/* ============================================================
   Bird Population Decline AI — Design System
   Professional dark theme with emerald/cyan accents
   ============================================================ */

:root {
  --bg-0: #060b16;
  --bg-1: #0b1424;
  --bg-2: #101c33;
  --surface: rgba(18, 28, 48, 0.72);
  --surface-solid: #111c30;
  --border: rgba(120, 160, 220, 0.16);
  --border-strong: rgba(120, 160, 220, 0.32);

  --text: #e8eef7;
  --text-dim: #9fb0c8;
  --text-faint: #64748b;

  --emerald: #10b981;
  --cyan: #06b6d4;
  --lime: #4ade80;
  --amber: #f59e0b;
  --red: #ef4444;

  --grad: linear-gradient(90deg, #10b981, #06b6d4 55%, #4ade80);
  --grad-soft: linear-gradient(135deg, rgba(16, 185, 129, 0.16), rgba(6, 182, 212, 0.16));

  --radius: 16px;
  --radius-lg: 22px;
  --shadow: 0 20px 50px rgba(0, 0, 0, 0.45);
  --shadow-lg: 0 30px 70px rgba(0, 0, 0, 0.55);
  --font: "Inter", "Segoe UI", system-ui, -apple-system, sans-serif;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--font);
  color: var(--text);
  background:
    radial-gradient(1000px 700px at 12% -5%, rgba(16, 185, 129, 0.10), transparent 60%),
    radial-gradient(900px 600px at 100% 0%, rgba(6, 182, 212, 0.10), transparent 55%),
    linear-gradient(180deg, var(--bg-1) 0%, var(--bg-0) 100%);
  background-attachment: fixed;
  min-height: 100vh;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--cyan); text-decoration: none; }
a:hover { color: var(--lime); }

.gradient-text {
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.85rem 1.6rem;
  border-radius: 999px;
  font-weight: 700;
  font-size: 0.98rem;
  border: none;
  cursor: pointer;
  transition: transform 0.25s ease, box-shadow 0.25s ease, background-position 0.4s ease;
  font-family: inherit;
}
.btn-primary {
  background: var(--grad);
  background-size: 200%;
  color: #04121a;
  box-shadow: 0 12px 30px rgba(16, 185, 129, 0.35);
}
.btn-primary:hover {
  transform: translateY(-3px);
  background-position: 100%;
  box-shadow: 0 18px 44px rgba(16, 185, 129, 0.5);
  color: #04121a;
}
.btn-ghost {
  background: rgba(255, 255, 255, 0.05);
  color: var(--text);
  border: 1px solid var(--border-strong);
}
.btn-ghost:hover { background: rgba(255, 255, 255, 0.1); transform: translateY(-2px); color: var(--text); }
.btn:disabled { opacity: 0.55; cursor: not-allowed; transform: none; box-shadow: none; }

/* ---------- Cards ---------- */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.8rem;
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  box-shadow: var(--shadow);
}

/* ============================================================
   NAVBAR
   ============================================================ */
.navbar {
  position: sticky;
  top: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 2rem;
  background: rgba(6, 11, 22, 0.7);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
}
.brand { display: flex; align-items: center; gap: 0.65rem; font-weight: 800; font-size: 1.15rem; letter-spacing: -0.3px; }
.brand .logo {
  width: 34px; height: 34px; border-radius: 10px;
  display: grid; place-items: center;
  background: var(--grad); font-size: 1.1rem;
  box-shadow: 0 8px 20px rgba(16, 185, 129, 0.4);
}
.nav-links { display: flex; align-items: center; gap: 1.6rem; }
.nav-links a { color: var(--text-dim); font-weight: 600; font-size: 0.95rem; }
.nav-links a:hover { color: var(--text); }

/* ============================================================
   LANDING PAGE
   ============================================================ */
.hero {
  text-align: center;
  padding: 6rem 1.5rem 4rem;
  position: relative;
}
.hero .eyebrow {
  display: inline-block;
  padding: 0.4rem 1rem;
  border-radius: 999px;
  background: var(--grad-soft);
  border: 1px solid var(--border-strong);
  color: var(--lime);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin-bottom: 1.5rem;
}
.hero h1 {
  font-size: clamp(2.4rem, 6vw, 4.2rem);
  font-weight: 900;
  letter-spacing: -1.5px;
  line-height: 1.05;
  margin-bottom: 1.3rem;
}
.hero p.lead {
  max-width: 720px;
  margin: 0 auto 2.2rem;
  font-size: 1.15rem;
  color: var(--text-dim);
  font-weight: 300;
}
.hero-actions { display: flex; gap: 1rem; justify-content: center; flex-wrap: wrap; }

