/* ==========================================================================
   TKR DESK — STYLESHEET (High-Performance Modern Dark Mode SaaS)
   ========================================================================== */

:root {
  --bg-primary: #07090e;
  --bg-secondary: #0d121d;
  --bg-card: rgba(17, 24, 39, 0.7);
  --bg-card-hover: rgba(26, 36, 56, 0.85);
  --border-subtle: rgba(255, 255, 255, 0.08);
  --border-active: rgba(56, 189, 248, 0.35);
  
  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  
  --accent-blue: #2563eb;
  --accent-cyan: #38bdf8;
  --accent-indigo: #6366f1;
  --accent-purple: #a855f7;
  --accent-emerald: #10b981;
  --accent-amber: #f59e0b;
  
  --font-sans: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
  
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  
  --shadow-glow: 0 0 35px rgba(56, 189, 248, 0.15);
  --shadow-card: 0 10px 30px -10px rgba(0, 0, 0, 0.5);
}

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

html {
  scroll-behavior: smooth;
  color-scheme: dark;
}

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

/* Background Ambient Glows & Grid */
.bg-glow {
  position: fixed;
  border-radius: 50%;
  filter: blur(120px);
  pointer-events: none;
  z-index: 0;
  opacity: 0.35;
}

.glow-1 {
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, var(--accent-blue) 0%, transparent 70%);
  top: -100px;
  left: 20%;
}

.glow-2 {
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, var(--accent-indigo) 0%, transparent 70%);
  top: 40%;
  right: -100px;
}

.bg-grid {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image: 
    linear-gradient(to right, rgba(255, 255, 255, 0.03) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
  background-size: 40px 40px;
  pointer-events: none;
  z-index: 0;
  mask-image: radial-gradient(circle at 50% 30%, black 40%, transparent 80%);
}

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  position: relative;
  z-index: 1;
}

/* ==========================================================================
   NAVIGATION
   ========================================================================== */
.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(16px);
  background: rgba(7, 9, 14, 0.8);
  border-bottom: 1px solid var(--border-subtle);
  padding: 16px 0;
}

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

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: var(--text-primary);
}

.logo-icon {
  width: 38px;
  height: 38px;
  background: linear-gradient(135deg, var(--accent-blue), var(--accent-indigo));
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  box-shadow: 0 0 16px rgba(37, 99, 235, 0.4);
}

.logo-icon svg {
  width: 22px;
  height: 22px;
}

.logo-text {
  font-size: 1.35rem;
  font-weight: 800;
  letter-spacing: -0.02em;
}

.accent-text {
  color: var(--accent-cyan);
}

.nav-links {
  display: flex;
  gap: 32px;
}

.nav-links a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 500;
  transition: color 0.2s;
}

.nav-links a:hover {
  color: var(--text-primary);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  font-family: var(--font-sans);
  font-weight: 600;
  text-decoration: none;
  border-radius: var(--radius-md);
  transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
  cursor: pointer;
  border: 1px solid transparent;
}

.btn-primary {
  background: linear-gradient(135deg, #2563eb, #1d4ed8);
  color: #fff;
  box-shadow: 0 4px 20px rgba(37, 99, 235, 0.35);
}

.btn-primary:hover {
  background: linear-gradient(135deg, #3b82f6, #2563eb);
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(37, 99, 235, 0.5);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-primary);
  border: 1px solid var(--border-subtle);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.2);
}

.btn-sm {
  padding: 8px 18px;
  font-size: 0.88rem;
}

.btn-lg {
  padding: 14px 26px;
  font-size: 1.05rem;
  flex-direction: column;
  align-items: flex-start;
  gap: 4px;
}

.btn-xl {
  padding: 18px 36px;
  font-size: 1.15rem;
}

.btn-subtext {
  font-size: 0.75rem;
  opacity: 0.8;
  font-weight: 400;
}

.btn-icon {
  width: 20px;
  height: 20px;
}

/* ==========================================================================
   HERO SECTION
   ========================================================================== */
.hero {
  padding: 80px 0 60px;
  text-align: center;
}

.hero-content {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: rgba(56, 189, 248, 0.1);
  border: 1px solid rgba(56, 189, 248, 0.25);
  padding: 6px 16px;
  border-radius: 999px;
  margin-bottom: 28px;
}

