/* ============================================
   @unsertheanswer — Global Styles
   Dark Premium Theme + Blue Accent
   ============================================ */

@import url('https://fonts.googleapis.com/css2?family=Barlow:wght@700;800;900&family=Playfair+Display:ital@1&family=Manrope:wght@400;500;600;700;800&display=swap');

:root {
  /* Colors */
  --bg-primary: #0a0a0c;
  --bg-secondary: #0e0e12;
  --bg-card: rgba(42, 42, 42, 0.40);
  --bg-card-hover: rgba(55, 55, 62, 0.60);
  --bg-elevated: #1e1e2a;
  --border-color: rgba(66, 71, 84, 0.25);
  --border-hover: rgba(66, 71, 84, 0.40);

  --text-primary: #e5e2e1;
  --text-secondary: #8c909f;
  --text-muted: rgba(140, 144, 159, 0.5);

  --accent: #4d8eff;
  --accent-hover: #3b82f6;
  --accent-glow: rgba(173, 198, 255, 0.13);
  --accent-glow-strong: rgba(173, 198, 255, 0.3);
  --accent-light: #adc6ff;
  --accent-dark: #001a42;

  --success: #34d399;
  --warning: #f59e0b;

  /* Typography */
  --font-sans: 'Manrope', system-ui, sans-serif;
  --font-display: 'Barlow', sans-serif;
  --font-italic: 'Playfair Display', Georgia, serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

  /* Spacing */
  --section-padding: clamp(4rem, 8vw, 8rem);
  --container-max: 1200px;
  --container-narrow: 800px;

  /* Transitions */
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-in-out: cubic-bezier(0.65, 0, 0.35, 1);

  /* Radius */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 9999px;
}

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

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

a {
  color: inherit;
  text-decoration: none;
}

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

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

/* ============================================
   Layout
   ============================================ */

.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 clamp(1.25rem, 4vw, 2.5rem);
}

.container--narrow {
  max-width: var(--container-narrow);
}

.section {
  padding: var(--section-padding) 0;
  position: relative;
}

/* ============================================
   Typography
   ============================================ */

.display-xl {
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: -0.03em;
}

.display-lg {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4.5vw, 3.5rem);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.02em;
}

.display-md {
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 3vw, 2.25rem);
  font-weight: 600;
  line-height: 1.15;
  letter-spacing: -0.01em;
}

.text-lg {
  font-size: clamp(1.1rem, 1.5vw, 1.25rem);
  line-height: 1.6;
}

.text-md {
  font-size: 1rem;
  line-height: 1.6;
}

.text-sm {
  font-size: 0.875rem;
  line-height: 1.5;
}

.text-xs {
  font-size: 0.75rem;
  line-height: 1.4;
  letter-spacing: 0.02em;
}

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

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

.text-accent {
  color: var(--accent-light);
}

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

.label {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent-light);
  margin-bottom: 1rem;
}

.label::before {
  content: '';
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 12px var(--accent-glow-strong);
}

/* ============================================
   Buttons
   ============================================ */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.625rem;
  padding: 0.875rem 2rem;
  font-size: 0.9375rem;
  font-weight: 600;
  border-radius: var(--radius-full);
  transition: all 0.3s var(--ease-out);
  position: relative;
  overflow: hidden;
  white-space: nowrap;
}

.btn--primary {
  background: var(--accent);
  color: #fff;
  box-shadow: 0 0 20px var(--accent-glow), 0 4px 12px rgba(0, 0, 0, 0.3);
}

.btn--primary:hover {
  background: var(--accent-hover);
  box-shadow: 0 0 30px var(--accent-glow-strong), 0 8px 24px rgba(0, 0, 0, 0.4);
  transform: translateY(-2px);
}

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

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

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

.btn--ghost {
  color: var(--text-secondary);
  padding: 0.75rem 1.5rem;
}

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

.btn--lg {
  padding: 1.125rem 2.5rem;
  font-size: 1.0625rem;
}

.btn--full {
  width: 100%;
}

.btn .btn-icon {
  width: 18px;
  height: 18px;
  transition: transform 0.3s var(--ease-out);
}

.btn:hover .btn-icon {
  transform: translateX(3px);
}

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

.card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  transition: all 0.4s var(--ease-out);
}

