/* ============ Site 2 - Dark Navy Professional ============ */
:root {
  --primary: #6366f1;
  --primary-dark: #4f46e5;
  --primary-light: #e0e7ff;
  --accent: #06b6d4;
  --bg: #0f172a;
  --bg-alt: #1e293b;
  --bg-card: #1e293b;
  --text: #f1f5f9;
  --text-muted: #94a3b8;
  --border: #334155;
  --shadow: 0 4px 20px rgba(0,0,0,0.3);
  --shadow-lg: 0 20px 60px rgba(0,0,0,0.4);
  --radius: 6px;
  --radius-lg: 16px;
  --max-width: 1160px;
  --nav-height: 72px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
}

@keyframes spin { from { transform: rotate(0deg); } to { transform: rotate(360deg); } }

header {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--nav-height);
  background: rgba(15,23,42,0.95);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  z-index: 1000;
}
nav {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.nav-brand {
  font-size: 20px;
  font-weight: 700;
  background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 10px;
}
.nav-links {
  display: flex;
  gap: 8px;
  list-style: none;
}
.nav-links a {
  text-decoration: none;
  color: var(--text-muted);
  font-size: 14px;
  font-weight: 500;
  padding: 10px 20px;
  border-radius: 6px;
  transition: all 0.2s;
}
.nav-links a:hover {
  color: var(--text);
  background: var(--bg-alt);
}
.nav-links a.active {
  color: #fff;
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
}

.hero {
  padding: 160px 24px 100px;
  max-width: var(--max-width);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 80px;
  align-items: center;
}
.hero-content h1 {
  font-size: 52px;
  line-height: 1.1;
  font-weight: 800;
  margin-bottom: 24px;
  letter-spacing: -1px;
}
.hero-content h1 span {
  background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}
.hero-content p {
  font-size: 17px;
  color: var(--text-muted);
  margin-bottom: 36px;
  line-height: 1.8;
}
.hero-visual {
  position: relative;
  min-height: 400px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.hero-visual::before {
  content: "";
  position: absolute;
  width: 320px;
  height: 320px;
  background: radial-gradient(circle, var(--primary) 0%, transparent 70%);
  opacity: 0.3;
  border-radius: 50%;
  filter: blur(60px);
}
.hero-visual svg { position: relative; z-index: 1; }

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 28px;
  border-radius: var(--radius);
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  border: none;
  text-decoration: none;
  transition: all 0.2s;
}
.btn-primary {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  color: #fff;
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 30px rgba(99,102,241,0.4); }
.btn-secondary {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--border);
  margin-left: 12px;
}
.btn-secondary:hover { background: var(--bg-alt); border-color: var(--primary); }
.btn-lg { padding: 16px 36px; font-size: 17px; }

.section {
  padding: 100px 24px;
  max-width: var(--max-width);
  margin: 0 auto;
}
.section-alt { background: var(--bg-alt); }
.section-title {
  margin-bottom: 64px;
}
.section-title h2 {
  font-size: 38px;
  font-weight: 700;
  margin-bottom: 16px;
}
.section-title p {
  font-size: 17px;
  color: var(--text-muted);
  max-width: 520px;
}

.features-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.feature-item {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px 32px;
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 24px;
  align-items: center;
  transition: all 0.25s;
}
.feature-item:hover {
  border-color: var(--primary);
  box-shadow: var(--shadow);
  transform: translateX(8px);
}
.feature-icon {
  width: 52px;
  height: 52px;
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.feature-icon svg { width: 26px; height: 26px; color: #fff; }
.feature-item h3 { font-size: 18px; font-weight: 600; margin-bottom: 6px; }
.feature-item p { font-size: 14px; color: var(--text-muted); line-height: 1.6; }
.feature-arrow { color: var(--text-muted); font-size: 20px; }

.download-section {
  background: linear-gradient(135deg, #1e1b4b 0%, #312e81 50%, #1e293b 100%);
  padding: 100px 24px;
  position: relative;
  overflow: hidden;
}
.download-section::before {
  content: "";
  position: absolute;
  top: -100px; right: -100px;
  width: 400px; height: 400px;
  background: radial-gradient(circle, var(--accent) 0%, transparent 60%);
  opacity: 0.15;
}
.download-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  position: relative;
  z-index: 1;
}
.download-section .section-title { text-align: center; }
.download-section h2 { font-size: 38px; font-weight: 700; margin-bottom: 16px; }
.download-section p { font-size: 17px; color: var(--text-muted); }
.platform-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-top: 48px;
}
.platform-card {
  background: rgba(30,41,59,0.8);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px 24px;
  text-align: center;
  transition: all 0.25s;
}
.platform-card:hover { border-color: var(--primary); transform: translateY(-4px); }
.platform-card svg { width: 44px; height: 44px; margin-bottom: 14px; }
.platform-card h4 { font-size: 16px; font-weight: 600; margin-bottom: 8px; }
.platform-card p { font-size: 13px; color: var(--text-muted); margin-bottom: 18px; }

.detail-blocks { display: flex; flex-direction: column; gap: 80px; }
.detail-block {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}
.detail-block:nth-child(even) .detail-visual { order: -1; }
.detail-block h3 { font-size: 30px; font-weight: 700; margin-bottom: 20px; }
.detail-block h3 span {
  background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}
.detail-block p { color: var(--text-muted); line-height: 1.9; margin-bottom: 14px; font-size: 15px; }
.detail-visual {
  background: var(--bg-alt);
  border-radius: var(--radius-lg);
  padding: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 280px;
  border: 1px solid var(--border);
  position: relative;
  overflow: hidden;
}
.detail-visual::before {
  content: "";
  position: absolute;
  width: 200px; height: 200px;
  background: radial-gradient(circle, var(--primary) 0%, transparent 70%);
  opacity: 0.1;
  border-radius: 50%;
}

