/* ===== OpenRobot Custom Styles ===== */

/* CSS Variables */
:root {
  --bg-primary: #0a0a0a;
  --bg-secondary: #111111;
  --bg-card: #1a1a1a;
  --bg-card-hover: #222222;
  --accent: #00d4ff;
  --accent-dark: #00a8cc;
  --accent-glow: rgba(0, 212, 255, 0.15);
  --text-primary: #f0f0f0;
  --text-secondary: #a0a0a0;
  --text-muted: #666666;
  --border: #2a2a2a;
}

/* Base */
html {
  scroll-behavior: smooth;
}

body {
  background-color: var(--bg-primary);
  color: var(--text-primary);
  font-family: 'Inter', sans-serif;
  overflow-x: hidden;
}

/* Selection */
::selection {
  background-color: var(--accent);
  color: var(--bg-primary);
}

/* Scrollbar */
::-webkit-scrollbar {
  width: 8px;
}
::-webkit-scrollbar-track {
  background: var(--bg-primary);
}
::-webkit-scrollbar-thumb {
  background: #333;
  border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
  background: #444;
}

/* Navigation */
.nav-glass {
  background: rgba(10, 10, 10, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
}

.nav-link {
  position: relative;
  color: var(--text-secondary);
  transition: color 0.3s ease;
}

.nav-link:hover,
.nav-link.active {
  color: var(--accent);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--accent);
  transition: width 0.3s ease;
}

.nav-link:hover::after,
.nav-link.active::after {
  width: 100%;
}

/* Mobile menu */
.mobile-menu {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease;
}

.mobile-menu.open {
  max-height: 300px;
}

/* Hero */
.hero-gradient {
  background: radial-gradient(ellipse at 50% 0%, rgba(0, 212, 255, 0.08) 0%, transparent 60%);
}

.hero-headline {
  background: linear-gradient(135deg, #ffffff 0%, var(--accent) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* Glow effects */
.glow-line {
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
  opacity: 0.4;
}

/* Cards */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  transition: all 0.3s ease;
}

.card:hover {
  background: var(--bg-card-hover);
  border-color: rgba(0, 212, 255, 0.3);
  transform: translateY(-4px);
  box-shadow: 0 8px 30px rgba(0, 212, 255, 0.08);
}

/* Buttons */
.btn-primary {
  background: var(--accent);
  color: var(--bg-primary);
  font-weight: 600;
  padding: 12px 32px;
  border-radius: 8px;
  transition: all 0.3s ease;
  display: inline-block;
}

.btn-primary:hover {
  background: var(--accent-dark);
  box-shadow: 0 4px 20px rgba(0, 212, 255, 0.3);
  transform: translateY(-2px);
}

.btn-outline {
  border: 1px solid var(--accent);
  color: var(--accent);
  font-weight: 600;
  padding: 12px 32px;
  border-radius: 8px;
  transition: all 0.3s ease;
  display: inline-block;
}

.btn-outline:hover {
  background: var(--accent);
  color: var(--bg-primary);
  box-shadow: 0 4px 20px rgba(0, 212, 255, 0.3);
  transform: translateY(-2px);
}

/* Accent icon circle */
.icon-circle {
  width: 56px;
  height: 56px;
  border-radius: 12px;
  background: var(--accent-glow);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
  flex-shrink: 0;
}

/* Section styling */
.section-label {
  color: var(--accent);
  font-size: 0.875rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

/* Form inputs */
.form-input {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 12px 16px;
  color: var(--text-primary);
  width: 100%;
  transition: border-color 0.3s ease;
  outline: none;
}

.form-input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(0, 212, 255, 0.1);
}

.form-input::placeholder {
  color: var(--text-muted);
}

/* Footer */
footer a {
  transition: color 0.3s ease;
}

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

/* Fade-in animation */
.fade-in {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

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

/* Stagger children animation */
.stagger-children .fade-in:nth-child(1) { transition-delay: 0s; }
.stagger-children .fade-in:nth-child(2) { transition-delay: 0.1s; }
.stagger-children .fade-in:nth-child(3) { transition-delay: 0.2s; }
.stagger-children .fade-in:nth-child(4) { transition-delay: 0.3s; }

/* Pulse dot */
.pulse-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent);
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; box-shadow: 0 0 0 0 rgba(0, 212, 255, 0.4); }
  50% { opacity: 0.8; box-shadow: 0 0 0 8px rgba(0, 212, 255, 0); }
}

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

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

/* Grid pattern background */
.grid-bg {
  background-image:
    linear-gradient(rgba(255,255,255,0.02) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.02) 1px, transparent 1px);
  background-size: 60px 60px;
}

/* Responsive adjustments */
@media (max-width: 768px) {
  .hero-headline {
    font-size: 2.5rem;
    line-height: 1.1;
  }
}