/* ==================== GLOBAL STYLES ==================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #3b82f6;
    --secondary-color: #6b7280;
    --success-color: #10b981;
    --danger-color: #ef4444;
    --warning-color: #f59e0b;
    --dark: #1f2937;
    --light: #f3f4f6;
    --white: #ffffff;
    --border-radius: 8px;
    --box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: var(--light);
    color: var(--dark);
    line-height: 1.6;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 20px;
}

/* ==================== NAVIGATION ==================== */
.navbar {
    background-color: var(--white);
    box-shadow: var(--box-shadow);
    padding: 1rem 0;
    position: sticky;
    top: 0;
    z-index: 1000;
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-brand h1 {
    font-size: 1.5rem;
    color: var(--primary-color);
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-menu a {
    text-decoration: none;
    color: var(--dark);
    font-weight: 500;
    transition: color 0.3s;
}

.nav-menu a:hover,
.nav-menu a.active {
    color: var(--primary-color);
}

/* ==================== MAIN CONTENT ==================== */
.main-content {
    min-height: calc(100vh - 140px);
    padding: 2rem 0;
}

/* ==================== STATS CARDS ==================== */
.stats-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.stat-card {
    background: var(--white);
    padding: 1.5rem;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    display: flex;
    align-items: center;
    gap: 1rem;
}

.stat-icon {
    font-size: 2.5rem;
}

.stat-info h3 {
    font-size: 2rem;
    color: var(--primary-color);
}

.stat-info p {
    color: var(--secondary-color);
}

/* ==================== DASHBOARD GRID ==================== */
.dashboard-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
}

.panel {
    background: var(--white);
    padding: 1.5rem;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
}

.panel h2 {
    margin-bottom: 1.5rem;
    color: var(--dark);
    border-bottom: 2px solid var(--light);
    padding-bottom: 0.5rem;
}

/* ==================== UPLOAD AREA ==================== */
.upload-area {
    border: 2px dashed var(--secondary-color);
    border-radius: var(--border-radius);
    padding: 2rem;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s;
    min-height: 400px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.upload-area:hover {
    border-color: var(--primary-color);
    background-color: #f0f9ff;
}

.upload-placeholder {
    width: 100%;
}

.upload-icon {
    font-size: 4rem;
    margin-bottom: 1rem;
}

.upload-hint {
    font-size: 0.9rem;
    color: var(--secondary-color);
}

#previewImage {
    max-height: 400px;
    object-fit: contain;
}

/* ==================== BUTTONS ==================== */
.button-group {
    display: flex;
    gap: 1rem;
    margin-top: 1rem;
}

.btn {
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: var(--border-radius);
    cursor: pointer;
    font-size: 1rem;
    font-weight: 500;
    transition: all 0.3s;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

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

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

.btn-primary:hover:not(:disabled) {
    background-color: #2563eb;
}

.btn-success {
    background-color: var(--success-color);
    color: var(--white);
}

.btn-success:hover:not(:disabled) {
    background-color: #059669;
}

.btn-secondary {
    background-color: var(--secondary-color);
    color: var(--white);
}

.btn-secondary:hover:not(:disabled) {
    background-color: #4b5563;
}

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

.btn-danger:hover:not(:disabled) {
    background-color: #dc2626;
}

.btn-sm {
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
}

.btn-block {
    width: 100%;
    justify-content: center;
}

/* ==================== LOADING SPINNER ==================== */
.loading {
    text-align: center;
    padding: 2rem;
}

.spinner {
    border: 4px solid var(--light);
    border-top: 4px solid var(--primary-color);
    border-radius: 50%;
    width: 50px;
    height: 50px;
    animation: spin 1s linear infinite;
    margin: 0 auto 1rem;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* ==================== RESULTS CONTAINER ==================== */
.results-container {
    min-height: 200px;
}

.no-results {
    text-align: center;
    padding: 3rem 1rem;
    color: var(--secondary-color);
}

.detection-result {
    background-color: var(--light);
    padding: 1rem;
    border-radius: var(--border-radius);
    margin-bottom: 1rem;
}

.detection-result h4 {
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.result-item {
    display: flex;
    justify-content: space-between;
    padding: 0.5rem 0;
    border-bottom: 1px solid #e5e7eb;
}

.result-item:last-child {
    border-bottom: none;
}

.result-label {
    font-weight: 600;
    color: var(--dark);
}

.result-value {
    color: var(--secondary-color);
}

.badge {
    padding: 0.25rem 0.75rem;
    border-radius: 12px;
    font-size: 0.875rem;
    font-weight: 600;
}

