/* ============================================
   REDESIGN - Modern Dark/Light Theme
   michaelhoffmann.me staging
   ============================================ */

/* CSS Custom Properties */
:root {
    /* Dark Theme (Default) */
    --bg-primary: #0d0d14;
    --bg-secondary: #151520;
    --bg-tertiary: #1a1a2e;
    --bg-card: #16162a;
    --bg-card-hover: #1c1c36;
    --bg-sidebar: #0a0a12;
    --bg-input: #1e1e32;

    --text-primary: #e8e8ef;
    --text-secondary: #9898a8;
    --text-muted: #5a5a6e;
    --text-accent: #00d4ff;

    --border-color: #2a2a44;
    --border-subtle: #222238;

    --accent-primary: #00d4ff;
    --accent-secondary: #7c3aed;
    --accent-success: #10b981;
    --accent-warning: #f59e0b;
    --accent-danger: #ef4444;

    --gradient-primary: linear-gradient(135deg, #00d4ff 0%, #7c3aed 100%);
    --gradient-card: linear-gradient(180deg, rgba(0,212,255,0.05) 0%, transparent 100%);

    --shadow-sm: 0 2px 8px rgba(0,0,0,0.3);
    --shadow-md: 0 4px 16px rgba(0,0,0,0.4);
    --shadow-lg: 0 8px 32px rgba(0,0,0,0.5);
    --shadow-glow: 0 0 20px rgba(0,212,255,0.15);

    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --radius-xl: 24px;

    --transition-fast: 0.15s ease;
    --transition-normal: 0.25s ease;
    --transition-slow: 0.4s ease;

    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

    --sidebar-width: 260px;
    --sidebar-collapsed: 72px;
    --header-height: 64px;
}

/* Light Theme */
[data-theme="light"] {
    --bg-primary: #f0f2f5;
    --bg-secondary: #ffffff;
    --bg-tertiary: #e8eaf0;
    --bg-card: #ffffff;
    --bg-card-hover: #f8f9fc;
    --bg-sidebar: #ffffff;
    --bg-input: #f5f7fa;

    --text-primary: #1a1a2e;
    --text-secondary: #5a5a6e;
    --text-muted: #9898a8;
    --text-accent: #0891b2;

    --border-color: #e2e4ea;
    --border-subtle: #f0f2f5;

    --shadow-sm: 0 2px 8px rgba(0,0,0,0.06);
    --shadow-md: 0 4px 16px rgba(0,0,0,0.08);
    --shadow-lg: 0 8px 32px rgba(0,0,0,0.1);
    --shadow-glow: 0 0 20px rgba(0,212,255,0.1);
}

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

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-sans);
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    overflow-x: hidden;
    transition: background var(--transition-normal), color var(--transition-normal);
}

/* Background Pattern */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background:
        radial-gradient(ellipse at 20% 20%, rgba(0,212,255,0.08) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 80%, rgba(124,58,237,0.06) 0%, transparent 50%),
        radial-gradient(ellipse at 50% 50%, rgba(0,0,0,0) 0%, transparent 100%);
    pointer-events: none;
    z-index: -1;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.3;
    letter-spacing: -0.02em;
}

h1 { font-size: 2.25rem; }
h2 { font-size: 1.75rem; }
h3 { font-size: 1.375rem; }
h4 { font-size: 1.125rem; }
h5 { font-size: 1rem; }
h6 { font-size: 0.875rem; }

p { color: var(--text-secondary); }

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

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

/* ============================================
   LAYOUT - Sidebar + Main Content
   ============================================ */

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

/* Sidebar */
.sidebar {
    position: fixed;
    left: 0;
    top: 0;
    width: var(--sidebar-width);
    height: 100vh;
    background: var(--bg-sidebar);
    border-right: 1px solid var(--border-subtle);
    display: flex;
    flex-direction: column;
    z-index: 1000;
    transition: width var(--transition-normal), background var(--transition-normal);
    overflow: hidden;
}

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

.sidebar-header {
    padding: 1.25rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    border-bottom: 1px solid var(--border-subtle);
    min-height: 72px;
}

