/*
Theme Name: RIHAAN - High Altitude Avianfauna Nepal
Theme URI: https://rihaan.org
Author: RIHAAN Research Organization
Author URI: https://rihaan.org
Description: A professional research theme for the Research in High Altitude Avianfauna Nepal (RIHAAN) organization. Designed to showcase Himalayan bird research, field studies, and scientific publications.
Version: 1.0.0
License: GNU General Public License v2 or later
License URI: http://www.gnu.org/licenses/gpl-2.0.html
Text Domain: rihaan
Tags: research, science, birds, himalaya, nepal, nature, academic
*/

/* ============================================
   CSS CUSTOM PROPERTIES
   ============================================ */
:root {
  /* Colors */
  --color-deep-forest: #0d1f0f;
  --color-pine: #1a3d1e;
  --color-moss: #2d5a27;
  --color-fern: #3d7a34;
  --color-sage: #5a9e4e;
  --color-mist: #8bc88a;
  --color-sky: #7ab8d4;
  --color-sky-deep: #2b7da8;
  --color-glacier: #c8e8f0;
  --color-snow: #f4f8f0;
  --color-gold: #c8a84b;
  --color-gold-light: #e8c86a;
  --color-cream: #faf7f0;
  --color-charcoal: #2a2a2a;
  --color-mid: #555;
  --color-light: #888;
  --color-white: #ffffff;

  /* Typography */
  --font-display: 'Cormorant Garamond', Georgia, serif;
  --font-heading: 'Playfair Display', Georgia, serif;
  --font-body: 'Source Serif 4', Georgia, serif;
  --font-label: 'Space Mono', 'Courier New', monospace;
  --font-ui: 'DM Sans', sans-serif;

  /* Spacing */
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 2rem;
  --space-lg: 4rem;
  --space-xl: 8rem;

  /* Layout */
  --max-width: 1200px;
  --nav-height: 80px;

  /* Transitions */
  --transition-fast: 0.2s ease;
  --transition-med: 0.4s ease;
  --transition-slow: 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

/* ============================================
   RESET & BASE
   ============================================ */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
}

body {
  font-family: var(--font-body);
  color: var(--color-charcoal);
  background-color: var(--color-cream);
  line-height: 1.7;
  overflow-x: hidden;
}

img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }
button { cursor: pointer; border: none; background: none; font: inherit; }

/* ============================================
   TYPOGRAPHY
   ============================================ */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.02em;
}

h1 { font-size: clamp(2.5rem, 6vw, 5rem); }
h2 { font-size: clamp(2rem, 4vw, 3.2rem); }
h3 { font-size: clamp(1.4rem, 2.5vw, 2rem); }
h4 { font-size: 1.3rem; }
h5 { font-size: 1.1rem; }

.display-text {
  font-family: var(--font-display);
  font-weight: 300;
  letter-spacing: 0.01em;
}

.label {
  font-family: var(--font-label);
  font-size: 0.75rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
}

.body-large { font-size: 1.15rem; line-height: 1.8; }

/* ============================================
   UTILITIES
   ============================================ */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-md);
}

.container-wide {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 var(--space-md);
}

.section-padding { padding: var(--space-xl) 0; }
.section-padding-md { padding: var(--space-lg) 0; }

.text-center { text-align: center; }
.text-gold { color: var(--color-gold); }
.text-mist { color: var(--color-mist); }
.text-sky { color: var(--color-sky); }
.text-white { color: var(--color-white); }
.text-mid { color: var(--color-mid); }

.bg-forest { background-color: var(--color-deep-forest); }
.bg-pine { background-color: var(--color-pine); }
.bg-snow { background-color: var(--color-snow); }
.bg-cream { background-color: var(--color-cream); }
.bg-white { background-color: var(--color-white); }

.visually-hidden {
  position: absolute; width: 1px; height: 1px;
  overflow: hidden; clip: rect(0,0,0,0);
}

/* ============================================
   BUTTONS
   ============================================ */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.85rem 2rem;
  font-family: var(--font-ui);
  font-size: 0.9rem;
  font-weight: 500;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  transition: all var(--transition-med);
  border-radius: 2px;
}

.btn-primary {
  background: var(--color-gold);
  color: var(--color-deep-forest);
}
.btn-primary:hover {
  background: var(--color-gold-light);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(200,168,75,0.35);
}

.btn-outline {
  border: 1.5px solid var(--color-white);
  color: var(--color-white);
}
.btn-outline:hover {
  background: var(--color-white);
  color: var(--color-deep-forest);
}

.btn-outline-dark {
  border: 1.5px solid var(--color-pine);
  color: var(--color-pine);
}
.btn-outline-dark:hover {
  background: var(--color-pine);
  color: var(--color-white);
}

