/**
 * Rotor Recyclers - Custom Design System
 * Version: 1.0.0
 */

/* ============================================
   IMPORT FONTS
   ============================================ */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&display=swap');

/* ============================================
   ROOT VARIABLES - Brand Colors
   ============================================ */
:root {
    /* Primary Brand Colors */
    --rotor-green-50: #f0fdf4;
    --rotor-green-100: #dcfce7;
    --rotor-green-200: #bbf7d0;
    --rotor-green-300: #86efac;
    --rotor-green-400: #4ade80;
    --rotor-green-500: #22c55e;
    --rotor-green-600: #16a34a;
    --rotor-green-700: #15803d;
    --rotor-green-800: #166534;
    --rotor-green-900: #14532d;
    
    /* Neutral Grays */
    --slate-50: #f8fafc;
    --slate-100: #f1f5f9;
    --slate-200: #e2e8f0;
    --slate-300: #cbd5e1;
    --slate-400: #94a3b8;
    --slate-500: #64748b;
    --slate-600: #475569;
    --slate-700: #334155;
    --slate-800: #1e293b;
    --slate-900: #0f172a;
    
    /* Status Colors */
    --success: #22c55e;
    --warning: #f59e0b;
    --error: #ef4444;
    --info: #3b82f6;
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    
    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    
    /* Transitions */
    --transition-fast: 150ms ease-in-out;
    --transition-base: 200ms ease-in-out;
    --transition-slow: 300ms ease-in-out;
}

/* ============================================
   BASE STYLES
   ============================================ */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    color: var(--slate-800);
    background-color: var(--slate-50);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ============================================
   BACKGROUNDS
   ============================================ */
.bg-rotor-primary {
    background: linear-gradient(135deg, var(--slate-900) 0%, var(--slate-800) 100%);
}

.bg-rotor-gradient {
    background: linear-gradient(135deg, var(--rotor-green-600) 0%, var(--rotor-green-700) 100%);
}

.bg-rotor-light {
    background: linear-gradient(135deg, var(--slate-50) 0%, var(--slate-100) 100%);
}

.bg-rotor-card {
    background: white;
    border: 1px solid var(--slate-200);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-md);
}

.bg-rotor-glass {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

/* ============================================
   BUTTONS
   ============================================ */
.btn-rotor {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.75rem 1.5rem;
    font-size: 0.9375rem;
    font-weight: 600;
    border-radius: var(--radius-lg);
    border: none;
    cursor: pointer;
    transition: all var(--transition-base);
    text-decoration: none;
    white-space: nowrap;
    user-select: none;
}

.btn-rotor:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.btn-rotor-primary {
    background: var(--rotor-green-600);
    color: white;
}

.btn-rotor-primary:hover:not(:disabled) {
    background: var(--rotor-green-700);
    box-shadow: var(--shadow-lg);
    transform: translateY(-1px);
}

.btn-rotor-primary:active:not(:disabled) {
    transform: translateY(0);
}

.btn-rotor-secondary {
    background: var(--slate-200);
    color: var(--slate-800);
}

.btn-rotor-secondary:hover:not(:disabled) {
    background: var(--slate-300);
}

.btn-rotor-outline {
    background: transparent;
    border: 2px solid var(--rotor-green-600);
    color: var(--rotor-green-600);
}

.btn-rotor-outline:hover:not(:disabled) {
    background: var(--rotor-green-50);
}

.btn-rotor-danger {
    background: var(--error);
    color: white;
}

.btn-rotor-danger:hover:not(:disabled) {
    background: #dc2626;
}

.btn-rotor-sm {
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
}

.btn-rotor-lg {
    padding: 1rem 2rem;
    font-size: 1rem;
}

/* ============================================
   FORMS & INPUTS
   ============================================ */
.form-rotor {
    width: 100%;
}

.form-group {
    margin-bottom: var(--spacing-lg);
}

.form-label {
    display: block;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--slate-700);
    margin-bottom: var(--spacing-sm);
}

.form-label.required::after {
    content: '*';
    color: var(--error);
    margin-left: 0.25rem;
}