.section { max-width: 1160px; margin: 0 auto; padding: 4rem 1.5rem; }
.section-head { text-align: center; margin-bottom: 3rem; }
.section-head h2 { font-size: clamp(1.8rem, 3.5vw, 2.6rem); font-weight: 800; letter-spacing: -0.5px; margin-bottom: 0.8rem; }
.section-head p { color: var(--text-dim); max-width: 620px; margin: 0 auto; }

.grid { display: grid; gap: 1.4rem; }
.grid-3 { grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); }
.grid-2 { grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); }

.feature {
  transition: transform 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}
.feature:hover { transform: translateY(-6px); border-color: var(--border-strong); box-shadow: var(--shadow-lg); }
.feature .ficon {
  width: 52px; height: 52px; border-radius: 14px;
  display: grid; place-items: center; font-size: 1.5rem;
  background: var(--grad-soft); border: 1px solid var(--border-strong);
  margin-bottom: 1.1rem;
}
.feature h3 { font-size: 1.2rem; margin-bottom: 0.5rem; }
.feature p { color: var(--text-dim); font-size: 0.96rem; }

/* Steps */
.steps { counter-reset: step; }
.step { display: flex; gap: 1.2rem; align-items: flex-start; }
.step .num {
  flex: none; width: 42px; height: 42px; border-radius: 12px;
  display: grid; place-items: center; font-weight: 800;
  background: var(--grad); color: #04121a;
}
.step h3 { font-size: 1.1rem; margin-bottom: 0.3rem; }
.step p { color: var(--text-dim); font-size: 0.95rem; }

.cta-band {
  text-align: center;
  background: var(--grad-soft);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-lg);
  padding: 3.5rem 2rem;
}
.cta-band h2 { font-size: clamp(1.8rem, 4vw, 2.6rem); font-weight: 800; margin-bottom: 0.8rem; }
.cta-band p { color: var(--text-dim); margin-bottom: 1.8rem; }

.pill {
  display: inline-block; margin: 0.3rem;
  padding: 0.5rem 1.05rem; border-radius: 999px;
  background: var(--grad-soft); border: 1px solid var(--border-strong);
  font-size: 0.85rem; font-weight: 600;
}

.site-footer {
  border-top: 1px solid var(--border);
  padding: 2.5rem 1.5rem;
  text-align: center;
  color: var(--text-faint);
  font-size: 0.9rem;
}

/* ============================================================
   LOGIN OVERLAY
   ============================================================ */
.login-overlay {
  position: fixed; inset: 0; z-index: 100;
  display: grid; place-items: center;
  padding: 1.5rem;
  background:
    radial-gradient(800px 500px at 50% 0%, rgba(16, 185, 129, 0.12), transparent 60%),
    rgba(4, 8, 16, 0.92);
  backdrop-filter: blur(6px);
}
.login-card { width: 100%; max-width: 420px; text-align: center; }
.login-card .logo-lg {
  width: 64px; height: 64px; border-radius: 18px; margin: 0 auto 1.2rem;
  display: grid; place-items: center; font-size: 2rem;
  background: var(--grad); box-shadow: 0 14px 34px rgba(16, 185, 129, 0.45);
}
.login-card h2 { font-size: 1.6rem; margin-bottom: 0.4rem; }
.login-card .sub { color: var(--text-dim); font-size: 0.95rem; margin-bottom: 1.6rem; }
.demo-hint {
  background: var(--grad-soft); border: 1px dashed var(--border-strong);
  border-radius: 12px; padding: 0.7rem; font-size: 0.85rem; color: var(--text-dim);
  margin-bottom: 1.4rem;
}
.demo-hint b { color: var(--lime); }