.btn-ghost {
  color: var(--color-gold);
  padding-left: 0;
  padding-right: 0;
}
.btn-ghost::after {
  content: '→';
  transition: transform var(--transition-fast);
}
.btn-ghost:hover::after { transform: translateX(6px); }

.btn-icon {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0;
}

/* ============================================
   NAVIGATION
   ============================================ */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--nav-height);
  transition: background var(--transition-med), box-shadow var(--transition-med);
}

.site-header.scrolled {
  background: rgba(13, 31, 15, 0.97);
  backdrop-filter: blur(12px);
  box-shadow: 0 2px 30px rgba(0,0,0,0.3);
}

.nav-container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-md);
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.site-logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  color: var(--color-white);
  z-index: 1;
}

.logo-mark {
  width: 44px;
  height: 44px;
  background: var(--color-gold);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-size: 1.5rem;
  color: var(--color-deep-forest);
  font-weight: 700;
  flex-shrink: 0;
}

.logo-text-main {
  font-family: var(--font-display);
  font-size: 1.8rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  line-height: 1;
}

.logo-text-sub {
  font-family: var(--font-label);
  font-size: 0.6rem;
  letter-spacing: 0.18em;
  color: var(--color-mist);
  line-height: 1;
  display: block;
  margin-top: 3px;
}

.main-nav { display: flex; align-items: center; gap: 0.25rem; }

.main-nav a {
  font-family: var(--font-ui);
  font-size: 0.88rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  color: rgba(255,255,255,0.85);
  padding: 0.5rem 0.85rem;
  border-radius: 4px;
  transition: color var(--transition-fast), background var(--transition-fast);
  position: relative;
}

.main-nav a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  width: 0;
  height: 2px;
  background: var(--color-gold);
  transform: translateX(-50%);
  transition: width var(--transition-fast);
}

.main-nav a:hover { color: var(--color-white); }
.main-nav a:hover::after { width: 80%; }
.main-nav a.active { color: var(--color-gold); }

.nav-cta {
  background: var(--color-gold);
  color: var(--color-deep-forest) !important;
  padding: 0.5rem 1.25rem !important;
  border-radius: 3px;
}
.nav-cta:hover { background: var(--color-gold-light) !important; }
.nav-cta::after { display: none !important; }

.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
  z-index: 2;
}
.hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-white);
  transition: all var(--transition-fast);
}

/* ============================================
   HERO
   ============================================ */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(
      160deg,
      rgba(13,31,15,0.92) 0%,
      rgba(26,61,30,0.75) 40%,
      rgba(42,90,45,0.5) 70%,
      rgba(13,31,15,0.85) 100%
    );
  z-index: 1;
}

.hero-bg-image {
  position: absolute;
  inset: 0;
  background-image: url('images/hero-bg.jpg');
  background-size: cover;
  background-position: center 30%;
  z-index: 0;
}

/* Subtle noise texture overlay */
.hero-bg::after {
  content: '';
  position: absolute;
  inset: 0;
  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)' opacity='0.04'/%3E%3C/svg%3E");
  opacity: 0.3;
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: var(--space-xl) var(--space-md);
  padding-top: calc(var(--nav-height) + var(--space-lg));
}

.hero-label {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: var(--space-md);
  color: var(--color-gold);
  font-family: var(--font-label);
  font-size: 0.75rem;
  letter-spacing: 0.2em;
}

.hero-label::before {
  content: '';
  display: block;
  width: 32px;
  height: 1px;
  background: var(--color-gold);
}

.hero h1 {
  font-family: var(--font-display);
  font-weight: 700;
  color: var(--color-white);
  max-width: 820px;
  margin-bottom: var(--space-sm);
  font-size: clamp(3rem, 7vw, 6.5rem);
  line-height: 1.05;
}

.hero h1 em {
  font-style: italic;
  color: var(--color-mist);
}

.hero-subtitle {
  font-family: var(--font-ui);
  font-size: 1.15rem;
  color: rgba(255,255,255,0.75);
  max-width: 560px;
  margin-bottom: var(--space-md);
  font-weight: 300;
  line-height: 1.7;
}

.hero-actions {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  flex-wrap: wrap;
}

.hero-stats {
  position: absolute;
  bottom: var(--space-md);
  right: var(--space-md);
  z-index: 2;
  display: flex;
  gap: var(--space-md);
}

.hero-stat {
  text-align: right;
}

.hero-stat-number {
  font-family: var(--font-display);
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--color-gold);
  line-height: 1;
}

.hero-stat-label {
  font-family: var(--font-label);
  font-size: 0.65rem;
  letter-spacing: 0.15em;
  color: rgba(255,255,255,0.6);
  text-transform: uppercase;
  margin-top: 4px;
}