.badge-success {
    background-color: #d1fae5;
    color: var(--success-color);
}

.badge-warning {
    background-color: #fef3c7;
    color: var(--warning-color);
}

.badge-danger {
    background-color: #fee;
    color: var(--danger-color);
}

/* ==================== FORMS ==================== */
.registration-form {
    background-color: var(--light);
    padding: 1.5rem;
    border-radius: var(--border-radius);
    margin-top: 1.5rem;
}

.registration-form h3 {
    margin-bottom: 1rem;
    color: var(--dark);
}

.form-group {
    margin-bottom: 1rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: var(--dark);
}

.form-group input,
.form-group select {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid #d1d5db;
    border-radius: var(--border-radius);
    font-size: 1rem;
}

.form-group input:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--primary-color);
}

/* ==================== TABLES ==================== */
.table-container {
    overflow-x: auto;
    background: var(--white);
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
}

table {
    width: 100%;
    border-collapse: collapse;
}

thead {
    background-color: var(--primary-color);
    color: var(--white);
}

thead th {
    padding: 1rem;
    text-align: left;
    font-weight: 600;
}

tbody tr {
    border-bottom: 1px solid var(--light);
    transition: background-color 0.2s;
}

tbody tr:hover {
    background-color: #f9fafb;
}

tbody td {
    padding: 1rem;
}

/* ==================== REGISTRY ==================== */
.registry-header,
.detections-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
}

.header-actions {
    display: flex;
    gap: 1rem;
    align-items: center;
}

.search-input {
    padding: 0.75rem 1rem;
    border: 1px solid #d1d5db;
    border-radius: var(--border-radius);
    font-size: 1rem;
    min-width: 300px;
}

.registry-footer,
.detections-footer {
    margin-top: 1rem;
    text-align: center;
    color: var(--secondary-color);
}

/* ==================== MODAL ==================== */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 2000;
    align-items: center;
    justify-content: center;
}

.modal.active {
    display: flex;
}

.modal-content {
    background: var(--white);
    padding: 2rem;
    border-radius: var(--border-radius);
    max-width: 500px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
}

.modal-close {
    background: none;
    border: none;
    font-size: 2rem;
    cursor: pointer;
    color: var(--secondary-color);
}

.modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: 1rem;
    margin-top: 1.5rem;
}

/* ==================== CONFIDENCE BAR ==================== */
.confidence-bar {
    position: relative;
    width: 150px;
    height: 25px;
    background-color: var(--light);
    border-radius: 12px;
    overflow: hidden;
}

.confidence-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--danger-color), var(--warning-color), var(--success-color));
    transition: width 0.3s;
}

.confidence-text {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-weight: 600;
    font-size: 0.875rem;
    color: var(--dark);
}

/* ==================== TOAST NOTIFICATION ==================== */
.toast {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    padding: 1rem 1.5rem;
    background-color: var(--dark);
    color: var(--white);
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    opacity: 0;
    transform: translateY(100px);
    transition: all 0.3s;
    z-index: 3000;
}

.toast.show {
    opacity: 1;
    transform: translateY(0);
}

.toast.success {
    background-color: var(--success-color);
}

.toast.error {
    background-color: var(--danger-color);
}

/* ==================== ERROR PAGE ==================== */
.error-page {
    text-align: center;
    padding: 4rem 2rem;
}

.error-page h1 {
    font-size: 6rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.error-page h2 {
    font-size: 2rem;
    margin-bottom: 1rem;
}

.error-page p {
    color: var(--secondary-color);
    margin-bottom: 2rem;
}

/* ==================== FOOTER ==================== */
.footer {
    background-color: var(--dark);
    color: var(--white);
    text-align: center;
    padding: 1.5rem 0;
    margin-top: 3rem;
}

/* ==================== RESPONSIVE ==================== */
@media (max-width: 768px) {
    .dashboard-grid {
        grid-template-columns: 1fr;
    }

    .nav-menu {
        flex-direction: column;
        gap: 0.5rem;
    }

    .stats-container {
        grid-template-columns: 1fr;
    }

    .header-actions {
        flex-direction: column;
        width: 100%;
    }

    .search-input {
        width: 100%;
    }

    .button-group {
        flex-direction: column;
    }

    .btn {
        width: 100%;
    }
}