:root {
    --primary: #2563eb;
    --primary-dark: #1d4ed8;
    --primary-light: #dbeafe;
    --secondary: #64748b;
    --success: #16a34a;
    --success-light: #dcfce7;
    --warning: #f59e0b;
    --warning-light: #fef3c7;
    --danger: #dc2626;
    --danger-light: #fee2e2;
    --bg: #f1f5f9;
    --card-bg: #ffffff;
    --text: #1e293b;
    --text-secondary: #64748b;
    --border: #e2e8f0;
    --shadow: 0 1px 3px rgba(0,0,0,0.1), 0 1px 2px rgba(0,0,0,0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.1), 0 4px 6px -2px rgba(0,0,0,0.05);
    --radius: 12px;
    --radius-sm: 8px;
}

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

body {
    font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.header {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: white;
    padding: 1rem 2rem;
    box-shadow: var(--shadow-lg);
}

.header-content {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

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

.logo-icon {
    background: rgba(255,255,255,0.2);
    padding: 0.5rem 0.75rem;
    border-radius: var(--radius-sm);
    font-weight: 800;
    font-size: 1.1rem;
    letter-spacing: 1px;
}

.logo h1 {
    font-size: 1.5rem;
    font-weight: 700;
}

.lang-toggle {
    display: flex;
    align-items: center;
    background: rgba(255,255,255,0.15);
    border-radius: var(--radius-sm);
    padding: 0.25rem;
    cursor: pointer;
    border: none;
    color: white;
    font-size: 0.9rem;
    gap: 0.25rem;
}

.lang-option {
    padding: 0.4rem 0.8rem;
    border-radius: 6px;
    transition: all 0.2s;
    font-weight: 600;
}

.lang-option.active {
    background: white;
    color: var(--primary);
}

.lang-divider {
    opacity: 0.5;
}

.nav {
    display: flex;
    background: var(--card-bg);
    border-bottom: 1px solid var(--border);
    overflow-x: auto;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: var(--shadow);
}

.nav-tab {
    flex: 1;
    min-width: 120px;
    padding: 1rem 1.5rem;
    border: none;
    background: none;
    color: var(--text-secondary);
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    border-bottom: 3px solid transparent;
    white-space: nowrap;
}

.nav-tab:hover {
    color: var(--primary);
    background: var(--primary-light);
}

.nav-tab.active {
    color: var(--primary);
    border-bottom-color: var(--primary);
    background: var(--primary-light);
}

.main {
    flex: 1;
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
    width: 100%;
}

.tab-content {
    display: none;
    animation: fadeIn 0.3s ease;
}

.tab-content.active {
    display: block;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.card {
    background: var(--card-bg);
    border-radius: var(--radius);
    padding: 2rem;
    margin-bottom: 1.5rem;
    box-shadow: var(--shadow);
    border: 1px solid var(--border);
}

.card h2 {
    font-size: 1.4rem;
    margin-bottom: 0.5rem;
    color: var(--text);
}

.card-desc {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
}

.form-group {
    margin-bottom: 1.25rem;
}

.form-group label {
    display: block;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--text);
}

.form-group input[type="text"],
.form-group input[type="number"] {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 2px solid var(--border);
    border-radius: var(--radius-sm);
    font-size: 1rem;
    transition: border-color 0.2s;
}

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

.form-group small {
    color: var(--text-secondary);
    font-size: 0.85rem;
}

.form-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
}

.btn {
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: var(--radius-sm);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
}

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

.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-1px);
    box-shadow: var(--shadow-lg);
}

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

.btn-secondary:hover {
    background: #475569;
}

.nav-buttons {
    display: flex;
    gap: 1rem;
    margin-top: 1.5rem;
}

.names-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 1rem;
}

.name-input-group {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.name-input-group .number-badge {
    background: var(--primary);
    color: white;
    width: 32px;
    height: 32px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 0.9rem;
    flex-shrink: 0;
}

.name-input-group input {
    flex: 1;
}

.comparison-section {
    margin-top: 1.5rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--border);
}

.comparison-section h3 {
    margin-bottom: 1rem;
    color: var(--primary);
    font-size: 1.1rem;
}

.comparison-pair {
    background: var(--bg);
    border-radius: var(--radius-sm);
    padding: 1.25rem;
    margin-bottom: 1rem;
}

.comparison-pair-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1rem;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.comparison-labels {
    display: flex;
    align-items: center;
    gap: 1rem;
    flex-wrap: wrap;
}

.comparison-labels .label {
    font-weight: 700;
    padding: 0.4rem 0.8rem;
    background: var(--primary-light);
    border-radius: 6px;
    color: var(--primary-dark);
}

.comparison-labels .vs {
    color: var(--text-secondary);
    font-weight: 600;
}

.scale-selector {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    flex-wrap: wrap;
    justify-content: center;
}

.scale-btn {
    width: 40px;
    height: 40px;
    border: 2px solid var(--border);
    background: var(--card-bg);
    border-radius: 8px;
    font-weight: 700;
    font-size: 0.95rem;
    cursor: pointer;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
}

.scale-btn:hover {
    border-color: var(--primary);
    background: var(--primary-light);
}

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

.scale-btn.scale-left {
    background: #dbeafe;
    border-color: #3b82f6;
}

.scale-btn.scale-left.active {
    background: #2563eb;
}

.scale-btn.scale-right {
    background: #fce7f3;
    border-color: #ec4899;
}

.scale-btn.scale-right.active {
    background: #ec4899;
}

.scale-labels {
    display: flex;
    justify-content: space-between;
    margin-top: 0.5rem;
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.comparison-value {
    text-align: center;
    margin-top: 0.5rem;
    padding: 0.5rem;
    background: var(--card-bg);
    border-radius: 6px;
    font-weight: 600;
    color: var(--primary);
}

