/**
 * Ring Size Converter CSS - CalcTechLab
 * Enhanced UI with natural integration
 */

/* ========================================
   MAIN CONTAINER
   ======================================== */

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

/* ========================================
   HERO INTRODUCTION
   ======================================== */

.converter-intro {
    text-align: center;
    padding: var(--spacing-2xl) var(--spacing-xl);
    background: linear-gradient(135deg, var(--primary-100) 0%, var(--primary-50) 100%);
    border-radius: var(--radius-xl);
    margin-bottom: var(--spacing-xl);
    border: 2px solid var(--primary-200);
}

.intro-title {
    font-size: 2.25rem;
    font-weight: 800;
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
    background: linear-gradient(135deg, var(--brand-primary) 0%, var(--brand-secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.intro-subtitle {
    font-size: 1.125rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
    line-height: 1.6;
}

@media (max-width: 768px) {
    .intro-title {
        font-size: 1.75rem;
    }
    
    .intro-subtitle {
        font-size: 1rem;
    }
}

/* ========================================
   MAIN LAYOUT
   ======================================== */

.converter-layout {
    display: grid;
    grid-template-columns: 1fr 380px;
    gap: var(--spacing-xl);
    align-items: start;
}

@media (max-width: 1200px) {
    .converter-layout {
        grid-template-columns: 1fr;
    }
}

.converter-main {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xl);
}

.converter-sidebar {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
    position: sticky;
    top: var(--spacing-xl);
}

@media (max-width: 1200px) {
    .converter-sidebar {
        position: static;
    }
}

/* ========================================
   CARDS
   ======================================== */

.converter-card,
.results-card,
.visualization-card,
.actions-card {
    background: var(--bg-card);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--border-color);
    overflow: hidden;
    transition: all var(--transition-base);
}

.converter-card:hover,
.results-card:hover,
.visualization-card:hover,
.actions-card:hover {
    box-shadow: var(--shadow-xl);
    transform: translateY(-2px);
}

.card-header {
    background: linear-gradient(135deg, var(--brand-primary) 0%, var(--brand-secondary) 100%);
    padding: var(--spacing-lg) var(--spacing-xl);
    color: white;
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.results-header {
    background: linear-gradient(135deg, var(--brand-secondary) 0%, var(--brand-primary) 100%);
}

.header-icon {
    font-size: 2.5rem;
    line-height: 1;
}

.header-content h2,
.header-content h3 {
    font-size: 1.25rem;
    font-weight: 700;
    margin: 0 0 var(--spacing-xs) 0;
    color: white;
}

.header-content p {
    opacity: 0.95;
    font-size: 0.875rem;
    margin: 0;
    color: rgba(255, 255, 255, 0.9);
}

.card-body {
    padding: var(--spacing-xl);
}

/* ========================================
   INPUT SECTION
   ======================================== */

.input-section {
    margin-bottom: var(--spacing-lg);
}

.input-label {
    display: block;
    margin-bottom: var(--spacing-sm);
}

.label-text {
    display: block;
    font-weight: 700;
    color: var(--text-primary);
    font-size: 0.95rem;
    margin-bottom: var(--spacing-xs);
}

.label-hint {
    display: block;
    font-size: 0.85rem;
    color: var(--text-muted);
}

.styled-select,
.styled-input {
    width: 100%;
    padding: 1rem 1.25rem;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-lg);
    font-size: 1rem;
    transition: all var(--transition-base);
    background: var(--bg-input);
    color: var(--text-primary);
    appearance: none;
    cursor: pointer;
}

.styled-select {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='24' height='24' viewBox='0 0 24 24' fill='none' stroke='%23666' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 1rem center;
    background-size: 1.25rem;
    padding-right: 3rem;
}

.styled-select:focus,
.styled-input:focus {
    outline: none;
    border-color: var(--brand-primary);
    box-shadow: 0 0 0 4px var(--primary-100);
}

.styled-select:hover,
.styled-input:hover {
    border-color: var(--brand-secondary);
}

