/* CSS Variables */
:root {
    --primary: #e10600;
    --primary-dark: #b30500;
    --secondary: #15151e;
    --accent: #ff1e00;
    --bg-dark: #0a0a0f;
    --bg-card: #1a1a24;
    --text-primary: #ffffff;
    --text-secondary: #b0b0b8;
    --border: #2a2a34;
    --shadow: rgba(225, 6, 0, 0.2);
    --gradient-1: linear-gradient(135deg, #e10600 0%, #ff4500 100%);
    --gradient-2: linear-gradient(135deg, #15151e 0%, #2a2a34 100%);
}

/* Reset & Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: var(--bg-dark);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 2rem;
    width: 100%;
}

/* Header */
.header {
    background: var(--gradient-2);
    padding: 2rem 0;
    border-bottom: 2px solid var(--primary);
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(10px);
}

.header-content {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.header h1 {
    font-size: 2.5rem;
    font-weight: 800;
    display: flex;
    align-items: center;
    gap: 1rem;
    letter-spacing: -0.02em;
}

.header h1 i {
    color: var(--primary);
}

.subtitle {
    color: var(--text-secondary);
    font-size: 1rem;
    font-weight: 500;
}

/* Main Content */
main {
    flex: 1;
    padding: 3rem 0;
}

/* Bento Grid Layout */
.bento-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 1.5rem;
    grid-auto-flow: dense;
}

/* Race Card */
.race-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 1.5rem;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}

.race-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--gradient-1);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.3s ease;
}

.race-card:hover {
    transform: translateY(-4px);
    border-color: var(--primary);
    box-shadow: 0 8px 24px var(--shadow);
}

.race-card:hover::before {
    transform: scaleX(1);
}

/* Featured Cards (Sprint Weekends) */
.race-card.featured {
    grid-column: span 1;
    background: linear-gradient(135deg, var(--bg-card) 0%, rgba(225, 6, 0, 0.1) 100%);
    border-color: var(--primary);
}

.race-card.featured .sprint-badge {
    display: inline-flex;
}

/* Card Header */
.card-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 1rem;
}

.round-number {
    font-size: 0.875rem;
    font-weight: 700;
    color: var(--primary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.sprint-badge {
    display: none;
    align-items: center;
    gap: 0.25rem;
    background: var(--primary);
    color: white;
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
}

/* Card Content */
.race-name {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    line-height: 1.2;
}

.race-location {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-bottom: 1rem;
}

.race-location i {
    color: var(--primary);
}

/* Card Footer */
.card-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-top: 1rem;
    border-top: 1px solid var(--border);
}

.race-date {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.race-date i {
    color: var(--primary);
}

.view-details {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--primary);
    font-size: 0.875rem;
    font-weight: 600;
    transition: gap 0.3s ease;
}

.race-card:hover .view-details {
    gap: 0.75rem;
}

/* Dialog */
.race-dialog {
    border: none;
    border-radius: 24px;
    padding: 0;
    max-width: 600px;
    width: 90%;
    background: var(--bg-card);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
    color: var(--text-primary);
}

.race-dialog::backdrop {
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(8px);
}

.dialog-content {
    position: relative;
    padding: 2rem;
}

.close-btn {
    position: absolute;
    top: 1rem;
    right: 1rem;
    background: var(--secondary);
    border: 1px solid var(--border);
    border-radius: 50%;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.3s ease;
    color: var(--text-primary);
}

.close-btn:hover {
    background: var(--primary);
    border-color: var(--primary);
    transform: rotate(90deg);
}

.dialog-header {
    margin-bottom: 2rem;
}

.dialog-round {
    font-size: 0.875rem;
    font-weight: 700;
    color: var(--primary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 0.5rem;
}

.dialog-title {
    font-size: 2rem;
    font-weight: 800;
    margin-bottom: 0.5rem;
    line-height: 1.2;
}

.dialog-location {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-secondary);
    font-size: 1rem;
}

.dialog-location i {
    color: var(--primary);
}

.dialog-body {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.detail-section {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.detail-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem;
    background: var(--secondary);
    border-radius: 12px;
    border: 1px solid var(--border);
}

.detail-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: var(--bg-card);
    border-radius: 10px;
    color: var(--primary);
}

.detail-content {
    flex: 1;
}

.detail-label {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-bottom: 0.25rem;
}

.detail-value {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
}

.sprint-indicator {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: var(--primary);
    color: white;
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-size: 0.875rem;
    font-weight: 700;
    text-transform: uppercase;
    margin-top: 1rem;
}

/* Footer */
.footer {
    background: var(--secondary);
    padding: 2rem 0;
    text-align: center;
    border-top: 1px solid var(--border);
    margin-top: 4rem;
}

.footer p {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

/* Responsive Design */
@media (max-width: 768px) {
    .container {
        padding: 0 1rem;
    }

    .header h1 {
        font-size: 2rem;
    }

    .bento-grid {
        grid-template-columns: 1fr;
        gap: 1rem;
    }

    .race-card.featured {
        grid-column: span 1;
    }

    .dialog-content {
        padding: 1.5rem;
    }

    .dialog-title {
        font-size: 1.5rem;
    }
}

/* Animations */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.race-card {
    animation: fadeIn 0.5s ease forwards;
}

.race-card:nth-child(1) { animation-delay: 0.05s; }
.race-card:nth-child(2) { animation-delay: 0.1s; }
.race-card:nth-child(3) { animation-delay: 0.15s; }
.race-card:nth-child(4) { animation-delay: 0.2s; }
.race-card:nth-child(5) { animation-delay: 0.25s; }
.race-card:nth-child(6) { animation-delay: 0.3s; }