/* ============================================================
   Ok Credit Enterprise - Admin Panel Stylesheet
   Premium Dark Mode Design with Glassmorphism
   ============================================================ */

/* CSS Custom Properties (Design Tokens) */
:root {
    /* Color Palette */
    --color-bg-primary: #0a0e1a;
    --color-bg-secondary: #111827;
    --color-bg-card: rgba(17, 24, 39, 0.8);
    --color-bg-card-hover: rgba(30, 41, 59, 0.9);
    --color-bg-sidebar: rgba(15, 23, 42, 0.95);
    --color-bg-input: rgba(30, 41, 59, 0.6);

    --color-border: rgba(148, 163, 184, 0.1);
    --color-border-focus: rgba(99, 102, 241, 0.5);

    --color-text-primary: #f1f5f9;
    --color-text-secondary: #94a3b8;
    --color-text-muted: #64748b;

    --color-accent: #6366f1;
    --color-accent-light: #818cf8;
    --color-accent-dark: #4f46e5;

    --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-danger: #ef4444;
    --color-danger-bg: rgba(239, 68, 68, 0.1);
    --color-info: #06b6d4;
    --color-info-bg: rgba(6, 182, 212, 0.1);

    /* Gradients */
    --gradient-primary: linear-gradient(135deg, #6366f1, #8b5cf6);
    --gradient-success: linear-gradient(135deg, #10b981, #059669);
    --gradient-warning: linear-gradient(135deg, #f59e0b, #d97706);
    --gradient-dark: linear-gradient(135deg, #1e293b, #0f172a);
    --gradient-glass: linear-gradient(135deg, rgba(255,255,255,0.05), rgba(255,255,255,0.02));

    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 10px 25px -5px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 20px rgba(99, 102, 241, 0.3);
    --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.3);

    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 2rem;

    /* Spacing */
    --sidebar-width: 260px;
    --sidebar-collapsed: 72px;
    --header-height: 64px;
    --border-radius: 12px;
    --border-radius-sm: 8px;
    --border-radius-lg: 16px;

    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-base: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ============================================================
   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;
    overflow-x: hidden;
}

a {
    text-decoration: none;
    color: inherit;
}

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

/* ============================================================
   Sidebar
   ============================================================ */
.sidebar {
    position: fixed;
    top: 0;
    left: 0;
    width: var(--sidebar-width);
    height: 100vh;
    background: var(--color-bg-sidebar);
    backdrop-filter: blur(20px);
    border-right: 1px solid var(--color-border);
    display: flex;
    flex-direction: column;
    z-index: 100;
    transition: width var(--transition-base);
}

.sidebar.collapsed {
    width: var(--sidebar-collapsed);
}

.sidebar-header {
    padding: 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    border-bottom: 1px solid var(--color-border);
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo-icon {
    width: 40px;
    height: 40px;
    background: var(--gradient-primary);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    font-weight: 800;
    color: white;
    box-shadow: var(--shadow-glow);
    animation: pulse-glow 3s ease-in-out infinite;
}

@keyframes pulse-glow {
    0%, 100% { box-shadow: var(--shadow-glow); }
    50% { box-shadow: 0 0 30px rgba(99, 102, 241, 0.5); }
}

.logo-text {
    font-size: var(--font-size-xl);
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.sidebar.collapsed .logo-text,
.sidebar.collapsed .nav-label,
.sidebar.collapsed .user-details {
    display: none;
}

.sidebar-toggle {
    background: none;
    border: none;
    cursor: pointer;
    display: flex;
    flex-direction: column;
    gap: 4px;
    padding: 8px;
}

.sidebar-toggle span {
    width: 20px;
    height: 2px;
    background: var(--color-text-secondary);
    border-radius: 2px;
    transition: var(--transition-fast);
}

.sidebar-toggle:hover span {
    background: var(--color-accent);
}

/* Navigation */
.sidebar-nav {
    flex: 1;
    padding: 16px 12px;
    display: flex;
    flex-direction: column;
    gap: 4px;
    overflow-y: auto;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    border-radius: var(--border-radius-sm);
    color: var(--color-text-secondary);
    font-size: var(--font-size-sm);
    font-weight: 500;
    transition: var(--transition-fast);
    position: relative;
}

.nav-item:hover {
    background: rgba(99, 102, 241, 0.1);
    color: var(--color-text-primary);
}

