/*
 * ═══════════════════════════════════════════════════════
 *  LAYOUT — App Shell, Sidebar, Header, Grid
 * ═══════════════════════════════════════════════════════
 */

/* ─── App Shell ──────────────────────────────────────── */
.app-shell {
    display: flex;
    min-height: 100vh;
}

/* ─── Sidebar ────────────────────────────────────────── */
.sidebar {
    width: var(--sidebar-width);
    background: var(--color-bg-primary);
    border-right: 1px solid var(--color-border);
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    z-index: 100;
    transition: transform var(--transition-normal);
}

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

.sidebar-brand .brand-icon {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-md);
    background: linear-gradient(135deg, var(--color-brand-dark), var(--color-brand));
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.2rem;
    font-weight: 700;
    flex-shrink: 0;
}

.sidebar-brand .brand-text {
    font-size: var(--text-sm);
    font-weight: 600;
    color: var(--color-text-primary);
    line-height: 1.3;
}

.sidebar-brand .brand-sub {
    font-size: var(--text-xs);
    color: var(--color-text-tertiary);
    font-weight: 400;
}

.sidebar-nav {
    flex: 1;
    padding: var(--space-4);
    overflow-y: auto;
}

.nav-section {
    margin-bottom: var(--space-5);
}

.nav-section-label {
    font-size: var(--text-xs);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--color-text-tertiary);
    padding: var(--space-2) var(--space-3);
    margin-bottom: var(--space-1);
}

.nav-link {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-3) var(--space-3);
    border-radius: var(--radius-md);
    font-size: var(--text-sm);
    font-weight: 500;
    color: var(--color-text-secondary);
    transition: all var(--transition-fast);
    text-decoration: none;
    position: relative;
}

.nav-link:hover {
    background: var(--color-bg-secondary);
    color: var(--color-text-primary);
}

.nav-link.active {
    background: var(--color-brand-glow);
    color: var(--color-brand-light);
}

.nav-link.active::before {
    content: '';
    position: absolute;
    left: -16px;
    top: 50%;
    transform: translateY(-50%);
    width: 3px;
    height: 24px;
    background: var(--color-brand);
    border-radius: 0 2px 2px 0;
}

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

.nav-link.active .nav-icon {
    opacity: 1;
}

.nav-badge {
    margin-left: auto;
    background: var(--color-error);
    color: white;
    font-size: 11px;
    font-weight: 700;
    min-width: 20px;
    height: 20px;
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0 6px;
}

/* Sidebar footer */
.sidebar-footer {
    padding: var(--space-4);
    border-top: 1px solid var(--color-border);
}

.sidebar-user {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-3);
    border-radius: var(--radius-md);
    transition: background var(--transition-fast);
}

.sidebar-user:hover {
    background: var(--color-bg-secondary);
}

.sidebar-user .user-avatar {
    width: 36px;
    height: 36px;
    border-radius: var(--radius-full);
    background: linear-gradient(135deg, var(--color-brand-dark), var(--color-brand));
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 600;
    font-size: var(--text-sm);
    flex-shrink: 0;
}

.sidebar-user .user-info {
    flex: 1;
    min-width: 0;
}

.sidebar-user .user-name {
    font-size: var(--text-sm);
    font-weight: 500;
    color: var(--color-text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

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

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

/* ─── Top Header Bar ─────────────────────────────────── */
.top-bar {
    height: var(--header-height);
    background: var(--color-bg-glass);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--color-border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 var(--space-8);
    position: sticky;
    top: 0;
    z-index: 50;
}

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

.page-title {
    font-size: var(--text-xl);
    font-weight: 600;
}

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

.breadcrumb a {
    color: var(--color-text-tertiary);
}

.breadcrumb a:hover {
    color: var(--color-brand);
}

.breadcrumb .separator {
    opacity: 0.4;
}

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

/* ─── Search Bar (in top bar) ────────────────────────── */
.search-wrapper {
    position: relative;
    width: 320px;
}

.search-input {
    width: 100%;
    padding: var(--space-2) var(--space-4) var(--space-2) var(--space-10);
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-full);
    color: var(--color-text-primary);
    font-size: var(--text-sm);
    outline: none;
    transition: all var(--transition-fast);
}

.search-input:focus {
    border-color: var(--color-brand);
    box-shadow: 0 0 0 3px var(--color-brand-glow);
    width: 400px;
}

