/* ============================================
   StockFlow - Advanced Inventory Management
   Master Stylesheet with Dark/Light Themes
   ============================================ */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&display=swap');

/* ========== DARK THEME (default) ========== */
:root,
[data-theme="dark"] {
    /* Primary Palette */
    --primary: #6366f1;
    --primary-dark: #4f46e5;
    --primary-light: #818cf8;
    --primary-glow: rgba(99, 102, 241, 0.15);

    /* Accent */
    --accent: #06b6d4;
    --accent-dark: #0891b2;

    /* Semantic */
    --success: #10b981;
    --warning: #f59e0b;
    --danger: #ef4444;
    --info: #3b82f6;

    /* Neutrals — Dark */
    --bg-body: #0f172a;
    --bg-sidebar: #1e293b;
    --bg-card: #1e293b;
    --bg-card-hover: #334155;
    --bg-input: #0f172a;
    --border-color: #334155;
    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;

    /* Login */
    --login-bg-start: #0f172a;
    --login-bg-mid: #1e1b4b;
    --login-bg-end: #0f172a;
    --login-card-bg: rgba(30, 41, 59, 0.8);
    --login-card-border: rgba(99, 102, 241, 0.2);

    /* Sidebar */
    --sidebar-width: 260px;
    --sidebar-collapsed: 70px;

    /* Misc */
    --radius: 12px;
    --radius-sm: 8px;
    --radius-lg: 16px;
    --shadow: 0 4px 6px -1px rgba(0,0,0,0.3), 0 2px 4px -2px rgba(0,0,0,0.2);
    --shadow-lg: 0 10px 25px -3px rgba(0,0,0,0.4);
    --transition: all 0.25s ease;
    --table-head-bg: rgba(15, 23, 42, 0.5);
    --table-row-hover: rgba(99, 102, 241, 0.04);
}

/* ========== LIGHT THEME ========== */
[data-theme="light"] {
    --bg-body: #f1f5f9;
    --bg-sidebar: #ffffff;
    --bg-card: #ffffff;
    --bg-card-hover: #f8fafc;
    --bg-input: #f8fafc;
    --border-color: #e2e8f0;
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-muted: #94a3b8;

    --login-bg-start: #e0e7ff;
    --login-bg-mid: #c7d2fe;
    --login-bg-end: #e0e7ff;
    --login-card-bg: rgba(255, 255, 255, 0.9);
    --login-card-border: rgba(99, 102, 241, 0.15);

    --shadow: 0 1px 3px rgba(0,0,0,0.08), 0 1px 2px rgba(0,0,0,0.06);
    --shadow-lg: 0 4px 14px rgba(0,0,0,0.1);
    --table-head-bg: #f8fafc;
    --table-row-hover: rgba(99, 102, 241, 0.03);
}

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

html {
    font-size: 14px;
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg-body);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    transition: background 0.3s ease, color 0.3s ease;
}

a {
    color: var(--primary-light);
    text-decoration: none;
    transition: var(--transition);
}
a:hover {
    color: var(--primary);
}

[data-theme="light"] a {
    color: var(--primary);
}
[data-theme="light"] a:hover {
    color: var(--primary-dark);
}

/* Prevent light-mode link color from bleeding into colored buttons */
[data-theme="light"] a.btn-primary,
[data-theme="light"] a.btn-primary:hover,
[data-theme="light"] a.btn-success,
[data-theme="light"] a.btn-success:hover,
[data-theme="light"] a.btn-danger,
[data-theme="light"] a.btn-danger:hover,
[data-theme="light"] a.btn-warning,
[data-theme="light"] a.btn-warning:hover { color: #fff; }

[data-theme="light"] a.btn-outline { color: var(--text-secondary); }
[data-theme="light"] a.btn-outline:hover { color: var(--text-primary); }

/* ========== Login Page ========== */
.login-wrapper {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--login-bg-start) 0%, var(--login-bg-mid) 50%, var(--login-bg-end) 100%);
    position: relative;
    overflow: hidden;
}

