/* FuelMate Dark Mode Theme System */

/* Default theme variables (light) - Applied to root without data-theme */
:root {
    /* Primary colors */
    --primary: #FFB700;
    --primary-light: #FFD54F;
    --primary-dark: #F59E0B;
    --primary-subtle: #FFF7E6;
    --accent: #FF6B35;

    /* Backgrounds */
    --background: #FFFFFF;
    --surface: #FAFAF8;
    --surface-elevated: #FFFEF9;
    --surface-card: #FFFFFF;
    --surface-hover: #F8F5EE;

    /* Borders */
    --border: #F0EDE6;
    --border-light: #F8F5EE;
    --border-dark: #E0DDD6;

    /* Text colors */
    --text-primary: #1F1F1F;
    --text-secondary: #6B6B6B;
    --text-tertiary: #A0A0A0;
    --text-on-primary: #FFFFFF;
    --text-inverse: #FFFFFF;

    /* Shadows */
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.04);
    --shadow-md: 0 2px 8px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 4px 16px rgba(0, 0, 0, 0.08);
    --shadow-xl: 0 8px 24px rgba(0, 0, 0, 0.12);

    /* Functional colors */
    --success: #10B981;
    --error: #EF4444;
    --warning: #F59E0B;
    --info: #3B82F6;

    /* Overlays */
    --overlay: rgba(0, 0, 0, 0.6);
    --overlay-light: rgba(0, 0, 0, 0.3);

    /* Chart colors */
    --chart-line: #FFB700;
    --chart-grid: rgba(0, 0, 0, 0.05);
    --chart-text: #666666;

    /* Inputs */
    --input-bg: #FFFFFF;
    --input-border: #E5E7EB;
    --input-focus: #FFB700;
    --input-placeholder: #A0A0A0;

    /* Modal */
    --modal-bg: #FFFFFF;
    --modal-header: linear-gradient(135deg, #FFB700 0%, #FFC933 100%);

    /* Station cards */
    --station-bg: #FFFFFF;
    --station-hover: #FFFEF9;
    --price-bg: #FFF7E6;
    --price-color: #F59E0B;

    /* Loading */
    --skeleton-base: #F0F0F0;
    --skeleton-shine: #FAFAFA;
}

/* Light Theme (Explicit) */
:root[data-theme="light"] {
    /* Primary colors */
    --primary: #FFB700;
    --primary-light: #FFD54F;
    --primary-dark: #F59E0B;
    --primary-subtle: #FFF7E6;
    --accent: #FF6B35;

    /* Backgrounds */
    --background: #FFFFFF;
    --surface: #FAFAF8;
    --surface-elevated: #FFFEF9;
    --surface-card: #FFFFFF;
    --surface-hover: #F8F5EE;

    /* Borders */
    --border: #F0EDE6;
    --border-light: #F8F5EE;
    --border-dark: #E0DDD6;

    /* Text colors */
    --text-primary: #1F1F1F;
    --text-secondary: #6B6B6B;
    --text-tertiary: #A0A0A0;
    --text-on-primary: #FFFFFF;
    --text-inverse: #FFFFFF;

    /* Shadows */
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.04);
    --shadow-md: 0 2px 8px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 4px 16px rgba(0, 0, 0, 0.08);
    --shadow-xl: 0 8px 24px rgba(0, 0, 0, 0.12);

    /* Functional colors */
    --success: #10B981;
    --error: #EF4444;
    --warning: #F59E0B;
    --info: #3B82F6;

    /* Overlays */
    --overlay: rgba(0, 0, 0, 0.6);
    --overlay-light: rgba(0, 0, 0, 0.3);

    /* Chart colors */
    --chart-line: #FFB700;
    --chart-grid: rgba(0, 0, 0, 0.05);
    --chart-text: #666666;

    /* Inputs */
    --input-bg: #FFFFFF;
    --input-border: #E5E7EB;
    --input-focus: #FFB700;
    --input-placeholder: #A0A0A0;

    /* Modal */
    --modal-bg: #FFFFFF;
    --modal-header: linear-gradient(135deg, #FFB700 0%, #FFC933 100%);

    /* Station cards */
    --station-bg: #FFFFFF;
    --station-hover: #FFFEF9;
    --price-bg: #FFF7E6;
    --price-color: #F59E0B;

    /* Loading */
    --skeleton-base: #F0F0F0;
    --skeleton-shine: #FAFAFA;
}

/* Dark Theme */
:root[data-theme="dark"] {
    /* Primary colors - slightly adjusted for dark mode */
    --primary: #FFB700;
    --primary-light: #FFCD4F;
    --primary-dark: #E59100;
    --primary-subtle: #332600;
    --accent: #FF7A47;

    /* Backgrounds */
    --background: #0F0F0F;
    --surface: #1A1A1A;
    --surface-elevated: #222222;
    --surface-card: #1E1E1E;
    --surface-hover: #2A2A2A;