.sidebar-logo {
    width: 36px;
    height: 36px;
    border-radius: var(--radius-md);
    background: var(--gradient-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1rem;
    color: white;
    flex-shrink: 0;
}

.sidebar-title {
    font-size: 1.125rem;
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    white-space: nowrap;
    opacity: 1;
    transition: opacity var(--transition-fast);
}

.sidebar.collapsed .sidebar-title {
    opacity: 0;
}

.sidebar-nav {
    flex: 1;
    padding: 1rem 0.75rem;
    overflow-y: auto;
    overflow-x: hidden;
}

.nav-section {
    margin-bottom: 1.5rem;
}

.nav-section-title {
    font-size: 0.7rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--text-muted);
    padding: 0 0.5rem;
    margin-bottom: 0.5rem;
    white-space: nowrap;
    opacity: 1;
    transition: opacity var(--transition-fast);
}

.sidebar.collapsed .nav-section-title,
.sidebar.collapsed .nav-item-text,
.sidebar.collapsed .nav-badge {
    opacity: 0;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1rem;
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition-fast);
    margin-bottom: 4px;
    position: relative;
    white-space: nowrap;
}

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

.nav-item.active {
    background: var(--gradient-primary);
    color: white;
    box-shadow: var(--shadow-glow);
}

.nav-item.active::before {
    content: '';
    position: absolute;
    left: -0.75rem;
    top: 50%;
    transform: translateY(-50%);
    width: 3px;
    height: 60%;
    background: var(--accent-primary);
    border-radius: 0 2px 2px 0;
}

.nav-icon {
    width: 20px;
    height: 20px;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
}

.nav-icon svg {
    width: 100%;
    height: 100%;
}

.nav-item-text {
    flex: 1;
    font-size: 0.9rem;
    font-weight: 500;
    transition: opacity var(--transition-fast);
}

.nav-badge {
    background: var(--accent-danger);
    color: white;
    font-size: 0.7rem;
    font-weight: 600;
    padding: 0.15rem 0.4rem;
    border-radius: 10px;
    transition: opacity var(--transition-fast);
}

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

.sidebar-toggle {
    width: 100%;
    padding: 0.625rem;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    font-size: 0.8rem;
    font-weight: 500;
    transition: all var(--transition-fast);
}

.sidebar-toggle:hover {
    background: var(--bg-card-hover);
    color: var(--text-primary);
}

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

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

/* Header */
.main-header {
    position: sticky;
    top: 0;
    height: var(--header-height);
    background: rgba(13, 13, 20, 0.8);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-subtle);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 1.5rem;
    z-index: 100;
    transition: background var(--transition-normal);
}

[data-theme="light"] .main-header {
    background: rgba(255, 255, 255, 0.8);
}

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

.page-title {
    font-size: 1.25rem;
    font-weight: 600;
}

.header-right {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

/* Theme Toggle */
.theme-toggle {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-md);
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
}

.theme-toggle:hover {
    background: var(--bg-card-hover);
    color: var(--accent-primary);
}

/* User Menu */
.user-menu {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.5rem 0.75rem;
    background: var(--bg-tertiary);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.user-menu:hover {
    background: var(--bg-card-hover);
}

.user-avatar {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: var(--gradient-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 0.8rem;
    color: white;
}

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

.user-name {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-primary);
}

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

/* Page Content */
.page-content {
    padding: 1.5rem;
}

.page-header {
    margin-bottom: 1.5rem;
}

.page-header h1 {
    margin-bottom: 0.25rem;
}

.page-description {
    color: var(--text-muted);
    font-size: 0.9rem;
}

/* ============================================
   CARDS
   ============================================ */

.card {
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    padding: 1.25rem;
    transition: all var(--transition-normal);
}

.card:hover {
    background: var(--bg-card-hover);
    border-color: var(--border-color);
    box-shadow: var(--shadow-md);
}

