/* Design System CSS - Modern Glassmorphism */
/* Foundation for the modernized interface */

/* ===================== */
/* CSS Variables / Tokens */
/* ===================== */

:root {
    /* Colors - Dark Theme (Default) */
    --bg-primary: #0a0a14;
    --bg-secondary: #12121f;
    --bg-tertiary: #1a1a2e;
    --bg-card: rgba(26, 26, 46, 0.7);
    --bg-card-hover: rgba(26, 26, 46, 0.9);
    
    /* Text Colors */
    --text-primary: #ffffff;
    --text-secondary: #a0a0b0;
    --text-muted: #666680;
    
    /* Accent Colors */
    --accent-primary: #6366f1;
    --accent-secondary: #8b5cf6;
    --accent-gradient: linear-gradient(135deg, #6366f1, #8b5cf6, #a855f7);
    
    /* Status Colors */
    --success: #10b981;
    --success-bg: rgba(16, 185, 129, 0.15);
    --warning: #f59e0b;
    --warning-bg: rgba(245, 158, 11, 0.15);
    --danger: #ef4444;
    --danger-bg: rgba(239, 68, 68, 0.15);
    --info: #3b82f6;
    --info-bg: rgba(59, 130, 246, 0.15);
    
    /* Tier Colors */
    --tier-free: #666;
    --tier-pro: #6366f1;
    --tier-premium: #f59e0b;
    
    /* Borders */
    --border-color: rgba(255, 255, 255, 0.08);
    --border-color-light: rgba(255, 255, 255, 0.15);
    
    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.2);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.4);
    --shadow-glow: 0 0 30px rgba(99, 102, 241, 0.3);
    
    /* Spacing */
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
    --spacing-2xl: 48px;
    
    /* Border Radius */
    --radius-sm: 6px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --radius-full: 9999px;
    
    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 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;
    --font-size-4xl: 2.5rem;
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 200ms ease;
    --transition-slow: 300ms ease;
    --transition-spring: 300ms cubic-bezier(0.68, -0.55, 0.265, 1.55);
}

/* Light Theme */
[data-theme="light"] {
    --bg-primary: #f5f5f8;
    --bg-secondary: #ffffff;
    --bg-tertiary: #e8e8f0;
    --bg-card: rgba(255, 255, 255, 0.8);
    --bg-card-hover: rgba(255, 255, 255, 0.95);
    --text-primary: #1a1a2e;
    --text-secondary: #4a4a60;
    --text-muted: #9090a0;
    --border-color: rgba(0, 0, 0, 0.08);
    --border-color-light: rgba(0, 0, 0, 0.12);
}

/* ===================== */
/* Base Styles */
/* ===================== */

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

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

/* ===================== */
/* Layout Components */
/* ===================== */

.app-container {
    display: flex;
    min-height: 100vh;
}

.main-content {
    flex: 1;
    padding: var(--spacing-lg);
    margin-left: 280px;
    transition: margin-left var(--transition-base);
}

.main-content.sidebar-collapsed {
    margin-left: 80px;
}

@media (max-width: 768px) {
    .main-content {
        margin-left: 0;
        padding: var(--spacing-md);
    }
}

/* Page Header */
.page-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-xl);
}

.page-title {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.page-subtitle {
    color: var(--text-secondary);
    margin-top: var(--spacing-xs);
}

/* ===================== */
/* Sidebar Navigation */
/* ===================== */

.sidebar {
    position: fixed;
    left: 0;
    top: 0;
    bottom: 0;
    width: 280px;
    background: var(--bg-secondary);
    border-right: 1px solid var(--border-color);
    padding: var(--spacing-lg);
    display: flex;
    flex-direction: column;
    transition: width var(--transition-base);
    z-index: 100;
}

.sidebar.collapsed {
    width: 80px;
}

.sidebar-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding-bottom: var(--spacing-lg);
    border-bottom: 1px solid var(--border-color);
    margin-bottom: var(--spacing-lg);
}

.sidebar-logo {
    font-size: var(--font-size-2xl);
}

.sidebar-title {
    font-size: var(--font-size-lg);
    font-weight: 600;
}

.sidebar.collapsed .sidebar-title {
    display: none;
}

.sidebar-nav {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.nav-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    text-decoration: none;
    transition: all var(--transition-fast);
}

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

.nav-item.active {
    background: var(--accent-primary);
    color: white;
}

.nav-icon {
    font-size: var(--font-size-xl);
    width: 24px;
    text-align: center;
}

.sidebar.collapsed .nav-label {
    display: none;
}

.nav-badge {
    margin-left: auto;
    background: var(--danger);
    color: white;
    font-size: var(--font-size-xs);
    padding: 2px 8px;
    border-radius: var(--radius-full);
}

/* ===================== */
/* Glassmorphism Cards */
/* ===================== */

.glass-card {
    background: var(--bg-card);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    transition: all var(--transition-base);
}

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

.glass-card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-md);
}

.glass-card-title {
    font-size: var(--font-size-lg);
    font-weight: 600;
}

.glass-card-body {
    color: var(--text-secondary);
}

/* ===================== */
/* Stats Cards */
/* ===================== */

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

.stat-card {
    background: var(--bg-card);
    backdrop-filter: blur(12px);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    position: relative;
    overflow: hidden;
}

.stat-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--accent-gradient);
}

.stat-icon {
    font-size: var(--font-size-2xl);
    margin-bottom: var(--spacing-sm);
}

