@import url('https://fonts.googleapis.com/css2?family=Sarabun:wght@300;400;500;600;700&display=swap');

body {
    font-family: 'Sarabun', sans-serif;
    background-color: #f4f6f9;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

/* Header & Navbar */
.navbar-tisi {
    background-color: #ffffff;
    box-shadow: 0 2px 10px rgba(0,0,0,0.08);
    padding: 10px 20px;
}
.brand-logo { color: #1a5276; font-weight: bold; font-size: 1.5rem; display: inline-block; margin-right: 5px; }
.brand-text { color: #28a745; font-size: 1.2rem; }

/* Main Content Alignment */
main {
    flex: 1;
    display: flex;
    align-items: center;
    padding: 50px 0;
}

/* Card Styling */
.tisi-card {
    background: #ffffff;
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.08);
    border: none;
    overflow: hidden;
}
.tisi-card-header {
    background: linear-gradient(135deg, #1a5276 0%, #2980b9 100%);
    color: #ffffff;
    padding: 25px 20px;
    text-align: center;
}
.tisi-card-header h4 { margin: 0; font-weight: 600; }
.tisi-logo { width: 70px; margin-bottom: 15px; }

/* Form Controls */
.form-control, .form-select {
    border-radius: 8px;
    padding: 10px 15px;
    border: 1px solid #ced4da;
}
.form-control:focus, .form-select:focus {
    border-color: #28a745;
    box-shadow: 0 0 0 0.2rem rgba(40, 167, 69, 0.25);
}
label { font-weight: 500; margin-bottom: 5px; color: #495057; }

/* Buttons */
.btn-green { 
    background-color: #28a745; 
    color: white; 
    border: none; 
    border-radius: 8px; 
    padding: 12px 25px; 
    font-weight: 600; 
    transition: all 0.3s; 
}
.btn-green:hover { background-color: #218838; transform: translateY(-2px); box-shadow: 0 4px 10px rgba(33, 136, 56, 0.3); }

/* Footer */
.tisi-footer {
    background-color: #ffffff;
    border-top: 1px solid #e9ecef;
    padding: 20px 0;
    text-align: center;
    font-size: 0.95rem;
    color: #6c757d;
}