.search-icon {
    position: absolute;
    left: var(--space-4);
    top: 50%;
    transform: translateY(-50%);
    color: var(--color-text-tertiary);
    pointer-events: none;
}

.search-shortcut {
    position: absolute;
    right: var(--space-3);
    top: 50%;
    transform: translateY(-50%);
    padding: 2px 6px;
    font-size: 11px;
    background: var(--color-bg-tertiary);
    border-radius: var(--radius-sm);
    color: var(--color-text-tertiary);
    font-family: var(--font-mono);
}

/* ─── Page Container ─────────────────────────────────── */
.page-content {
    padding: var(--space-8);
    max-width: var(--container-max);
    margin: 0 auto;
}

/* ─── Grid Layouts ───────────────────────────────────── */
.grid-2 {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-6);
}

.grid-3 {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-6);
}

.grid-4 {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-6);
}

.grid-auto {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: var(--space-6);
}

/* ─── Section Spacing ────────────────────────────────── */
.section {
    margin-bottom: var(--space-8);
}

.section-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--space-5);
}

.section-header h2 {
    font-size: var(--text-xl);
}

/* ─── Theme Toggle ───────────────────────────────────── */
.theme-toggle {
    width: 36px;
    height: 36px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    background: var(--color-bg-secondary);
    color: var(--color-text-secondary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
}

.theme-toggle:hover {
    background: var(--color-bg-tertiary);
    color: var(--color-text-primary);
}

/* ─── Mobile Menu Toggle ─────────────────────────────── */
.menu-toggle {
    display: none;
    width: 40px;
    height: 40px;
    border: none;
    background: none;
    color: var(--color-text-primary);
    cursor: pointer;
    font-size: 1.5rem;
}

/* ─── Responsive ─────────────────────────────────────── */
@media (max-width: 1024px) {
    .grid-4 { grid-template-columns: repeat(2, 1fr); }
    .grid-3 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
    .sidebar {
        transform: translateX(-100%);
    }

    .sidebar.open {
        transform: translateX(0);
        box-shadow: var(--shadow-lg);
    }

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

    .menu-toggle {
        display: flex;
        align-items: center;
        justify-content: center;
    }

    .top-bar {
        padding: 0 var(--space-4);
    }

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

    .search-wrapper {
        display: none;
    }

    .grid-2,
    .grid-3,
    .grid-4 {
        grid-template-columns: 1fr;
    }

    .form-row {
        grid-template-columns: 1fr;
    }

    .search-input:focus {
        width: 100%;
    }
}

/* ─── Login Page Layout ──────────────────────────────── */
.login-page {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    background: var(--color-bg-root);
    padding: var(--space-4);
}

.login-card {
    width: 100%;
    max-width: 420px;
    text-align: center;
}

.login-card .brand-icon {
    width: 64px;
    height: 64px;
    border-radius: var(--radius-lg);
    background: linear-gradient(135deg, var(--color-brand-dark), var(--color-brand));
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.5rem;
    font-weight: 700;
    margin: 0 auto var(--space-5);
}

.login-card h1 {
    margin-bottom: var(--space-2);
}

.login-card .login-subtitle {
    color: var(--color-text-tertiary);
    margin-bottom: var(--space-8);
}

.login-card .form-group {
    text-align: left;
}

/* ─── Public Page Layout ─────────────────────────────── */
.public-page {
    min-height: 100vh;
    background: var(--color-bg-root);
}

.public-header {
    background: linear-gradient(135deg, var(--color-bg-primary), var(--color-bg-secondary));
    border-bottom: 1px solid var(--color-border);
    padding: var(--space-12) var(--space-8);
    text-align: center;
}

.public-header h1 {
    font-size: var(--text-3xl);
    margin-bottom: var(--space-3);
}

.public-header .public-intro {
    color: var(--color-text-secondary);
    max-width: 600px;
    margin: 0 auto;
    font-size: var(--text-lg);
}

.public-content {
    max-width: 900px;
    margin: 0 auto;
    padding: var(--space-8);
}

.public-issue-card {
    margin-bottom: var(--space-5);
    transition: transform var(--transition-normal);
}

.public-issue-card:hover {
    transform: translateY(-2px);
}

.public-footer {
    text-align: center;
    padding: var(--space-8);
    color: var(--color-text-tertiary);
    font-size: var(--text-sm);
    border-top: 1px solid var(--color-border);
}