/* SquadForge Promo Website - Tech/Gaming Dark Theme */
/* Design: Dark navy base, electric cyan accents, lime green CTAs */

:root {
  --bg-primary: #0d1117;
  --bg-secondary: #161b22;
  --bg-tertiary: #1c2333;
  --bg-card: #21262d;
  --border-color: #30363d;
  --text-primary: #e6edf3;
  --text-secondary: #8b949e;
  --text-muted: #656d76;
  --accent-cyan: #58a6ff;
  --accent-green: #b5e853;
  --accent-lime: #a3d944;
  --accent-glow: rgba(88, 166, 255, 0.15);
  --gradient-hero: linear-gradient(135deg, #0d1117 0%, #161b22 50%, #0d2137 100%);
  --gradient-card: linear-gradient(145deg, #21262d, #1c2333);
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 0 20px rgba(88, 166, 255, 0.15);
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --font-primary: -apple-system, BlinkMacSystemFont, 'Segoe UI', Helvetica, Arial, sans-serif;
  --font-mono: 'SFMono-Regular', Consolas, 'Liberation Mono', Menlo, monospace;
  --spacing-xs: 8px;
  --spacing-sm: 16px;
  --spacing-md: 24px;
  --spacing-lg: 40px;
  --spacing-xl: 64px;
  --spacing-2xl: 96px;
  --max-width: 1200px;
  --transition: 0.3s ease;
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-primary);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  overflow-x: hidden;
}

a {
  color: var(--accent-cyan);
  text-decoration: none;
  transition: color var(--transition);
}

a:hover {
  color: #79c0ff;
  text-decoration: underline;
}

img {
  max-width: 100%;
  height: auto;
}

/* Typography */
h1, h2, h3, h4 {
  color: var(--text-primary);
  font-weight: 600;
  line-height: 1.3;
}

h1 { font-size: 2.5rem; margin-bottom: var(--spacing-md); }
h2 { font-size: 1.75rem; margin-bottom: var(--spacing-sm); }
h3 { font-size: 1.25rem; margin-bottom: var(--spacing-xs); }

p {
  color: var(--text-secondary);
  margin-bottom: var(--spacing-sm);
}

/* Container */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

/* Navigation */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(13, 17, 23, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
  padding: 0 var(--spacing-md);
}

.nav-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 60px;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text-primary);
  text-decoration: none;
  white-space: nowrap;
  flex-shrink: 0;
}

.nav-brand:hover {
  color: var(--accent-cyan);
  text-decoration: none;
}

.nav-brand svg {
  flex-shrink: 0;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  list-style: none;
}

.nav-links a {
  color: var(--text-secondary);
  font-size: 0.9rem;
  font-weight: 500;
  padding: 6px 0;
  transition: color var(--transition);
  white-space: nowrap;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--text-primary);
  text-decoration: none;
}

.nav-hamburger {
  display: none;
  background: none;
  border: none;
  color: var(--text-primary);
  cursor: pointer;
  padding: 8px;
}

/* Hero Section */
.hero {
  padding: calc(60px + var(--spacing-2xl)) 0 var(--spacing-xl);
  background: var(--gradient-hero);
  position: relative;
  overflow: hidden;
  min-height: 520px;
  display: flex;
  align-items: center;
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(88, 166, 255, 0.06) 0%, transparent 70%);
  pointer-events: none;
}

.hero-inner {
  display: flex;
  align-items: center;
  gap: var(--spacing-xl);
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--spacing-md);
  width: 100%;
}

.hero-content {
  flex: 1;
  min-width: 0;
}

.hero-badge {
  display: inline-block;
  background: var(--accent-glow);
  color: var(--accent-cyan);
  font-size: 0.8rem;
  font-weight: 600;
  padding: 4px 14px;
  border-radius: 20px;
  border: 1px solid rgba(88, 166, 255, 0.2);
  margin-bottom: var(--spacing-sm);
  letter-spacing: 0.5px;
  text-transform: uppercase;
}

.hero h1 {
  font-size: 3rem;
  font-weight: 800;
  line-height: 1.15;
  margin-bottom: var(--spacing-sm);
}