.field { text-align: left; margin-bottom: 1rem; }
.field label { display: block; font-size: 0.85rem; color: var(--text-dim); margin-bottom: 0.4rem; font-weight: 600; }
.input {
  width: 100%; padding: 0.8rem 1rem; border-radius: 12px;
  background: rgba(255, 255, 255, 0.04); border: 1px solid var(--border-strong);
  color: var(--text); font-size: 0.98rem; font-family: inherit;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}
.input:focus { outline: none; border-color: var(--emerald); box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.18); }
.form-error { color: var(--red); font-size: 0.88rem; min-height: 1.2rem; margin-bottom: 0.6rem; }

/* ============================================================
   DASHBOARD
   ============================================================ */
.dash { display: none; }
.dash.active { display: block; }

.dash-tabs {
  display: flex; gap: 0.5rem; flex-wrap: wrap;
  max-width: 1300px; margin: 1.5rem auto 0; padding: 0 1.5rem;
}
.tab-btn {
  padding: 0.7rem 1.3rem; border-radius: 12px 12px 0 0;
  background: transparent; border: none; cursor: pointer;
  color: var(--text-dim); font-weight: 700; font-size: 0.95rem; font-family: inherit;
  border-bottom: 3px solid transparent; transition: all 0.2s ease;
}
.tab-btn:hover { color: var(--text); background: rgba(255, 255, 255, 0.04); }
.tab-btn.active { color: var(--emerald); border-bottom-color: var(--emerald); background: var(--grad-soft); }

.dash-body { max-width: 1300px; margin: 0 auto; padding: 1.5rem; }
.tab-panel { display: none; animation: fadeIn 0.4s ease; }
.tab-panel.active { display: block; }
@keyframes fadeIn { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: none; } }

.panel-title { font-size: 1.5rem; font-weight: 800; margin-bottom: 0.4rem; }
.panel-sub { color: var(--text-dim); margin-bottom: 1.4rem; }

#map { width: 100%; height: 460px; border-radius: var(--radius); overflow: hidden; border: 1px solid var(--border-strong); }

.coord-bar {
  display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 1rem;
  margin-top: 1.2rem; padding: 1rem 1.3rem;
  background: var(--grad-soft); border: 1px solid var(--border-strong); border-radius: 14px;
}
.coord-bar .coords { font-family: ui-monospace, monospace; font-size: 1rem; }

/* Metrics */
.metrics { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 1.1rem; margin: 1.4rem 0; }
.metric {
  background: var(--grad-soft); border: 1px solid var(--border-strong);
  border-radius: var(--radius); padding: 1.3rem; text-align: center;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}
.metric:hover { transform: translateY(-5px); box-shadow: 0 16px 36px rgba(16, 185, 129, 0.2); }
.metric .mlabel { font-size: 0.75rem; text-transform: uppercase; letter-spacing: 0.06em; color: var(--text-dim); font-weight: 700; margin-bottom: 0.5rem; }
.metric .mvalue { font-size: 2rem; font-weight: 800; }
.metric .mnote { font-size: 0.8rem; color: var(--text-dim); margin-top: 0.4rem; }

/* Index image grid */
.img-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 1.2rem; }
.img-tile { text-align: center; }
.img-tile img {
  width: 100%; border-radius: 14px; border: 1px solid var(--border-strong);
  background: var(--bg-2); image-rendering: auto; aspect-ratio: 1 / 1; object-fit: cover;
}
.img-tile .caption { margin-top: 0.6rem; font-weight: 700; }
.img-tile .caption small { display: block; color: var(--text-dim); font-weight: 400; font-size: 0.8rem; }

.info-box {
  background: rgba(6, 182, 212, 0.08); border-left: 4px solid var(--cyan);
  padding: 0.9rem 1.1rem; border-radius: 10px; margin: 1rem 0; font-size: 0.93rem; color: var(--text-dim);
}
.badge {
  display: inline-block; padding: 0.5rem 1.1rem; border-radius: 999px; font-weight: 700;
  background: var(--grad-soft); border: 1px solid var(--border-strong);
}

.row { display: flex; gap: 1rem; flex-wrap: wrap; align-items: flex-end; }
.row .field { flex: 1; min-width: 180px; margin-bottom: 0; }

/* Loader */
.loader {
  width: 46px; height: 46px; border-radius: 50%;
  border: 5px solid rgba(255, 255, 255, 0.1); border-top-color: var(--emerald);
  animation: spin 0.9s linear infinite; margin: 1.5rem auto;
}
@keyframes spin { to { transform: rotate(360deg); } }
.loading-wrap { text-align: center; color: var(--text-dim); }