.nav-item.active {
    background: rgba(99, 102, 241, 0.15);
    color: var(--color-accent-light);
}

.nav-item.active::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 3px;
    height: 20px;
    background: var(--gradient-primary);
    border-radius: 0 3px 3px 0;
}

.nav-icon {
    font-size: 18px;
    width: 24px;
    text-align: center;
}

/* Sidebar Footer */
.sidebar-footer {
    padding: 16px;
    border-top: 1px solid var(--color-border);
}

.user-info {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 12px;
}

.user-avatar {
    width: 36px;
    height: 36px;
    background: var(--gradient-primary);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: var(--font-size-sm);
    color: white;
}

.user-details {
    display: flex;
    flex-direction: column;
}

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

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

.logout-btn {
    display: block;
    width: 100%;
    padding: 8px;
    text-align: center;
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid rgba(239, 68, 68, 0.2);
    border-radius: var(--border-radius-sm);
    color: var(--color-danger);
    font-size: var(--font-size-sm);
    font-weight: 500;
    transition: var(--transition-fast);
}

.logout-btn:hover {
    background: rgba(239, 68, 68, 0.2);
}

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

.sidebar.collapsed ~ .main-content {
    margin-left: var(--sidebar-collapsed);
}

.content-header {
    height: var(--header-height);
    padding: 0 32px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    border-bottom: 1px solid var(--color-border);
    background: rgba(10, 14, 26, 0.8);
    backdrop-filter: blur(10px);
    position: sticky;
    top: 0;
    z-index: 50;
}

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

.current-time {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
}

.content-body {
    padding: 32px;
}

/* ============================================================
   Dashboard Stats
   ============================================================ */
.dashboard-grid {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.stats-row {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}

.stat-card {
    background: var(--color-bg-card);
    backdrop-filter: blur(16px);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    padding: 24px;
    display: flex;
    align-items: flex-start;
    gap: 16px;
    position: relative;
    overflow: hidden;
    transition: var(--transition-base);
    animation: fadeInUp 0.6s ease-out backwards;
}

.stat-card:nth-child(1) { animation-delay: 0.1s; }
.stat-card:nth-child(2) { animation-delay: 0.2s; }
.stat-card:nth-child(3) { animation-delay: 0.3s; }
.stat-card:nth-child(4) { animation-delay: 0.4s; }

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

.stat-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: rgba(99, 102, 241, 0.2);
}

.stat-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    border-radius: 3px 3px 0 0;
}

.stat-card--primary::before { background: var(--gradient-primary); }
.stat-card--success::before { background: var(--gradient-success); }
.stat-card--warning::before { background: var(--gradient-warning); }
.stat-card--info::before { background: linear-gradient(135deg, #06b6d4, #0891b2); }
.stat-card--dark::before { background: var(--gradient-dark); }
.stat-card--gradient::before { background: linear-gradient(135deg, #ec4899, #8b5cf6); }
.stat-card--accent::before { background: linear-gradient(135deg, #f97316, #ef4444); }
.stat-card--security::before { background: var(--gradient-success); }

.stat-card-icon {
    font-size: 28px;
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-glass);
    border-radius: var(--border-radius-sm);
    border: 1px solid var(--color-border);
    flex-shrink: 0;
}

.stat-card-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.stat-value {
    font-size: var(--font-size-2xl);
    font-weight: 800;
    letter-spacing: -0.02em;
    line-height: 1.2;
}

.stat-label {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
    font-weight: 400;
}

.stat-badge {
    position: absolute;
    top: 16px;
    right: 16px;
    padding: 4px 10px;
    background: rgba(99, 102, 241, 0.15);
    border: 1px solid rgba(99, 102, 241, 0.2);
    border-radius: 20px;
    font-size: var(--font-size-xs);
    font-weight: 600;
    color: var(--color-accent-light);
}

.stat-badge--glow {
    background: rgba(99, 102, 241, 0.2);
    box-shadow: 0 0 10px rgba(99, 102, 241, 0.2);
}

.stat-badge--green {
    background: var(--color-success-bg);
    border-color: rgba(16, 185, 129, 0.3);
    color: var(--color-success);
}

.text-success { color: var(--color-success); }
.text-danger { color: var(--color-danger); }