.form-input,
.form-select,
.form-textarea {
    width: 100%;
    padding: 0.875rem 1rem;
    font-size: 0.9375rem;
    color: var(--slate-900);
    background: white;
    border: 1px solid var(--slate-300);
    border-radius: var(--radius-lg);
    transition: all var(--transition-base);
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
    outline: none;
    border-color: var(--rotor-green-500);
    box-shadow: 0 0 0 3px rgba(34, 197, 94, 0.1);
}

.form-input::placeholder {
    color: var(--slate-400);
}

.form-input.error {
    border-color: var(--error);
}

.form-input.error:focus {
    box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.1);
}

.form-input-icon {
    position: relative;
}

.form-input-icon input {
    padding-left: 2.75rem;
}

.form-input-icon .icon {
    position: absolute;
    left: 1rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--slate-400);
}

.form-error {
    display: block;
    margin-top: var(--spacing-xs);
    font-size: 0.875rem;
    color: var(--error);
}

.form-help {
    display: block;
    margin-top: var(--spacing-xs);
    font-size: 0.875rem;
    color: var(--slate-500);
}

/* Checkbox & Radio */
.form-checkbox,
.form-radio {
    width: 1.125rem;
    height: 1.125rem;
    cursor: pointer;
    accent-color: var(--rotor-green-600);
}

/* ============================================
   TABLES
   ============================================ */
.table-rotor {
    width: 100%;
    background: white;
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-md);
}

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

.table-rotor thead {
    background: var(--slate-50);
    border-bottom: 2px solid var(--slate-200);
}

.table-rotor th {
    padding: 1rem 1.5rem;
    text-align: left;
    font-size: 0.875rem;
    font-weight: 700;
    color: var(--slate-700);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.table-rotor td {
    padding: 1rem 1.5rem;
    font-size: 0.9375rem;
    color: var(--slate-800);
    border-bottom: 1px solid var(--slate-100);
}

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

.table-rotor tbody tr:hover {
    background: var(--slate-50);
    transition: background var(--transition-fast);
}

.table-rotor-striped tbody tr:nth-child(even) {
    background: var(--slate-50);
}

.table-rotor-bordered {
    border: 1px solid var(--slate-200);
}

.table-rotor-bordered td,
.table-rotor-bordered th {
    border-right: 1px solid var(--slate-100);
}

.table-rotor-bordered td:last-child,
.table-rotor-bordered th:last-child {
    border-right: none;
}

/* Table Actions */
.table-action-btn {
    display: inline-flex;
    align-items: center;
    padding: 0.375rem 0.75rem;
    font-size: 0.875rem;
    border-radius: var(--radius-md);
    border: none;
    cursor: pointer;
    transition: all var(--transition-base);
    margin-right: 0.5rem;
}

.table-action-btn:last-child {
    margin-right: 0;
}

.table-action-edit {
    background: var(--info);
    color: white;
}

.table-action-edit:hover {
    background: #2563eb;
}

.table-action-delete {
    background: var(--error);
    color: white;
}

.table-action-delete:hover {
    background: #dc2626;
}

.table-action-view {
    background: var(--slate-200);
    color: var(--slate-800);
}

.table-action-view:hover {
    background: var(--slate-300);
}

/* ============================================
   SIDEBAR NAVIGATION
   ============================================ */
.sidebar-rotor {
    width: 280px;
    height: 100vh;
    background: var(--slate-900);
    color: white;
    position: fixed;
    left: 0;
    top: 0;
    overflow-y: auto;
    box-shadow: var(--shadow-xl);
    z-index: 1000;
}

.sidebar-header {
    padding: var(--spacing-xl);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.sidebar-logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.sidebar-logo img {
    height: 3rem;
    width: auto;
    border-radius: var(--radius-lg);
}

.sidebar-logo-text {
    font-size: 1.25rem;
    font-weight: 700;
    color: white;
}

.sidebar-nav {
    padding: var(--spacing-lg) 0;
}

.sidebar-section {
    margin-bottom: var(--spacing-xl);
}

.sidebar-section-title {
    padding: 0 var(--spacing-lg);
    margin-bottom: var(--spacing-sm);
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--slate-400);
}

.sidebar-link {
    display: flex;
    align-items: center;
    padding: 0.875rem var(--spacing-lg);
    color: var(--slate-300);
    text-decoration: none;
    transition: all var(--transition-base);
    position: relative;
}