.reviews-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.review-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px;
  position: relative;
}
.review-stars { color: #fbbf24; font-size: 15px; margin-bottom: 14px; }
.review-text { font-size: 15px; line-height: 1.8; color: var(--text-muted); margin-bottom: 20px; position: relative; z-index: 1; }
.review-author { font-size: 14px; font-weight: 600; }
.review-role { font-size: 13px; color: var(--text-muted); }

.stats-bar {
  background: var(--bg-alt);
  padding: 56px 24px;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}
.stats-bar-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 40px;
  text-align: center;
}
.stats-bar-item .sb-num {
  font-size: 40px;
  font-weight: 800;
  background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}
.stats-bar-item .sb-label { font-size: 14px; color: var(--text-muted); margin-top: 6px; }

.compare-table-wrap {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}
.compare-table { width: 100%; border-collapse: collapse; }
.compare-table th {
  background: var(--bg-alt);
  padding: 18px 24px;
  text-align: left;
  font-size: 14px;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 1px;
  border-bottom: 1px solid var(--border);
}
.compare-table td {
  padding: 18px 24px;
  border-bottom: 1px solid var(--border);
  font-size: 15px;
}
.compare-table tr:last-child td { border-bottom: none; }
.check-yes { color: #34d399; font-weight: 600; }
.check-no { color: #f87171; }

.faq-list { max-width: 800px; margin: 0 auto; display: flex; flex-direction: column; gap: 10px; }
.faq-item { border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; background: var(--bg-card); }
.faq-question {
  width: 100%;
  padding: 20px 24px;
  background: transparent;
  border: none;
  font-size: 15px;
  font-weight: 600;
  text-align: left;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: var(--text);
}
.faq-question::after { content: "+"; font-size: 18px; color: var(--primary); }
.faq-item.active .faq-question::after { content: "\2212"; }
.faq-answer { max-height: 0; overflow: hidden; transition: max-height 0.3s; }
.faq-item.active .faq-answer { max-height: 500px; }
.faq-answer-inner { padding: 0 24px 20px; font-size: 14px; color: var(--text-muted); line-height: 1.9; }

.download-hero {
  padding: 160px 24px 80px;
  max-width: var(--max-width);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}
.download-hero h1 { font-size: 44px; font-weight: 800; margin-bottom: 20px; }
.download-hero h1 span {
  background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}
.download-hero p { font-size: 16px; color: var(--text-muted); margin-bottom: 32px; line-height: 1.8; }
.download-meta { display: flex; gap: 24px; margin-bottom: 28px; font-size: 13px; color: var(--text-muted); }

.install-steps { counter-reset: step; }
.install-step { display: flex; gap: 24px; margin-bottom: 36px; align-items: flex-start; }
.step-num {
  width: 44px; height: 44px;
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  color: #fff;
  border-radius: 12px;
  display: flex; align-items: center; justify-content: center;
  font-weight: 700; flex-shrink: 0;
}
.step-content h4 { font-size: 18px; font-weight: 600; margin-bottom: 8px; }
.step-content p { font-size: 14px; color: var(--text-muted); line-height: 1.8; }

.sys-req-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; }
.sys-req-card { background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius-lg); padding: 28px; }
.sys-req-card h4 { font-size: 16px; font-weight: 600; margin-bottom: 16px; display: flex; align-items: center; gap: 10px; }
.sys-req-card ul { list-style: none; }
.sys-req-card li { padding: 10px 0; font-size: 14px; color: var(--text-muted); border-bottom: 1px solid var(--border); display: flex; justify-content: space-between; }
.sys-req-card li:last-child { border-bottom: none; }

.changelog { display: flex; flex-direction: column; gap: 14px; }
.changelog-item { background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius); padding: 24px; }
.changelog-item .cl-ver { font-size: 15px; font-weight: 700; color: var(--primary); }
.changelog-item .cl-date { font-size: 13px; color: var(--text-muted); margin-bottom: 10px; }
.changelog-item ul { padding-left: 18px; }
.changelog-item li { font-size: 14px; color: var(--text-muted); margin-bottom: 6px; }

.cta-banner {
  background: linear-gradient(135deg, var(--primary-dark) 0%, #4338ca 50%, var(--accent) 100%);
  padding: 72px 24px;
  text-align: center;
  border-radius: var(--radius-lg);
  margin: 60px auto;
  max-width: var(--max-width);
  position: relative;
  overflow: hidden;
}
.cta-banner::before {
  content: ""; position: absolute; top: -50%; left: -50%;
  width: 100%; height: 100%;
  background: radial-gradient(circle, rgba(255,255,255,0.05) 0%, transparent 60%);
}
.cta-banner h3 { font-size: 32px; font-weight: 700; margin-bottom: 12px; position: relative; }
.cta-banner p { font-size: 17px; opacity: 0.85; margin-bottom: 28px; position: relative; }

footer {
  background: #020617;
  color: #475569;
  padding: 48px 24px;
  text-align: center;
  font-size: 13px;
  border-top: 1px solid var(--border);
}
footer p { max-width: 600px; margin: 0 auto; line-height: 1.8; }

@media (max-width: 768px) {
  .hero, .download-hero { grid-template-columns: 1fr; }
  .features-list { gap: 12px; }
  .feature-item { grid-template-columns: auto 1fr; }
  .feature-arrow { display: none; }
  .reviews-grid, .platform-grid, .stats-bar-inner { grid-template-columns: 1fr; }
  .detail-block { grid-template-columns: 1fr; }
  .hero-content h1, .download-hero h1 { font-size: 34px; }
}