/* Axel eLearning - Atmosphere & Effects */

:root {
  /* Color Palette */
  --color-bg-deep: #0a0a0b;
  --color-bg-surface: #111113;
  --color-bg-elevated: #1a1a1d;
  --color-bg-glass: rgba(26, 26, 29, 0.7);

  --color-accent: #e67e22;
  --color-accent-light: #f39c12;
  --color-accent-glow: rgba(230, 126, 34, 0.3);
  --color-accent-subtle: rgba(230, 126, 34, 0.1);

  --color-copper: #b87333;
  --color-copper-light: #cd7f32;

  --color-text-primary: #f5f5f5;
  --color-text-secondary: #a0a0a5;
  --color-text-muted: #6b6b70;

  --color-border: rgba(255, 255, 255, 0.08);
  --color-border-accent: rgba(230, 126, 34, 0.3);

  /* Spacing */
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 1.5rem;
  --space-lg: 2.5rem;
  --space-xl: 4rem;
  --space-2xl: 6rem;
  --space-3xl: 10rem;

  /* Typography */
  --font-display: 'Bebas Neue', sans-serif;
  --font-body: 'Outfit', sans-serif;

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
  --transition-slow: 400ms ease;
}

/* Base Styles */
* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  background-color: var(--color-bg-deep);
  color: var(--color-text-primary);
  line-height: 1.6;
  overflow-x: hidden;
}

/* Noise Texture Overlay */
.noise-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 9999;
  opacity: 0.03;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)'/%3E%3C/svg%3E");
}

/* Vignette Effect */
.vignette {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 9998;
  background: radial-gradient(ellipse at center, transparent 0%, transparent 50%, rgba(0, 0, 0, 0.4) 100%);
}

/* Background Gradient Layers */
.bg-gradient-primary {
  background:
    radial-gradient(ellipse 80% 50% at 50% -20%, rgba(230, 126, 34, 0.15) 0%, transparent 50%),
    radial-gradient(ellipse 60% 40% at 100% 0%, rgba(184, 115, 51, 0.1) 0%, transparent 40%),
    linear-gradient(180deg, var(--color-bg-deep) 0%, var(--color-bg-surface) 100%);
}

.bg-gradient-hero {
  background:
    radial-gradient(ellipse 100% 80% at 20% 100%, rgba(230, 126, 34, 0.08) 0%, transparent 50%),
    radial-gradient(ellipse 80% 60% at 80% 20%, rgba(230, 126, 34, 0.12) 0%, transparent 40%),
    linear-gradient(180deg, var(--color-bg-deep) 0%, var(--color-bg-surface) 100%);
}

.bg-gradient-section {
  background:
    radial-gradient(ellipse 60% 40% at 0% 50%, rgba(230, 126, 34, 0.06) 0%, transparent 50%),
    var(--color-bg-surface);
}

.bg-gradient-dark {
  background:
    radial-gradient(ellipse 80% 60% at 100% 100%, rgba(230, 126, 34, 0.05) 0%, transparent 50%),
    var(--color-bg-deep);
}

/* Orb Glow Effects */
.orb-glow {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  pointer-events: none;
}

.orb-glow-orange {
  background: var(--color-accent-glow);
}

.orb-glow-copper {
  background: rgba(184, 115, 51, 0.2);
}

/* Glass Panel Effect */
.glass-panel {
  background: var(--color-bg-glass);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--color-border);
  border-radius: 16px;
}

.glass-panel-accent {
  background: linear-gradient(135deg, rgba(230, 126, 34, 0.08) 0%, var(--color-bg-glass) 100%);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--color-border-accent);
  border-radius: 16px;
}

/* Glow Border Effect */
.glow-border {
  position: relative;
}

.glow-border::before {
  content: '';
  position: absolute;
  inset: -1px;
  border-radius: inherit;
  padding: 1px;
  background: linear-gradient(135deg, var(--color-accent) 0%, transparent 50%, var(--color-copper) 100%);
  -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  opacity: 0.5;
  transition: opacity var(--transition-base);
}

.glow-border:hover::before {
  opacity: 1;
}

/* Accent Underline */
.accent-underline {
  position: relative;
  display: inline-block;
}

.accent-underline::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, var(--color-accent) 0%, var(--color-copper) 100%);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition-base);
}

