/* ============================================================
   LAYOUT.CSS — Containers, Sections, Grid Systems
   The Architect | Phan Hai Nga Advisory
   ============================================================ */

/* ============================================================
   CONTAINERS
   ============================================================ */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: 1.5rem;
  padding-right: 1.5rem;
}

.container--wide {
  max-width: var(--container-wide);
  margin-left: auto;
  margin-right: auto;
  padding-left: 1.5rem;
  padding-right: 1.5rem;
}

.container--narrow {
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
  padding-left: 1.5rem;
  padding-right: 1.5rem;
}

/* ============================================================
   SECTION BASE
   ============================================================ */
.section {
  padding-top: var(--section-gap);
  padding-bottom: var(--section-gap);
}

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

.section--dark {
  background-color: var(--color-navy);
  color: var(--color-white);
}

.section--dark h1,
.section--dark h2,
.section--dark h3,
.section--dark h4 {
  color: var(--color-white);
}

.section--dark p {
  color: rgba(255, 255, 255, 0.75);
}

.section--navy-mid {
  background-color: var(--color-navy-mid);
  color: var(--color-white);
}

.section--navy-mid h1,
.section--navy-mid h2,
.section--navy-mid h3,
.section--navy-mid h4 {
  color: var(--color-white);
}

.section--off-white {
  background-color: var(--color-off-white);
}

.section--white {
  background-color: var(--color-off-white);
}

/* Section Header */
.section__header {
  margin-bottom: 3rem;
}

.section__header--center {
  text-align: center;
}

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

.section__title {
  font-size: var(--text-h2);
  margin-bottom: 1rem;
  line-height: 1.2;
}

.section__subtitle {
  font-size: var(--text-body-lg);
  color: var(--color-gray-dark); /* gray-mid không đủ tương phản trên nền sáng (~2.8:1, fail WCAG AA) */
  max-width: 600px;
  line-height: 1.7;
  text-align: justify;
}

.section--dark .section__subtitle,
.section--navy-mid .section__subtitle {
  color: rgba(255, 255, 255, 0.65);
}

.section__header--center .section__subtitle {
  margin-left: auto;
  margin-right: auto;
}

/* ============================================================
   GRID SYSTEMS
   ============================================================ */

/* 3-column default grid */
.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--grid-gap);
}

/* 2-column grid */
.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--grid-gap);
}

/* 4-column grid */
.grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--grid-gap);
}

/* Auto-fit grid — cards */
.grid-auto {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--grid-gap);
}

/* Insights magazine grid — hero + 2 sidebar */
.grid-insights {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  grid-template-rows: auto auto;
  gap: var(--grid-gap);
}

.grid-insights .card--featured {
  grid-column: 1 / 3;
  grid-row: 1 / 3;
}

/* 2-col asymmetric (text + image) */
.grid-split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
}

.grid-split--60-40 {
  grid-template-columns: 6fr 4fr;
}

/* ============================================================
   HERO LAYOUT
   ============================================================ */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  background-color: var(--color-navy);
  overflow: hidden;
}

.hero__bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}

/* Geometric pattern overlay */
.hero__bg::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(circle at 20% 50%, rgba(10, 102, 194, 0.08) 0%, transparent 50%),
    radial-gradient(circle at 80% 20%, rgba(var(--color-accent-alt-rgb), 0.08) 0%, transparent 40%);
  z-index: 1;
}

/* Grid lines overlay */
.hero__bg::after {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(10, 102, 194, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(10, 102, 194, 0.04) 1px, transparent 1px);
  background-size: 60px 60px;
  z-index: 2;
}

.hero__content {
  position: relative;
  z-index: 10;
  width: 100%;
}

/* ============================================================
   MARQUEE / TICKER
   ============================================================ */
.marquee {
  overflow: hidden;
  white-space: nowrap;
  background: linear-gradient(90deg, var(--color-accent-dark), var(--color-accent), var(--color-accent-light), var(--color-accent));
  padding: 0.625rem 0;
}

.marquee__track {
  display: inline-block;
  animation: marquee-scroll 30s linear infinite;
}

.marquee__track:hover {
  animation-play-state: paused;
}

.marquee__item {
  display: inline-block;
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-navy);
  padding: 0 2.5rem;
}

.marquee__item::after {
  content: '◆';
  margin-left: 2.5rem;
  opacity: 0.5;
}

/* ============================================================
   STATS / KPI ROW
   ============================================================ */
.stats-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  border-top: 1px solid var(--color-gray-light);
  border-bottom: 1px solid var(--color-gray-light);
}

.stats-row--dark {
  border-color: rgba(255, 255, 255, 0.1);
}

.stat-item {
  padding: 2.5rem 2rem;
  text-align: center;
  border-right: 1px solid var(--color-gray-light);
  transition: background-color var(--transition-base);
}

.stat-item:last-child {
  border-right: none;
}

.stats-row--dark .stat-item {
  border-color: rgba(255, 255, 255, 0.1);
}

.stat-item:hover {
  background-color: rgba(10, 102, 194, 0.05);
}

.stat-item__number {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 700;
  color: var(--color-accent);
  line-height: 1;
  margin-bottom: 0.5rem;
}

.stat-item__label {
  font-size: var(--text-sm);
  color: var(--color-gray-mid);
  font-weight: 500;
  letter-spacing: 0.05em;
}

.section--dark .stat-item__label {
  color: rgba(255, 255, 255, 0.55);
}

/* ============================================================
   RESPONSIVE — TABLET (max 1024px)
   ============================================================ */
@media (max-width: 1024px) {
  .grid-3 {
    grid-template-columns: repeat(2, 1fr);
  }

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

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

  .grid-insights .card--featured {
    grid-column: 1 / -1;
    grid-row: auto;
  }

  .grid-split {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }

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

  .stat-item:nth-child(2) {
    border-right: none;
  }

  .stat-item:nth-child(3) {
    border-top: 1px solid var(--color-gray-light);
  }

  .stat-item:nth-child(4) {
    border-top: 1px solid var(--color-gray-light);
    border-right: none;
  }

  .stats-row--dark .stat-item:nth-child(3),
  .stats-row--dark .stat-item:nth-child(4) {
    border-color: rgba(255, 255, 255, 0.1);
  }
}

/* ============================================================
   RESPONSIVE — MOBILE (max 768px)
   ============================================================ */
@media (max-width: 768px) {
  :root {
    --section-gap: 4rem;
    --grid-gap: 1.25rem;
  }

  .container,
  .container--wide,
  .container--narrow {
    padding-left: 1.25rem;
    padding-right: 1.25rem;
  }

  .grid-3,
  .grid-2,
  .grid-4,
  .grid-auto {
    grid-template-columns: 1fr;
  }

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

  .grid-insights .card--featured {
    grid-column: 1;
  }

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

  .section__header {
    margin-bottom: 2rem;
  }
}

/* ============================================================
   RESPONSIVE — SMALL MOBILE (max 480px)
   ============================================================ */
@media (max-width: 480px) {
  .stats-row {
    grid-template-columns: 1fr 1fr;
  }

  .stat-item {
    padding: 1.5rem 1rem;
  }
}