.hidden { display: none !important; }

.toast {
  position: fixed; bottom: 1.5rem; left: 50%; transform: translateX(-50%);
  background: var(--surface-solid); border: 1px solid var(--border-strong);
  color: var(--text); padding: 0.9rem 1.4rem; border-radius: 12px;
  box-shadow: var(--shadow-lg); z-index: 200; max-width: 90vw;
  opacity: 0; pointer-events: none; transition: opacity 0.3s ease, transform 0.3s ease;
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(-4px); }
.toast.error { border-color: var(--red); }
.toast.success { border-color: var(--emerald); }

@media (max-width: 640px) {
  .navbar { padding: 0.9rem 1.1rem; }
  .nav-links { gap: 1rem; }
  .nav-links a.hide-sm { display: none; }
  #map { height: 340px; }
}



/* ============================================================
   ENHANCEMENTS — shared components (v2)
   Added: light theme, condensing navbar, scroll-reveal,
   skeletons, risk gauge, accordion, stat band, index legend,
   content pages (prose/formula/diagram), example cards,
   error page, theme toggle, mobile nav, reduced-motion.
   ============================================================ */

/* ---------- Light theme overrides ---------- */
[data-theme="light"] {
  --bg-0: #e9eef6;
  --bg-1: #f4f8fc;
  --bg-2: #ffffff;
  --surface: rgba(255, 255, 255, 0.82);
  --surface-solid: #ffffff;
  --border: rgba(30, 60, 110, 0.14);
  --border-strong: rgba(30, 60, 110, 0.26);
  --text: #0f1b2d;
  --text-dim: #43576f;
  --text-faint: #6b7d97;
  --shadow: 0 20px 50px rgba(20, 40, 80, 0.12);
  --shadow-lg: 0 30px 70px rgba(20, 40, 80, 0.18);
}
[data-theme="light"] a { color: #0891b2; }
[data-theme="light"] a:hover { color: #059669; }
[data-theme="light"] .navbar { background: rgba(255, 255, 255, 0.72); }
[data-theme="light"] .btn-ghost { background: rgba(20, 40, 80, 0.05); }
[data-theme="light"] .btn-ghost:hover { background: rgba(20, 40, 80, 0.1); }
[data-theme="light"] .input { background: rgba(20, 40, 80, 0.04); }
[data-theme="light"] .tab-btn:hover { background: rgba(20, 40, 80, 0.05); }
[data-theme="light"] .loader { border-color: rgba(20, 40, 80, 0.12); border-top-color: var(--emerald); }
[data-theme="light"] .skeleton {
  background: linear-gradient(90deg, rgba(20,40,80,0.06) 25%, rgba(20,40,80,0.12) 37%, rgba(20,40,80,0.06) 63%);
  background-size: 400% 100%;
}
[data-theme="light"] .login-overlay {
  background:
    radial-gradient(800px 500px at 50% 0%, rgba(16, 185, 129, 0.16), transparent 60%),
    rgba(230, 238, 248, 0.94);
}

/* smooth theme transition */
body, .navbar, .card, .input, .btn { transition: background-color 0.3s ease, color 0.3s ease, border-color 0.3s ease; }

/* ---------- Condensing navbar + theme toggle + mobile nav ---------- */
.navbar { transition: padding 0.28s ease, background 0.28s ease, box-shadow 0.28s ease; }
.navbar.scrolled { padding-top: 0.6rem; padding-bottom: 0.6rem; box-shadow: 0 10px 30px rgba(0,0,0,0.25); }

.theme-toggle {
  width: 40px; height: 40px; flex: none;
  display: grid; place-items: center;
  border-radius: 12px; cursor: pointer;
  background: rgba(255,255,255,0.06);
  border: 1px solid var(--border-strong);
  color: var(--text); font-size: 1.1rem; line-height: 1;
  transition: transform 0.2s ease, background 0.2s ease;
}
[data-theme="light"] .theme-toggle { background: rgba(20,40,80,0.05); }
.theme-toggle:hover { transform: translateY(-2px) rotate(-8deg); }
.theme-toggle .sun { display: none; }
.theme-toggle .moon { display: inline; }
[data-theme="light"] .theme-toggle .sun { display: inline; }
[data-theme="light"] .theme-toggle .moon { display: none; }

