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

body {
    font-family: 'Sarabun', sans-serif;
    background-color: #f7f3e9;
    min-height: 100vh;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.main-header {
    background-color: #a00000;
    color: white;
    padding: 15px 0;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

.main-nav ul {
    list-style: none;
    display: flex;
    justify-content: flex-end;
    gap: 30px;
}

.main-nav li {
    display: inline;
}

.main-nav a {
    text-decoration: none;
    color: white;
    font-weight: 300;
    transition: color 0.3s ease;
}

.main-nav a:hover,
.main-nav a.active {
    color: #ffd700;
}

.register-container {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: calc(100vh - 60px);
    padding: 30px 0;
}

.register-box {
    background-color: #f7f4e9;
    width: 100%;
    max-width: 420px;
    padding: 35px 30px;
    border-radius: 8px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
    text-align: center;
}

.register-box h2 {
    color: #8b0000;
    font-size: 26px;
    font-weight: 500;
    margin-bottom: 25px;
}

.input-group {
    margin-bottom: 16px;
}

.input-group input {
    width: 100%;
    padding: 10px 16px;
    border: 1.5px solid #a0a0a0;
    border-radius: 10px;
    font-family: 'Sarabun', sans-serif;
    font-size: 14px;
    outline: none;
    background-color: #ffffff;
}

.input-group input:focus {
    border-color: #8b0000;
}

.input-group input::placeholder {
    color: #a0a0a0;
}

.btn-group {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 25px;
    padding: 0 10px;
}

.btn-submit {
    background-color: #72db26;
    color: #000000;
    border: none;
    padding: 8px 24px;
    font-family: 'Sarabun', sans-serif;
    font-size: 14px;
    cursor: pointer;
    border-radius: 4px;
    font-weight: bold;
}

.btn-cancel {
    background-color: #ff3b30;
    color: white;
    text-decoration: none;
    padding: 8px 24px;
    font-size: 14px;
    border-radius: 4px;
    display: inline-block;
    font-weight: bold;
}

.btn-submit:hover,
.btn-cancel:hover {
    opacity: 0.85;
}