.input-wrapper {
    position: relative;
}

.input-icon {
    position: absolute;
    right: var(--spacing-md);
    top: 50%;
    transform: translateY(-50%);
    font-size: 1.25rem;
    pointer-events: none;
}

/* ========================================
   UNIT TOGGLE
   ======================================== */

.unit-toggle-section {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-md);
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    border: 2px solid var(--border-color);
}

.toggle-label {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.toggle-text {
    font-weight: 600;
    color: var(--text-primary);
    font-size: 0.9rem;
}

.unit-badge {
    display: inline-flex;
    align-items: center;
    padding: 0.25rem 0.75rem;
    background: var(--bg-card);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: 0.85rem;
    font-weight: 700;
    color: var(--text-secondary);
    transition: all var(--transition-base);
}

.unit-badge.active {
    background: var(--brand-primary);
    color: white;
    border-color: var(--brand-primary);
}

.toggle-switch-wrapper {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.toggle-switch {
    position: relative;
    display: inline-block;
    width: 56px;
    height: 30px;
    margin: 0;
}

.toggle-switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.toggle-slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: var(--border-color);
    transition: all var(--transition-base);
    border-radius: 30px;
}

.toggle-slider:before {
    position: absolute;
    content: "";
    height: 24px;
    width: 24px;
    left: 3px;
    bottom: 3px;
    background-color: white;
    transition: all var(--transition-base);
    border-radius: 50%;
    box-shadow: var(--shadow-sm);
}

.toggle-switch input:checked + .toggle-slider {
    background-color: var(--brand-primary);
}

.toggle-switch input:checked + .toggle-slider:before {
    transform: translateX(26px);
}

/* ========================================
   RESULTS SECTION
   ======================================== */

.results-section {
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    margin-top: var(--spacing-xl);
    border: 1px solid var(--border-color);
}

.results-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

@media (max-width: 768px) {
    .results-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 480px) {
    .results-grid {
        grid-template-columns: 1fr;
    }
}

.result-card {
    background: var(--bg-card);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    text-align: center;
    border: 2px solid var(--border-color);
    transition: all var(--transition-base);
}

.result-card:hover {
    border-color: var(--brand-primary);
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.result-card.highlighted {
    background: linear-gradient(135deg, var(--brand-primary) 0%, var(--brand-secondary) 100%);
    border-color: transparent;
}

.result-card.highlighted .result-icon,
.result-card.highlighted .result-label,
.result-card.highlighted .result-value {
    color: white;
}

.result-icon {
    font-size: 2rem;
    margin-bottom: var(--spacing-sm);
}

.result-label {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xs);
    font-weight: 600;
}

.result-value {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--brand-primary);
    line-height: 1.2;
}

.size-range-indicator {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
}

.range-label {
    font-weight: 600;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.range-value {
    font-weight: 700;
    color: var(--brand-primary);
    font-size: 1.1rem;
}

/* ========================================
   VISUALIZATION CARD
   ======================================== */

.visualization-card .card-header {
    background: linear-gradient(135deg, #9C27B0 0%, #E91E63 100%);
}

.visualization-card .card-body {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.visualization-tips {
    margin-top: var(--spacing-md);
    padding: var(--spacing-md);
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
    border-left: 4px solid var(--brand-primary);
}

.visualization-tips p {
    margin: 0;
    font-size: 0.85rem;
    color: var(--text-secondary);
    line-height: 1.5;
}

/* ========================================
   ACTIONS CARD
   ======================================== */

.actions-card .card-header {
    background: linear-gradient(135deg, #FF5722 0%, #FF9800 100%);
}

.action-btn {
    width: 100%;
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md) var(--spacing-lg);
    background: var(--bg-card);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all var(--transition-base);
    margin-bottom: var(--spacing-md);
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-primary);
}

.action-btn:hover {
    border-color: var(--brand-primary);
    background: var(--brand-primary);
    color: white;
    transform: translateX(4px);
    box-shadow: var(--shadow-md);
}