.stat-value {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    margin-bottom: var(--spacing-xs);
}

.stat-value.positive {
    color: var(--success);
}

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

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

.stat-change {
    position: absolute;
    top: var(--spacing-md);
    right: var(--spacing-md);
    font-size: var(--font-size-sm);
    padding: 2px 8px;
    border-radius: var(--radius-full);
}

.stat-change.up {
    background: var(--success-bg);
    color: var(--success);
}

.stat-change.down {
    background: var(--danger-bg);
    color: var(--danger);
}

/* ===================== */
/* Buttons */
/* ===================== */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-lg);
    font-size: var(--font-size-base);
    font-weight: 500;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
    text-decoration: none;
}

.btn-primary {
    background: var(--accent-gradient);
    color: white;
    box-shadow: 0 4px 15px rgba(99, 102, 241, 0.4);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(99, 102, 241, 0.5);
}

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

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

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

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

.btn-sm {
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: var(--font-size-sm);
}

.btn-lg {
    padding: var(--spacing-lg) var(--spacing-xl);
    font-size: var(--font-size-lg);
}

/* ===================== */
/* Form Elements */
/* ===================== */

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

.form-label {
    display: block;
    margin-bottom: var(--spacing-sm);
    font-weight: 500;
    color: var(--text-secondary);
}

.form-input {
    width: 100%;
    padding: var(--spacing-md);
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-size: var(--font-size-base);
    transition: all var(--transition-fast);
}

.form-input:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.2);
}

.form-select {
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%23666' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
    padding-right: 36px;
}

/* ===================== */
/* Badges */
/* ===================== */

.badge {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 4px 10px;
    font-size: var(--font-size-xs);
    font-weight: 600;
    border-radius: var(--radius-full);
}

.badge-success {
    background: var(--success-bg);
    color: var(--success);
}

.badge-warning {
    background: var(--warning-bg);
    color: var(--warning);
}

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

.badge-info {
    background: var(--info-bg);
    color: var(--info);
}

.badge-free {
    background: rgba(102, 102, 102, 0.2);
    color: var(--tier-free);
}

.badge-pro {
    background: rgba(99, 102, 241, 0.2);
    color: var(--tier-pro);
}

.badge-premium {
    background: rgba(245, 158, 11, 0.2);
    color: var(--tier-premium);
}

/* ===================== */
/* Tables */
/* ===================== */

.table-container {
    overflow-x: auto;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
}

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

.table th,
.table td {
    padding: var(--spacing-md);
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.table th {
    background: var(--bg-tertiary);
    font-weight: 600;
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.table tr:hover td {
    background: var(--bg-card);
}

/* ===================== */
/* Progress Ring */
/* ===================== */

.progress-ring {
    position: relative;
    width: 80px;
    height: 80px;
}

.progress-ring svg {
    transform: rotate(-90deg);
}

.progress-ring-bg {
    fill: none;
    stroke: var(--bg-tertiary);
    stroke-width: 8;
}

.progress-ring-fill {
    fill: none;
    stroke: var(--accent-primary);
    stroke-width: 8;
    stroke-linecap: round;
    transition: stroke-dashoffset var(--transition-slow);
}

.progress-ring-text {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: var(--font-size-lg);
    font-weight: 700;
}

/* ===================== */
/* Toast Notifications */
/* ===================== */

.toast-container {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 1000;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.toast {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md) var(--spacing-lg);
    background: var(--bg-card);
    backdrop-filter: blur(12px);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    animation: toast-in 0.3s ease;
}

.toast.success {
    border-left: 4px solid var(--success);
}

.toast.error {
    border-left: 4px solid var(--danger);
}

.toast.warning {
    border-left: 4px solid var(--warning);
}

@keyframes toast-in {
    from {
        opacity: 0;
        transform: translateX(100%);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

/* ===================== */
/* Modal */
/* ===================== */

.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-base);
}

.modal-overlay.active {
    opacity: 1;
    visibility: visible;
}

.modal {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    width: 100%;
    max-width: 500px;
    max-height: 90vh;
    overflow-y: auto;
    transform: scale(0.9);
    transition: transform var(--transition-base);
}

.modal-overlay.active .modal {
    transform: scale(1);
}

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

.modal-title {
    font-size: var(--font-size-xl);
    font-weight: 600;
}

.modal-close {
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: var(--font-size-xl);
    cursor: pointer;
    padding: var(--spacing-sm);
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
}

.modal-close:hover {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

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

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

/* ===================== */
/* Animations */
/* ===================== */

@keyframes fade-in {
    from { opacity: 0; }
    to { opacity: 1; }
}

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

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

.animate-fade-in {
    animation: fade-in 0.3s ease;
}

.animate-slide-up {
    animation: slide-up 0.3s ease;
}

.animate-pulse {
    animation: pulse 2s infinite;
}

/* Stagger animations for lists */
.stagger-list > * {
    animation: slide-up 0.3s ease forwards;
    opacity: 0;
}

.stagger-list > *:nth-child(1) { animation-delay: 0.05s; }
.stagger-list > *:nth-child(2) { animation-delay: 0.1s; }
.stagger-list > *:nth-child(3) { animation-delay: 0.15s; }
.stagger-list > *:nth-child(4) { animation-delay: 0.2s; }
.stagger-list > *:nth-child(5) { animation-delay: 0.25s; }