/* ========================================
   ARTHROVIA - Interactive Tools Styles
   ======================================== */

/* === Tool Hero Section === */
.tool-hero {
    background: linear-gradient(135deg, #EEF2FF 0%, #E0F2FE 50%, #CCFBF1 100%);
    padding: 4rem 0 3rem;
    text-align: center;
}

.tool-hero h1 {
    font-size: clamp(1.75rem, 4.5vw, 2.75rem);
    font-weight: 800;
    margin-bottom: 1rem;
    color: var(--clr-text);
    line-height: 1.15;
}

.tool-hero p {
    color: var(--clr-text-mid);
    font-size: 1.1rem;
    max-width: 600px;
    margin: 0 auto;
    line-height: 1.6;
}

/* === Tool Container === */
.tool-container {
    max-width: 800px;
    margin: 0 auto;
    padding: 2.5rem 1.5rem 4rem;
}

/* === Tool Card === */
.tool-card {
    background: var(--clr-white);
    box-shadow: var(--shadow-lg);
    padding: 32px;
    border-radius: 16px;
    margin-bottom: 2rem;
    position: relative;
    overflow: hidden;
}

.tool-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--clr-primary), var(--clr-accent));
}

/* === Tool Form === */
.tool-form {
    display: flex;
    flex-direction: column;
}

/* === Input Group === */
.tool-input-group {
    margin-bottom: 20px;
}

.tool-label {
    display: block;
    font-weight: 600;
    color: var(--clr-text);
    margin-bottom: 8px;
    font-size: 0.95rem;
}

.tool-label-hint {
    font-weight: 400;
    color: var(--clr-text-light);
    font-size: 0.82rem;
    margin-left: 4px;
}

/* === Inputs & Selects === */
.tool-input,
.tool-select {
    width: 100%;
    padding: 12px 16px;
    border: 1.5px solid #E2E8F0;
    border-radius: 10px;
    font-size: 1rem;
    font-family: var(--font-body);
    color: var(--clr-text);
    background: var(--clr-white);
    transition: var(--transition);
    outline: none;
}

.tool-input:focus,
.tool-select:focus {
    border-color: var(--clr-primary);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.12);
}

.tool-input::placeholder {
    color: var(--clr-text-light);
}

.tool-select {
    appearance: none;
    -webkit-appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg width='12' height='8' viewBox='0 0 12 8' fill='none' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M1 1.5L6 6.5L11 1.5' stroke='%2394A3B8' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 16px center;
    padding-right: 44px;
}

.tool-textarea {
    width: 100%;
    padding: 12px 16px;
    border: 1.5px solid #E2E8F0;
    border-radius: 10px;
    font-size: 0.95rem;
    font-family: var(--font-body);
    color: var(--clr-text);
    background: var(--clr-white);
    transition: var(--transition);
    outline: none;
    resize: vertical;
    min-height: 80px;
}

.tool-textarea:focus {
    border-color: var(--clr-primary);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.12);
}

/* === Range Slider === */
.tool-range {
    -webkit-appearance: none;
    appearance: none;
    width: 100%;
    height: 8px;
    border-radius: 4px;
    background: linear-gradient(90deg, #22C55E 0%, #FACC15 40%, #F97316 70%, #EF4444 100%);
    outline: none;
    cursor: pointer;
    margin: 12px 0 6px;
}

.tool-range::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: var(--clr-white);
    border: 3px solid var(--clr-primary);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
    cursor: pointer;
    transition: transform 0.15s ease;
}

.tool-range::-webkit-slider-thumb:hover {
    transform: scale(1.15);
}

.tool-range::-moz-range-thumb {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: var(--clr-white);
    border: 3px solid var(--clr-primary);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
    cursor: pointer;
}

.tool-range-labels {
    display: flex;
    justify-content: space-between;
    font-size: 0.78rem;
    color: var(--clr-text-light);
    margin-top: 2px;
}

