:root {
    color-scheme: light dark;
    --bg: #f7f6f3;
    --surface: #ffffff;
    --text: #121416;
    --muted: #5a6570;
    --border: #e6e1d8;
    --accent: #2f6fec;
    --shadow: 0 18px 40px rgba(18, 20, 22, 0.12);
    --button-bg: #121416;
    --button-text: #ffffff;
    --toggle-bg: #ffffff;
    --toggle-text: #121416;
}

:root[data-theme="dark"] {
    --bg: #0f1215;
    --surface: #1a1f24;
    --text: #e9eef3;
    --muted: #9aa6b2;
    --border: #2b333b;
    --accent: #8bb3ff;
    --shadow: 0 20px 50px rgba(0, 0, 0, 0.45);
    --button-bg: #e9eef3;
    --button-text: #0f1215;
    --toggle-bg: #0f1215;
    --toggle-text: #e9eef3;
}

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

body {
    margin: 0;
    font-family: "Space Grotesk", "Trebuchet MS", sans-serif;
    background: radial-gradient(circle at top, rgba(47, 111, 236, 0.08), transparent 55%),
        radial-gradient(circle at 20% 20%, rgba(251, 196, 0, 0.12), transparent 40%),
        var(--bg);
    color: var(--text);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 32px 16px;
    transition: background 0.3s ease, color 0.3s ease;
}

.container {
    width: min(720px, 100%);
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 24px;
    padding: 32px;
    box-shadow: var(--shadow);
    transition: background 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}

.top-bar {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    margin-bottom: 24px;
}

h1 {
    font-size: clamp(24px, 3vw, 32px);
    margin: 0;
}

.theme-toggle {
    border: 1px solid var(--border);
    background: var(--toggle-bg);
    color: var(--toggle-text);
    padding: 10px 16px;
    border-radius: 999px;
    font-size: 14px;
    cursor: pointer;
    transition: transform 0.2s ease, background 0.3s ease, color 0.3s ease, border-color 0.3s ease;
}

.theme-toggle:hover {
    transform: translateY(-1px);
}

.lotto-numbers {
    display: grid;
    grid-template-columns: repeat(6, minmax(44px, 1fr));
    gap: 12px;
    margin: 24px 0 32px;
}

.number {
    display: grid;
    place-items: center;
    height: 52px;
    border-radius: 50%;
    font-weight: 600;
    font-size: 18px;
    color: #ffffff;
    box-shadow: inset 0 0 0 1px rgba(0, 0, 0, 0.08);
}

#generate-btn {
    width: 100%;
    border: none;
    background: var(--button-bg);
    color: var(--button-text);
    padding: 14px 20px;
    border-radius: 12px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.3s ease;
}

#generate-btn:hover {
    transform: translateY(-1px);
    box-shadow: 0 12px 20px rgba(0, 0, 0, 0.15);
}

.history {
    margin-top: 28px;
    border-top: 1px dashed var(--border);
    padding-top: 20px;
}

.history h2 {
    margin: 0 0 12px;
    font-size: 18px;
    color: var(--muted);
}

#history-list {
    list-style: none;
    padding: 0;
    margin: 0;
    display: grid;
    gap: 8px;
    font-size: 14px;
    color: var(--text);
}

#history-list li {
    padding: 10px 12px;
    border-radius: 10px;
    background: rgba(47, 111, 236, 0.08);
    border: 1px solid transparent;
}

@media (max-width: 540px) {
    .container {
        padding: 24px 18px;
    }

    .lotto-numbers {
        grid-template-columns: repeat(3, minmax(44px, 1fr));
    }
}