/* ============================================
   CONTAINERS
   ============================================ */
.container {
  width: 100%;
  max-width: var(--container-max-width, 1200px);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--spacing-md);
  padding-right: var(--spacing-md);
}
.container-fluid {
  width: 100%;
  padding-left: var(--spacing-md);
  padding-right: var(--spacing-md);
}
.container-sm {
  width: 100%;
  max-width: 640px;
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--spacing-md);
  padding-right: var(--spacing-md);
}
.container-lg {
  width: 100%;
  max-width: 1024px;
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--spacing-md);
  padding-right: var(--spacing-md);
}

/* Responsive container widths */
@media (min-width: 640px) {
  .container { max-width: 640px; }
}
@media (min-width: 768px) {
  .container { max-width: 768px; }
}
@media (min-width: 1024px) {
  .container { max-width: 1024px; }
}
@media (min-width: 1200px) {
  .container { max-width: 1200px; }
}

/* ============================================
   GRID SYSTEM
   ============================================ */
.row {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: var(--spacing-md);
  overflow-x: auto;
}

.col-1  { grid-column: span 1; }
.col-2  { grid-column: span 2; }
.col-3  { grid-column: span 3; }
.col-4  { grid-column: span 4; }
.col-5  { grid-column: span 5; }
.col-6  { grid-column: span 6; }
.col-7  { grid-column: span 7; }
.col-8  { grid-column: span 8; }
.col-9  { grid-column: span 9; }
.col-10 { grid-column: span 10; }
.col-11 { grid-column: span 11; }
.col-12 { grid-column: span 12; }
.col-auto { grid-column: auto; }

/* Responsive: sm (640px+) */
@media (min-width: 640px) {
  .col-sm-1  { grid-column: span 1; }
  .col-sm-2  { grid-column: span 2; }
  .col-sm-3  { grid-column: span 3; }
  .col-sm-4  { grid-column: span 4; }
  .col-sm-5  { grid-column: span 5; }
  .col-sm-6  { grid-column: span 6; }
  .col-sm-7  { grid-column: span 7; }
  .col-sm-8  { grid-column: span 8; }
  .col-sm-9  { grid-column: span 9; }
  .col-sm-10 { grid-column: span 10; }
  .col-sm-11 { grid-column: span 11; }
  .col-sm-12 { grid-column: span 12; }
}

/* Responsive: md (768px+) */
@media (min-width: 768px) {
  .col-md-1  { grid-column: span 1; }
  .col-md-2  { grid-column: span 2; }
  .col-md-3  { grid-column: span 3; }
  .col-md-4  { grid-column: span 4; }
  .col-md-5  { grid-column: span 5; }
  .col-md-6  { grid-column: span 6; }
  .col-md-7  { grid-column: span 7; }
  .col-md-8  { grid-column: span 8; }
  .col-md-9  { grid-column: span 9; }
  .col-md-10 { grid-column: span 10; }
  .col-md-11 { grid-column: span 11; }
  .col-md-12 { grid-column: span 12; }
}

/* Responsive: lg (1024px+) */
@media (min-width: 1024px) {
  .col-lg-1  { grid-column: span 1; }
  .col-lg-2  { grid-column: span 2; }
  .col-lg-3  { grid-column: span 3; }
  .col-lg-4  { grid-column: span 4; }
  .col-lg-5  { grid-column: span 5; }
  .col-lg-6  { grid-column: span 6; }
  .col-lg-7  { grid-column: span 7; }
  .col-lg-8  { grid-column: span 8; }
  .col-lg-9  { grid-column: span 9; }
  .col-lg-10 { grid-column: span 10; }
  .col-lg-11 { grid-column: span 11; }
  .col-lg-12 { grid-column: span 12; }
}

/* ============================================
   MEDIA OBJECT
   ============================================ */
.media {
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-md);
}
.media-body {
  flex: 1;
  min-width: 0;
}

/* ============================================
   LEVEL
   ============================================ */
.level {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--spacing-md);
}
.level-left,
.level-right {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

/* ============================================
   SECTION
   ============================================ */
.section {
  padding: var(--spacing-xl) 0;
}
.section-bg {
  background-color: var(--bg-surface);
  padding: var(--spacing-xl) var(--spacing-lg);
  border-radius: var(--radius-lg);
}

/* ============================================
   STACK
   ============================================ */
.vstack {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}
.hstack {
  display: flex;
  flex-direction: row;
  align-items: center;
  gap: var(--spacing-md);
}

/* ============================================
   TILES
   ============================================ */
.tiles {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: var(--spacing-md);
}
.tiles > .card {
  display: flex;
  flex-direction: column;
}
.tiles > .card > .card-body {
  flex: 1;
}

/* ============================================
   ARTBOARD
   ============================================ */
.artboard {
  background-color: var(--bg-base);
  border: 1px solid var(--border-base);
  border-radius: var(--radius-md);
  overflow: hidden;
  max-width: 100%;
}
.artboard-phone-1 { width: 320px; height: 568px; }
.artboard-phone-2 { width: 375px; height: 667px; }
.artboard-phone-3 { width: 414px; height: 736px; }
.artboard-phone-4 { width: 390px; height: 844px; }

/* ============================================
   SPLIT
   ============================================ */
.split {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-xl);
  align-items: center;
  overflow: clip;
  max-width: 1200px;
  margin-left: auto;
  margin-right: auto;
}
@media (min-width: 768px) {
  .split {
    grid-template-columns: 1fr 1fr;
  }
}

/* ============================================
   TRIO
   ============================================ */
.trio {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-md);
  max-width: 1200px;
  margin-left: auto;
  margin-right: auto;
}
@media (min-width: 768px) {
  .trio {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* ============================================
   QUARTET
   ============================================ */
.quartet {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--spacing-md);
}
@media (min-width: 768px) {
  .quartet {
    grid-template-columns: repeat(4, 1fr);
  }
}

/* ============================================
   AUTH PAGE — centered single-card layout
   for login, register, consent, reset-password
   ============================================ */
.auth-page {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-lg);
  background: var(--bg-base);
}
.auth-page > .card {
  width: 100%;
  max-width: 420px;
}