/* ============================================
   MACO Calculator - APIC 2021
   CSS Stylesheet
   ============================================ */

/* CSS Variables / Theme - Light Theme */
:root {
    --bg-primary: #e8f4f8;
    --bg-secondary: #f0f8fa;
    --bg-card: #ffffff;
    --bg-input: #ffffff;
    --accent-blue: #2196F3;
    --accent-cyan: #00BCD4;
    --accent-green: #4CAF50;
    --accent-yellow: #FFC107;
    --accent-orange: #FF9800;
    --accent-red: #F44336;
    --accent-purple: #9C27B0;
    --text-primary: #212121;
    --text-secondary: #424242;
    --text-muted: #757575;
    --border-color: #BDBDBD;
    --shadow: 0 4px 16px rgba(0, 0, 0, 0.1);
    --glow-blue: 0 0 20px rgba(33, 150, 243, 0.2);
}

/* Reset & Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    line-height: 1.6;
}

/* Container */
.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 40px 24px;
}

/* Header Styles */
header {
    margin-bottom: 32px;
    position: relative;
    width: 100%;
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
    max-width: 1400px;
    margin: 0 auto;
    gap: 20px;
}

.header-text {
    flex: 1;
    text-align: center;
}

header::before {
    content: '';
    position: absolute;
    top: -100px;
    left: 50%;
    transform: translateX(-50%);
    width: 600px;
    height: 400px;
    background: radial-gradient(ellipse, rgba(33, 150, 243, 0.1) 0%, transparent 70%);
    pointer-events: none;
}

h1 {
    font-size: 2.8rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 12px;
    position: relative;
}

.subtitle {
    color: var(--text-secondary);
    font-size: 1.1rem;
    font-weight: 400;
}

.badge {
    display: inline-block;
    background: var(--accent-blue);
    color: white;
    padding: 6px 16px;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-top: 16px;
}

/* Tab Navigation */
.tabs {
    display: flex;
    gap: 8px;
    margin-bottom: 32px;
    flex-wrap: wrap;
    background: var(--bg-card);
    padding: 8px;
    border-radius: 12px;
    border: 1px solid var(--border-color);
}

.tab-btn {
    flex: 1;
    min-width: 180px;
    padding: 14px 20px;
    background: transparent;
    border: none;
    border-radius: 8px;
    color: var(--text-secondary);
    font-family: 'Inter', sans-serif;
    font-size: 0.95rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
}

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

.tab-btn.active {
    background: var(--accent-blue);
    color: white;
}

.tab-content {
    display: none;
}

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

/* Section Header */
.section-header {
    text-align: center;
    margin-bottom: 32px;
}

.section-header h2 {
    font-size: 1.8rem;
    color: var(--accent-cyan);
    margin-bottom: 8px;
}

.section-header p {
    color: var(--text-secondary);
}

/* Grid Layout */
.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 24px;
    margin-bottom: 32px;
}

.sampling-grid {
    margin-bottom: 0;
}

/* Card Styles */
.card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 28px;
    position: relative;
    overflow: hidden;
    transition: all 0.3s ease;
}

.card:hover {
    border-color: var(--accent-blue);
    box-shadow: var(--glow-blue);
}

.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--accent-blue);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.card:hover::before {
    opacity: 1;
}

.sampling-card {
    margin-bottom: 24px;
}

.add-product-card {
    margin-bottom: 24px;
}

.card-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 24px;
}

.card-icon {
    width: 44px;
    height: 44px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.4rem;
}

.card-icon.blue { background: rgba(33, 150, 243, 0.15); }
.card-icon.green { background: rgba(76, 175, 80, 0.15); }
.card-icon.purple { background: rgba(156, 39, 176, 0.15); }
.card-icon.orange { background: rgba(255, 152, 0, 0.15); }
.card-icon.cyan { background: rgba(0, 188, 212, 0.15); }

.card-title {
    font-size: 1.15rem;
    font-weight: 600;
    color: var(--text-primary);
}

.card-subtitle {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-top: 2px;
}

/* Form Elements */
.form-group {
    margin-bottom: 20px;
}

.form-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 16px;
    margin-bottom: 16px;
}