.card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1rem;
}

.card-title {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
}

.card-subtitle {
    font-size: 0.8rem;
    color: var(--text-muted);
}

/* Stats Cards */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.stat-card {
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    padding: 1.25rem;
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.stat-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--gradient-primary);
    opacity: 0;
    transition: opacity var(--transition-fast);
}

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

.stat-card:hover::before {
    opacity: 1;
}

.stat-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-md);
    background: var(--bg-tertiary);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--accent-primary);
    flex-shrink: 0;
}

.stat-content {
    flex: 1;
}

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

.stat-label {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-top: 0.25rem;
}

.stat-change {
    font-size: 0.75rem;
    font-weight: 500;
    margin-top: 0.5rem;
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

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

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

/* ============================================
   BUTTONS
   ============================================ */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.625rem 1.25rem;
    font-size: 0.875rem;
    font-weight: 500;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
    border: none;
    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-md), var(--shadow-glow);
}

.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(--accent-primary);
}

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

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

.btn-sm {
    padding: 0.375rem 0.75rem;
    font-size: 0.8rem;
}

.btn-lg {
    padding: 0.875rem 1.75rem;
    font-size: 1rem;
}

.btn-icon {
    width: 36px;
    height: 36px;
    padding: 0;
    border-radius: var(--radius-md);
}

/* ============================================
   FORM ELEMENTS
   ============================================ */

.form-group {
    margin-bottom: 1rem;
}

.form-label {
    display: block;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.form-input {
    width: 100%;
    padding: 0.75rem 1rem;
    font-size: 0.9rem;
    background: var(--bg-input);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    transition: all var(--transition-fast);
}

.form-input:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px rgba(0, 212, 255, 0.1);
}

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

.form-select {
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%239898a8' stroke-width='2'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 0.75rem center;
    padding-right: 2.5rem;
}

/* ============================================
   PROGRESS & DATA VISUALIZATION
   ============================================ */

.progress-bar {
    height: 8px;
    background: var(--bg-tertiary);
    border-radius: 4px;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: var(--gradient-primary);
    border-radius: 4px;
    transition: width var(--transition-slow);
}

.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: 6;
}

.progress-ring-fill {
    fill: none;
    stroke: url(#progressGradient);
    stroke-width: 6;
    stroke-linecap: round;
    transition: stroke-dashoffset var(--sloe);
}

.progress-ring-value {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 1.125rem;
    font-weight: 700;
}

/* Heatmap Grid */
.heatmap-grid {
    display: grid;
    gap: 3px;
}

.heatmap-cell {
    aspect-ratio: 1;
    border-radius: 3px;
    background: var(--bg-tertiary);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.heatmap-cell:hover {
    transform: scale(1.2);
    z-index: 1;
}

.heatmap-cell.level-0 { background: var(--bg-tertiary); }
.heatmap-cell.level-1 { background: rgba(239, 68, 68, 0.3); }
.heatmap-cell.level-2 { background: rgba(245, 158, 11, 0.4); }
.heatmap-cell.level-3 { background: rgba(16, 185, 129, 0.5); }
.heatmap-cell.level-4 { background: rgba(0, 212, 255, 0.7); }

/* ============================================
   TABLES
   ============================================ */

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

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

.table th,
.table td {
    padding: 1rem;
    text-align: left;
}

.table th {
    background: var(--bg-tertiary);
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-muted);
    border-bottom: 1px solid var(--border-color);
}

.table td {
    background: var(--bg-card);
    border-bottom: 1px solid var(--border-subtle);
}

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

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

/* ============================================
   BADGES & TAGS
   ============================================ */

.badge {
    display: inline-flex;
    align-items: center;
    gap: 0.375rem;
    padding: 0.25rem 0.625rem;
    font-size: 0.75rem;
    font-weight: 500;
    border-radius: 20px;
    background: var(--bg-tertiary);
    color: var(--text-secondary);
}

.badge-primary {
    background: rgba(0, 212, 255, 0.15);
    color: var(--accent-primary);
}

.badge-success {
    background: rgba(16, 185, 129, 0.15);
    color: var(--accent-success);
}