.login-wrapper::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle at 30% 40%, rgba(99, 102, 241, 0.08) 0%, transparent 50%),
                radial-gradient(circle at 70% 60%, rgba(6, 182, 212, 0.06) 0%, transparent 50%);
    animation: bgPulse 15s ease-in-out infinite alternate;
}

@keyframes bgPulse {
    0% { transform: translate(0, 0) scale(1); }
    100% { transform: translate(-5%, -5%) scale(1.1); }
}

/* Inventory-themed floating background elements */
.login-bg-elements {
    position: absolute;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    pointer-events: none;
    z-index: 0;
    overflow: hidden;
}

.login-bg-elements .bg-icon {
    position: absolute;
    opacity: 0.15;
    font-size: 4rem;
    animation: float 20s ease-in-out infinite;
}

[data-theme="light"] .login-bg-elements .bg-icon {
    opacity: 0.2;
}

.login-bg-elements .bg-icon:nth-child(1)  { top: 8%; left: 5%; animation-delay: 0s; font-size:3rem; }
.login-bg-elements .bg-icon:nth-child(2)  { top: 15%; right: 10%; animation-delay: 2s; font-size:5rem; }
.login-bg-elements .bg-icon:nth-child(3)  { bottom: 20%; left: 8%; animation-delay: 4s; font-size:4rem; }
.login-bg-elements .bg-icon:nth-child(4)  { bottom: 10%; right: 5%; animation-delay: 6s; font-size:6rem; }
.login-bg-elements .bg-icon:nth-child(5)  { top: 50%; left: 15%; animation-delay: 8s; font-size:3.5rem; }
.login-bg-elements .bg-icon:nth-child(6)  { top: 30%; right: 20%; animation-delay: 10s; font-size:4.5rem; }
.login-bg-elements .bg-icon:nth-child(7)  { bottom: 40%; left: 25%; animation-delay: 3s; font-size:3rem; }
.login-bg-elements .bg-icon:nth-child(8)  { top: 70%; right: 15%; animation-delay: 7s; font-size:5rem; }
.login-bg-elements .bg-icon:nth-child(9)  { top: 5%; left: 40%; animation-delay: 5s; font-size:2.5rem; }
.login-bg-elements .bg-icon:nth-child(10) { bottom: 5%; left: 50%; animation-delay: 9s; font-size:3.5rem; }
.login-bg-elements .bg-icon:nth-child(11) { top: 40%; left: 70%; animation-delay: 1s; font-size:4rem; }
.login-bg-elements .bg-icon:nth-child(12) { bottom: 30%; right: 35%; animation-delay: 11s; font-size:3rem; }

@keyframes float {
    0%, 100% { transform: translateY(0) rotate(0deg); }
    25% { transform: translateY(-20px) rotate(5deg); }
    50% { transform: translateY(-10px) rotate(-3deg); }
    75% { transform: translateY(-25px) rotate(3deg); }
}

/* Grid pattern background for login */
.login-grid-pattern {
    position: absolute;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    z-index: 0;
    background-image:
        linear-gradient(rgba(99, 102, 241, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(99, 102, 241, 0.03) 1px, transparent 1px);
    background-size: 60px 60px;
}

[data-theme="light"] .login-grid-pattern {
    background-image:
        linear-gradient(rgba(99, 102, 241, 0.06) 1px, transparent 1px),
        linear-gradient(90deg, rgba(99, 102, 241, 0.06) 1px, transparent 1px);
}

.login-card {
    background: var(--login-card-bg);
    backdrop-filter: blur(20px);
    border: 1px solid var(--login-card-border);
    border-radius: var(--radius-lg);
    padding: 3rem;
    width: 100%;
    max-width: 420px;
    position: relative;
    z-index: 1;
    box-shadow: var(--shadow-lg);
}

