@import url("https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600&display=swap");

:root {
    --bg-color: #f5f5f7;
    --card-bg: rgba(255, 255, 255, 0.8);
    --text-color: #1d1d1f;
    --secondary-text: #86868b;
    --accent-color: #0071e3;
    --accent-hover: #0077ed;
    --ball-bg: #f5f5f7;
    --ball-text: #1d1d1f;
    --border-color: rgba(0, 0, 0, 0.1);
}

body.light-mode {
    --bg-color: #f5f5f7;
    --card-bg: rgba(255, 255, 255, 0.8);
    --text-color: #1d1d1f;
    --secondary-text: #86868b;
    --ball-bg: #ffffff;
    --ball-text: #1d1d1f;
    --border-color: rgba(0, 0, 0, 0.1);
}

body:not(.light-mode) {
    --bg-color: #000000;
    --card-bg: rgba(28, 28, 30, 0.8);
    --text-color: #f5f5f7;
    --secondary-text: #86868b;
    --ball-bg: #2c2c2e;
    --ball-text: #f5f5f7;
    --border-color: rgba(255, 255, 255, 0.1);
}

body {
    margin: 0;
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    transition: background-color 0.5s cubic-bezier(0.28, 0.11, 0.32, 1);
    -webkit-font-smoothing: antialiased;
}

.theme-toggle {
    position: fixed;
    top: 30px;
    right: 30px;
    z-index: 100;
}

#theme-btn {
    background: var(--card-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--border-color);
    color: var(--text-color);
    padding: 8px 16px;
    border-radius: 20px;
    cursor: pointer;
    font-size: 0.85rem;
    font-weight: 500;
    transition: all 0.3s ease;
}

.container {
    background-color: var(--card-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    padding: 3rem;
    border-radius: 24px;
    text-align: center;
    width: 90%;
    max-width: 500px;
    border: 1px solid var(--border-color);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
}

h1 {
    font-size: 2.5rem;
    font-weight: 600;
    letter-spacing: -0.02em;
    margin-bottom: 0.5rem;
}

p.subtitle {
    color: var(--secondary-text);
    font-size: 1.1rem;
    margin-bottom: 2.5rem;
}

.lotto-display {
    display: flex;
    justify-content: center;
    gap: 0.75rem;
    margin-bottom: 3rem;
    min-height: 60px;
}

.lotto-ball {
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background-color: var(--ball-bg);
    color: var(--ball-text);
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 1.25rem;
    font-weight: 600;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
    border: 1px solid var(--border-color);
    animation: slideUp 0.5s cubic-bezier(0.23, 1, 0.32, 1) forwards;
    opacity: 0;
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

#generate-btn {
    background-color: var(--accent-color);
    color: white;
    border: none;
    padding: 14px 28px;
    font-size: 1rem;
    font-weight: 500;
    border-radius: 30px;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

#generate-btn:hover {
    background-color: var(--accent-hover);
    transform: scale(1.02);
}

#generate-btn:active {
    transform: scale(0.98);
}