/* ============================================================
   LAYOUT — Header, Navigation, Drawer, Viewport, Grids & Responsive
   Strictly complies with <= 350 lines limit
   ============================================================ */

/* ── Context Bar / App Header ──────────────────────────────── */
.context-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.85rem 2rem;
    background: var(--bg-header);
    color: var(--header-text);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: var(--shadow-header);
}

.context-brand { display: flex; align-items: center; gap: 0.75rem; }
.logo-icon { font-size: 1.6rem; }

.brand-title {
    font-family: var(--font-heading);
    font-size: 1.25rem;
    font-weight: 600;
    display: block;
    line-height: 1.2;
    color: var(--text-primary);
}

.brand-subtitle {
    font-size: 0.75rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.brand-logo-wrap {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 38px;
    height: 38px;
    border-radius: var(--radius-sm);
    background: var(--tenant-primary-light);
    padding: 2px;
    overflow: hidden;
}

.brand-logo-img { width: 100%; height: 100%; object-fit: contain; }

/* ── Tenant Switcher & User Status ─────────────────────────── */
.tenant-switcher {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    background: var(--bg-main);
    padding: 0.4rem 0.85rem;
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
}

.tenant-switcher label {
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    gap: 0.4rem;
}

.tenant-switcher select { background: var(--bg-card); color: var(--text-primary); border-color: var(--border-color); }
.user-status-bar { display: flex; align-items: center; gap: 1rem; }

.user-status-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.35rem 0.85rem;
    border-radius: 20px;
    font-size: 0.82rem;
    font-weight: 600;
    background: var(--tenant-primary-light);
    color: var(--tenant-primary);
    border: 1px solid var(--tenant-primary-border);
}

.theme-toggle-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    background: var(--bg-main);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 0.4rem 0.8rem;
    border-radius: var(--radius-md);
    font-size: 0.85rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
}
.theme-toggle-btn:hover { background: var(--tenant-primary-light); color: var(--tenant-primary); border-color: var(--tenant-primary-border); }

/* ── Top Announcement Bar ─────────────────────────────────── */
.top-header-bar {
    background: var(--primary-gradient);
    color: #ffffff;
    font-size: 0.78rem;
    font-weight: 500;
    padding: 0.35rem 1.5rem;
    box-shadow: 0 1px 3px rgba(0,0,0,0.06);
}

.top-bar-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1400px;
    margin: 0 auto;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.top-bar-info { display: flex; align-items: center; gap: 0.6rem; flex-wrap: wrap; }
.dot-separator { opacity: 0.6; }

/* ── Main Viewport & Navigation ────────────────────────────── */
.app-viewport { max-width: 1400px; margin: 1.75rem auto; padding: 0 1.75rem; }

.page-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--border-color);
}

.page-title {
    font-family: var(--font-heading);
    font-size: 1.55rem;
    font-weight: 700;
    color: var(--text-primary);
}

.page-subtitle { font-size: 0.88rem; color: var(--text-secondary); }

.school-nav {
    display: flex;
    gap: 0.5rem;
    background: #FFFFFF;
    padding: 0.5rem;
    border-radius: 14px;
    border: 1px solid var(--border-color);
    margin-bottom: 1.75rem;
    overflow-x: auto;
    box-shadow: var(--shadow-card);
}

.nav-item {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    padding: 0.65rem 1.15rem;
    border-radius: 10px;
    font-weight: 500;
    font-size: 13.5px;
    cursor: pointer;
    white-space: nowrap;
    transition: all 0.2s ease;
}
.nav-item:hover { color: var(--tenant-primary); background: var(--tenant-primary-light); }
.nav-item.active { background: var(--tenant-primary); color: #ffffff; font-weight: 600; box-shadow: 0 4px 12px rgba(115, 102, 255, 0.25); }

.tab-title-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid var(--border-subtle);
}
.tab-title-bar h3 { font-size: 1.05rem; font-weight: 600; color: var(--text-primary); }

/* ── Hamburger Drawer Navigation ──────────────────────────── */
.hamburger-btn {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 0.5rem 0.85rem;
    border-radius: var(--radius-sm);
    font-weight: 500;
    font-size: 0.9rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 0.4rem;
    transition: all 0.2s ease;
}
.hamburger-btn:hover { background: var(--tenant-primary-light); color: var(--tenant-primary); border-color: var(--tenant-primary-border); }

