1D7874; border-color: #1D7874; }
[data-theme="dark"] .nav.scrolled {
  background-color: rgba(237,255,236,0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}
/* Keep CTA button teal on Mint Ground */
[data-theme="dark"] .nav .btn-primary { background: var(--teal-signal); color: #fff; }
/* Mobile toggle on Mint Ground */
[data-theme="dark"] .nav-mobile-toggle { color: #0D1F1E; }

/* ===== FOOTER ===== */
.footer {
  background: var(--forest-night);
  color: rgba(237,255,236,0.72);
  padding: 80px 0 0;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1.3fr;
  gap: 48px;
  padding-bottom: 56px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}
@media (max-width: 920px) { .footer-grid { grid-template-columns: 1fr 1fr; gap: 36px; } }
@media (max-width: 540px) { .footer-grid { grid-template-columns: 1fr; gap: 28px; } }
.footer-logo { margin-bottom: 16px; }
.footer-logo img { height: 30px; width: auto; }
.footer-tagline {
  font-family: var(--font-display); font-style: italic;
  font-size: 15px; color: rgba(237,255,236,0.88);
  margin-bottom: 8px;
}
.footer-meta { font-size: 12px; color: rgba(237,255,236,0.40); letter-spacing: 0.3px; }
.footer h4 {
  font-family: var(--font-body); font-weight: 700;
  font-size: 10px; letter-spacing: 2.5px; text-transform: uppercase;
  color: rgba(237,255,236,0.45);
  margin-bottom: 18px;
}
.footer-list { display: flex; flex-direction: column; gap: 10px; }
.footer-list a { font-size: 14px; color: rgba(237,255,236,0.70); transition: color 0.15s; }
.footer-list a:hover { color: var(--teal-signal); }
.footer-cta { display: flex; flex-direction: column; gap: 14px; }
.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  padding: 22px 0;
  font-size: 12px;
  color: rgba(237,255,236,0.30);
  letter-spacing: 0.2px;
}

/* Social icon buttons — C1 */
.social-icons { display: flex; gap: 10px; margin-top: 8px; }
.social-btn {
  width: 40px; height: 40px;
  border-radius: 50%;
  background: rgba(255,255,255,0.08);
  color: var(--teal-signal);
  display: inline-flex; align-items: center; justify-content: center;
  transition: background 0.18s ease, color 0.18s ease;
  flex-shrink: 0;
  border: 1px solid rgba(255,255,255,0.10);
}
.social-btn:hover { background: var(--teal-signal); color: #fff; border-color: var(--teal-signal); }
.social-btn svg { pointer-events: none; }

/* ===== REVEAL ANIMATIONS ===== */
.reveal { opacity: 0; transform: translateY(20px); transition: opacity 0.65s ease, transform 0.65s ease; }
.reveal.visible { opacity: 1; transform: none; }
.reveal-stagger > * { opacity: 0; transform: translateY(20px); transition: opacity 0.6s ease, transform 0.6s ease; }
.reveal-stagger > *.visible { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .reveal, .reveal-stagger > * { opacity: 1 !important; transform: none !important; transition: none !important; }
}

/* ===== A4 — FLIP CARDS ===== */
.case-card, .port-card {
  perspective: 1000px;
  cursor: default;
}
/* card-inner wraps front + back */
.card-inner {
  position: relative;
  min-height: 320px;
  transform-style: preserve-3d;
  transition: transform 0.4s ease-in-out;
}
.port-card .card-inner { min-height: 280px; }
@media (hover: hover) {
  .case-card:hover .card-inner,
  .port-card:hover .card-inner { transform: rotateY(180deg); }
}
.case-card.flipped .card-inner,
.port-card.flipped .card-inner { transform: rotateY(180deg); }
.card-front, .card-back {
  position: absolute; inset: 0;
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
  border-radius: 6px;
  padding: 30px 28px;
  display: flex; flex-direction: column;
}
.card-front {
  background: var(--bg-card);
  border: 1px solid var(--border);
}
[data-theme="dark"] .card-front { background: var(--forest-night-3); border-color: transparent; }
.card-back {
  transform: rotateY(180deg);
  background: var(--teal-signal);
  color: #fff;
  justify-content: flex-start;
  gap: 14px;
}
.card-back-tag {
  display: inline-block;
  font-family: var(--font-body); font-weight: 700;
  font-size: 10px; letter-spacing: 1.2px; text-transform: uppercase;
  background: rgba(255,255,255,0.20); color: #fff;
  padding: 5px 10px; border-radius: 4px;
  align-self: flex-start;
}
.card-back-desc {
  font-family: var(--font-body); font-weight: 400;
  font-size: 13px; color: rgba(255,255,255,0.90);
  line-height: 1.65;
  flex: 1;
}
.card-back-link {
  font-family: var(--font-body); font-weight: 700;
  font-size: 13px; color: #fff;
  display: inline-flex; align-items: center; gap: 6px;
  border-bottom: 1px solid rgba(255,255,255,0.40);
  padding-bottom: 2px;
  align-self: flex-start;
  transition: border-color 0.15s;
}
.card-back-link:hover { border-color: #fff; }