.nav-toggle {
  display: none; width: 40px; height: 40px; flex: none;
  border-radius: 12px; cursor: pointer; place-items: center;
  background: rgba(255,255,255,0.06); border: 1px solid var(--border-strong);
  color: var(--text);
}
[data-theme="light"] .nav-toggle { background: rgba(20,40,80,0.05); }
.nav-toggle span, .nav-toggle span::before, .nav-toggle span::after {
  content: ""; display: block; width: 18px; height: 2px; border-radius: 2px;
  background: var(--text); position: relative; transition: transform 0.25s ease, opacity 0.2s ease;
}
.nav-toggle span::before { position: absolute; top: -6px; }
.nav-toggle span::after { position: absolute; top: 6px; }
.nav-open .nav-toggle span { background: transparent; }
.nav-open .nav-toggle span::before { transform: translateY(6px) rotate(45deg); }
.nav-open .nav-toggle span::after { transform: translateY(-6px) rotate(-45deg); }

.nav-links a.active-link { color: var(--text); }
.nav-links a.active-link::after {
  content: ""; display: block; height: 2px; border-radius: 2px;
  background: var(--grad); margin-top: 3px;
}

@media (max-width: 820px) {
  .nav-toggle { display: grid; }
  .nav-links {
    position: absolute; top: 100%; right: 0; left: 0;
    flex-direction: column; align-items: stretch; gap: 0.2rem;
    padding: 0.8rem 1.2rem 1.2rem;
    background: var(--surface-solid);
    border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow);
    transform: translateY(-8px); opacity: 0; pointer-events: none;
    transition: opacity 0.2s ease, transform 0.2s ease;
  }
  .nav-open .nav-links { transform: none; opacity: 1; pointer-events: auto; }
  .nav-links a.hide-sm { display: block !important; padding: 0.6rem 0.2rem; }
  .nav-links .btn { justify-content: center; }
}

/* ---------- Scroll reveal ---------- */
.reveal { opacity: 0; transform: translateY(22px); transition: opacity 0.6s ease, transform 0.6s ease; }
.reveal.in { opacity: 1; transform: none; }
.reveal.d1 { transition-delay: 0.08s; }
.reveal.d2 { transition-delay: 0.16s; }
.reveal.d3 { transition-delay: 0.24s; }
.reveal.d4 { transition-delay: 0.32s; }
.reveal.d5 { transition-delay: 0.40s; }

/* ---------- Hero orbital motif ---------- */
.hero-motif {
  position: absolute; inset: 0; z-index: -1; overflow: hidden; pointer-events: none;
}
.hero-motif .planet {
  position: absolute; top: 8%; left: 50%; transform: translateX(-50%);
  width: 220px; height: 220px; border-radius: 50%;
  background: radial-gradient(circle at 35% 30%, rgba(16,185,129,0.35), rgba(6,182,212,0.12) 60%, transparent 72%);
  filter: blur(6px);
}
.hero-motif .orbit {
  position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%);
  border: 1px dashed var(--border-strong); border-radius: 50%;
}
.hero-motif .orbit.o1 { width: 380px; height: 380px; animation: spin 26s linear infinite; }
.hero-motif .orbit.o2 { width: 560px; height: 560px; animation: spin 44s linear infinite reverse; }
.hero-motif .sat {
  position: absolute; top: -6px; left: 50%; width: 12px; height: 12px; border-radius: 3px;
  background: var(--grad); box-shadow: 0 0 16px rgba(16,185,129,0.7);
}

/* ---------- Soaring eagles / flock ---------- */
.flock { position: absolute; inset: 0; }
/* Dashboard: fixed full-page flock behind all content */
.dash-flock { position: fixed; inset: 0; z-index: -1; overflow: hidden; pointer-events: none; }
.flock .bird {
  position: absolute;
  height: auto;
  opacity: 0.5;                     /* semi-transparent so photos blend in naturally */
  filter: drop-shadow(0 10px 16px rgba(0,0,0,0.35)) saturate(0.92);
  animation: soar linear infinite;
  will-change: transform;
  user-select: none;
}
/* size · vertical lane · speed · start delay — staggered for a natural flock */
.flock .b1 { width: 300px; top: 12%; animation-duration: 40s; animation-delay:   0s; opacity: 0.55; }
.flock .b2 { width: 190px; top: 30%; animation-duration: 52s; animation-delay:  -9s; opacity: 0.42; }
.flock .b3 { width: 360px; top: 40%; animation-duration: 32s; animation-delay:  -5s; opacity: 0.6; }
.flock .b4 { width: 150px; top: 8%;  animation-duration: 60s; animation-delay: -20s; opacity: 0.34; }
.flock .b5 { width: 250px; top: 52%; animation-duration: 46s; animation-delay: -27s; opacity: 0.46; }

