/* ==============================================================================
   Hardware Inventory & Asset Management ERP - Modern Design System
   ============================================================================== */

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

:root {
    --font-main: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    --font-mono: 'JetBrains Mono', monospace;

    /* Color Palette - Refined Slate & Indigo */
    --bg-body: #0b0f19;
    --bg-surface: #111827;
    --bg-surface-elevated: #1e293b;
    --bg-surface-hover: #26334d;
    --bg-card: rgba(17, 24, 39, 0.85);

    --border-subtle: rgba(255, 255, 255, 0.08);
    --border-medium: rgba(255, 255, 255, 0.15);
    --border-focus: #6366f1;

    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;

    /* Accent & Semantic Colors */
    --primary: #4f46e5;
    --primary-hover: #4338ca;
    --primary-light: rgba(79, 70, 229, 0.15);

    --accent: #06b6d4;
    --accent-hover: #0891b2;

    --success: #10b981;
    --success-bg: rgba(16, 185, 129, 0.12);
    --success-border: rgba(16, 185, 129, 0.3);

    --warning: #f59e0b;
    --warning-bg: rgba(245, 158, 11, 0.12);
    --warning-border: rgba(245, 158, 11, 0.3);

    --danger: #f43f5e;
    --danger-bg: rgba(244, 63, 94, 0.12);
    --danger-border: rgba(244, 63, 94, 0.3);

    --info: #0ea5e9;
    --info-bg: rgba(14, 165, 233, 0.12);
    --info-border: rgba(14, 165, 233, 0.3);

    /* Dimensions */
    --sidebar-width: 270px;
    --sidebar-collapsed-width: 72px;
    --header-height: 68px;
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --radius-full: 9999px;

    /* Shadow & Glass */
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.2);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 10px 25px -5px rgba(0, 0, 0, 0.4), 0 8px 10px -6px rgba(0, 0, 0, 0.4);
    --glass-blur: blur(12px);
    --transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
    font-family: var(--font-main);
    background-color: var(--bg-body);
    color: var(--text-primary);
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

a {
    color: var(--accent);
    text-decoration: none;
    transition: var(--transition);
}

a:hover {
    color: #38bdf8;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    color: var(--text-primary);
    font-weight: 700;
    line-height: 1.25;
}

h1 { font-size: 1.75rem; letter-spacing: -0.025em; }
h2 { font-size: 1.35rem; letter-spacing: -0.02em; }
h3 { font-size: 1.15rem; font-weight: 600; }
p { color: var(--text-secondary); }

/* Layout Structure */
.app-container {
    display: flex;
    min-height: 100vh;
    position: relative;
}

/* Sidebar */
.sidebar {
    width: var(--sidebar-width);
    background: var(--bg-surface);
    border-right: 1px solid var(--border-subtle);
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 0;
    bottom: 0;
    left: 0;
    z-index: 40;
    transition: var(--transition);
}

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

.sidebar-logo-icon {
    width: 36px;
    height: 36px;
    background: linear-gradient(135deg, #4f46e5, #06b6d4);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #ffffff;
    font-weight: 800;
    font-size: 1.1rem;
    box-shadow: 0 0 15px rgba(79, 70, 229, 0.4);
}

.sidebar-logo-text {
    font-size: 1.05rem;
    font-weight: 700;
    color: #ffffff;
    letter-spacing: -0.02em;
}

.sidebar-logo-tag {
    font-size: 0.65rem;
    font-weight: 600;
    text-transform: uppercase;
    background: rgba(79, 70, 229, 0.2);
    color: #818cf8;
    padding: 2px 6px;
    border-radius: var(--radius-sm);
    margin-left: auto;
}

.sidebar-nav {
    flex: 1;
    overflow-y: auto;
    padding: 1.25rem 1rem;
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.nav-section-title {
    font-size: 0.68rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--text-muted);
    padding: 0.75rem 0.75rem 0.35rem 0.75rem;
    margin-top: 0.5rem;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.65rem 0.85rem;
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    font-size: 0.9rem;
    font-weight: 500;
    transition: var(--transition);
}

