/* ============================================
   Backspace.me — Global Styles (App-Matched)
   ============================================ */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&display=swap');

:root {
  /* Backgrounds — matches app exactly */
  --bg-primary: #1A1A1A;
  --bg-secondary: #242424;
  --bg-card: #242424;
  --bg-card-hover: #2A2A2A;
  --bg-input: #2A2A2A;

  /* Borders */
  --border: #2E2E2E;
  --border-light: #3A3A3A;
  --border-glow: rgba(245, 158, 11, 0.1);

  /* Accent — amber */
  --accent: #F59E0B;
  --accent-dim: rgba(245, 158, 11, 0.12);
  --accent-hover: #FBBF24;
  --accent-soft: rgba(245, 158, 11, 0.08);

  /* Text */
  --text-primary: #ECECEC;
  --text-secondary: #A0A0A0;
  --text-dim: #666666;

  /* Status Colors */
  --green: #10B981;
  --teal: #0D9488;
  --red: #EF4444;
  --blue: #93C5FD;
  --purple: #A78BFA;
  --coral: #EF8354;

  /* Layout */
  --radius: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --shadow: 0 4px 24px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.4);
  --max-width: 1200px;
  --nav-height: 64px;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

a { color: var(--accent); text-decoration: none; transition: color 0.15s; }
a:hover { color: var(--accent-hover); }

img { max-width: 100%; height: auto; }

::selection {
  background: rgba(245, 158, 11, 0.25);
  color: var(--text-primary);
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

/* ============================================
   Navigation
   ============================================ */

.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  background: rgba(26, 26, 26, 0.8);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
  z-index: 1000;
  transition: all 0.3s;
}

.nav.scrolled {
  background: rgba(26, 26, 26, 0.95);
  box-shadow: 0 1px 12px rgba(0, 0, 0, 0.2);
}

.nav-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  display: flex;
  flex-direction: column;
  text-decoration: none;
  line-height: 1;
}
.logo-text {
  font-size: 18px;
  font-weight: 700;
  letter-spacing: 0.5px;
  white-space: nowrap;
}
.nav-logo .logo-back { color: var(--text-primary) !important; }
.nav-logo .logo-space { color: var(--accent) !important; }
.nav-logo .logo-dot { color: var(--text-dim) !important; font-weight: 400; }
.nav-logo .logo-cursor { color: var(--accent) !important; animation: blink 0.8s step-end infinite; font-weight: 400; }
.nav-logo .logo-arrow { display: block; width: 100%; height: 6px; margin-top: 2px; }

@keyframes blink { 50% { opacity: 0; } }

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

.nav-links a {
  color: var(--text-secondary);
  font-size: 13px;
  font-weight: 500;
  transition: color 0.15s;
  text-decoration: none;
  letter-spacing: 0.01em;
}

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

.nav-cta {
  display: flex;
  align-items: center;
  gap: 10px;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 20px;
  border-radius: var(--radius);
  font-size: 13px;
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: all 0.15s ease;
  text-decoration: none;
  letter-spacing: 0.01em;
}

.btn-primary {
  background: var(--accent);
  color: #000;
}
.btn-primary:hover {
  background: var(--accent-hover);
  color: #000;
  transform: translateY(-1px);
  box-shadow: 0 4px 16px rgba(245, 158, 11, 0.3);
}

.btn-secondary {
  background: transparent;
  color: var(--text-primary);
  border: 1px solid var(--border-light);
}
.btn-secondary:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.btn-ghost {
  background: transparent;
  color: var(--text-secondary);
  padding: 8px 16px;
}
.btn-ghost:hover { color: var(--text-primary); }

.btn-sm {
  padding: 6px 14px;
  font-size: 11px;
}

/* Mobile menu */
.nav-mobile-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--text-primary);
  cursor: pointer;
  padding: 8px;
}