.form-row-single {
    display: grid;
    grid-template-columns: 1.5fr 0.8fr 0.8fr 0.8fr 0.8fr 0.8fr 0.8fr 0.8fr;
    gap: 0;
    align-items: end;
    margin-bottom: 0;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    overflow: hidden;
}

.product-form {
    margin-top: 8px;
}

.form-actions-below {
    display: flex;
    gap: 8px;
    margin-top: 12px;
    justify-content: flex-start;
}

.form-actions-below .btn-add,
.form-actions-below .btn-clear {
    padding: 10px 20px;
    font-size: 0.9rem;
}

.form-row-single .form-group {
    border-right: 1px solid var(--border-color);
    margin-bottom: 0;
    padding: 0;
}

.form-row-single .form-group:last-child {
    border-right: none;
}

.form-row-single .form-group label {
    font-size: 0.7rem;
    margin-bottom: 4px;
    padding: 6px 8px;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    display: block;
    line-height: 1.3;
    min-height: 40px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    color: var(--text-primary);
}

.form-row-single .form-group label .unit {
    display: block;
    font-size: 0.65rem;
    color: var(--accent-cyan);
    margin-top: 2px;
    font-family: 'JetBrains Mono', monospace;
}

.form-row-single .form-group input,
.form-row-single .form-group select {
    padding: 6px 8px;
    font-size: 0.85rem;
    border: none;
    border-radius: 0;
    background: var(--bg-input);
    color: var(--text-primary);
    width: 100%;
}

.form-row-single .form-group input[type="number"]::-webkit-inner-spin-button,
.form-row-single .form-group input[type="number"]::-webkit-outer-spin-button {
    -webkit-appearance: none;
    margin: 0;
}

.form-row-single .form-group input[type="number"] {
    -moz-appearance: textfield;
}

.form-row-single .form-group input:focus,
.form-row-single .form-group select:focus {
    outline: 2px solid var(--accent-blue);
    outline-offset: -2px;
    background: var(--bg-card);
}

.excel-input {
    border: none !important;
    border-radius: 0 !important;
}

.excel-input:focus {
    outline: 2px solid var(--accent-blue) !important;
    outline-offset: -2px !important;
}

.form-actions {
    display: flex;
    gap: 12px;
    margin-top: 20px;
}

label {
    display: block;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

label .required {
    color: var(--accent-red);
    margin-left: 2px;
}

label .unit {
    color: var(--accent-cyan);
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.75rem;
    margin-left: 4px;
}

input, select {
    width: 100%;
    padding: 12px 14px;
    background: var(--bg-input);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    color: var(--text-primary);
    font-family: 'Inter', sans-serif;
    font-size: 0.9rem;
    transition: all 0.2s ease;
}

/* Remove spinner arrows from number inputs globally */
input[type="number"]::-webkit-inner-spin-button,
input[type="number"]::-webkit-outer-spin-button {
    -webkit-appearance: none;
    margin: 0;
}

input[type="number"] {
    -moz-appearance: textfield;
}

/* Ensure table inputs also have no spinners */
.product-table input[type="number"],
.combinations-table input[type="number"],
.ranked-table input[type="number"] {
    -moz-appearance: textfield;
}

.product-table input[type="number"]::-webkit-inner-spin-button,
.product-table input[type="number"]::-webkit-outer-spin-button,
.combinations-table input[type="number"]::-webkit-inner-spin-button,
.combinations-table input[type="number"]::-webkit-outer-spin-button,
.ranked-table input[type="number"]::-webkit-inner-spin-button,
.ranked-table input[type="number"]::-webkit-outer-spin-button {
    -webkit-appearance: none;
    margin: 0;
    display: none;
}

input:focus, select:focus {
    outline: none;
    border-color: var(--accent-blue);
    box-shadow: 0 0 0 3px rgba(33, 150, 243, 0.15);
}

input::placeholder {
    color: var(--text-muted);
}

select {
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='%23424242' viewBox='0 0 16 16'%3E%3Cpath d='M8 11L3 6h10l-5 5z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 16px center;
}