.action-btn:last-child {
    margin-bottom: 0;
}

.btn-icon {
    font-size: 1.5rem;
    line-height: 1;
}

.btn-text {
    flex: 1;
    text-align: left;
}

/* ========================================
   INPUT SECTION
   ======================================== */

.input-section {
    margin-bottom: var(--spacing-xl);
}

.input-group {
    margin-bottom: var(--spacing-lg);
}

.input-group label {
    display: block;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
    font-size: 0.95rem;
}

.input-group select,
.input-group input {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: 1rem;
    transition: all var(--transition-base);
    background: var(--bg-input);
    color: var(--text-primary);
}

.input-group select:focus,
.input-group input:focus {
    outline: none;
    border-color: var(--brand-primary);
    box-shadow: 0 0 0 3px var(--primary-100);
}

/* ========================================
   UNIT TOGGLE
   ======================================== */

.unit-toggle-container {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
}

.unit-toggle-container label {
    font-weight: 600;
    color: var(--text-primary);
    font-size: 0.9rem;
}

.unit-labels {
    display: flex;
    gap: var(--spacing-md);
}

.unit-labels span {
    font-size: 0.9rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.toggle-switch {
    position: relative;
    display: inline-block;
    width: 50px;
    height: 26px;
    margin: 0;
}

.toggle-switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.toggle-slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: var(--border-color);
    transition: var(--transition-base);
    border-radius: 26px;
}

.toggle-slider:before {
    position: absolute;
    content: "";
    height: 20px;
    width: 20px;
    left: 3px;
    bottom: 3px;
    background-color: white;
    transition: var(--transition-base);
    border-radius: 50%;
}

.toggle-switch input:checked + .toggle-slider {
    background-color: var(--brand-primary);
}

.toggle-switch input:checked + .toggle-slider:before {
    transform: translateX(24px);
}

/* ========================================
   BUTTONS
   ======================================== */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: var(--radius-md);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-base);
    text-decoration: none;
    gap: var(--spacing-sm);
}

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

.btn-primary:hover {
    background: var(--brand-secondary);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-secondary {
    background: var(--bg-secondary);
    color: var(--text-primary);
    border: 2px solid var(--border-color);
}

.btn-secondary:hover {
    background: var(--bg-card);
    border-color: var(--brand-primary);
    color: var(--brand-primary);
}

.btn-outline {
    background: transparent;
    color: var(--brand-primary);
    border: 2px solid var(--brand-primary);
}

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

/* ========================================
   RESULTS SECTION
   ======================================== */

.results-section {
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    margin-top: var(--spacing-xl);
    border: 1px solid var(--border-color);
}

.results-section h3 {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: var(--spacing-lg);
    color: var(--text-primary);
    text-align: center;
}

.results-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-md);
}

@media (max-width: 768px) {
    .results-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 480px) {
    .results-grid {
        grid-template-columns: 1fr;
    }
}

.result-item {
    background: var(--bg-card);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    text-align: center;
    border: 1px solid var(--border-color);
    transition: var(--transition-base);
}

.result-item:hover {
    border-color: var(--brand-primary);
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.result-label {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xs);
    font-weight: 500;
}

.result-value {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--brand-primary);
}

.result-value.highlighted {
    color: var(--brand-secondary);
    font-size: 1.5rem;
}

/* ========================================
   SIZE GUIDE CARD
   ======================================== */

.size-guide-card {
    background: var(--bg-card);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--border-color);
    overflow: hidden;
}

.size-guide-header {
    background: linear-gradient(135deg, var(--brand-primary) 0%, var(--brand-secondary) 100%);
    padding: var(--spacing-lg) var(--spacing-xl);
    color: white;
}

.size-guide-header h3 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    color: white;
}

.size-guide-header p {
    opacity: 0.95;
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.9);
}

.size-guide-body {
    padding: var(--spacing-xl);
}

.tab-container {
    display: flex;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-lg);
    overflow-x: auto;
    padding-bottom: var(--spacing-xs);
}

