/* ============================================
   Michigan Birding Report — Field Guide Aesthetic
   Deep forest palette with warm golden accents
   ============================================ */

:root {
  --forest-deep: #0f1a0f;
  --forest: #1a2e1a;
  --forest-mid: #243824;
  --forest-light: #2d4a2d;
  --canopy: #3a5c3a;
  --gold: #d4a03c;
  --gold-light: #e8c06a;
  --gold-dim: #a67c2e;
  --cream: #f5f0e6;
  --cream-mid: #e8e0d0;
  --cream-dark: #c8bfab;
  --bark: #6b5a42;
  --dawn: #c4785a;
  --sky: #5a8a9c;
  --font-display: 'Cormorant Garamond', Georgia, serif;
  --font-body: 'Source Sans 3', 'Segoe UI', sans-serif;
}

*, *::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(--cream);
  background: var(--forest-deep);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--gold-light); text-decoration: none; transition: color 0.2s; }
a:hover { color: var(--gold); }

/* ---- HERO ---- */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 2rem;
  background: linear-gradient(165deg, var(--forest-deep) 0%, #0d1f12 40%, #162216 70%, var(--forest) 100%);
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -30%;
  width: 80%;
  height: 200%;
  background: radial-gradient(ellipse, rgba(212,160,60,0.04) 0%, transparent 70%);
  pointer-events: none;
}

.hero-grain {
  position: absolute;
  inset: 0;
  opacity: 0.03;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)'/%3E%3C/svg%3E");
  pointer-events: none;
}

.top-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 2rem;
  background: rgba(15,26,15,0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(212,160,60,0.1);
}

.nav-logo {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--gold) !important;
  letter-spacing: 0.1em;
}

.nav-links { display: flex; gap: 1.5rem; }
.nav-links a {
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--cream-dark);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}
.nav-links a:hover { color: var(--gold); }

.hero-content {
  max-width: 800px;
  margin: 0 auto;
  text-align: center;
  padding-top: 4rem;
  animation: fadeUp 1s ease-out;
}

.hero-tag {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.2em;
  color: var(--gold);
  margin-bottom: 1rem;
}

.hero h1 {
  font-family: var(--font-display);
  font-size: clamp(3rem, 8vw, 6rem);
  font-weight: 700;
  line-height: 1.05;
  color: var(--cream);
  margin-bottom: 1.5rem;
}

.hero-sub {
  font-size: 1.1rem;
  font-weight: 300;
  color: var(--cream-dark);
  max-width: 560px;
  margin: 0 auto 2.5rem;
}

.hero-stats {
  display: flex;
  justify-content: center;
  gap: 3rem;
}

.stat { text-align: center; }
.stat-num {
  display: block;
  font-family: var(--font-display);
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--gold);
}
.stat-label {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--cream-dark);
}

.hero-scroll-hint {
  position: absolute;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  color: var(--cream-dark);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  opacity: 0.5;
  animation: bobDown 2s ease-in-out infinite;
}

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(30px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes bobDown {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50% { transform: translateX(-50%) translateY(8px); }
}

/* ---- SECTIONS ---- */
.section {
  padding: 5rem 2rem;
  max-width: 1200px;
  margin: 0 auto;
}

.section-dark {
  max-width: 100%;
  background: var(--forest);
}
.section-dark > * {
  max-width: 1200px;
  margin-left: auto;
  margin-right: auto;
}

.section-header {
  text-align: center;
  margin-bottom: 3rem;
}

.section-header h2 {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 700;
  color: var(--cream);
  margin-bottom: 0.5rem;
}

.section-sub {
  font-size: 1rem;
  color: var(--cream-dark);
  font-weight: 300;
}

/* ---- FILTERS ---- */
.region-filters {
  display: flex;
  justify-content: center;
  gap: 0.5rem;
  margin-top: 1.5rem;
  flex-wrap: wrap;
}

.filter-btn {
  padding: 0.5rem 1.2rem;
  border: 1px solid var(--canopy);
  background: transparent;
  color: var(--cream-dark);
  font-family: var(--font-body);
  font-size: 0.8rem;
  font-weight: 500;
  cursor: pointer;
  border-radius: 2px;
  transition: all 0.2s;
}

.filter-btn:hover { border-color: var(--gold-dim); color: var(--cream); }
.filter-btn.active {
  background: var(--gold);
  color: var(--forest-deep);
  border-color: var(--gold);
  font-weight: 600;
}

