/* ===== MutilProxy Landing Page — Design System ===== */
:root {
  --accent: #42A5FF;
  --accent-hover: #2E95F2;
  --accent-soft: #EBF5FF;
  --accent-glow: rgba(66, 165, 255, 0.25);
  --bg-base: #F1F6FC;
  --bg-dark: #0B1120;
  --bg-dark-card: #111827;
  --bg-dark-soft: #1A2332;
  --bg-card: #FFFFFF;
  --text: #162130;
  --text-muted: #54657B;
  --text-light: #94A3B8;
  --text-on-dark: #E2E8F0;
  --border: #D1DFEF;
  --success: #10B981;
  --warning: #F59E0B;
  --danger: #EF4444;
  --purple: #8B5CF6;
  --orange: #F97316;
  --cyan: #06B6D4;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 20px;
  --radius-2xl: 24px;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.06);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.08);
  --shadow-lg: 0 8px 32px rgba(0,0,0,0.12);
  --shadow-glow: 0 0 40px var(--accent-glow);
  --font: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
}

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

html { scroll-behavior: smooth; scroll-padding-top: 80px; }

body {
  font-family: var(--font);
  color: var(--text);
  background: var(--bg-base);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

.container {
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ===== NAVBAR ===== */
.navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  padding: 16px 0;
  transition: all 0.3s ease;
  background: transparent;
}
.navbar.scrolled {
  background: rgba(241, 246, 252, 0.85);
  backdrop-filter: blur(16px) saturate(1.4);
  -webkit-backdrop-filter: blur(16px) saturate(1.4);
  border-bottom: 1px solid var(--border);
  padding: 10px 0;
  box-shadow: var(--shadow-sm);
}
.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.nav-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--text);
  font-weight: 800;
  font-size: 18px;
}
.brand-icon {
  width: 36px; height: 36px;
  background: linear-gradient(135deg, var(--accent), #1E6FD9);
  color: white;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 900;
  font-size: 16px;
}
.brand-icon-sm { width: 28px; height: 28px; font-size: 13px; }
.nav-links {
  display: flex;
  gap: 32px;
}
.nav-links a {
  text-decoration: none;
  color: var(--text-muted);
  font-weight: 500;
  font-size: 14px;
  transition: color 0.2s;
}
.nav-links a:hover { color: var(--accent); }

/* ===== BUTTONS ===== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 20px;
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: 14px;
  text-decoration: none;
  cursor: pointer;
  transition: all 0.25s ease;
  border: none;
}
.btn-primary {
  background: linear-gradient(135deg, var(--accent), #1E6FD9);
  color: white;
  box-shadow: 0 4px 16px var(--accent-glow);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px var(--accent-glow);
}
.btn-outline {
  background: transparent;
  color: var(--text);
  border: 1.5px solid var(--border);
}
.btn-outline:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-soft);
}
.btn-nav {
  background: var(--accent-soft);
  color: var(--accent);
  font-size: 13px;
  padding: 8px 16px;
}
.btn-nav:hover { background: var(--accent); color: white; }
.btn-lg { padding: 14px 28px; font-size: 15px; border-radius: var(--radius-lg); }

/* ===== HERO ===== */
.hero {
  position: relative;
  padding: 120px 0 80px;
  overflow: hidden;
}
.hero-glow {
  position: absolute;
  top: -200px; left: 50%; transform: translateX(-50%);
  width: 800px; height: 600px;
  background: radial-gradient(circle, var(--accent-glow) 0%, transparent 70%);
  pointer-events: none;
  animation: glowPulse 4s ease-in-out infinite;
}
@keyframes glowPulse {
  0%, 100% { opacity: 0.6; transform: translateX(-50%) scale(1); }
  50% { opacity: 1; transform: translateX(-50%) scale(1.1); }
}
.hero-content { position: relative; z-index: 1; }
.hero-split {
  display: grid;
  grid-template-columns: 5fr 7fr;
  gap: 48px;
  align-items: center;
}
.hero-text { text-align: left; }
.hero-badge {
  display: inline-block;
  background: var(--accent-soft);
  color: var(--accent);
  padding: 6px 16px;
  border-radius: 50px;
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 20px;
  border: 1px solid rgba(66, 165, 255, 0.2);
}
.hero h1 {
  font-size: 30px;
  font-weight: 900;
  line-height: 1.3;
  margin-bottom: 16px;
  letter-spacing: -0.02em;
  white-space: nowrap;
}
.gradient-text {
  background: linear-gradient(135deg, var(--accent), #06B6D4, var(--purple));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero-sub {
  max-width: 480px;
  margin: 0 0 24px;
  font-size: 16px;
  color: var(--text-muted);
  line-height: 1.7;
}
.hero-btns {
  display: flex;
  gap: 16px;
  margin-bottom: 28px;
}
.hero-stats {
  display: inline-flex;
  align-items: center;
  gap: 24px;
  background: var(--bg-card);
  padding: 12px 24px;
  border-radius: var(--radius-xl);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-md);
}
.stat { text-align: center; }
.stat-num {
  display: block;
  font-size: 20px;
  font-weight: 800;
  color: var(--accent);
}
.stat-label {
  font-size: 11px;
  color: var(--text-muted);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.stat-divider {
  width: 1px; height: 28px;
  background: var(--border);
}

