:root {
    --primary: #2563eb;
    --primary-hover: #1d4ed8;
    --gray-light: #f9fafb;
    --gray-border: #e5e7eb;
    --gray-text: #374151;
    --radius: 18px;
    --shadow: 0 6px 16px rgba(0, 0, 0, 0.08)
}

.custom-event-card {
    max-width: 360px;
    margin: 40px auto;
    background: #fff;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    overflow: hidden;
    transition: transform .25s, box-shadow .25s;
    font-family: Inter, sans-serif
}

.custom-event-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, .12)
}

.event-header {
    background: linear-gradient(135deg, var(--primary), #60a5fa);
    color: #fff;
    padding: 28px 0;
    display: flex;
    align-items: center;
    justify-content: center
}

.event-date-container {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 18px;
    border-radius: 8px
}

.event-day1 {
    font-size: 48px;
    font-weight: 200;
    line-height: .9;
    margin-top: 0;
    color: #fff
}

.event-month-year {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    justify-content: center;
    text-transform: capitalize;
    line-height: 1.1
}

.event-month {
    font-size: 18px;
    font-weight: 600;
    color: #fff;
    padding: 0;
    border-radius: 6px;
    margin-bottom: 2px;
    letter-spacing: .02em
}

.event-year {
    font-size: 13px;
    color: #fff;
    margin-top: 2px
}

.event-info {
    padding: 20px;
    color: var(--gray-text);
    font-size: 15px;
    line-height: 1.6
}

.event-info p {
    margin: 8px 0;
    display: flex;
    align-items: center;
    gap: 6px
}

.event-action {
    padding: 20px;
    text-align: center;
    border-top: 1px solid var(--gray-border);
    background: var(--gray-light)
}

.btn-register {
    display: inline-block;
    background: var(--primary);
    color: #fff!important;
    padding: 12px 28px;
    border-radius: 9999px;
    font-weight: 600;
    text-decoration: none;
    transition: background .3s, transform .2s
}

.btn-register:hover {
    background: var(--primary-hover);
    transform: scale(1.05)
}

.btn-register.disabled {
    background: #9ca3af;
    pointer-events: none;
    color: #f3f4f6!important;
    cursor: not-allowed;
    transform: none
}

@media (max-width:480px) {
    .custom-event-card {
        max-width: 90%
    }
    .event-day {
        font-size: 36px;
        color: #fff
    }
    .event-date-container {
        gap: 6px;
        padding: 10px 14px
    }
}