.hero-scroll {
  position: absolute;
  bottom: var(--space-md);
  left: var(--space-md);
  z-index: 2;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  color: rgba(255,255,255,0.5);
  font-family: var(--font-label);
  font-size: 0.65rem;
  letter-spacing: 0.15em;
  writing-mode: horizontal-tb;
}

.hero-scroll-line {
  width: 1px;
  height: 50px;
  background: linear-gradient(to bottom, rgba(255,255,255,0), rgba(255,255,255,0.4));
  animation: scrollPulse 2s ease-in-out infinite;
}

@keyframes scrollPulse {
  0%, 100% { opacity: 0.4; transform: scaleY(1); }
  50% { opacity: 1; transform: scaleY(1.2); }
}

/* Mountain silhouette */
.hero-mountain-silhouette {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 2;
  height: 180px;
  overflow: hidden;
}

/* ============================================
   INTRO BAND
   ============================================ */
.intro-band {
  background: var(--color-pine);
  padding: var(--space-sm) 0;
  overflow: hidden;
}

.intro-band-inner {
  display: flex;
  gap: var(--space-xl);
  animation: scrollBand 30s linear infinite;
  white-space: nowrap;
}

.intro-band-item {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-label);
  font-size: 0.7rem;
  letter-spacing: 0.15em;
  color: var(--color-mist);
  flex-shrink: 0;
}

.intro-band-item svg { flex-shrink: 0; }

@keyframes scrollBand {
  from { transform: translateX(0); }
  to { transform: translateX(-50%); }
}

/* ============================================
   ABOUT / MISSION SECTION
   ============================================ */
.mission-section {
  padding: var(--space-xl) 0;
  background: var(--color-cream);
  position: relative;
}

.mission-section::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--color-gold), var(--color-moss), var(--color-sky));
}

.mission-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-xl);
  align-items: center;
}

.mission-text .section-label {
  display: block;
  margin-bottom: var(--space-sm);
}

.mission-text h2 {
  color: var(--color-deep-forest);
  margin-bottom: var(--space-sm);
}

.mission-text p {
  color: var(--color-mid);
  margin-bottom: var(--space-sm);
  font-size: 1.05rem;
}

.mission-pillars {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-sm);
  margin-top: var(--space-md);
}

.pillar-item {
  padding: 1.25rem;
  border: 1px solid rgba(45,90,39,0.15);
  border-radius: 4px;
  position: relative;
  overflow: hidden;
  transition: all var(--transition-med);
}

.pillar-item::before {
  content: '';
  position: absolute;
  top: 0; left: 0;
  width: 3px; height: 100%;
  background: var(--color-gold);
  transform: scaleY(0);
  transform-origin: top;
  transition: transform var(--transition-med);
}

.pillar-item:hover::before { transform: scaleY(1); }
.pillar-item:hover { transform: translateY(-3px); box-shadow: 0 12px 32px rgba(13,31,15,0.1); }

.pillar-icon {
  font-size: 1.5rem;
  margin-bottom: 0.5rem;
}

.pillar-item h5 {
  font-family: var(--font-ui);
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--color-pine);
  margin-bottom: 0.25rem;
}

.pillar-item p {
  font-size: 0.85rem !important;
  color: var(--color-light) !important;
  margin: 0 !important;
  line-height: 1.5;
}

.mission-visual {
  position: relative;
}

.mission-image-main {
  border-radius: 4px;
  overflow: hidden;
  aspect-ratio: 4/5;
  background: var(--color-pine);
  position: relative;
}

.mission-image-main img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.image-placeholder {
  width: 100%;
  height: 100%;
  background: linear-gradient(160deg, var(--color-pine) 0%, var(--color-moss) 50%, var(--color-deep-forest) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 5rem;
}

.mission-image-accent {
  position: absolute;
  bottom: -var(--space-md);
  right: -var(--space-md);
  width: 60%;
  aspect-ratio: 4/3;
  border-radius: 4px;
  overflow: hidden;
  border: 4px solid var(--color-cream);
  box-shadow: 0 20px 60px rgba(13,31,15,0.25);
}

.elevation-badge {
  position: absolute;
  top: var(--space-sm);
  right: var(--space-sm);
  background: var(--color-gold);
  color: var(--color-deep-forest);
  padding: 0.75rem 1rem;
  border-radius: 4px;
  text-align: center;
}

.elevation-badge-number {
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 700;
  line-height: 1;
  display: block;
}

.elevation-badge-label {
  font-family: var(--font-label);
  font-size: 0.6rem;
  letter-spacing: 0.1em;
  display: block;
  margin-top: 3px;
}