.hint {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: 6px;
    font-style: italic;
}

/* Buttons */
.btn-calculate {
    width: 100%;
    padding: 18px 32px;
    background: var(--accent-blue);
    border: none;
    border-radius: 12px;
    color: white;
    font-family: 'Inter', sans-serif;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 32px;
}

.btn-calculate:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(33, 150, 243, 0.4);
    background: #1976D2;
}

.btn-calculate:active {
    transform: translateY(0);
}

.btn-add {
    padding: 12px 24px;
    background: var(--accent-green);
    border: none;
    border-radius: 8px;
    color: white;
    font-family: 'Inter', sans-serif;
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
}

.btn-add:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 16px rgba(76, 175, 80, 0.4);
    background: #45a049;
}

.btn-clear {
    padding: 12px 24px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-secondary);
    font-family: 'Inter', sans-serif;
    font-size: 0.95rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
}

.btn-clear:hover {
    border-color: var(--accent-red);
    color: var(--accent-red);
    background: rgba(244, 67, 54, 0.05);
}

.btn-secondary {
    padding: 10px 20px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-secondary);
    font-family: 'Inter', sans-serif;
    font-size: 0.85rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
}

.btn-secondary:hover {
    border-color: var(--accent-blue);
    color: var(--accent-blue);
    background: rgba(33, 150, 243, 0.05);
}

.btn-danger {
    padding: 10px 20px;
    background: rgba(244, 67, 54, 0.1);
    border: 1px solid var(--accent-red);
    border-radius: 8px;
    color: var(--accent-red);
    font-family: 'Inter', sans-serif;
    font-size: 0.85rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
}

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

.btn-small {
    padding: 6px 12px;
    font-size: 0.8rem;
    border-radius: 6px;
    border: none;
    cursor: pointer;
    transition: all 0.2s ease;
}

.btn-edit {
    background: rgba(33, 150, 243, 0.15);
    color: var(--accent-blue);
}

.btn-edit:hover {
    background: var(--accent-blue);
    color: white;
}

.btn-delete {
    background: rgba(244, 67, 54, 0.15);
    color: var(--accent-red);
}

.btn-delete:hover {
    background: var(--accent-red);
    color: white;
}

/* Tables */
.table-container {
    overflow-x: auto;
    margin: 16px 0;
}

.table-actions {
    display: flex;
    gap: 12px;
    margin-top: 16px;
    flex-wrap: wrap;
}

.product-table,
.combinations-table,
.ranked-table {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0;
    font-size: 0.9rem;
}

.product-table th,
.product-table td,
.combinations-table th,
.combinations-table td,
.ranked-table th,
.ranked-table td {
    padding: 12px 16px;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
    white-space: nowrap;
}

.product-table th,
.combinations-table th,
.ranked-table th {
    background: var(--bg-secondary);
    color: var(--text-primary);
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    position: sticky;
    top: 0;
}

.product-table td,
.combinations-table td,
.ranked-table td {
    background: var(--bg-card);
    font-family: 'Inter', sans-serif;
    color: var(--text-primary);
}

.product-table tbody tr:hover td,
.ranked-table tbody tr:hover td {
    background: var(--bg-card);
}

/* Excel-like table navigation */
.product-table tbody td.editable-cell {
    cursor: cell;
    user-select: none;
    position: relative;
    outline: none;
}

.product-table tbody td.editable-cell:hover {
    background: var(--bg-card) !important;
}

.product-table tbody td.editable-cell:focus {
    outline: none;
}

.product-table tbody td.editable-cell.selected {
    background: rgba(33, 150, 243, 0.15) !important;
    outline: 2px solid var(--accent-blue);
    outline-offset: -2px;
}

.product-table tbody td.editable-cell:focus.selected {
    outline: 2px solid var(--accent-blue);
    outline-offset: -2px;
}

.product-table tbody tr.selected-row td {
    background: rgba(33, 150, 243, 0.1) !important;
}

