:root {
    --bg-dark: #020617;
    --card-bg: rgba(30, 41, 59, 0.4);
    --card-border: rgba(255, 255, 255, 0.08);
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;

    /* Category Colors (Neon/Vibrant) */
    --color-electricity: #fbbf24;
    --color-fuel: #f87171;
    --color-transport: #4ade80;

    --accent: #3b82f6;
    --accent-glow: rgba(59, 130, 246, 0.15);

    --font-heading: 'Clash Display', 'Inter', sans-serif;
    --font-body: 'Instrument Sans', 'Inter', sans-serif;

    /* Animation Speeds */
    --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
}

/* Light Theme */
[data-theme="light"] {
    --bg-dark: #f1f5f9;
    --card-bg: rgba(255, 255, 255, 0.8);
    --card-border: rgba(0, 0, 0, 0.1);
    --text-primary: #0f172a;
    --text-secondary: #64748b;
    --accent-glow: rgba(59, 130, 246, 0.2);
}

[data-theme="light"] body {
    background-image:
        radial-gradient(circle at 10% 20%, rgba(59, 130, 246, 0.1) 0%, transparent 40%),
        radial-gradient(circle at 90% 80%, rgba(251, 191, 36, 0.06) 0%, transparent 40%);
}

[data-theme="light"] th {
    background: rgba(241, 245, 249, 0.95);
}

[data-theme="light"] .segmented-control,
[data-theme="light"] .view-toggle-group {
    background: rgba(255, 255, 255, 0.8);
}

[data-theme="light"] .map-legend,
[data-theme="light"] .mapboxgl-popup-content {
    background: rgba(255, 255, 255, 0.95) !important;
}

[data-theme="light"] h1 {
    background: linear-gradient(to right, #0f172a, #475569);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

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

body {
    font-family: var(--font-body);
    background-color: var(--bg-dark);
    color: var(--text-primary);
    min-height: 100vh;
    padding: 2rem;
    background-image:
        radial-gradient(circle at 10% 20%, rgba(59, 130, 246, 0.15) 0%, transparent 40%),
        radial-gradient(circle at 90% 80%, rgba(251, 191, 36, 0.08) 0%, transparent 40%);
    background-attachment: fixed;
}

.container {
    max-width: 1000px;
    margin: 0 auto;
}

/* Header */
header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2.5rem;
}

h1 {
    font-family: var(--font-heading);
    font-weight: 600;
    font-size: 2rem;
    letter-spacing: -0.02em;
    background: linear-gradient(to right, #fff, #94a3b8);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.subtitle {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-top: 0.25rem;
}

/* Header Actions */
.header-actions {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

/* Refresh Button */
.refresh-btn {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--card-border);
    color: var(--text-primary);
    padding: 0.6rem 1rem;
    border-radius: 12px;
    cursor: pointer;
    font-family: var(--font-body);
    font-weight: 500;
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: all 0.3s var(--ease-out);
}

.refresh-btn:hover {
    background: rgba(255, 255, 255, 0.08);
    transform: translateY(-1px);
}

.refresh-btn svg {
    transition: transform 0.6s var(--ease-out);
}

.refresh-btn:hover svg {
    transform: rotate(180deg);
}


/* Segmented Control (The Feature Piece) */
.controls-wrapper {
    display: flex;
    justify-content: center;
    align-items: center;
    margin-bottom: 2rem;
}

.segmented-control {
    background: rgba(15, 23, 42, 0.6);
    backdrop-filter: blur(12px);
    padding: 0.3rem;
    border-radius: 100px;
    border: 1px solid var(--card-border);
    display: inline-flex;
    gap: 0.3rem;
    position: relative;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
}

.segment-btn {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    padding: 0.6rem 1.5rem;
    border-radius: 100px;
    cursor: pointer;
    font-family: var(--font-body);
    font-weight: 500;
    font-size: 0.95rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: all 0.3s var(--ease-out);
    min-width: 140px;
    justify-content: center;
}

.segment-btn .icon {
    font-size: 1.1em;
    opacity: 0.7;
}

.segment-btn:hover {
    color: var(--text-primary);
}

.segment-btn.active {
    background: rgba(255, 255, 255, 0.1);
    color: white;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
}

/* Dynamic Accent Coloring for Active Tabs */
.segment-btn.active[data-category="electricity"] {
    background: rgba(251, 191, 36, 0.15);
    color: #fbbf24;
}

.segment-btn.active[data-category="fuel"] {
    background: rgba(248, 113, 113, 0.15);
    color: #f87171;
}

.segment-btn.active[data-category="transport"] {
    background: rgba(74, 222, 128, 0.15);
    color: #4ade80;
}


/* Main Card */
.main-card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 24px;
    backdrop-filter: blur(20px);
    overflow: hidden;
    /* For table border-radius */
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.3);
    min-height: 400px;
}

/* Stats Bar */
.stats-bar {
    display: flex;
    justify-content: center;
    gap: 2rem;
    margin-bottom: 1.5rem;
    padding: 1rem 1.5rem;
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 16px;
    backdrop-filter: blur(20px);
}