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

.card--accent {
  border-color: rgba(59, 130, 246, 0.15);
  background: linear-gradient(135deg, var(--bg-card) 0%, rgba(59, 130, 246, 0.05) 100%);
}

.card--accent:hover {
  border-color: rgba(59, 130, 246, 0.3);
}

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

@keyframes fadeUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

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

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

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}

@keyframes pulse-glow {
  0%, 100% { box-shadow: 0 0 20px var(--accent-glow); }
  50% { box-shadow: 0 0 40px var(--accent-glow-strong); }
}

@keyframes gradient-shift {
  0% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}

.animate-on-scroll {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s var(--ease-out), transform 0.6s var(--ease-out);
}

.animate-on-scroll.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Stagger children */
.stagger-children .animate-on-scroll:nth-child(1) { transition-delay: 0.05s; }
.stagger-children .animate-on-scroll:nth-child(2) { transition-delay: 0.1s; }
.stagger-children .animate-on-scroll:nth-child(3) { transition-delay: 0.15s; }
.stagger-children .animate-on-scroll:nth-child(4) { transition-delay: 0.2s; }
.stagger-children .animate-on-scroll:nth-child(5) { transition-delay: 0.25s; }
.stagger-children .animate-on-scroll:nth-child(6) { transition-delay: 0.3s; }
.stagger-children .animate-on-scroll:nth-child(7) { transition-delay: 0.35s; }
.stagger-children .animate-on-scroll:nth-child(8) { transition-delay: 0.4s; }

/* ============================================
   Background Effects
   ============================================ */

.bg-grid {
  position: fixed;
  inset: 0;
  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;
  pointer-events: none;
  z-index: 0;
}

.bg-glow {
  position: fixed;
  width: 600px;
  height: 600px;
  border-radius: 50%;
  filter: blur(120px);
  opacity: 0.15;
  pointer-events: none;
  z-index: 0;
}

.bg-glow--blue {
  background: var(--accent);
  top: -200px;
  right: -200px;
}

.bg-glow--purple {
  background: #7c3aed;
  bottom: -200px;
  left: -200px;
  opacity: 0.08;
}

/* ============================================
   Forms
   ============================================ */

.input {
  width: 100%;
  padding: 0.875rem 1.25rem;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: 0.9375rem;
  transition: all 0.3s var(--ease-out);
  outline: none;
}

.input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

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

.form-group {
  display: flex;
  gap: 0.75rem;
}

/* ============================================
   Utilities
   ============================================ */

.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.gap-1 { gap: 0.25rem; }
.gap-2 { gap: 0.5rem; }
.gap-3 { gap: 0.75rem; }
.gap-4 { gap: 1rem; }
.gap-6 { gap: 1.5rem; }
.gap-8 { gap: 2rem; }
.text-center { text-align: center; }
.mx-auto { margin-left: auto; margin-right: auto; }
.mt-1 { margin-top: 0.25rem; }
.mt-2 { margin-top: 0.5rem; }
.mt-3 { margin-top: 0.75rem; }
.mt-4 { margin-top: 1rem; }
.mt-6 { margin-top: 1.5rem; }
.mt-8 { margin-top: 2rem; }
.mb-2 { margin-bottom: 0.5rem; }
.mb-4 { margin-bottom: 1rem; }
.mb-6 { margin-bottom: 1.5rem; }
.relative { position: relative; }
.z-10 { z-index: 10; }

.grid {
  display: grid;
  gap: 1.5rem;
}

.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }

/* ============================================
   Responsive
   ============================================ */

@media (max-width: 768px) {
  .grid-2, .grid-3 {
    grid-template-columns: 1fr;
  }

  .form-group {
    flex-direction: column;
  }

  .hide-mobile {
    display: none;
  }
}

@media (max-width: 480px) {
  .btn--lg {
    padding: 1rem 2rem;
    font-size: 1rem;
  }
}

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

::-webkit-scrollbar {
  width: 6px;
}

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

::-webkit-scrollbar-thumb {
  background: var(--bg-elevated);
  border-radius: 3px;
}

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

/* Selection */
::selection {
  background: var(--accent);
  color: #fff;
}