.login-card .logo {
    text-align: center;
    margin-bottom: 2rem;
}

.login-card .logo img {
    width: 64px;
    height: 64px;
    margin-bottom: 0.75rem;
    border-radius: 14px;
}

.login-card .logo h1 {
    font-size: 2rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--primary-light), var(--accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.login-card .logo p {
    color: var(--text-secondary);
    font-size: 0.85rem;
    margin-top: 0.25rem;
}

.login-card .logo .tagline {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: 0.35rem;
    letter-spacing: 0.05em;
}

/* Login Feature Pills */
.login-features {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    justify-content: center;
    margin-bottom: 1.75rem;
}

.login-features .pill {
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
    padding: 0.3rem 0.65rem;
    border-radius: 20px;
    font-size: 0.7rem;
    font-weight: 500;
    color: var(--text-muted);
    border: 1px solid var(--border-color);
    background: var(--bg-input);
}

.login-features .pill svg,
.login-features .pill i {
    width: 12px;
    height: 12px;
}

/* ========== Layout ========== */
.app-layout {
    display: flex;
    min-height: 100vh;
}

/* ========== Sidebar ========== */
.sidebar {
    width: var(--sidebar-width);
    height: 100vh;
    position: fixed;
    top: 0;
    left: 0;
    z-index: 1000;
    background: var(--bg-sidebar);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    transition: var(--transition);
    overflow-y: auto;
    overflow-x: hidden;
}

.sidebar-header {
    padding: 1.5rem 1.25rem;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    gap: 0.75rem;
    flex-shrink: 0;
}

.sidebar-header .brand {
    font-size: 1.35rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--primary-light), var(--accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.sidebar-header .version {
    font-size: 0.65rem;
    color: var(--text-muted);
    background: var(--bg-body);
    padding: 0.15rem 0.5rem;
    border-radius: 10px;
}

.sidebar-nav {
    flex: 1;
    padding: 1rem 0.75rem;
}

.nav-section {
    margin-bottom: 1.5rem;
}

.nav-section-title {
    font-size: 0.65rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--text-muted);
    padding: 0 0.75rem;
    margin-bottom: 0.5rem;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.65rem 0.75rem;
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    font-size: 0.9rem;
    font-weight: 500;
    transition: var(--transition);
    margin-bottom: 2px;
}

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

.nav-link.active {
    background: var(--primary-glow);
    color: var(--primary-light);
    font-weight: 600;
}

[data-theme="light"] .nav-link.active {
    color: var(--primary);
}

.nav-link .icon {
    font-size: 1.15rem;
    width: 24px;
    text-align: center;
    flex-shrink: 0;
}

.nav-link .badge {
    margin-left: auto;
    font-size: 0.65rem;
    padding: 0.15rem 0.5rem;
    border-radius: 10px;
    background: var(--danger);
    color: #fff;
    font-weight: 600;
}

/* Sidebar footer */
.sidebar-footer {
    padding: 1rem 1.25rem;
    border-top: 1px solid var(--border-color);
    flex-shrink: 0;
}

.user-card {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.user-avatar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-weight: 700;
    font-size: 0.85rem;
    flex-shrink: 0;
}

.user-info .user-name {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-primary);
}

.user-info .user-role {
    font-size: 0.7rem;
    color: var(--text-muted);
    text-transform: capitalize;
}

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

/* Top Bar */
.topbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem 2rem;
    background: var(--bg-sidebar);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(10px);
}

.topbar-left {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.topbar-left h1 {
    font-size: 1.35rem;
    font-weight: 700;
    color: var(--text-primary);
}

.breadcrumb {
    display: flex;
    list-style: none;
    gap: 0.5rem;
    font-size: 0.8rem;
    color: var(--text-muted);
}

.breadcrumb li + li::before {
    content: '/';
    margin-right: 0.5rem;
    color: var(--text-muted);
}

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

.topbar-right {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.btn-icon {
    width: 38px;
    height: 38px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-color);
    background: transparent;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition);
    font-size: 1rem;
}

