/* Base styles */
:root {
    --bg-color: #f4f4f9;
    --text-color: #333;
    --card-bg-color: #fff;
    --header-bg-color: #0078d7;
    --header-text-color: #fff;
    --section-title-color: #0078d7;
    --card-hover-shadow: 0 8px 15px rgba(0, 0, 0, 0.2);
    --card-icon-size: 3rem;
    --transition-speed: 0.3s;
    --border-radius: 10px;
    --search-border: #ddd;
    --search-focus-border: #0078d7;
    --card-border: rgba(0, 120, 215, 0.2);
}

[data-theme="dark"] {
    --bg-color: #1e1e1e;
    --text-color: #f5f5f5;
    --card-bg-color: #2c2c2c;
    --header-bg-color: #232323;
    --header-text-color: #f5f5f5;
    --section-title-color: #79a9ff;
    --card-hover-shadow: 0 8px 15px rgba(0, 0, 0, 0.5);
    --card-border: rgba(121, 169, 255, 0.3);
    --search-border: #444;
    --search-focus-border: #79a9ff;
}

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

body {
    font-family: 'Segoe UI', Arial, sans-serif;
    margin: 0;
    padding: 0;
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
    transition: background-color var(--transition-speed), color var(--transition-speed);
}

/* Header styles */
header {
    background-color: var(--header-bg-color);
    color: var(--header-text-color);
    padding: 2rem 1rem;
    text-align: center;
    position: relative;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
    transition: background-color var(--transition-speed), color var(--transition-speed);
}

header h1 {
    margin: 0;
    font-size: 2.5rem;
    font-weight: 600;
}

header p {
    margin-top: 0.5rem;
    font-size: 1.2rem;
    opacity: 0.9;
}

/* Darkmode toggle */
.darkmode-toggle {
    position: absolute;
    top: 20px;
    right: 20px;
    display: flex;
    align-items: center;
    cursor: pointer;
}

.darkmode-toggle input {
    appearance: none;
    width: 50px;
    height: 25px;
    background: var(--card-bg-color);
    border: 2px solid var(--text-color);
    border-radius: 50px;
    position: relative;
    outline: none;
    cursor: pointer;
    transition: background var(--transition-speed), border-color var(--transition-speed);
}

.darkmode-toggle input::before {
    content: "";
    width: 25px;
    height: 25px;
    background: var(--header-bg-color);
    border-radius: 50%;
    position: absolute;
    top: -1px;
    left: -1px;
    transition: transform var(--transition-speed);
}

.darkmode-toggle input:checked {
    background: var(--header-bg-color);
}

.darkmode-toggle input:checked::before {
    transform: translateX(25px);
    background: var(--card-bg-color);
}

.darkmode-toggle label {
    margin-left: 10px;
    color: var(--header-text-color);
    font-size: 0.9rem;
}

/* Search bar */
.search-bar {
    margin: 2rem auto;
    text-align: center;
    max-width: 800px;
    padding: 0 1rem;
}

.search-bar input {
    width: 100%;
    padding: 1rem;
    border: 2px solid var(--search-border);
    border-radius: var(--border-radius);
    font-size: 1rem;
    background-color: var(--card-bg-color);
    color: var(--text-color);
    transition: border-color var(--transition-speed), box-shadow var(--transition-speed);
    outline: none;
}

.search-bar input:focus {
    border-color: var(--search-focus-border);
    box-shadow: 0 0 0 3px rgba(0, 120, 215, 0.2);
}

/* Main content area */
main {
    padding: 1rem 2rem 3rem;
    max-width: 1400px;
    margin: 0 auto;
}

/* Section styles */
section {
    margin-bottom: 3rem;
}

section h2 {
    font-size: 1.75rem;
    margin-bottom: 1.5rem;
    color: var(--section-title-color);
    padding-bottom: 0.5rem;
    border-bottom: 2px solid var(--card-border);
    transition: color var(--transition-speed);
}

/* Card container */
.card-container {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 1.5rem;
}

/* Card styles */
.card {
    background: var(--card-bg-color);
    border: 1px solid var(--card-border);
    border-radius: var(--border-radius);
    padding: 1.5rem;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    text-align: center;
    transition: transform var(--transition-speed), 
                box-shadow var(--transition-speed),
                background-color var(--transition-speed),
                border-color var(--transition-speed);
    height: 200px;
    position: relative;
    overflow: hidden;
    cursor: pointer;
}

.card.hidden {
    display: none;
}

.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: linear-gradient(90deg, #0078d7, #00b8d4);
    opacity: 0;
    transition: opacity var(--transition-speed);
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: var(--card-hover-shadow);
    border-color: var(--section-title-color);
}

.card:hover::before {
    opacity: 1;
}

.card-content {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    height: 100%;
    width: 100%;
}

.card-icon {
    font-size: var(--card-icon-size);
    color: var(--section-title-color);
    margin-bottom: 1rem;
    transition: transform var(--transition-speed), color var(--transition-speed);
}

.card:hover .card-icon {
    transform: scale(1.1);
}

.card a {
    text-decoration: none;
    color: var(--section-title-color);
    font-weight: 600;
    word-wrap: break-word;
    text-align: center;
    transition: color var(--transition-speed);
    font-size: 1.1rem;
    line-height: 1.4;
    /* Make the entire card clickable by stretching the link */
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    padding: 1.5rem;
    z-index: 10;
}

.card a:hover {
    text-decoration: none;
}

/* Footer */
footer {
    text-align: center;
    padding: 1.5rem;
    background-color: var(--header-bg-color);
    color: var(--header-text-color);
    transition: background-color var(--transition-speed), color var(--transition-speed);
    margin-top: 2rem;
}

footer p {
    margin: 0;
    font-size: 0.9rem;
}

/* Responsive adjustments */
@media (max-width: 768px) {
    header {
        padding: 1.5rem 1rem;
    }
    
    header h1 {
        font-size: 2rem;
    }
    
    .card-container {
        grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    }
    
    .card {
        height: 180px;
    }
}

@media (max-width: 480px) {
    main {
        padding: 1rem;
    }
    
    .card-container {
        grid-template-columns: 1fr;
    }
    
    .card {
        height: 160px;
    }
    
    .darkmode-toggle {
        top: 10px;
        right: 10px;
    }
}