.accent-underline:hover::after {
  transform: scaleX(1);
}

/* Button Styles */
.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.875rem 1.75rem;
  background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-copper) 100%);
  color: var(--color-bg-deep);
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 0.95rem;
  text-decoration: none;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  transition: all var(--transition-base);
  box-shadow: 0 4px 20px var(--color-accent-glow);
  min-height: 48px;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px var(--color-accent-glow);
}

.btn-primary:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.875rem 1.75rem;
  background: transparent;
  color: var(--color-text-primary);
  font-family: var(--font-body);
  font-weight: 500;
  font-size: 0.95rem;
  text-decoration: none;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  cursor: pointer;
  transition: all var(--transition-base);
  min-height: 48px;
}

.btn-secondary:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
  background: var(--color-accent-subtle);
}

.btn-secondary:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

/* Filter Chips */
.filter-chip {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.5rem 1rem;
  background: transparent;
  color: var(--color-text-secondary);
  font-family: var(--font-body);
  font-weight: 500;
  font-size: 0.8rem;
  text-decoration: none;
  border: 1px solid var(--color-border);
  border-radius: 100px;
  cursor: pointer;
  transition: all var(--transition-base);
  min-height: 36px;
}

.filter-chip:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
  background: var(--color-accent-subtle);
}

.filter-chip.active {
  background: var(--color-accent);
  border-color: var(--color-accent);
  color: var(--color-bg-deep);
  font-weight: 600;
}

.filter-chip:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

/* Section Title Styles */
.section-label {
  font-family: var(--font-body);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: 1rem;
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 400;
  letter-spacing: 0.02em;
  line-height: 1.1;
  color: var(--color-text-primary);
  margin-bottom: 1.5rem;
}

/* Card Hover Effects */
.card-hover {
  transition: all var(--transition-base);
}

.card-hover:hover {
  transform: translateY(-4px);
  border-color: var(--color-border-accent);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3), 0 0 40px var(--color-accent-subtle);
}

/* Staggered Animation */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes slideInLeft {
  from {
    opacity: 0;
    transform: translateX(-30px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes scaleIn {
  from {
    opacity: 0;
    transform: scale(0.95);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

@keyframes glowPulse {
  0%, 100% {
    box-shadow: 0 0 20px var(--color-accent-glow);
  }
  50% {
    box-shadow: 0 0 40px var(--color-accent-glow), 0 0 60px rgba(230, 126, 34, 0.1);
  }
}

.animate-fade-in-up {
  animation: fadeInUp 0.6s ease forwards;
}

.animate-fade-in {
  animation: fadeIn 0.6s ease forwards;
}

.animate-slide-in-left {
  animation: slideInLeft 0.6s ease forwards;
}

.animate-scale-in {
  animation: scaleIn 0.5s ease forwards;
}

.animate-glow-pulse {
  animation: glowPulse 3s ease-in-out infinite;
}

/* Animation Delays */
.delay-100 { animation-delay: 100ms; }
.delay-200 { animation-delay: 200ms; }
.delay-300 { animation-delay: 300ms; }
.delay-400 { animation-delay: 400ms; }
.delay-500 { animation-delay: 500ms; }
.delay-600 { animation-delay: 600ms; }
.delay-700 { animation-delay: 700ms; }
.delay-800 { animation-delay: 800ms; }

/* Initially hidden for animation */
.animate-on-load {
  opacity: 0;
}

/* Grid Pattern Background */
.bg-grid-pattern {
  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;
}

/* Diagonal Accent Line */
.diagonal-accent {
  position: relative;
  overflow: hidden;
}

.diagonal-accent::before {
  content: '';
  position: absolute;
  top: 0;
  left: -50%;
  width: 200%;
  height: 1px;
  background: linear-gradient(90deg, transparent 0%, var(--color-accent) 50%, transparent 100%);
  transform: rotate(-5deg);
}

/* Focus Styles */
*:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

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

/* Scrollbar */
::-webkit-scrollbar {
  width: 8px;
}

::-webkit-scrollbar-track {
  background: var(--color-bg-deep);
}

::-webkit-scrollbar-thumb {
  background: var(--color-bg-elevated);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--color-text-muted);
}