/* ---- SIGHTINGS GRID ---- */
.sightings-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.5rem;
}

.sighting-card {
  background: var(--forest);
  border: 1px solid rgba(212,160,60,0.1);
  border-radius: 4px;
  overflow: hidden;
  transition: transform 0.2s, border-color 0.2s;
  animation: fadeUp 0.5s ease-out both;
}

.sighting-card:hover {
  transform: translateY(-3px);
  border-color: rgba(212,160,60,0.3);
}

.sighting-img {
  width: 100%;
  height: 180px;
  object-fit: cover;
  background: var(--forest-mid);
  display: block;
}

.sighting-body {
  padding: 1rem 1.2rem;
}

.sighting-name {
  font-family: var(--font-display);
  font-size: 1.3rem;
  font-weight: 600;
  color: var(--cream);
  margin-bottom: 0.15rem;
}

.sighting-sci {
  font-style: italic;
  font-size: 0.8rem;
  color: var(--cream-dark);
  margin-bottom: 0.75rem;
}

.sighting-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  font-size: 0.75rem;
  color: var(--cream-dark);
}

.sighting-meta span {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
}

.meta-tag {
  background: rgba(212,160,60,0.15);
  color: var(--gold-light);
  padding: 0.15rem 0.5rem;
  border-radius: 2px;
  font-weight: 500;
}

/* ---- SAGINAW BAY ---- */
.bay-hero {
  padding: 2rem 0;
}

.bay-tag {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.2em;
  color: var(--gold);
  margin-bottom: 0.75rem;
}

.bay-content h2 {
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 5vw, 4rem);
  font-weight: 700;
  margin-bottom: 1rem;
}

.bay-desc {
  font-size: 1.05rem;
  font-weight: 300;
  color: var(--cream-dark);
  max-width: 600px;
  margin-bottom: 2rem;
}

.bay-hotspots {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 1rem;
  margin-bottom: 2rem;
}

.bay-hotspot-card {
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(212,160,60,0.12);
  border-radius: 3px;
  padding: 1rem;
  transition: border-color 0.2s;
}

.bay-hotspot-card:hover {
  border-color: rgba(212,160,60,0.3);
}

.bay-hotspot-name {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--cream);
  margin-bottom: 0.3rem;
}

.bay-hotspot-species {
  font-size: 0.8rem;
  color: var(--gold-light);
}

.bay-hotspot-recent {
  font-size: 0.75rem;
  color: var(--cream-dark);
  margin-top: 0.3rem;
}

/* ---- BUTTONS ---- */
.btn {
  display: inline-block;
  padding: 0.75rem 1.8rem;
  font-family: var(--font-body);
  font-size: 0.85rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  border-radius: 2px;
  cursor: pointer;
  transition: all 0.2s;
}

.btn-primary {
  background: var(--gold);
  color: var(--forest-deep);
  border: none;
}
.btn-primary:hover {
  background: var(--gold-light);
  color: var(--forest-deep) !important;
}

.btn-outline {
  background: transparent;
  border: 1px solid var(--gold-dim);
  color: var(--gold-light);
}
.btn-outline:hover {
  background: var(--gold);
  color: var(--forest-deep) !important;
  border-color: var(--gold);
}

/* ---- MIGRATION ---- */
.migration-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1.5rem;
}

.migration-card {
  background: var(--forest);
  border: 1px solid rgba(212,160,60,0.1);
  border-radius: 4px;
  padding: 2rem;
}

.migration-card h3 {
  font-family: var(--font-display);
  font-size: 1.4rem;
  font-weight: 600;
  color: var(--gold);
  margin-bottom: 0.75rem;
}

.migration-card p {
  font-size: 0.9rem;
  color: var(--cream-dark);
  margin-bottom: 1.25rem;
  line-height: 1.6;
}

.migration-season-note {
  text-align: center;
  margin-top: 2rem;
  padding: 1rem;
  font-size: 0.85rem;
  color: var(--cream-dark);
  font-style: italic;
}

/* ---- REGIONS ---- */
.regions-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1.5rem;
  padding: 0 2rem;
}

.region-card {
  background: rgba(255,255,255,0.03);
  border: 1px solid rgba(212,160,60,0.08);
  border-radius: 4px;
  padding: 2rem;
  transition: border-color 0.2s;
}