.tool-range-value {
    text-align: center;
    font-size: 2rem;
    font-weight: 800;
    font-family: var(--font-heading);
    margin: 4px 0 8px;
    transition: color 0.3s ease;
}

/* === Radio Button Group (Pill/Card Style) === */
.tool-radio-group {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
    margin-top: 6px;
}

.tool-radio-option {
    border: 1.5px solid #E2E8F0;
    border-radius: 10px;
    padding: 12px 16px;
    cursor: pointer;
    transition: var(--transition);
    text-align: center;
    font-size: 0.92rem;
    font-weight: 500;
    color: var(--clr-text-mid);
    background: var(--clr-white);
    position: relative;
    user-select: none;
}

.tool-radio-option:hover {
    border-color: var(--clr-primary-light);
    color: var(--clr-primary);
}

.tool-radio-option.selected {
    border-color: var(--clr-primary);
    background: rgba(37, 99, 235, 0.05);
    color: var(--clr-primary);
    font-weight: 600;
    box-shadow: 0 0 0 2px rgba(37, 99, 235, 0.1);
}

.tool-radio-option input[type="radio"] {
    position: absolute;
    opacity: 0;
    width: 0;
    height: 0;
}

/* === Checkbox Group === */
.tool-checkbox-group {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
    margin-top: 6px;
}

.tool-checkbox-option {
    display: flex;
    align-items: center;
    gap: 8px;
    border: 1.5px solid #E2E8F0;
    border-radius: 10px;
    padding: 10px 14px;
    cursor: pointer;
    transition: var(--transition);
    font-size: 0.9rem;
    color: var(--clr-text-mid);
    user-select: none;
}

.tool-checkbox-option:hover {
    border-color: var(--clr-primary-light);
}

.tool-checkbox-option.selected {
    border-color: var(--clr-primary);
    background: rgba(37, 99, 235, 0.05);
    color: var(--clr-primary);
}

.tool-checkbox-option input[type="checkbox"] {
    accent-color: var(--clr-primary);
    width: 16px;
    height: 16px;
}

/* === Submit/Calculate Button === */
.tool-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    width: 100%;
    padding: 16px 24px;
    background: linear-gradient(135deg, var(--clr-primary), var(--clr-accent));
    color: var(--clr-white);
    font-size: 1.05rem;
    font-weight: 700;
    font-family: var(--font-heading);
    border: none;
    border-radius: var(--radius-full);
    cursor: pointer;
    transition: var(--transition);
    margin-top: 8px;
    box-shadow: 0 4px 15px rgba(37, 99, 235, 0.25);
    animation: tool-pulse 2.5s infinite;
}

.tool-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(37, 99, 235, 0.35);
}

@keyframes tool-pulse {
    0%, 100% { box-shadow: 0 4px 15px rgba(37, 99, 235, 0.25); }
    50% { box-shadow: 0 4px 30px rgba(37, 99, 235, 0.4); }
}

.tool-btn-secondary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 24px;
    background: transparent;
    color: var(--clr-primary);
    font-size: 0.95rem;
    font-weight: 600;
    border: 2px solid var(--clr-primary);
    border-radius: var(--radius-full);
    cursor: pointer;
    transition: var(--transition);
    margin-top: 12px;
}

.tool-btn-secondary:hover {
    background: var(--clr-primary);
    color: var(--clr-white);
}

/* === Progress Bar === */
.tool-progress {
    width: 100%;
    height: 6px;
    background: #E2E8F0;
    border-radius: 3px;
    margin-bottom: 28px;
    overflow: hidden;
}

.tool-progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--clr-primary), var(--clr-accent));
    border-radius: 3px;
    transition: width 0.4s ease;
}

.tool-step-label {
    font-size: 0.82rem;
    color: var(--clr-text-light);
    margin-bottom: 8px;
    font-weight: 500;
}

/* === Result Section === */
.tool-result {
    display: none;
    animation: fadeInUp 0.5s ease;
}