.product-table tbody td.editing {
    padding: 0 !important;
}

.product-table tbody td.editing input,
.product-table tbody td.editing select {
    width: 100%;
    padding: 4px 8px;
    border: none;
    background: var(--bg-card);
    color: var(--text-primary);
    font-family: 'Inter', sans-serif;
    font-size: 0.85rem;
    margin: 0;
    border-radius: 0;
    outline: 2px solid var(--accent-blue);
    outline-offset: -2px;
}

.product-table tbody td.editing input[type="number"]::-webkit-inner-spin-button,
.product-table tbody td.editing input[type="number"]::-webkit-outer-spin-button {
    -webkit-appearance: none;
    margin: 0;
}

.product-table tbody td.editing input[type="number"] {
    -moz-appearance: textfield;
}

.empty-row td {
    text-align: center;
    color: var(--text-muted);
    font-style: italic;
    padding: 40px;
    font-family: 'Inter', sans-serif;
}

/* Combinations Table Special Styles */
.combinations-table th:first-child {
    background: var(--bg-card);
    font-weight: 600;
    color: var(--text-primary);
}

.combinations-table td:first-child {
    background: var(--bg-secondary);
    font-weight: 500;
    color: var(--text-primary);
}

.combinations-table .worst-cell {
    background: rgba(244, 67, 54, 0.2) !important;
    color: var(--accent-red);
    font-weight: 700;
}

.combinations-table .cell-value {
    color: var(--accent-cyan);
}

/* Warning Message */
.warning {
    background: rgba(244, 67, 54, 0.1);
    border: 1px solid var(--accent-red);
    border-radius: 10px;
    padding: 16px 20px;
    color: var(--accent-red);
    font-size: 0.9rem;
    margin-bottom: 20px;
    display: none;
}

.warning.show {
    display: block;
}

/* Results Section */
.results-section {
    background: var(--bg-card);
    border: 2px solid var(--border-color);
    border-radius: 20px;
    padding: 36px;
    margin-bottom: 32px;
    display: none;
}

.results-section.show {
    display: block;
}

.results-header {
    text-align: center;
    margin-bottom: 32px;
}

.results-header h2 {
    font-size: 1.8rem;
    color: var(--accent-cyan);
    margin-bottom: 8px;
}

.results-header p {
    color: var(--text-secondary);
}

/* Results Table */
.results-table {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0;
    margin-bottom: 32px;
}

.results-table th,
.results-table td {
    padding: 16px 20px;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.results-table th {
    background: var(--bg-secondary);
    color: var(--text-primary);
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.results-table th:first-child {
    border-radius: 10px 0 0 0;
}

.results-table th:last-child {
    border-radius: 0 10px 0 0;
}

.results-table td {
    background: var(--bg-card);
    font-family: 'Inter', sans-serif;
    color: var(--text-primary);
}

.results-table tr:last-child td:first-child {
    border-radius: 0 0 0 10px;
}

.results-table tr:last-child td:last-child {
    border-radius: 0 0 10px 0;
}

.results-table .method {
    color: var(--text-primary);
    font-weight: 500;
}

.results-table .value {
    color: var(--accent-cyan);
    font-weight: 600;
    font-size: 1.1rem;
}

.results-table .na {
    color: var(--text-muted);
    font-style: italic;
}

.results-table .selected {
    background: rgba(76, 175, 80, 0.1);
}

.results-table .selected td {
    border-color: var(--accent-green);
}

/* Final Result Display */
.final-result {
    background: linear-gradient(135deg, rgba(76, 175, 80, 0.1), rgba(0, 188, 212, 0.1));
    border: 2px solid var(--accent-green);
    border-radius: 16px;
    padding: 32px;
    text-align: center;
}

.final-label {
    font-size: 0.9rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 2px;
    margin-bottom: 12px;
}

.final-value {
    font-family: 'JetBrains Mono', monospace;
    font-size: 3.5rem;
    font-weight: 700;
    color: var(--accent-green);
    line-height: 1;
}

.final-unit {
    font-size: 1.5rem;
    color: var(--text-secondary);
    margin-left: 8px;
}

.final-basis {
    margin-top: 16px;
    font-size: 1rem;
    color: var(--accent-cyan);
}

/* Limits Grid */
.limits-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 20px;
    margin-top: 32px;
}