.region-card:hover { border-color: rgba(212,160,60,0.25); }

.region-icon { font-size: 2rem; margin-bottom: 1rem; }

.region-card h3 {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--cream);
  margin-bottom: 0.75rem;
}

.region-card p {
  font-size: 0.9rem;
  color: var(--cream-dark);
  line-height: 1.6;
}

.region-recent {
  margin-top: 1rem;
  font-size: 0.8rem;
  color: var(--gold-light);
}

/* ---- CALENDAR ---- */
.calendar-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1rem;
}

.calendar-item {
  padding: 1.25rem;
  border-left: 3px solid var(--gold-dim);
  background: rgba(255,255,255,0.02);
}

.calendar-months {
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--gold);
  margin-bottom: 0.35rem;
}

.calendar-event {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--cream);
  margin-bottom: 0.25rem;
}

.calendar-desc {
  font-size: 0.8rem;
  color: var(--cream-dark);
}

/* ---- LOADING ---- */
.loading-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
  padding: 3rem;
  color: var(--cream-dark);
  grid-column: 1 / -1;
}

.loading-spinner {
  width: 32px;
  height: 32px;
  border: 2px solid var(--canopy);
  border-top-color: var(--gold);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

@keyframes spin { to { transform: rotate(360deg); } }

.error-state {
  text-align: center;
  padding: 2rem;
  color: var(--dawn);
  grid-column: 1 / -1;
}

/* ---- FORECAST ---- */
.forecast-card {
  max-width: 700px;
  margin: 0 auto;
  padding: 2.5rem;
  background: rgba(255,255,255,0.03);
  border: 1px solid rgba(212,160,60,0.15);
  border-radius: 4px;
  font-size: 1rem;
  line-height: 1.75;
  color: var(--cream);
}

.forecast-card p { margin-bottom: 0.75rem; }
.forecast-card p:last-child { margin-bottom: 0; }

.forecast-meta {
  margin-top: 1.25rem;
  padding-top: 1rem;
  border-top: 1px solid rgba(212,160,60,0.1);
  font-size: 0.75rem;
  color: var(--cream-dark);
}

/* ---- GEAR ---- */
.gear-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 1.5rem;
}

.gear-card {
  display: block;
  padding: 1.75rem;
  background: var(--forest);
  border: 1px solid rgba(212,160,60,0.1);
  border-radius: 4px;
  color: var(--cream);
  transition: border-color 0.2s, transform 0.2s;
}

.gear-card:hover {
  border-color: rgba(212,160,60,0.35);
  transform: translateY(-2px);
  color: var(--cream);
}

.gear-icon { font-size: 2rem; margin-bottom: 0.75rem; }

.gear-card h3 {
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--gold);
  margin-bottom: 0.5rem;
}

.gear-card p {
  font-size: 0.85rem;
  color: var(--cream-dark);
  line-height: 1.5;
  margin-bottom: 0.75rem;
}

.gear-cta {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--gold-light);
}

/* ---- FOOTER ---- */
.footer {
  padding: 3rem 2rem;
  border-top: 1px solid rgba(212,160,60,0.1);
  background: var(--forest-deep);
}

.footer-content {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 2rem;
  flex-wrap: wrap;
}

.footer-brand h3 {
  font-family: var(--font-display);
  font-size: 1.3rem;
  color: var(--gold);
  margin-bottom: 0.5rem;
}

.footer-brand p {
  font-size: 0.8rem;
  color: var(--cream-dark);
  max-width: 500px;
  line-height: 1.6;
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.footer-links a {
  font-size: 0.8rem;
  color: var(--cream-dark);
}

/* ---- RESPONSIVE ---- */
@media (max-width: 768px) {
  .hero { padding: 1.5rem; }
  .hero-stats { gap: 1.5rem; }
  .stat-num { font-size: 2rem; }
  .nav-links { gap: 0.75rem; }
  .nav-links a { font-size: 0.7rem; }
  .section { padding: 3rem 1.5rem; }
  .sightings-grid { grid-template-columns: 1fr; }
  .regions-grid { grid-template-columns: 1fr; padding: 0; }
  .migration-grid { grid-template-columns: 1fr; }
  .footer-content { flex-direction: column; }
  .hero-scroll-hint { display: none; }
}

/* ---- PLACEHOLDER SVG ---- */
.placeholder-img {
  width: 100%;
  height: 180px;
  background: var(--forest-mid);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--canopy);
}