    /* Borders */
    --border: #2A2A2A;
    --border-light: #222222;
    --border-dark: #333333;

    /* Text colors */
    --text-primary: #F0F0F0;
    --text-secondary: #B0B0B0;
    --text-tertiary: #808080;
    --text-on-primary: #000000;
    --text-inverse: #0F0F0F;

    /* Shadows - more subtle in dark mode */
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.2);
    --shadow-md: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 4px 16px rgba(0, 0, 0, 0.4);
    --shadow-xl: 0 8px 24px rgba(0, 0, 0, 0.5);

    /* Functional colors - adjusted for dark mode */
    --success: #34D399;
    --error: #F87171;
    --warning: #FBBF24;
    --info: #60A5FA;

    /* Overlays */
    --overlay: rgba(0, 0, 0, 0.8);
    --overlay-light: rgba(0, 0, 0, 0.5);

    /* Chart colors */
    --chart-line: #FFB700;
    --chart-grid: rgba(255, 255, 255, 0.05);
    --chart-text: #B0B0B0;

    /* Inputs */
    --input-bg: #1E1E1E;
    --input-border: #333333;
    --input-focus: #FFB700;
    --input-placeholder: #606060;

    /* Modal */
    --modal-bg: #1A1A1A;
    --modal-header: linear-gradient(135deg, #FFB700 0%, #E59100 100%);

    /* Station cards */
    --station-bg: #1E1E1E;
    --station-hover: #262626;
    --price-bg: #332600;
    --price-color: #FFB700;

    /* Loading */
    --skeleton-base: #2A2A2A;
    --skeleton-shine: #333333;
}

/* System preference - automatically follow OS setting */
@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]):not([data-theme="dark"]) {
        /* Copy all dark theme variables here for system preference */
        --primary: #FFB700;
        --primary-light: #FFCD4F;
        --primary-dark: #E59100;
        --primary-subtle: #332600;
        --accent: #FF7A47;
        --background: #0F0F0F;
        --surface: #1A1A1A;
        --surface-elevated: #222222;
        --surface-card: #1E1E1E;
        --surface-hover: #2A2A2A;
        --border: #2A2A2A;
        --border-light: #222222;
        --border-dark: #333333;
        --text-primary: #F0F0F0;
        --text-secondary: #B0B0B0;
        --text-tertiary: #808080;
        --text-on-primary: #000000;
        --text-inverse: #0F0F0F;
        --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.2);
        --shadow-md: 0 2px 8px rgba(0, 0, 0, 0.3);
        --shadow-lg: 0 4px 16px rgba(0, 0, 0, 0.4);
        --shadow-xl: 0 8px 24px rgba(0, 0, 0, 0.5);
        --success: #34D399;
        --error: #F87171;
        --warning: #FBBF24;
        --info: #60A5FA;
        --overlay: rgba(0, 0, 0, 0.8);
        --overlay-light: rgba(0, 0, 0, 0.5);
        --chart-line: #FFB700;
        --chart-grid: rgba(255, 255, 255, 0.05);
        --chart-text: #B0B0B0;
        --input-bg: #1E1E1E;
        --input-border: #333333;
        --input-focus: #FFB700;
        --input-placeholder: #606060;
        --modal-bg: #1A1A1A;
        --modal-header: linear-gradient(135deg, #FFB700 0%, #E59100 100%);
        --station-bg: #1E1E1E;
        --station-hover: #262626;
        --price-bg: #332600;
        --price-color: #FFB700;
        --skeleton-base: #2A2A2A;
        --skeleton-shine: #333333;
    }
}

/* Smooth transitions for theme changes */
* {
    transition: background-color 0.3s ease,
                color 0.3s ease,
                border-color 0.3s ease,
                box-shadow 0.3s ease;
}

/* Prevent transition on page load */
body.no-transitions * {
    transition: none !important;
}

/* Update body background */
body {
    background: var(--background);
    color: var(--text-primary);
}

/* Update all surface elements */
.header,
.search-container,
.station,
.modal-content,
.card,
.surface {
    background: var(--surface-card);
    color: var(--text-primary);
}

/* Update borders */
.station,
.search-input,
.modal-content,
.card {
    border-color: var(--border);
}

/* Update text colors */
h1, h2, h3, h4, h5, h6 {
    color: var(--text-primary);
}

.subtitle,
.tagline,
.description,
.station-address {
    color: var(--text-secondary);
}

/* Update input fields */
input,
select,
textarea {
    background: var(--input-bg);
    color: var(--text-primary);
    border-color: var(--input-border);
}

input::placeholder,
textarea::placeholder {
    color: var(--input-placeholder);
}

/* Update buttons */
button {
    transition: all 0.3s ease;
}

/* Update price display */
.price {
    background: var(--price-bg);
}

.price-value {
    color: var(--price-color);
}

/* Station hover effects */
.station:hover {
    background: var(--station-hover);
}

