/* ============================================
   W3 Dashboard - Layout
   Grid, Sidebar, Topbar, Responsive
   ============================================ */

/* ---- Reset ---- */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

body {
    font-family: var(--font-sans);
    background: var(--bg-page);
    color: var(--text-primary);
    line-height: 1.6;
    height: 100vh;
    overflow: hidden;
}

/* ---- App Grid ---- */
/* In RTL, CSS Grid flips columns. 260px goes to RIGHT, 1fr to LEFT. */
.app-layout {
    display: grid;
    grid-template-columns: 260px 1fr;
    grid-template-rows: 56px 1fr;
    grid-template-areas:
        "sidebar topbar"
        "sidebar content";
    height: 100vh;
}

.sidebar { grid-area: sidebar; }
.topbar  { grid-area: topbar; }
.content { grid-area: content; overflow-y: auto; padding: var(--space-8); }

/* ---- Sidebar ---- */
.sidebar {
    background: var(--bg-sidebar);
    border-inline-end: 1px solid rgba(255,255,255,0.06);
    display: flex;
    flex-direction: column;
    overflow-y: auto;
}

.sidebar-brand {
    padding: var(--space-6) var(--space-5);
    border-bottom: 1px solid rgba(255,255,255,0.06);
    display: flex;
    align-items: center;
    gap: var(--space-3);
}

.sidebar-brand-icon {
    width: 36px; height: 36px;
    background: var(--accent-primary);
    border-radius: var(--radius-md);
    display: flex; align-items: center; justify-content: center;
    color: white; font-weight: 700; font-size: var(--text-sm);
    flex-shrink: 0;
}

.sidebar-brand-text {
    color: var(--text-on-dark);
    font-weight: 600;
    font-size: var(--text-base);
}

.sidebar-brand-sub {
    color: var(--text-on-dark-dim);
    font-size: var(--text-xs);
}

.sidebar-section {
    padding: var(--space-4) var(--space-3);
}

.sidebar-section-label {
    font-size: 0.65rem;
    font-weight: 600;
    color: var(--text-on-dark-dim);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    padding: 0 var(--space-3);
    margin-bottom: var(--space-2);
}

.sidebar-item {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-2) var(--space-3);
    border-radius: var(--radius-md);
    color: var(--text-on-dark-dim);
    font-size: var(--text-sm);
    font-weight: 500;
    cursor: pointer;
    transition: all 0.15s;
    text-decoration: none;
    margin-bottom: 2px;
    position: relative;
}

.sidebar-item:hover {
    background: var(--bg-sidebar-hover);
    color: var(--text-on-dark);
}

.sidebar-item.active {
    background: var(--bg-sidebar-active);
    color: #60A5FA;
}

.sidebar-item.active::before {
    content: '';
    position: absolute;
    inset-inline-start: 0;
    top: 6px; bottom: 6px;
    width: 3px;
    background: #60A5FA;
    border-radius: 3px;
}

.sidebar-item svg {
    width: 18px; height: 18px;
    flex-shrink: 0;
    opacity: 0.7;
}

.sidebar-item.active svg { opacity: 1; }

.sidebar-spacer { flex: 1; }

.sidebar-user {
    padding: var(--space-4) var(--space-5);
    border-top: 1px solid rgba(255,255,255,0.06);
    display: flex;
    align-items: center;
    gap: var(--space-3);
}

.sidebar-user-avatar {
    width: 32px; height: 32px;
    background: #374151;
    border-radius: var(--radius-full);
    display: flex; align-items: center; justify-content: center;
    color: #9CA3AF; font-size: var(--text-xs); font-weight: 600;
    flex-shrink: 0;
}

.sidebar-user-name {
    color: var(--text-on-dark);
    font-size: var(--text-sm);
    font-weight: 500;
}

.sidebar-user-role {
    color: var(--text-on-dark-dim);
    font-size: var(--text-xs);
}

.sidebar-logout {
    background: none;
    border: none;
    color: var(--text-on-dark-dim);
    cursor: pointer;
    padding: var(--space-1);
    border-radius: var(--radius-sm);
    transition: color 0.15s;
    margin-inline-start: auto;
}

.sidebar-logout:hover { color: var(--error); }
.sidebar-logout svg { width: 16px; height: 16px; }

/* ---- Topbar ---- */
.topbar {
    background: var(--bg-surface);
    border-bottom: 1px solid var(--border-primary);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 var(--space-6);
}

.topbar-breadcrumb {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    font-size: var(--text-sm);
    color: var(--text-secondary);
}

.topbar-breadcrumb span { color: var(--text-tertiary); }
.topbar-breadcrumb strong { color: var(--text-primary); font-weight: 600; }

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

.topbar-btn {
    background: none;
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-md);
    padding: var(--space-2) var(--space-3);
    color: var(--text-secondary);
    cursor: pointer;
    font-size: var(--text-sm);
    display: flex;
    align-items: center;
    gap: var(--space-2);
    transition: all 0.15s;
    font-family: var(--font-sans);
}

.topbar-btn:hover {
    background: var(--bg-surface-alt);
    color: var(--text-primary);
    border-color: var(--text-tertiary);
}

.topbar-btn svg { width: 16px; height: 16px; }

.topbar-user-menu { position: relative; }
.topbar-dropdown {
    display: none;
    position: absolute;
    top: calc(100% + var(--space-2));
    left: 0;
    min-width: 220px;
    background: var(--bg-surface);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-lg);
    box-shadow: 0 8px 24px rgba(0,0,0,0.12);
    z-index: 999;
    overflow: hidden;
}
.topbar-dropdown.open { display: block; }
.topbar-dropdown-header {
    padding: var(--space-3) var(--space-4);
    border-bottom: 1px solid var(--border-primary);
    font-size: var(--text-sm);
    color: var(--text-secondary);
    direction: rtl;
}
.topbar-dropdown-header strong { color: var(--text-primary); display: block; margin-bottom: 2px; }
.topbar-dropdown-item {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-4);
    font-size: var(--text-sm);
    color: var(--text-secondary);
    cursor: pointer;
    transition: background 0.1s;
    direction: rtl;
    text-decoration: none;
}
.topbar-dropdown-item:hover { background: var(--bg-surface-alt); color: var(--text-primary); }

.notif-badge {
    background: var(--error);
    color: white;
    font-size: 0.6rem;
    font-weight: 700;
    min-width: 16px; height: 16px;
    border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
}

/* ---- Two-Column Layouts ---- */
.two-col {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-6);
    margin-bottom: var(--space-6);
}

.two-col-60-40 {
    display: grid;
    grid-template-columns: 3fr 2fr;
    gap: var(--space-6);
    margin-bottom: var(--space-6);
}

/* ---- Page Section Routing ---- */
.page-section { display: none; }
.page-section.active { display: block; }

/* ---- Page Header ---- */
.page-header {
    margin-bottom: var(--space-8);
}

.page-header-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--space-8);
}

.page-title {
    font-size: var(--text-2xl);
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--space-1);
}

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

/* ---- Responsive ---- */
@media (max-width: 1024px) {
    .two-col, .two-col-60-40 {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .app-layout {
        grid-template-columns: 1fr;
        grid-template-areas:
            "topbar"
            "content";
    }
    .sidebar { display: none; }
    .content { padding: var(--space-4); }
}