.stat-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.25rem;
}

.stat-label {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-secondary);
}

.stat-value {
    font-family: var(--font-heading);
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
}

.stat-item.cheapest .stat-value {
    color: #22c55e;
}

.stat-item.expensive .stat-value {
    color: #ef4444;
}

.stat-item.last-updated .stat-value {
    color: var(--accent);
    font-size: 0.95rem;
}

.toolbar {
    padding: 1rem 2rem;
    border-bottom: 1px solid var(--card-border);
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
    background: rgba(255, 255, 255, 0.01);
    flex-wrap: wrap;
}

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

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

.toolbar h2 {
    font-family: var(--font-heading);
    font-weight: 500;
    font-size: 1.1rem;
    color: var(--text-primary);
    margin: 0;
}

.item-count {
    background: var(--accent);
    color: white;
    font-size: 0.75rem;
    font-weight: 600;
    padding: 0.2rem 0.5rem;
    border-radius: 100px;
}

/* Search Box */
.search-box {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--card-border);
    border-radius: 8px;
    padding: 0.4rem 0.75rem;
    transition: all 0.2s;
}

.search-box:focus-within {
    border-color: var(--accent);
    box-shadow: 0 0 0 2px var(--accent-glow);
}

.search-box svg {
    color: var(--text-secondary);
    flex-shrink: 0;
}

.search-box input {
    background: transparent;
    border: none;
    outline: none;
    color: var(--text-primary);
    font-family: var(--font-body);
    font-size: 0.85rem;
    width: 140px;
}

.search-box input::placeholder {
    color: var(--text-secondary);
}

/* Export Button */
.export-btn {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--card-border);
    color: var(--text-secondary);
    padding: 0.4rem 0.75rem;
    border-radius: 8px;
    font-family: var(--font-body);
    font-size: 0.85rem;
    cursor: pointer;
    transition: all 0.2s;
}

.export-btn:hover {
    background: rgba(255, 255, 255, 0.08);
    color: var(--text-primary);
}

/* Theme Toggle */
.theme-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--card-border);
    color: var(--text-secondary);
    padding: 0.5rem;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.2s;
}

.theme-toggle:hover {
    background: rgba(255, 255, 255, 0.08);
    color: var(--text-primary);
}

.actions {
    display: flex;
    gap: 0.5rem;
}

.filter-btn {
    background: transparent;
    border: 1px solid var(--card-border);
    color: var(--text-secondary);
    padding: 0.4rem 0.8rem;
    border-radius: 8px;
    font-size: 0.8rem;
    cursor: pointer;
    transition: all 0.2s;
}

.filter-btn:hover,
.filter-btn.active {
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-primary);
    border-color: rgba(255, 255, 255, 0.2);
}

/* Unified Table */
.table-container {
    width: 100%;
    max-height: 70vh;
    overflow-y: auto;
    overflow-x: auto;
}

table {
    width: 100%;
    border-collapse: collapse;
    text-align: left;
}

th {
    padding: 1rem 2rem;
    color: var(--text-secondary);
    font-weight: 500;
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    border-bottom: 1px solid var(--card-border);
    background: rgba(2, 6, 23, 0.95);
    backdrop-filter: blur(8px);
    position: sticky;
    top: 0;
    z-index: 10;
}

td {
    padding: 1.25rem 2rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.02);
    font-family: var(--font-heading);
    font-size: 1rem;
    color: var(--text-primary);
    transition: background 0.2s;
}

tr:hover td {
    background: rgba(255, 255, 255, 0.02);
}

/* Cell Types */
.cell-country {
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.cell-price {
    font-feature-settings: "tnum";
    font-variant-numeric: tabular-nums;
}

.trend-up {
    color: #f87171;
}

.trend-down {
    color: #4ade80;
}


/* Loading State */
.loader {
    width: 32px;
    height: 32px;
    border: 3px solid rgba(255, 255, 255, 0.1);
    border-bottom-color: var(--accent);
    border-radius: 50%;
    animation: rotation 1s linear infinite;
    margin: 4rem auto;
}

.hidden {
    display: none;
}

@keyframes rotation {
    0% {
        transform: rotate(0deg);
    }

    100% {
        transform: rotate(360deg);
    }
}

/* Toast */
.status-visible {
    opacity: 1;
    transform: translateY(0);
    background: #10b981;
    /* Green Success */
    color: white;
    padding: 0.75rem 1.5rem;
    border-radius: 100px;
    font-weight: 600;
    box-shadow: 0 10px 25px -5px rgba(16, 185, 129, 0.4);
    z-index: 100;
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    transition: all 0.4s var(--ease-out);
}

.status-hidden {
    opacity: 0;
    transform: translateY(20px);
    pointer-events: none;
    position: fixed;
    bottom: 2rem;
    right: 2rem;
}

/* View Toggle Group */
.view-toggle-group {
    background: rgba(15, 23, 42, 0.6);
    backdrop-filter: blur(12px);
    padding: 0.25rem;
    border-radius: 100px;
    border: 1px solid var(--card-border);
    display: inline-flex;
    gap: 0.25rem;
    margin-left: 1.5rem;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
}

