/* ==========================================================================
   SAND HORDE: SURVIVOR — OFFICIAL WEBSITE MASTER STYLESHEET
   Aesthetics: Wasteland Apocalyptic Sci-Fi, Cyber-Amber & Obsidian Dark
   ========================================================================== */

:root {
  --bg-primary: #080b12;
  --bg-secondary: #0f172a;
  --bg-card: rgba(15, 23, 42, 0.75);
  --bg-card-hover: rgba(30, 41, 59, 0.85);
  --border-color: rgba(217, 119, 6, 0.25);
  --border-glow: rgba(245, 158, 11, 0.55);
  
  --amber-primary: #f59e0b;
  --amber-dark: #d97706;
  --amber-glow: rgba(245, 158, 11, 0.3);
  
  --cyan-accent: #06b6d4;
  --emerald-accent: #10b981;
  --crimson-accent: #ef4444;
  
  --text-main: #f1f5f9;
  --text-muted: #94a3b8;
  --text-dim: #64748b;
  
  --font-display: 'Rajdhani', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', 'Courier New', monospace;
  
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

/* Base Reset */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
  background-color: var(--bg-primary);
  color: var(--text-main);
  font-family: var(--font-body);
}

body {
  overflow-x: hidden;
  line-height: 1.6;
  background-image: 
    radial-gradient(circle at 50% 0%, rgba(217, 119, 6, 0.12) 0%, transparent 60%),
    radial-gradient(circle at 100% 50%, rgba(6, 182, 212, 0.05) 0%, transparent 40%),
    linear-gradient(to bottom, #080b12 0%, #0d131f 100%);
  background-attachment: fixed;
}

a {
  color: inherit;
  text-decoration: none;
}

img, video {
  max-width: 100%;
  display: block;
}

/* Custom Scrollbar */
::-webkit-scrollbar {
  width: 9px;
}
::-webkit-scrollbar-track {
  background: #080b12;
}
::-webkit-scrollbar-thumb {
  background: var(--amber-dark);
  border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
  background: var(--amber-primary);
}

/* Container */
.container {
  width: 100%;
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: #ffffff;
}

.section-tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--amber-primary);
  background: rgba(245, 158, 11, 0.1);
  border: 1px solid rgba(245, 158, 11, 0.3);
  padding: 0.3rem 0.8rem;
  border-radius: 4px;
  margin-bottom: 0.8rem;
  letter-spacing: 0.12em;
}

.section-title {
  font-size: 2.5rem;
  line-height: 1.15;
  margin-bottom: 1rem;
  background: linear-gradient(135deg, #ffffff 30%, #cbd5e1 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.section-desc {
  color: var(--text-muted);
  font-size: 1.05rem;
  max-width: 720px;
  margin-bottom: 2.5rem;
}

/* Navigation Bar */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 1rem 0;
  background: rgba(8, 11, 18, 0.88);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(217, 119, 6, 0.2);
  transition: var(--transition);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.nav-logo img {
  height: 42px;
  width: auto;
  filter: drop-shadow(0 0 8px rgba(245, 158, 11, 0.4));
}

.nav-logo-text {
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  color: #fff;
}

.nav-logo-text span {
  color: var(--amber-primary);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 1.8rem;
  list-style: none;
}

.nav-link {
  font-size: 0.92rem;
  font-weight: 600;
  letter-spacing: 0.03em;
  color: var(--text-muted);
  transition: var(--transition);
  position: relative;
}

.nav-link:hover, .nav-link.active {
  color: var(--amber-primary);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0%;
  height: 2px;
  background: var(--amber-primary);
  transition: width 0.25s ease;
}

.nav-link:hover::after, .nav-link.active::after {
  width: 100%;
}

.nav-btn {
  background: linear-gradient(135deg, var(--amber-primary), var(--amber-dark));
  color: #0b0f19;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 0.95rem;
  letter-spacing: 0.08em;
  padding: 0.55rem 1.3rem;
  border-radius: var(--radius-sm);
  border: none;
  cursor: pointer;
  box-shadow: 0 0 15px var(--amber-glow);
  transition: var(--transition);
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}

.nav-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 25px rgba(245, 158, 11, 0.6);
  color: #000;
}

