/* ==========================================================================
   SAHIKOSQL - Pure Black & White Monochrome Glass Design System
   Exact App Color Palette: #000000 Pitch Black & #FFFFFF Crisp White
   ========================================================================== */

:root {
  --bg-pitch: #000000;
  --bg-card: #0d0d0d;
  --bg-card-hover: #171717;
  --bg-terminal: #050505;
  --border-glass: rgba(255, 255, 255, 0.18);
  --border-dark: #222222;
  --text-primary: #ffffff;
  --text-muted: #a1a1aa;
  --text-dim: #71717a;
  --font-sans: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', Consolas, monospace;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-full: 9999px;
  --transition: all 0.25s ease;
}

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

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

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

/* Subtle Pure White Textured Grid */
body::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background-image: 
    linear-gradient(rgba(255, 255, 255, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.04) 1px, transparent 1px);
  background-size: 32px 32px;
  pointer-events: none;
  z-index: 0;
}

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

/* Helpers */
.font-mono { font-family: var(--font-mono); }
.text-white { color: #ffffff; }
.text-muted { color: var(--text-muted); }
.text-gradient {
  background: linear-gradient(180deg, #ffffff 40%, #a1a1aa 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* Navigation Bar */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 100;
  background: rgba(0, 0, 0, 0.92);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-glass);
}

.navbar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 14px;
  text-decoration: none;
  color: var(--text-primary);
}

.brand-app-icon {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
  display: block;
}

.brand-name {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 1.25rem;
  letter-spacing: -0.5px;
  color: #ffffff;
}

.brand-version {
  font-size: 0.72rem;
  background: #171717;
  color: #ffffff;
  border: 1px solid var(--border-glass);
  padding: 4px 12px;
  border-radius: var(--radius-full);
  font-family: var(--font-mono);
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 32px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
  list-style: none;
}

.nav-links a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 500;
  transition: var(--transition);
}

.nav-links a:hover {
  color: #ffffff;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 16px;
}

/* Buttons (Strict Black & White) */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 12px 24px;
  font-size: 0.92rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  text-decoration: none;
  cursor: pointer;
  transition: var(--transition);
  border: 1px solid transparent;
  outline: none;
  white-space: nowrap;
}

.btn-sm {
  padding: 8px 16px;
  font-size: 0.85rem;
}

.btn-white {
  background: #ffffff;
  color: #000000;
  font-weight: 700;
  border-color: #ffffff;
}

.btn-white:hover {
  background: #e4e4e7;
  transform: translateY(-2px);
  box-shadow: 0 0 25px rgba(255, 255, 255, 0.3);
}

.btn-glass {
  background: #0d0d0d;
  color: #ffffff;
  border: 1px solid var(--border-glass);
}

.btn-glass:hover {
  background: #171717;
  border-color: #ffffff;
  transform: translateY(-2px);
}

.mobile-toggle {
  display: none;
  background: #0d0d0d;
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-sm);
  color: #ffffff;
  width: 40px;
  height: 40px;
  align-items: center;
  justify-content: center;
  cursor: pointer;
}

/* Hero Section */
.hero {
  padding: 190px 0 120px;
  position: relative;
}

.hero-container {
  max-width: 860px;
  margin: 0 auto;
  text-align: center;
}

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

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  background: #0d0d0d;
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-full);
  font-size: 0.82rem;
  color: #ffffff;
  font-family: var(--font-mono);
  margin-bottom: 28px;
}

.hero-title {
  font-size: 3.6rem;
  line-height: 1.12;
  font-weight: 800;
  letter-spacing: -1.8px;
  margin-bottom: 28px;
  color: #ffffff;
}

.hero-subtitle {
  font-size: 1.18rem;
  color: var(--text-muted);
  margin-bottom: 72px;
  line-height: 1.7;
  max-width: 740px;
}

.hero-ctas {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 84px;
}

.hero-specs {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  padding-top: 56px;
  border-top: 1px solid var(--border-glass);
  width: 100%;
  max-width: 720px;
}

.spec-item {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.spec-value {
  font-family: var(--font-mono);
  font-size: 1.15rem;
  font-weight: 700;
  color: #ffffff;
}

.spec-label {
  font-size: 0.75rem;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

/* Hero Terminal HUD Stream Box */
.hero-code-card {
  background: #050505;
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.95);
}

.hero-card-header {
  background: #111111;
  padding: 14px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--border-glass);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: #ffffff;
}

.hero-card-body {
  padding: 20px;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  line-height: 1.7;
  color: var(--text-muted);
}