.limit-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 24px;
    text-align: center;
}

.limit-icon {
    font-size: 2rem;
    margin-bottom: 12px;
}

.limit-label {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

.limit-value {
    font-family: 'JetBrains Mono', monospace;
    font-size: 1.8rem;
    font-weight: 600;
    color: var(--accent-purple);
}

.limit-unit {
    font-size: 0.9rem;
    color: var(--text-muted);
}

.limit-note {
    font-size: 0.75rem;
    color: var(--accent-cyan);
    margin-top: 8px;
    font-style: italic;
}

/* Worst Case Section */
.worst-case-section {
    background: linear-gradient(135deg, rgba(244, 67, 54, 0.1), rgba(255, 152, 0, 0.1));
    border: 2px solid var(--accent-red);
    border-radius: 20px;
    padding: 32px;
    margin-bottom: 32px;
}

.worst-case-header {
    text-align: center;
    margin-bottom: 28px;
}

.worst-case-header h3 {
    font-size: 1.4rem;
    color: var(--accent-red);
}

.worst-case-content {
    display: grid;
    gap: 24px;
}

.worst-case-products {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 24px;
    flex-wrap: wrap;
}

.wc-product {
    background: var(--bg-card);
    padding: 20px 32px;
    border-radius: 12px;
    text-align: center;
    min-width: 200px;
}

.wc-label {
    display: block;
    font-size: 0.8rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 8px;
}

.wc-value {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--text-primary);
}

.wc-arrow {
    font-size: 2rem;
    color: var(--accent-orange);
}

.worst-case-maco {
    background: var(--bg-card);
    padding: 28px;
    border-radius: 16px;
    text-align: center;
}

.wc-maco-label {
    font-size: 0.85rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 12px;
}

.wc-maco-value {
    font-family: 'JetBrains Mono', monospace;
    font-size: 3rem;
    font-weight: 700;
    color: var(--accent-red);
}

.wc-maco-basis {
    margin-top: 12px;
    color: var(--accent-cyan);
}

.worst-case-limits {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 16px;
}

.wc-limit {
    background: var(--bg-card);
    padding: 16px;
    border-radius: 10px;
    text-align: center;
}

.wc-limit-label {
    display: block;
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-bottom: 8px;
}

.wc-limit-value {
    font-family: 'JetBrains Mono', monospace;
    font-size: 1.4rem;
    font-weight: 600;
    color: var(--accent-purple);
}

.wc-limit-unit {
    display: block;
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: 4px;
}

/* Swab and Rinse Limits Display */
.limits-display {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
    margin-top: 24px;
}

.swab-rinse-limit-card {
    background: linear-gradient(135deg, rgba(33, 150, 243, 0.1), rgba(156, 39, 176, 0.1));
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 28px;
    text-align: center;
    transition: transform 0.2s, box-shadow 0.2s;
}

.swab-rinse-limit-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow);
}

.limit-header {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    margin-bottom: 20px;
}

.limit-icon {
    font-size: 2.2rem;
}

.limit-title {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
}

.limit-value-display {
    margin: 20px 0;
}

.limit-value {
    font-family: 'JetBrains Mono', monospace;
    font-size: 2.4rem;
    font-weight: 700;
    color: var(--accent-cyan);
    display: block;
    margin-bottom: 8px;
}

.limit-unit {
    font-size: 1rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.limit-description {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-top: 12px;
    line-height: 1.5;
}

.limits-details {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 20px;
    margin-top: 24px;
}

.limit-detail-row {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 0;
    border-bottom: 1px solid var(--border-color);
}

.limit-detail-row:last-child {
    border-bottom: none;
}

.detail-label {
    font-size: 0.9rem;
    color: var(--text-secondary);
    min-width: 140px;
}

.detail-value {
    font-family: 'JetBrains Mono', monospace;
    font-size: 1rem;
    font-weight: 600;
    color: var(--accent-cyan);
    flex: 1;
}

.detail-unit {
    font-size: 0.85rem;
    color: var(--text-muted);
}

/* Ranked Table */
.ranked-table .rank-1 td {
    background: rgba(244, 67, 54, 0.15);
}

