/* Professional Dark/Light Mode Theme System using CSS Variables */

/* ================================================
   LIGHT MODE (Default)
   ================================================ */
:root {
    /* Background Colors */
    --bg-primary: #ffffff;
    --bg-secondary: #f7f7f7;
    --bg-tertiary: #fafafa;
    --bg-elevated: #ffffff;

    /* Text Colors */
    --text-primary: #1f2328;
    --text-secondary: #1f2937;
    --text-muted: #6b7280;
    --text-inverse: #ffffff;

    /* Border Colors */
    --border-color: #e5e7eb;
    --border-color-hover: #d1d5db;
    --border-color-focus: #0cc0df;

    /* Brand Colors */
    --brand: #0cc0df;
    --brand-secondary: #ffde59;
    --brand-gradient: linear-gradient(to right, #0cc0df, #ffde59);
    --brand-gradient-135: linear-gradient(135deg, #0cc0df, #ffde59);
    --brand-rgb: 12, 192, 223;

    /* Surface Colors */
    --surface: #f3f4f6;
    --surface-hover: #f9fafb;
    --surface-active: #e5e7eb;

    /* Semantic Colors */
    --success: #10b981;
    --warning: #f59e0b;
    --error: #ef4444;
    --info: #3b82f6;

    /* Overlay */
    --overlay-bg: rgba(0, 0, 0, 0.3);
    --modal-backdrop: rgba(0, 0, 0, 0.6);
    --header-overlay: rgba(255, 255, 255, 0.1);
    --glass-light: rgba(255, 255, 255, 0.6);
    --glass-light-border: rgba(0, 0, 0, 0.06);

    /* Shadows */
    --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.04);
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.06);
    --shadow-md: 0 10px 24px rgba(0, 0, 0, 0.06), 0 2px 6px rgba(0, 0, 0, 0.04);
    --shadow-lg: 0 20px 40px rgba(0, 0, 0, 0.08), 0 2px 6px rgba(0, 0, 0, 0.06);
    --shadow-xl: 0 25px 50px rgba(0, 0, 0, 0.12), 0 4px 10px rgba(0, 0, 0, 0.08);

    /* Focus Ring */
    --ring: 0 0 0 3px rgba(12, 192, 223, 0.2);

    /* Rating/Stars */
    --rating-color: #f59e0b;
    --rating-text: #b4690e;

    /* Skeleton/Loading */
    --skeleton-shimmer: linear-gradient(90deg, rgba(255, 255, 255, 0), rgba(255, 255, 255, .6), rgba(255, 255, 255, 0));

    /* Gradient Overlays */
    --hero-overlay: linear-gradient(90deg, rgba(0, 0, 0, 0.6) 0%, rgba(0, 0, 0, 0.3) 50%, rgba(0, 0, 0, 0) 100%);
    --section-gradient: linear-gradient(180deg, var(--bg-tertiary) 0%, var(--bg-primary) 100%);
    --fade-left: linear-gradient(90deg, var(--bg-tertiary) 0%, transparent 100%);
    --fade-right: linear-gradient(270deg, var(--bg-tertiary) 0%, transparent 100%);

    /* Header */
    --header-bg: #ffffff;
    --header-shadow: 0 1px 0 #eee;

    /* Slider (always light text on images) */
    --slider-text: #ffffff;
    --slider-text-shadow: 0 1px 2px rgba(0, 0, 0, 0.35);
    --slider-arrow-bg: rgba(255, 255, 255, 0.95);
    --slider-arrow-color: #1f2328;
    --slider-arrow-hover-bg: #ffffff;
    --slider-pagination: rgba(255, 255, 255, 0.55);
    --slider-pagination-active: #ffffff;
    --slider-control-bg: rgba(0, 0, 0, 0.7);
    --slider-control-border: rgba(255, 255, 255, 0.4);

    /* Links */
    --link: #0969da;
    --link-hover: #0757b2;

    /* Code/Pre */
    --code-bg: #f6f8fa;
    --code-border: #eaeef2;

