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

:root {
  --color-bg:           #0A0E1A;
  --color-surface:      #111827;
  --color-surface-2:    #1A2332;
  --color-border:       #1E2D3D;
  --color-accent:       #00C2FF;
  --color-accent-2:     #7B5EA7;
  --color-gradient:     linear-gradient(135deg, #00C2FF, #7B5EA7);
  --color-text:         #F0F4FF;
  --color-text-muted:   #8899AA;
  --color-success:      #00E5A0;
  --radius-sm:          6px;
  --radius-md:          12px;
  --radius-lg:          20px;
  --shadow-glow:        0 0 30px rgba(0, 194, 255, 0.15);

  --font-heading: 'Syne', sans-serif;
  --font-body: 'DM Sans', sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  --max-width: 1200px;
  --section-py: 5rem;
}

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

html {
  scroll-behavior: smooth;
}

body {
  background-color: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

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

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

ul {
  list-style: none;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.15;
  color: var(--color-text);
}

h1 { font-size: clamp(2.2rem, 5vw, 4rem); }
h2 { font-size: clamp(1.8rem, 3.5vw, 2.8rem); }
h3 { font-size: clamp(1.2rem, 2.5vw, 1.6rem); }
h4 { font-size: 1.2rem; }

p {
  color: var(--color-text-muted);
  max-width: 65ch;
}

/* Layout */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
}

section {
  padding: var(--section-py) 0;
}

.section-label {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--color-accent);
  text-transform: uppercase;
  letter-spacing: 0.15em;
  margin-bottom: 0.75rem;
}

.section-title {
  margin-bottom: 1rem;
}

.section-subtitle {
  font-size: 1.1rem;
  color: var(--color-text-muted);
  max-width: 55ch;
  margin-bottom: 3rem;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.8rem 1.8rem;
  border-radius: 50px;
  font-family: var(--font-body);
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.25s ease;
  border: none;
  text-decoration: none;
}

.btn-primary {
  background: var(--color-gradient);
  color: #fff;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(0, 194, 255, 0.3);
}

.btn-ghost {
  background: transparent;
  color: var(--color-text);
  border: 1.5px solid var(--color-border);
}

.btn-ghost:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
  transform: translateY(-2px);
}

/* Dividers */
.gradient-line {
  height: 1px;
  background: var(--color-gradient);
  opacity: 0.3;
  border: none;
  margin: 0;
}

/* Dot grid background utility */
.dot-grid {
  background-image: radial-gradient(circle, rgba(0,194,255,0.08) 1px, transparent 1px);
  background-size: 32px 32px;
}

/* Glassmorphism card */
.glass-card {
  background: rgba(255,255,255,0.04);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: box-shadow 0.3s ease, transform 0.3s ease;
}

.glass-card:hover {
  box-shadow: var(--shadow-glow);
  transform: translateY(-3px);
}

/* Gradient text */
.gradient-text {
  background: var(--color-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* Grid utilities */
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1.5rem; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.5rem; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1.5rem; }

/* Breadcrumb */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--color-text-muted);
  padding: 1rem 0;
}

.breadcrumb a { color: var(--color-accent); }
.breadcrumb a:hover { text-decoration: underline; }
.breadcrumb span { color: var(--color-text-muted); }

/* Accordion */
.accordion-item {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  margin-bottom: 0.75rem;
}

.accordion-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.2rem 1.5rem;
  cursor: pointer;
  background: var(--color-surface);
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 1rem;
  transition: background 0.2s;
}

.accordion-header:hover { background: var(--color-surface-2); }

.accordion-icon {
  width: 20px;
  height: 20px;
  transition: transform 0.3s;
  flex-shrink: 0;
}

.accordion-item.open .accordion-icon {
  transform: rotate(45deg);
}

.accordion-body {
  display: none;
  padding: 1.2rem 1.5rem;
  background: var(--color-bg);
  color: var(--color-text-muted);
}

.accordion-item.open .accordion-body {
  display: block;
}

/* Tag / badge */
.tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 500;
  padding: 0.25rem 0.75rem;
  border-radius: 50px;
  background: rgba(0,194,255,0.12);
  color: var(--color-accent);
  letter-spacing: 0.05em;
}

/* Responsive */
@media (max-width: 1024px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  :root { --section-py: 3.5rem; }
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  h1 { font-size: 2rem; }
  h2 { font-size: 1.6rem; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}