/**
 * Donatomasa - Design System
 * Premium Dark Theme with Glassmorphism
 */

/* ============================================
   CSS VARIABLES
   ============================================ */
:root {
    /* Colors - Dark premium */
    --color-bg-primary: #0a0a0f;
    --color-bg-secondary: #12121a;
    --color-bg-card: #16161f;
    --color-bg-card-hover: #1a1a25;
    --color-bg-elevated: #1e1e2a;
    --color-bg-input: #12121a;
    
    /* Brand */
    --color-primary: #6366f1;
    --color-primary-light: #818cf8;
    --color-primary-glow: rgba(99, 102, 241, 0.15);
    --color-secondary: #22d3ee;
    --color-secondary-glow: rgba(34, 211, 238, 0.1);
    --color-accent: #10b981;
    --color-accent-glow: rgba(16, 185, 129, 0.1);
    
    /* Status */
    --color-success: #10b981;
    --color-success-bg: rgba(16, 185, 129, 0.1);
    --color-warning: #f59e0b;
    --color-warning-bg: rgba(245, 158, 11, 0.1);
    --color-error: #ef4444;
    --color-error-bg: rgba(239, 68, 68, 0.1);
    --color-info: #3b82f6;
    --color-info-bg: rgba(59, 130, 246, 0.1);
    
    /* Text */
    --color-text-primary: #f1f5f9;
    --color-text-secondary: #94a3b8;
    --color-text-muted: #64748b;
    
    /* Borders */
    --color-border: rgba(255, 255, 255, 0.06);
    --color-border-hover: rgba(255, 255, 255, 0.12);
    
    /* Glassmorphism */
    --glass-bg: rgba(22, 22, 31, 0.8);
    --glass-border: rgba(255, 255, 255, 0.08);
    --glass-blur: blur(20px);
    
    /* Typography */
    --font-family: 'Inter', system-ui, -apple-system, sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-md: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 2rem;
    
    /* Spacing */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
    
    /* Borders */
    --radius-sm: 6px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --radius-full: 9999px;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 20px var(--color-primary-glow);
    
    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-base: 0.3s ease;
    --transition-slow: 0.5s ease;
    
    /* Layout */
    --sidebar-width: 260px;
    --sidebar-collapsed: 0px;
    --topbar-height: 64px;
    --mobile-header-height: 56px;
}

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

html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

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

a:hover {
    color: var(--color-primary);
}

code {
    font-family: 'JetBrains Mono', 'Fira Code', monospace;
    font-size: 0.875em;
    padding: 2px 6px;
    background: var(--color-bg-elevated);
    border-radius: var(--radius-sm);
    color: var(--color-secondary);
}

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

/* Mobile Header */
.mobile-header {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--mobile-header-height);
    background: var(--color-bg-secondary);
    border-bottom: 1px solid var(--color-border);
    padding: 0 var(--space-md);
    align-items: center;
    justify-content: space-between;
    z-index: 100;
    backdrop-filter: var(--glass-blur);
}

.mobile-logo {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-weight: 700;
    font-size: var(--font-size-md);
}

.menu-toggle, .notification-btn {
    background: none;
    border: none;
    color: var(--color-text-secondary);
    cursor: pointer;
    padding: 8px;
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
    position: relative;
}

.menu-toggle:hover, .notification-btn:hover {
    background: var(--color-bg-elevated);
    color: var(--color-text-primary);
}

.menu-toggle i, .notification-btn i {
    width: 22px;
    height: 22px;
}

.notif-badge {
    position: absolute;
    top: 4px;
    right: 4px;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: var(--color-error);
    color: white;
    font-size: 10px;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* ============================================
   SIDEBAR
   ============================================ */
.sidebar-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(4px);
    z-index: 98;
}

.sidebar {
    width: var(--sidebar-width);
    height: 100vh;
    position: fixed;
    top: 0;
    left: 0;
    background: var(--color-bg-secondary);
    border-right: 1px solid var(--color-border);
    display: flex;
    flex-direction: column;
    z-index: 99;
    overflow-y: auto;
    transition: transform var(--transition-base);
}

