:root {
    --primary-color: #007AFF;
    --secondary-color: #5856D6;
    --background-color: #F2F2F7;
    --card-background: #FFFFFF;
    --text-color: #000000;
    --shadow-color: rgba(0, 0, 0, 0.1);
    --transition-speed: 0.3s;
    --accent-color: #ff3b30; /* For badges and highlights */
}

[data-theme="dark"] {
    --primary-color: #0A84FF;
    --secondary-color: #5E5CE6;
    --background-color: #000000;
    --card-background: #1C1C1E;
    --text-color: #FFFFFF;
    --shadow-color: rgba(255, 255, 255, 0.1);
    --accent-color: #ff5e55; /* Slightly brighter for dark mode */
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    font-display: swap;
    background-color: var(--background-color);
    color: var(--text-color);
    margin: 0;
    padding: 20px;
    transition: background-color var(--transition-speed), color var(--transition-speed);
    will-change: background-color, color;
    text-rendering: optimizeSpeed;
}

.theme-switch {
    position: fixed;
    top: 20px;
    right: 20px;
    background: var(--card-background);
    border: none;
    border-radius: 50%;
    width: 40px;
    height: 40px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 2px 10px var(--shadow-color);
    transition: transform var(--transition-speed), box-shadow var(--transition-speed);
    will-change: transform;
    z-index: 100;
}

.theme-switch:hover {
    transform: scale(1.1);
    box-shadow: 0 4px 15px var(--shadow-color);
}

.theme-switch svg {
    width: 20px;
    height: 20px;
    color: var(--text-color);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
    overflow-x: hidden;
}

header {
    text-align: center;
    margin-bottom: 2rem;
}

.header-content {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 1rem;
}

.site-logo {
    width: 48px;
    height: 48px;
    object-fit: contain;
}

h1 {
    font-size: 2.5rem;
    margin: 0;
    color: var(--text-color);
}

.category-section {
    margin-bottom: 40px;
    content-visibility: auto;
    contain-intrinsic-size: 0 500px;
}

.category-title {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.8rem;
    margin-bottom: 20px;
    color: var(--text-color);
}

.category-title svg {
    width: 24px;
    height: 24px;
    color: var(--primary-color);
}

.tools-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 20px;
    contain: layout style;
}

.tool-card {
    background: var(--card-background);
    border-radius: 12px;
    padding: 20px;
    text-decoration: none;
    color: var(--text-color);
    box-shadow: 0 2px 10px var(--shadow-color);
    transition: transform var(--transition-speed), box-shadow var(--transition-speed);
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    will-change: transform;
    contain: layout style;
    position: relative;
}

.tool-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 5px 20px var(--shadow-color);
}

.tool-card img {
    width: 48px;
    height: 48px;
    margin-bottom: 15px;
    border-radius: 8px;
    object-fit: cover;
}

.tool-card h3 {
    margin: 0 0 10px 0;
    font-size: 1.2rem;
}

.tool-card p {
    margin: 0;
    font-size: 0.9rem;
    opacity: 0.8;
}

.tool-card img:not([src]) {
    animation: pulse 1.5s infinite;
}

@keyframes pulse {
    0% {
        background-color: var(--shadow-color);
    }
    50% {
        background-color: var(--card-background);
    }
    100% {
        background-color: var(--shadow-color);
    }
}

/* Favorite Button Styles */
.tool-card {
    position: relative; /* Needed for absolute positioning of the button */
}

.favorite-btn {
    position: absolute;
    top: 10px;
    right: 10px;
    background: none;
    border: none;
    font-size: 1.5rem; /* Adjust size as needed */
    cursor: pointer;
    color: var(--text-color); /* Default star color */
    opacity: 0.5; /* Make it slightly transparent by default */
    transition: color var(--transition-speed), opacity var(--transition-speed), transform var(--transition-speed);
    padding: 0;
    line-height: 1;
    z-index: 2;
}

.favorite-btn:hover {
    opacity: 1;
    transform: scale(1.2);
}

.favorite-btn.active {
    color: #FFCC00; /* Gold color for active star */
    opacity: 1;
}

/* Favorites Section Styles */
#favorites-section {
    border-bottom: 1px solid var(--shadow-color); /* Optional: Add a separator */
    padding-bottom: 20px; /* Add some spacing below the title */
}

/* New Tool Badge Styles */
.new-tool-badge {
    position: absolute;
    top: 8px;
    left: 8px;
    background-color: var(--accent-color);
    color: #fff;
    font-size: 0.65rem;
    padding: 2px 6px;
    border-radius: 4px;
    font-weight: bold;
    z-index: 1;
    animation: pulse-badge 1.5s infinite alternate;
}

@keyframes pulse-badge {
    0% {
        background-color: var(--accent-color);
        transform: scale(1);
    }
    50% {
        background-color: color-mix(in srgb, var(--accent-color) 80%, white);
        transform: scale(1.1);
    }
    100% {
        background-color: var(--accent-color);
        transform: scale(1);
    }
}

/* Recently Added Section Styles */
#recently-added-section .category-title svg {
    color: var(--accent-color);
}

/* Search Styles */
.search-container {
    display: flex;
    max-width: 600px;
    margin: 20px auto;
    position: relative;
}

#search-input {
    flex: 1;
    padding: 12px 20px;
    border-radius: 50px;
    border: 1px solid var(--shadow-color);
    background-color: var(--card-background);
    color: var(--text-color);
    font-size: 1rem;
    transition: all var(--transition-speed);
    width: 100%;
    box-shadow: 0 2px 10px var(--shadow-color);
}

#search-input:focus {
    outline: none;
    box-shadow: 0 4px 15px var(--shadow-color);
    border-color: var(--primary-color);
}

#search-button {
    position: absolute;
    right: 10px;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    cursor: pointer;
    color: var(--text-color);
    opacity: 0.7;
    transition: opacity var(--transition-speed);
}

#search-button:hover {
    opacity: 1;
}

#search-results-section {
    margin-top: 20px;
    border-bottom: 1px solid var(--shadow-color);
    padding-bottom: 20px;
}

#no-results-message {
    text-align: center;
    padding: 20px;
    color: var(--text-color);
    opacity: 0.7;
}

#favorites-section .category-title svg {
    color: #FFCC00; /* Match active star color */
}

#no-favorites-message {
    width: 100%;
    text-align: center;
    color: var(--text-color);
    opacity: 0.7;
    padding: 20px;
    grid-column: 1 / -1; /* Make it span the full grid width if grid is active */
}

/* Font display optimization */
/* 
Instead of an incomplete @font-face rule, we're relying on the system font stack
already defined in the body. The previous rule was causing validation errors 
because it was missing the required 'src' property.
*/

@media (max-width: 768px) {
    body {
        padding: 10px;
    }

    .container {
        padding: 10px;
    }

    header h1 {
        font-size: 2rem;
    }

    .category-title {
        font-size: 1.5rem;
    }

    .tools-grid {
        grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
        gap: 15px;
    }

    .tool-card {
        padding: 15px;
    }

    .tool-card img {
        width: 40px;
        height: 40px;
    }

    .tool-card h3 {
        font-size: 1.1rem;
    }

    .tool-card p {
        font-size: 0.8rem;
    }
}

@media (max-width: 480px) {
.tools-grid {
    grid-template-columns: repeat(2, 1fr);
}

    .theme-switch {
        top: 10px;
        right: 10px;
        width: 35px;
        height: 35px;
    }
}