@keyframes soar {
  0%   { transform: translateX(-14vw) translateY(0)     rotate(-3deg); }
  25%  { transform: translateX(20vw)  translateY(-14px) rotate(2deg); }
  50%  { transform: translateX(55vw)  translateY(6px)   rotate(-2deg); }
  75%  { transform: translateX(85vw)  translateY(-10px) rotate(3deg); }
  100% { transform: translateX(120vw) translateY(0)     rotate(-3deg); }
}

/* ---------- Stat band ---------- */
.stat-band {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 1rem;
  max-width: 1000px; margin: 1rem auto 0; padding: 0 1.5rem;
}
.stat {
  text-align: center; padding: 1.3rem 1rem; border-radius: var(--radius);
  background: var(--surface); border: 1px solid var(--border); backdrop-filter: blur(10px);
}
.stat .snum { font-size: 1.9rem; font-weight: 900; letter-spacing: -0.5px; }
.stat .slabel { font-size: 0.82rem; color: var(--text-dim); font-weight: 600; margin-top: 0.2rem; }

/* ---------- Skeleton loaders ---------- */
.skeleton {
  border-radius: 12px;
  background: linear-gradient(90deg, rgba(255,255,255,0.05) 25%, rgba(255,255,255,0.12) 37%, rgba(255,255,255,0.05) 63%);
  background-size: 400% 100%;
  animation: shimmer 1.4s ease infinite;
}
@keyframes shimmer { 0% { background-position: 100% 0; } 100% { background-position: -100% 0; } }
.skeleton-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 1.1rem; margin: 1.4rem 0; }
.skeleton.metric-sk { height: 118px; }
.skeleton.img-sk { aspect-ratio: 1/1; }

/* ---------- Risk gauge ---------- */
.gauge-wrap { display: flex; gap: 1.4rem; align-items: center; flex-wrap: wrap; }
.gauge {
  --pct: 0;
  --gcolor: var(--emerald);
  width: 148px; height: 148px; flex: none; border-radius: 50%;
  background: conic-gradient(var(--gcolor) calc(var(--pct) * 1%), rgba(255,255,255,0.06) 0);
  display: grid; place-items: center;
  transition: background 0.9s ease;
}
[data-theme="light"] .gauge { background: conic-gradient(var(--gcolor) calc(var(--pct) * 1%), rgba(20,40,80,0.08) 0); }
.gauge .gauge-inner {
  width: 112px; height: 112px; border-radius: 50%;
  background: var(--surface-solid); display: grid; place-items: center; text-align: center;
  border: 1px solid var(--border);
}
.gauge .gauge-val { font-size: 1.9rem; font-weight: 900; line-height: 1; }
.gauge .gauge-cap { font-size: 0.68rem; text-transform: uppercase; letter-spacing: 0.08em; color: var(--text-dim); margin-top: 0.25rem; }

/* ---------- Index legend ---------- */
.legend { display: grid; grid-template-columns: repeat(auto-fit, minmax(210px, 1fr)); gap: 0.9rem; margin-top: 1rem; }
.legend-item { font-size: 0.82rem; color: var(--text-dim); }
.legend-item b { color: var(--text); display: block; margin-bottom: 0.3rem; font-size: 0.9rem; }
.legend-bar { height: 12px; border-radius: 6px; margin-bottom: 0.35rem; border: 1px solid var(--border-strong); }
.lb-ndvi { background: linear-gradient(90deg, #b91c1c, #f59e0b, #4ade80, #166534); }
.lb-ndwi { background: linear-gradient(90deg, #0e2233, #06b6d4, #67e8f9); }
.lb-ndbi { background: linear-gradient(90deg, #4c1d95, #9333ea, #f59e0b); }
.legend-scale { display: flex; justify-content: space-between; font-size: 0.72rem; color: var(--text-faint); }