.nav-item:hover {
    background: var(--bg-surface-elevated);
    color: var(--text-primary);
    transform: translateX(3px);
}

.nav-item.active {
    background: linear-gradient(90deg, rgba(79, 70, 229, 0.2), rgba(6, 182, 212, 0.05));
    color: #ffffff;
    border-left: 3px solid #6366f1;
    font-weight: 600;
}

.nav-item.disabled {
    opacity: 0.45;
    cursor: not-allowed;
    pointer-events: none;
}

.nav-item svg {
    width: 20px;
    height: 20px;
    flex-shrink: 0;
}

.nav-badge {
    margin-left: auto;
    font-size: 0.7rem;
    font-weight: 600;
    padding: 2px 7px;
    border-radius: var(--radius-full);
}

.sidebar-footer {
    padding: 1rem;
    border-top: 1px solid var(--border-subtle);
    background: rgba(11, 15, 25, 0.4);
}

.user-mini-card {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.5rem;
    border-radius: var(--radius-md);
    background: var(--bg-surface-elevated);
    border: 1px solid var(--border-subtle);
}

.user-avatar {
    width: 36px;
    height: 36px;
    border-radius: var(--radius-md);
    background: linear-gradient(135deg, #3b82f6, #8b5cf6);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    color: #fff;
    font-size: 0.85rem;
}

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

.user-name {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

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

/* Main Content Area */
.main-wrapper {
    margin-left: var(--sidebar-width);
    flex: 1;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    min-width: 0;
    background: var(--bg-body);
}

/* Header / Topbar */
.header {
    height: var(--header-height);
    background: rgba(17, 24, 39, 0.8);
    backdrop-filter: var(--glass-blur);
    border-bottom: 1px solid var(--border-subtle);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 2rem;
    position: sticky;
    top: 0;
    z-index: 30;
}

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

.mobile-menu-btn {
    display: none;
    background: transparent;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 0.5rem;
}

.page-breadcrumb {
    font-size: 0.85rem;
    color: var(--text-muted);
}

.page-breadcrumb strong {
    color: var(--text-primary);
}

.header-right {
    display: flex;
    align-items: center;
    gap: 1rem;
}

/* Content Body */
.content-body {
    flex: 1;
    padding: 2rem;
    max-width: 1440px;
    width: 100%;
    margin: 0 auto;
}

/* Cards */
.card {
    background: var(--bg-surface);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
    margin-bottom: 1.5rem;
    transition: var(--transition);
}

.card:hover {
    border-color: var(--border-medium);
}

.card-header {
    padding: 1.25rem 1.5rem;
    border-bottom: 1px solid var(--border-subtle);
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: rgba(255, 255, 255, 0.015);
}

.card-title {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.card-body {
    padding: 1.5rem;
}

.card-footer {
    padding: 1rem 1.5rem;
    border-top: 1px solid var(--border-subtle);
    background: rgba(255, 255, 255, 0.01);
}

/* Metrics Grid */
.metrics-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 1.25rem;
    margin-bottom: 1.5rem;
}

.metric-card {
    background: var(--bg-surface);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    padding: 1.25rem 1.5rem;
    display: flex;
    align-items: center;
    gap: 1.25rem;
    position: relative;
    overflow: hidden;
}

.metric-card::after {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 90px;
    height: 90px;
    background: radial-gradient(circle, rgba(79, 70, 229, 0.15) 0%, transparent 70%);
    pointer-events: none;
}

.metric-icon-box {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.metric-icon-box.indigo { background: rgba(79, 70, 229, 0.15); color: #818cf8; }
.metric-icon-box.emerald { background: rgba(16, 185, 129, 0.15); color: #34d399; }
.metric-icon-box.amber { background: rgba(245, 158, 11, 0.15); color: #fbbf24; }
.metric-icon-box.cyan { background: rgba(6, 182, 212, 0.15); color: #22d3ee; }
.metric-icon-box.rose { background: rgba(244, 63, 94, 0.15); color: #fb7185; }

