/* ============================================
   GLOBAL IMPROVEMENTS - Cải tiến toàn cục
   Tăng tính nhất quán và đẹp mắt cho toàn bộ hệ thống
   ============================================ */

/* Smooth scrolling cho toàn bộ trang */
html {
    scroll-behavior: smooth;
}

/* ============================================
   FIX: Browser autofill (autocomplete) turns
   input background white, hiding the text.
   Use a very long transition to "lock" the
   browser-set background and keep the text
   colour readable at all times.
   ============================================ */
input:-webkit-autofill,
input:-webkit-autofill:hover,
input:-webkit-autofill:focus,
input:-webkit-autofill:active,
textarea:-webkit-autofill,
textarea:-webkit-autofill:hover,
textarea:-webkit-autofill:focus,
select:-webkit-autofill,
select:-webkit-autofill:hover,
select:-webkit-autofill:focus {
    -webkit-text-fill-color: #1e293b !important;
    -webkit-box-shadow: 0 0 0 1000px #fff9f9 inset !important;
    box-shadow: 0 0 0 1000px #fff9f9 inset !important;
    transition: background-color 99999s ease-in-out 0s;
    caret-color: #d2302c;
}

/* Ensure all form-control inputs/selects always show dark text */
.form-control,
.form-control:hover,
.form-control:focus,
.form-control:not(:placeholder-shown) {
    color: #1e293b !important;
    background-color: #ffffff;
}

/* =====================================================
   Placeholder text - always visible, never dimmed
   Use a mid-dark gray so the hint is readable on all
   background colours used in the project.
   ===================================================== */
input::placeholder,
textarea::placeholder,
.form-control::placeholder,
.custom-search-input::placeholder,
[class*="form-control"]::placeholder {
    color: #64748b !important;
    /* Prevent autofill -webkit-text-fill-color from bleeding
       into the placeholder pseudo-element */
    -webkit-text-fill-color: #64748b !important;
    opacity: 1 !important;
    font-style: normal;
}

/* Firefox uses :-moz-placeholder */
input::-moz-placeholder,
textarea::-moz-placeholder,
.form-control::-moz-placeholder {
    color: #64748b !important;
    opacity: 1 !important;
}

/* =====================================================
   FIX: select text dim/faded khi không focus
   Browsers (Chrome/Safari) apply system opacity or
   a lighter color to the native select in blur state.
   Force full opacity + dark text at every state.
   ===================================================== */
select,
select.form-control,
select.custom-select,
select.custom-select-filter {
    color: #1e293b !important;
    background-color: #ffffff !important;
    opacity: 1 !important;
    /* Prevents Safari/Chrome from fading text when blurred */
    -webkit-text-fill-color: #1e293b !important;
    /* Keeps the text fill locked even after OS-level rendering */
    -webkit-opacity: 1 !important;
}

select:hover,
select:focus,
select:active,
select:not(:focus),
select.form-control:hover,
select.form-control:focus,
select.form-control:active,
select.form-control:not(:focus),
select.custom-select:hover,
select.custom-select:focus,
select.custom-select:active,
select.custom-select-filter:hover,
select.custom-select-filter:focus,
select.custom-select-filter:not(:focus) {
    color: #1e293b !important;
    -webkit-text-fill-color: #1e293b !important;
    opacity: 1 !important;
    background-color: #ffffff !important;
}

/* Options inside the dropdown */
select option,
select.form-control option,
select.custom-select option {
    color: #1e293b !important;
    background-color: #ffffff;
    opacity: 1;
}

/* Placeholder option (value rỗng) - still show hint text */
select option[value=""],
select.form-control option[value=""] {
    color: #94a3b8 !important;
}

/* Cải thiện button focus state */
.btn:focus,
button:focus,
input:focus,
select:focus,
textarea:focus {
    outline: 2px solid #ffd700;
    outline-offset: 2px;
    box-shadow: 0 0 0 4px rgba(255, 215, 0, 0.2);
}

/* Card shadows nhất quán */
.card,
.feature-card,
.stat-card,
.spec-card {
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.card:hover,
.feature-card:hover,
.stat-card:hover,
.spec-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 12px 28px rgba(210, 48, 44, 0.15);
}

/* Loading animation nhất quán */
.loading-spinner {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid rgba(210, 48, 44, 0.3);
    border-radius: 50%;
    border-top-color: #d2302c;
    animation: spinner 0.8s ease-in-out infinite;
}

