/* ============================================================
   BASE STYLES — Reset + Global Foundations
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;900&family=Syne:wght@700;800&family=JetBrains+Mono:wght@400;500&display=swap');

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  font-size: var(--text-base);
  font-weight: var(--weight-normal);
  line-height: var(--leading-normal);
  color: var(--text-primary);
  background-color: var(--bg-primary);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

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

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

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

ul, ol {
  list-style: none;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: var(--weight-bold);
  line-height: var(--leading-tight);
  color: var(--text-primary);
}

p {
  color: var(--text-secondary);
  line-height: var(--leading-loose);
}

input, textarea, select {
  font-family: inherit;
  font-size: inherit;
}

/* --- Layout Utilities --- */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--container-pad);
}

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

/* --- Section Spacing --- */
section {
  padding-block: var(--space-24);
}

/* --- Horizontal Rule --- */
hr {
  border: none;
  border-top: 1px solid var(--border);
}

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

/* --- Scrollbar --- */
::-webkit-scrollbar {
  width: 6px;
}
::-webkit-scrollbar-track {
  background: var(--bg-primary);
}
::-webkit-scrollbar-thumb {
  background: var(--border-hover);
  border-radius: var(--radius-full);
}
::-webkit-scrollbar-thumb:hover {
  background: var(--text-muted);
}

/* --- Utility Classes --- */
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

.text-accent    { color: var(--accent); }
.text-secondary { color: var(--text-secondary); }
.text-muted     { color: var(--text-muted); }
.text-mono      { font-family: var(--font-mono); }

.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-6);
}
.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
}

@media (max-width: 768px) {
  .grid-2, .grid-3 { grid-template-columns: 1fr; }
}
@media (min-width: 769px) and (max-width: 1024px) {
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
}


/* ============================================================
   ANIMATIONS
   ============================================================ */

/* --- Scroll Reveal --- */
.reveal {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 0.55s ease, transform 0.55s ease;
}

.reveal.is-visible {
  opacity: 1;
  transform: none;
}

/* --- Hero Entrance --- */
@keyframes heroFadeUp {
  from {
    opacity: 0;
    transform: translateY(28px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.hero-enter {
  opacity: 0;
  animation: heroFadeUp 0.7s cubic-bezier(0.22, 1, 0.36, 1) forwards;
}

/* --- Scroll Progress Bar --- */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  width: 0%;
  height: 2px;
  background: var(--accent);
  z-index: calc(var(--z-nav) + 1);
  pointer-events: none;
  transition: none;
}

/* --- 3D Card Tilt --- */
.tilt-card {
  will-change: transform;
  transition: transform 0.08s linear, box-shadow var(--transition-base);
}

.tilt-card::after {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background: radial-gradient(
    circle at var(--mouse-x, 50%) var(--mouse-y, 50%),
    rgba(0, 212, 255, 0.06) 0%,
    transparent 60%
  );
  opacity: 0;
  transition: opacity var(--transition-base);
  pointer-events: none;
}

.tilt-card:hover::after {
  opacity: 1;
}

/* --- Respect reduced motion --- */
@media (prefers-reduced-motion: reduce) {
  .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }
  .hero-enter {
    opacity: 1;
    animation: none;
  }
  .scroll-progress { display: none; }
  .tilt-card {
    will-change: auto;
    transition: none;
  }
  .tilt-card::after { display: none; }
}