/* Theme Variables */
:root {
    /* Light Theme (Default) - Enhanced for better harmony and visual appeal */
    /* Background colors with subtle gradients */
    --bg-primary: #f8fafc;
    --bg-secondary: #f1f5f9;
    --bg-tertiary: #e2e8f0;
    /* Text colors with better contrast */
    --text-primary: #1e293b;
    --text-secondary: #475569;
    /* Vibrant accent colors */
    --accent-primary: #3b82f6;
    --accent-secondary: #2563eb;
    --border-color: #e2e8f0;
    /* Card styling with subtle shadows */
    --card-bg: linear-gradient(145deg, #ffffff, #f8fafc);
    --card-shadow: 0 4px 10px rgba(0, 0, 0, 0.05), 0 2px 4px rgba(0, 0, 0, 0.03);
    /* Status colors */
    --error-bg: #fee2e2;
    --error-text: #b91c1c;
    --success-bg: #dcfce7;
    --success-text: #166534;
    /* Code blocks */
    --code-bg: #f1f5f9;
    --code-text: #1e293b;
    /* Header with subtle transparency */
    --header-bg: rgba(248, 250, 252, 0.95);
    /* Buttons with gradients */
    --button-bg: linear-gradient(135deg, #3b82f6, #2563eb);
    --button-text: #ffffff;
    --button-hover: linear-gradient(135deg, #2563eb, #1d4ed8);
    /* Form elements */
    --input-bg: #ffffff;
    --input-border-focus: rgba(59, 130, 246, 0.4);
    /* Primary theme color */
    --primary-color: #3b82f6;
    --primary-color-rgb: 59, 130, 246;
    /* Scrollbar styling */
    --scrollbar-track: #f1f5f9;
    --scrollbar-thumb: #cbd5e0;
    --scrollbar-thumb-hover: #94a3b8;
    /* Selection styling */
    --selection-bg: rgba(59, 130, 246, 0.2);
    --selection-text: #1e293b;
}

/* Dark Theme - Enhanced for better readability, reduced eye strain, and visual appeal */
[data-theme="dark"] {
    /* Darker background with better contrast */
    --bg-primary: #0f1117;
    --bg-secondary: #161b22;
    --bg-tertiary: #21262d;
    /* Brighter text for better readability */
    --text-primary: #ffffff;
    --text-secondary: #d1d5db;
    /* More vibrant accent colors */
    --accent-primary: #60a5fa;
    --accent-secondary: #3b82f6;
    --border-color: #30363d;
    /* Subtle gradient for depth */
    --card-bg: linear-gradient(145deg, #161b22, #0f1117);
    --card-shadow: 0 4px 12px rgba(0, 0, 0, 0.5), 0 1px 3px rgba(0, 0, 0, 0.3);
    /* Error and success states with better contrast */
    --error-bg: #3c1a1e;
    --error-text: #fca5a5;
    --success-bg: #1c4532;
    --success-text: #86efac;
    /* Code blocks with better readability */
    --code-bg: #21262d;
    --code-text: #ffffff;
    /* Header with slight transparency */
    --header-bg: rgba(15, 17, 23, 0.95);
    /* Buttons with vibrant gradients */
    --button-bg: linear-gradient(135deg, #60a5fa, #3b82f6);
    --button-text: #ffffff;
    --button-hover: linear-gradient(135deg, #3b82f6, #2563eb);
    /* Form elements */
    --input-bg: #21262d;
    --input-border-focus: rgba(96, 165, 250, 0.4);
    /* Primary theme color */
    --primary-color: #60a5fa;
    --primary-color-rgb: 96, 165, 250;
    /* Scrollbar styling */
    --scrollbar-track: #161b22;
    --scrollbar-thumb: #30363d;
    --scrollbar-thumb-hover: #4a5568;
    /* Selection styling */
    --selection-bg: rgba(96, 165, 250, 0.3);
    --selection-text: #ffffff;
}

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

/* Selection styling */
::selection {
    background-color: var(--selection-bg);
    color: var(--selection-text);
}

/* Scrollbar styling */
::-webkit-scrollbar {
    width: 10px;
    height: 10px;
}

::-webkit-scrollbar-track {
    background: var(--scrollbar-track);
}

::-webkit-scrollbar-thumb {
    background: var(--scrollbar-thumb);
    border-radius: 5px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--scrollbar-thumb-hover);
}

header {
    background-color: var(--header-bg);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
    transition: background-color 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}