.hero h1 .highlight {
  background: linear-gradient(135deg, var(--accent-cyan), var(--accent-green));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-text {
  font-size: 1.1rem;
  color: var(--text-secondary);
  margin-bottom: var(--spacing-lg);
  max-width: 480px;
}

.hero-buttons {
  display: flex;
  gap: var(--spacing-sm);
  flex-wrap: wrap;
}

.hero-device {
  flex-shrink: 0;
  position: relative;
  width: 280px;
}

/* Device Mockup */
.device-mockup {
  position: relative;
  width: 100%;
  max-width: 280px;
  margin: 0 auto;
}

.device-frame {
  position: relative;
  background: #000;
  border-radius: 28px;
  padding: 12px;
  box-shadow: var(--shadow-lg), 0 0 40px rgba(88, 166, 255, 0.08);
  border: 2px solid #30363d;
}

.device-frame img {
  width: 100%;
  border-radius: 18px;
  display: block;
}

.device-notch {
  position: absolute;
  top: 12px;
  left: 50%;
  transform: translateX(-50%);
  width: 80px;
  height: 20px;
  background: #000;
  border-radius: 0 0 14px 14px;
  z-index: 2;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 28px;
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  border: none;
  cursor: pointer;
  transition: all var(--transition);
  text-decoration: none;
  text-align: center;
  line-height: 1.4;
  white-space: nowrap;
}

.btn:hover {
  text-decoration: none;
  transform: translateY(-1px);
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent-green), var(--accent-lime));
  color: #0d1117;
}

.btn-primary:hover {
  color: #0d1117;
  box-shadow: 0 4px 16px rgba(181, 232, 83, 0.3);
}

.btn-secondary {
  background: var(--bg-card);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
}

.btn-secondary:hover {
  color: var(--text-primary);
  border-color: var(--accent-cyan);
  box-shadow: var(--shadow-glow);
}

.btn-outline {
  background: transparent;
  color: var(--accent-cyan);
  border: 1px solid var(--accent-cyan);
}

.btn-outline:hover {
  background: var(--accent-glow);
  color: var(--accent-cyan);
}

@media (max-width: 768px) {
  .btn-outline {
    border-width: 2px;
    background: rgba(88, 166, 255, 0.08);
  }
}

/* Sections */
.section {
  padding: var(--spacing-xl) 0;
}

.section-alt {
  background: var(--bg-secondary);
}

.section-header {
  text-align: center;
  margin-bottom: var(--spacing-xl);
}

.section-header h2 {
  font-size: 2rem;
  margin-bottom: var(--spacing-xs);
}

.section-header p {
  font-size: 1.05rem;
  max-width: 560px;
  margin: 0 auto;
}

/* Feature Blocks - Alternating Left/Right */
.feature-block {
  display: flex;
  align-items: center;
  gap: var(--spacing-xl);
  margin-bottom: var(--spacing-xl);
}

.feature-block:nth-child(even) {
  flex-direction: row-reverse;
}

.feature-block-content {
  flex: 1;
  text-align: left;
}

.feature-block-content h3 {
  font-size: 1.4rem;
  margin-bottom: var(--spacing-xs);
}

.feature-block-content p {
  font-size: 1rem;
  line-height: 1.7;
}

.feature-block-icon {
  flex-shrink: 0;
  width: 80px;
  height: 80px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--gradient-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
}

.feature-block-icon svg {
  width: 36px;
  height: 36px;
  color: var(--accent-cyan);
}

/* Screenshot Carousel */
.screenshot-section {
  padding: var(--spacing-xl) 0;
}

.carousel-wrapper {
  max-width: 400px;
  margin: 0 auto;
  position: relative;
  overflow: hidden;
}

.carousel-track {
  display: flex;
  transition: transform 0.4s ease;
  will-change: transform;
}

.carousel-slide {
  min-width: 100%;
  flex-shrink: 0;
  display: flex;
  justify-content: center;
  padding: 0 var(--spacing-sm);
}

