/* ==========================================================================
   Suraksha Official Website - Premium Design System & Styles
   Engineered with Vanilla CSS, HSL Variables, and Fluid Responsiveness
   ========================================================================== */

:root {
  /* Color Tokens */
  --bg-base: #0B0B0E;
  --bg-surface: #121217;
  --bg-card: #181820;
  --bg-card-hover: #20202B;
  --bg-glass: rgba(18, 18, 23, 0.82);

  --border-subtle: rgba(255, 255, 255, 0.08);
  --border-medium: rgba(255, 255, 255, 0.14);
  --border-active: rgba(10, 132, 255, 0.4);

  --text-primary: #F8FAFC;
  --text-secondary: #94A3B8;
  --text-muted: #64748B;
  --text-inverted: #0A0A0C;

  --accent-blue: #0A84FF;
  --accent-blue-hover: #3399FF;
  --accent-blue-subtle: rgba(10, 132, 255, 0.12);

  --accent-green: #34C759;
  --accent-green-subtle: rgba(52, 199, 89, 0.12);

  --accent-red: #FF453A;
  --accent-red-subtle: rgba(255, 69, 58, 0.12);

  /* Typography */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI Variable Text', 'Segoe UI', system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', 'Cascadia Code', Consolas, monospace;

  /* Sizing & Spacing */
  --container-max: 1180px;
  --header-height: 72px;
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.45);
  --shadow-lg: 0 16px 40px rgba(0, 0, 0, 0.6);
  --shadow-glow: 0 0 30px rgba(10, 132, 255, 0.2);

  /* Transitions */
  --transition-fast: 0.15s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-smooth: 0.35s cubic-bezier(0.16, 1, 0.3, 1);
}

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

html {
  font-family: var(--font-sans);
  background-color: var(--bg-base);
  color: var(--text-primary);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  scroll-behavior: smooth;
  text-rendering: optimizeLegibility;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
  position: relative;
}

/* Background Ambient Lighting */
body::before {
  content: '';
  position: fixed;
  top: -20%;
  left: 50%;
  transform: translateX(-50%);
  width: 900px;
  height: 500px;
  background: radial-gradient(circle, rgba(10, 132, 255, 0.08) 0%, rgba(52, 199, 89, 0.03) 45%, transparent 70%);
  pointer-events: none;
  z-index: 0;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color var(--transition-fast);
}

img, svg {
  display: block;
  max-width: 100%;
}

button {
  font: inherit;
  background: none;
  border: none;
  cursor: pointer;
}

/* Container */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: 24px;
  padding-right: 24px;
  position: relative;
  z-index: 1;
}

/* ==========================================================================
   Navigation Bar
   ========================================================================== */
.site-header {
  position: sticky;
  top: 0;
  height: var(--header-height);
  display: flex;
  align-items: center;
  background-color: var(--bg-glass);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-subtle);
  z-index: 1000;
  transition: background-color var(--transition-normal), border-color var(--transition-normal);
}

.nav-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
}

.brand-link {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 700;
  font-size: 1.25rem;
  letter-spacing: -0.02em;
}

.brand-logo {
  width: 34px;
  height: 34px;
  border-radius: 8px;
}

.brand-badge {
  font-size: 0.72rem;
  font-weight: 600;
  padding: 2px 8px;
  border-radius: var(--radius-full);
  background: var(--accent-blue-subtle);
  color: var(--accent-blue);
  border: 1px solid rgba(10, 132, 255, 0.25);
  margin-left: 4px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
  list-style: none;
}

.nav-links a {
  font-size: 0.94rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: color var(--transition-fast);
}

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

.nav-actions {
  display: flex;
  align-items: center;
  gap: 14px;
}

.mobile-menu-btn {
  display: none;
  padding: 8px;
  color: var(--text-primary);
  border-radius: var(--radius-sm);
}

/* ==========================================================================
   Buttons & CTAs
   ========================================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 12px 24px;
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  transition: all var(--transition-normal);
  text-align: center;
  white-space: nowrap;
}

.btn-sm {
  padding: 8px 16px;
  font-size: 0.88rem;
  border-radius: var(--radius-sm);
}

.btn-lg {
  padding: 15px 30px;
  font-size: 1.05rem;
  border-radius: var(--radius-md);
}

.btn-primary {
  background-color: var(--accent-blue);
  color: #FFFFFF;
  box-shadow: 0 4px 16px rgba(10, 132, 255, 0.3);
}

.btn-primary:hover {
  background-color: var(--accent-blue-hover);
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(10, 132, 255, 0.45);
}

.btn-primary:active {
  transform: translateY(0);
}

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

.btn-secondary:hover {
  background-color: var(--bg-card-hover);
  border-color: rgba(255, 255, 255, 0.25);
  transform: translateY(-1px);
}