/* ============================================================
   Quick Actions
   ============================================================ */
.section-header {
    margin-top: 40px;
    margin-bottom: 20px;
}

.section-title {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--color-text-primary);
}

.quick-actions {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
}

.action-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    padding: 24px;
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    transition: var(--transition-base);
    cursor: pointer;
}

.action-card:hover {
    background: var(--color-bg-card-hover);
    border-color: var(--color-accent);
    transform: translateY(-2px);
    box-shadow: var(--shadow-glow);
}

.action-icon {
    font-size: 32px;
}

.action-label {
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--color-text-secondary);
}

.action-card:hover .action-label {
    color: var(--color-text-primary);
}

/* ============================================================
   Auth Pages
   ============================================================ */
.auth-page {
    background: var(--color-bg-primary);
    background-image: 
        radial-gradient(ellipse at 20% 80%, rgba(99, 102, 241, 0.08) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 20%, rgba(139, 92, 246, 0.06) 0%, transparent 50%);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
}

.auth-container {
    width: 100%;
    max-width: 420px;
    padding: 20px;
}

.auth-card {
    background: var(--color-bg-card);
    backdrop-filter: blur(20px);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-lg);
    padding: 40px;
    box-shadow: var(--shadow-lg);
    animation: fadeInUp 0.5s ease-out;
}

.auth-card-header {
    text-align: center;
    margin-bottom: 32px;
}

.auth-logo {
    margin-bottom: 16px;
}

.auth-logo-icon {
    width: 64px;
    height: 64px;
    background: var(--gradient-primary);
    border-radius: 16px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 32px;
    font-weight: 800;
    color: white;
    box-shadow: var(--shadow-glow);
    animation: pulse-glow 3s ease-in-out infinite;
}

.auth-title {
    font-size: var(--font-size-2xl);
    font-weight: 800;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.auth-subtitle {
    color: var(--color-text-muted);
    font-size: var(--font-size-sm);
    margin-top: 4px;
}

/* ============================================================
   Forms
   ============================================================ */
.auth-form {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.form-label {
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--color-text-secondary);
}

.input-wrapper {
    position: relative;
    display: flex;
    align-items: center;
}

.input-icon {
    position: absolute;
    left: 14px;
    font-size: 16px;
    pointer-events: none;
    z-index: 1;
}

.form-input {
    width: 100%;
    padding: 12px 16px 12px 44px;
    background: var(--color-bg-input);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-sm);
    color: var(--color-text-primary);
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    transition: var(--transition-fast);
    outline: none;
}

.form-input:focus {
    border-color: var(--color-border-focus);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.15);
}

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

.password-toggle {
    position: absolute;
    right: 12px;
    background: none;
    border: none;
    cursor: pointer;
    font-size: 16px;
    padding: 4px;
    z-index: 1;
}

/* ============================================================
   Buttons
   ============================================================ */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 24px;
    border: none;
    border-radius: var(--border-radius-sm);
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-fast);
    outline: none;
}

.btn-primary {
    background: var(--gradient-primary);
    color: white;
    box-shadow: var(--shadow-sm);
}

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

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

.btn-primary:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

.btn-full {
    width: 100%;
}

/* ============================================================
   Alerts
   ============================================================ */
.alert {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 16px;
    border-radius: var(--border-radius-sm);
    font-size: var(--font-size-sm);
    font-weight: 500;
    margin-bottom: 16px;
    animation: shakeX 0.5s ease;
}

@keyframes shakeX {
    0%, 100% { transform: translateX(0); }
    20%, 60% { transform: translateX(-6px); }
    40%, 80% { transform: translateX(6px); }
}

.alert-error {
    background: var(--color-danger-bg);
    border: 1px solid rgba(239, 68, 68, 0.3);
    color: var(--color-danger);
}

.alert-success {
    background: var(--color-success-bg);
    border: 1px solid rgba(16, 185, 129, 0.3);
    color: var(--color-success);
}

.alert-icon {
    flex-shrink: 0;
}

/* ============================================================
   Auth Footer
   ============================================================ */
.auth-footer {
    text-align: center;
    margin-top: 24px;
    padding-top: 20px;
    border-top: 1px solid var(--color-border);
}

.auth-security-badge {
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
    letter-spacing: 0.05em;
}