.carousel-slide .device-mockup {
  max-width: 260px;
}

.carousel-nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  margin-top: var(--spacing-md);
}

.carousel-btn {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--transition);
  flex-shrink: 0;
}

.carousel-btn:hover {
  border-color: var(--accent-cyan);
  box-shadow: var(--shadow-glow);
}

.carousel-dots {
  display: flex;
  gap: 8px;
}

.carousel-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--border-color);
  border: none;
  cursor: pointer;
  transition: all var(--transition);
  padding: 0;
}

.carousel-dot.active {
  background: var(--accent-cyan);
  box-shadow: 0 0 8px rgba(88, 166, 255, 0.4);
}

/* Lightbox */
.lightbox {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.9);
  z-index: 2000;
  align-items: center;
  justify-content: center;
  cursor: pointer;
}

.lightbox.open {
  display: flex;
}

.lightbox img {
  max-width: 90vw;
  max-height: 90vh;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
}

.lightbox-close {
  position: absolute;
  top: 20px;
  right: 20px;
  width: 40px;
  height: 40px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 50%;
  color: var(--text-primary);
  font-size: 1.2rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* CTA Section */
.cta-section {
  padding: var(--spacing-xl) 0;
  text-align: center;
  background: var(--gradient-hero);
  position: relative;
}

.cta-section::before {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 500px;
  height: 300px;
  background: radial-gradient(ellipse, rgba(88, 166, 255, 0.06) 0%, transparent 70%);
  pointer-events: none;
}

.cta-section h2 {
  font-size: 2rem;
  margin-bottom: var(--spacing-xs);
}

.cta-section p {
  max-width: 500px;
  margin: 0 auto var(--spacing-md);
}

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

/* Footer */
.footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  padding: var(--spacing-xl) 0 var(--spacing-md);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: var(--spacing-xl);
  margin-bottom: var(--spacing-lg);
}

.footer-brand p {
  font-size: 0.9rem;
  margin-top: var(--spacing-xs);
  max-width: 320px;
}

.footer-col h4 {
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--text-muted);
  margin-bottom: var(--spacing-sm);
}

.footer-col ul {
  list-style: none;
}

.footer-col ul li {
  margin-bottom: var(--spacing-xs);
}

.footer-col ul a {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.footer-col ul a:hover {
  color: var(--text-primary);
}

.footer-bottom {
  border-top: 1px solid var(--border-color);
  padding-top: var(--spacing-md);
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* Content Pages (Privacy, Terms) */
.page-header {
  padding: calc(60px + var(--spacing-xl)) 0 var(--spacing-lg);
  background: var(--gradient-hero);
  text-align: center;
}

.page-header h1 {
  font-size: 2.2rem;
}

.page-header .subtitle {
  color: var(--text-secondary);
  font-size: 1rem;
}

.content-wrap {
  max-width: 800px;
  margin: 0 auto;
  padding: var(--spacing-xl) var(--spacing-md);
}

.content-wrap h2 {
  font-size: 1.5rem;
  margin-top: var(--spacing-lg);
  margin-bottom: var(--spacing-sm);
  padding-bottom: var(--spacing-xs);
  border-bottom: 1px solid var(--border-color);
}

.content-wrap h3 {
  margin-top: var(--spacing-md);
  margin-bottom: var(--spacing-xs);
  color: var(--accent-cyan);
}

.content-wrap p,
.content-wrap li {
  text-align: left;
  color: var(--text-secondary);
  line-height: 1.7;
}

.content-wrap ul,
.content-wrap ol {
  padding-left: var(--spacing-md);
  margin-bottom: var(--spacing-sm);
}

.content-wrap li {
  margin-bottom: var(--spacing-xs);
}

.effective-date {
  display: inline-block;
  background: var(--bg-card);
  padding: 6px 16px;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-top: var(--spacing-xs);
}

/* Contact Page */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-xl);
  max-width: 900px;
  margin: 0 auto;
  padding: var(--spacing-xl) var(--spacing-md);
}