.ranked-table .rank-1 td:nth-child(4) {
    color: var(--accent-red);
    font-weight: 700;
}

/* Formula Section */
.formula-section {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 32px;
    margin-bottom: 24px;
}

.formula-section h3 {
    color: var(--accent-cyan);
    margin-bottom: 24px;
    font-size: 1.3rem;
}

.formula-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 20px;
}

.formula-item {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    padding: 20px;
}

.formula-name {
    font-weight: 600;
    color: var(--accent-blue);
    margin-bottom: 12px;
    font-size: 0.95rem;
}

.formula-code {
    font-family: 'Inter', sans-serif;
    font-size: 0.85rem;
    color: var(--accent-cyan);
    background: var(--bg-secondary);
    padding: 12px;
    border-radius: 6px;
    overflow-x: auto;
}

.formula-desc {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: 8px;
    font-style: italic;
}

.abbrev-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 12px;
}

.abbrev-item {
    padding: 12px 16px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-size: 0.9rem;
}

.abbrev-item strong {
    color: var(--accent-cyan);
}

/* Footer */
footer {
    text-align: center;
    margin-top: 48px;
    padding-top: 32px;
    border-top: 1px solid var(--border-color);
    color: var(--text-muted);
    font-size: 0.85rem;
}

footer a {
    color: var(--accent-blue);
    text-decoration: none;
}

footer a:hover {
    text-decoration: underline;
}

.footer-note {
    margin-top: 8px;
}

/* Responsive Design */
@media (max-width: 1200px) {
    .form-row-single {
        grid-template-columns: repeat(4, 1fr);
    }
    
    .form-actions-inline {
        grid-column: 1 / -1;
    }
}

@media (max-width: 768px) {
    .grid {
        grid-template-columns: 1fr;
    }
    
    h1 {
        font-size: 2rem;
    }
    
    .final-value {
        font-size: 2.5rem;
    }
    
    .container {
        padding: 20px 16px;
    }
    
    .card {
        padding: 20px;
    }
    
    .results-section {
        padding: 24px;
    }
    
    .formula-grid {
        grid-template-columns: 1fr;
    }
    
    .tabs {
        flex-direction: column;
    }
    
    .tab-btn {
        min-width: 100%;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .form-row-single {
        grid-template-columns: 1fr;
        gap: 0;
    }
    
    .form-row-single .form-group {
        border-right: none;
        border-bottom: 1px solid var(--border-color);
    }
    
    .form-row-single .form-group:last-child {
        border-bottom: none;
    }
    
    .worst-case-products {
        flex-direction: column;
    }
    
    .wc-arrow {
        transform: rotate(90deg);
    }
}

@media (max-width: 480px) {
    h1 {
        font-size: 1.6rem;
    }
    
    .subtitle {
        font-size: 0.95rem;
    }
    
    .final-value {
        font-size: 2rem;
    }
    
    .limits-grid {
        grid-template-columns: 1fr;
    }
    
    .wc-maco-value {
        font-size: 2rem;
    }
}

/* Help Button */
.btn-help {
    padding: 12px 24px;
    background: var(--accent-blue);
    border: none;
    border-radius: 8px;
    color: white;
    font-family: 'Inter', sans-serif;
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    white-space: nowrap;
    margin-left: 20px;
}

.btn-help:hover {
    background: #1976D2;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(33, 150, 243, 0.3);
}

/* Help Modal */
.help-modal {
    display: none;
    position: fixed;
    z-index: 10000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    overflow: auto;
    background-color: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
}

.help-modal.show {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.help-modal-content {
    background-color: var(--bg-card);
    margin: auto;
    border: 1px solid var(--border-color);
    border-radius: 16px;
    width: 90%;
    max-width: 1000px;
    max-height: 90vh;
    display: flex;
    flex-direction: column;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
    animation: modalSlideIn 0.3s ease;
}

@keyframes modalSlideIn {
    from {
        opacity: 0;
        transform: translateY(-50px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.help-modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 24px 32px;
    border-bottom: 2px solid var(--border-color);
    background: var(--bg-secondary);
    border-radius: 16px 16px 0 0;
}

