/* HCSS Survey System - Design System */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap');

:root {
    --hcss-teal: #008B8B;
    --hcss-teal-dark: #006666;
    --hcss-teal-light: #E0F7F7;
    --hcss-teal-50: #F0FDFD;
    --hcss-blue: #1565C0;
    --hcss-blue-dark: #0D47A1;
    --hcss-red: #C62828;
    --hcss-white: #FFFFFF;
    --hcss-gray-50: #F8FAFC;
    --hcss-gray-100: #F1F5F9;
    --hcss-gray-200: #E2E8F0;
    --hcss-gray-300: #CBD5E1;
    --hcss-gray-400: #94A3B8;
    --hcss-gray-500: #64748B;
    --hcss-gray-600: #475569;
    --hcss-gray-700: #334155;
    --hcss-gray-800: #1E293B;
    --hcss-gray-900: #0F172A;
    --hcss-error: #DC2626;
    --hcss-error-light: #FEF2F2;
    --hcss-success: #16A34A;
    --hcss-success-light: #F0FDF4;
    --hcss-warning: #D97706;
    --hcss-warning-light: #FFFBEB;

    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --border-radius: 8px;
    --border-radius-sm: 4px;
    --border-radius-lg: 12px;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.07), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -4px rgba(0, 0, 0, 0.04);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.05);
    --transition: all 0.2s ease;
}

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

html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-family);
    color: var(--hcss-gray-800);
    background-color: var(--hcss-gray-50);
    line-height: 1.6;
    min-height: 100vh;
}

/* --- Typography --- */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.3;
    color: var(--hcss-gray-900);
}

h1 { font-size: 1.875rem; }
h2 { font-size: 1.5rem; }
h3 { font-size: 1.25rem; }
h4 { font-size: 1.125rem; }

p { margin-bottom: 0.75rem; }

a {
    color: var(--hcss-teal);
    text-decoration: none;
    transition: var(--transition);
}

a:hover {
    color: var(--hcss-teal-dark);
    text-decoration: underline;
}

/* --- Buttons --- */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.625rem 1.25rem;
    font-family: var(--font-family);
    font-size: 0.875rem;
    font-weight: 500;
    line-height: 1.25;
    border: 1px solid transparent;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
    white-space: nowrap;
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.btn-primary {
    background-color: var(--hcss-teal);
    color: var(--hcss-white);
    border-color: var(--hcss-teal);
}

.btn-primary:hover:not(:disabled) {
    background-color: var(--hcss-teal-dark);
    border-color: var(--hcss-teal-dark);
}

.btn-secondary {
    background-color: var(--hcss-white);
    color: var(--hcss-gray-700);
    border-color: var(--hcss-gray-300);
}

.btn-secondary:hover:not(:disabled) {
    background-color: var(--hcss-gray-50);
    border-color: var(--hcss-gray-400);
}

.btn-danger {
    background-color: var(--hcss-error);
    color: var(--hcss-white);
    border-color: var(--hcss-error);
}

.btn-danger:hover:not(:disabled) {
    background-color: var(--hcss-red);
}

.btn-sm {
    padding: 0.375rem 0.75rem;
    font-size: 0.8125rem;
}

.btn-lg {
    padding: 0.75rem 1.5rem;
    font-size: 1rem;
}

.btn-icon {
    padding: 0.5rem;
    border-radius: var(--border-radius);
}

/* --- Cards --- */
.card {
    background: var(--hcss-white);
    border: 1px solid var(--hcss-gray-200);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.card:hover {
    box-shadow: var(--shadow-md);
}

.card-body {
    padding: 1.5rem;
}

.card-header {
    padding: 1rem 1.5rem;
    border-bottom: 1px solid var(--hcss-gray-200);
    font-weight: 600;
}

/* --- Form Elements --- */
.form-group {
    margin-bottom: 1.25rem;
}

.form-label {
    display: block;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--hcss-gray-700);
    margin-bottom: 0.375rem;
}

.form-input,
.form-select,
.form-textarea {
    display: block;
    width: 100%;
    padding: 0.625rem 0.875rem;
    font-family: var(--font-family);
    font-size: 0.9375rem;
    color: var(--hcss-gray-800);
    background-color: var(--hcss-white);
    border: 1px solid var(--hcss-gray-300);
    border-radius: var(--border-radius);
    transition: var(--transition);
    outline: none;
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
    border-color: var(--hcss-teal);
    box-shadow: 0 0 0 3px rgba(0, 139, 139, 0.15);
}

.form-input::placeholder,
.form-textarea::placeholder {
    color: var(--hcss-gray-400);
}

.form-input.error,
.form-select.error,
.form-textarea.error {
    border-color: var(--hcss-error);
    box-shadow: 0 0 0 3px rgba(220, 38, 38, 0.1);
}

