/* ============================================
   BASE — STRICT CORPORATE RESET
   ============================================ */

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

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

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

body {
  font-family: var(--font-body);
  font-size: var(--fs-body);
  font-weight: var(--fw-regular);
  line-height: var(--lh-normal);
  color: var(--text-primary);
  background: var(--bg-primary);
  overflow-x: hidden;
}

/* === TYPOGRAPHY === */
h1, h2, h3, h4, h5 {
  font-family: var(--font-heading);
  font-weight: var(--fw-bold);
  line-height: var(--lh-heading);
  letter-spacing: var(--ls-tight);
  color: var(--text-primary);
}

h1 { font-size: var(--fs-h1); }
h2 { font-size: var(--fs-h2); }
h3 { font-size: var(--fs-h3); }
h4 { font-size: var(--fs-h4); }

p {
  color: var(--text-secondary);
  line-height: var(--lh-normal);
}

a {
  color: var(--accent);
  text-decoration: none;
  transition: color var(--transition);
}

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

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

ul { list-style: none; }

/* === LAYOUT === */
.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 2rem;
}

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

.section {
  padding: var(--space-5xl) 0;
}

.section--dark {
  background: var(--bg-dark);
  color: var(--text-inverse);
}

.section--gray {
  background: var(--bg-secondary);
}

/* === UTILITIES === */
.text-center { text-align: center; }
.text-accent { color: var(--accent); }
.text-uppercase { text-transform: uppercase; letter-spacing: var(--ls-wide); font-size: var(--fs-xs); font-weight: var(--fw-semibold); }

/* Section header */
.section-label {
  display: inline-block;
  font-size: var(--fs-xs);
  font-weight: var(--fw-bold);
  text-transform: uppercase;
  letter-spacing: var(--ls-wider);
  color: var(--accent);
  margin-bottom: var(--space-md);
}

.section-title {
  font-size: var(--fs-h2);
  margin-bottom: var(--space-lg);
}

.section-subtitle {
  font-size: var(--fs-body);
  color: var(--text-secondary);
  max-width: 600px;
  line-height: var(--lh-normal);
}

.section-header {
  margin-bottom: var(--space-3xl);
}

/* Divider line */
.divider {
  width: 60px;
  height: 3px;
  background: var(--accent);
  margin: var(--space-lg) 0;
}

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

/* === SCROLL PROGRESS === */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  background: var(--accent);
  z-index: 10000;
  width: 0%;
  transition: width 0.1s linear;
}

/* === LOADING SCREEN === */
.loading-screen {
  position: fixed;
  inset: 0;
  background: var(--bg-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 99999;
  transition: opacity 0.4s, visibility 0.4s;
}

.loading-screen.hidden {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

.loading-logo {
  animation: pulse 1.5s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.7; transform: scale(0.95); }
}

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