/* Loading skeleton for dark mode */
.skeleton {
    background: var(--skeleton-base);
    background-image: linear-gradient(
        90deg,
        var(--skeleton-base) 0%,
        var(--skeleton-shine) 50%,
        var(--skeleton-base) 100%
    );
}

/* Scrollbar styling for dark mode */
:root[data-theme="dark"] ::-webkit-scrollbar {
    background: var(--surface);
}

:root[data-theme="dark"] ::-webkit-scrollbar-track {
    background: var(--surface);
}

:root[data-theme="dark"] ::-webkit-scrollbar-thumb {
    background: var(--border-dark);
    border-radius: 4px;
}

:root[data-theme="dark"] ::-webkit-scrollbar-thumb:hover {
    background: var(--text-tertiary);
}

/* Chart.js dark mode adjustments */
:root[data-theme="dark"] .chart-container {
    background: var(--surface-card);
    border-color: var(--border);
}

/* Modal overlays */
.modal,
.price-modal {
    background: var(--overlay);
}

/* Special handling for gradients */
:root[data-theme="dark"] .hero-gradient {
    background: linear-gradient(180deg, var(--surface-elevated) 0%, var(--background) 100%);
}

/* Logo adjustments for dark mode */
:root[data-theme="dark"] .logo-dark-mode {
    filter: brightness(1.2);
}

/* Ensure primary button stays visible */
.btn-primary,
.search-button {
    background: var(--primary);
    color: var(--text-on-primary);
}

.btn-primary:hover,
.search-button:hover {
    background: var(--primary-dark);
}

/* Price history modal adjustments */
:root[data-theme="dark"] .price-modal-content {
    background: var(--modal-bg);
}

:root[data-theme="dark"] .stat-card {
    background: var(--surface-elevated);
}

:root[data-theme="dark"] .insight-card {
    background: var(--surface-elevated);
}

:root[data-theme="dark"] .day-card {
    background: var(--surface-elevated);
}

:root[data-theme="dark"] .comparison-card {
    background: var(--surface-elevated);
}

/* Blog info-box dark mode */
:root[data-theme="dark"] .info-box {
    background: linear-gradient(135deg, #1a2e1a 0%, #1f3520 100%);
    border-color: #22c55e;
}

:root[data-theme="dark"] .info-box h4 {
    color: #86efac;
}

:root[data-theme="dark"] .info-box p {
    color: #d1fae5;
}

:root[data-theme="dark"] .info-box a {
    color: #fbbf24;
}

:root[data-theme="dark"] .info-box.warning {
    background: linear-gradient(135deg, #2d2814 0%, #3d351a 100%);
    border-color: #eab308;
}

:root[data-theme="dark"] .info-box.warning h4 {
    color: #fef08a;
}

:root[data-theme="dark"] .info-box.warning p {
    color: #fef9c3;
}

/* Blog stats grid dark mode */
:root[data-theme="dark"] .article-body .stat-card {
    background: var(--surface-elevated);
    border-color: var(--border);
}

:root[data-theme="dark"] .article-body .stat-card .stat-label {
    color: var(--text-secondary);
}

/* Blog data tables dark mode */
:root[data-theme="dark"] .article-body table thead,
:root[data-theme="dark"] .article-body .data-table thead {
    background: linear-gradient(135deg, #166534 0%, #14532d 100%);
}

:root[data-theme="dark"] .article-body table,
:root[data-theme="dark"] .article-body .data-table {
    background: var(--surface-card);
    border-color: var(--border);
}

:root[data-theme="dark"] .article-body table td,
:root[data-theme="dark"] .article-body .data-table td {
    border-color: var(--border);
    color: var(--text-secondary);
}

:root[data-theme="dark"] .article-body table tbody tr:nth-child(even),
:root[data-theme="dark"] .article-body .data-table tbody tr:nth-child(even) {
    background: var(--surface);
}

:root[data-theme="dark"] .article-body table tbody tr:hover,
:root[data-theme="dark"] .article-body .data-table tbody tr:hover {
    background: var(--surface-hover);
}

/* System preference dark mode for blog elements */
@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]):not([data-theme="dark"]) .info-box {
        background: linear-gradient(135deg, #1a2e1a 0%, #1f3520 100%);
        border-color: #22c55e;
    }

    :root:not([data-theme="light"]):not([data-theme="dark"]) .info-box h4 {
        color: #86efac;
    }

    :root:not([data-theme="light"]):not([data-theme="dark"]) .info-box p {
        color: #d1fae5;
    }

    :root:not([data-theme="light"]):not([data-theme="dark"]) .info-box a {
        color: #fbbf24;
    }

    :root:not([data-theme="light"]):not([data-theme="dark"]) .article-body .stat-card {
        background: var(--surface-elevated);
    }

    :root:not([data-theme="light"]):not([data-theme="dark"]) .article-body table thead,
    :root:not([data-theme="light"]):not([data-theme="dark"]) .article-body .data-table thead {
        background: linear-gradient(135deg, #166534 0%, #14532d 100%);
    }
}