.consistency-indicator {
    padding: 1rem;
    border-radius: var(--radius-sm);
    margin-top: 1rem;
    font-weight: 600;
}

.consistency-indicator.good {
    background: var(--success-light);
    color: var(--success);
    border: 1px solid var(--success);
}

.consistency-indicator.warning {
    background: var(--warning-light);
    color: #92400e;
    border: 1px solid var(--warning);
}

.consistency-indicator.bad {
    background: var(--danger-light);
    color: var(--danger);
    border: 1px solid var(--danger);
}

.empty-state {
    text-align: center;
    padding: 4rem 2rem;
}

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

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

.empty-state p {
    color: var(--text-secondary);
}

.result-section {
    margin-bottom: 2rem;
}

.result-section h3 {
    font-size: 1.2rem;
    margin-bottom: 1rem;
    color: var(--primary);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.result-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
}

.chart-container {
    background: var(--bg);
    border-radius: var(--radius-sm);
    padding: 1rem;
    min-height: 300px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.result-table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 1rem;
}

.result-table th,
.result-table td {
    padding: 0.75rem 1rem;
    text-align: left;
    border-bottom: 1px solid var(--border);
}

.result-table th {
    background: var(--primary-light);
    color: var(--primary-dark);
    font-weight: 700;
}

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

.result-table tr:hover {
    background: var(--bg);
}

.winner-badge {
    background: var(--success);
    color: white;
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 700;
}

.bar-visual {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 0.75rem;
}

.bar-label {
    min-width: 120px;
    font-weight: 600;
    text-align: right;
}

.bar-track {
    flex: 1;
    height: 28px;
    background: var(--bg);
    border-radius: 14px;
    overflow: hidden;
}

.bar-fill {
    height: 100%;
    border-radius: 14px;
    transition: width 0.5s ease;
    display: flex;
    align-items: center;
    justify-content: flex-end;
    padding-right: 0.75rem;
    color: white;
    font-weight: 700;
    font-size: 0.85rem;
    min-width: 50px;
}

.bar-value {
    min-width: 60px;
    font-weight: 700;
    color: var(--primary);
}

.manual-content {
    max-width: 900px;
    margin: 0 auto;
}

.manual-card {
    margin-bottom: 2rem;
}

.scale-table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 1rem;
}

.scale-table th,
.scale-table td {
    padding: 0.75rem 1rem;
    text-align: left;
    border: 1px solid var(--border);
}

.scale-table th {
    background: var(--primary);
    color: white;
}

.scale-table tr:nth-child(even) {
    background: var(--bg);
}

.scale-table .value-cell {
    font-weight: 800;
    font-size: 1.2rem;
    text-align: center;
    color: var(--primary);
}

.steps {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.step {
    display: flex;
    gap: 1.25rem;
    align-items: flex-start;
}

.step-number {
    background: var(--primary);
    color: white;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    font-size: 1.1rem;
    flex-shrink: 0;
}

.step-content h3 {
    margin-bottom: 0.5rem;
    color: var(--text);
}

.step-content p {
    color: var(--text-secondary);
}

.ri-table {
    margin-top: 1rem;
    border-collapse: collapse;
    text-align: center;
}

.ri-table th,
.ri-table td {
    padding: 0.5rem 0.75rem;
    border: 1px solid var(--border);
}

.ri-table th {
    background: var(--primary-light);
    color: var(--primary-dark);
}

.footer {
    text-align: center;
    padding: 1.5rem;
    background: var(--card-bg);
    border-top: 1px solid var(--border);
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.criteria-matrix-preview {
    margin-top: 1rem;
    overflow-x: auto;
}

.matrix-table {
    width: 100%;
    border-collapse: collapse;
    min-width: 300px;
}

.matrix-table th,
.matrix-table td {
    padding: 0.5rem;
    text-align: center;
    border: 1px solid var(--border);
    font-size: 0.9rem;
}

.matrix-table th {
    background: var(--primary-light);
    color: var(--primary-dark);
}

.matrix-table td.diagonal {
    background: #f0f0f0;
    font-weight: 700;
}

.matrix-table td.highlight {
    background: var(--primary-light);
    font-weight: 600;
}

.comparison-group {
    margin-bottom: 2rem;
    padding: 1.5rem;
    background: var(--bg);
    border-radius: var(--radius);
    border: 1px solid var(--border);
}

.comparison-group h3 {
    margin-bottom: 1rem;
    color: var(--text);
    font-size: 1.1rem;
}

.comparison-group h3 span {
    color: var(--primary);
}

.hidden {
    display: none !important;
}

@media (max-width: 768px) {
    .header-content {
        flex-direction: column;
        text-align: center;
    }
    
    .logo {
        flex-direction: column;
    }
    
    .main {
        padding: 1rem;
    }
    
    .card {
        padding: 1.25rem;
    }
    
    .nav-tab {
        min-width: 100px;
        padding: 0.75rem 1rem;
        font-size: 0.85rem;
    }
    
    .comparison-labels {
        flex-direction: column;
        gap: 0.5rem;
    }
    
    .scale-btn {
        width: 36px;
        height: 36px;
    }
    
    .result-grid {
        grid-template-columns: 1fr;
    }
    
    .bar-label {
        min-width: 80px;
        font-size: 0.85rem;
    }
}