.sidebar-link:hover {
    background: rgba(255, 255, 255, 0.05);
    color: white;
}

.sidebar-link.active {
    background: linear-gradient(90deg, var(--rotor-green-600) 0%, var(--rotor-green-700) 100%);
    color: white;
}

.sidebar-link.active::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 4px;
    background: var(--rotor-green-400);
}

.sidebar-link-icon {
    width: 1.25rem;
    margin-right: var(--spacing-md);
    text-align: center;
}

.sidebar-link-text {
    font-size: 0.9375rem;
    font-weight: 500;
}

.sidebar-link-badge {
    margin-left: auto;
    padding: 0.25rem 0.5rem;
    font-size: 0.75rem;
    font-weight: 600;
    background: var(--rotor-green-600);
    border-radius: 9999px;
}

/* Sidebar Footer */
.sidebar-footer {
    padding: var(--spacing-lg);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    margin-top: auto;
}

.sidebar-user {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.sidebar-user-avatar {
    width: 2.5rem;
    height: 2.5rem;
    border-radius: 50%;
    background: var(--rotor-green-600);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
}

.sidebar-user-info {
    flex: 1;
}

.sidebar-user-name {
    font-size: 0.875rem;
    font-weight: 600;
    color: white;
}

.sidebar-user-role {
    font-size: 0.75rem;
    color: var(--slate-400);
}

/* ============================================
   CARDS
   ============================================ */
.card-rotor {
    background: white;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--slate-200);
    overflow: hidden;
    transition: all var(--transition-base);
}

.card-rotor:hover {
    box-shadow: var(--shadow-lg);
}

.card-rotor-header {
    padding: var(--spacing-lg) var(--spacing-xl);
    border-bottom: 1px solid var(--slate-200);
}

.card-rotor-title {
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--slate-900);
    margin: 0;
}

.card-rotor-subtitle {
    font-size: 0.875rem;
    color: var(--slate-500);
    margin-top: var(--spacing-xs);
}

.card-rotor-body {
    padding: var(--spacing-xl);
}

.card-rotor-footer {
    padding: var(--spacing-lg) var(--spacing-xl);
    background: var(--slate-50);
    border-top: 1px solid var(--slate-200);
}

/* Stats Card */
.stats-card {
    background: white;
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--slate-200);
    transition: all var(--transition-base);
}

.stats-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.stats-card-icon {
    width: 3rem;
    height: 3rem;
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    margin-bottom: var(--spacing-md);
}

.stats-card-icon.green {
    background: var(--rotor-green-100);
    color: var(--rotor-green-600);
}

.stats-card-icon.blue {
    background: #dbeafe;
    color: var(--info);
}

.stats-card-icon.yellow {
    background: #fef3c7;
    color: var(--warning);
}

.stats-card-icon.red {
    background: #fee2e2;
    color: var(--error);
}

.stats-card-value {
    font-size: 2rem;
    font-weight: 800;
    color: var(--slate-900);
    line-height: 1;
}

.stats-card-label {
    font-size: 0.875rem;
    color: var(--slate-600);
    margin-top: var(--spacing-sm);
}

.stats-card-change {
    display: inline-flex;
    align-items: center;
    margin-top: var(--spacing-sm);
    font-size: 0.875rem;
    font-weight: 600;
}

.stats-card-change.positive {
    color: var(--success);
}

.stats-card-change.negative {
    color: var(--error);
}

/* ============================================
   BADGES & PILLS
   ============================================ */
.badge-rotor {
    display: inline-flex;
    align-items: center;
    padding: 0.25rem 0.75rem;
    font-size: 0.75rem;
    font-weight: 600;
    border-radius: 9999px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.badge-success {
    background: var(--rotor-green-100);
    color: var(--rotor-green-700);
}

.badge-warning {
    background: #fef3c7;
    color: #92400e;
}

.badge-error {
    background: #fee2e2;
    color: #991b1b;
}

.badge-info {
    background: #dbeafe;
    color: #1e40af;
}

.badge-neutral {
    background: var(--slate-100);
    color: var(--slate-700);
}

/* ============================================
   ALERTS
   ============================================ */
.alert-rotor {
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    border: 1px solid;
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-md);
}