.tab-btn {
    flex: 1;
    min-width: 80px;
    padding: 0.5rem 1rem;
    background: var(--bg-secondary);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    cursor: pointer;
    font-weight: 600;
    font-size: 0.85rem;
    transition: all var(--transition-base);
    white-space: nowrap;
}

.tab-btn:hover {
    background: var(--bg-card);
    border-color: var(--brand-primary);
    color: var(--brand-primary);
}

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

/* ========================================
   SIZE CHART
   ======================================== */

.size-chart {
    display: none;
}

.size-chart.active {
    display: block;
}

.size-table {
    width: 100%;
    border-collapse: collapse;
    margin-top: var(--spacing-md);
}

.size-table th,
.size-table td {
    padding: 0.75rem;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
    font-size: 0.9rem;
}

.size-table th {
    background: var(--bg-secondary);
    font-weight: 700;
    color: var(--text-primary);
}

.size-table td {
    color: var(--text-secondary);
}

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

.size-table tr.selected {
    background: var(--primary-100);
    border-left: 3px solid var(--brand-primary);
}

/* ========================================
   PRINT GUIDE CARD
   ======================================== */

.print-guide-card {
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    margin-top: var(--spacing-lg);
    border: 1px solid var(--border-color);
}

.print-guide-card h4 {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.print-guide-card p {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-sm);
    font-size: 0.95rem;
    line-height: 1.6;
}

.print-guide-card ul {
    list-style: none;
    padding: 0;
    margin: var(--spacing-md) 0;
}

.print-guide-card ul li {
    padding: 0.5rem 0;
    color: var(--text-secondary);
    font-size: 0.9rem;
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-sm);
}

.print-guide-card ul li:before {
    content: "✓";
    color: var(--brand-primary);
    font-weight: bold;
}

/* ========================================
   MEASUREMENT TIPS
   ======================================== */

.tips-section {
    background: linear-gradient(135deg, var(--primary-100) 0%, var(--primary-50) 100%);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    margin-top: var(--spacing-lg);
    border: 1px solid var(--primary-200);
}

.tips-section h4 {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.tips-section .tip-item {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
    padding: var(--spacing-md);
    background: rgba(255, 255, 255, 0.6);
    border-radius: var(--radius-md);
}

.tips-section .tip-icon {
    flex-shrink: 0;
    width: 24px;
    height: 24px;
    background: var(--brand-primary);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    font-size: 0.85rem;
}

.tips-section .tip-content {
    flex: 1;
}

.tips-section .tip-content strong {
    display: block;
    margin-bottom: 0.25rem;
    color: var(--text-primary);
    font-weight: 600;
}

.tips-section .tip-content p {
    margin: 0;
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.5;
}

/* ========================================
   ACTIONS
   ======================================== */

.actions {
    display: flex;
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
    flex-wrap: wrap;
}

.actions .btn {
    flex: 1;
    min-width: 120px;
}

/* ========================================
   ALERT MESSAGES
   ======================================== */

.alert {
    padding: 1rem 1.5rem;
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-md);
    font-weight: 500;
    display: none;
}

.alert.show {
    display: block;
}

.alert-info {
    background: var(--primary-100);
    color: var(--brand-primary);
    border: 1px solid var(--primary-200);
}

.alert-warning {
    background: #fef3c7;
    color: #92400e;
    border: 1px solid #f59e0b;
}

.alert-error {
    background: #fee2e2;
    color: #991b1b;
    border: 1px solid #ef4444;
}

/* ========================================
   RESPONSIVE DESIGN
   ======================================== */

@media (max-width: 992px) {
    .converter-layout {
        grid-template-columns: 1fr;
    }
    
    .size-guide-card {
        margin-top: var(--spacing-lg);
    }
}

@media (max-width: 768px) {
    .converter-card-header {
        padding: var(--spacing-lg) var(--spacing-xl);
    }
    