.btn-icon:hover {
    background: var(--bg-card-hover);
    color: var(--text-primary);
}

.theme-toggle:hover {
    border-color: var(--warning);
    color: var(--warning);
}

#sidebarToggle {
    display: none;
}

/* Page Body */
.page-body {
    flex: 1;
    padding: 2rem;
}

/* ========== Cards ========== */
.card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    overflow: hidden;
    transition: var(--transition);
}

.card:hover {
    border-color: rgba(99, 102, 241, 0.3);
}

.card-header {
    padding: 1.25rem 1.5rem;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.card-header h3 {
    font-size: 1rem;
    font-weight: 600;
}

.card-body {
    padding: 1.5rem;
}

.card-footer {
    padding: 1rem 1.5rem;
    border-top: 1px solid var(--border-color);
    background: var(--bg-body);
}

/* ========== Stat Cards ========== */
.stat-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 1.25rem;
    margin-bottom: 2rem;
}

.stat-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    padding: 1.5rem;
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.stat-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: var(--stat-color, var(--primary));
    border-radius: 2px;
}

.stat-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow);
    border-color: rgba(99, 102, 241, 0.3);
}

.stat-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.35rem;
    flex-shrink: 0;
}

.stat-icon.primary { background: rgba(99, 102, 241, 0.15); color: var(--primary-light); }
.stat-icon.success { background: rgba(16, 185, 129, 0.15); color: var(--success); }
.stat-icon.warning { background: rgba(245, 158, 11, 0.15); color: var(--warning); }
.stat-icon.danger  { background: rgba(239, 68, 68, 0.15); color: var(--danger); }
.stat-icon.info    { background: rgba(59, 130, 246, 0.15); color: var(--info); }
.stat-icon.accent  { background: rgba(6, 182, 212, 0.15); color: var(--accent); }

[data-theme="light"] .stat-icon.primary { color: var(--primary); }

.stat-details h4 {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-muted);
    margin-bottom: 0.25rem;
}

.stat-details .stat-value {
    font-size: 1.75rem;
    font-weight: 800;
    color: var(--text-primary);
    line-height: 1.2;
}

.stat-details .stat-change {
    font-size: 0.75rem;
    color: var(--success);
    margin-top: 0.25rem;
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.stat-details .stat-change.negative { color: var(--danger); }

/* ========== Forms ========== */
.form-group {
    margin-bottom: 1.25rem;
}

.form-label {
    display: block;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

.form-control {
    width: 100%;
    padding: 0.65rem 1rem;
    background: var(--bg-input);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-family: inherit;
    font-size: 0.9rem;
    transition: var(--transition);
}

.form-control:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px var(--primary-glow);
}

.form-control::placeholder {
    color: var(--text-muted);
}

select.form-control {
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='%2394a3b8' viewBox='0 0 16 16'%3E%3Cpath d='M8 11L3 6h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 0.75rem center;
    padding-right: 2rem;
}

textarea.form-control {
    resize: vertical;
    min-height: 100px;
}

.form-check {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 0.5rem;
}

.form-text {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: 0.35rem;
}

/* ========== Buttons ========== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.6rem 1.25rem;
    border: none;
    border-radius: var(--radius-sm);
    font-family: inherit;
    font-size: 0.875rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
    line-height: 1.4;
}

.btn:hover {
    transform: translateY(-1px);
    box-shadow: var(--shadow);
}

.btn:active {
    transform: translateY(0);
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: #fff;
}
.btn-primary:hover { background: linear-gradient(135deg, var(--primary-dark), #4338ca); color:#fff; }

.btn-success {
    background: linear-gradient(135deg, var(--success), #059669);
    color: #fff;
}

.btn-danger {
    background: linear-gradient(135deg, var(--danger), #dc2626);
    color: #fff;
}

.btn-warning {
    background: linear-gradient(135deg, var(--warning), #d97706);
    color: #fff;
}

