:root {
    --primary-color: #005f73;
    --secondary-color: #0a9396;
    --accent-color: #94d2bd;
    --text-color: #333;
    --bg-color: #e9f5db;
    --card-bg: #ffffff;
    --border-color: #ccc;
    --error-color: #dc3545;
}

body {
    font-family: 'Poppins', sans-serif;
    margin: 0;
    padding: 0;
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
}

/* Header */
.header {
    background-color: var(--primary-color);
    color: white;
    padding: 30px 20px;
    text-align: center;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.header h1 {
    margin: 0;
    font-size: 2.5em;
    font-weight: 700;
}

.header p {
    margin: 5px 0 0;
    font-size: 1.1em;
    font-weight: 400;
}
.countdown-container {
    display: flex;
    justify-content: center;
    gap: 2rem;
    margin-bottom: 2rem;
    flex-wrap: wrap;
    text-align: center;
}

.countdown-box {
    background-color: rgba(255, 255, 255, 0.9);
    padding: 1rem 2rem;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    min-width: 250px;
}

.countdown-box h4 {
    margin: 0;
    color: var(--primary-color);
    font-weight: 600;
}

.countdown-box p {
    font-size: 1.5rem;
    font-weight: 700;
    margin: 0.5rem 0 0;
}
/* Main Content and Form */
.main-content {
    max-width: 900px;
    margin: 40px auto;
    padding: 20px;
}

.contest-info {
    background-color: var(--card-bg);
    padding: 30px;
    border-radius: 12px;
    box-shadow: 0 6px 18px rgba(0, 0, 0, 0.08);
    margin-bottom: 30px;
}

.contest-info h2 {
    color: var(--primary-color);
    font-size: 2em;
    border-bottom: 2px solid var(--accent-color);
    padding-bottom: 10px;
    margin-top: 0;
}

.event-details, .info-details {
    margin-bottom: 20px;
}

.event-details p, .info-details p {
    background-color: #f0f4f9;
    padding: 10px 15px;
    border-radius: 8px;
    margin: 5px 0;
}

.event-details {
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 15px;
}

.event-details p {
    flex: 1;
    min-width: 200px;
}

.info-details {
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 15px;
}

.info-details p {
    flex: 1;
    min-width: 250px;
}

.registration-form {
    background-color: var(--card-bg);
    padding: 40px;
    border-radius: 12px;
    box-shadow: 0 6px 18px rgba(0, 0, 0, 0.08);
}

.deadline-message {
    background-color: rgba(220, 53, 69, 0.1);
    color: var(--error-color);
    padding: 15px;
    border-radius: 8px;
    border: 1px solid var(--error-color);
    margin-bottom: 25px;
    text-align: center;
    font-weight: 600;
}

.form-group {
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 20px;
    margin-bottom: 25px;
}

.form-group legend {
    font-size: 1.25em;
    font-weight: 600;
    padding: 0 10px;
    color: var(--secondary-color);
}

.input-field {
    margin-bottom: 18px;
}

.input-field label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: var(--primary-color);
}

.input-field input, .input-field select {
    width: 100%;
    padding: 12px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-size: 1em;
    box-sizing: border-box;
    transition: border-color 0.3s, box-shadow 0.3s;
}

.input-field input:focus, .input-field select:focus {
    outline: none;
    border-color: var(--secondary-color);
    box-shadow: 0 0 0 3px rgba(10, 147, 150, 0.2);
}

.size-group {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
}

.checkbox-field {
    display: flex;
    align-items: center;
    margin-bottom: 25px;
}

.checkbox-field input[type="checkbox"] {
    margin-right: 10px;
    transform: scale(1.2);
}

.submit-btn {
    display: block;
    width: 100%;
    padding: 15px;
    font-size: 1.2em;
    font-weight: 600;
    color: white;
    background-color: var(--primary-color);
    border: none;
    border-radius: 8px;
    cursor: pointer;
    transition: background-color 0.3s, transform 0.2s;
}

.submit-btn:hover:enabled {
    background-color: var(--secondary-color);
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

.submit-btn:disabled {
    background-color: #6c757d;
    cursor: not-allowed;
}

/* Footer */
.footer {
    text-align: center;
    padding: 20px;
    margin-top: 40px;
    color: #fff;
    background-color: var(--primary-color);
    box-shadow: 0 -4px 12px rgba(0, 0, 0, 0.1);
}

/* Responsiveness */
@media (max-width: 768px) {
    .header h1 {
        font-size: 2em;
    }
    .main-content {
        margin: 20px;
        padding: 10px;
    }
    .contest-info, .registration-form {
        padding: 20px;
    }
    .event-details, .info-details {
        flex-direction: column;
        gap: 10px;
    }
    .size-group {
        grid-template-columns: 1fr;
    }
}