.pulse-dot {
  width: 8px;
  height: 8px;
  background-color: var(--accent-cyan);
  border-radius: 50%;
  box-shadow: 0 0 10px var(--accent-cyan);
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0% { transform: scale(0.95); opacity: 0.8; }
  50% { transform: scale(1.4); opacity: 1; }
  100% { transform: scale(0.95); opacity: 0.8; }
}

.badge-text {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--accent-cyan);
}

.hero-title {
  font-size: 3.8rem;
  font-weight: 800;
  line-height: 1.12;
  letter-spacing: -0.03em;
  margin-bottom: 24px;
  max-width: 900px;
}

.gradient-text {
  background: linear-gradient(135deg, #38bdf8 0%, #818cf8 50%, #c084fc 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-subtitle {
  font-size: 1.22rem;
  color: var(--text-secondary);
  max-width: 780px;
  margin-bottom: 38px;
  line-height: 1.65;
}

.hero-subtitle strong {
  color: var(--text-primary);
}

.hero-cta-group {
  display: flex;
  gap: 18px;
  margin-bottom: 36px;
}

.hero-trust {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 28px;
  margin-bottom: 50px;
  color: var(--text-secondary);
  font-size: 0.9rem;
  font-weight: 500;
}

.trust-item {
  display: flex;
  align-items: center;
  gap: 8px;
}

.check-icon {
  width: 16px;
  height: 16px;
  color: var(--accent-emerald);
}

/* ==========================================================================
   APP MOCKUP PREVIEW
   ========================================================================== */
.mockup-wrapper {
  width: 100%;
  max-width: 1000px;
  margin: 0 auto;
  perspective: 1000px;
}

.mockup-frame {
  background: var(--bg-secondary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  box-shadow: 0 25px 60px -15px rgba(0, 0, 0, 0.7), 0 0 40px rgba(56, 189, 248, 0.1);
  overflow: hidden;
  text-align: left;
}

.window-header {
  background: rgba(13, 18, 29, 0.95);
  border-bottom: 1px solid var(--border-subtle);
  padding: 12px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

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

.dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
}
.dot-red { background: #ef4444; }
.dot-yellow { background: #f59e0b; }
.dot-green { background: #10b981; }

.window-title {
  font-size: 0.85rem;
  color: var(--text-muted);
  font-family: var(--font-mono);
}

.window-status {
  font-size: 0.82rem;
  color: var(--accent-emerald);
  display: flex;
  align-items: center;
  gap: 6px;
  font-weight: 600;
}

.live-indicator {
  width: 8px;
  height: 8px;
  background: var(--accent-emerald);
  border-radius: 50%;
  box-shadow: 0 0 8px var(--accent-emerald);
}

.window-body {
  display: grid;
  grid-template-columns: 200px 1fr;
  height: 480px;
}

.app-sidebar {
  background: rgba(10, 14, 23, 0.95);
  border-right: 1px solid var(--border-subtle);
  padding: 20px 14px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.app-logo {
  font-weight: 800;
  font-size: 1.05rem;
  display: flex;
  align-items: center;
  gap: 6px;
}

.app-logo-badge {
  background: var(--accent-blue);
  color: #fff;
  padding: 2px 6px;
  border-radius: 6px;
  font-size: 0.8rem;
}

.app-nav {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.app-nav-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  font-size: 0.86rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s;
}

.app-nav-item svg {
  width: 18px;
  height: 18px;
}

.app-nav-item.active, .app-nav-item:hover {
  background: rgba(37, 99, 235, 0.15);
  color: var(--accent-cyan);
}

.app-main {
  background: #090d16;
  display: flex;
  flex-direction: column;
}

.app-topbar {
  padding: 14px 20px;
  border-bottom: 1px solid var(--border-subtle);
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: rgba(13, 18, 29, 0.5);
}

.id-card {
  display: flex;
  flex-direction: column;
}

.id-label {
  font-size: 0.72rem;
  color: var(--text-muted);
  font-weight: 600;
  letter-spacing: 0.05em;
}