/* ---------- Content pages (prose / formula / diagram) ---------- */
.page { max-width: 900px; margin: 0 auto; padding: 3rem 1.5rem 4rem; }
.page-wide { max-width: 1160px; }
.page-head { text-align: center; margin-bottom: 2.6rem; }
.page-head .eyebrow {
  display: inline-block; padding: 0.35rem 0.9rem; border-radius: 999px;
  background: var(--grad-soft); border: 1px solid var(--border-strong);
  color: var(--lime); font-size: 0.75rem; font-weight: 700; letter-spacing: 0.06em;
  text-transform: uppercase; margin-bottom: 1rem;
}
.page-head h1 { font-size: clamp(2rem, 5vw, 3rem); font-weight: 900; letter-spacing: -1px; }
.page-head p { color: var(--text-dim); max-width: 640px; margin: 0.8rem auto 0; }

.prose { color: var(--text-dim); line-height: 1.9; }
.prose h2 { color: var(--text); font-size: 1.5rem; margin: 2rem 0 0.8rem; letter-spacing: -0.4px; }
.prose h3 { color: var(--text); font-size: 1.15rem; margin: 1.4rem 0 0.5rem; }
.prose p { margin-bottom: 1rem; }
.prose ul, .prose ol { margin: 0 0 1rem 1.3rem; }
.prose li { margin-bottom: 0.5rem; }
.prose code {
  font-family: ui-monospace, monospace; font-size: 0.9em;
  background: rgba(6,182,212,0.12); padding: 0.12em 0.4em; border-radius: 6px; color: var(--text);
}

.formula {
  font-family: ui-monospace, "Cascadia Code", monospace;
  background: var(--surface); border: 1px solid var(--border-strong);
  border-left: 4px solid var(--emerald); border-radius: 12px;
  padding: 1rem 1.2rem; margin: 1rem 0; font-size: 1rem; color: var(--text); overflow-x: auto;
}
.formula .fname { color: var(--lime); font-weight: 700; }

.diagram { width: 100%; height: auto; margin: 1.4rem 0; }

/* ---------- Example location cards (explore) ---------- */
.example-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 1.4rem; }
.loc-card {
  display: block; text-align: left; cursor: pointer;
  transition: transform 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}
.loc-card:hover { transform: translateY(-6px); border-color: var(--border-strong); box-shadow: var(--shadow-lg); }
.loc-card .loc-emoji {
  width: 52px; height: 52px; border-radius: 14px; display: grid; place-items: center;
  font-size: 1.5rem; background: var(--grad-soft); border: 1px solid var(--border-strong); margin-bottom: 1rem;
}
.loc-card h3 { font-size: 1.15rem; margin-bottom: 0.25rem; color: var(--text); }
.loc-card .loc-coords { font-family: ui-monospace, monospace; font-size: 0.82rem; color: var(--text-faint); margin-bottom: 0.6rem; }
.loc-card p { color: var(--text-dim); font-size: 0.92rem; }
.loc-card .loc-go { margin-top: 0.9rem; font-weight: 700; color: var(--emerald); font-size: 0.9rem; }

/* ---------- Accordion (FAQ) ---------- */
.accordion { display: grid; gap: 0.9rem; }
.acc-item { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; }
.acc-header {
  width: 100%; text-align: left; cursor: pointer; font-family: inherit;
  display: flex; align-items: center; justify-content: space-between; gap: 1rem;
  padding: 1.1rem 1.3rem; background: transparent; border: none; color: var(--text);
  font-weight: 700; font-size: 1rem;
}
.acc-header .acc-icon { flex: none; transition: transform 0.3s ease; color: var(--emerald); font-size: 1.3rem; }
.acc-item.open .acc-header .acc-icon { transform: rotate(45deg); }
.acc-body { max-height: 0; overflow: hidden; transition: max-height 0.35s ease; }
.acc-body-inner { padding: 0 1.3rem 1.2rem; color: var(--text-dim); line-height: 1.8; }

