:root {
    --bg-start: #07111f;
    --bg-end: #153255;
    --surface: rgba(8, 20, 37, 0.82);
    --surface-strong: rgba(255, 255, 255, 0.08);
    --text-main: #f7f2e8;
    --text-sub: #c5cfda;
    --accent: #ffc94d;
    --accent-strong: #ff8c42;
    --line: rgba(255, 255, 255, 0.14);
    --shadow: rgba(2, 6, 23, 0.45);
}

body.light-mode {
    --bg-start: #f7efe2;
    --bg-end: #ffd8a8;
    --surface: rgba(255, 250, 244, 0.86);
    --surface-strong: rgba(255, 149, 0, 0.09);
    --text-main: #1f2937;
    --text-sub: #5b6472;
    --accent: #f97316;
    --accent-strong: #dc2626;
    --line: rgba(31, 41, 55, 0.12);
    --shadow: rgba(180, 83, 9, 0.18);
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    min-height: 100vh;
    display: grid;
    place-items: center;
    padding: 24px;
    color: var(--text-main);
    font-family: "Segoe UI", "Apple SD Gothic Neo", sans-serif;
    background:
        radial-gradient(circle at top, rgba(255, 201, 77, 0.24), transparent 25%),
        linear-gradient(135deg, var(--bg-start), var(--bg-end));
    transition: background 0.3s ease, color 0.3s ease;
}

.container {
    width: min(100%, 760px);
    position: relative;
    padding: 32px;
    border: 1px solid var(--line);
    border-radius: 28px;
    background: var(--surface);
    backdrop-filter: blur(18px);
    box-shadow: 0 24px 60px var(--shadow);
}

.theme-toggle {
    position: absolute;
    top: 20px;
    right: 20px;
    padding: 10px 14px;
    border: 1px solid var(--line);
    border-radius: 999px;
    background: transparent;
    color: var(--text-main);
    cursor: pointer;
}

.eyebrow {
    margin: 0 0 8px;
    color: var(--accent);
    font-size: 0.82rem;
    font-weight: 700;
    letter-spacing: 0.24em;
}

h1 {
    margin: 0;
    font-size: clamp(2rem, 5vw, 3.5rem);
    line-height: 1.05;
}

.description {
    margin: 16px 0 0;
    max-width: 520px;
    color: var(--text-sub);
    font-size: 1rem;
    line-height: 1.6;
}

.control-panel,
.result-panel {
    margin-top: 28px;
    border: 1px solid var(--line);
    border-radius: 22px;
    background: var(--surface-strong);
}

.control-panel {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 18px;
    flex-wrap: wrap;
}

.pick-count-label {
    font-weight: 700;
}

.pick-count,
#generator-btn {
    border: none;
    border-radius: 999px;
}

.pick-count {
    min-width: 100px;
    padding: 12px 16px;
    color: #0f172a;
    background: #fff7db;
    border: 1px solid rgba(249, 115, 22, 0.32);
    font-size: 1rem;
    font-weight: 700;
    box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.35);
}

#generator-btn {
    padding: 14px 22px;
    background: linear-gradient(135deg, var(--accent), var(--accent-strong));
    color: #fff;
    font-size: 1rem;
    font-weight: 700;
    cursor: pointer;
    box-shadow: 0 12px 30px rgba(249, 115, 22, 0.28);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

#generator-btn:hover,
.theme-toggle:hover {
    transform: translateY(-2px);
}

.result-panel {
    padding: 22px;
}

.result-head {
    display: flex;
    justify-content: space-between;
    align-items: end;
    gap: 16px;
    flex-wrap: wrap;
}

.result-head h2,
.number-set-title {
    margin: 0;
}

#result-meta {
    margin: 0;
    color: var(--text-sub);
}

.lotto-numbers-container {
    margin-top: 18px;
    display: grid;
    gap: 16px;
}

.number-set {
    padding: 18px;
    border-radius: 18px;
    border: 1px solid var(--line);
    background: rgba(255, 255, 255, 0.05);
}

.number-set-header {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 14px;
}

.number-set-title {
    font-size: 1rem;
}

.number-row {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 10px;
}

.bonus-label {
    color: var(--accent);
    font-size: 1.4rem;
    font-weight: 900;
    line-height: 1;
    margin: 0 2px;
}

.bonus-ball {
    position: relative;
    border: 2px solid rgba(255, 255, 255, 0.65);
}

.bonus-ball::after {
    content: "+";
    position: absolute;
    top: -6px;
    right: -4px;
    width: 20px;
    height: 20px;
    display: grid;
    place-items: center;
    border-radius: 50%;
    background: #fff;
    color: #ef4444;
    font-size: 0.88rem;
    font-weight: 900;
    box-shadow: 0 4px 10px rgba(15, 23, 42, 0.18);
}

.lotto-number {
    width: 58px;
    height: 58px;
    display: grid;
    place-items: center;
    border-radius: 50%;
    color: #fff;
    font-weight: 800;
    font-size: 1.2rem;
    box-shadow: 0 10px 18px rgba(15, 23, 42, 0.2);
    animation: riseIn 0.35s ease both;
}

.range-1 {
    background: linear-gradient(135deg, #facc15, #f59e0b);
}

.range-2 {
    background: linear-gradient(135deg, #60a5fa, #2563eb);
}

.range-3 {
    background: linear-gradient(135deg, #ef4444, #b91c1c);
}

.range-4 {
    background: linear-gradient(135deg, #94a3b8, #475569);
}

.range-5 {
    background: linear-gradient(135deg, #34d399, #059669);
}

@keyframes riseIn {
    from {
        opacity: 0;
        transform: translateY(10px) scale(0.92);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

@media (max-width: 640px) {
    body {
        padding: 16px;
    }

    .container {
        padding: 24px 18px;
    }

    .theme-toggle {
        position: static;
        margin-bottom: 18px;
    }

    .control-panel {
        align-items: stretch;
    }

    .pick-count,
    #generator-btn {
        width: 100%;
    }

    .lotto-number {
        width: 52px;
        height: 52px;
        font-size: 1.05rem;
    }
}