.mobile-menu-btn {
  display: none;
  background: transparent;
  border: 1px solid var(--border-color);
  color: var(--amber-primary);
  font-size: 1.5rem;
  padding: 0.4rem 0.7rem;
  border-radius: var(--radius-sm);
  cursor: pointer;
}

/* Hero Section */
.hero-section {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 8rem 0 5rem;
  overflow: hidden;
}

.hero-backdrop {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image: url('../images/library_hero.png');
  background-size: cover;
  background-position: center 25%;
  filter: brightness(0.42) saturate(1.2);
  z-index: 1;
}

.hero-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: 
    radial-gradient(ellipse at center, rgba(8, 11, 18, 0.4) 0%, rgba(8, 11, 18, 0.95) 80%),
    linear-gradient(to bottom, rgba(8, 11, 18, 0.6) 0%, var(--bg-primary) 100%);
  z-index: 2;
}

.particles-canvas {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 3;
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 4;
  text-align: center;
  max-width: 960px;
  margin: 0 auto;
}

.hero-logo-img {
  max-width: 580px;
  width: 90%;
  margin: 0 auto 1.5rem;
  filter: drop-shadow(0 0 30px rgba(245, 158, 11, 0.5));
  animation: floatLogo 6s ease-in-out infinite alternate;
}

@keyframes floatLogo {
  0% { transform: translateY(0px); }
  100% { transform: translateY(-8px); }
}

.hero-subtitle {
  font-family: var(--font-display);
  font-size: 1.45rem;
  font-weight: 600;
  color: #e2e8f0;
  letter-spacing: 0.08em;
  margin-bottom: 1.5rem;
  text-shadow: 0 2px 8px rgba(0,0,0,0.8);
}

.hero-badges {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.6rem;
  margin-bottom: 2.5rem;
}

.badge {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  padding: 0.35rem 0.85rem;
  border-radius: 4px;
  font-weight: 600;
  letter-spacing: 0.05em;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}

.badge-amber {
  background: rgba(245, 158, 11, 0.15);
  border: 1px solid rgba(245, 158, 11, 0.4);
  color: #fbbf24;
}

.badge-cyan {
  background: rgba(6, 182, 212, 0.15);
  border: 1px solid rgba(6, 182, 212, 0.4);
  color: #38bdf8;
}

.badge-emerald {
  background: rgba(16, 185, 129, 0.15);
  border: 1px solid rgba(16, 185, 129, 0.4);
  color: #34d399;
}

.hero-cta {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 1.2rem;
}

.btn-primary {
  background: linear-gradient(135deg, var(--amber-primary), #d97706);
  color: #0b0f19;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.1rem;
  letter-spacing: 0.08em;
  padding: 0.9rem 2rem;
  border-radius: var(--radius-sm);
  border: none;
  cursor: pointer;
  box-shadow: 0 0 25px rgba(245, 158, 11, 0.4);
  transition: var(--transition);
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
}

.btn-primary:hover {
  transform: translateY(-3px) scale(1.02);
  box-shadow: 0 0 35px rgba(245, 158, 11, 0.7);
  color: #000;
}

.btn-secondary {
  background: rgba(15, 23, 42, 0.8);
  color: #ffffff;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.1rem;
  letter-spacing: 0.08em;
  padding: 0.9rem 2rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-color);
  cursor: pointer;
  backdrop-filter: blur(8px);
  transition: var(--transition);
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
}

.btn-secondary:hover {
  background: rgba(30, 41, 59, 0.9);
  border-color: var(--amber-primary);
  color: var(--amber-primary);
  transform: translateY(-3px);
  box-shadow: 0 0 20px rgba(245, 158, 11, 0.2);
}

/* Section Common Styling */
.section-padding {
  padding: 6.5rem 0;
  position: relative;
}

/* Features Grid */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
  gap: 1.8rem;
}

.feature-card {
  background: var(--bg-card);
  backdrop-filter: blur(10px);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 2.2rem 1.8rem;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, transparent, var(--amber-primary), transparent);
  opacity: 0;
  transition: var(--transition);
}