[data-theme="dark"] header {
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
}

.logo a {
    color: var(--accent-primary);
}

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

nav a:hover, nav a.active {
    color: var(--accent-primary);
}

.theme-toggle button {
    color: var(--text-primary);
}

.theme-toggle .light-icon {
    display: none;
}

.theme-toggle .dark-icon {
    display: block;
}

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

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

.tool-card {
    background: var(--card-bg);
    box-shadow: var(--card-shadow);
    border: 1px solid var(--border-color);
    transition: transform 0.3s ease, box-shadow 0.3s ease, background 0.3s ease, border-color 0.3s ease;
}

.tool-card:hover {
    box-shadow: 0 12px 20px rgba(0, 0, 0, 0.1), 0 4px 8px rgba(0, 0, 0, 0.05);
}

[data-theme="dark"] .tool-card:hover {
    box-shadow: 0 12px 20px rgba(0, 0, 0, 0.4), 0 4px 8px rgba(0, 0, 0, 0.2);
}

.tool-card h3 {
    color: var(--accent-primary);
}

footer {
    border-top: 1px solid var(--border-color);
    background-color: var(--bg-secondary);
    transition: background-color 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}

[data-theme="dark"] footer {
    background: linear-gradient(180deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
    box-shadow: 0 -4px 6px rgba(0, 0, 0, 0.1);
}

footer a, .credits a {
    color: var(--accent-primary);
    transition: color 0.3s ease, text-decoration 0.3s ease;
}

footer a:hover, .credits a:hover {
    color: var(--accent-secondary);
}

.credits a {
    font-weight: 600;
    position: relative;
    text-decoration: none;
}

.credits a::after {
    content: '';
    position: absolute;
    width: 100%;
    height: 1px;
    bottom: 0;
    left: 0;
    background-color: var(--accent-primary);
    transform: scaleX(0);
    transform-origin: bottom right;
    transition: transform 0.3s ease;
}

.credits a:hover::after {
    transform: scaleX(1);
    transform-origin: bottom left;
}

[data-theme="dark"] .credits a {
    color: var(--accent-primary);
}

[data-theme="dark"] .credits a::after {
    background-color: var(--accent-secondary);
}

textarea, input[type="text"], select {
    background-color: var(--input-bg);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

textarea:focus, input[type="text"]:focus, select:focus {
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px var(--input-border-focus);
    outline: none;
}

button.primary {
    background: var(--button-bg);
    color: var(--button-text);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    transition: background 0.3s ease, transform 0.2s ease, box-shadow 0.3s ease;
}

button.primary:hover {
    background: var(--button-hover);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.15);
    transform: translateY(-1px);
}

[data-theme="dark"] button.primary {
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}

[data-theme="dark"] button.primary:hover {
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.4);
}

button.secondary {
    background-color: var(--bg-tertiary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

button.secondary:hover {
    background-color: var(--bg-secondary);
}

.error-message {
    background-color: var(--error-bg);
    color: var(--error-text);
    border: 1px solid var(--error-text);
}

.success-message {
    background-color: var(--success-bg);
    color: var(--success-text);
    border: 1px solid var(--success-text);
}

pre, code {
    background-color: var(--code-bg);
    color: var(--code-text);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: var(--spacing-xs);
    font-family: var(--font-mono);
    transition: background-color 0.3s ease, color 0.3s ease, border-color 0.3s ease;
}

.hero p {
    font-size: 1.2rem;
    max-width: 600px;
    margin: 0 auto;
}

[data-theme="dark"] .hero p {
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.3);
}

.hero h1 {
    font-size: 3rem;
    margin-bottom: var(--spacing-md);
    background: linear-gradient(to right, var(--accent-primary), var(--accent-secondary));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    display: inline-block;
    font-weight: 700;
}

[data-theme="dark"] .hero h1 {
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.5);
    background: linear-gradient(to right, var(--accent-primary), var(--text-primary));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    display: inline-block;
    font-weight: 700;
}

.credits {
    margin-top: var(--spacing-md);
    font-size: 0.9rem;
}

.credits p {
    font-size: 0.9rem;
    opacity: 0.9;
}

[data-theme="dark"] .credits p {
    opacity: 1;
}