.sidebar-header {
    padding: var(--space-lg);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.sidebar-close {
    display: none;
    background: none;
    border: none;
    color: var(--color-text-muted);
    cursor: pointer;
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.logo-icon {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
    border-radius: var(--radius-md);
    font-weight: 800;
    font-size: var(--font-size-lg);
    color: white;
}

.logo-text {
    display: flex;
    flex-direction: column;
}

.logo-name {
    font-weight: 700;
    font-size: var(--font-size-md);
    line-height: 1.2;
}

.logo-subtitle {
    font-size: 10px;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.sidebar-user {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    padding: var(--space-md) var(--space-lg);
    margin: 0 var(--space-md);
    background: var(--color-bg-card);
    border-radius: var(--radius-md);
}

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

.user-info {
    display: flex;
    flex-direction: column;
    min-width: 0;
}

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

.user-role {
    font-size: 11px;
    color: var(--color-text-muted);
}

.sidebar-nav {
    flex: 1;
    padding: var(--space-lg) 0;
}

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

.nav-section-title {
    display: block;
    padding: var(--space-sm) var(--space-lg);
    font-size: 10px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    color: var(--color-text-muted);
}

.nav-link {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    padding: 10px var(--space-lg);
    color: var(--color-text-secondary);
    font-size: var(--font-size-sm);
    font-weight: 500;
    transition: all var(--transition-fast);
    border-left: 3px solid transparent;
}

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

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

.nav-link i {
    width: 18px;
    height: 18px;
    flex-shrink: 0;
}

.sidebar-footer {
    padding: var(--space-md) 0;
    border-top: 1px solid var(--color-border);
}

.logout-link {
    color: var(--color-text-muted) !important;
}

.logout-link:hover {
    color: var(--color-error) !important;
    background: var(--color-error-bg);
}

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

.topbar {
    height: var(--topbar-height);
    padding: 0 var(--space-xl);
    display: flex;
    align-items: center;
    justify-content: space-between;
    border-bottom: 1px solid var(--color-border);
    background: var(--color-bg-secondary);
    position: sticky;
    top: 0;
    z-index: 50;
    backdrop-filter: var(--glass-blur);
}

.page-title {
    font-size: var(--font-size-xl);
    font-weight: 700;
}

.page-description {
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
    margin-top: 2px;
}

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

.user-greeting {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
}

.page-content {
    flex: 1;
    padding: var(--space-xl);
}

/* ============================================
   CARDS
   ============================================ */
.card {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    backdrop-filter: var(--glass-blur);
    transition: border-color var(--transition-fast);
}

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

.card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--space-lg);
    flex-wrap: wrap;
    gap: var(--space-sm);
}

.card-title {
    font-size: var(--font-size-md);
    font-weight: 700;
}

/* ============================================
   STATS GRID
   ============================================ */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--space-md);
    margin-bottom: var(--space-xl);
}

.stat-card {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    display: flex;
    align-items: center;
    gap: var(--space-md);
    transition: all var(--transition-base);
}

.stat-card:hover {
    border-color: var(--color-border-hover);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.stat-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--stat-color-bg, var(--color-primary-glow));
    color: var(--stat-color, var(--color-primary));
}

.stat-icon i {
    width: 24px;
    height: 24px;
}

.stat-info {
    display: flex;
    flex-direction: column;
}

.stat-value {
    font-size: var(--font-size-2xl);
    font-weight: 800;
    line-height: 1;
}

.stat-label {
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
    margin-top: var(--space-xs);
}

/* ============================================
   BUTTONS
   ============================================ */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    padding: 10px 18px;
    font-family: var(--font-family);
    font-size: var(--font-size-sm);
    font-weight: 600;
    border-radius: var(--radius-md);
    border: 1px solid transparent;
    cursor: pointer;
    transition: all var(--transition-fast);
    white-space: nowrap;
    text-decoration: none;
}

.btn i { width: 16px; height: 16px; }
.btn-sm { padding: 6px 12px; font-size: var(--font-size-xs); }
.btn-sm i { width: 14px; height: 14px; }
.btn-lg { padding: 14px 24px; font-size: var(--font-size-md); }
.btn-block { width: 100%; }

.btn-primary { background: var(--color-primary); color: white; }
.btn-primary:hover { background: #5558e6; box-shadow: 0 0 16px var(--color-primary-glow); color: white; }