.view-btn {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    padding: 0.5rem 1rem;
    border-radius: 100px;
    cursor: pointer;
    font-family: var(--font-body);
    font-weight: 500;
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    gap: 0.4rem;
    transition: all 0.3s var(--ease-out);
}

.view-btn:hover {
    color: var(--text-primary);
}

.view-btn.active {
    background: var(--accent);
    color: white;
    box-shadow: 0 2px 10px rgba(59, 130, 246, 0.3);
}

.view-btn svg {
    opacity: 0.8;
}

.view-btn.active svg {
    opacity: 1;
}

/* Map Container */
.map-container {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 24px;
    backdrop-filter: blur(20px);
    overflow: hidden;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.3);
    position: relative;
}

#map {
    width: 100%;
    height: 550px;
    border-radius: 24px;
}

/* Map Legend */
.map-legend {
    position: absolute;
    bottom: 1.5rem;
    left: 1.5rem;
    background: rgba(15, 23, 42, 0.9);
    backdrop-filter: blur(12px);
    border: 1px solid var(--card-border);
    border-radius: 12px;
    padding: 1rem;
    font-size: 0.85rem;
    z-index: 10;
}

.map-legend h4 {
    font-family: var(--font-heading);
    font-weight: 500;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.legend-scale {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-top: 0.5rem;
}

.legend-gradient {
    width: 120px;
    height: 12px;
    border-radius: 6px;
}

.legend-labels {
    display: flex;
    justify-content: space-between;
    width: 120px;
    font-size: 0.75rem;
    color: var(--text-secondary);
    margin-top: 0.25rem;
}

/* Mapbox Popup Styling */
.mapboxgl-popup-content {
    background: rgba(15, 23, 42, 0.95) !important;
    backdrop-filter: blur(12px);
    border: 1px solid var(--card-border);
    border-radius: 12px !important;
    padding: 1rem !important;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.4) !important;
    min-width: 180px;
}

.mapboxgl-popup-close-button {
    color: var(--text-secondary) !important;
    font-size: 1.2rem !important;
    right: 8px !important;
    top: 8px !important;
}

.mapboxgl-popup-close-button:hover {
    color: var(--text-primary) !important;
    background: transparent !important;
}

.mapboxgl-popup-tip {
    border-top-color: rgba(15, 23, 42, 0.95) !important;
}

.popup-title {
    font-family: var(--font-heading);
    font-weight: 600;
    font-size: 1rem;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.popup-price {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 700;
    margin: 0.5rem 0;
}

.popup-detail {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

/* Mobile */
@media (max-width: 768px) {
    body {
        padding: 1rem;
    }

    .controls-wrapper {
        flex-direction: column;
        gap: 0.75rem;
    }

    .segmented-control {
        width: 100%;
        justify-content: space-between;
    }

    .segment-btn {
        min-width: auto;
        padding: 0.6rem;
        flex: 1;
        font-size: 0.8rem;
    }

    .segment-btn .icon {
        display: none;
    }

    .view-toggle-group {
        margin-left: 0;
        width: 100%;
        justify-content: center;
    }

    .view-btn {
        flex: 1;
        justify-content: center;
    }

    .stats-bar {
        flex-wrap: wrap;
        gap: 1rem;
        padding: 0.75rem 1rem;
    }

    .stat-item {
        flex: 1;
        min-width: 80px;
    }

    .stat-value {
        font-size: 0.95rem;
    }

    .toolbar {
        flex-direction: column;
        align-items: stretch;
        gap: 0.75rem;
        padding: 1rem;
    }

    .toolbar-left {
        flex-direction: column;
        align-items: stretch;
    }

    .toolbar-right {
        justify-content: space-between;
    }

    .search-box {
        width: 100%;
    }

    .search-box input {
        width: 100%;
    }

    .export-btn span {
        display: none;
    }

    th,
    td {
        padding: 0.75rem 1rem;
        font-size: 0.85rem;
    }
}

/* Site Footer */
.site-footer {
    display: block;
    text-align: center;
    padding: 1rem 0;
    margin: 1rem 0 0 0;
    width: 100vw;
    margin-left: calc(-50vw + 50%);
    font-family: var(--font-body);
    font-size: 0.7rem;
    font-weight: 400;
    color: var(--text-secondary);
    opacity: 0.45;
    transition: opacity 0.3s ease;
}

.site-footer:hover {
    opacity: 0.85;
}

.site-footer .footer-text,
.site-footer .heart {
    display: inline;
}

.site-footer .heart {
    color: #ef4444;
    font-size: 0.75rem;
    margin: 0 0.15rem;
    animation: heartbeat 2s ease-in-out infinite;
}

@keyframes heartbeat {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.1); }
}

.site-footer:hover .heart {
    animation: heartbeat 0.5s ease-in-out infinite;
}

@media (max-width: 768px) {
    .site-footer {
        font-size: 0.6rem;
        padding: 0.75rem 0;
    }

    .site-footer .heart {
        font-size: 0.65rem;
    }
}