/* Hero Video */
.hero-video {
  position: relative;
}
.video-container {
  position: relative;
  width: 100%;
  padding-bottom: 56.25%;
  border-radius: var(--radius-xl);
  overflow: hidden;
  background: var(--bg-dark);
  border: 2px solid var(--border);
  box-shadow: var(--shadow-lg), var(--shadow-glow);
}
.video-container iframe {
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 100%;
}
.video-placeholder {
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.3s ease;
  background: linear-gradient(135deg, var(--bg-dark), #1a2744);
}
.video-placeholder:hover { background: linear-gradient(135deg, #111827, #1e3a5f); }
.play-btn {
  width: 72px; height: 72px;
  background: var(--accent);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 12px;
  box-shadow: 0 0 30px var(--accent-glow);
  transition: transform 0.3s ease;
}
.video-placeholder:hover .play-btn {
  transform: scale(1.1);
}
.play-btn svg { margin-left: 4px; }
.video-placeholder p {
  color: var(--text-light);
  font-size: 14px;
  font-weight: 500;
}

/* ===== SECTIONS ===== */
.section-header {
  text-align: center;
  margin-bottom: 48px;
}
.section-badge {
  display: inline-block;
  background: var(--accent-soft);
  color: var(--accent);
  padding: 5px 14px;
  border-radius: 50px;
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 12px;
}
.section-header h2 {
  font-size: 36px;
  font-weight: 800;
  margin-bottom: 12px;
  letter-spacing: -0.01em;
}
.section-header p {
  color: var(--text-muted);
  font-size: 16px;
  max-width: 520px;
  margin: 0 auto;
}

/* ===== FEATURES ===== */
.features { padding: 80px 0; }
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: 28px;
  transition: all 0.3s ease;
}
.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--accent);
}
.feature-icon {
  width: 48px; height: 48px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
}
.icon-blue { background: #EBF5FF; color: var(--accent); }
.icon-green { background: #ECFDF5; color: var(--success); }
.icon-purple { background: #F3F0FF; color: var(--purple); }
.icon-orange { background: #FFF7ED; color: var(--orange); }
.icon-cyan { background: #ECFEFF; color: var(--cyan); }
.icon-red { background: #FEF2F2; color: var(--danger); }
.feature-card h3 {
  font-size: 17px;
  font-weight: 700;
  margin-bottom: 8px;
}
.feature-card p {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.6;
}

/* ===== HOW IT WORKS ===== */
.how-it-works {
  padding: 80px 0;
  background: var(--bg-card);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}
.steps-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.step-card {
  position: relative;
  background: var(--bg-base);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: 32px 28px;
  transition: all 0.3s ease;
}
.step-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}
.step-number {
  font-size: 48px;
  font-weight: 900;
  background: linear-gradient(135deg, var(--accent), transparent);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  opacity: 0.3;
  margin-bottom: 8px;
  line-height: 1;
}
.step-card h3 {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 10px;
}
.step-card p {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.7;
}
.step-card code {
  background: var(--accent-soft);
  color: var(--accent);
  padding: 2px 7px;
  border-radius: 4px;
  font-size: 13px;
  font-weight: 600;
}