.btn-accent { background: var(--color-accent); color: white; }
.btn-accent:hover { background: #0ea572; box-shadow: 0 0 16px var(--color-accent-glow); color: white; }

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

.btn-ghost { background: transparent; color: var(--color-text-secondary); }
.btn-ghost:hover { background: var(--color-bg-elevated); color: var(--color-text-primary); }

.btn-danger { background: var(--color-error); color: white; }
.btn-danger:hover { background: #dc2626; }

.btn-success { background: var(--color-success); color: white; }
.btn-success:hover { background: #059669; }

.btn-group { display: flex; flex-wrap: wrap; gap: var(--space-sm); }

/* ============================================
   FORMS
   ============================================ */
.form-group {
    margin-bottom: var(--space-lg);
}

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

.form-input, .form-select, .form-textarea {
    width: 100%;
    padding: 10px 14px;
    font-family: var(--font-family);
    font-size: var(--font-size-sm);
    background: var(--color-bg-input);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    color: var(--color-text-primary);
    transition: all var(--transition-fast);
}

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

.form-input::placeholder, .form-textarea::placeholder {
    color: var(--color-text-muted);
}

.form-select {
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%2364748b' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
    padding-right: 36px;
}

.form-textarea {
    resize: vertical;
    min-height: 80px;
}

.form-hint {
    display: block;
    font-size: 11px;
    color: var(--color-text-muted);
    margin-top: 4px;
}

.form-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--space-md);
}

.search-box {
    position: relative;
}

.search-box i {
    position: absolute;
    left: 12px;
    top: 50%;
    transform: translateY(-50%);
    width: 16px;
    height: 16px;
    color: var(--color-text-muted);
}

.search-box .form-input {
    padding-left: 36px;
}

.required { color: var(--color-error); }

/* ============================================
   TABLES
   ============================================ */
.table-container {
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    overflow-x: auto;
}

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

.data-table th, .data-table td {
    padding: 12px 16px;
    text-align: left;
    border-bottom: 1px solid var(--color-border);
    font-size: var(--font-size-sm);
}

.data-table th {
    background: var(--color-bg-elevated);
    font-weight: 600;
    color: var(--color-text-muted);
    font-size: var(--font-size-xs);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    position: sticky;
    top: 0;
}

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

.data-table tbody tr:hover {
    background: var(--color-bg-card-hover);
}

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

/* ============================================
   STATUS BADGES
   ============================================ */
.status-badge {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 4px 10px;
    font-size: 11px;
    font-weight: 600;
    border-radius: var(--radius-full);
    background: color-mix(in srgb, var(--badge-color, var(--color-primary)) 15%, transparent);
    color: var(--badge-color, var(--color-primary));
    white-space: nowrap;
}

/* ============================================
   FLASH MESSAGES
   ============================================ */
.flash-message {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    padding: var(--space-md) var(--space-lg);
    border-radius: var(--radius-md);
    margin-bottom: var(--space-lg);
    font-size: var(--font-size-sm);
    animation: flashSlideIn 0.3s ease;
}

@keyframes flashSlideIn {
    from { opacity: 0; transform: translateY(-10px); }
    to { opacity: 1; transform: translateY(0); }
}

.flash-message i { width: 20px; height: 20px; flex-shrink: 0; }

.flash-success { background: var(--color-success-bg); color: var(--color-success); border: 1px solid rgba(16, 185, 129, 0.2); }
.flash-error { background: var(--color-error-bg); color: var(--color-error); border: 1px solid rgba(239, 68, 68, 0.2); }
.flash-warning { background: var(--color-warning-bg); color: var(--color-warning); border: 1px solid rgba(245, 158, 11, 0.2); }
.flash-info { background: var(--color-info-bg); color: var(--color-info); border: 1px solid rgba(59, 130, 246, 0.2); }

.flash-close {
    margin-left: auto;
    background: none;
    border: none;
    color: inherit;
    cursor: pointer;
    opacity: 0.6;
}

.flash-close:hover { opacity: 1; }

/* ============================================
   EMPTY STATES
   ============================================ */
.empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--space-2xl);
    text-align: center;
    color: var(--color-text-muted);
}

.empty-state i {
    width: 48px;
    height: 48px;
    margin-bottom: var(--space-md);
    opacity: 0.3;
}