    /* Tables */
    --table-row-hover: rgba(2, 122, 190, 0.06);

    /* Selection */
    --selection-bg: rgba(12, 192, 223, 0.2);
    --selection-color: #1f2328;

    /* Tooltips/Popovers */
    --tooltip-bg: rgba(0, 0, 0, 0.85);
    --tooltip-color: #fff;
    --popover-bg: #ffffff;
    --popover-color: #1f2328;
}

/* ================================================
   DARK MODE
   ================================================ */
@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) {
        /* Background Colors */
        --bg-primary: #0d1117;
        --bg-secondary: #161b22;
        --bg-tertiary: #1c2128;
        --bg-elevated: #161b22;

        /* Text Colors */
        --text-primary: #e6edf3;
        --text-secondary: #c9d1d9;
        --text-muted: #8b949e;
        --text-inverse: #ffffff;

        /* Border Colors */
        --border-color: #30363d;
        --border-color-hover: #484f58;
        --border-color-focus: #0cc0df;

        /* Surface Colors */
        --surface: #1c2128;
        --surface-hover: #21262d;
        --surface-active: #2d333b;

        /* Semantic Colors - Adjusted for dark mode */
        --success: #3fb950;
        --warning: #d29922;
        --error: #f85149;
        --info: #58a6ff;

        /* Overlay */
        --overlay-bg: rgba(0, 0, 0, 0.5);
        --modal-backdrop: rgba(0, 0, 0, 0.8);
        --header-overlay: rgba(255, 255, 255, 0.05);
        --glass-light: rgba(255, 255, 255, 0.08);
        --glass-light-border: rgba(255, 255, 255, 0.12);

        /* Shadows - More prominent in dark mode */
        --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.4);
        --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.5);
        --shadow-md: 0 10px 24px rgba(0, 0, 0, 0.4), 0 2px 6px rgba(0, 0, 0, 0.3);
        --shadow-lg: 0 20px 40px rgba(0, 0, 0, 0.5), 0 2px 6px rgba(0, 0, 0, 0.4);
        --shadow-xl: 0 25px 50px rgba(0, 0, 0, 0.6), 0 4px 10px rgba(0, 0, 0, 0.5);

        /* Focus Ring - Brighter for dark mode */
        --ring: 0 0 0 3px rgba(12, 192, 223, 0.4);

        /* Rating/Stars - Adjusted */
        --rating-color: #f59e0b;
        --rating-text: #fbbf24;

        /* Skeleton/Loading - Adjusted for dark mode */
        --skeleton-shimmer: linear-gradient(90deg, rgba(255, 255, 255, 0), rgba(255, 255, 255, .1), rgba(255, 255, 255, 0));

        /* Gradient Overlays - Darker for better contrast */
        --hero-overlay: linear-gradient(90deg, rgba(0, 0, 0, 0.8) 0%, rgba(0, 0, 0, 0.5) 50%, rgba(0, 0, 0, 0.2) 100%);
        --section-gradient: linear-gradient(180deg, var(--bg-tertiary) 0%, var(--bg-primary) 100%);
        --fade-left: linear-gradient(90deg, var(--bg-tertiary) 0%, transparent 100%);
        --fade-right: linear-gradient(270deg, var(--bg-tertiary) 0%, transparent 100%);

        /* Header */
        --header-bg: #0d1117;
        --header-shadow: 0 1px 0 #30363d;

        /* Slider (always light text on images) */
        --slider-text: #ffffff;
        --slider-text-shadow: 0 2px 4px rgba(0, 0, 0, 0.6);
        --slider-arrow-bg: rgba(255, 255, 255, 0.95);
        --slider-arrow-color: #1f2328;
        --slider-arrow-hover-bg: #ffffff;
        --slider-pagination: rgba(255, 255, 255, 0.6);
        --slider-pagination-active: #ffffff;
        --slider-control-bg: rgba(0, 0, 0, 0.8);
        --slider-control-border: rgba(255, 255, 255, 0.5);