/* ============================================
   RESEARCH AREAS
   ============================================ */
.research-section {
  padding: var(--space-xl) 0;
  background: var(--color-deep-forest);
  position: relative;
  overflow: hidden;
}

.research-section::before {
  content: '';
  position: absolute;
  top: -200px; right: -200px;
  width: 600px; height: 600px;
  background: radial-gradient(circle, rgba(45,90,39,0.3) 0%, transparent 70%);
  pointer-events: none;
}

.research-section::after {
  content: '';
  position: absolute;
  bottom: -200px; left: -200px;
  width: 500px; height: 500px;
  background: radial-gradient(circle, rgba(43,125,168,0.15) 0%, transparent 70%);
  pointer-events: none;
}

.section-header {
  margin-bottom: var(--space-lg);
}

.section-header .section-label {
  display: block;
  margin-bottom: 0.75rem;
  color: var(--color-gold);
}

.section-header h2 { color: var(--color-white); }
.section-header p {
  font-size: 1.1rem;
  color: rgba(255,255,255,0.6);
  max-width: 520px;
  margin-top: 0.75rem;
}

.research-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5px;
  position: relative;
  z-index: 1;
}

.research-card {
  background: rgba(255,255,255,0.04);
  padding: var(--space-md);
  border: 1px solid rgba(255,255,255,0.08);
  transition: all var(--transition-med);
  position: relative;
  overflow: hidden;
  cursor: pointer;
}

.research-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  background: linear-gradient(160deg, rgba(45,90,39,0.2), rgba(13,31,15,0.1));
  opacity: 0;
  transition: opacity var(--transition-med);
}

.research-card:hover { transform: translateY(-6px); }
.research-card:hover::before { opacity: 1; }

.research-card-number {
  font-family: var(--font-display);
  font-size: 4rem;
  font-weight: 700;
  color: rgba(255,255,255,0.06);
  line-height: 1;
  margin-bottom: var(--space-sm);
  transition: color var(--transition-med);
}

.research-card:hover .research-card-number { color: rgba(200,168,75,0.15); }

.research-card-icon {
  width: 52px; height: 52px;
  background: rgba(200,168,75,0.15);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  margin-bottom: var(--space-sm);
  font-size: 1.4rem;
  transition: background var(--transition-med);
}

.research-card:hover .research-card-icon { background: rgba(200,168,75,0.3); }

.research-card h3 {
  font-family: var(--font-heading);
  font-size: 1.3rem;
  color: var(--color-white);
  margin-bottom: 0.75rem;
}

.research-card p {
  font-size: 0.92rem;
  color: rgba(255,255,255,0.55);
  line-height: 1.7;
  margin-bottom: var(--space-sm);
}

.research-card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.tag {
  font-family: var(--font-label);
  font-size: 0.65rem;
  letter-spacing: 0.1em;
  padding: 0.3rem 0.6rem;
  border: 1px solid rgba(200,168,75,0.3);
  color: var(--color-gold);
  border-radius: 2px;
}

/* ============================================
   FEATURED SPECIES
   ============================================ */
.species-section {
  padding: var(--space-xl) 0;
  background: var(--color-snow);
  overflow: hidden;
}

.species-header {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  margin-bottom: var(--space-lg);
}

.species-scroll-container {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
  margin: 0 calc(-1 * var(--space-md));
  padding: 0 var(--space-md);
  padding-bottom: var(--space-sm);
}

.species-scroll-container::-webkit-scrollbar { display: none; }

.species-track {
  display: flex;
  gap: var(--space-sm);
  width: max-content;
}

.species-card {
  width: 280px;
  flex-shrink: 0;
  border-radius: 6px;
  overflow: hidden;
  background: var(--color-white);
  box-shadow: 0 4px 24px rgba(13,31,15,0.08);
  transition: all var(--transition-med);
}

.species-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 20px 48px rgba(13,31,15,0.15);
}

.species-card-image {
  aspect-ratio: 4/3;
  background: linear-gradient(135deg, var(--color-pine), var(--color-sky-deep));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 4rem;
  position: relative;
  overflow: hidden;
}

.species-card-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  position: absolute;
  inset: 0;
}

.species-card-elevation {
  position: absolute;
  top: 12px; right: 12px;
  background: rgba(13,31,15,0.85);
  color: var(--color-gold);
  font-family: var(--font-label);
  font-size: 0.65rem;
  letter-spacing: 0.1em;
  padding: 0.35rem 0.65rem;
  border-radius: 2px;
}

.species-card-body { padding: 1.25rem; }

.species-card-family {
  font-family: var(--font-label);
  font-size: 0.65rem;
  letter-spacing: 0.12em;
  color: var(--color-sage);
  text-transform: uppercase;
  margin-bottom: 0.4rem;
}