    .converter-card-header h2 {
        font-size: 1.5rem;
    }
    
    .converter-card-body {
        padding: var(--spacing-lg);
    }
    
    .results-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .actions {
        flex-direction: column;
    }
    
    .actions .btn {
        width: 100%;
    }
}

@media (max-width: 480px) {
    .results-grid {
        grid-template-columns: 1fr;
    }
    
    .unit-toggle-container {
        flex-wrap: wrap;
    }
    
    .tab-container {
        gap: var(--spacing-xs);
    }
    
    .tab-btn {
        padding: 0.4rem 0.75rem;
        font-size: 0.8rem;
        min-width: 60px;
    }
}

/* ========================================
   PRINT STYLES
   ======================================== */

@media print {
    .converter-layout {
        display: block;
    }
    
    .size-guide-card {
        page-break-inside: avoid;
    }
    
    .btn,
    .unit-toggle-container {
        display: none;
    }
    
    .results-section {
        background: white;
        border: 1px solid #000;
    }
}

/* ========================================
   ANIMATIONS
   ======================================== */

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

.converter-card,
.size-guide-card {
    animation: fadeIn 0.5s ease-out;
}

/* ========================================
   FOCUS STATES
   ======================================== */

.btn:focus,
input:focus,
select:focus {
    outline: none;
    box-shadow: 0 0 0 3px var(--primary-100);
}

/* ========================================
   LOADING STATES
   ======================================== */

.loading {
    opacity: 0.6;
    pointer-events: none;
}

.loading::after {
    content: "";
    position: absolute;
    top: 50%;
    left: 50%;
    width: 20px;
    height: 20px;
    margin: -10px 0 0 -10px;
    border: 2px solid var(--border-color);
    border-top-color: var(--brand-primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}
/* ========================================
   RING VISUALIZATION
   ======================================== */

.ring-visualization {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    margin-bottom: var(--spacing-lg);
    border: 1px solid var(--border-color);
    text-align: center;
}

.ring-visualization h3 {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: var(--spacing-lg);
    color: var(--text-primary);
}

.ring-visual-container {
    position: relative;
    width: 280px;
    height: 280px;
    margin: 0 auto var(--spacing-md);
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
}

.finger-svg {
    position: absolute;
    width: 70px;
    height: 270px;
    z-index: 1;
}

.finger-shape {
    fill: var(--bg-input);
    stroke: var(--border-color);
    stroke-width: 2;
}

.ring-svg {
    position: absolute;
    width: 180px;
    height: 180px;
    z-index: 2;
    transition: all var(--transition-base);
}

.ring-circle {
    fill: var(--brand-primary);
    opacity: 0.3;
    transition: all var(--transition-base);
}

.ring-inner {
    fill: var(--bg-card);
    stroke: var(--brand-primary);
    stroke-width: 3;
    transition: all var(--transition-base);
}

.ring-size-label {
    margin-top: var(--spacing-md);
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--brand-primary);
    padding: var(--spacing-md);
    background: var(--primary-100);
    border-radius: var(--radius-md);
    display: inline-block;
}

/* Responsive for ring visualization */
@media (max-width: 768px) {
    .ring-visual-container {
        width: 220px;
        height: 220px;
    }
    
    .finger-svg {
        width: 55px;
        height: 210px;
    }
    
    .ring-svg {
        width: 140px;
        height: 140px;
    }
}

@media (max-width: 480px) {
    .ring-visual-container {
        width: 180px;
        height: 180px;
    }
    
    .finger-svg {
        width: 45px;
        height: 180px;
    }
    
    .ring-svg {
        width: 120px;
        height: 120px;
    }
}

/* ========================================
   TABLE SECTION
   ======================================== */

.table-section {
    background: var(--bg-card);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--border-color);
    overflow: hidden;
    margin-top: var(--spacing-xl);
}

.table-header {
    background: linear-gradient(135deg, var(--brand-primary) 0%, var(--brand-secondary) 100%);
    padding: var(--spacing-xl) var(--spacing-2xl);
    color: white;
}