.id-number {
  font-family: var(--font-mono);
  font-size: 1.15rem;
  color: var(--accent-cyan);
  font-weight: 700;
  letter-spacing: 0.05em;
}

.connect-box {
  display: flex;
  gap: 8px;
}

.connect-input {
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--border-subtle);
  color: #fff;
  font-family: var(--font-mono);
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  width: 160px;
}

.btn-connect {
  background: var(--accent-blue);
  color: #fff;
  border: none;
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 0.88rem;
  cursor: pointer;
  transition: 0.2s;
}

.btn-connect:hover {
  background: #1d4ed8;
}

.remote-viewport {
  flex: 1;
  position: relative;
  background: radial-gradient(circle at center, #111a2e 0%, #060911 100%);
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.viewport-overlay {
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: 16px;
}

.stream-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.stat-badge {
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(8px);
  border: 1px solid var(--border-subtle);
  padding: 5px 12px;
  border-radius: 999px;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: 6px;
}

.green-dot {
  width: 6px;
  height: 6px;
  background: var(--accent-emerald);
  border-radius: 50%;
}

.desktop-taskbar {
  background: rgba(15, 23, 42, 0.85);
  backdrop-filter: blur(12px);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 8px 16px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.85rem;
}

.taskbar-item.active {
  background: rgba(56, 189, 248, 0.15);
  color: var(--accent-cyan);
  padding: 4px 10px;
  border-radius: 4px;
}

.taskbar-time {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* ==========================================================================
   PILLARS / ARCHITECTURE SECTION
   ========================================================================== */
.section {
  padding: 100px 0;
}

.section-header {
  text-align: center;
  max-width: 700px;
  margin: 0 auto 60px;
}

.section-tag {
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--accent-cyan);
  text-transform: uppercase;
  margin-bottom: 12px;
  display: inline-block;
}

.section-title {
  font-size: 2.5rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 16px;
}

.section-desc {
  font-size: 1.1rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

.pillars-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
}

.pillar-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 38px;
  transition: all 0.3s;
  position: relative;
  overflow: hidden;
  backdrop-filter: blur(10px);
}

.pillar-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-active);
  background: var(--bg-card-hover);
  box-shadow: var(--shadow-glow);
}

.highlight-card {
  border-color: rgba(99, 102, 241, 0.3);
  background: linear-gradient(145deg, rgba(99, 102, 241, 0.08) 0%, rgba(17, 24, 39, 0.8) 100%);
}

.card-badge {
  position: absolute;
  top: 24px;
  right: 24px;
  background: linear-gradient(135deg, var(--accent-indigo), var(--accent-purple));
  color: #fff;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  padding: 4px 10px;
  border-radius: 999px;
}

.pillar-icon-box {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 22px;
}

.pillar-icon-box svg {
  width: 28px;
  height: 28px;
}

.icon-blue { background: rgba(37, 99, 235, 0.15); color: var(--accent-blue); }
.icon-purple { background: rgba(168, 85, 247, 0.15); color: var(--accent-purple); }
.icon-amber { background: rgba(245, 158, 11, 0.15); color: var(--accent-amber); }
.icon-emerald { background: rgba(16, 185, 129, 0.15); color: var(--accent-emerald); }

.pillar-number {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-muted);
  font-weight: 600;
  margin-bottom: 8px;
}

.pillar-title {
  font-size: 1.45rem;
  font-weight: 700;
  margin-bottom: 14px;
  line-height: 1.3;
}

.pillar-text {
  color: var(--text-secondary);
  font-size: 0.98rem;
  margin-bottom: 20px;
  line-height: 1.6;
}

.pillar-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.pillar-list li {
  font-size: 0.92rem;
  color: var(--text-secondary);
  padding-left: 20px;
  position: relative;
}

.pillar-list li::before {
  content: "→";
  position: absolute;
  left: 0;
  color: var(--accent-cyan);
  font-weight: 700;
}

.pillar-list kbd {
  background: rgba(255, 255, 255, 0.1);
  padding: 2px 6px;
  border-radius: 4px;
  font-family: var(--font-mono);
  font-size: 0.85em;
  color: #fff;
  border: 1px solid var(--border-subtle);
}