.alert-success {
    background: var(--rotor-green-50);
    border-color: var(--rotor-green-200);
    color: var(--rotor-green-800);
}

.alert-warning {
    background: #fef3c7;
    border-color: #fde68a;
    color: #92400e;
}

.alert-error {
    background: #fee2e2;
    border-color: #fecaca;
    color: #991b1b;
}

.alert-info {
    background: #dbeafe;
    border-color: #bfdbfe;
    color: #1e40af;
}

.alert-icon {
    flex-shrink: 0;
    font-size: 1.25rem;
}

.alert-content {
    flex: 1;
}

.alert-title {
    font-weight: 600;
    margin-bottom: 0.25rem;
}

/* ============================================
   MODALS
   ============================================ */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    padding: var(--spacing-lg);
}

.modal-rotor {
    background: white;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
    max-width: 500px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
}

.modal-header {
    padding: var(--spacing-xl);
    border-bottom: 1px solid var(--slate-200);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.modal-title {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--slate-900);
    margin: 0;
}

.modal-close {
    width: 2rem;
    height: 2rem;
    border-radius: 50%;
    border: none;
    background: var(--slate-100);
    color: var(--slate-600);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-base);
}

.modal-close:hover {
    background: var(--slate-200);
}

.modal-body {
    padding: var(--spacing-xl);
}

.modal-footer {
    padding: var(--spacing-lg) var(--spacing-xl);
    background: var(--slate-50);
    border-top: 1px solid var(--slate-200);
    display: flex;
    gap: var(--spacing-md);
    justify-content: flex-end;
}

/* ============================================
   PAGINATION
   ============================================ */
.pagination-rotor {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    justify-content: center;
    margin-top: var(--spacing-xl);
}

.pagination-btn {
    padding: 0.5rem 0.75rem;
    border: 1px solid var(--slate-300);
    background: white;
    color: var(--slate-700);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-base);
    font-size: 0.875rem;
    font-weight: 500;
}

.pagination-btn:hover:not(:disabled) {
    background: var(--slate-50);
    border-color: var(--rotor-green-500);
}

.pagination-btn.active {
    background: var(--rotor-green-600);
    color: white;
    border-color: var(--rotor-green-600);
}

.pagination-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* ============================================
   UTILITIES
   ============================================ */
.text-rotor-primary {
    color: var(--rotor-green-600);
}

.text-rotor-secondary {
    color: var(--slate-600);
}

.divider-rotor {
    height: 1px;
    background: var(--slate-200);
    margin: var(--spacing-xl) 0;
}

.shadow-rotor-sm {
    box-shadow: var(--shadow-sm);
}

.shadow-rotor-md {
    box-shadow: var(--shadow-md);
}

.shadow-rotor-lg {
    box-shadow: var(--shadow-lg);
}

.rounded-rotor {
    border-radius: var(--radius-lg);
}

.spinner-rotor {
    border: 3px solid var(--slate-200);
    border-top-color: var(--rotor-green-600);
    border-radius: 50%;
    width: 2rem;
    height: 2rem;
    animation: spin 0.8s linear infinite;
}

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

/* ============================================
   RESPONSIVE UTILITIES
   ============================================ */
@media (max-width: 768px) {
    .sidebar-rotor {
        transform: translateX(-100%);
        transition: transform var(--transition-base);
    }
    
    .sidebar-rotor.open {
        transform: translateX(0);
    }
    
    .table-rotor {
        overflow-x: auto;
    }
    
    .stats-card {
        text-align: center;
    }
    
    .stats-card-icon {
        margin-left: auto;
        margin-right: auto;
    }
}

/* ============================================
   SCROLLBAR STYLING
   ============================================ */
::-webkit-scrollbar {
    width: 10px;
    height: 10px;
}

::-webkit-scrollbar-track {
    background: var(--slate-100);
}

::-webkit-scrollbar-thumb {
    background: var(--slate-400);
    border-radius: 5px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--slate-500);
}

/* Dark scrollbar for sidebar */
.sidebar-rotor::-webkit-scrollbar-track {
    background: var(--slate-800);
}

.sidebar-rotor::-webkit-scrollbar-thumb {
    background: var(--slate-600);
}

.sidebar-rotor::-webkit-scrollbar-thumb:hover {
    background: var(--slate-500);
}