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

/* Form validation states */
.form-control.is-valid {
    border-color: #10b981;
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 8 8'%3e%3cpath fill='%2310b981' d='M2.3 6.73L.6 4.53c-.4-1.04.46-1.4 1.1-.8l1.1 1.4 3.4-3.8c.6-.63 1.6-.27 1.2.7l-4 4.6c-.43.5-.8.4-1.1.1z'/%3e%3c/svg%3e");
    background-repeat: no-repeat;
    background-position: right calc(0.375em + 0.1875rem) center;
    background-size: calc(0.75em + 0.375rem) calc(0.75em + 0.375rem);
}

.form-control.is-invalid {
    border-color: #ef4444;
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='none' stroke='%23ef4444' viewBox='0 0 12 12'%3e%3ccircle cx='6' cy='6' r='4.5'/%3e%3cpath stroke-linejoin='round' d='M5.8 3.6h.4L6 6.5z'/%3e%3ccircle cx='6' cy='8.2' r='.6' fill='%23ef4444' stroke='none'/%3e%3c/svg%3e");
    background-repeat: no-repeat;
    background-position: right calc(0.375em + 0.1875rem) center;
    background-size: calc(0.75em + 0.375rem) calc(0.75em + 0.375rem);
}

/* Toast/Alert improvements */
.alert {
    border-radius: 12px;
    border-left: 4px solid;
    padding: 1rem 1.25rem;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.alert-success {
    background-color: #d1fae5;
    border-color: #10b981;
    color: #065f46;
}

.alert-danger {
    background-color: #fee2e2;
    border-color: #ef4444;
    color: #991b1b;
}

.alert-warning {
    background-color: #fef3c7;
    border-color: #f59e0b;
    color: #92400e;
}

.alert-info {
    background-color: #dbeafe;
    border-color: #3b82f6;
    color: #1e40af;
}

/* Table improvements */
.table {
    border-collapse: separate;
    border-spacing: 0;
}

.table thead th {
    background: linear-gradient(135deg, #ff6b6b 0%, #d2302c 100%);
    color: white;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    padding: 1rem;
    border: none;
    position: sticky;
    top: 0;
    z-index: 10;
}

.table tbody tr {
    transition: all 0.2s ease;
}

.table tbody tr:hover {
    background-color: rgba(255, 215, 0, 0.1);
    transform: scale(1.01);
}

.table tbody td {
    padding: 0.875rem 1rem;
    vertical-align: middle;
    border-bottom: 1px solid rgba(210, 48, 44, 0.1);
}

/* Badge improvements */
.badge {
    padding: 0.4rem 0.8rem;
    border-radius: 8px;
    font-weight: 600;
    font-size: 0.8rem;
    letter-spacing: 0.3px;
}

.badge-success {
    background: linear-gradient(135deg, #10b981, #059669);
    box-shadow: 0 2px 8px rgba(16, 185, 129, 0.3);
}

.badge-danger {
    background: linear-gradient(135deg, #ef4444, #dc2626);
    box-shadow: 0 2px 8px rgba(239, 68, 68, 0.3);
}

.badge-warning {
    background: linear-gradient(135deg, #f59e0b, #d97706);
    box-shadow: 0 2px 8px rgba(245, 158, 11, 0.3);
}

.badge-info {
    background: linear-gradient(135deg, #3b82f6, #2563eb);
    box-shadow: 0 2px 8px rgba(59, 130, 246, 0.3);
}

/* Modal improvements */
.modal-content {
    border-radius: 16px;
    border: none;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    overflow: hidden;
}

.modal-header {
    background: linear-gradient(135deg, #ff6b6b 0%, #d2302c 100%);
    color: white;
    border-bottom: none;
    padding: 1.5rem;
}

.modal-header .close {
    color: white;
    opacity: 0.8;
    text-shadow: none;
}

.modal-header .close:hover {
    opacity: 1;
}

.modal-body {
    padding: 1.5rem;
}

.modal-footer {
    border-top: 1px solid rgba(210, 48, 44, 0.1);
    padding: 1rem 1.5rem;
}

/* Dropdown improvements */
.dropdown-menu {
    border-radius: 12px;
    border: none;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12);
    padding: 0.5rem;
    min-width: 200px;
}