/* ============================================================
   Tables
   ============================================================ */
.data-table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 16px;
}

.data-table thead th {
    padding: 12px 16px;
    text-align: left;
    font-size: var(--font-size-xs);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-text-muted);
    border-bottom: 1px solid var(--color-border);
}

.data-table tbody td {
    padding: 14px 16px;
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    border-bottom: 1px solid var(--color-border);
    transition: var(--transition-fast);
}

.data-table tbody tr:hover td {
    background: rgba(99, 102, 241, 0.05);
    color: var(--color-text-primary);
}

/* Status Badges */
.badge {
    display: inline-flex;
    align-items: center;
    padding: 4px 10px;
    border-radius: 20px;
    font-size: var(--font-size-xs);
    font-weight: 600;
}

.badge-active {
    background: var(--color-success-bg);
    color: var(--color-success);
    border: 1px solid rgba(16, 185, 129, 0.2);
}

.badge-inactive {
    background: rgba(107, 114, 128, 0.1);
    color: #9ca3af;
    border: 1px solid rgba(107, 114, 128, 0.2);
}

.badge-suspended {
    background: var(--color-danger-bg);
    color: var(--color-danger);
    border: 1px solid rgba(239, 68, 68, 0.2);
}

.badge-credit {
    background: var(--color-warning-bg);
    color: var(--color-warning);
    border: 1px solid rgba(245, 158, 11, 0.2);
}

.badge-payment {
    background: var(--color-success-bg);
    color: var(--color-success);
    border: 1px solid rgba(16, 185, 129, 0.2);
}

/* ============================================================
   Error Pages
   ============================================================ */
.error-page {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 60vh;
    text-align: center;
}

.error-code {
    font-size: 6rem;
    font-weight: 800;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* ============================================================
   Responsive Design
   ============================================================ */
@media (max-width: 1200px) {
    .stats-row {
        grid-template-columns: repeat(2, 1fr);
    }
    .quick-actions {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .sidebar {
        width: var(--sidebar-collapsed);
    }
    .sidebar .logo-text,
    .sidebar .nav-label,
    .sidebar .user-details {
        display: none;
    }
    .main-content {
        margin-left: var(--sidebar-collapsed);
    }
    .content-body {
        padding: 16px;
    }
    .stats-row {
        grid-template-columns: 1fr;
    }
    .quick-actions {
        grid-template-columns: repeat(2, 1fr);
    }
    .auth-card {
        padding: 24px;
    }
}

@media (max-width: 480px) {
    .quick-actions {
        grid-template-columns: 1fr;
    }
}

/* ============================================================
   Premium Modals & Overlays
   ============================================================ */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: rgba(0, 0, 0, 0.4);
    backdrop-filter: blur(8px);
    z-index: 1000;
    display: none;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.modal-overlay.active {
    display: flex;
    opacity: 1;
}

.modal-content {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-lg);
    width: 90%;
    max-width: 400px;
    padding: 32px;
    box-shadow: var(--shadow-card), 0 0 40px rgba(99, 102, 241, 0.1);
    transform: translateY(20px) scale(0.95);
    opacity: 0;
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.modal-overlay.active .modal-content {
    transform: translateY(0) scale(1);
    opacity: 1;
}

.modal-icon {
    font-size: 40px;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 16px;
    text-align: center;
}

.modal-title {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--color-text-primary);
    text-align: center;
    margin-bottom: 8px;
}

.modal-body {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    text-align: center;
    margin-bottom: 24px;
    line-height: 1.5;
}

.modal-actions {
    display: flex;
    gap: 12px;
    justify-content: center;
}

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

.btn-outline:hover {
    background: rgba(255, 255, 255, 0.05);
    border-color: var(--color-text-muted);
}

/* ============================================================
   Avatar Utilities
   ============================================================ */
.avatar-sm {
    width: 32px;
    height: 32px;
    border-radius: 8px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 13px;
    font-weight: 700;
    color: white;
    background: var(--gradient-primary);
    box-shadow: var(--shadow-sm);
}

.avatar-wrapper {
    display: flex;
    align-items: center;
    gap: 12px;
}

.table-row-hover {
    transition: background-color 0.2s ease, transform 0.2s ease;
}

.table-row-hover:hover {
    background-color: var(--color-bg-card-hover) !important;
    transform: translateY(-1px);
}