/* ===== DOWNLOAD ===== */
.download-section {
  padding: 80px 0;
}
.download-card {
  background: var(--bg-card);
  border: 2px solid var(--border);
  border-radius: var(--radius-2xl);
  padding: 32px 36px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  box-shadow: var(--shadow-md);
  transition: all 0.3s ease;
}
.download-card:hover {
  border-color: var(--accent);
  box-shadow: var(--shadow-lg), var(--shadow-glow);
}
.download-info {
  display: flex;
  align-items: center;
  gap: 20px;
}
.download-icon {
  width: 56px; height: 56px;
  background: linear-gradient(135deg, var(--accent), #1E6FD9);
  color: white;
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.download-meta h3 {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 4px;
}
.download-ver {
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 8px;
}
.download-tags {
  display: flex;
  gap: 6px;
}
.tag {
  padding: 3px 10px;
  border-radius: 50px;
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}
.tag-blue {
  background: var(--accent-soft);
  color: var(--accent);
}
.tag-green {
  background: #ECFDF5;
  color: var(--success);
}
.download-actions {
  text-align: center;
  flex-shrink: 0;
}
.download-btn {
  padding: 16px 32px;
  font-size: 16px;
}
.download-note {
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 10px;
}
.download-requirements {
  margin-top: 28px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: 24px 32px;
}
.download-requirements h4 {
  font-size: 14px;
  font-weight: 700;
  margin-bottom: 16px;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.req-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}
.req-item {
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.req-label {
  font-size: 11px;
  font-weight: 600;
  color: var(--text-light);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
.req-value {
  font-size: 14px;
  font-weight: 600;
  color: var(--text);
}


/* ===== FAQ ===== */
.faq-section {
  padding: 80px 0;
  background: var(--bg-card);
  border-top: 1px solid var(--border);
}
.faq-list {
  max-width: 680px;
  margin: 0 auto;
}
.faq-item {
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  margin-bottom: 12px;
  overflow: hidden;
  transition: all 0.3s ease;
}
.faq-item[open] {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
}
.faq-item summary {
  padding: 16px 20px;
  font-weight: 600;
  font-size: 15px;
  cursor: pointer;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: background 0.2s;
}
.faq-item summary:hover { background: var(--accent-soft); }
.faq-item summary::after {
  content: '+';
  font-size: 20px;
  font-weight: 300;
  color: var(--text-muted);
  transition: transform 0.3s;
}
.faq-item[open] summary::after {
  transform: rotate(45deg);
  color: var(--accent);
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item p {
  padding: 0 20px 16px;
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.7;
}

/* ===== CTA ===== */
.cta-section { padding: 60px 0 80px; }
.cta-card {
  background: linear-gradient(135deg, var(--bg-dark), #1a2744);
  border-radius: var(--radius-2xl);
  padding: 56px 40px;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.cta-card::before {
  content: '';
  position: absolute;
  top: -50%; left: -50%;
  width: 200%; height: 200%;
  background: radial-gradient(circle at 70% 30%, var(--accent-glow) 0%, transparent 50%);
  pointer-events: none;
}
.cta-card h2 {
  font-size: 32px;
  font-weight: 800;
  color: white;
  margin-bottom: 12px;
  position: relative;
}
.cta-card p {
  color: var(--text-light);
  font-size: 16px;
  margin-bottom: 28px;
  position: relative;
}
.cta-card .btn { position: relative; }

/* ===== FOOTER ===== */
.footer {
  padding: 24px 0;
  border-top: 1px solid var(--border);
}
.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.footer-brand {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 700;
  font-size: 15px;
}
.footer-copy {
  font-size: 13px;
  color: var(--text-muted);
}

/* ===== ANIMATIONS ===== */
.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}
.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}
.fade-in:nth-child(2) { transition-delay: 0.1s; }
.fade-in:nth-child(3) { transition-delay: 0.2s; }
.fade-in:nth-child(4) { transition-delay: 0.1s; }
.fade-in:nth-child(5) { transition-delay: 0.2s; }
.fade-in:nth-child(6) { transition-delay: 0.3s; }

/* ===== RESPONSIVE ===== */
@media (max-width: 768px) {
  .nav-links { display: none; }
  .hero h1 { font-size: 28px; white-space: normal; }
  .hero { padding: 110px 0 50px; }
  .hero-sub { font-size: 14px; }
  .hero-split { grid-template-columns: 1fr; gap: 32px; }
  .hero-text { text-align: center; }
  .hero-sub { margin-left: auto; margin-right: auto; }
  .hero-btns { justify-content: center; }
  .hero-stats { margin: 0 auto; }
  .features-grid,
  .steps-grid { grid-template-columns: 1fr; }
  .section-header h2 { font-size: 28px; }
  .download-card { flex-direction: column; text-align: center; }
  .download-info { flex-direction: column; }
  .req-grid { grid-template-columns: repeat(2, 1fr); }
  .cta-card { padding: 40px 24px; }
  .cta-card h2 { font-size: 24px; }
  .footer-inner { flex-direction: column; gap: 12px; text-align: center; }
}