.nav-mobile-toggle svg { width: 24px; height: 24px; }

@media (max-width: 768px) {
  .nav-links { display: none; }
  .nav-cta { display: none; }
  .nav-mobile-toggle { display: block; }

  .nav-links.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: var(--nav-height);
    left: 0;
    right: 0;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border);
    padding: 16px 24px;
    gap: 16px;
  }

  .nav-cta.open {
    display: flex;
    position: absolute;
    top: calc(var(--nav-height) + 200px);
    left: 0;
    right: 0;
    background: var(--bg-secondary);
    padding: 16px 24px;
    border-bottom: 1px solid var(--border);
  }
}

/* ============================================
   Sections
   ============================================ */

section {
  padding: 100px 0;
}

.section-label {
  display: inline-block;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 12px;
}

.section-title {
  font-size: 36px;
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 16px;
  letter-spacing: -0.5px;
}

.section-subtitle {
  font-size: 15px;
  color: var(--text-secondary);
  max-width: 560px;
  line-height: 1.7;
}

.text-center { text-align: center; }
.mx-auto { margin-left: auto; margin-right: auto; }

/* ============================================
   Cards
   ============================================ */

.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px;
  transition: all 0.15s ease;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(245, 158, 11, 0.15), transparent);
  opacity: 0;
  transition: opacity 0.15s;
}

.card:hover {
  border-color: var(--border-light);
  background: var(--bg-card-hover);
  transform: translateY(-2px);
}

.card:hover::before { opacity: 1; }

.card-icon {
  width: 48px;
  height: 48px;
  border-radius: 10px;
  background: var(--accent-dim);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  margin: 0 auto 16px;
}

.card-title {
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 8px;
  letter-spacing: 0.01em;
}

.card-text {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ============================================
   Footer
   ============================================ */

.footer {
  border-top: 1px solid var(--border);
  padding: 60px 0 40px;
  background: var(--bg-secondary);
}

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

.footer-brand p {
  color: var(--text-secondary);
  font-size: 13px;
  margin-top: 12px;
  max-width: 280px;
  line-height: 1.7;
}

.footer-col h4 {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 1.2px;
  text-transform: uppercase;
  color: var(--text-dim);
  margin-bottom: 16px;
}

.footer-col a {
  display: block;
  color: var(--text-secondary);
  font-size: 13px;
  padding: 4px 0;
  transition: color 0.15s;
}

.footer-col a:hover { color: var(--text-primary); }

.footer-bottom {
  border-top: 1px solid var(--border);
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 12px;
  color: var(--text-dim);
}

@media (max-width: 768px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }
  .footer-bottom {
    flex-direction: column;
    gap: 12px;
    text-align: center;
  }
}

/* ============================================
   Animations
   ============================================ */

.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

.fade-in-delay-1 { transition-delay: 0.1s; }
.fade-in-delay-2 { transition-delay: 0.2s; }
.fade-in-delay-3 { transition-delay: 0.3s; }
.fade-in-delay-4 { transition-delay: 0.4s; }

@keyframes pulse-glow {
  0%, 100% { box-shadow: 0 0 0 0 rgba(245, 158, 11, 0.4); }
  50% { box-shadow: 0 0 20px 4px rgba(245, 158, 11, 0.15); }
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-8px); }
}

@keyframes slide-up {
  from { opacity: 0; transform: translateY(12px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes glow-border {
  0%, 100% { border-color: var(--border); }
  50% { border-color: rgba(245, 158, 11, 0.2); }
}

/* ============================================
   Custom Scrollbar
   ============================================ */

::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border-light); border-radius: 99px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-dim); }

/* ============================================
   Utility
   ============================================ */

.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.grid-6 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }

@media (max-width: 768px) {
  .grid-2, .grid-3, .grid-6 { grid-template-columns: 1fr; }
  .section-title { font-size: 28px; }
  section { padding: 60px 0; }
}

@media (min-width: 768px) and (max-width: 1024px) {
  .grid-6 { grid-template-columns: repeat(2, 1fr); }
}