.hamburger-backdrop {
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(8, 21, 66, 0.35);
    backdrop-filter: blur(2px);
    z-index: 1040;
    display: none;
}
.hamburger-backdrop.active { display: block; }

.hamburger-drawer {
    position: fixed;
    top: 0;
    left: -300px;
    width: 280px;
    height: 100vh;
    background: #FFFFFF;
    border-right: 1px solid var(--border-color);
    box-shadow: 0 0 20px rgba(89, 102, 122, 0.1);
    z-index: 1050;
    transition: left 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    display: flex;
    flex-direction: column;
    padding: 1.25rem 1rem;
}
.hamburger-drawer.open { left: 0; }

.drawer-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-bottom: 1rem;
    margin-bottom: 1rem;
    border-bottom: 1px solid var(--border-subtle);
}

.drawer-menu-list { display: flex; flex-direction: column; gap: 0.4rem; overflow-y: auto; }

.drawer-item {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    padding: 0.65rem 0.85rem;
    border-radius: var(--radius-sm);
    text-align: left;
    font-weight: 500;
    font-size: 0.9rem;
    cursor: pointer;
    transition: all 0.15s ease;
    display: flex;
    align-items: center;
    gap: 0.6rem;
}
.drawer-item:hover { background: var(--tenant-primary-light); color: var(--tenant-primary); }
.drawer-item.active { background: var(--tenant-primary); color: #ffffff; font-weight: 600; box-shadow: 0 4px 12px rgba(115, 102, 255, 0.3); }

/* ── Admin Tabs & Platform View ────────────────────────────── */
.admin-tabs {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 1.25rem;
    border-bottom: 2px solid var(--border-color);
    padding-bottom: 0.35rem;
    overflow-x: auto;
}

.tab-btn {
    background: transparent;
    border: none;
    padding: 0.55rem 1rem;
    font-size: 0.88rem;
    font-weight: 600;
    color: var(--text-secondary);
    border-radius: var(--radius-sm) var(--radius-sm) 0 0;
    cursor: pointer;
    transition: all 0.2s ease;
    white-space: nowrap;
}
.tab-btn:hover { color: var(--tenant-primary); background: var(--tenant-primary-light); }
.tab-btn.active { color: #ffffff; background: var(--tenant-primary); }

/* ── Stats Grid ────────────────────────────────────────────── */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 1.5rem;
    margin-bottom: 1.75rem;
}

.stat-card {
    display: flex;
    align-items: center;
    gap: 1.25rem;
    background: #FFFFFF;
    border-radius: 16px;
    padding: 1.5rem 1.65rem;
    box-shadow: var(--shadow-card);
    border: 1px solid var(--border-widget-light, #EFEEFF);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}
.stat-card:hover {
    box-shadow: var(--shadow-card-hover);
    transform: translateY(-2px);
}

.stat-icon {
    width: 56px;
    height: 56px;
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    flex-shrink: 0;
}
.stat-icon.purple { background: #E8E5FF; color: #7366FF; }
.stat-icon.green  { background: #DCF1DA; color: #65C15C; }
.stat-icon.blue   { background: #D5F5FE; color: #40B8F5; }
.stat-icon.orange, .stat-icon.amber { background: #FFF7E5; color: #FFB829; }
.stat-icon.red, .stat-icon.rose     { background: #FFE8E6; color: #FC564A; }

.stat-value { font-size: 1.6rem; font-weight: 700; line-height: 1.2; color: var(--text-primary); font-family: var(--font-heading); }
.stat-label { font-size: 0.82rem; color: var(--text-secondary); font-weight: 500; }

/* ── Responsive Viewport Adjustments ───────────────────────── */
@media (max-width: 1024px) {
    .app-viewport { padding: 0 1.25rem; margin: 1.25rem auto; }
}

@media (max-width: 900px) {
    .context-bar { padding: 0.75rem 1rem; }
    .stats-grid { grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); }
}

@media (max-width: 640px) {
    .context-bar { padding: 0.6rem 0.75rem; flex-wrap: wrap; gap: 0.5rem; }
    .tenant-switcher label { display: none; }
    .app-viewport { padding: 0 0.75rem; margin: 0.85rem auto; }
    .page-header { flex-direction: column; align-items: flex-start; gap: 0.5rem; }
    .top-header-bar { font-size: 0.72rem; padding: 0.35rem 0.75rem; }
}