.table-header h3 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    color: white;
}

.table-header p {
    opacity: 0.95;
    font-size: 0.95rem;
    color: rgba(255, 255, 255, 0.9);
}

.table-actions {
    display: flex;
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
    flex-wrap: wrap;
}

.table-btn {
    background: rgba(255, 255, 255, 0.2);
    color: white;
    border: 2px solid rgba(255, 255, 255, 0.5);
    padding: 0.6rem 1.2rem;
    border-radius: var(--radius-md);
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-base);
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    text-decoration: none;
    font-size: 0.9rem;
}

.table-btn:hover {
    background: rgba(255, 255, 255, 0.3);
    border-color: rgba(255, 255, 255, 0.8);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.table-btn.export-btn {
    background: var(--bg-card);
    color: var(--brand-primary);
    border-color: var(--brand-primary);
}

.table-btn.export-btn:hover {
    background: white;
    border-color: var(--brand-secondary);
    color: var(--brand-secondary);
}

.table-container {
    padding: var(--spacing-2xl);
    overflow-x: auto;
}

.size-table {
    width: 100%;
    border-collapse: collapse;
    margin-top: var(--spacing-md);
}

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

.size-table th {
    background: var(--bg-secondary);
    font-weight: 700;
    color: var(--text-primary);
}

.size-table td {
    color: var(--text-secondary);
}

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

.size-table tr.selected {
    background: var(--primary-100);
    border-left: 3px solid var(--brand-primary);
}

.size-table tr.highlighted {
    background: var(--primary-100);
    border-left: 4px solid var(--brand-primary);
    font-weight: 600;
}

.size-badge {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    border-radius: var(--radius-md);
    font-size: 0.8rem;
    font-weight: 600;
}

/* ========================================
   GUIDE SECTION
   ======================================== */

.guide-section {
    background: var(--bg-card);
    border-radius: var(--radius-xl);
    padding: var(--spacing-2xl);
    margin-top: var(--spacing-xl);
    border: 1px solid var(--border-color);
}

.guide-section h2 {
    font-size: 1.75rem;
    font-weight: 700;
    margin-bottom: var(--spacing-xl);
    color: var(--text-primary);
}

.guide-steps {
    display: grid;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

.guide-step {
    display: flex;
    gap: var(--spacing-lg);
    padding: var(--spacing-xl);
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    border-left: 4px solid var(--brand-primary);
    transition: all var(--transition-base);
}

.guide-step:hover {
    transform: translateX(4px);
    box-shadow: var(--shadow-md);
}

.step-number {
    flex-shrink: 0;
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, var(--brand-primary) 0%, var(--brand-secondary) 100%);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 800;
}

.step-title {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
}

.step-description {
    color: var(--text-secondary);
    line-height: 1.6;
    font-size: 0.95rem;
}

.guide-tips {
    padding: var(--spacing-xl);
    background: linear-gradient(135deg, var(--primary-100) 0%, var(--primary-50) 100%);
    border-radius: var(--radius-lg);
    border: 2px solid var(--primary-200);
}

.guide-tips h3 {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: var(--spacing-lg);
    color: var(--text-primary);
}

.guide-tips ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.guide-tips li {
    padding: var(--spacing-sm) 0;
    color: var(--text-secondary);
    line-height: 1.6;
    font-size: 0.95rem;
    position: relative;
    padding-left: var(--spacing-lg);
}

.guide-tips li:before {
    content: "✓";
    position: absolute;
    left: 0;
    color: var(--brand-primary);
    font-weight: bold;
}

/* ========================================
   SEO CONTENT
   ======================================== */

.seo-content {
    background: var(--bg-card);
    border-radius: var(--radius-xl);
    padding: var(--spacing-2xl);
    margin-top: var(--spacing-xl);
    border: 1px solid var(--border-color);
}

.seo-content h2 {
    font-size: 1.75rem;
    font-weight: 700;
    margin-bottom: var(--spacing-xl);
    color: var(--text-primary);
}