.feature-card:hover {
  transform: translateY(-6px);
  background: var(--bg-card-hover);
  border-color: var(--amber-primary);
  box-shadow: 0 15px 35px rgba(0,0,0,0.6), 0 0 20px var(--amber-glow);
}

.feature-card:hover::before {
  opacity: 1;
}

.feature-icon-box {
  width: 54px;
  height: 54px;
  border-radius: var(--radius-sm);
  background: rgba(245, 158, 11, 0.12);
  border: 1px solid rgba(245, 158, 11, 0.3);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
  margin-bottom: 1.4rem;
  color: var(--amber-primary);
  transition: var(--transition);
}

.feature-card:hover .feature-icon-box {
  background: var(--amber-primary);
  color: #0b0f19;
  box-shadow: 0 0 15px var(--amber-glow);
}

.feature-title {
  font-size: 1.35rem;
  margin-bottom: 0.75rem;
  color: #ffffff;
}

.feature-text {
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.6;
}

/* Vehicles & Arsenal Section */
.vehicle-tabs {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 0.8rem;
  margin-bottom: 2.5rem;
}

.tab-btn {
  background: rgba(15, 23, 42, 0.7);
  border: 1px solid var(--border-color);
  color: var(--text-muted);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.05rem;
  letter-spacing: 0.05em;
  padding: 0.65rem 1.6rem;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: var(--transition);
}

.tab-btn:hover {
  color: var(--amber-primary);
  border-color: var(--amber-primary);
}

.tab-btn.active {
  background: linear-gradient(135deg, var(--amber-primary), var(--amber-dark));
  color: #0b0f19;
  border-color: transparent;
  box-shadow: 0 0 15px var(--amber-glow);
}

.tab-content {
  display: none;
}

.tab-content.active {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2.5rem;
  align-items: center;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 2.5rem;
  backdrop-filter: blur(12px);
  animation: fadeIn 0.4s ease;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

.tab-img-box {
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--border-color);
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.6);
}

.tab-info h3 {
  font-size: 1.85rem;
  color: #ffffff;
  margin-bottom: 0.5rem;
}

.tab-tagline {
  font-family: var(--font-mono);
  color: var(--amber-primary);
  font-size: 0.85rem;
  margin-bottom: 1.2rem;
}

.tab-specs-list {
  list-style: none;
  margin: 1.4rem 0;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.tab-spec-item {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  color: var(--text-muted);
  font-size: 0.95rem;
}

.tab-spec-bullet {
  color: var(--amber-primary);
  font-weight: bold;
}

/* Gallery Section */
.gallery-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.4rem;
}

.gallery-item {
  position: relative;
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--border-color);
  aspect-ratio: 16 / 9;
  cursor: pointer;
  background: #0f172a;
  transition: var(--transition);
}

.gallery-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}

.gallery-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(to top, rgba(8, 11, 18, 0.95) 0%, rgba(8, 11, 18, 0.2) 60%, transparent 100%);
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: 1.2rem;
  opacity: 0;
  transition: var(--transition);
}

.gallery-item:hover {
  transform: translateY(-4px);
  border-color: var(--amber-primary);
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.7), 0 0 15px var(--amber-glow);
}

.gallery-item:hover img {
  transform: scale(1.07);
}

.gallery-item:hover .gallery-overlay {
  opacity: 1;
}

.gallery-caption {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 700;
  color: #ffffff;
}

.gallery-sub {
  font-size: 0.8rem;
  color: var(--amber-primary);
  font-family: var(--font-mono);
}

/* Lightbox Modal */
.lightbox-modal {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(4, 7, 13, 0.96);
  backdrop-filter: blur(16px);
  z-index: 2000;
  align-items: center;
  justify-content: center;
  padding: 2rem;
}

.lightbox-content {
  position: relative;
  max-width: 1100px;
  width: 100%;
  text-align: center;
}

.lightbox-img {
  max-height: 80vh;
  margin: 0 auto;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-glow);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.9);
}

.lightbox-caption {
  margin-top: 1rem;
  font-family: var(--font-display);
  font-size: 1.3rem;
  color: #ffffff;
}

.lightbox-close {
  position: absolute;
  top: -45px;
  right: 0;
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-size: 2.2rem;
  cursor: pointer;
  transition: var(--transition);
}