.btn-store {
  background-color: #1E1E26;
  color: var(--text-primary);
  border: 1px solid var(--border-medium);
  padding: 12px 24px;
  display: inline-flex;
  align-items: center;
  gap: 14px;
}

.btn-store:hover {
  background-color: #272732;
  border-color: rgba(255, 255, 255, 0.3);
  transform: translateY(-1px);
}

.btn-store .store-text {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  line-height: 1.2;
}

.btn-store .store-sub {
  font-size: 0.72rem;
  font-weight: 500;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.btn-store .store-main {
  font-size: 1.02rem;
  font-weight: 700;
}

/* ==========================================================================
   Hero Section
   ========================================================================== */
.hero-section {
  padding: 90px 0 60px;
  text-align: center;
  position: relative;
}

.hero-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  border-radius: var(--radius-full);
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-subtle);
  font-size: 0.86rem;
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: 28px;
}

.hero-pill .pill-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--accent-green);
}

.hero-title {
  font-size: clamp(2.4rem, 5.5vw, 4.2rem);
  font-weight: 800;
  letter-spacing: -0.035em;
  line-height: 1.12;
  max-width: 900px;
  margin: 0 auto 24px;
}

.hero-lead {
  font-size: clamp(1.05rem, 2vw, 1.25rem);
  color: var(--text-secondary);
  max-width: 680px;
  margin: 0 auto 40px;
  line-height: 1.6;
}

.hero-cta-group {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 18px;
  flex-wrap: wrap;
  margin-bottom: 20px;
}

.hero-meta {
  font-size: 0.85rem;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 20px;
  flex-wrap: wrap;
  margin-top: 14px;
}

.hero-meta span {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

/* ==========================================================================
   Interactive App Mockup
   ========================================================================== */
.mockup-wrapper {
  margin: 50px auto 0;
  max-width: 940px;
  padding: 10px;
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg);
  position: relative;
}

.app-window {
  background: var(--bg-surface);
  border-radius: var(--radius-lg);
  border: 1px solid rgba(255, 255, 255, 0.08);
  overflow: hidden;
  box-shadow: 0 25px 60px rgba(0, 0, 0, 0.7);
}

.app-titlebar {
  height: 48px;
  background: #17171C;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 18px;
}

.traffic-lights {
  display: flex;
  align-items: center;
  gap: 8px;
}

.traffic-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: #FF5F56;
}

.app-titlebar-title {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text-secondary);
}

.app-status-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 10px;
  border-radius: var(--radius-full);
  background: rgba(52, 199, 89, 0.14);
  color: var(--accent-green);
  font-size: 0.78rem;
  font-weight: 700;
  border: 1px solid rgba(52, 199, 89, 0.25);
}

.app-body {
  display: grid;
  grid-template-columns: 220px 1fr;
  min-height: 420px;
}

.app-sidebar {
  background: #15151A;
  border-right: 1px solid rgba(255, 255, 255, 0.06);
  padding: 18px 12px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.sidebar-tab {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  font-size: 0.9rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.sidebar-tab:hover {
  background: rgba(255, 255, 255, 0.04);
  color: var(--text-primary);
}

.sidebar-tab.active {
  background: var(--accent-blue);
  color: #FFFFFF;
  font-weight: 600;
}

.app-content {
  padding: 24px;
  background: #111115;
}

.app-content-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
}

.app-content-title {
  font-size: 1.15rem;
  font-weight: 700;
}

.mockup-app-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 24px;
}

.mockup-app-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 16px;
  background: #1A1A22;
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: var(--radius-sm);
}

.mockup-app-info {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.92rem;
  font-weight: 500;
}

.mockup-badge {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--accent-blue);
  background: var(--accent-blue-subtle);
  padding: 3px 8px;
  border-radius: var(--radius-sm);
}

.mockup-actions {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

/* ==========================================================================
   Feature Cards Grid
   ========================================================================== */
.section {
  padding: 80px 0;
}

.section-head {
  text-align: center;
  max-width: 680px;
  margin: 0 auto 56px;
}

.section-tag {
  font-size: 0.84rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent-blue);
  margin-bottom: 12px;
  display: block;
}

.section-title {
  font-size: clamp(1.8rem, 3.5vw, 2.6rem);
  font-weight: 800;
  letter-spacing: -0.025em;
  line-height: 1.2;
  margin-bottom: 16px;
}

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

.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 24px;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 32px;
  transition: all var(--transition-normal);
  display: flex;
  flex-direction: column;
}

.feature-card:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-medium);
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}

.feature-icon-wrap {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 22px;
  color: var(--accent-blue);
}

.feature-card-title {
  font-size: 1.22rem;
  font-weight: 700;
  margin-bottom: 12px;
  letter-spacing: -0.01em;
}

.feature-card-desc {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.6;
}

/* ==========================================================================
   Architecture & Security Pillars
   ========================================================================== */
.pillars-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 20px;
}

