/* Tabs */
.tabs-container {
    padding: 40px 0;
}

.tabs {
    display: flex;
    gap: 8px;
    justify-content: center;
    border-bottom: 1px solid var(--border-subtle);
    margin-bottom: 60px;
}

.tab {
    padding: 16px 40px;
    background: transparent;
    border: none;
    color: var(--text-secondary);
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    border-bottom: 2px solid transparent;
    font-family: 'Inter', sans-serif;
    letter-spacing: 0.3px;
}

.tab:hover {
    color: var(--text-primary);
}

.tab.active {
    color: var(--accent-cyan);
    border-bottom-color: var(--accent-cyan);
}

/* Tab Content */
.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
}

/* Events Grid */
.events-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 32px;
}

.event-card {
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    border: 1px solid var(--border-subtle);
    border-radius: 12px;
    padding: 40px;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
}

.event-card:hover {
    border-color: var(--glass-border);
    box-shadow: 
        0 16px 40px rgba(0, 0, 0, 0.2),
        0 0 0 1px var(--border-subtle);
}

.event-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 24px;
}

.event-title {
    font-size: 26px;
    font-weight: 600;
    color: var(--text-primary);
    letter-spacing: -0.3px;
}

.event-badge {
    background: linear-gradient(135deg, var(--accent-cyan), var(--accent-cyan-dark));
    color: var(--bg-primary);
    padding: 8px 20px;
    border-radius: 6px;
    font-size: 11px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.event-badge.past {
    background: linear-gradient(135deg, var(--text-muted), #6B7280);
}

.event-details {
    display: flex;
    gap: 32px;
    margin-bottom: 24px;
}

.event-detail-item {
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--text-secondary);
    font-size: 15px;
}

.event-detail-item span:first-child {
    font-size: 18px;
}

.event-description {
    font-size: 16px;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 28px;
}

.event-actions {
    display: flex;
    gap: 16px;
}

.btn-register {
    background: linear-gradient(135deg, var(--accent-cyan), var(--accent-cyan-dark));
    color: var(--text-primary);
    border: none;
    padding: 14px 32px;
    font-size: 14px;
    font-weight: 600;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    text-transform: uppercase;
    letter-spacing: 1.2px;
    text-decoration: none;
    display: inline-block;
    box-shadow: 0 4px 16px rgba(34, 211, 238, 0.2);
}

.btn-register:hover {
    transform: translateY(-2px);
    box-shadow: 
        0 8px 24px rgba(34, 211, 238, 0.3),
        0 0 48px rgba(34, 211, 238, 0.2);
}

.btn-register.past {
    background: var(--glass-bg);
    color: var(--text-muted);
    cursor: default;
    box-shadow: none;
}

.btn-register.past:hover {
    transform: none;
    box-shadow: none;
}

/* Responsive Design */
@media (max-width: 768px) {
    .tabs-container {
        padding: 30px 0;
    }

    .tabs {
        margin-bottom: 40px;
    }

    .tab {
        padding: 14px 24px;
        font-size: 14px;
    }

    .event-card {
        padding: 28px 24px;
    }

    .event-header {
        flex-direction: column;
        gap: 16px;
    }

    .event-title {
        font-size: 22px;
    }

    .event-details {
        flex-direction: column;
        gap: 12px;
    }

    .event-actions {
        flex-direction: column;
    }

    .btn-register {
        width: 100%;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .event-title {
        font-size: 20px;
    }
}