.lightbox-close:hover {
  color: var(--amber-primary);
}

.lightbox-nav {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  background: rgba(15, 23, 42, 0.8);
  border: 1px solid var(--border-color);
  color: #ffffff;
  font-size: 1.8rem;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: var(--transition);
}

.lightbox-nav:hover {
  background: var(--amber-primary);
  color: #0b0f19;
}

.lightbox-prev { left: -65px; }
.lightbox-next { right: -65px; }

/* Manual Teaser Banner */
.manual-banner-card {
  background: linear-gradient(135deg, rgba(30, 41, 59, 0.8), rgba(15, 23, 42, 0.95));
  border: 1px solid var(--border-glow);
  border-radius: var(--radius-lg);
  padding: 3.5rem;
  position: relative;
  overflow: hidden;
  box-shadow: 0 20px 45px rgba(0, 0, 0, 0.7);
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  align-items: center;
  gap: 2.5rem;
}

.manual-banner-card::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(245, 158, 11, 0.15) 0%, transparent 70%);
  pointer-events: none;
}

.manual-banner-features {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin: 1.8rem 0;
}

.banner-feat-item {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 0.95rem;
  color: #e2e8f0;
}

.banner-feat-icon {
  color: var(--amber-primary);
}

.manual-preview-mockup {
  position: relative;
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--border-color);
  box-shadow: 0 15px 35px rgba(0, 0, 0, 0.8);
  transform: perspective(800px) rotateY(-8deg) rotateX(4deg);
  transition: var(--transition);
}

.manual-preview-mockup:hover {
  transform: perspective(800px) rotateY(0deg) rotateX(0deg);
}

/* Studio & Requirements Section */
.studio-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 2.8rem;
  display: flex;
  align-items: center;
  gap: 2.5rem;
  margin-bottom: 3.5rem;
}

.studio-logo-box img {
  max-width: 200px;
  border-radius: var(--radius-sm);
  filter: drop-shadow(0 0 15px rgba(0, 0, 0, 0.8));
}

.reqs-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
}

.req-box {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 2rem;
}

.req-box h4 {
  font-size: 1.25rem;
  margin-bottom: 1.2rem;
  color: var(--amber-primary);
  border-bottom: 1px solid rgba(217, 119, 6, 0.2);
  padding-bottom: 0.6rem;
}

.req-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
}

.req-list li {
  font-size: 0.92rem;
  color: var(--text-muted);
  display: flex;
}

.req-label {
  font-weight: 600;
  color: #ffffff;
  min-width: 110px;
}

/* Footer */
.footer {
  background: #04070d;
  border-top: 1px solid rgba(217, 119, 6, 0.25);
  padding: 4.5rem 0 2rem;
  color: var(--text-dim);
  font-size: 0.9rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: 2.5rem;
  margin-bottom: 3.5rem;
}

.footer-brand p {
  margin: 1rem 0;
  color: var(--text-muted);
  max-width: 320px;
}

.footer-col h5 {
  font-size: 1.05rem;
  color: #ffffff;
  margin-bottom: 1.2rem;
  position: relative;
  display: inline-block;
}

.footer-col h5::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 25px;
  height: 2px;
  background: var(--amber-primary);
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.footer-links a {
  color: var(--text-muted);
  transition: var(--transition);
}

.footer-links a:hover {
  color: var(--amber-primary);
  padding-left: 4px;
}

.footer-bottom {
  text-align: center;
  padding-top: 2rem;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  font-size: 0.85rem;
}

/* Responsive Media Queries */
@media (max-width: 1024px) {
  .section-title { font-size: 2.1rem; }
  .tab-content.active { grid-template-columns: 1fr; }
  .manual-banner-card { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .lightbox-prev { left: 10px; }
  .lightbox-next { right: 10px; }
}

@media (max-width: 768px) {
  .nav-links { display: none; }
  .mobile-menu-btn { display: block; }
  .hero-subtitle { font-size: 1.15rem; }
  .hero-logo-img { max-width: 360px; }
  .features-grid { grid-template-columns: 1fr; }
  .reqs-grid { grid-template-columns: 1fr; }
  .studio-card { flex-direction: column; text-align: center; }
  .manual-banner-features { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
}