.metric-data {
    display: flex;
    flex-direction: column;
}

.metric-label {
    font-size: 0.8rem;
    color: var(--text-muted);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.metric-value {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1.2;
}

/* Badges */
.badge {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    font-size: 0.72rem;
    font-weight: 600;
    padding: 0.25rem 0.65rem;
    border-radius: var(--radius-full);
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.badge-primary { background: rgba(79, 70, 229, 0.18); color: #818cf8; border: 1px solid rgba(79, 70, 229, 0.3); }
.badge-danger { background: rgba(244, 63, 94, 0.18); color: #fb7185; border: 1px solid rgba(244, 63, 94, 0.3); }
.badge-warning { background: rgba(245, 158, 11, 0.18); color: #fbbf24; border: 1px solid rgba(245, 158, 11, 0.3); }
.badge-info { background: rgba(6, 182, 212, 0.18); color: #22d3ee; border: 1px solid rgba(6, 182, 212, 0.3); }
.badge-success { background: rgba(16, 185, 129, 0.18); color: #34d399; border: 1px solid rgba(16, 185, 129, 0.3); }
.badge-secondary { background: rgba(148, 163, 184, 0.15); color: #94a3b8; border: 1px solid rgba(148, 163, 184, 0.25); }

/* Tables */
.table-responsive {
    overflow-x: auto;
    width: 100%;
}

.table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.875rem;
    text-align: left;
}

.table th {
    background: rgba(255, 255, 255, 0.02);
    color: var(--text-muted);
    font-weight: 600;
    text-transform: uppercase;
    font-size: 0.72rem;
    letter-spacing: 0.06em;
    padding: 0.85rem 1.25rem;
    border-bottom: 1px solid var(--border-subtle);
}

.table td {
    padding: 1rem 1.25rem;
    border-bottom: 1px solid var(--border-subtle);
    color: var(--text-secondary);
}

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

.table tr:hover td {
    background: rgba(255, 255, 255, 0.015);
    color: var(--text-primary);
}

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

.form-label {
    display: block;
    font-size: 0.825rem;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 0.4rem;
}

.form-control {
    width: 100%;
    padding: 0.65rem 1rem;
    font-size: 0.9rem;
    font-family: var(--font-main);
    color: var(--text-primary);
    background: var(--bg-surface-elevated);
    border: 1px solid var(--border-medium);
    border-radius: var(--radius-md);
    outline: none;
    transition: var(--transition);
}

.form-control:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.25);
}

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

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    font-size: 0.875rem;
    font-weight: 600;
    font-family: var(--font-main);
    padding: 0.65rem 1.25rem;
    border-radius: var(--radius-md);
    border: 1px solid transparent;
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
}

.btn-primary {
    background: linear-gradient(135deg, #4f46e5, #4338ca);
    color: #ffffff;
    box-shadow: 0 2px 10px rgba(79, 70, 229, 0.3);
}

.btn-primary:hover {
    background: linear-gradient(135deg, #4338ca, #3730a3);
    color: #ffffff;
    box-shadow: 0 4px 15px rgba(79, 70, 229, 0.4);
}

.btn-secondary {
    background: var(--bg-surface-elevated);
    color: var(--text-primary);
    border-color: var(--border-medium);
}

.btn-secondary:hover {
    background: var(--bg-surface-hover);
    border-color: var(--border-medium);
    color: #ffffff;
}

.btn-danger {
    background: var(--danger-bg);
    color: var(--danger);
    border-color: var(--danger-border);
}

.btn-danger:hover {
    background: var(--danger);
    color: #ffffff;
}

.btn-sm {
    padding: 0.4rem 0.75rem;
    font-size: 0.78rem;
    border-radius: var(--radius-sm);
}

.btn-block {
    width: 100%;
}

/* Alerts */
.alert {
    padding: 1rem 1.25rem;
    border-radius: var(--radius-md);
    margin-bottom: 1.25rem;
    font-size: 0.875rem;
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    border: 1px solid transparent;
}

