:root {
    color-scheme: dark;
    --font-family: "Trebuchet MS", "Segoe UI", sans-serif;
    --page-text: #f8f3ee;
    --page-bg: #15171c;
    --page-pattern: url("data:image/svg+xml,%3Csvg width='42' height='44' viewBox='0 0 42 44' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23272b33' fill-opacity='0.42'%3E%3Cpath d='M0 0h42v44H0V0zm1 1h40v20H1V1zM0 23h20v20H0V23zm22 0h20v20H22V23z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
    --panel-bg: rgba(7, 10, 16, 0.64);
    --panel-border: rgba(255, 255, 255, 0.08);
    --panel-shadow: 0 18px 45px rgba(0, 0, 0, 0.35);
    --button-text: #ffffff;
    --button-bg: linear-gradient(90deg, #ff8a00, #e52e71);
    --button-shadow: 0 0 15px rgba(229, 46, 113, 0.5), 0 0 30px rgba(255, 138, 0, 0.5);
    --button-shadow-hover: 0 0 25px rgba(229, 46, 113, 0.8), 0 0 45px rgba(255, 138, 0, 0.8);
    --toggle-bg: rgba(255, 255, 255, 0.08);
    --toggle-border: rgba(255, 255, 255, 0.14);
    --toggle-text: #f6ddcc;
}

body.light-mode {
    color-scheme: light;
    --page-text: #2a2430;
    --page-bg: #f4ede4;
    --page-pattern: url("data:image/svg+xml,%3Csvg width='80' height='80' viewBox='0 0 80 80' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='%23d7c7b4' fill-opacity='0.35'%3E%3Cpath d='M0 0h80v80H0z'/%3E%3Cpath d='M0 40h80M40 0v80' stroke='%23efe4d7' stroke-width='2'/%3E%3C/g%3E%3C/svg%3E");
    --panel-bg: rgba(255, 250, 244, 0.82);
    --panel-border: rgba(84, 57, 34, 0.08);
    --panel-shadow: 0 18px 40px rgba(121, 84, 53, 0.18);
    --toggle-bg: rgba(255, 255, 255, 0.7);
    --toggle-border: rgba(84, 57, 34, 0.12);
    --toggle-text: #6f3d1d;
}

* {
    box-sizing: border-box;
}

body {
    font-family: var(--font-family);
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    padding: 2rem;
    background-color: var(--page-bg);
    background-image: var(--page-pattern), radial-gradient(circle at top, rgba(255, 138, 0, 0.14), transparent 34%);
    color: var(--page-text);
    margin: 0;
    transition: background-color 0.3s ease, color 0.3s ease;
}

.container {
    width: min(100%, 760px);
    text-align: center;
    background: var(--panel-bg);
    padding: 2rem;
    border-radius: 24px;
    border: 1px solid var(--panel-border);
    box-shadow: var(--panel-shadow);
    backdrop-filter: blur(18px);
    transition: background 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
}

.toolbar {
    display: flex;
    justify-content: flex-end;
    margin-bottom: 1rem;
}

.theme-toggle {
    border: 1px solid var(--toggle-border);
    background: var(--toggle-bg);
    color: var(--toggle-text);
    padding: 0.7rem 1.1rem;
    border-radius: 999px;
    cursor: pointer;
    font-size: 0.95rem;
    font-weight: 700;
    letter-spacing: 0.03em;
    transition: transform 0.2s ease, background 0.3s ease, color 0.3s ease;
}

.theme-toggle:hover {
    transform: translateY(-2px);
}

h1 {
    font-size: clamp(2.2rem, 6vw, 3.5rem);
    margin-bottom: 2rem;
    text-transform: uppercase;
    letter-spacing: 2px;
    background: linear-gradient(90deg, #ff8a00, #e52e71);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.lotto-numbers {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 1rem;
    margin-bottom: 2rem;
    min-height: 50px;
}

#generate-btn {
    background: var(--button-bg);
    color: var(--button-text);
    border: none;
    padding: 1rem 2rem;
    font-size: 1.2rem;
    border-radius: 50px;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: var(--button-shadow);
}

#generate-btn:hover {
    transform: translateY(-3px);
    box-shadow: var(--button-shadow-hover);
}

@media (max-width: 640px) {
    body {
        padding: 1rem;
    }

    .container {
        padding: 1.5rem;
    }

    .toolbar {
        justify-content: center;
    }

    #generate-btn,
    .theme-toggle {
        width: 100%;
    }
}