/* ============================================
   BASE STYLES — Reset, Typography, Utilities
   ============================================ */

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

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  scroll-padding-top: 80px;
}

body {
  font-family: var(--font-primary);
  font-size: var(--text-base);
  font-weight: var(--font-regular);
  line-height: var(--leading-normal);
  color: var(--color-text);
  background-color: var(--color-bg);
  overflow-x: hidden;
  min-height: 100vh;
}

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

a {
  color: inherit;
  text-decoration: none;
  transition: color var(--duration-fast) var(--ease-out);
}

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

ul, ol {
  list-style: none;
}

input, textarea, select {
  font: inherit;
  color: inherit;
  background: none;
  border: none;
  outline: none;
}

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

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

/* ---- Scrollbar ---- */
::-webkit-scrollbar {
  width: 8px;
}
::-webkit-scrollbar-track {
  background: var(--color-bg);
}
::-webkit-scrollbar-thumb {
  background: var(--color-bg-card);
  border-radius: var(--radius-full);
}
::-webkit-scrollbar-thumb:hover {
  background: var(--color-surface);
}

/* ---- Typography ---- */
h1, h2, h3, h4, h5, h6 {
  font-weight: var(--font-bold);
  line-height: var(--leading-tight);
  letter-spacing: var(--tracking-tight);
  color: var(--color-text);
}

h1 { font-size: clamp(2.25rem, 5vw, var(--text-7xl)); }
h2 { font-size: clamp(1.75rem, 4vw, var(--text-5xl)); }
h3 { font-size: clamp(1.25rem, 2.5vw, var(--text-3xl)); }
h4 { font-size: clamp(1.1rem, 2vw, var(--text-xl)); }

p {
  color: var(--color-text-muted);
  line-height: var(--leading-relaxed);
}

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

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

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

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

.section--bordered {
  border-top: 1px solid var(--color-border);
}

/* ---- Grid ---- */
.grid {
  display: grid;
  gap: var(--space-8);
}

.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

/* ---- Flex ---- */
.flex { display: flex; }
.flex-col { flex-direction: column; }
.flex-wrap { flex-wrap: wrap; }
.items-center { align-items: center; }
.items-start { align-items: flex-start; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.gap-1 { gap: var(--space-1); }
.gap-2 { gap: var(--space-2); }
.gap-3 { gap: var(--space-3); }
.gap-4 { gap: var(--space-4); }
.gap-6 { gap: var(--space-6); }
.gap-8 { gap: var(--space-8); }

/* ---- Text Utilities ---- */
.text-center { text-align: center; }
.text-accent { color: var(--color-accent); }
.text-green { color: var(--color-green); }
.text-cyan { color: var(--color-cyan); }
.text-muted { color: var(--color-text-muted); }
.text-dim { color: var(--color-text-dim); }

/* ---- Section Header ---- */
.section-header {
  max-width: 700px;
  margin-bottom: var(--space-16);
  position: relative;
}

.section-header::before {
  content: '';
  position: absolute;
  top: -8px;
  left: 0;
  width: 40px;
  height: 2px;
  background: linear-gradient(90deg, var(--color-accent), transparent);
  opacity: 0;
  transform: scaleX(0);
  transform-origin: left;
  transition: opacity var(--duration-slow) var(--ease-out), transform var(--duration-slow) var(--ease-out);
}

.section-header.revealed::before {
  opacity: 0.6;
  transform: scaleX(1);
}

.section-header.text-center {
  margin-left: auto;
  margin-right: auto;
}

.section-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-xs);
  font-weight: var(--font-semibold);
  letter-spacing: var(--tracking-widest);
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: var(--space-4);
  font-family: var(--font-mono);
}

.section-eyebrow::before {
  content: '';
  display: block;
  width: 20px;
  height: 1px;
  background: var(--color-accent);
}

.section-title {
  margin-bottom: var(--space-4);
}

.section-subtitle {
  font-size: clamp(var(--text-base), 1.5vw, var(--text-lg));
  color: var(--color-text-muted);
  line-height: var(--leading-relaxed);
}

/* ---- Buttons ---- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: 0.85rem 2rem;
  font-size: var(--text-sm);
  font-weight: var(--font-semibold);
  letter-spacing: var(--tracking-wide);
  border-radius: var(--radius-md);
  transition: all var(--duration-base) var(--ease-out);
  white-space: nowrap;
  position: relative;
  overflow: hidden;
}

.btn--primary {
  background: var(--color-accent);
  color: var(--color-white);
  box-shadow: 0 0 20px var(--color-accent-glow);
}

.btn--primary:hover {
  background: var(--color-accent-light);
  box-shadow: var(--shadow-glow-strong);
  transform: translateY(-2px);
}

.btn--outline {
  background: transparent;
  color: var(--color-text);
  border: 1px solid var(--color-border-hover);
}

.btn--outline:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
  background: var(--color-accent-glow);
}

.btn--ghost {
  background: transparent;
  color: var(--color-text-muted);
  padding: 0.5rem 0;
}

.btn--ghost:hover {
  color: var(--color-accent);
}

.btn--sm {
  padding: 0.5rem 1.25rem;
  font-size: var(--text-xs);
}

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

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

/* ---- Card Base ---- */
.card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-8);
  transition: all var(--duration-base) var(--ease-out);
  position: relative;
  overflow: hidden;
}

.card:hover {
  border-color: var(--color-border-hover);
  background: var(--color-bg-card-hover);
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--color-accent-glow-strong), transparent);
  opacity: 0;
  transition: opacity var(--duration-base) var(--ease-out);
}

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

/* ---- Tags / Badges ---- */
.tag {
  display: inline-flex;
  align-items: center;
  padding: 0.3rem 0.75rem;
  font-size: var(--text-xs);
  font-weight: var(--font-medium);
  border-radius: var(--radius-full);
  background: var(--color-accent-glow);
  color: var(--color-accent-light);
  border: 1px solid rgba(59, 130, 246, 0.15);
}

.tag--green {
  background: var(--color-green-dim);
  color: var(--color-green);
  border-color: rgba(16, 185, 129, 0.15);
}

.tag--cyan {
  background: var(--color-cyan-dim);
  color: var(--color-cyan);
  border-color: rgba(6, 182, 212, 0.15);
}

/* ---- Reveal Animation Classes ---- */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity var(--duration-slower) var(--ease-out),
              transform var(--duration-slower) var(--ease-out);
}

.reveal.revealed {
  opacity: 1;
  transform: translateY(0);
}

.reveal-delay-1 { transition-delay: 100ms; }
.reveal-delay-2 { transition-delay: 200ms; }
.reveal-delay-3 { transition-delay: 300ms; }
.reveal-delay-4 { transition-delay: 400ms; }
.reveal-delay-5 { transition-delay: 500ms; }

/* ---- Divider ---- */
.divider {
  width: 40px;
  height: 2px;
  background: var(--color-accent);
  border-radius: var(--radius-full);
}

.divider--center {
  margin: 0 auto var(--space-8);
}