.alert-success { background: var(--success-bg); color: #34d399; border-color: var(--success-border); }
.alert-error { background: var(--danger-bg); color: #fb7185; border-color: var(--danger-border); }
.alert-warning { background: var(--warning-bg); color: #fbbf24; border-color: var(--warning-border); }
.alert-info { background: var(--info-bg); color: #38bdf8; border-color: var(--info-border); }

/* Auth Layout Page */
.auth-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1.5rem;
    background: radial-gradient(ellipse at top, #1e1b4b 0%, #0b0f19 70%);
}

.auth-card {
    width: 100%;
    max-width: 440px;
    background: rgba(17, 24, 39, 0.9);
    backdrop-filter: blur(20px);
    border: 1px solid var(--border-medium);
    border-radius: var(--radius-lg);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.6);
    padding: 2.5rem;
}

.auth-header {
    text-align: center;
    margin-bottom: 2rem;
}

.auth-logo {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 52px;
    height: 52px;
    background: linear-gradient(135deg, #4f46e5, #06b6d4);
    border-radius: var(--radius-lg);
    color: #ffffff;
    font-size: 1.5rem;
    font-weight: 800;
    margin-bottom: 1rem;
    box-shadow: 0 0 25px rgba(79, 70, 229, 0.5);
}

/* Timeline / Stream */
.activity-stream {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.activity-item {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--border-subtle);
}

.activity-item:last-child {
    border-bottom: none;
    padding-bottom: 0;
}

.activity-dot {
    width: 10px;
    height: 10px;
    border-radius: var(--radius-full);
    margin-top: 0.4rem;
    background: #6366f1;
    box-shadow: 0 0 8px #6366f1;
}

.activity-content {
    flex: 1;
}

.activity-event {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-primary);
}

.activity-meta {
    font-size: 0.75rem;
    color: var(--text-muted);
}

/* Module Grid */
.modules-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1.25rem;
}

.module-card {
    background: var(--bg-surface);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    padding: 1.25rem;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    transition: var(--transition);
}

.module-card.active {
    border-color: rgba(79, 70, 229, 0.4);
    background: linear-gradient(180deg, rgba(79, 70, 229, 0.05) 0%, var(--bg-surface) 100%);
}

.module-card.disabled {
    opacity: 0.6;
    border-style: dashed;
}

.module-card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.module-title {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-primary);
}

/* Responsive */
@media (max-width: 992px) {
    .sidebar {
        transform: translateX(-100%);
    }

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

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

    .mobile-menu-btn {
        display: block;
    }
}

/* Modals */
.modal-backdrop {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.75);
    backdrop-filter: blur(8px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 100;
    padding: 1.5rem;
    animation: fadeIn 0.2s ease;
}

.modal-dialog {
    width: 100%;
    max-width: 600px;
    background: var(--bg-surface);
    border: 1px solid var(--border-medium);
    border-radius: var(--radius-lg);
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.7);
    overflow: hidden;
    animation: scaleUp 0.2s ease;
}

.modal-header {
    padding: 1.25rem 1.5rem;
    border-bottom: 1px solid var(--border-subtle);
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: rgba(255, 255, 255, 0.02);
}

.modal-title {
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--text-primary);
}

.modal-close-btn {
    background: transparent;
    border: none;
    color: var(--text-muted);
    font-size: 1.5rem;
    cursor: pointer;
    line-height: 1;
    padding: 0.25rem;
    transition: var(--transition);
}

.modal-close-btn:hover {
    color: var(--text-primary);
}

.modal-body {
    padding: 1.5rem;
    max-height: calc(85vh - 140px);
    overflow-y: auto;
}

.modal-footer {
    padding: 1rem 1.5rem;
    border-top: 1px solid var(--border-subtle);
    background: rgba(255, 255, 255, 0.01);
    display: flex;
    justify-content: flex-end;
    gap: 0.75rem;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes scaleUp {
    from { transform: scale(0.96); opacity: 0; }
    to { transform: scale(1); opacity: 1; }
}