.seo-content h3 {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    margin-top: var(--spacing-xl);
    color: var(--text-primary);
}

.seo-content p {
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: var(--spacing-md);
    font-size: 0.95rem;
}

/* ========================================
   FAQ SECTION
   ======================================== */

.faq-section {
    background: var(--bg-card);
    border-radius: var(--radius-xl);
    padding: var(--spacing-2xl);
    margin-top: var(--spacing-xl);
    border: 1px solid var(--border-color);
}

.faq-section h3 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-xl);
    color: var(--text-primary);
}

.faq-item {
    margin-bottom: var(--spacing-lg);
    border-bottom: 1px solid var(--border-color);
    padding-bottom: var(--spacing-lg);
}

.faq-item:last-child {
    border-bottom: none;
    margin-bottom: 0;
    padding-bottom: 0;
}

.faq-question {
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
    font-size: 1.05rem;
}

.faq-answer {
    color: var(--text-secondary);
    line-height: 1.6;
    font-size: 0.95rem;
}

/* ========================================
   RESPONSIVE DESIGN
   ======================================== */

@media (max-width: 768px) {
    .converter-intro {
        padding: var(--spacing-xl) var(--spacing-lg);
    }
    
    .intro-title {
        font-size: 1.75rem;
    }
    
    .card-header {
        padding: var(--spacing-md) var(--spacing-lg);
    }
    
    .card-body {
        padding: var(--spacing-lg);
    }
    
    .results-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .table-actions {
        flex-direction: column;
    }
    
    .table-btn {
        width: 100%;
        justify-content: center;
    }
    
    .action-btn {
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .results-grid {
        grid-template-columns: 1fr;
    }
    
    .unit-toggle-section {
        flex-wrap: wrap;
    }
    
    .guide-step {
        flex-direction: column;
        text-align: center;
    }
    
    .guide-step {
        padding: var(--spacing-lg);
    }
}

/* ========================================
   PRINT STYLES
   ======================================== */

@media print {
    .ring-converter-container {
        display: block;
    }
    
    .converter-intro,
    .visualization-card,
    .actions-card,
    .unit-toggle-section {
        display: none;
    }
    
    .converter-card,
    .results-card {
        page-break-inside: avoid;
        box-shadow: none;
    }
}

/* ========================================
   NOTIFICATIONS
   ======================================== */

.notification {
    position: fixed;
    top: var(--spacing-xl);
    right: var(--spacing-xl);
    background: var(--bg-card);
    padding: var(--spacing-md) var(--spacing-xl);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
    border: 2px solid var(--border-color);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    z-index: 1000;
    opacity: 0;
    transform: translateX(100%);
    transition: all var(--transition-base);
}

.notification.show {
    opacity: 1;
    transform: translateX(0);
}

.notification-success {
    border-color: #4CAF50;
    background: #E8F5E9;
}

.notification-error {
    border-color: #f44336;
    background: #FFEBEE;
}

.notification-info {
    border-color: var(--brand-primary);
    background: var(--primary-100);
}

.notification-icon {
    font-size: 1.25rem;
    font-weight: bold;
}

.notification-success .notification-icon {
    color: #4CAF50;
}

.notification-error .notification-icon {
    color: #f44336;
}

.notification-info .notification-icon {
    color: var(--brand-primary);
}

/* Table section */
.table-section {
    background: var(--bg-card);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--border-color);
    overflow: hidden;
    margin-top: var(--spacing-xl);
}

.table-header {
    background: linear-gradient(135deg, var(--brand-primary) 0%, var(--brand-secondary) 100%);
    padding: var(--spacing-xl) var(--spacing-2xl);
    color: white;
}

.table-header h3 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    color: white;
}

.table-header p {
    opacity: 0.95;
    font-size: 0.95rem;
    color: rgba(255, 255, 255, 0.9);
}

.table-actions {
    display: flex;
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
    flex-wrap: wrap;
}

