/* layout.css — Grid, containers, spacing */

body {
  background-color: var(--color-bg);
  color: var(--color-text);
  display: flex;
  flex-direction: column;
}

main {
  flex: 1;
  padding-top: var(--header-height);
}

/* Containers */
.container {
  width: 100%;
  max-width: 900px;
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--sp-4);
  padding-right: var(--sp-4);
}

.container-wide {
  width: 100%;
  max-width: 1200px;
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--sp-4);
  padding-right: var(--sp-4);
}

/* Section spacing */
.section {
  padding-top: var(--sp-16);
  padding-bottom: var(--sp-16);
}

.section-sm {
  padding-top: var(--sp-12);
  padding-bottom: var(--sp-12);
}

/* Grid layouts */
.grid {
  display: grid;
  gap: var(--sp-6);
}

.grid-1 {
  grid-template-columns: 1fr;
}

.grid-2 {
  grid-template-columns: 1fr;
}

.grid-3 {
  grid-template-columns: 1fr;
}

.grid-4 {
  grid-template-columns: 1fr;
}

@media (min-width: 640px) {
  .container {
    padding-left: var(--sp-6);
    padding-right: var(--sp-6);
  }
  .container-wide {
    padding-left: var(--sp-6);
    padding-right: var(--sp-6);
  }
  .grid-2 {
    grid-template-columns: repeat(2, 1fr);
  }
  .grid-3 {
    grid-template-columns: repeat(2, 1fr);
  }
  .grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .container {
    padding-left: var(--sp-8);
    padding-right: var(--sp-8);
  }
  .container-wide {
    padding-left: var(--sp-8);
    padding-right: var(--sp-8);
  }
  .grid-3 {
    grid-template-columns: repeat(3, 1fr);
  }
  .grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1280px) {
  .grid-4 {
    grid-template-columns: repeat(4, 1fr);
  }
}

/* Hero section */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: var(--sp-12) var(--sp-4) var(--sp-24);
  align-items: flex-start;
  padding-top: 7vh;
  background: linear-gradient(160deg, var(--color-bg) 0%, var(--color-surface) 50%, var(--color-bg) 100%);
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 20% 50%, rgba(232, 93, 44, 0.06) 0%, transparent 50%),
    radial-gradient(circle at 80% 50%, rgba(45, 106, 79, 0.06) 0%, transparent 50%);
  pointer-events: none;
}

[data-theme="dark"] .hero {
  background: linear-gradient(160deg, var(--color-bg) 0%, #141428 50%, var(--color-bg) 100%);
}

[data-theme="dark"] .hero::before {
  background:
    radial-gradient(circle at 20% 50%, rgba(240, 121, 58, 0.08) 0%, transparent 50%),
    radial-gradient(circle at 80% 50%, rgba(64, 184, 124, 0.08) 0%, transparent 50%);
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 800px;
}

.hero-content h1 {
  font-size: 5.5rem;
  letter-spacing: -0.03em;
}

.hero-content .subtitle {
  font-size: 1.75rem;
  color: var(--color-text-muted);
  margin-top: var(--sp-3);
}

.hero-logo {
  width: 420px;
  height: auto;
  margin: 0 auto;
  display: block;
}

@media (max-width: 639px) {
  .hero-logo {
    width: 280px;
  }
}

.hero-tabs {
  margin-top: var(--sp-8);
  max-width: 640px;
  margin-left: auto;
  margin-right: auto;
}

.hero-tabs .tabs {
  justify-content: center;
  border-bottom-color: rgba(255, 255, 255, 0.15);
}

.hero-tabs .tab-content {
  padding: var(--sp-4) var(--sp-2);
  font-size: 1rem;
  color: var(--color-text-muted);
  line-height: 1.7;
}

@media (max-width: 639px) {
  .hero-content h1 {
    font-size: 2.75rem;
  }
  .hero-content .subtitle {
    font-size: 1.2rem;
  }
}

/* Page header */
.page-header {
  padding: calc(var(--header-height) + var(--sp-12)) var(--sp-4) var(--sp-12);
  text-align: center;
  border-bottom: 1px solid var(--color-border);
}

.page-header h1 {
  margin-bottom: var(--sp-3);
}

.page-header .subtitle {
  color: var(--color-text-muted);
  font-size: 1.1rem;
}

/* Hero intro (homepage body_html) */
.hero-intro {
  text-align: center;
  margin-bottom: var(--sp-12);
}

.hero-tagline {
  font-size: 1.6rem;
  color: var(--color-text-muted);
  max-width: 640px;
  margin: 0 auto var(--sp-6);
  line-height: 1.6;
}

.hero-cta {
  display: flex;
  gap: var(--sp-4);
  justify-content: center;
  flex-wrap: wrap;
}

/* Section divider */
.section-divider {
  height: 1px;
  background: var(--color-border);
  margin: var(--sp-12) 0;
}

/* Two-column about layout */
.about-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--sp-8);
  align-items: start;
}

@media (min-width: 768px) {
  .about-grid {
    grid-template-columns: 1fr 2fr;
  }
}