.pillar-box {
  background: #14141A;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 24px;
}

.pillar-stat {
  font-size: 2.2rem;
  font-weight: 800;
  color: var(--accent-green);
  letter-spacing: -0.03em;
  margin-bottom: 8px;
  line-height: 1;
}

.pillar-title {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 6px;
}

.pillar-desc {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

/* ==========================================================================
   Hotkeys Showcase
   ========================================================================== */
.hotkeys-banner {
  background: linear-gradient(180deg, #16161E 0%, #121217 100%);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xl);
  padding: 48px 36px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 36px;
  align-items: center;
}

.hotkey-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 20px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  margin-bottom: 12px;
}

.kbd-combo {
  display: flex;
  align-items: center;
  gap: 6px;
}

kbd {
  display: inline-block;
  padding: 5px 10px;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-primary);
  background: #252532;
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: 6px;
  box-shadow: 0 2px 0 rgba(0, 0, 0, 0.5);
}

/* ==========================================================================
   FAQ Section
   ========================================================================== */
.faq-wrap {
  max-width: 780px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

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

.faq-item.active {
  border-color: var(--border-medium);
}

.faq-question {
  width: 100%;
  padding: 20px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 1.05rem;
  font-weight: 600;
  text-align: left;
  color: var(--text-primary);
}

.faq-icon {
  transition: transform var(--transition-normal);
  color: var(--text-secondary);
}

.faq-item.active .faq-icon {
  transform: rotate(180deg);
  color: var(--accent-blue);
}

.faq-answer {
  display: none;
  padding: 0 24px 22px;
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.6;
}

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

/* ==========================================================================
   Legal Documents (Privacy Policy & Terms of Use)
   ========================================================================== */
.legal-page {
  padding: 60px 0 100px;
}

.legal-header {
  margin-bottom: 40px;
  border-bottom: 1px solid var(--border-subtle);
  padding-bottom: 24px;
}

.legal-title {
  font-size: clamp(2rem, 4vw, 2.8rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 12px;
}

.legal-meta {
  font-size: 0.92rem;
  color: var(--text-muted);
}

.legal-content {
  max-width: 860px;
  font-size: 1rem;
  color: #CBD5E1;
  line-height: 1.75;
}

.legal-content h2 {
  font-size: 1.45rem;
  font-weight: 700;
  color: var(--text-primary);
  margin: 36px 0 16px;
  letter-spacing: -0.01em;
}

.legal-content h3 {
  font-size: 1.18rem;
  font-weight: 600;
  color: var(--text-primary);
  margin: 24px 0 12px;
}

.legal-content p {
  margin-bottom: 18px;
}

.legal-content ul, .legal-content ol {
  margin-bottom: 20px;
  padding-left: 24px;
}

.legal-content li {
  margin-bottom: 8px;
}

.legal-highlight-box {
  background: rgba(52, 199, 89, 0.08);
  border: 1px solid rgba(52, 199, 89, 0.25);
  border-radius: var(--radius-md);
  padding: 20px 24px;
  margin: 24px 0;
  color: #E2E8F0;
}

.legal-highlight-box strong {
  color: var(--accent-green);
}

/* ==========================================================================
   Footer
   ========================================================================== */
.site-footer {
  margin-top: auto;
  background: #0E0E12;
  border-top: 1px solid var(--border-subtle);
  padding: 60px 0 30px;
  font-size: 0.92rem;
  color: var(--text-muted);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 48px;
}

.footer-brand p {
  margin-top: 14px;
  max-width: 320px;
  line-height: 1.5;
  color: var(--text-secondary);
}

.footer-col-title {
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--text-primary);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 18px;
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer-links a {
  color: var(--text-secondary);
}

.footer-links a:hover {
  color: var(--accent-blue);
}

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  padding-top: 24px;
  flex-wrap: wrap;
  gap: 16px;
}

/* ==========================================================================
   Responsive Breakpoints
   ========================================================================== */
@media (max-width: 960px) {
  .app-body {
    grid-template-columns: 1fr;
  }
  .app-sidebar {
    flex-direction: row;
    overflow-x: auto;
    border-right: none;
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  }
  .hotkeys-banner {
    grid-template-columns: 1fr;
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 768px) {
  .nav-links {
    display: none;
  }
  .mobile-menu-btn {
    display: block;
  }
  .nav-links.mobile-open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: var(--header-height);
    left: 0;
    width: 100%;
    background: var(--bg-surface);
    padding: 24px;
    border-bottom: 1px solid var(--border-medium);
    gap: 20px;
    box-shadow: var(--shadow-lg);
  }
  .hero-section {
    padding: 50px 0 40px;
  }
  .hero-cta-group {
    flex-direction: column;
    width: 100%;
  }
  .hero-cta-group .btn {
    width: 100%;
  }
  .footer-grid {
    grid-template-columns: 1fr;
  }
  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }
}