/* CSS Pendaftaran Santri Baru 
   SMP Plus Boarding School Miftahul Ulum Terisi
*/

:root { 
    --primary: #008444;      /* Hijau NU */
    --secondary: #D4AF37;    /* Emas NU */
    --whatsapp: #25D366;     /* Hijau WA */
    --bg: #f4f7f6; 
    --text-dark: #2c3e50;
    --white: #ffffff;
}

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

/* Header Section */
.header-container { 
    background-color: var(--white); 
    text-align: center; 
    border-bottom: 5px solid var(--secondary); 
    padding: 10px 0;
}

.header-image { 
    max-width: 1000px; 
    width: 100%; 
    height: auto; 
    display: block; 
    margin: 0 auto; 
}

/* Container & Card */
.container { 
    max-width: 700px; 
    margin: 30px auto 50px; 
    padding: 40px; 
    background: var(--white); 
    border-radius: 20px; 
    box-shadow: 0 15px 35px rgba(0,0,0,0.1); 
    border-top: 8px solid var(--primary);
    transition: transform 0.3s ease;
}

.container:hover {
    transform: translateY(-5px);
}

h3 { 
    font-size: 26px; 
    font-weight: 700; 
    margin-bottom: 5px; 
    text-transform: uppercase;
    letter-spacing: 1px;
}

.sub-title { 
    text-align: center; 
    font-size: 14px; 
    color: #666; 
    margin-bottom: 30px; 
    font-style: italic;
}

/* Form Elements */
label { 
    font-weight: 600; 
    display: block; 
    margin-top: 20px; 
    font-size: 0.85em; 
    color: var(--primary); 
}

input, select, textarea { 
    width: 100%; 
    padding: 14px; 
    margin-top: 8px; 
    border: 1px solid #ddd; 
    border-radius: 10px; 
    box-sizing: border-box; 
    font-size: 14px; 
    transition: all 0.3s ease;
    background-color: #fafafa;
}

input:focus, select:focus, textarea:focus { 
    outline: none; 
    border-color: var(--primary); 
    background-color: var(--white);
    box-shadow: 0 0 8px rgba(0, 132, 68, 0.15); 
}

/* Grid Layout */
.grid-2 { 
    display: grid; 
    grid-template-columns: 1fr 1fr; 
    gap: 20px; 
}

/* Button Group */
.button-group { 
    display: flex; 
    gap: 15px; 
    margin-top: 35px; 
}

button { 
    flex: 2; 
    background: var(--primary); 
    color: var(--white); 
    border: none; 
    padding: 18px; 
    border-radius: 12px; 
    font-weight: 700; 
    cursor: pointer; 
    transition: all 0.3s ease; 
    letter-spacing: 1px;
    font-size: 14px;
}

.btn-whatsapp { 
    background: var(--whatsapp); 
    text-transform: uppercase;
}

.btn-cancel { 
    flex: 1; 
    background: #95a5a6; 
}

button:hover { 
    opacity: 0.95; 
    transform: scale(1.02); 
    box-shadow: 0 8px 20px rgba(0,0,0,0.15); 
}

button:disabled {
    background: #bdc3c7;
    cursor: not-allowed;
    transform: none;
}

/* Responsive */
@media (max-width: 600px) { 
    .container {
        margin: 15px;
        padding: 25px;
    }
    .grid-2, .button-group { 
        grid-template-columns: 1fr; 
        flex-direction: column; 
    } 
}

/* --- Validasi Input Real-Time --- */

/* Gaya saat input tidak valid (saat difokuskan) */
input:invalid:focus {
    border-color: #e74c3c;
    box-shadow: 0 0 8px rgba(231, 76, 60, 0.2);
}

/* Pesan bantuan yang muncul otomatis jika input salah */
input:invalid:focus + .error-hint {
    display: block;
}

.error-hint {
    display: none;
    font-size: 11px;
    color: #e74c3c;
    margin-top: 5px;
    font-weight: 500;
}

/* Animasi getar sedikit jika ada error (opsional) */
@keyframes shake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-5px); }
    75% { transform: translateX(5px); }
}

.input-error {
    animation: shake 0.2s ease-in-out 0s 2;
    border-color: #e74c3c !important;
}