.contact-info h2 {
  font-size: 1.5rem;
  margin-bottom: var(--spacing-sm);
}

.contact-info p {
  text-align: left;
  margin-bottom: var(--spacing-md);
}

.contact-detail {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  margin-bottom: var(--spacing-sm);
}

.contact-detail svg {
  flex-shrink: 0;
  color: var(--accent-cyan);
  margin-top: 2px;
}

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

.contact-form {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
}

.form-group {
  margin-bottom: var(--spacing-sm);
}

.form-group label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 6px;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 10px 14px;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-size: 0.95rem;
  font-family: var(--font-primary);
  transition: border-color var(--transition);
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--accent-cyan);
  box-shadow: 0 0 0 3px rgba(88, 166, 255, 0.1);
}

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

.form-group input[type="file"] {
  padding: 8px;
  cursor: pointer;
}

.form-group input[type="file"]::file-selector-button {
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  padding: 6px 14px;
  margin-right: 12px;
  cursor: pointer;
  font-size: 0.85rem;
}

.form-success {
  display: none;
  background: rgba(181, 232, 83, 0.1);
  border: 1px solid rgba(181, 232, 83, 0.3);
  border-radius: var(--radius-md);
  padding: var(--spacing-md);
  text-align: center;
  color: var(--accent-green);
  font-weight: 500;
}

.form-success.show {
  display: block;
}

/* Privacy Accept Button (Flutter Integration) */
.privacy-accept-bar {
  display: none;
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 3000;
  background: rgba(13, 17, 23, 0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-top: 1px solid var(--border-color);
  padding: var(--spacing-sm) var(--spacing-md);
  text-align: center;
}

.privacy-accept-bar.visible {
  display: block;
}

.privacy-accept-bar .btn-primary {
  min-width: 200px;
  padding: 14px 40px;
  font-size: 1.1rem;
}

/* Responsive */
@media (max-width: 1024px) {
  h1 { font-size: 2rem; }
  .hero h1 { font-size: 2.4rem; }
  .hero-inner { gap: var(--spacing-lg); }
  .hero-device { width: 240px; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: var(--spacing-lg); }
}

@media (max-width: 768px) {
  .nav-links { display: none; }
  .nav-links.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 60px;
    left: 0;
    right: 0;
    background: rgba(13, 17, 23, 0.98);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-color);
    padding: var(--spacing-sm) var(--spacing-md);
    gap: 4px;
  }
  .nav-links.open a {
    display: block;
    padding: 10px 0;
  }
  .nav-hamburger { display: block; }

  .hero {
    padding-top: calc(60px + var(--spacing-lg));
    min-height: auto;
  }
  .hero h1 { font-size: 2rem; }
  .hero-inner {
    flex-direction: column;
    text-align: center;
  }
  .hero-content { text-align: center; }
  .hero-text { margin-left: auto; margin-right: auto; }
  .hero-buttons { justify-content: center; }
  .hero-device { width: 200px; }

  .feature-block,
  .feature-block:nth-child(even) {
    flex-direction: column;
    text-align: center;
    gap: var(--spacing-sm);
  }
  .feature-block-content { text-align: left; }

  .section-header h2 { font-size: 1.5rem; }

  .contact-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
  }
  .footer-bottom {
    flex-direction: column;
    gap: var(--spacing-xs);
    text-align: center;
  }
  .carousel-slide .device-mockup {
    max-width: 200px;
  }
}

@media (max-width: 480px) {
  .hero h1 { font-size: 1.6rem; }
  .hero-text { font-size: 1rem; }
  .hero-device { width: 180px; }
  .btn { padding: 10px 20px; font-size: 0.9rem; }
  .page-header h1 { font-size: 1.6rem; }
  .content-wrap { padding: var(--spacing-lg) var(--spacing-sm); }
  .contact-form { padding: var(--spacing-md); }
  .carousel-slide .device-mockup {
    max-width: 170px;
  }
}

/* Lazy loading blur-up */
img[data-src] {
  filter: blur(5px);
  transition: filter 0.4s ease;
}

img.loaded {
  filter: blur(0);
}

/* Animations */
.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}