.btn-outline {
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
}
.btn-outline:hover {
    background: var(--bg-card-hover);
    color: var(--text-primary);
}

.btn-sm {
    padding: 0.35rem 0.75rem;
    font-size: 0.8rem;
}

.btn-lg {
    padding: 0.85rem 1.75rem;
    font-size: 1rem;
}

.btn-block {
    width: 100%;
    justify-content: center;
}

/* ========== Tables ========== */
.table-responsive {
    overflow-x: auto;
}

.data-table {
    width: 100%;
    border-collapse: collapse;
}

.data-table thead th {
    text-align: left;
    padding: 0.85rem 1rem;
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-muted);
    background: var(--table-head-bg);
    border-bottom: 1px solid var(--border-color);
    white-space: nowrap;
}

.data-table tbody td {
    padding: 0.85rem 1rem;
    border-bottom: 1px solid var(--border-color);
    font-size: 0.875rem;
    color: var(--text-secondary);
    vertical-align: middle;
}

.data-table tbody tr {
    transition: var(--transition);
}

.data-table tbody tr:hover {
    background: var(--table-row-hover);
}

.data-table tbody tr:last-child td {
    border-bottom: none;
}

/* ========== Badges ========== */
.badge {
    display: inline-flex;
    align-items: center;
    padding: 0.25rem 0.65rem;
    border-radius: 20px;
    font-size: 0.7rem;
    font-weight: 600;
    letter-spacing: 0.02em;
}

.badge-success { background: rgba(16, 185, 129, 0.15); color: var(--success); }
.badge-danger  { background: rgba(239, 68, 68, 0.15); color: var(--danger); }
.badge-warning { background: rgba(245, 158, 11, 0.15); color: var(--warning); }
.badge-info    { background: rgba(59, 130, 246, 0.15); color: var(--info); }
.badge-primary { background: rgba(99, 102, 241, 0.15); color: var(--primary-light); }

[data-theme="light"] .badge-primary { color: var(--primary); }

/* ========== Pagination ========== */
.pagination {
    display: flex;
    align-items: center;
    gap: 0.35rem;
    list-style: none;
    margin-top: 1.5rem;
    justify-content: center;
}

.pagination a, .pagination span {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: var(--radius-sm);
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

.pagination a:hover {
    background: var(--bg-card-hover);
    color: var(--text-primary);
}

.pagination .active span {
    background: var(--primary);
    color: #fff;
    border-color: var(--primary);
}

.pagination .disabled span {
    opacity: 0.4;
    pointer-events: none;
}

/* ========== Alerts ========== */
.alert {
    padding: 1rem 1.25rem;
    border-radius: var(--radius-sm);
    margin-bottom: 1rem;
    font-size: 0.875rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    border: 1px solid transparent;
}

.alert-success { background: rgba(16, 185, 129, 0.1); border-color: rgba(16, 185, 129, 0.3); color: var(--success); }
.alert-danger  { background: rgba(239, 68, 68, 0.1); border-color: rgba(239, 68, 68, 0.3); color: var(--danger); }
.alert-warning { background: rgba(245, 158, 11, 0.1); border-color: rgba(245, 158, 11, 0.3); color: var(--warning); }
.alert-info    { background: rgba(59, 130, 246, 0.1); border-color: rgba(59, 130, 246, 0.3); color: var(--info); }

.btn-close {
    background: none;
    border: none;
    color: inherit;
    font-size: 1.25rem;
    cursor: pointer;
    opacity: 0.6;
    line-height: 1;
}
.btn-close:hover { opacity: 1; }
.btn-close::after { content: '×'; }

/* ========== Modal ========== */
.modal-backdrop {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.6);
    backdrop-filter: blur(4px);
    z-index: 2000;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
}

.modal-backdrop.show {
    opacity: 1;
    visibility: visible;
}

.modal {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    width: 90%;
    max-width: 560px;
    max-height: 85vh;
    overflow-y: auto;
    transform: translateY(20px) scale(0.95);
    transition: var(--transition);
}