.tool-result.visible {
    display: block;
}

@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

.tool-result-card {
    background: var(--clr-white);
    border-radius: 14px;
    padding: 28px;
    margin-bottom: 16px;
    border-left: 5px solid;
    box-shadow: var(--shadow-md);
}

.tool-result-card.green { border-left-color: #22C55E; }
.tool-result-card.yellow { border-left-color: #FACC15; }
.tool-result-card.orange { border-left-color: #F97316; }
.tool-result-card.red { border-left-color: #EF4444; }

/* === Score Display === */
.tool-score {
    font-size: 3.5rem;
    font-weight: 900;
    font-family: var(--font-heading);
    line-height: 1;
    margin-bottom: 4px;
}

.tool-score-label {
    font-size: 0.9rem;
    color: var(--clr-text-mid);
    font-weight: 500;
}

/* === Meter Bar === */
.tool-meter {
    width: 100%;
    height: 14px;
    background: #E2E8F0;
    border-radius: 7px;
    overflow: hidden;
    margin: 12px 0;
    position: relative;
}

.tool-meter-fill {
    height: 100%;
    border-radius: 7px;
    transition: width 1.2s ease;
    position: relative;
}

.tool-meter-low .tool-meter-fill {
    background: linear-gradient(90deg, #22C55E, #4ADE80);
}

.tool-meter-medium .tool-meter-fill {
    background: linear-gradient(90deg, #FACC15, #F59E0B);
}

.tool-meter-high .tool-meter-fill {
    background: linear-gradient(90deg, #F97316, #EF4444);
}

.tool-meter-labels {
    display: flex;
    justify-content: space-between;
    font-size: 0.75rem;
    color: var(--clr-text-light);
    margin-top: 4px;
}

.tool-meter-marker {
    position: absolute;
    top: -6px;
    width: 4px;
    height: 26px;
    background: var(--clr-text);
    border-radius: 2px;
    transform: translateX(-50%);
    transition: left 1.2s ease;
    z-index: 2;
}

/* Full gradient meter */
.tool-meter-gradient {
    width: 100%;
    height: 14px;
    background: linear-gradient(90deg, #22C55E 0%, #4ADE80 20%, #FACC15 40%, #F97316 65%, #EF4444 85%, #DC2626 100%);
    border-radius: 7px;
    position: relative;
    margin: 12px 0;
}

/* === Recommendation Box === */
.tool-recommendation {
    background: rgba(37, 99, 235, 0.04);
    border: 1px solid rgba(37, 99, 235, 0.15);
    border-radius: 12px;
    padding: 20px 24px;
    margin-top: 16px;
}

.tool-recommendation h3 {
    font-size: 1.05rem;
    margin-bottom: 10px;
    color: var(--clr-text);
}

.tool-recommendation-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.tool-recommendation-list li {
    padding: 6px 0;
    padding-left: 26px;
    position: relative;
    font-size: 0.92rem;
    color: var(--clr-text-mid);
    line-height: 1.5;
}

.tool-recommendation-list li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 12px;
    width: 16px;
    height: 16px;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 18 18' fill='none' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M15.75 4.5L6.75 13.5L2.25 9' stroke='%230D9488' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
    background-size: contain;
    background-repeat: no-repeat;
}

/* === Chart Container === */
.tool-chart-container {
    min-height: 300px;
    background: var(--clr-white);
    border-radius: 12px;
    padding: 20px;
    margin: 16px 0;
    border: 1px solid var(--clr-border);
}

.tool-chart-container svg {
    width: 100%;
    height: 100%;
}

/* === History Section === */
.tool-history {
    margin-top: 24px;
}

.tool-history-entry {
    display: flex;
    align-items: flex-start;
    gap: 16px;
    padding: 16px;
    border: 1px solid var(--clr-border);
    border-radius: 12px;
    margin-bottom: 10px;
    background: var(--clr-white);
    transition: var(--transition);
}