.species-card h4 {
  font-family: var(--font-heading);
  font-size: 1.15rem;
  color: var(--color-deep-forest);
  margin-bottom: 0.25rem;
}

.species-card-scientific {
  font-family: var(--font-body);
  font-style: italic;
  font-size: 0.82rem;
  color: var(--color-light);
  margin-bottom: 0.75rem;
}

.species-card-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.status-badge {
  font-family: var(--font-label);
  font-size: 0.6rem;
  letter-spacing: 0.08em;
  padding: 0.3rem 0.6rem;
  border-radius: 2px;
}

.status-lc { background: rgba(90,158,78,0.15); color: var(--color-sage); }
.status-nt { background: rgba(200,168,75,0.15); color: var(--color-gold); }
.status-vu { background: rgba(200,120,75,0.15); color: #c8784b; }
.status-en { background: rgba(200,75,75,0.15); color: #c84b4b; }

.species-nav {
  display: flex;
  gap: 0.5rem;
}

/* ============================================
   PUBLICATIONS / RESEARCH
   ============================================ */
.publications-section {
  padding: var(--space-xl) 0;
  background: var(--color-cream);
}

.publications-layout {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: var(--space-lg);
  align-items: start;
}

.publications-sidebar {
  position: sticky;
  top: calc(var(--nav-height) + var(--space-md));
}

.publications-sidebar h2 { margin-bottom: var(--space-sm); }

.pub-filter {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  margin-top: var(--space-sm);
}

.pub-filter-btn {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.65rem 1rem;
  border: 1px solid transparent;
  border-radius: 3px;
  font-family: var(--font-ui);
  font-size: 0.88rem;
  color: var(--color-mid);
  transition: all var(--transition-fast);
  text-align: left;
  cursor: pointer;
  background: none;
}

.pub-filter-btn:hover, .pub-filter-btn.active {
  background: var(--color-pine);
  color: var(--color-white);
  border-color: var(--color-pine);
}

.pub-count {
  font-family: var(--font-label);
  font-size: 0.65rem;
  letter-spacing: 0.08em;
  background: rgba(200,168,75,0.2);
  color: var(--color-gold);
  padding: 0.2rem 0.5rem;
  border-radius: 2px;
}

.pub-filter-btn.active .pub-count {
  background: rgba(255,255,255,0.2);
  color: var(--color-white);
}

.publications-list {
  display: flex;
  flex-direction: column;
  gap: 1.5px;
}

.pub-item {
  background: var(--color-white);
  border: 1px solid rgba(45,90,39,0.1);
  padding: var(--space-md);
  transition: all var(--transition-med);
  position: relative;
  overflow: hidden;
}

.pub-item::before {
  content: '';
  position: absolute;
  left: 0; top: 0; bottom: 0;
  width: 3px;
  background: var(--color-gold);
  transform: scaleY(0);
  transform-origin: bottom;
  transition: transform var(--transition-med);
}

.pub-item:hover { box-shadow: 0 8px 32px rgba(13,31,15,0.08); }
.pub-item:hover::before { transform: scaleY(1); }

.pub-meta {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  margin-bottom: 0.6rem;
  flex-wrap: wrap;
}

.pub-type {
  font-family: var(--font-label);
  font-size: 0.62rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 0.25rem 0.6rem;
  background: rgba(45,90,39,0.1);
  color: var(--color-moss);
  border-radius: 2px;
}

.pub-year {
  font-family: var(--font-label);
  font-size: 0.72rem;
  color: var(--color-light);
}

.pub-journal {
  font-family: var(--font-body);
  font-style: italic;
  font-size: 0.82rem;
  color: var(--color-sky-deep);
}

.pub-item h4 {
  font-family: var(--font-heading);
  font-size: 1.05rem;
  color: var(--color-deep-forest);
  margin-bottom: 0.5rem;
  line-height: 1.3;
  transition: color var(--transition-fast);
}

.pub-item:hover h4 { color: var(--color-pine); }

.pub-authors {
  font-size: 0.87rem;
  color: var(--color-light);
  margin-bottom: 0.75rem;
  font-style: italic;
}

.pub-abstract {
  font-size: 0.88rem;
  color: var(--color-mid);
  line-height: 1.65;
  margin-bottom: 0.75rem;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.pub-actions {
  display: flex;
  gap: var(--space-sm);
  align-items: center;
}

.pub-doi {
  font-family: var(--font-label);
  font-size: 0.62rem;
  letter-spacing: 0.08em;
  color: var(--color-light);
  margin-left: auto;
}

/* ============================================
   FIELD EXPEDITIONS
   ============================================ */
.expeditions-section {
  padding: var(--space-xl) 0;
  background: var(--color-pine);
  position: relative;
  overflow: hidden;
}

