@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=Playfair+Display:ital,wght@0,400;0,600;0,700;1,400;1,600;1,700&display=swap');

/* Default Theme Settings (Dark Mode First) */
:root {
    --font-serif: 'Playfair Display', Georgia, serif;
    --font-sans: 'Inter', system-ui, -apple-system, sans-serif;
    
    /* Transition speeds */
    --transition-speed: 0.3s;
    
    /* Dark Theme Variables */
    --bg-app: #0d0f12;
    --bg-nav: rgba(18, 22, 28, 0.85);
    --bg-sidebar: #12161c;
    --bg-card: rgba(26, 32, 44, 0.65);
    --border-color: rgba(255, 255, 255, 0.08);
    --text-primary: #f7fafc;
    --text-secondary: #a0aec0;
    --text-muted: #718096;
    --accent: #d4af37; /* Warm Gold */
    --accent-rgb: 212, 175, 55;
    --accent-red: #e53e3e; /* Crimson */
    --accent-red-rgb: 229, 62, 62;
    --accent-green: #38a169;
    --shadow-glow: rgba(214, 175, 55, 0.15);
    --card-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.37);
}

/* Light Theme Variables */
[data-theme="light"] {
    --bg-app: #f5f6f8;
    --bg-nav: rgba(255, 255, 255, 0.85);
    --bg-sidebar: #ffffff;
    --bg-card: rgba(255, 255, 255, 0.75);
    --border-color: rgba(0, 0, 0, 0.08);
    --text-primary: #1a202c;
    --text-secondary: #4a5568;
    --text-muted: #718096;
    --accent: #b08d24; /* Darker Gold for contrast */
    --accent-rgb: 176, 141, 36;
    --accent-red: #c53030;
    --accent-red-rgb: 197, 48, 48;
    --accent-green: #2f855a;
    --shadow-glow: rgba(176, 141, 36, 0.1);
    --card-shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.07);
}

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

body {
    font-family: var(--font-sans);
    background-color: var(--bg-app);
    color: var(--text-primary);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    transition: background-color var(--transition-speed), color var(--transition-speed);
    overflow-x: hidden;
}

/* Typography styles */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-serif);
    font-weight: 600;
    letter-spacing: -0.02em;
}

.serif-italic {
    font-family: var(--font-serif);
    font-style: italic;
}

.text-gold {
    color: var(--accent);
}

/* Layout Framework */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 70px;
    background: var(--bg-nav);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 2rem;
    z-index: 1000;
    transition: background var(--transition-speed), border-color var(--transition-speed);
}

.nav-brand {
    font-family: var(--font-serif);
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: 0.05em;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.nav-brand span.logo-volt {
    font-style: italic;
    color: var(--accent);
    text-shadow: 0 0 10px var(--shadow-glow);
}

.nav-controls {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

/* Theme Toggle Button */
.theme-switch {
    position: relative;
    width: 60px;
    height: 30px;
    background-color: rgba(113, 128, 150, 0.3);
    border-radius: 15px;
    cursor: pointer;
    display: flex;
    align-items: center;
    padding: 3px;
    transition: background-color var(--transition-speed);
}

.theme-switch-thumb {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background-color: var(--accent);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: transform var(--transition-speed);
    font-size: 0.75rem;
    color: #1a202c;
    box-shadow: 0 2px 4px rgba(0,0,0,0.2);
}

[data-theme="light"] .theme-switch-thumb {
    transform: translateX(30px);
}

/* Sidebar Framework */
.app-container {
    display: flex;
    margin-top: 70px;
    min-height: calc(100vh - 70px);
}

.sidebar {
    width: 250px;
    background-color: var(--bg-sidebar);
    border-right: 1px solid var(--border-color);
    padding: 2rem 1rem;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    flex-shrink: 0;
    transition: background-color var(--transition-speed), border-color var(--transition-speed);
}

.sidebar-nav-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 0.85rem 1.25rem;
    color: var(--text-secondary);
    text-decoration: none;
    border-radius: 8px;
    font-size: 0.95rem;
    font-weight: 500;
    transition: all 0.2s ease;
}

.sidebar-nav-item i {
    width: 20px;
    font-size: 1.1rem;
}

.sidebar-nav-item:hover {
    color: var(--text-primary);
    background-color: rgba(255, 255, 255, 0.03);
}

.sidebar-nav-item.active {
    color: var(--accent);
    background-color: rgba(212, 175, 55, 0.08);
    border-left: 3px solid var(--accent);
    border-top-left-radius: 0;
    border-bottom-left-radius: 0;
}

.main-content {
    flex-grow: 1;
    padding: 2.5rem;
    overflow-y: auto;
}

/* Glassmorphic Cards & Grid System */
.kpi-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.card {
    background: var(--bg-card);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 1.5rem;
    box-shadow: var(--card-shadow);
    transition: transform 0.2s ease, box-shadow 0.2s ease, background-color var(--transition-speed), border-color var(--transition-speed);
}

.card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 40px 0 rgba(0, 0, 0, 0.3), 0 0 15px var(--shadow-glow);
}

.kpi-title {
    font-size: 0.85rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 0.5rem;
}

