:root {
    /* Light Mode Colors (oklch) */
    --bg-color: oklch(98% 0.01 250);
    --container-bg: oklch(100% 0 0 / 80%);
    --text-primary: oklch(25% 0.02 250);
    --text-secondary: oklch(45% 0.02 250);
    --accent-color: oklch(65% 0.15 250);
    --accent-hover: oklch(60% 0.15 250);
    --ball-bg: oklch(95% 0.01 250);
    --ball-text: oklch(65% 0.15 250);
    /* Multi-layered shadows for depth */
    --shadow-sm: 0 2px 4px oklch(0% 0 0 / 5%);
    --shadow-md: 0 4px 8px oklch(0% 0 0 / 5%), 0 2px 4px oklch(0% 0 0 / 5%);
    --shadow-lg: 0 15px 35px oklch(0% 0 0 / 10%), 0 5px 15px oklch(0% 0 0 / 5%);
    --glass-border: 1px solid oklch(100% 0 0 / 20%);
}

body.dark-mode {
    /* Dark Mode Colors (oklch) */
    --bg-color: oklch(15% 0.02 250);
    --container-bg: oklch(20% 0.02 250 / 80%);
    --text-primary: oklch(90% 0.01 250);
    --text-secondary: oklch(75% 0.01 250);
    --accent-color: oklch(75% 0.12 250);
    --accent-hover: oklch(80% 0.12 250);
    --ball-bg: oklch(25% 0.02 250);
    --ball-text: oklch(75% 0.12 250);
    --shadow-lg: 0 15px 35px oklch(0% 0 0 / 30%), 0 5px 15px oklch(0% 0 0 / 20%);
    --glass-border: 1px solid oklch(100% 0 0 / 10%);
}

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

body {
    font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-primary);
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    overflow-x: hidden;
    transition: background-color 0.3s ease, color 0.3s ease;
}

/* Noise Texture Overlay */
.noise-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 1000;
    opacity: 0.05;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noiseFilter'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.65' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noiseFilter)'/%3E%3C/svg%3E");
}

.theme-toggle {
    position: fixed;
    top: 2rem;
    right: 2rem;
    z-index: 1001;
}

#toggle-theme {
    background: var(--container-bg);
    backdrop-filter: blur(10px);
    border: var(--glass-border);
    width: 3.5rem;
    height: 3.5rem;
    border-radius: 50%;
    cursor: pointer;
    box-shadow: var(--shadow-md);
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 1.5rem;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

#toggle-theme:hover {
    transform: scale(1.1) rotate(15deg);
    box-shadow: var(--shadow-lg);
}

.container {
    background-color: var(--container-bg);
    backdrop-filter: blur(12px);
    border: var(--glass-border);
    padding: 3rem;
    border-radius: 2.5rem;
    box-shadow: var(--shadow-lg);
    text-align: center;
    width: 90%;
    max-width: 650px;
    z-index: 10;
    transition: all 0.3s ease;
}

header {
    margin-bottom: 2.5rem;
}

h1 {
    font-size: 2.8rem;
    font-weight: 800;
    margin-bottom: 0.5rem;
    color: var(--accent-color);
    letter-spacing: -1px;
}

header p {
    color: var(--text-secondary);
    font-size: 1.1rem;
}

.action-area {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 2rem;
}

.primary-btn, .secondary-btn {
    padding: 1rem 2rem;
    font-size: 1.1rem;
    font-weight: 700;
    border-radius: 1.2rem;
    cursor: pointer;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    border: none;
}

.primary-btn {
    background-color: var(--accent-color);
    color: white;
    flex: 2;
}

.primary-btn:hover:not(:disabled) {
    background-color: var(--accent-hover);
    transform: translateY(-3px);
    box-shadow: 0 8px 20px oklch(var(--accent-color) / 40%);
}

.secondary-btn {
    background-color: var(--ball-bg);
    color: var(--text-primary);
    flex: 1;
    border: var(--glass-border);
}

.secondary-btn:hover:not(:disabled) {
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
}

button:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none !important;
}

.numbers-container {
    display: flex;
    justify-content: center;
    gap: 1.2rem;
    margin: 2rem 0;
    flex-wrap: wrap;
    min-height: 100px;
}

.history-section {
    margin-top: 3rem;
    padding-top: 2rem;
    border-top: var(--glass-border);
    text-align: left;
}

.history-section h3 {
    font-size: 1.2rem;
    margin-bottom: 1.5rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.history-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.8rem;
}

.history-item {
    background: oklch(100% 0 0 / 5%);
    padding: 0.8rem 1.2rem;
    border-radius: 1rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    animation: slideIn 0.4s ease-out forwards;
    border: var(--glass-border);
}

.history-numbers {
    font-family: 'Courier New', Courier, monospace;
    font-weight: 700;
    color: var(--accent-color);
    font-size: 1.1rem;
}

.history-time {
    font-size: 0.8rem;
    color: var(--text-secondary);
}

@keyframes slideIn {
    from { transform: translateX(-20px); opacity: 0; }
    to { transform: translateX(0); opacity: 1; }
}

lotto-ball {
    display: block;
}