.modal-backdrop.show .modal {
    transform: translateY(0) scale(1);
}

.modal-header {
    padding: 1.25rem 1.5rem;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.modal-header h3 {
    font-size: 1.1rem;
    font-weight: 600;
}

.modal-body {
    padding: 1.5rem;
}

.modal-footer {
    padding: 1rem 1.5rem;
    border-top: 1px solid var(--border-color);
    display: flex;
    justify-content: flex-end;
    gap: 0.75rem;
}

/* ========== Empty State ========== */
.empty-state {
    text-align: center;
    padding: 4rem 2rem;
    color: var(--text-muted);
}

.empty-state .icon {
    font-size: 3rem;
    margin-bottom: 1rem;
    opacity: 0.4;
}

.empty-state h4 {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

.empty-state p {
    font-size: 0.9rem;
    max-width: 400px;
    margin: 0 auto 1.5rem;
}

/* ========== Search Bar ========== */
.search-box {
    position: relative;
    max-width: 320px;
}

.search-box input {
    width: 100%;
    padding: 0.55rem 1rem 0.55rem 2.5rem;
    background: var(--bg-input);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-size: 0.85rem;
}

.search-box input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px var(--primary-glow);
}

.search-box .search-icon {
    position: absolute;
    left: 0.75rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
    font-size: 0.9rem;
}

/* ========== Toolbar ========== */
.toolbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 1rem;
    margin-bottom: 1.25rem;
}

.toolbar-actions {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

/* ========== Row Utilities ========== */
.row {
    display: grid;
    gap: 1.25rem;
}

.row-2 { grid-template-columns: repeat(2, 1fr); }
.row-3 { grid-template-columns: repeat(3, 1fr); }
.row-4 { grid-template-columns: repeat(4, 1fr); }

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

@media (max-width: 768px) {
    .sidebar {
        transform: translateX(-100%);
    }
    .sidebar.show {
        transform: translateX(0);
    }
    .main-content {
        margin-left: 0;
    }
    #sidebarToggle {
        display: flex;
    }
    .topbar {
        padding: 0.75rem 1rem;
    }
    .page-body {
        padding: 1.25rem;
    }
    .stat-grid {
        grid-template-columns: 1fr;
    }
    .row-2, .row-3, .row-4 {
        grid-template-columns: 1fr;
    }
    .toolbar {
        flex-direction: column;
        align-items: stretch;
    }
}

/* ========== Scrollbar ========== */
::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 10px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-muted);
}

/* ========== Animations ========== */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to   { opacity: 1; transform: translateY(0); }
}

.fade-in {
    animation: fadeIn 0.4s ease forwards;
}

@keyframes slideInRight {
    from { opacity: 0; transform: translateX(20px); }
    to   { opacity: 1; transform: translateX(0); }
}

.slide-in {
    animation: slideInRight 0.3s ease forwards;
}

/* ========== Loading Spinner ========== */
.spinner {
    width: 36px;
    height: 36px;
    border: 3px solid var(--border-color);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* ========== Tooltips ========== */
[data-tooltip] {
    position: relative;
}

[data-tooltip]::after {
    content: attr(data-tooltip);
    position: absolute;
    bottom: calc(100% + 8px);
    left: 50%;
    transform: translateX(-50%);
    background: var(--bg-body);
    color: var(--text-primary);
    padding: 0.35rem 0.75rem;
    border-radius: 6px;
    font-size: 0.75rem;
    white-space: nowrap;
    border: 1px solid var(--border-color);
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    z-index: 100;
}

[data-tooltip]:hover::after {
    opacity: 1;
    visibility: visible;
}

/* ========== Code / Monospace ========== */
code {
    font-size: 0.8rem;
    padding: 0.15rem 0.4rem;
    border-radius: 4px;
    background: var(--bg-input);
    border: 1px solid var(--border-color);
    color: var(--accent);
    font-family: 'Fira Code', 'Courier New', monospace;
}