:root[data-theme="light"] {
    --bg-color: #f7f7f7;
    --text-color: #222222;
    --heading-color: #222222;
    --button-bg: #ffffff;
    --button-border: #e0e0e0;
    --button-hover-bg: #f0f0f0;
    --muted-color: #aaaaaa;
    --slider-off-bg: #cccccc;
    --slider-on-bg: #555555;
    --slider-knob: white;
}

:root[data-theme="dark"] {
    --bg-color: #111111;
    --text-color: #dddddd;
    --heading-color: #eeeeee;
    --button-bg: #1c1c1c;
    --button-border: #2e2e2e;
    --button-hover-bg: #252525;
    --muted-color: #555555;
    --slider-off-bg: #444444;
    --slider-on-bg: #888888;
    --slider-knob: #dddddd;
}

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

body {
    font-family: 'Inter', 'SF Pro Display', -apple-system, BlinkMacSystemFont, 'Arial', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    padding: 40px 20px;
    font-size: 22px;
    line-height: 1.4;
    transition: background-color 0.3s, color 0.3s;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    justify-content: center;
    align-items: center;
}

.container {
    max-width: 680px;
    width: 100%;
}

.header {
    text-align: center;
    margin-bottom: 40px;
    display: flex;
    flex-direction: column;
    align-items: center;
}

h1 {
    font-size: 36px;
    font-weight: 600;
    color: var(--heading-color);
    margin-bottom: 16px;
}

.links {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.link-button {
    background-color: var(--button-bg);
    color: var(--text-color);
    border: 1px solid var(--button-border);
    border-radius: 10px;
    padding: 22px 28px;
    font-size: 28px;
    cursor: pointer;
    text-align: left;
    text-decoration: none;
    transition: background-color 0.2s;
    display: flex;
    align-items: center;
}

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

.emoji {
    font-size: 34px;
    margin-right: 16px;
    display: inline-block;
}

.theme-toggle {
    display: flex;
    align-items: center;
    gap: 10px;
    cursor: pointer;
    user-select: none;
}

.toggle-switch {
    position: relative;
    display: inline-block;
    width: 52px;
    height: 28px;
}

.toggle-switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: var(--slider-off-bg);
    transition: background-color 0.3s;
    border-radius: 28px;
}

.slider:before {
    position: absolute;
    content: "";
    height: 20px;
    width: 20px;
    left: 4px;
    bottom: 4px;
    background-color: var(--slider-knob);
    transition: transform 0.3s;
    border-radius: 50%;
}

input:checked + .slider {
    background-color: var(--slider-on-bg);
}

input:checked + .slider:before {
    transform: translateX(24px);
}

.toggle-switch:focus-visible {
    outline: 2px solid var(--text-color);
    outline-offset: 3px;
    border-radius: 28px;
}

.theme-icon {
    font-size: 20px;
}

.footer {
    margin-top: 32px;
    font-size: 14px;
    color: var(--muted-color);
    text-align: center;
}

.footer a {
    color: var(--muted-color);
    text-decoration: none;
}

.footer a:hover {
    color: var(--text-color);
}

@media (max-width: 600px) {
    h1 {
        font-size: 30px;
    }

    .link-button {
        font-size: 24px;
        padding: 18px 20px;
    }

    .emoji {
        font-size: 28px;
    }
}