        /* Links */
        --link: #58a6ff;
        --link-hover: #4093f5;

        /* Code/Pre */
        --code-bg: #161b22;
        --code-border: #30363d;

        /* Tables */
        --table-row-hover: rgba(88, 166, 255, 0.12);

        /* Selection */
        --selection-bg: rgba(88, 166, 255, 0.35);
        --selection-color: #e6edf3;

        /* Tooltips/Popovers */
        --tooltip-bg: rgba(255, 255, 255, 0.08);
        --tooltip-color: #e6edf3;
        --popover-bg: #161b22;
        --popover-color: #e6edf3;
    }
}

/* Manual Dark Mode Override */
[data-theme="dark"] {
    /* Background Colors */
    --bg-primary: #0d1117;
    --bg-secondary: #161b22;
    --bg-tertiary: #1c2128;
    --bg-elevated: #161b22;

    /* Text Colors */
    --text-primary: #e6edf3;
    --text-secondary: #c9d1d9;
    --text-muted: #8b949e;
    --text-inverse: #ffffff;

    /* Border Colors */
    --border-color: #30363d;
    --border-color-hover: #484f58;
    --border-color-focus: #0cc0df;

    /* Surface Colors */
    --surface: #1c2128;
    --surface-hover: #21262d;
    --surface-active: #2d333b;

    /* Semantic Colors */
    --success: #3fb950;
    --warning: #d29922;
    --error: #f85149;
    --info: #58a6ff;

    /* Overlay */
    --overlay-bg: rgba(0, 0, 0, 0.5);
    --modal-backdrop: rgba(0, 0, 0, 0.8);
    --header-overlay: rgba(255, 255, 255, 0.05);
    --glass-light: rgba(255, 255, 255, 0.08);
    --glass-light-border: rgba(255, 255, 255, 0.12);

    /* Shadows */
    --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.4);
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.5);
    --shadow-md: 0 10px 24px rgba(0, 0, 0, 0.4), 0 2px 6px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 20px 40px rgba(0, 0, 0, 0.5), 0 2px 6px rgba(0, 0, 0, 0.4);
    --shadow-xl: 0 25px 50px rgba(0, 0, 0, 0.6), 0 4px 10px rgba(0, 0, 0, 0.5);

    /* Focus Ring */
    --ring: 0 0 0 3px rgba(12, 192, 223, 0.4);

    /* Rating/Stars */
    --rating-color: #f59e0b;
    --rating-text: #fbbf24;

    /* Skeleton/Loading - Adjusted for dark mode */
    --skeleton-shimmer: linear-gradient(90deg, rgba(255, 255, 255, 0), rgba(255, 255, 255, .1), rgba(255, 255, 255, 0));

    /* Gradient Overlays */
    --hero-overlay: linear-gradient(90deg, rgba(0, 0, 0, 0.8) 0%, rgba(0, 0, 0, 0.5) 50%, rgba(0, 0, 0, 0.2) 100%);
    --section-gradient: linear-gradient(180deg, var(--bg-tertiary) 0%, var(--bg-primary) 100%);
    --fade-left: linear-gradient(90deg, var(--bg-tertiary) 0%, transparent 100%);
    --fade-right: linear-gradient(270deg, var(--bg-tertiary) 0%, transparent 100%);

    /* Header */
    --header-bg: #0d1117;
    --header-shadow: 0 1px 0 #30363d;

    /* Slider (always light text on images) */
    --slider-text: #ffffff;
    --slider-text-shadow: 0 2px 4px rgba(0, 0, 0, 0.6);
    --slider-arrow-bg: rgba(255, 255, 255, 0.95);
    --slider-arrow-color: #1f2328;
    --slider-arrow-hover-bg: #ffffff;
    --slider-pagination: rgba(255, 255, 255, 0.6);
    --slider-pagination-active: #ffffff;
    --slider-control-bg: rgba(0, 0, 0, 0.8);
    --slider-control-border: rgba(255, 255, 255, 0.5);

