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

:root {
    --bg-gradient: linear-gradient(135deg, #a8edf0 0%, #fed6e3 100%);
    --card: #ffffff;
    --text: #2d3436;
    --text-muted: #636e72;
    --text-soft: #555;
    --primary: #00b894;
    --primary-dark: #00896f;
    --primary-hover: #55efc4;
    --disabled-bg: #b2bec3;
    --disabled-shadow: #636e72;
    --accent-math: #ff7675;
    --accent-geo: #74b9ff;
    --accent-flip: #a78bfa;
    --accent-soon: #a29bfe;
    --badge-bg: #ffeaa7;
    --badge-text: #d63031;
    --shadow-card: 0 10px 20px rgba(0, 0, 0, 0.1);
    --shadow-card-hover: 0 15px 30px rgba(0, 0, 0, 0.15);
    --shadow-badge: 0 4px 6px rgba(0, 0, 0, 0.1);
    --radius-card: 24px;
    --radius-badge: 20px;
    --radius-btn: 50px;
}

body {
    font-family: 'Fredoka', cursive, sans-serif;
    background: var(--bg-gradient);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    color: var(--text);
}

.hero {
    text-align: center;
    padding: 40px 20px 20px;
}

.logo {
    font-size: 2.8rem;
    font-weight: 700;
    color: #4a3e3d;
    text-shadow: 3px 3px 0px #fff;
}

.tagline {
    font-size: 1.2rem;
    margin-top: 10px;
    color: var(--text-soft);
}

.container {
    width: 90%;
    max-width: 1100px;
    margin: 30px auto;
    flex: 1;
}

.game-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
    justify-content: center;
}

.game-card {
    background: var(--card);
    border-radius: var(--radius-card);
    padding: 30px 20px;
    text-align: center;
    position: relative;
    box-shadow: var(--shadow-card);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    border: 4px solid #fff;
}

.game-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-card-hover);
}

.card-math { border-color: var(--accent-math); }
.card-geo { border-color: var(--accent-geo); }
.card-flip { border-color: var(--accent-flip); }
.card-coming-soon { border-color: var(--accent-soon); }

.card-badge {
    position: absolute;
    top: -15px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--badge-bg);
    padding: 6px 16px;
    border-radius: var(--radius-badge);
    font-size: 0.85rem;
    font-weight: 700;
    color: var(--badge-text);
    box-shadow: var(--shadow-badge);
}

.card-icon {
    font-size: 4rem;
    margin: 15px 0 10px;
}

.game-card h2 {
    font-size: 1.8rem;
    margin-bottom: 10px;
    color: var(--text);
}

.game-card p {
    font-size: 1rem;
    color: var(--text-muted);
    margin-bottom: 25px;
    line-height: 1.4;
}

.play-btn {
    display: inline-block;
    padding: 14px 28px;
    font-family: inherit;
    font-size: 1.1rem;
    font-weight: 700;
    color: #ffffff;
    background: var(--primary);
    text-decoration: none;
    border-radius: var(--radius-btn);
    box-shadow: 0px 5px 0px var(--primary-dark);
    transition: transform 0.1s ease, background-color 0.15s ease, box-shadow 0.1s ease, color 0.15s ease;
    border: none;
    cursor: pointer;
}

.play-btn:hover {
    background: var(--primary-hover);
    color: var(--text);
}

.play-btn:active {
    transform: translateY(4px);
    box-shadow: 0px 1px 0px var(--primary-dark);
}

.play-btn:focus-visible {
    outline: 3px solid var(--primary-dark);
    outline-offset: 3px;
}

.play-btn.disabled {
    background: var(--disabled-bg);
    color: #ffffff;
    box-shadow: 0px 5px 0px var(--disabled-shadow);
    cursor: not-allowed;
}

.play-btn.disabled:hover {
    background: var(--disabled-bg);
    color: #ffffff;
}

footer {
    text-align: center;
    padding: 20px;
    font-size: 0.9rem;
    color: var(--text-muted);
}