.tool-history-entry:hover {
    border-color: var(--clr-primary-light);
    box-shadow: var(--shadow-sm);
}

.tool-history-date {
    font-size: 0.82rem;
    color: var(--clr-text-light);
    min-width: 80px;
    font-weight: 500;
}

.tool-history-content {
    flex: 1;
}

.tool-history-actions {
    display: flex;
    gap: 8px;
}

.tool-history-actions button {
    padding: 4px 10px;
    font-size: 0.78rem;
    border-radius: 6px;
    cursor: pointer;
    transition: var(--transition);
    border: 1px solid var(--clr-border);
    background: var(--clr-white);
    color: var(--clr-text-mid);
}

.tool-history-actions button:hover {
    border-color: var(--clr-primary);
    color: var(--clr-primary);
}

.tool-history-actions button.delete:hover {
    border-color: var(--clr-red);
    color: var(--clr-red);
}

/* === Export Button === */
.tool-export-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 20px;
    border: 2px solid var(--clr-border);
    border-radius: var(--radius-full);
    color: var(--clr-text-mid);
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    background: var(--clr-white);
    transition: var(--transition);
}

.tool-export-btn:hover {
    border-color: var(--clr-primary);
    color: var(--clr-primary);
}

/* === Info Section === */
.tool-info-section {
    padding: 3rem 0;
}

.tool-info-section h2 {
    font-size: clamp(1.4rem, 3.5vw, 1.85rem);
    margin-bottom: 1rem;
    color: var(--clr-text);
}

.tool-info-section h3 {
    font-size: 1.1rem;
    margin: 1.5rem 0 0.5rem;
    color: var(--clr-text);
}

.tool-info-section p {
    color: var(--clr-text-mid);
    font-size: 0.95rem;
    line-height: 1.7;
    margin-bottom: 0.75rem;
}

.tool-info-section ul {
    color: var(--clr-text-mid);
    font-size: 0.95rem;
    line-height: 1.7;
    padding-left: 1.2rem;
    margin-bottom: 1rem;
}

/* === BMI Categories Grid === */
.tool-bmi-categories {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: 12px;
    margin: 20px 0;
}

.tool-bmi-category {
    border: 1.5px solid var(--clr-border);
    border-radius: 12px;
    padding: 16px;
    text-align: center;
    transition: var(--transition);
}

.tool-bmi-category .cat-label {
    font-weight: 700;
    font-size: 0.85rem;
    margin-bottom: 4px;
    display: block;
}

.tool-bmi-category .cat-range {
    font-size: 0.8rem;
    color: var(--clr-text-light);
    display: block;
}

.tool-bmi-category .cat-risk {
    font-size: 0.75rem;
    font-weight: 600;
    margin-top: 6px;
    display: block;
}

.tool-bmi-category.active {
    transform: scale(1.05);
    box-shadow: var(--shadow-md);
}

.tool-bmi-category.sottopeso { border-color: #60A5FA; }
.tool-bmi-category.sottopeso .cat-label { color: #2563EB; }
.tool-bmi-category.sottopeso .cat-risk { color: #22C55E; }
.tool-bmi-category.sottopeso.active { background: rgba(37, 99, 235, 0.05); }

.tool-bmi-category.normopeso { border-color: #4ADE80; }
.tool-bmi-category.normopeso .cat-label { color: #16A34A; }
.tool-bmi-category.normopeso .cat-risk { color: #22C55E; }
.tool-bmi-category.normopeso.active { background: rgba(34, 197, 94, 0.05); }

.tool-bmi-category.sovrappeso { border-color: #FACC15; }
.tool-bmi-category.sovrappeso .cat-label { color: #CA8A04; }
.tool-bmi-category.sovrappeso .cat-risk { color: #F59E0B; }
.tool-bmi-category.sovrappeso.active { background: rgba(250, 204, 21, 0.05); }