.kpi-value {
    font-family: var(--font-serif);
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.25rem;
}

.kpi-sub {
    font-size: 0.75rem;
    color: var(--text-muted);
}

.kpi-delta-up {
    color: var(--accent-green);
    font-weight: 600;
}

.kpi-delta-down {
    color: var(--accent-red);
    font-weight: 600;
}

/* Grid Layouts for Modules */
.dashboard-grid {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 1.5rem;
    margin-bottom: 2rem;
}

@media (max-width: 1024px) {
    .dashboard-grid {
        grid-template-columns: 1fr;
    }
}

.chart-card {
    height: 420px;
    display: flex;
    flex-direction: column;
}

.chart-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
}

.chart-title {
    font-size: 1.15rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.chart-container {
    flex-grow: 1;
    position: relative;
    width: 100%;
    height: 100%;
}

/* Vis.js network visualizer box */
#network-graph {
    width: 100%;
    height: 420px;
    background-color: rgba(0,0,0,0.05);
    border-radius: 8px;
    border: 1px dashed var(--border-color);
}

/* Styled Table System */
.table-card {
    margin-bottom: 2rem;
    overflow: hidden;
}

.table-responsive {
    overflow-x: auto;
    width: 100%;
}

.table-custom {
    width: 100%;
    border-collapse: collapse;
    text-align: left;
    font-size: 0.9rem;
}

.table-custom th {
    padding: 1rem;
    border-bottom: 1px solid var(--border-color);
    font-weight: 600;
    color: var(--text-secondary);
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.table-custom td {
    padding: 1rem;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-primary);
}

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

.table-custom tr:hover td {
    background-color: rgba(255, 255, 255, 0.02);
}

/* Comparison layouts */
.comparison-selectors {
    display: flex;
    gap: 1.5rem;
    align-items: center;
    margin-bottom: 2rem;
    padding: 1.5rem;
    background: var(--bg-card);
    border-radius: 12px;
    border: 1px solid var(--border-color);
}

.form-select-custom {
    padding: 0.75rem 1.5rem;
    background: var(--bg-app);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    border-radius: 8px;
    outline: none;
    font-family: var(--font-sans);
    cursor: pointer;
    font-size: 0.95rem;
    transition: border-color 0.2s ease;
}

.form-select-custom:focus {
    border-color: var(--accent);
}

.btn-primary-custom {
    padding: 0.75rem 1.5rem;
    background: var(--accent);
    color: #1a202c;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-family: var(--font-sans);
    font-weight: 600;
    font-size: 0.95rem;
    transition: all 0.2s ease;
    box-shadow: 0 4px 12px rgba(212, 175, 55, 0.2);
}

.btn-primary-custom:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(212, 175, 55, 0.4);
}

/* Authentication Layout */
.auth-wrapper {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--bg-app);
    padding: 1.5rem;
}

.auth-card {
    width: 100%;
    max-width: 420px;
    background: var(--bg-card);
    backdrop-filter: blur(15px);
    -webkit-backdrop-filter: blur(15px);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 2.5rem;
    box-shadow: var(--card-shadow);
}

.auth-header {
    text-align: center;
    margin-bottom: 2rem;
}

.auth-logo {
    font-family: var(--font-serif);
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.auth-logo span.logo-volt {
    font-style: italic;
    color: var(--accent);
}

.auth-sub {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-label {
    display: block;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

.form-control-custom {
    width: 100%;
    padding: 0.75rem 1rem;
    background: rgba(0, 0, 0, 0.15);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    border-radius: 8px;
    outline: none;
    font-family: var(--font-sans);
    transition: border-color 0.2s ease;
}

.form-control-custom:focus {
    border-color: var(--accent);
}

.auth-btn {
    width: 100%;
    padding: 0.85rem;
    background: var(--accent);
    color: #1a202c;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-family: var(--font-sans);
    font-weight: 600;
    font-size: 1rem;
    transition: all 0.2s ease;
}

.auth-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 15px var(--shadow-glow);
}

.auth-footer {
    text-align: center;
    margin-top: 1.5rem;
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.auth-footer a {
    color: var(--accent);
    text-decoration: none;
    font-weight: 600;
}

.auth-footer a:hover {
    text-decoration: underline;
}

.alert-box {
    padding: 0.75rem 1rem;
    background-color: rgba(229, 62, 62, 0.1);
    border: 1px solid var(--accent-red);
    color: var(--accent-red);
    border-radius: 8px;
    font-size: 0.85rem;
    margin-bottom: 1.5rem;
    text-align: center;
}

/* User logout widget info */
.user-widget {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.user-widget a {
    color: var(--accent-red);
    text-decoration: none;
    font-weight: 600;
    transition: color 0.2s ease;
}

.user-widget a:hover {
    color: #ff5f5f;
}

.wordcloud-container {
    height: 100%;
    display: flex;
    flex-wrap: wrap;
    align-content: center;
    justify-content: center;
    gap: 0.5rem 1rem;
    padding: 1rem;
}

.word-pill {
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-weight: 500;
    background-color: rgba(255, 255, 255, 0.04);
    border: 1px solid var(--border-color);
}