.badge-warning {
    background: rgba(245, 158, 11, 0.15);
    color: var(--accent-warning);
}

.badge-danger {
    background: rgba(239, 68, 68, 0.15);
    color: var(--accent-danger);
}

/* ============================================
   ANIMATIONS
   ============================================ */

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

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

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

.animate-fadeIn {
    animation: fadeIn var(--transition-normal) ease-out;
}

.animate-slideUp {
    animation: slideUp var(--transition-normal) ease-out;
}

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

/* Stagger animation delays */
.stagger-1 { animation-delay: 0.05s; }
.stagger-2 { animation-delay: 0.1s; }
.stagger-3 { animation-delay: 0.15s; }
.stagger-4 { animation-delay: 0.2s; }
.stagger-5 { animation-delay: 0.25s; }

/* Skeleton loading */
.skeleton {
    background: linear-gradient(90deg, var(--bg-tertiary) 25%, var(--bg-card-hover) 50%, var(--bg-tertiary) 75%);
    background-size: 200% 100%;
    animation: skeleton 1.5s ease-in-out infinite;
    border-radius: var(--radius-md);
}

@keyframes skeleton {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

/* ============================================
   UTILITIES
   ============================================ */

.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.justify-center { justify-content: center; }
.gap-1 { gap: 0.25rem; }
.gap-2 { gap: 0.5rem; }
.gap-3 { gap: 0.75rem; }
.gap-4 { gap: 1rem; }
.gap-6 { gap: 1.5rem; }

.grid { display: grid; }
.grid-cols-2 { grid-template-columns: repeat(2, 1fr); }
.grid-cols-3 { grid-template-columns: repeat(3, 1fr); }
.grid-cols-4 { grid-template-columns: repeat(4, 1fr); }

.text-center { text-align: center; }
.text-right { text-align: right; }

.text-sm { font-size: 0.875rem; }
.text-xs { font-size: 0.75rem; }
.text-lg { font-size: 1.125rem; }
.text-xl { font-size: 1.25rem; }

.font-medium { font-weight: 500; }
.font-semibold { font-weight: 600; }
.font-bold { font-weight: 700; }

.text-muted { color: var(--text-muted); }
.text-secondary { color: var(--text-secondary); }
.text-accent { color: var(--accent-primary); }

.mt-1 { margin-top: 0.25rem; }
.mt-2 { margin-top: 0.5rem; }
.mt-4 { margin-top: 1rem; }
.mt-6 { margin-top: 1.5rem; }
.mb-2 { margin-bottom: 0.5rem; }
.mb-4 { margin-bottom: 1rem; }
.mb-6 { margin-bottom: 1.5rem; }
.ml-auto { margin-left: auto; }

.p-4 { padding: 1rem; }
.p-6 { padding: 1.5rem; }
.px-4 { padding-left: 1rem; padding-right: 1rem; }
.py-2 { padding-top: 0.5rem; padding-bottom: 0.5rem; }

.rounded { border-radius: var(--radius-md); }
.rounded-lg { border-radius: var(--radius-lg); }
.rounded-full { border-radius: 9999px; }

.w-full { width: 100%; }
.h-full { height: 100%; }

.overflow-hidden { overflow: hidden; }
.overflow-auto { overflow: auto; }

.relative { position: relative; }
.absolute { position: absolute; }

.opacity-50 { opacity: 0.5; }
.opacity-75 { opacity: 0.75; }

.truncate {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

/* Responsive */
@media (max-width: 1024px) {
    .sidebar {
        width: var(--sidebar-collapsed);
    }

    .sidebar .sidebar-title,
    .sidebar .nav-section-title,
    .sidebar .nav-item-text,
    .sidebar .nav-badge {
        opacity: 0;
    }

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

@media (max-width: 768px) {
    .stats-grid {
        grid-template-columns: 1fr;
    }

    .grid-cols-2,
    .grid-cols-3,
    .grid-cols-4 {
        grid-template-columns: 1fr;
    }

    .page-content {
        padding: 1rem;
    }

    .main-header {
        padding: 0 1rem;
    }
}