/* Base CSS - Theme-Agnostic Variables, Reset, and Global Styles */
/*
   NOTE: Theme-specific variables (colors, sizing) are now in:
   - assets/css/theme-jazzy.css (vibrant theme)
   - assets/css/theme-calm.css (minimal theme)

   This file contains only shared/utility variables that work across all themes.
*/

/* Root CSS Variables - Theme-Agnostic */
:root {
    /* Layout */
    --header-height: 127px;  /* Fixed header height (122px for 2-row layout) + 5px margin */

    /* Utility Colors (not theme-specific) */
    --success-color: #10b981;
    --danger-color: #ef4444;
    --warning-color: #f59e0b;
    --info-color: #3b82f6;

    /* Transitions & Animations */
    --transition: all 0.3s ease;
    --transition-fast: all 0.15s ease;
    --transition-slow: all 0.5s ease;

    /* Spacing (utility classes) */
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;
    --spacing-3xl: 5rem;

    /* Typography Utilities (in addition to theme-specific) */
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.875rem;
    --font-size-4xl: 2.25rem;
    --font-size-5xl: 3rem;
}

/* Dark Mode Variables - Works with Both Jazzy & Calm Themes */
/* Dark mode adjusts colors while preserving the chosen theme style */
[data-theme="dark"] {
    /* Override theme colors for dark mode */
    --text-color: #e5e7eb;
    --secondary-text-color: #9ca3af;
    --light-bg: #1f2937;
    --white: #111827;
    --border-color: #374151;
    --section-bg: #111827;

    /* Utility Colors (adjusted for dark) */
    --success-color: #34d399;
    --danger-color: #f87171;
    --warning-color: #fbbf24;
    --info-color: #60a5fa;
}

/* Dark mode with Jazzy theme */
[data-theme="dark"][data-theme-style="jazzy"] {
    --primary-color: #3b82f6;
    --secondary-color: #60a5fa;
    --card-bg: #1f2937;
    --hero-gradient: linear-gradient(135deg, #4c1d95 0%, #5b21b6 100%);
}

/* Dark mode with Calm theme */
[data-theme="dark"][data-theme-style="calm"] {
    --primary-color: #e5e7eb;
    --secondary-color: #9ca3af;
    --card-bg: #1f2937;
    --border-color: #374151;
}

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

/* Global Body Styles */
body {
    font-family: var(--font-family, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif);
    font-size: var(--body-text-size, 1rem);
    letter-spacing: var(--letter-spacing, normal);
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--section-bg, var(--white, #ffffff));
    min-height: 100vh;
    overflow-x: hidden;
    transition: background-color 0.3s ease, color 0.3s ease;
    padding-top: var(--header-height);  /* Account for fixed header */
}

/* Main container for section ordering */
main {
    display: flex;
    flex-direction: column;
}

/* Base Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.2;
    color: var(--text-color);
}

p {
    margin-bottom: var(--spacing-md);
}

a {
    color: var(--primary-color);
    text-decoration: none;
    transition: var(--transition);
}

a:hover {
    color: var(--secondary-color);
}

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* Section Spacing */
section {
    padding: var(--spacing-xl) var(--spacing-md);
    scroll-margin-top: var(--header-height);
}

/* Search Result Highlight Animation */
@keyframes searchHighlight {
    0%, 100% {
        background-color: transparent;
        box-shadow: none;
    }
    50% {
        background-color: rgba(37, 99, 235, 0.1);
        box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.2);
    }
}

.search-highlight-target {
    animation: searchHighlight 2s ease-in-out 2;
    border: 2px solid var(--primary-color);
    border-radius: 8px;
    scroll-margin-top: calc(var(--header-height) + 2rem);
}

/* Screen Reader Only - Accessibility */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}