/*
  css/layout.css
  Layout primitives: Grid, Container, Sectioning.
*/

/* App Shell */
html {
  scroll-behavior: smooth;
}

.app-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-height);
  padding: 0 var(--gap);
  display: flex;
  align-items: center;
  /* Glassmorphism */
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.3);
  box-shadow: var(--shadow-sm);
}

@media (max-width: 899px) {
  .app-header {
    padding: 0;
  }
}

.app-main {
  min-height: calc(100vh - var(--header-height));
  width: 100%;
  padding-bottom: 4rem;
}

.app-footer {
  background: #fff;
  border-top: 1px solid var(--border);
  padding: 2rem 0;
}

@media (min-width: 768px) {
  .app-footer {
    padding: 4rem 0;
  }
}

/* Container */
.container {
  width: 100%;
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 var(--gap);
}

/* Grids & Stacks */
.grid {
  display: grid;
  gap: var(--gap);
}

.stack {
  display: flex;
  flex-direction: column;
  gap: var(--gap);
}

/* Responsive Grid for Cards */
.grid--cards {
  grid-template-columns: 1fr;
}

@media (min-width: 640px) {
  .grid--cards {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .grid--cards {
    grid-template-columns: repeat(3, 1fr);
  }
}

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

@media (min-width: 640px) {
  .grid--2-col-tablet {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* Dashboard Layout Shell */
.dash {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
  margin-top: 1rem;
}

@media (min-width: 992px) {
  .dash {
    grid-template-columns: 280px 1fr;
    margin-top: 2rem;
  }
}

/* Sidebar Shell */
.dash__sidebar {
  position: relative;
}

@media (max-width: 991px) {
  .dash__sidebar {
    position: fixed;
    top: var(--header-height);
    left: 0;
    bottom: 0;
    width: 280px;
    background: white;
    box-shadow: var(--shadow-lg);
    z-index: 1000;
    transform: translateX(-100%);
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    display: block; /* Override default if needed */
    padding: 1.5rem;
    overflow-y: auto;
  }

  .dash__sidebar.isOpen {
    transform: translateX(0);
  }
}

@media (min-width: 992px) {
  .dash__sidebar {
    position: sticky;
    top: calc(var(--header-height) + 2rem);
    height: fit-content;
  }
}

/* Dashboard Toggle (Mobile Only) */
.dash-nav-toggle {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  width: 100%;
  padding: 0.85rem 1.25rem;
  background: #f59e0b;
  border: none;
  border-radius: var(--radius-md);
  margin-bottom: 1rem;
  cursor: pointer;
  font-weight: 700;
  font-size: 0.95rem;
  color: #ffffff;
  box-shadow: 0 2px 8px rgba(245,158,11,0.35);
  letter-spacing: 0.01em;
  transition: background 0.2s;
}

.dash-nav-toggle:hover {
  background: #d97706;
}

@media (min-width: 992px) {
  .dash-nav-toggle {
    display: none;
  }
}

.dash__main {
  min-width: 0; /* Prevents flex/grid overflow */
}

/* Sidebar overlay backdrop (mobile only) */
.dash-sidebar-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.45);
  z-index: 999;
  cursor: pointer;
}

.dash-sidebar-overlay.isOpen {
  display: block;
}

/* Utilities */
.section {
  padding: 3rem 0;
}

.hidden {
  display: none !important;
}

.mt-1 {
  margin-top: 0.5rem;
}

.mt-2 {
  margin-top: 1rem;
}

.mt-4 {
  margin-top: 2rem;
}

.mb-1 {
  margin-bottom: 0.5rem;
}

.mb-2 {
  margin-bottom: 1rem;
}

.mb-4 {
  margin-bottom: 2rem;
}