.empty-state h3 {
    margin-bottom: var(--space-sm);
    color: var(--color-text-secondary);
}

.empty-state p {
    font-size: var(--font-size-sm);
    margin-bottom: var(--space-lg);
}

/* ============================================
   PAGINATION
   ============================================ */
.pagination {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-xs);
    padding: var(--space-lg);
}

.pagination a, .pagination span {
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: 36px;
    height: 36px;
    padding: 0 var(--space-sm);
    font-size: var(--font-size-sm);
    font-weight: 600;
    border-radius: var(--radius-md);
    color: var(--color-text-secondary);
    transition: all var(--transition-fast);
}

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

.pagination span.active {
    background: var(--color-primary);
    color: white;
}

.pagination a i { width: 16px; height: 16px; }

/* ============================================
   MODALS
   ============================================ */
.modal-backdrop {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(4px);
    z-index: 300;
    display: none;
    align-items: center;
    justify-content: center;
}

.modal-backdrop.active { display: flex; }

.modal {
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    padding: var(--space-xl);
    max-width: 500px;
    width: 90%;
    max-height: 80vh;
    overflow-y: auto;
}

/* ============================================
   SPINNER
   ============================================ */
.spinner {
    width: 24px;
    height: 24px;
    border: 3px solid var(--color-border);
    border-top-color: var(--color-primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    display: inline-block;
}

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

/* ============================================
   UTILITIES
   ============================================ */
.text-muted { color: var(--color-text-muted); }
.text-success { color: var(--color-success); }
.text-error { color: var(--color-error); }
.text-warning { color: var(--color-warning); }

.mb-1 { margin-bottom: var(--space-md); }
.mb-2 { margin-bottom: var(--space-lg); }
.mt-1 { margin-top: var(--space-md); }
.mt-2 { margin-top: var(--space-lg); }

.flex-between {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-md);
    flex-wrap: wrap;
}

.desktop-only { display: flex; }
.mobile-only { display: none; }

/* ============================================
   LOGIN PAGE
   ============================================ */
.login-page {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    background: var(--color-bg-primary);
    background-image: radial-gradient(ellipse at 50% 0%, rgba(99, 102, 241, 0.1) 0%, transparent 60%);
}

.login-container {
    width: 100%;
    max-width: 420px;
    padding: var(--space-xl);
}

.login-card {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-xl);
    padding: var(--space-2xl);
    backdrop-filter: var(--glass-blur);
}

.login-logo {
    text-align: center;
    margin-bottom: var(--space-2xl);
}

.login-logo .logo-icon {
    width: 56px;
    height: 56px;
    font-size: var(--font-size-2xl);
    margin: 0 auto var(--space-md);
}

.login-logo h1 {
    font-size: var(--font-size-2xl);
    font-weight: 800;
}

.login-logo p {
    color: var(--color-text-muted);
    font-size: var(--font-size-sm);
    margin-top: var(--space-xs);
}

.login-error {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-md);
    background: var(--color-error-bg);
    color: var(--color-error);
    border-radius: var(--radius-md);
    font-size: var(--font-size-sm);
    margin-bottom: var(--space-lg);
    border: 1px solid rgba(239, 68, 68, 0.2);
}

.login-error i { width: 18px; height: 18px; flex-shrink: 0; }

/* ============================================
   ERROR PAGES
   ============================================ */
.error-page {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
}

.error-container {
    text-align: center;
}

.error-code {
    font-size: 6rem;
    font-weight: 800;
    color: var(--color-primary);
    line-height: 1;
    opacity: 0.3;
}

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 1024px) {
    .mobile-header {
        display: flex;
    }
    
    .sidebar {
        transform: translateX(-100%);
    }
    
    .sidebar.open {
        transform: translateX(0);
    }
    
    .sidebar-overlay.active {
        display: block;
    }
    
    .sidebar-close {
        display: block;
    }
    
    .main-content {
        margin-left: 0;
    }
    
    .topbar {
        display: none;
    }
    
    .page-content {
        padding: var(--space-md);
        padding-top: calc(var(--mobile-header-height) + var(--space-md));
    }
    
    .desktop-only { display: none !important; }
    .mobile-only { display: flex !important; }
    
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 640px) {
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .stat-card {
        padding: var(--space-md);
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
}