.tool-bmi-category.obesita1 { border-color: #FB923C; }
.tool-bmi-category.obesita1 .cat-label { color: #EA580C; }
.tool-bmi-category.obesita1 .cat-risk { color: #F97316; }
.tool-bmi-category.obesita1.active { background: rgba(249, 115, 22, 0.05); }

.tool-bmi-category.obesita2 { border-color: #F87171; }
.tool-bmi-category.obesita2 .cat-label { color: #DC2626; }
.tool-bmi-category.obesita2 .cat-risk { color: #EF4444; }
.tool-bmi-category.obesita2.active { background: rgba(239, 68, 68, 0.05); }

.tool-bmi-category.obesita3 { border-color: #EF4444; }
.tool-bmi-category.obesita3 .cat-label { color: #B91C1C; }
.tool-bmi-category.obesita3 .cat-risk { color: #DC2626; }
.tool-bmi-category.obesita3.active { background: rgba(239, 68, 68, 0.08); }

/* === BMI Scale Ruler === */
.tool-bmi-scale {
    width: 100%;
    height: 24px;
    background: linear-gradient(90deg, #60A5FA 0%, #4ADE80 18%, #22C55E 30%, #FACC15 50%, #F97316 65%, #EF4444 80%, #DC2626 100%);
    border-radius: 12px;
    position: relative;
    margin: 20px 0 30px;
}

.tool-bmi-scale-marker {
    position: absolute;
    top: -8px;
    width: 6px;
    height: 40px;
    background: var(--clr-text);
    border-radius: 3px;
    transform: translateX(-50%);
    transition: left 1s ease;
}

.tool-bmi-scale-marker::after {
    content: attr(data-value);
    position: absolute;
    bottom: -22px;
    left: 50%;
    transform: translateX(-50%);
    font-size: 0.8rem;
    font-weight: 700;
    white-space: nowrap;
    color: var(--clr-text);
}

.tool-bmi-scale-labels {
    display: flex;
    justify-content: space-between;
    font-size: 0.72rem;
    color: var(--clr-text-light);
    margin-top: 0;
    padding: 0 2px;
}

/* === Diary Calendar === */
.diary-calendar {
    margin: 16px 0;
}

.diary-calendar-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 12px;
}

.diary-calendar-header h3 {
    font-size: 1rem;
    font-weight: 700;
}

.diary-calendar-nav {
    display: flex;
    gap: 8px;
}

.diary-calendar-nav button {
    width: 32px;
    height: 32px;
    border-radius: 8px;
    border: 1px solid var(--clr-border);
    background: var(--clr-white);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--clr-text-mid);
    transition: var(--transition);
}

.diary-calendar-nav button:hover {
    border-color: var(--clr-primary);
    color: var(--clr-primary);
}

.diary-weekdays {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 4px;
    margin-bottom: 4px;
}

.diary-weekday {
    text-align: center;
    font-size: 0.72rem;
    font-weight: 600;
    color: var(--clr-text-light);
    text-transform: uppercase;
    padding: 6px 0;
}

.diary-days {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 4px;
}

.diary-day {
    aspect-ratio: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 8px;
    font-size: 0.85rem;
    color: var(--clr-text-mid);
    cursor: pointer;
    transition: var(--transition);
    position: relative;
    border: 1px solid transparent;
}

.diary-day:hover {
    background: rgba(37, 99, 235, 0.06);
}

.diary-day.empty {
    cursor: default;
    pointer-events: none;
}

.diary-day.today {
    font-weight: 700;
    color: var(--clr-primary);
    border-color: var(--clr-primary);
}

.diary-day.has-entry {
    font-weight: 600;
}

.diary-day.has-entry::after {
    content: '';
    position: absolute;
    bottom: 4px;
    width: 6px;
    height: 6px;
    border-radius: 50%;
}

.diary-day.has-entry.pain-low::after { background: #22C55E; }
.diary-day.has-entry.pain-mid::after { background: #F59E0B; }
.diary-day.has-entry.pain-high::after { background: #EF4444; }