/* Section Common */
.section {
  padding: 90px 0;
  position: relative;
}

.section-header {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 56px;
}

.section-tag {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: #ffffff;
  text-transform: uppercase;
  letter-spacing: 2px;
  margin-bottom: 12px;
  display: block;
}

.section-title {
  font-size: 2.4rem;
  font-weight: 800;
  letter-spacing: -1px;
  margin-bottom: 16px;
  color: #ffffff;
}

.section-desc {
  font-size: 1.05rem;
  color: var(--text-muted);
}

/* Glass Card */
.glass-card {
  background: var(--bg-card);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-lg);
  padding: 28px;
  transition: var(--transition);
}

.glass-card:hover {
  background: var(--bg-card-hover);
  border-color: #ffffff;
  transform: translateY(-4px);
}

/* Features Grid */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 24px;
}

.feature-tag-box {
  display: inline-flex;
  align-items: center;
  padding: 4px 10px;
  background: #1f1f1f;
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: #ffffff;
  margin-bottom: 16px;
}

.feature-title {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 10px;
  color: #ffffff;
}

.feature-desc {
  color: var(--text-muted);
  font-size: 0.92rem;
  line-height: 1.6;
}

/* Live Simulator */
.simulator-wrapper {
  background: #000000;
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.95);
}

.window-header {
  background: #111111;
  padding: 14px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--border-glass);
}

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

.dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: #333333;
}

.window-title {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: #ffffff;
}

.simulator-body {
  padding: 24px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

.sim-controls {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.input-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.input-group label {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--text-muted);
}

.sim-input {
  background: #080808;
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-md);
  padding: 12px 16px;
  color: #ffffff;
  font-family: var(--font-mono);
  font-size: 0.88rem;
  outline: none;
  transition: var(--transition);
  width: 100%;
}

.sim-input:focus {
  border-color: #ffffff;
}

.sim-options {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.sim-chip {
  padding: 6px 12px;
  border-radius: var(--radius-full);
  background: #111111;
  border: 1px solid var(--border-glass);
  font-size: 0.78rem;
  font-family: var(--font-mono);
  color: var(--text-muted);
  cursor: pointer;
  transition: var(--transition);
}

.sim-chip.active {
  background: #ffffff;
  color: #000000;
  font-weight: 700;
  border-color: #ffffff;
}

.sim-terminal {
  background: var(--bg-terminal);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-md);
  padding: 16px;
  height: 300px;
  overflow-y: auto;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  line-height: 1.6;
  color: #ffffff;
  -webkit-overflow-scrolling: touch;
}

.log-line {
  margin-bottom: 6px;
  word-break: break-all;
}

.log-time { color: var(--text-dim); margin-right: 8px; }
.log-info { color: #a1a1aa; }
.log-vuln { color: #ffffff; font-weight: 700; background: #262626; padding: 2px 6px; border-radius: 4px; border: 1px solid rgba(255,255,255,0.2); }
.log-success { color: #ffffff; font-weight: 600; }
.log-marker { color: #d4d4d8; }

.matrix-preview {
  margin-top: 20px;
  background: #050505;
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-md);
  padding: 16px;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.matrix-table {
  width: 100%;
  border-collapse: collapse;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  white-space: nowrap;
}

.matrix-table th {
  background: #1a1a1a;
  color: #ffffff;
  text-align: left;
  padding: 10px 14px;
  border: 1px solid var(--border-glass);
}

.matrix-table td {
  padding: 10px 14px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  color: var(--text-muted);
}

.matrix-table tr:nth-child(even) {
  background: #111111;
}

/* Architecture Section */
.arch-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: center;
}

.code-box {
  background: #050505;
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-md);
  padding: 20px;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: #a1a1aa;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.code-box .kw { color: #ffffff; font-weight: 700; }
.code-box .str { color: #d4d4d8; }
.code-box .fn { color: #ffffff; }
.code-box .cm { color: #52525b; font-style: italic; }

/* Database Grid Matrix */
.db-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 20px;
}

.db-card {
  background: var(--bg-card);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-md);
  padding: 24px;
  text-align: center;
  transition: var(--transition);
}

.db-card:hover {
  border-color: #ffffff;
  transform: translateY(-4px);
}

.db-tag {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: #ffffff;
  background: #1a1a1a;
  padding: 4px 10px;
  border-radius: var(--radius-full);
  display: inline-block;
  margin-bottom: 12px;
  border: 1px solid var(--border-glass);
}

.db-name {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 1.05rem;
  margin-bottom: 6px;
  color: #ffffff;
}