/* Form Styles */
.form-input {
  width: 100%;
  padding: 0.875rem 1rem;
  background: var(--color-bg-elevated);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  color: var(--color-text-primary);
  font-family: var(--font-body);
  font-size: 1rem;
  transition: all var(--transition-base);
  min-height: 48px;
}

.form-input:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px var(--color-accent-subtle);
}

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

.form-label {
  display: block;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text-secondary);
  margin-bottom: 0.5rem;
}

/* Checkbox Custom Style */
.checkbox-custom {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  cursor: pointer;
  min-height: 48px;
  padding: 0.5rem 0;
}

.checkbox-custom input[type="checkbox"] {
  width: 20px;
  height: 20px;
  margin-top: 2px;
  accent-color: var(--color-accent);
  cursor: pointer;
  flex-shrink: 0;
}

/* Stats Card */
.stat-number {
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 6vw, 4rem);
  letter-spacing: 0.02em;
  line-height: 1;
  color: var(--color-accent);
}

.stat-label {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* Responsive Typography */
.hero-title {
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 8vw, 5.5rem);
  font-weight: 400;
  letter-spacing: 0.02em;
  line-height: 1;
}

.hero-subtitle {
  font-size: clamp(1.125rem, 2vw, 1.5rem);
  color: var(--color-text-secondary);
  font-weight: 300;
}

/* Mobile Menu */
.mobile-menu {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100vh;
  background: var(--color-bg-deep);
  z-index: 100;
  transform: translateX(-100%);
  transition: transform var(--transition-slow);
  padding: 6rem 2rem 2rem;
}

.mobile-menu.is-open {
  transform: translateX(0);
}

.mobile-menu a {
  display: block;
  padding: 1rem 0;
  font-size: 1.5rem;
  font-family: var(--font-display);
  letter-spacing: 0.05em;
  color: var(--color-text-primary);
  text-decoration: none;
  border-bottom: 1px solid var(--color-border);
  transition: color var(--transition-base);
}

.mobile-menu a:hover {
  color: var(--color-accent);
}

/* Hamburger Button */
.hamburger {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 48px;
  height: 48px;
  padding: 12px;
  background: transparent;
  border: none;
  cursor: pointer;
  z-index: 101;
}

.hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-text-primary);
  transition: all var(--transition-base);
}

.hamburger.is-active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.hamburger.is-active span:nth-child(2) {
  opacity: 0;
}

.hamburger.is-active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* FAQ Accordion */
.faq-item {
  border-bottom: 1px solid var(--color-border);
}

.faq-question {
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.25rem 0;
  background: transparent;
  border: none;
  color: var(--color-text-primary);
  font-family: var(--font-body);
  font-size: 1rem;
  font-weight: 500;
  text-align: left;
  cursor: pointer;
  min-height: 48px;
  transition: color var(--transition-base);
}

.faq-question:hover {
  color: var(--color-accent);
}

.faq-icon {
  width: 24px;
  height: 24px;
  transition: transform var(--transition-base);
  flex-shrink: 0;
}

.faq-item.is-open .faq-icon {
  transform: rotate(180deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition-slow);
}

.faq-item.is-open .faq-answer {
  max-height: 500px;
}

.faq-answer-inner {
  padding-bottom: 1.25rem;
  color: var(--color-text-secondary);
  line-height: 1.7;
}

/* Project Card */
.project-card {
  position: relative;
  overflow: hidden;
}

.project-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 100%;
  background: linear-gradient(180deg, var(--color-accent) 0%, var(--color-copper) 100%);
  opacity: 0;
  transition: opacity var(--transition-base);
}

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

/* Dashboard Mock */
.dashboard-mock {
  position: relative;
}

.dashboard-bar {
  height: 8px;
  border-radius: 4px;
  background: linear-gradient(90deg, var(--color-accent) 0%, var(--color-copper) 100%);
}

.dashboard-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--color-accent);
  box-shadow: 0 0 10px var(--color-accent-glow);
}

/* Skip Link */
.skip-link {
  position: absolute;
  top: -100%;
  left: 50%;
  transform: translateX(-50%);
  padding: 1rem 2rem;
  background: var(--color-accent);
  color: var(--color-bg-deep);
  font-weight: 600;
  text-decoration: none;
  border-radius: 0 0 8px 8px;
  z-index: 9999;
  transition: top var(--transition-base);
}

.skip-link:focus {
  top: 0;
}