.table-btn {
    background: rgba(255, 255, 255, 0.2);
    color: white;
    border: 2px solid rgba(255, 255, 255, 0.5);
    padding: 0.6rem 1.2rem;
    border-radius: var(--radius-md);
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-base);
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    text-decoration: none;
    font-size: 0.9rem;
}

.table-btn:hover {
    background: rgba(255, 255, 255, 0.3);
    border-color: rgba(255, 255, 255, 0.8);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.table-btn.export-btn {
    background: var(--bg-card);
    color: var(--brand-primary);
    border-color: var(--brand-primary);
}

.table-btn.export-btn:hover {
    background: white;
    border-color: var(--brand-secondary);
    color: var(--brand-secondary);
}

.table-container {
    padding: var(--spacing-2xl);
    overflow-x: auto;
}

.size-table {
    width: 100%;
    border-collapse: collapse;
    margin-top: var(--spacing-md);
}

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

.size-table th {
    background: var(--bg-secondary);
    font-weight: 700;
    color: var(--text-primary);
}

.size-table td {
    color: var(--text-secondary);
}

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

.size-table tr.selected {
    background: var(--primary-100);
    border-left: 3px solid var(--brand-primary);
}

/* FAQ Section */
.faq-section {
    background: var(--bg-card);
    border-radius: var(--radius-xl);
    padding: var(--spacing-2xl);
    margin-top: var(--spacing-xl);
    border: 1px solid var(--border-color);
}

.faq-section h3 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-xl);
    color: var(--text-primary);
}

.faq-item {
    margin-bottom: var(--spacing-lg);
    border-bottom: 1px solid var(--border-color);
    padding-bottom: var(--spacing-lg);
}

.faq-item:last-child {
    border-bottom: none;
    margin-bottom: 0;
    padding-bottom: 0;
}

.faq-question {
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
    font-size: 1.05rem;
}

.faq-answer {
    color: var(--text-secondary);
    line-height: 1.6;
    font-size: 0.95rem;
}

/* Size Guide Section */
.size-guide-section {
    background: var(--bg-card);
    border-radius: var(--radius-xl);
    padding: var(--spacing-2xl);
    margin-top: var(--spacing-xl);
    border: 1px solid var(--border-color);
}

.size-guide-section h3 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-lg);
    color: var(--text-primary);
}

.size-guide-section p {
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: var(--spacing-md);
    font-size: 0.95rem;
}

/* Tips Section */
.tips-section {
    background: linear-gradient(135deg, var(--primary-100) 0%, var(--primary-50) 100%);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    margin-top: var(--spacing-lg);
    border: 1px solid var(--primary-200);
}

.tips-section h4 {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
}

.tips-section .tip-item {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
    padding: var(--spacing-md);
    background: rgba(255, 255, 255, 0.6);
    border-radius: var(--radius-md);
}

.tips-section .tip-icon {
    flex-shrink: 0;
    width: 24px;
    height: 24px;
    background: var(--brand-primary);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    font-size: 0.85rem;
}

.tips-section .tip-content {
    flex: 1;
}

.tips-section .tip-content strong {
    display: block;
    margin-bottom: 0.25rem;
    color: var(--text-primary);
    font-weight: 600;
}

.tips-section .tip-content p {
    margin: 0;
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.5;
}

/* Responsive for ring visualization */
@media (max-width: 768px) {
    .ring-visual-container {
        width: 200px;
        height: 200px;
    }
    
    .finger-svg {
        width: 60px;
        height: 220px;
    }
    
    .ring-svg {
        width: 150px;
        height: 150px;
    }
}

@media (max-width: 480px) {
    .ring-visual-container {
        width: 150px;
        height: 150px;
    }
    
    .finger-svg {
        width: 45px;
        height: 180px;
    }
    
    .ring-svg {
        width: 120px;
        height: 120px;
    }
    
    .table-actions {
        flex-direction: column;
    }
    
    .table-btn {
        width: 100%;
    }
}