.expeditions-bg-pattern {
  position: absolute;
  inset: 0;
  opacity: 0.04;
  background-image: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='1'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
}

.expeditions-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-md);
  position: relative;
  z-index: 1;
}

.expedition-featured {
  grid-row: span 2;
  background: rgba(0,0,0,0.3);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: 4px;
  overflow: hidden;
  position: relative;
  min-height: 500px;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: var(--space-md);
}

.expedition-card {
  background: rgba(0,0,0,0.3);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: 4px;
  overflow: hidden;
  padding: var(--space-md);
  display: flex;
  flex-direction: column;
  transition: all var(--transition-med);
}

.expedition-card:hover {
  border-color: rgba(200,168,75,0.4);
  background: rgba(0,0,0,0.4);
}

.expedition-status {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-family: var(--font-label);
  font-size: 0.65rem;
  letter-spacing: 0.12em;
  margin-bottom: var(--space-sm);
}

.status-dot {
  width: 7px; height: 7px;
  border-radius: 50%;
  flex-shrink: 0;
}

.status-active .status-dot { background: #5adb5a; box-shadow: 0 0 6px #5adb5a; }
.status-active { color: #5adb5a; }
.status-upcoming .status-dot { background: var(--color-gold); }
.status-upcoming { color: var(--color-gold); }
.status-completed .status-dot { background: rgba(255,255,255,0.4); }
.status-completed { color: rgba(255,255,255,0.4); }

.expedition-featured h3, .expedition-card h3 {
  font-family: var(--font-heading);
  font-size: 1.4rem;
  color: var(--color-white);
  margin-bottom: 0.5rem;
}

.expedition-card h3 { font-size: 1.15rem; }

.expedition-location {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-family: var(--font-label);
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  color: var(--color-mist);
  margin-bottom: 0.75rem;
}

.expedition-desc {
  font-size: 0.9rem;
  color: rgba(255,255,255,0.6);
  line-height: 1.65;
  margin-bottom: var(--space-sm);
}

.expedition-stats {
  display: flex;
  gap: var(--space-sm);
  padding-top: var(--space-sm);
  border-top: 1px solid rgba(255,255,255,0.1);
  margin-top: auto;
}

.exp-stat {
  text-align: center;
}

.exp-stat-value {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-gold);
  line-height: 1;
  display: block;
}

.exp-stat-label {
  font-family: var(--font-label);
  font-size: 0.6rem;
  letter-spacing: 0.08em;
  color: rgba(255,255,255,0.4);
  display: block;
  margin-top: 3px;
}

/* ============================================
   TEAM SECTION
   ============================================ */
.team-section {
  padding: var(--space-xl) 0;
  background: var(--color-cream);
}

.team-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-md);
  margin-top: var(--space-lg);
}

.team-card {
  position: relative;
  transition: transform var(--transition-med);
}

.team-card:hover { transform: translateY(-6px); }

.team-card-image {
  aspect-ratio: 3/4;
  background: linear-gradient(160deg, var(--color-pine), var(--color-deep-forest));
  border-radius: 4px;
  overflow: hidden;
  position: relative;
  margin-bottom: 1rem;
  display: flex;
  align-items: flex-end;
  justify-content: center;
  font-size: 5rem;
}

.team-card-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  position: absolute;
  inset: 0;
}

.team-card-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(13,31,15,0.9) 0%, transparent 60%);
  opacity: 0;
  transition: opacity var(--transition-med);
  display: flex;
  align-items: flex-end;
  padding: var(--space-sm);
  flex-direction: column;
  justify-content: flex-end;
}

.team-card:hover .team-card-overlay { opacity: 1; }

.team-card-links { display: flex; gap: 0.5rem; }

.team-link {
  width: 36px; height: 36px;
  background: rgba(255,255,255,0.15);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  color: var(--color-white);
  font-size: 0.75rem;
  transition: background var(--transition-fast);
}

.team-link:hover { background: var(--color-gold); color: var(--color-deep-forest); }

.team-card h4 {
  font-family: var(--font-heading);
  font-size: 1.05rem;
  color: var(--color-deep-forest);
  margin-bottom: 0.25rem;
}

.team-card-role {
  font-family: var(--font-label);
  font-size: 0.68rem;
  letter-spacing: 0.1em;
  color: var(--color-sage);
  text-transform: uppercase;
  margin-bottom: 0.5rem;
}

.team-card-specialty {
  font-size: 0.82rem;
  color: var(--color-light);
  line-height: 1.5;
}

