/* ══════════════════════════════════════════════════════════
   layout.css — Grid, containers, sidebar, header, nav
   uiux.bd — Bangladesh UI/UX Designer Community
   ══════════════════════════════════════════════════════════ */

/* ── Container ─────────────────────────────────────────── */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-4);
}

/* ── App shell — authenticated layout ──────────────────── */
.app-shell {
  display: flex;
  min-height: 100vh;
  padding-top: var(--header-height);
}

/* ── Header ────────────────────────────────────────────── */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  background-color: var(--color-surface);
  border-bottom: 1px solid transparent;
  display: flex;
  align-items: center;
  padding: 0 var(--space-8);
  z-index: 1000;
}

[data-theme="dark"] .header {
  background-color: var(--color-surface);
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
}

.header__left {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.header__logo {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  text-decoration: none;
  font-weight: var(--weight-bold);
  font-size: var(--text-lg);
  color: var(--color-text-primary);
}

.header__logo-icon {
  width: 32px;
  height: 32px;
}

.header__logo-text {
  color: var(--color-text-primary);
  letter-spacing: -0.02em;
  font-weight: var(--weight-bold);
}

.header__search {
  position: relative;
  width: 100%;
  max-width: 400px;
}

.header__search-input {
  width: 100%;
  height: 38px;
  padding: var(--space-2) var(--space-4);
  padding-left: var(--space-10);
  background-color: var(--color-surface-2);
  border: 1px solid transparent;
  border-radius: var(--radius-full);
  font-size: var(--text-sm);
  color: var(--color-text-primary);
  transition: all var(--transition-base);
  font-family: var(--font-sans);
}

.header__search-input:focus {
  outline: none;
  border-color: var(--color-primary);
  background-color: var(--color-surface);
  box-shadow: 0 0 0 3px var(--color-primary-light);
}

.header__search-input::placeholder {
  color: var(--color-text-muted);
}

.header__search-icon {
  position: absolute;
  left: var(--space-4);
  top: 50%;
  transform: translateY(-50%);
  width: 16px;
  height: 16px;
  color: var(--color-text-muted);
  pointer-events: none;
}

.header__right {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.header__notification-btn {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border: none;
  background-color: transparent;
  border-radius: var(--radius-full);
  cursor: pointer;
  color: var(--color-text-secondary);
  transition: all var(--transition-fast);
}

.header__notification-btn:hover {
  background-color: var(--color-surface-2);
  color: var(--color-text-primary);
}

.header__notification-badge {
  position: absolute;
  top: 4px;
  right: 4px;
  min-width: 16px;
  height: 16px;
  background-color: var(--color-error);
  color: var(--color-text-inverse);
  font-size: 10px;
  font-weight: var(--weight-bold);
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0 4px;
  line-height: 1;
}

.header__upload-btn {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  height: 36px;
  padding: 0 var(--space-4);
  background: linear-gradient(
    135deg,
    var(--color-primary),
    var(--color-primary-dark)
  );
  color: var(--color-on-primary);
  border: none;
  border-radius: var(--radius-full);
  font-size: var(--text-sm);
  font-weight: var(--weight-semibold);
  cursor: pointer;
  transition: all var(--transition-fast);
  font-family: var(--font-sans);
}

.header__upload-btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 12px var(--color-primary-shadow);
}

.header__avatar-btn {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-full);
  border: 2px solid var(--color-border);
  overflow: hidden;
  cursor: pointer;
  transition: border-color var(--transition-fast);
  background: none;
  padding: 0;
}

.header__avatar-btn:hover {
  border-color: var(--color-primary);
}

.header__avatar-btn img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* ── Sidebar ───────────────────────────────────────────── */
.sidebar {
  position: fixed;
  top: var(--header-height);
  left: 0;
  bottom: 0;
  width: var(--sidebar-width);
  background-color: var(--color-surface);
  border-right: 1px solid var(--color-border);
  padding: var(--space-4) 0;
  overflow-y: auto;
  z-index: 900;
  transition: transform var(--transition-base);
}

.sidebar__nav {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  padding: 0 var(--space-3);
}