    /* Links */
    --link: #58a6ff;
    --link-hover: #4093f5;

    /* Code/Pre */
    --code-bg: #161b22;
    --code-border: #30363d;

    /* Tables */
    --table-row-hover: rgba(88, 166, 255, 0.12);

    /* Selection */
    --selection-bg: rgba(88, 166, 255, 0.35);
    --selection-color: #e6edf3;

    /* Tooltips/Popovers */
    --tooltip-bg: rgba(255, 255, 255, 0.08);
    --tooltip-color: #e6edf3;
    --popover-bg: #161b22;
    --popover-color: #e6edf3;
}

/* Manual Light Mode Override */
[data-theme="light"] {
    /* Background Colors */
    --bg-primary: #ffffff;
    --bg-secondary: #f7f7f7;
    --bg-tertiary: #fafafa;
    --bg-elevated: #ffffff;

    /* Text Colors */
    --text-primary: #1f2328;
    --text-secondary: #1f2937;
    --text-muted: #6b7280;
    --text-inverse: #ffffff;

    /* Border Colors */
    --border-color: #e5e7eb;
    --border-color-hover: #d1d5db;
    --border-color-focus: #0cc0df;

    /* Surface Colors */
    --surface: #f3f4f6;
    --surface-hover: #f9fafb;
    --surface-active: #e5e7eb;

    /* Semantic Colors */
    --success: #10b981;
    --warning: #f59e0b;
    --error: #ef4444;
    --info: #3b82f6;

    /* Overlay */
    --overlay-bg: rgba(0, 0, 0, 0.3);
    --modal-backdrop: rgba(0, 0, 0, 0.6);
    --header-overlay: rgba(255, 255, 255, 0.1);

    /* Shadows */
    --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.04);
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.06);
    --shadow-md: 0 10px 24px rgba(0, 0, 0, 0.06), 0 2px 6px rgba(0, 0, 0, 0.04);
    --shadow-lg: 0 20px 40px rgba(0, 0, 0, 0.08), 0 2px 6px rgba(0, 0, 0, 0.06);
    --shadow-xl: 0 25px 50px rgba(0, 0, 0, 0.12), 0 4px 10px rgba(0, 0, 0, 0.08);

    /* Focus Ring */
    --ring: 0 0 0 3px rgba(12, 192, 223, 0.2);

    /* Rating/Stars */
    --rating-color: #f59e0b;
    --rating-text: #b4690e;

    /* Skeleton/Loading */
    --skeleton-shimmer: linear-gradient(90deg, rgba(255, 255, 255, 0), rgba(255, 255, 255, .6), rgba(255, 255, 255, 0));

    /* Gradient Overlays */
    --hero-overlay: linear-gradient(90deg, rgba(0, 0, 0, 0.6) 0%, rgba(0, 0, 0, 0.3) 50%, rgba(0, 0, 0, 0) 100%);
    --section-gradient: linear-gradient(180deg, var(--bg-tertiary) 0%, var(--bg-primary) 100%);
    --fade-left: linear-gradient(90deg, var(--bg-tertiary) 0%, transparent 100%);
    --fade-right: linear-gradient(270deg, var(--bg-tertiary) 0%, transparent 100%);

    /* Header */
    --header-bg: #ffffff;
    --header-shadow: 0 1px 0 #eee;

    /* Slider (always light text on images) */
    --slider-text: #ffffff;
    --slider-text-shadow: 0 1px 2px rgba(0, 0, 0, 0.35);
    --slider-arrow-bg: rgba(255, 255, 255, 0.95);
    --slider-arrow-color: #1f2328;
    --slider-arrow-hover-bg: #ffffff;
    --slider-pagination: rgba(255, 255, 255, 0.55);
    --slider-pagination-active: #ffffff;
    --slider-control-bg: rgba(0, 0, 0, 0.7);
    --slider-control-border: rgba(255, 255, 255, 0.4);
}