/* ============================================
   CITIZEN SCIENCE / CTA
   ============================================ */
.cta-section {
  padding: var(--space-xl) 0;
  background: var(--color-deep-forest);
  position: relative;
  overflow: hidden;
  text-align: center;
}

.cta-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 50% 50%, rgba(45,90,39,0.4) 0%, transparent 70%);
  pointer-events: none;
}

.cta-content {
  position: relative;
  z-index: 1;
  max-width: 680px;
  margin: 0 auto;
}

.cta-content .section-label {
  margin-bottom: var(--space-sm);
  color: var(--color-gold);
}

.cta-content h2 { color: var(--color-white); margin-bottom: 1rem; }

.cta-content p {
  color: rgba(255,255,255,0.65);
  font-size: 1.1rem;
  margin-bottom: var(--space-md);
}

.cta-actions { display: flex; gap: var(--space-sm); justify-content: center; flex-wrap: wrap; }

/* ============================================
   CONTACT SECTION
   ============================================ */
.contact-section {
  padding: var(--space-xl) 0;
  background: var(--color-snow);
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.5fr;
  gap: var(--space-xl);
  align-items: start;
}

.contact-info h2 { color: var(--color-deep-forest); margin-bottom: 1rem; }
.contact-info > p { color: var(--color-mid); margin-bottom: var(--space-md); }

.contact-details { display: flex; flex-direction: column; gap: var(--space-sm); }

.contact-detail {
  display: flex;
  align-items: flex-start;
  gap: var(--space-sm);
}

.contact-detail-icon {
  width: 44px; height: 44px;
  background: rgba(45,90,39,0.1);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.1rem;
  flex-shrink: 0;
}

.contact-detail-text h5 {
  font-family: var(--font-ui);
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--color-mid);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 0.2rem;
}

.contact-detail-text p {
  font-size: 0.95rem;
  color: var(--color-charcoal);
}

.contact-form {
  background: var(--color-white);
  padding: var(--space-md);
  border-radius: 4px;
  box-shadow: 0 8px 48px rgba(13,31,15,0.1);
}

.contact-form h3 {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  color: var(--color-deep-forest);
  margin-bottom: var(--space-md);
}

.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }

.form-group { display: flex; flex-direction: column; gap: 0.5rem; }
.form-group.full { grid-column: span 2; }

.form-group label {
  font-family: var(--font-label);
  font-size: 0.68rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-mid);
}

.form-group input,
.form-group textarea,
.form-group select {
  padding: 0.85rem 1rem;
  border: 1.5px solid rgba(45,90,39,0.2);
  border-radius: 3px;
  font-family: var(--font-body);
  font-size: 0.95rem;
  color: var(--color-charcoal);
  background: var(--color-snow);
  transition: border-color var(--transition-fast);
  outline: none;
  width: 100%;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  border-color: var(--color-moss);
  background: var(--color-white);
}

.form-group textarea { resize: vertical; min-height: 120px; }

.form-submit { margin-top: 0.5rem; width: 100%; }

/* ============================================
   FOOTER
   ============================================ */
.site-footer {
  background: var(--color-deep-forest);
  padding: var(--space-xl) 0 0;
  border-top: 3px solid var(--color-gold);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: var(--space-lg);
  padding-bottom: var(--space-lg);
  border-bottom: 1px solid rgba(255,255,255,0.08);
}

.footer-brand .site-logo {
  margin-bottom: var(--space-sm);
}

.footer-brand p {
  font-size: 0.9rem;
  color: rgba(255,255,255,0.5);
  line-height: 1.7;
  margin-bottom: var(--space-sm);
}

.social-links { display: flex; gap: 0.5rem; }

.social-link {
  width: 38px; height: 38px;
  border: 1px solid rgba(255,255,255,0.15);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  color: rgba(255,255,255,0.5);
  font-size: 0.85rem;
  transition: all var(--transition-fast);
}

.social-link:hover {
  background: var(--color-gold);
  border-color: var(--color-gold);
  color: var(--color-deep-forest);
}

.footer-col h5 {
  font-family: var(--font-label);
  font-size: 0.7rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-gold);
  margin-bottom: var(--space-sm);
}

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

.footer-nav a {
  font-size: 0.9rem;
  color: rgba(255,255,255,0.5);
  transition: color var(--transition-fast);
  display: flex; align-items: center; gap: 0.4rem;
}

.footer-nav a::before {
  content: '—';
  font-size: 0.7rem;
  color: rgba(200,168,75,0.4);
}

.footer-nav a:hover { color: var(--color-white); }

.footer-newsletter p {
  font-size: 0.88rem;
  color: rgba(255,255,255,0.5);
  margin-bottom: 0.75rem;
}

