:root {
    --primary-bg-color-dark: #121212;
    --secondary-bg-color-dark: #1e1e1e;
    --card-bg-color-dark: #2a2a2a;
    --primary-text-color-dark: #e0e0e0;
    --border-color-dark: #444;

    --primary-bg-color-light: #f4f4f9;
    --secondary-bg-color-light: #ffffff;
    --card-bg-color-light: #ffffff;
    --primary-text-color-light: #121212;
    --border-color-light: #ddd;

    --accent-color: #0078d4;
    --hover-color: #0098ff;
}

body {
    font-family: 'Inter', sans-serif;
    margin: 0;
    padding: 0;
    line-height: 1.6;
    transition: background-color 0.3s, color 0.3s;
}

/* Dark Theme (Default) */
body[data-theme="dark"] {
    background-color: var(--primary-bg-color-dark);
    color: var(--primary-text-color-dark);
}
body[data-theme="dark"] header,
body[data-theme="dark"] footer {
    background-color: var(--secondary-bg-color-dark);
    border-color: var(--border-color-dark);
}
body[data-theme="dark"] .tool-card {
    background-color: var(--card-bg-color-dark);
    border-color: var(--border-color-dark);
}
body[data-theme="dark"] .category-title {
    border-color: var(--border-color-dark);
}
body[data-theme="dark"] #auth-container {
    background-color: var(--primary-bg-color-dark);
}

/* Light Theme */
body[data-theme="light"] {
    background-color: var(--primary-bg-color-light);
    color: var(--primary-text-color-light);
}
body[data-theme="light"] header,
body[data-theme="light"] footer {
    background-color: var(--secondary-bg-color-light);
    border-color: var(--border-color-light);
}
body[data-theme="light"] .tool-card {
    background-color: var(--card-bg-color-light);
    border-color: var(--border-color-light);
    box-shadow: 0 2px 5px rgba(0,0,0,0.05);
}
body[data-theme="light"] .category-title {
    border-color: var(--border-color-light);
}
body[data-theme="light"] #auth-container {
    background-color: var(--primary-bg-color-light);
}
body[data-theme="light"] .tool-card:hover {
    box-shadow: 0 8px 20px rgba(0, 120, 212, 0.1);
}


header {
    padding: 0.5rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid;
}

.header-container {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.logo {
    height: 40px;
}

.header-container h1 {
    margin: 0;
    font-weight: 700;
    color: var(--accent-color);
}

.header-right {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

#clock {
    font-size: 1.1rem;
    font-weight: 300;
}

#auth-container {
    padding: 1rem 2rem;
    text-align: right;
}

#auth-container button {
    background-color: var(--accent-color);
    color: white;
    border: none;
    padding: 0.6rem 1.2rem;
    border-radius: 5px;
    cursor: pointer;
    font-size: 0.9rem;
    transition: background-color 0.3s ease;
}

#auth-container button:hover {
    background-color: var(--hover-color);
}

#user-info {
    display: flex;
    justify-content: flex-end;
    align-items: center;
    gap: 1rem;
}

/* --- Theme Switcher --- */
.theme-switcher-container {
    display: flex;
    align-items: center;
}
.theme-switcher {
    position: relative;
    display: inline-block;
    width: 50px;
    height: 26px;
}
.theme-switcher input {
    opacity: 0;
    width: 0;
    height: 0;
}
.slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: #ccc;
    transition: .4s;
    border-radius: 26px;
}
.slider:before {
    position: absolute;
    content: "";
    height: 18px;
    width: 18px;
    left: 4px;
    bottom: 4px;
    background-color: white;
    transition: .4s;
    border-radius: 50%;
}
input:checked + .slider {
    background-color: var(--accent-color);
}
input:checked + .slider:before {
    transform: translateX(24px);
}

#main-content {
    padding: 2rem;
}

.hidden {
    display: none !important;
}

.category-section {
    margin-bottom: 3rem;
}

.category-title {
    font-size: 2rem;
    font-weight: 700;
    color: var(--accent-color);
    border-bottom: 2px solid;
    padding-bottom: 0.5rem;
    margin-bottom: 1.5rem;
}

.tools-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 1.5rem;
}

.tool-card {
    border: 1px solid;
    border-radius: 8px;
    padding: 1.5rem;
    text-decoration: none;
    color: inherit;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    display: flex;
    flex-direction: column;
}

.tool-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 20px rgba(0, 120, 212, 0.2);
}

.tool-card h3 {
    margin: 0 0 0.5rem 0;
    color: var(--hover-color);
}

.tool-card p {
    margin: 0;
    font-size: 0.9rem;
    flex-grow: 1;
}

footer {
    text-align: center;
    padding: 1.5rem;
    margin-top: 2rem;
    border-top: 1px solid;
    font-size: 0.9rem;
    color: #888;
}

/* --- Easter Egg Animation --- */
.race-car {
    position: absolute;
    font-size: 2rem;
    top: 25px; /* Adjust to align with the clock */
    left: 100vw; /* Start off-screen on the right */
    animation: driveAcross 8s linear forwards;
}

@keyframes driveAcross {
    from {
        transform: translateX(0);
    }
    to {
        transform: translateX(-110vw); /* Move across the entire viewport width to the left */
    }
}