.diary-day.selected {
    background: var(--clr-primary);
    color: var(--clr-white);
    font-weight: 700;
}

.diary-day.selected::after {
    background: var(--clr-white) !important;
}

/* === Pain Level Display === */
.pain-level-display {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 4px 12px;
    border-radius: var(--radius-full);
    font-weight: 700;
    font-size: 0.85rem;
}

.pain-level-display.level-low {
    background: rgba(34, 197, 94, 0.1);
    color: #16A34A;
}

.pain-level-display.level-mid {
    background: rgba(245, 158, 11, 0.1);
    color: #D97706;
}

.pain-level-display.level-high {
    background: rgba(239, 68, 68, 0.1);
    color: #DC2626;
}

/* === Tabs === */
.tool-tabs {
    display: flex;
    gap: 0;
    margin-bottom: 24px;
    border-bottom: 2px solid var(--clr-border);
}

.tool-tab {
    padding: 12px 24px;
    font-weight: 600;
    font-size: 0.95rem;
    color: var(--clr-text-light);
    cursor: pointer;
    border-bottom: 2px solid transparent;
    margin-bottom: -2px;
    transition: var(--transition);
    background: none;
    border-left: none;
    border-right: none;
    border-top: none;
}

.tool-tab:hover {
    color: var(--clr-text-mid);
}

.tool-tab.active {
    color: var(--clr-primary);
    border-bottom-color: var(--clr-primary);
}

.tool-tab-content {
    display: none;
}

.tool-tab-content.active {
    display: block;
    animation: fadeInUp 0.3s ease;
}

/* === Stats Grid === */
.tool-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: 12px;
    margin: 20px 0;
}

.tool-stat {
    background: var(--clr-bg);
    border-radius: 12px;
    padding: 16px;
    text-align: center;
}

.tool-stat-value {
    font-size: 1.5rem;
    font-weight: 800;
    font-family: var(--font-heading);
    color: var(--clr-primary);
}

.tool-stat-label {
    font-size: 0.78rem;
    color: var(--clr-text-light);
    margin-top: 2px;
}

/* === Question Slide Transition === */
.tool-question {
    display: none;
}

.tool-question.active {
    display: block;
    animation: fadeInUp 0.35s ease;
}

.tool-question h3 {
    font-size: 1.1rem;
    margin-bottom: 16px;
    color: var(--clr-text);
    line-height: 1.4;
}

/* === Question Navigation === */
.tool-nav-buttons {
    display: flex;
    gap: 12px;
    margin-top: 24px;
}

.tool-nav-buttons .tool-btn-back {
    flex: 0 0 auto;
    padding: 12px 20px;
    background: transparent;
    color: var(--clr-text-mid);
    border: 1.5px solid var(--clr-border);
    border-radius: var(--radius-full);
    font-weight: 600;
    font-size: 0.92rem;
    cursor: pointer;
    transition: var(--transition);
}

.tool-nav-buttons .tool-btn-back:hover {
    border-color: var(--clr-text-mid);
    color: var(--clr-text);
}

.tool-nav-buttons .tool-btn-next {
    flex: 1;
    padding: 12px 24px;
    background: linear-gradient(135deg, var(--clr-primary), var(--clr-accent));
    color: var(--clr-white);
    border: none;
    border-radius: var(--radius-full);
    font-weight: 700;
    font-size: 0.95rem;
    cursor: pointer;
    transition: var(--transition);
}

.tool-nav-buttons .tool-btn-next:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 15px rgba(37, 99, 235, 0.3);
}

.tool-nav-buttons .tool-btn-next:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

/* === Per-question Analysis === */
.tool-analysis-list {
    list-style: none;
    padding: 0;
    margin: 16px 0;
}

.tool-analysis-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 0;
    border-bottom: 1px solid var(--clr-border-light);
}

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

.tool-analysis-label {
    flex: 1;
    font-size: 0.88rem;
    color: var(--clr-text-mid);
}