.form-textarea {
    resize: vertical;
    min-height: 100px;
}

.form-select {
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%2364748B' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 0.75rem center;
    padding-right: 2.5rem;
}

/* Radio & Checkbox */
.form-check {
    display: flex;
    align-items: flex-start;
    gap: 0.5rem;
    padding: 0.5rem 0;
}

.form-check input[type="radio"],
.form-check input[type="checkbox"] {
    width: 1.125rem;
    height: 1.125rem;
    margin-top: 0.125rem;
    accent-color: var(--hcss-teal);
    cursor: pointer;
}

.form-check label {
    font-size: 0.9375rem;
    color: var(--hcss-gray-700);
    cursor: pointer;
}

.form-error {
    font-size: 0.8125rem;
    color: var(--hcss-error);
    margin-top: 0.25rem;
}

.required-marker {
    color: var(--hcss-error);
    font-weight: 500;
}

/* --- Badges --- */
.badge {
    display: inline-flex;
    align-items: center;
    padding: 0.125rem 0.625rem;
    font-size: 0.75rem;
    font-weight: 500;
    border-radius: 9999px;
    text-transform: capitalize;
}

.badge-active {
    background-color: var(--hcss-success-light);
    color: var(--hcss-success);
}

.badge-draft {
    background-color: var(--hcss-warning-light);
    color: var(--hcss-warning);
}

.badge-archived {
    background-color: var(--hcss-gray-100);
    color: var(--hcss-gray-500);
}

/* --- Utilities --- */
.container {
    max-width: 720px;
    margin: 0 auto;
    padding: 0 1rem;
}

.container-wide {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

.text-center { text-align: center; }
.text-muted { color: var(--hcss-gray-500); }
.text-sm { font-size: 0.875rem; }
.text-xs { font-size: 0.75rem; }

.mt-1 { margin-top: 0.25rem; }
.mt-2 { margin-top: 0.5rem; }
.mt-3 { margin-top: 1rem; }
.mt-4 { margin-top: 1.5rem; }
.mb-2 { margin-bottom: 0.5rem; }
.mb-3 { margin-bottom: 1rem; }
.mb-4 { margin-bottom: 1.5rem; }

.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.gap-2 { gap: 0.5rem; }
.gap-3 { gap: 0.75rem; }
.gap-4 { gap: 1rem; }

.hidden { display: none !important; }

/* --- Loading Spinner --- */
.spinner {
    width: 2rem;
    height: 2rem;
    border: 3px solid var(--hcss-gray-200);
    border-top-color: var(--hcss-teal);
    border-radius: 50%;
    animation: spin 0.6s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.loading-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 3rem;
    gap: 1rem;
    color: var(--hcss-gray-500);
}

/* --- Toast / Alerts --- */
.alert {
    padding: 0.875rem 1rem;
    border-radius: var(--border-radius);
    font-size: 0.875rem;
    margin-bottom: 1rem;
}

.alert-error {
    background-color: var(--hcss-error-light);
    color: var(--hcss-error);
    border: 1px solid rgba(220, 38, 38, 0.2);
}

.alert-success {
    background-color: var(--hcss-success-light);
    color: var(--hcss-success);
    border: 1px solid rgba(22, 163, 74, 0.2);
}

/* --- Tables --- */
.table-container {
    overflow-x: auto;
    border: 1px solid var(--hcss-gray-200);
    border-radius: var(--border-radius-lg);
}

table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.875rem;
}

thead {
    background-color: var(--hcss-gray-50);
}

th {
    padding: 0.75rem 1rem;
    text-align: left;
    font-weight: 600;
    color: var(--hcss-gray-600);
    border-bottom: 1px solid var(--hcss-gray-200);
    white-space: nowrap;
}

td {
    padding: 0.75rem 1rem;
    border-bottom: 1px solid var(--hcss-gray-100);
    color: var(--hcss-gray-700);
}

tr:last-child td {
    border-bottom: none;
}

tr:hover td {
    background-color: var(--hcss-gray-50);
}

/* --- Empty State --- */
.empty-state {
    text-align: center;
    padding: 3rem 1.5rem;
    color: var(--hcss-gray-500);
}

.empty-state svg {
    width: 4rem;
    height: 4rem;
    margin-bottom: 1rem;
    color: var(--hcss-gray-300);
}

.empty-state h3 {
    color: var(--hcss-gray-700);
    margin-bottom: 0.5rem;
}

/* --- Responsive --- */
@media (max-width: 768px) {
    h1 { font-size: 1.5rem; }
    h2 { font-size: 1.25rem; }

    .btn { padding: 0.5rem 1rem; }
    .btn-lg { padding: 0.625rem 1.25rem; }

    .card-body { padding: 1rem; }
}