:root {
    --primary: #1B7D4F;
    --secondary: #066839;
    --background: #F5F7FA;
    --card-bg: #ffffff;
    --text: #1A202C;
    --header-bg: #18392B;
    --border: #E2E8F0;
    --accent: #48BB78;
    --error: #F56565;
    --success: #48BB78;
}
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}
body {
    font-family: 'Inter', sans-serif;
    background: var(--background);
    color: var(--text);
    font-size: 14px;
    line-height: 1.4;
}
.header {
    background: var(--header-bg);
    color: #ffffff;
    padding: 12px 20px;
    text-align: center;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1200;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}
.header h1 {
    font-size: 20px;
    font-weight: 600;
    margin: 0;
    word-wrap: break-word;
}
.header p {
    font-size: 12px;
    margin: 4px 0 0;
}
.container {
    padding-top: 80px;
    max-width: 900px;
    margin: 0 auto;
}
.form-step {
    display: none;
    background: var(--card-bg);
    padding: 16px;
    border-radius: 8px;
    box-shadow: 0 4px 8px rgba(0,0,0,0.05);
    margin-bottom: 16px;
}
.form-step.active {
    display: block;
    animation: fadeIn 0.5s ease;
}
.dynamic-section {
    margin-top: 10px;
    border: 1px solid var(--border);
    padding: 12px;
    border-radius: 6px;
    background: #f9f9f9;
}
#review-section, #subjects-section {
    background-color: #e9ecef;
    padding: 16px;
    border-radius: 6px;
    font-size: 0.85em;
}
#reference-key {
    display: none;
    text-align: center;
    margin-top: 20px;
    font-size: 1.5em;
    color: var(--success);
    background: #d4edda;
    padding: 16px;
    border-radius: 6px;
}
.btn-add {
    margin-top: 10px;
    background: var(--accent);
    color: white;
    width: 100%;
    max-width: 200px;
    display: block;
    margin-left: auto;
    margin-right: auto;
}
.btn-primary {
    background: var(--primary);
    color: #ffffff;
    border: none;
    padding: 8px 16px;
    font-size: 14px;
}
.btn-primary:hover {
    background: #15663f;
}
.btn-secondary {
    background: var(--secondary);
    color: #ffffff;
    border: none;
    padding: 8px 16px;
    font-size: 14px;
}
.btn-secondary:hover {
    background: #054f2e;
}
.form-label {
    font-weight: 500;
    color: var(--text);
    font-size: 13px;
    margin-bottom: 4px;
}
.form-control, .form-select {
    border: 1px solid var(--border);
    background: #ffffff;
    font-size: 13px;
    padding: 6px 10px;
    height: 36px;
    text-align: left;
}
.form-control:focus, .form-select:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(27,125,79,0.1);
}
.form-check-input {
    margin-top: 6px;
}
.optional {
    color: #6c757d;
    font-style: italic;
    font-size: 12px;
}
.progress {
    margin-bottom: 16px;
    background: var(--border);
    height: 8px;
}
.progress-bar {
    background: var(--primary);
}
.table {
    font-size: 12px;
}
.table th, .table td {
    padding: 6px 8px;
}
.btn-container {
    text-align: center;
    margin-top: 16px;
}
.hidden {
    display: none;
}
.red-asterisk {
    color: red;
}
.school-section {
    margin-bottom: 10px;
    padding: 10px;
    border: 1px solid var(--border);
    border-radius: 6px;
}
.school-section h3 {
    font-size: 16px;
    margin-bottom: 10px;
}
.is-invalid {
    border-color: var(--error) !important;
}
.highlight-id {
    color: red;
    font-weight: bold;
}
@media (max-width: 768px) {
    .header h1 {
        font-size: 18px;
    }
    .header p {
        font-size: 11px;
    }
    .form-step {
        padding: 12px;
    }
    .row > div {
        margin-bottom: 12px;
    }
    .btn {
        width: 100%;
        margin-top: 6px;
    }
    .table {
        display: block;
        overflow-x: auto;
    }
}
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}