/* ==========================================================================
   COMPARISON TABLE
   ========================================================================== */
.table-responsive {
  overflow-x: auto;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  background: var(--bg-secondary);
  box-shadow: var(--shadow-card);
}

.comparison-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.95rem;
}

.comparison-table th, .comparison-table td {
  padding: 18px 24px;
  border-bottom: 1px solid var(--border-subtle);
}

.comparison-table th {
  background: rgba(13, 18, 29, 0.95);
  font-weight: 700;
  color: var(--text-muted);
  font-size: 0.88rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.comparison-table .highlight-col {
  background: rgba(37, 99, 235, 0.08);
  color: var(--accent-cyan);
  font-weight: 600;
}

.comparison-table th.highlight-col {
  color: var(--accent-cyan);
  border-top: 2px solid var(--accent-cyan);
}

.comparison-table .check {
  color: var(--accent-emerald);
  font-weight: 600;
}

.comparison-table .warn {
  color: var(--accent-amber);
}

.comparison-table .cross {
  color: var(--text-muted);
}

/* ==========================================================================
   DOWNLOAD SECTION
   ========================================================================== */
.download-section {
  text-align: center;
}

.download-card {
  background: linear-gradient(145deg, rgba(37, 99, 235, 0.12) 0%, rgba(13, 18, 29, 0.95) 100%);
  border: 1px solid rgba(56, 189, 248, 0.3);
  border-radius: var(--radius-xl);
  padding: 60px 40px;
  box-shadow: 0 0 50px rgba(37, 99, 235, 0.2);
}

.download-badge {
  display: inline-block;
  background: var(--accent-emerald);
  color: #064e3b;
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  padding: 5px 14px;
  border-radius: 999px;
  margin-bottom: 20px;
}

.download-title {
  font-size: 2.8rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 16px;
}

.download-desc {
  font-size: 1.15rem;
  color: var(--text-secondary);
  max-width: 680px;
  margin: 0 auto 36px;
  line-height: 1.6;
}

.download-buttons {
  margin-bottom: 30px;
}

.download-specs {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 24px;
  font-size: 0.88rem;
  color: var(--text-muted);
}

.download-specs code {
  font-family: var(--font-mono);
  color: var(--accent-cyan);
}

/* ==========================================================================
   FAQ SECTION
   ========================================================================== */
.faq-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.faq-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 30px;
  backdrop-filter: blur(8px);
}

.faq-question {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--text-primary);
}

.faq-answer {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

.faq-answer kbd {
  background: rgba(255, 255, 255, 0.1);
  padding: 2px 6px;
  border-radius: 4px;
  font-family: var(--font-mono);
  font-size: 0.85em;
  color: #fff;
}

/* ==========================================================================
   FOOTER
   ========================================================================== */
.footer {
  border-top: 1px solid var(--border-subtle);
  padding: 70px 0 30px;
  background: #05070a;
}

.footer-content {
  display: flex;
  justify-content: space-between;
  gap: 60px;
  margin-bottom: 50px;
}

.footer-brand {
  max-width: 400px;
}

.footer-tagline {
  color: var(--text-secondary);
  font-size: 0.95rem;
  margin: 14px 0 8px;
}

.footer-credit {
  color: var(--text-muted);
  font-size: 0.88rem;
}

.footer-links {
  display: flex;
  gap: 60px;
}

.link-group {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.link-group h4 {
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--text-primary);
  margin-bottom: 4px;
}

.link-group a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.9rem;
  transition: color 0.2s;
}

.link-group a:hover {
  color: var(--accent-cyan);
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  padding-top: 24px;
  text-align: center;
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* ==========================================================================
   RESPONSIVE DESIGN
   ========================================================================== */
@media (max-width: 960px) {
  .hero-title { font-size: 2.8rem; }
  .pillars-grid, .faq-grid { grid-template-columns: 1fr; }
  .window-body { grid-template-columns: 1fr; height: auto; }
  .app-sidebar { display: none; }
  .footer-content { flex-direction: column; }
}

@media (max-width: 640px) {
  .hero-title { font-size: 2.2rem; }
  .hero-cta-group { flex-direction: column; width: 100%; }
  .btn-lg { width: 100%; text-align: center; }
  .nav-links { display: none; }
}