.sidebar__link {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-md);
  color: var(--color-text-secondary);
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  text-decoration: none;
  transition: all var(--transition-fast);
}

.sidebar__link:hover {
  background-color: var(--color-surface-2);
  color: var(--color-text-primary);
}

.sidebar__link--active {
  background-color: var(--color-primary-light);
  color: var(--color-primary);
  font-weight: var(--weight-semibold);
}

.sidebar__link-icon {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
  opacity: 0.7;
}

.sidebar__link--active .sidebar__link-icon {
  opacity: 1;
}

.sidebar__divider {
  height: 1px;
  background-color: var(--color-border);
  margin: var(--space-3) var(--space-4);
}

.sidebar__pro-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-1) var(--space-2);
  background: linear-gradient(
    135deg,
    var(--color-accent),
    #FF8F5C
  );
  color: var(--color-text-inverse);
  font-size: var(--text-xs);
  font-weight: var(--weight-bold);
  border-radius: var(--radius-full);
  animation: glow 2s ease-in-out infinite alternate;
}

@keyframes glow {
  from {
    box-shadow: 0 0 4px rgba(255, 107, 43, 0.3);
  }
  to {
    box-shadow: 0 0 12px rgba(255, 107, 43, 0.5);
  }
}

/* ── Main content ──────────────────────────────────────── */
.main-content {
  flex: 1;
  margin-left: var(--sidebar-width);
  padding: var(--space-8);
  min-height: calc(100vh - var(--header-height));
}

/* ── Right rail ────────────────────────────────────────── */
.right-rail {
  width: 240px;
  flex-shrink: 0;
  padding: var(--space-8) 0;
  display: none;
}

/* ── Mobile bottom nav ─────────────────────────────────── */
.mobile-nav {
  display: none;
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  height: 56px;
  background-color: var(--color-surface);
  border-top: 1px solid var(--color-border);
  z-index: 1000;
  backdrop-filter: blur(12px);
}

[data-theme="dark"] .mobile-nav {
  background-color: var(--color-surface);
}

.mobile-nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-around;
  height: 100%;
  max-width: 480px;
  margin: 0 auto;
}

.mobile-nav__link {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  padding: var(--space-1);
  color: var(--color-text-muted);
  text-decoration: none;
  font-size: 10px;
  font-weight: var(--weight-medium);
  transition: color var(--transition-fast);
}

.mobile-nav__link--active {
  color: var(--color-primary);
}

.mobile-nav__link:hover {
  color: var(--color-primary);
}

.mobile-nav__icon {
  width: 22px;
  height: 22px;
}

/* ── Responsive ────────────────────────────────────────── */

/* Show right rail on large screens */
@media (min-width: 1280px) {
  .right-rail {
    display: block;
  }
}

/* Hide sidebar, show bottom nav on tablet and below */
@media (max-width: 1023px) {
  .sidebar {
    transform: translateX(-100%);
  }

  .sidebar--open {
    transform: translateX(0);
  }

  .main-content {
    margin-left: 0;
    padding: var(--space-4);
    padding-bottom: calc(56px + var(--space-4));
  }

  .mobile-nav {
    display: block;
  }

  .header__search {
    display: none;
  }

  .header__upload-btn span {
    display: none;
  }
}

/* Small mobile adjustments */
@media (max-width: 479px) {
  .main-content {
    padding: var(--space-3);
    padding-bottom: calc(56px + var(--space-3));
  }

  .header {
    padding: 0 var(--space-3);
  }
}

/* ── Landing page (no sidebar) layout ──────────────────── */
.landing-layout {
  padding-top: var(--header-height);
}

.landing-layout .main-content {
  margin-left: 0;
}

/* ── Page grid ─────────────────────────────────────────── */
.page-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-6);
}

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

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

/* ── Section spacing ───────────────────────────────────── */
.section {
  padding: var(--space-16) 0;
}

.section--sm {
  padding: var(--space-8) 0;
}

.section__title {
  margin-bottom: var(--space-8);
  font-size: var(--text-3xl);
}

.section__subtitle {
  margin-bottom: var(--space-6);
  color: var(--color-text-secondary);
  font-size: var(--text-lg);
  max-width: 600px;
}