/* ================================================
   SMOOTH TRANSITIONS
   ================================================ */
html {
    transition: background-color 0.3s ease, color 0.3s ease;
}

body {
    background-color: var(--bg-primary);
    color: var(--text-primary);
    transition: background-color 0.3s ease, color 0.3s ease;
}

/* Improve default form controls across themes */
input,
select,
textarea {
    background: var(--bg-primary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

input:hover,
select:hover,
textarea:hover {
    border-color: var(--border-color-hover);
}

input:not([type="radio"]):focus,
select:focus,
textarea:focus {
    outline: none;
    box-shadow: var(--ring);
    border-color: var(--border-color-focus);
}


/* Apply smooth transitions to common elements */
* {
    transition-property: background-color, border-color, color, fill, stroke;
    transition-duration: 0.2s;
    transition-timing-function: ease;
}

/* Disable transitions for elements that need instant feedback */
button:active,
a:active,
input:focus,
textarea:focus,
select:focus {
    transition-duration: 0s;
}

/* Respect user's motion preferences */
@media (prefers-reduced-motion: reduce) {

    *,
    html,
    body {
        transition-duration: 0s !important;
        animation-duration: 0s !important;
    }
}

/* ================================================
   ADDITIONAL DARK MODE FIXES
   ================================================ */

/* Ensure proper contrast for inputs and form elements */
input::placeholder,
textarea::placeholder {
    color: var(--text-muted);
    opacity: 0.8;
}

/* Ensure SVG icons inherit proper colors */
svg {
    color: inherit;
}

/* Fix scrollbar colors for dark mode */
@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) {
        color-scheme: dark;
    }
}

[data-theme="dark"] {
    color-scheme: dark;
}

/* Text selection colors */
::selection {
    background: var(--selection-bg);
    color: var(--selection-color);
}

/* Code and preformatted blocks */
pre,
code,
kbd,
samp {
    background: var(--code-bg);
    color: var(--text-primary);
    border: 1px solid var(--code-border);
    border-radius: 8px;
}

pre {
    padding: 12px 14px;
    overflow: auto;
}

code,
kbd,
samp {
    padding: 2px 6px;
}

/* Table hover utility */
table tr:hover {
    background: var(--table-row-hover);
}

/* ================================================
   UTILITY CLASSES
   ================================================ */
.glass {
    background: var(--glass-light);
    border: 1px solid var(--glass-light-border);
    -webkit-backdrop-filter: blur(16px);
    backdrop-filter: blur(16px);
}

.on-image,
.inverse {
    color: var(--text-inverse);
    text-shadow: 0 2px 6px rgba(0, 0, 0, 0.5);
}

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

.popover {
    background: var(--popover-bg);
    color: var(--popover-color);
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--border-color);
}

.theme-toggle-btn {
    width: 38px;
    height: 38px;
    border-radius: 999px;
    border: 1px solid var(--border-color);
    background: var(--bg-primary);
    color: var(--text-primary);
    display: grid;
    place-items: center;
    cursor: pointer;
    transition: all 0.2s ease;
}

.theme-toggle-btn:hover {
    background: var(--surface-hover);
    border-color: var(--border-color-hover);
    transform: rotate(15deg);
}

.theme-toggle-btn:active {
    transform: scale(0.95);
}

/* Icon visibility based on theme */
[data-theme="light"] .theme-toggle-btn .moon-icon,
:root:not([data-theme="dark"]) .theme-toggle-btn .moon-icon {
    display: block;
}

[data-theme="light"] .theme-toggle-btn .sun-icon,
:root:not([data-theme="dark"]) .theme-toggle-btn .sun-icon {
    display: none;
}

[data-theme="dark"] .theme-toggle-btn .moon-icon {
    display: none;
}

[data-theme="dark"] .theme-toggle-btn .sun-icon {
    display: block;
}

@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) .theme-toggle-btn .moon-icon {
        display: none;
    }

    :root:not([data-theme="light"]) .theme-toggle-btn .sun-icon {
        display: block;
    }
}