.newsletter-form {
  display: flex;
  gap: 0;
}

.newsletter-form input {
  flex: 1;
  padding: 0.75rem 1rem;
  background: rgba(255,255,255,0.07);
  border: 1px solid rgba(255,255,255,0.12);
  border-right: none;
  border-radius: 3px 0 0 3px;
  color: var(--color-white);
  font-family: var(--font-body);
  font-size: 0.88rem;
  outline: none;
}

.newsletter-form input::placeholder { color: rgba(255,255,255,0.3); }
.newsletter-form input:focus { border-color: rgba(200,168,75,0.4); }

.newsletter-form button {
  padding: 0.75rem 1.25rem;
  background: var(--color-gold);
  color: var(--color-deep-forest);
  border: none;
  border-radius: 0 3px 3px 0;
  font-family: var(--font-label);
  font-size: 0.68rem;
  letter-spacing: 0.1em;
  cursor: pointer;
  transition: background var(--transition-fast);
  font-weight: 700;
}

.newsletter-form button:hover { background: var(--color-gold-light); }

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-sm) 0;
}

.footer-bottom p {
  font-family: var(--font-label);
  font-size: 0.65rem;
  letter-spacing: 0.08em;
  color: rgba(255,255,255,0.3);
}

.footer-bottom-links {
  display: flex;
  gap: var(--space-sm);
}

.footer-bottom-links a {
  font-family: var(--font-label);
  font-size: 0.65rem;
  letter-spacing: 0.08em;
  color: rgba(255,255,255,0.3);
  transition: color var(--transition-fast);
}

.footer-bottom-links a:hover { color: var(--color-gold); }

/* ============================================
   SCROLL ANIMATIONS
   ============================================ */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }
.reveal-delay-4 { transition-delay: 0.4s; }

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 1024px) {
  .mission-grid { grid-template-columns: 1fr; gap: var(--space-md); }
  .research-grid { grid-template-columns: 1fr 1fr; }
  .team-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: var(--space-md); }
  .publications-layout { grid-template-columns: 1fr; }
  .publications-sidebar { position: static; }
}

@media (max-width: 768px) {
  :root { --space-xl: 4rem; --space-lg: 2.5rem; }

  .main-nav { display: none; }
  .hamburger { display: flex; }

  .main-nav.open {
    display: flex;
    flex-direction: column;
    position: fixed;
    inset: 0;
    background: var(--color-deep-forest);
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    z-index: 999;
  }

  .main-nav.open a {
    font-size: 1.5rem;
    font-family: var(--font-heading);
  }

  .research-grid { grid-template-columns: 1fr; }
  .expeditions-grid { grid-template-columns: 1fr; }
  .expedition-featured { grid-row: auto; min-height: 350px; }
  .team-grid { grid-template-columns: repeat(2, 1fr); }
  .contact-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .hero-stats { display: none; }
  .hero h1 { font-size: clamp(2.2rem, 8vw, 3.5rem); }
  .species-header { flex-direction: column; align-items: flex-start; gap: 1rem; }
  .mission-pillars { grid-template-columns: 1fr; }
  .form-grid { grid-template-columns: 1fr; }
  .form-group.full { grid-column: span 1; }
  .footer-bottom { flex-direction: column; gap: 0.75rem; text-align: center; }
}

@media (max-width: 480px) {
  .team-grid { grid-template-columns: 1fr; }
  .hero-actions { flex-direction: column; align-items: flex-start; }
  .cta-actions { flex-direction: column; align-items: center; }
}

/* ============================================
   PAGE TEMPLATES
   ============================================ */

/* About Page */
.page-hero {
  padding: calc(var(--nav-height) + var(--space-xl)) 0 var(--space-lg);
  background: var(--color-deep-forest);
  position: relative;
  overflow: hidden;
}

.page-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 30% 50%, rgba(45,90,39,0.35) 0%, transparent 60%);
}

.page-hero-content { position: relative; z-index: 1; }
.page-hero .section-label { color: var(--color-gold); display: block; margin-bottom: 0.75rem; }
.page-hero h1 { color: var(--color-white); margin-bottom: 1rem; }
.page-hero p { color: rgba(255,255,255,0.65); font-size: 1.1rem; max-width: 640px; }

/* Bird Guide Page */
.birds-filter-bar {
  background: var(--color-white);
  border-bottom: 1px solid rgba(45,90,39,0.1);
  padding: 1rem 0;
  position: sticky;
  top: var(--nav-height);
  z-index: 100;
}

.birds-filter-inner {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
  align-items: center;
}

.birds-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--space-md);
  padding: var(--space-md) 0;
}

/* Map embed */
.map-embed {
  width: 100%;
  height: 400px;
  border-radius: 4px;
  overflow: hidden;
  border: 1px solid rgba(45,90,39,0.15);
}