/* ---------- Error / 404 page ---------- */
.error-page { min-height: 72vh; display: grid; place-items: center; text-align: center; padding: 3rem 1.5rem; }
.error-code {
  font-size: clamp(5rem, 20vw, 10rem); font-weight: 900; line-height: 1; letter-spacing: -3px;
}
.error-page p { color: var(--text-dim); max-width: 460px; margin: 1rem auto 2rem; }

/* ---------- Breadcrumb / back link ---------- */
.back-link { display: inline-flex; align-items: center; gap: 0.4rem; color: var(--text-dim); font-weight: 600; font-size: 0.9rem; margin-bottom: 1.4rem; }
.back-link:hover { color: var(--emerald); }

/* ---------- Reduced motion ---------- */
@media (prefers-reduced-motion: reduce) {
  * { animation-duration: 0.001ms !important; animation-iteration-count: 1 !important; transition-duration: 0.001ms !important; scroll-behavior: auto !important; }
  .reveal { opacity: 1 !important; transform: none !important; }
  .hero-motif .orbit { animation: none !important; }
  .flock .bird { animation: none !important; }
}

/* ---------- Focus visibility (a11y) ---------- */
a:focus-visible, button:focus-visible, input:focus-visible, .acc-header:focus-visible, .loc-card:focus-visible {
  outline: 2px solid var(--emerald); outline-offset: 2px; border-radius: 8px;
}



/* ============================================================
   ENHANCEMENTS v3 — dashboard tools (search, saved, chips,
   export, change detection, extra legend, toast action)
   ============================================================ */

/* Toolbar: search + actions */
.toolbar {
  display: flex; flex-wrap: wrap; gap: 0.8rem; align-items: center;
  justify-content: space-between; margin-bottom: 1rem;
}
.search-box { display: flex; gap: 0.5rem; flex: 1; min-width: 260px; }
.search-box .input { flex: 1; }
.toolbar-actions { display: flex; gap: 0.5rem; flex-wrap: wrap; }

/* Saved / recent locations */
.saved-wrap {
  display: flex; align-items: center; gap: 0.6rem; flex-wrap: wrap;
  margin-bottom: 1rem;
}
.saved-label { color: var(--text-dim); font-size: 0.85rem; font-weight: 700; }
.saved-chips { display: flex; gap: 0.5rem; flex-wrap: wrap; }
.loc-chip {
  display: inline-flex; align-items: center; gap: 0.4rem; cursor: pointer;
  padding: 0.4rem 0.8rem; border-radius: 999px; font-size: 0.85rem; font-weight: 600;
  background: var(--grad-soft); border: 1px solid var(--border-strong); color: var(--text);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}
.loc-chip:hover { transform: translateY(-2px); box-shadow: 0 8px 20px rgba(16,185,129,0.18); }
.loc-chip .x { color: var(--text-dim); font-weight: 800; padding: 0 0.15rem; }
.loc-chip .x:hover { color: var(--red); }

/* Bird species chips */
.chip-row { display: flex; gap: 0.5rem; flex-wrap: wrap; align-items: center; margin-top: 0.4rem; }
.chip-label { width: 100%; color: var(--text-dim); font-size: 0.85rem; font-weight: 700; margin-bottom: 0.2rem; }
.chip {
  display: inline-flex; align-items: center; gap: 0.35rem;
  padding: 0.35rem 0.75rem; border-radius: 999px; font-size: 0.82rem;
  background: rgba(6,182,212,0.10); border: 1px solid var(--border-strong); color: var(--text-dim);
}
.chip b { color: var(--emerald); }
.chip i { color: var(--text); font-style: italic; }

/* Export / action button row */
.btn-row { display: flex; gap: 0.7rem; flex-wrap: wrap; }

/* Extra legend bar for NDMI */
.lb-ndmi { background: linear-gradient(90deg, #8c510a, #d8b365, #f5f5f5, #5ab4ac, #01665e); }

/* Toast action button (e.g. Retry) */
.toast-action {
  margin-left: 0.9rem; padding: 0.35rem 0.9rem; border-radius: 999px; cursor: pointer;
  background: var(--grad); color: #04121a; border: none; font-weight: 800; font-size: 0.85rem;
  font-family: inherit;
}
.toast-action:hover { filter: brightness(1.08); }

/* Mapbox GL Draw polygon fill in brand colors */
.mapbox-gl-draw_polygon { cursor: crosshair; }