.dropdown-item {
    border-radius: 8px;
    padding: 0.6rem 1rem;
    transition: all 0.2s ease;
    font-size: 0.9rem;
}

.dropdown-item:hover {
    background: linear-gradient(135deg, rgba(255, 215, 0, 0.2), rgba(212, 175, 55, 0.2));
    color: #8b0000;
    transform: translateX(4px);
}

.dropdown-divider {
    margin: 0.5rem 0;
    border-color: rgba(210, 48, 44, 0.1);
}

/* Pagination improvements */
.pagination {
    gap: 0.5rem;
}

.page-link {
    border-radius: 8px;
    border: 2px solid rgba(210, 48, 44, 0.2);
    color: #d2302c;
    font-weight: 600;
    padding: 0.5rem 1rem;
    transition: all 0.3s ease;
}

.page-link:hover {
    background: linear-gradient(135deg, #ff6b6b 0%, #d2302c 100%);
    color: white;
    border-color: #d2302c;
    transform: translateY(-2px);
}

.page-item.active .page-link {
    background: linear-gradient(135deg, #d2302c 0%, #8b0000 100%);
    border-color: #8b0000;
    box-shadow: 0 4px 12px rgba(210, 48, 44, 0.3);
}

/* Tooltip improvements */
.tooltip-inner {
    background-color: #1f2937;
    border-radius: 8px;
    padding: 0.5rem 0.75rem;
    font-size: 0.85rem;
    font-weight: 500;
}

.tooltip.bs-tooltip-top .arrow::before {
    border-top-color: #1f2937;
}

.tooltip.bs-tooltip-bottom .arrow::before {
    border-bottom-color: #1f2937;
}

/* Progress bar improvements */
.progress {
    height: 8px;
    border-radius: 50px;
    background-color: rgba(210, 48, 44, 0.1);
    overflow: hidden;
}

.progress-bar {
    background: linear-gradient(90deg, #d2302c 0%, #ff6b6b 50%, #ffd700 100%);
    background-size: 200% 100%;
    animation: progress-shimmer 2s ease-in-out infinite;
}

@keyframes progress-shimmer {
    0% { background-position: 100% 0; }
    100% { background-position: -100% 0; }
}

/* Scrollbar improvements */
::-webkit-scrollbar {
    width: 10px;
    height: 10px;
}

::-webkit-scrollbar-track {
    background: rgba(210, 48, 44, 0.05);
    border-radius: 10px;
}

::-webkit-scrollbar-thumb {
    background: linear-gradient(135deg, #ff6b6b, #d2302c);
    border-radius: 10px;
    border: 2px solid rgba(255, 255, 255, 0.5);
}

::-webkit-scrollbar-thumb:hover {
    background: linear-gradient(135deg, #d2302c, #8b0000);
}

/* Selection color */
::selection {
    background-color: rgba(255, 215, 0, 0.3);
    color: #8b0000;
}

::-moz-selection {
    background-color: rgba(255, 215, 0, 0.3);
    color: #8b0000;
}

/* Print styles */
@media print {
    body {
        background: white;
    }
    
    .no-print,
    .navbar,
    .sidebar,
    .footer,
    .medical-lantern-container,
    .tet_bottom {
        display: none !important;
    }
    
    .card,
    .table {
        break-inside: avoid;
    }
}

/* Accessibility improvements */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}

/* Skip to content link */
.skip-to-content {
    position: absolute;
    top: -40px;
    left: 0;
    background: #d2302c;
    color: white;
    padding: 8px 16px;
    text-decoration: none;
    border-radius: 0 0 8px 0;
    z-index: 100;
}

.skip-to-content:focus {
    top: 0;
}

/* Reduced motion for accessibility */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}

/* Dark text on light backgrounds for better readability */
.text-contrast {
    color: #1f2937;
    font-weight: 500;
}

/* Focus visible for keyboard navigation */
a:focus-visible,
button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible {
    outline: 3px solid #ffd700;
    outline-offset: 2px;
}

/* Empty state illustrations */
.empty-state {
    text-align: center;
    padding: 3rem 1rem;
    color: #6b7280;
}

.empty-state i {
    font-size: 4rem;
    color: rgba(210, 48, 44, 0.3);
    margin-bottom: 1rem;
}

.empty-state h3 {
    color: #374151;
    margin-bottom: 0.5rem;
}

.empty-state p {
    color: #9ca3af;
}