/* ================================================================
   LAYOUT.CSS — Grid System, Dashboard Layout, Responsive
   ================================================================ */

/* ── 12-COLUMN GRID ── */

.grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: var(--space-4);
}

.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; }

/* ── DASHBOARD LAYOUT ── */

.dashboard {
  display: grid;
  grid-template-rows: auto 1fr auto;
  grid-template-columns: 240px 1fr;
  grid-template-areas:
    "topbar  topbar"
    "sidebar main"
    "footer  footer";
  min-height: 100vh;
}

.dashboard__topbar  { grid-area: topbar; }
.dashboard__sidebar { grid-area: sidebar; }
.dashboard__main    { grid-area: main; padding: var(--space-8); overflow-y: auto; }
.dashboard__footer  { grid-area: footer; }

/* ── MOBILE SIDEBAR TOGGLE ── */

#sidebar-toggle {
  display: none;
}

.sidebar-hamburger {
  display: none;
  background: none;
  border: none;
  color: var(--text-inverse);
  font-family: var(--font-data);
  font-size: var(--text-lg);
  cursor: pointer;
  padding: var(--space-1) var(--space-2);
  line-height: 1;
}

/* Mobile sidebar overlay backdrop */
.sidebar-overlay {
  display: none;
}

/* ── AUTH LAYOUT (login/verify) ── */

.auth-layout {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--space-6);
  background: var(--bg-secondary);
}

.auth-layout__card {
  width: 100%;
  max-width: 400px;
}

/* ── CONTAINER ── */

.container {
  width: 100%;
  max-width: 1200px;
  margin-inline: auto;
  padding-inline: var(--space-6);
}

.container--narrow { max-width: 560px; }
.container--wide   { max-width: 1440px; }
.container--full   { max-width: none; }

/* ── RESPONSIVE: TABLET ── */

@media (min-width: 769px) and (max-width: 1024px) {
  .grid {
    grid-template-columns: repeat(6, 1fr);
  }
}

/* ── RESPONSIVE: MOBILE ── */

@media (max-width: 768px) {
  .grid {
    grid-template-columns: 1fr;
  }
  [class*="col-"] {
    grid-column: span 1;
  }

  /* Dashboard becomes single-column */
  .dashboard {
    grid-template-columns: 1fr;
    grid-template-areas:
      "topbar"
      "main"
      "footer";
  }

  .dashboard__main {
    padding: var(--space-4);
  }

  /* Sidebar: hidden by default, slides in on toggle */
  .dashboard__sidebar {
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    width: 280px;
    z-index: var(--z-overlay);
    transform: translateX(-100%);
    transition: transform 0.2s ease;
  }

  /* Show hamburger */
  .sidebar-hamburger {
    display: block;
  }

  /* When checkbox is checked, show sidebar */
  #sidebar-toggle:checked ~ .dashboard__sidebar {
    transform: translateX(0);
  }

  /* Overlay backdrop */
  .sidebar-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: calc(var(--z-overlay) - 1);
    display: none;
  }

  #sidebar-toggle:checked ~ .sidebar-overlay {
    display: block;
  }
}

/* ── GRID UTILITIES ── */

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

.grid--3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-4);
}

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

@media (max-width: 768px) {
  .grid--2,
  .grid--3,
  .grid--4 {
    grid-template-columns: 1fr;
  }
}

@media (min-width: 769px) and (max-width: 1024px) {
  .grid--3,
  .grid--4 {
    grid-template-columns: repeat(2, 1fr);
  }
}