:root {
    /* Color System */
    --color-primary: hsl(260, 85%, 60%);
    --color-primary-light: hsl(260, 85%, 70%);
    --color-primary-dark: hsl(260, 85%, 45%);
    --color-secondary: hsl(320, 85%, 55%);
    --color-accent: hsl(180, 85%, 55%);

    /* Background Colors */
    --color-bg-dark: hsl(240, 15%, 8%);
    --color-bg-card: rgba(255, 255, 255, 0.05);
    --color-bg-card-hover: rgba(255, 255, 255, 0.08);

    /* Text Colors */
    --color-text-primary: hsl(0, 0%, 98%);
    --color-text-secondary: hsl(0, 0%, 70%);
    --color-text-muted: hsl(0, 0%, 50%);

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;

    /* Border Radius */
    --radius-sm: 0.5rem;
    --radius-md: 1rem;
    --radius-lg: 1.5rem;
    --radius-full: 9999px;

    /* Shadows */
    --shadow-glow: 0 0 40px rgba(147, 51, 234, 0.3);
    --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.3);
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background-color: var(--color-bg-dark);
    color: var(--color-text-primary);
    line-height: 1.6;
    min-height: 100vh;
    overflow-x: hidden;
}

.background-gradient {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background:
        radial-gradient(circle at 20% 30%, rgba(147, 51, 234, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 80% 70%, rgba(219, 39, 119, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 50% 50%, rgba(6, 182, 212, 0.1) 0%, transparent 70%);
    z-index: -1;
    animation: pulseGradient 10s ease-in-out infinite;
}

@keyframes pulseGradient {

    0%,
    100% {
        opacity: 1;
    }

    50% {
        opacity: 0.8;
    }
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--spacing-lg);
    position: relative;
    z-index: 1;
}

header {
    text-align: center;
    margin-bottom: var(--spacing-2xl);
    padding-top: var(--spacing-xl);
}

.title {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.title-main {
    font-size: clamp(2.5rem, 8vw, 5rem);
    font-weight: 900;
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary), var(--color-accent));
    background-size: 200% 200%;
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    animation: gradientShift 5s ease infinite;
    letter-spacing: -0.02em;
}

.title-sub {
    font-size: clamp(0.875rem, 2vw, 1.125rem);
    font-weight: 400;
    color: var(--color-text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.15em;
}

@keyframes gradientShift {

    0%,
    100% {
        background-position: 0% 50%;
    }

    50% {
        background-position: 100% 50%;
    }
}

.card {
    background: var(--color-bg-card);
    backdrop-filter: blur(20px);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    margin-bottom: var(--spacing-lg);
    border: 1px solid rgba(255, 255, 255, 0.1);
    box-shadow: var(--shadow-card);
    transition: all 0.3s ease;
}

.card:hover {
    background: var(--color-bg-card-hover);
    transform: translateY(-2px);
    box-shadow: var(--shadow-card), var(--shadow-glow);
}

.card h2 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    text-align: center;
    color: var(--color-text-primary);
}

.hidden {
    display: none !important;
}

/* Config Section */
.config-controls {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    max-width: 500px;
    margin: 0 auto;
}

.input-group {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.input-group label {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--color-text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

input[type="datetime-local"] {
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.15);
    border-radius: var(--radius-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    color: var(--color-text-primary);
    font-size: 1rem;
    font-family: inherit;
    transition: all 0.3s ease;
    color-scheme: dark;
}

input[type="datetime-local"]:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(147, 51, 234, 0.2);
}

.primary-btn {
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
    border: none;
    border-radius: var(--radius-full);
    padding: var(--spacing-sm) var(--spacing-xl);
    color: white;
    font-size: 1.125rem;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.3s ease;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    box-shadow: 0 4px 15px rgba(147, 51, 234, 0.4);
}

.primary-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(147, 51, 234, 0.6);
}

.primary-btn:active {
    transform: translateY(0);
}

/* Countdown Section */
.countdown {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
}

.countdown-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-xs);
}

.countdown-value {
    font-size: clamp(2.5rem, 6vw, 4rem);
    font-weight: 900;
    background: linear-gradient(135deg, var(--color-primary-light), var(--color-accent));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    font-variant-numeric: tabular-nums;
    min-width: 2ch;
    text-align: center;
}

.countdown-label {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.countdown-separator {
    font-size: clamp(2rem, 5vw, 3rem);
    font-weight: 700;
    color: var(--color-text-secondary);
    opacity: 0.5;
}

/* Drawing Animation */
.drawing-animation {
    text-align: center;
    padding: 3rem 2rem;
}

.spinner-container {
    display: inline-block;
    position: relative;
    width: 120px;
    height: 120px;
}

.spinner {
    width: 100%;
    height: 100%;
    border: 8px solid rgba(255, 255, 255, 0.1);
    border-top-color: var(--color-primary);
    border-right-color: var(--color-secondary);
    border-radius: 50%;
    animation: spin 1.5s cubic-bezier(0.68, -0.55, 0.265, 1.55) infinite;
    box-shadow: 0 0 20px rgba(139, 92, 246, 0.3);
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

.status-text {
    color: var(--color-text-secondary);
    font-size: 1rem;
}

/* Winner Section */
.winner-number-container {
    display: flex;
    justify-content: center;
    align-items: center;
    margin: var(--spacing-xl) 0;
}

.winner-number {
    font-size: clamp(5rem, 15vw, 10rem);
    font-weight: 900;
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary), var(--color-accent));
    background-size: 200% 200%;
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    animation: gradientShift 3s ease infinite, popIn 0.6s cubic-bezier(0.68, -0.55, 0.265, 1.55);
    text-shadow: 0 0 80px rgba(147, 51, 234, 0.5);
}

@keyframes popIn {
    0% {
        transform: scale(0);
        opacity: 0;
    }

    100% {
        transform: scale(1);
        opacity: 1;
    }
}

.winner-subtitle {
    text-align: center;
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--color-text-secondary);
    animation: fadeIn 0.8s ease 0.3s both;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Verification Section */
.verification-card {
    background: rgba(255, 255, 255, 0.03);
}

.verification-card h3 {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    color: var(--color-accent);
}

.verification-grid {
    display: grid;
    gap: var(--spacing-sm);
}

.verification-item {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm);
    background: rgba(255, 255, 255, 0.03);
    border-radius: var(--radius-sm);
    border-left: 3px solid var(--color-primary);
}

.verification-label {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--color-text-secondary);
}

.verification-value {
    font-size: 0.875rem;
    color: var(--color-text-primary);
    word-break: break-all;
}

.verification-value.mono {
    font-family: 'Courier New', monospace;
    font-size: 0.75rem;
}

.verify-link {
    display: inline-block;
    margin-top: var(--spacing-md);
    color: var(--color-accent);
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
}

.verify-link:hover {
    color: var(--color-primary-light);
    transform: translateX(5px);
}

/* Footer */
footer {
    text-align: center;
    padding: var(--spacing-xl) 0;
    color: var(--color-text-muted);
    font-size: 0.875rem;
}

footer a {
    color: var(--color-primary-light);
    text-decoration: none;
    transition: color 0.3s ease;
}

footer a:hover {
    color: var(--color-accent);
}

/* Responsive Design */
@media (max-width: 768px) {
    .container {
        padding: var(--spacing-sm);
    }

    .card {
        padding: var(--spacing-md);
    }

    .countdown {
        gap: var(--spacing-xs);
    }

    .countdown-separator {
        display: none;
    }
}