.db-status {
  font-size: 0.8rem;
  color: #ffffff;
  font-family: var(--font-mono);
}

/* Download Section Card */
.download-card {
  background: #090909;
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-lg);
  padding: 44px 28px;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.download-meta-table {
  max-width: 600px;
  margin: 28px auto;
  border-collapse: collapse;
  width: 100%;
  font-family: var(--font-mono);
  font-size: 0.82rem;
}

.download-meta-table td {
  padding: 10px 14px;
  border-bottom: 1px solid var(--border-glass);
  text-align: left;
}

.download-meta-table td:first-child {
  color: var(--text-dim);
  width: 40%;
}

.download-meta-table td:last-child {
  color: #ffffff;
  font-weight: 600;
}

/* FAQ Accordion */
.faq-grid {
  display: flex;
  flex-direction: column;
  gap: 16px;
  max-width: 800px;
  margin: 0 auto;
}

.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: var(--transition);
}

.faq-question {
  padding: 18px 22px;
  font-weight: 600;
  font-size: 1rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
  user-select: none;
  color: #ffffff;
}

.faq-answer {
  padding: 0 22px 18px;
  color: var(--text-muted);
  font-size: 0.92rem;
  display: none;
  line-height: 1.6;
}

.faq-item.active .faq-answer {
  display: block;
}

.faq-item.active {
  border-color: #ffffff;
  background: var(--bg-card-hover);
}

.faq-icon {
  font-family: var(--font-mono);
  font-size: 1.2rem;
  transition: var(--transition);
  color: #ffffff;
}

.faq-item.active .faq-icon {
  transform: rotate(45deg);
}

/* Toast */
.toast {
  position: fixed;
  bottom: 24px;
  right: 24px;
  background: #111111;
  border: 1px solid #ffffff;
  color: #ffffff;
  padding: 14px 20px;
  border-radius: var(--radius-md);
  font-family: var(--font-mono);
  font-size: 0.85rem;
  display: flex;
  align-items: center;
  gap: 10px;
  z-index: 1000;
  transform: translateY(100px);
  opacity: 0;
  transition: var(--transition);
  max-width: 90vw;
}

.toast.show {
  transform: translateY(0);
  opacity: 1;
}

/* Footer */
.footer {
  border-top: 1px solid var(--border-glass);
  padding: 60px 0 30px;
  background: #000000;
  color: var(--text-muted);
  font-size: 0.88rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}

.footer-bottom {
  text-align: center;
  padding-top: 30px;
  border-top: 1px solid var(--border-dark);
  font-size: 0.78rem;
  color: var(--text-dim);
}

/* Responsive Queries */
@media (max-width: 992px) {
  .hero-grid { grid-template-columns: 1fr; gap: 40px; }
  .arch-grid { grid-template-columns: 1fr; }
  .simulator-body { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
  .container { padding: 0 16px; }
  .navbar .container { height: 64px; }
  .mobile-toggle { display: flex; }
  .nav-menu {
    position: fixed;
    top: 64px;
    left: 0;
    width: 100%;
    height: calc(100vh - 64px);
    background: #000000;
    flex-direction: column;
    align-items: flex-start;
    padding: 32px 24px;
    gap: 32px;
    transform: translateX(-100%);
    transition: transform 0.3s ease;
    z-index: 99;
  }
  .nav-menu.active { transform: translateX(0); }
  .nav-links { flex-direction: column; align-items: flex-start; gap: 24px; width: 100%; }
  .nav-links a { font-size: 1.1rem; width: 100%; display: block; }
  .nav-actions { width: 100%; }
  .nav-actions .btn { width: 100%; }
  .hero { padding: 100px 0 50px; }
  .hero-title { font-size: 2.2rem; }
  .hero-ctas { flex-direction: column; width: 100%; }
  .hero-ctas .btn { width: 100%; }
  .hero-specs { grid-template-columns: repeat(2, 1fr); gap: 16px; }
  .section { padding: 60px 0; }
  .section-title { font-size: 1.8rem; }
  .download-card { padding: 28px 16px; }
  .download-meta-table td { display: block; width: 100% !important; padding: 6px 0; border-bottom: none; }
  .download-meta-table td:first-child { font-size: 0.75rem; color: #ffffff; margin-top: 8px; }
  .download-meta-table tr { border-bottom: 1px solid var(--border-glass); display: block; padding-bottom: 8px; }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
}

@media (max-width: 480px) {
  .hero-title { font-size: 1.85rem; }
  .sim-chip { width: 100%; text-align: center; }
}