.help-modal-header h2 {
    margin: 0;
    color: var(--text-primary);
    font-size: 1.5rem;
}

.help-close {
    color: var(--text-secondary);
    font-size: 2rem;
    font-weight: bold;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    transition: all 0.2s ease;
}

.help-close:hover {
    background: rgba(244, 67, 54, 0.1);
    color: var(--accent-red);
}

.help-modal-body {
    padding: 32px;
    overflow-y: auto;
    flex: 1;
}

.help-section {
    margin-bottom: 32px;
}

.help-section:last-child {
    margin-bottom: 0;
}

.help-section h3 {
    color: var(--accent-blue);
    font-size: 1.3rem;
    margin-bottom: 16px;
    padding-bottom: 8px;
    border-bottom: 2px solid var(--border-color);
}

.help-section h4 {
    color: var(--text-primary);
    font-size: 1.1rem;
    margin-top: 20px;
    margin-bottom: 12px;
}

.help-step {
    background: var(--bg-secondary);
    border-left: 4px solid var(--accent-blue);
    padding: 16px 20px;
    margin-bottom: 16px;
    border-radius: 4px;
}

.help-step strong {
    color: var(--accent-blue);
    display: block;
    margin-bottom: 8px;
}

.help-step ul {
    margin: 8px 0;
    padding-left: 24px;
}

.help-step ul li {
    margin-bottom: 6px;
    color: var(--text-primary);
    line-height: 1.6;
}

.help-step ul ul {
    margin-top: 6px;
    margin-bottom: 6px;
}

.help-step ul ul li {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.help-diagram {
    background: var(--bg-secondary);
    padding: 24px;
    border-radius: 12px;
    margin: 20px 0;
}

.diagram-step {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
}

.diagram-box {
    background: var(--accent-blue);
    color: white;
    padding: 16px 32px;
    border-radius: 8px;
    font-weight: 600;
    text-align: center;
    min-width: 200px;
    box-shadow: 0 4px 12px rgba(33, 150, 243, 0.3);
}

.diagram-arrow {
    font-size: 1.5rem;
    color: var(--accent-blue);
    font-weight: bold;
}

.help-faq {
    background: var(--bg-secondary);
    padding: 20px;
    border-radius: 12px;
}

.help-faq p {
    margin-bottom: 16px;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-primary);
    line-height: 1.7;
}

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

.help-faq strong {
    color: var(--accent-blue);
    display: block;
    margin-bottom: 6px;
}

.help-shortcuts {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 12px;
    margin-top: 16px;
}

.shortcut-item {
    background: var(--bg-secondary);
    padding: 12px 16px;
    border-radius: 8px;
    display: flex;
    align-items: center;
    gap: 12px;
    color: var(--text-primary);
}

.shortcut-item kbd {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    padding: 4px 8px;
    font-family: 'Inter', monospace;
    font-size: 0.85rem;
    color: var(--accent-blue);
    font-weight: 600;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.help-modal-footer {
    padding: 20px 32px;
    border-top: 1px solid var(--border-color);
    display: flex;
    justify-content: flex-end;
    background: var(--bg-secondary);
    border-radius: 0 0 16px 16px;
}

@media (max-width: 768px) {
    .help-modal-content {
        width: 95%;
        max-height: 95vh;
    }
    
    .help-modal-header,
    .help-modal-body {
        padding: 20px;
    }
    
    .help-modal-header h2 {
        font-size: 1.2rem;
    }
    
    .diagram-step {
        gap: 8px;
    }
    
    .diagram-box {
        min-width: 150px;
        padding: 12px 20px;
        font-size: 0.9rem;
    }
    
    .help-shortcuts {
        grid-template-columns: 1fr;
    }
    
    .btn-help {
        padding: 8px 16px;
        font-size: 0.85rem;
        margin-left: 10px;
    }
    
    .header-content {
        flex-direction: column;
        gap: 16px;
    }
    
    .header-text {
        width: 100%;
    }
    
    .btn-help {
        margin-left: 0;
        width: 100%;
        max-width: 300px;
    }
}