.tool-analysis-bar {
    width: 100px;
    height: 6px;
    background: #E2E8F0;
    border-radius: 3px;
    overflow: hidden;
}

.tool-analysis-bar-fill {
    height: 100%;
    border-radius: 3px;
    transition: width 0.8s ease;
}

.tool-analysis-score {
    font-size: 0.82rem;
    font-weight: 700;
    min-width: 24px;
    text-align: right;
}

/* === Tool CTA Section === */
.tool-cta-section {
    text-align: center;
    padding: 3.5rem 0 2rem;
}

.tool-cta-section h2 {
    font-size: clamp(1.4rem, 3.5vw, 1.85rem);
    margin-bottom: 1rem;
}

.tool-cta-section p {
    color: var(--clr-text-mid);
    font-size: 1rem;
    max-width: 560px;
    margin: 0 auto 1.5rem;
    line-height: 1.6;
}

.tool-cta-section .btn--primary {
    font-size: 1rem;
    padding: 1rem 2.5rem;
}

/* === Medical Disclaimer === */
.tool-disclaimer {
    background: rgba(245, 158, 11, 0.06);
    border: 1px solid rgba(245, 158, 11, 0.2);
    border-radius: 12px;
    padding: 16px 20px;
    margin: 24px 0;
    font-size: 0.82rem;
    color: var(--clr-text-mid);
    line-height: 1.6;
}

.tool-disclaimer strong {
    color: var(--clr-text);
}

/* === FAQ Section === */
.tool-faq {
    padding: 3rem 0;
}

.tool-faq h2 {
    font-size: clamp(1.4rem, 3.5vw, 1.85rem);
    margin-bottom: 1.5rem;
    text-align: center;
}

.tool-faq-item {
    border: 1px solid var(--clr-border);
    border-radius: 12px;
    margin-bottom: 10px;
    overflow: hidden;
    background: var(--clr-white);
}

.tool-faq-question {
    width: 100%;
    padding: 16px 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    font-weight: 600;
    font-size: 0.95rem;
    color: var(--clr-text);
    cursor: pointer;
    background: none;
    border: none;
    text-align: left;
    transition: var(--transition);
}

.tool-faq-question:hover {
    color: var(--clr-primary);
}

.tool-faq-question svg {
    flex-shrink: 0;
    transition: transform 0.3s ease;
}

.tool-faq-item.open .tool-faq-question svg {
    transform: rotate(180deg);
}

.tool-faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.35s ease, padding 0.35s ease;
}

.tool-faq-item.open .tool-faq-answer {
    max-height: 300px;
    padding: 0 20px 16px;
}

.tool-faq-answer p {
    font-size: 0.9rem;
    color: var(--clr-text-mid);
    line-height: 1.65;
}

/* === Knee Load Impact Visual === */
.tool-knee-load {
    background: linear-gradient(135deg, rgba(239, 68, 68, 0.04), rgba(249, 115, 22, 0.04));
    border: 1px solid rgba(239, 68, 68, 0.12);
    border-radius: 14px;
    padding: 24px;
    text-align: center;
    margin: 16px 0;
}

.tool-knee-load-number {
    font-size: 2.5rem;
    font-weight: 900;
    font-family: var(--font-heading);
    color: #EF4444;
}

.tool-knee-load-label {
    font-size: 0.9rem;
    color: var(--clr-text-mid);
    margin-top: 4px;
}

/* === Print Styles === */
@media print {
    .header,
    .promo-bar,
    .footer,
    .mobile-nav,
    .tool-hero,
    .breadcrumb,
    .tool-cta-section,
    .tool-faq,
    .tool-disclaimer,
    .tool-export-btn,
    .tool-btn,
    .tool-btn-secondary,
    .tool-nav-buttons,
    .tool-tabs,
    .tool-history-actions,
    .diary-calendar-nav button {
        display: none !important;
    }

    body {
        background: white;
        color: #1E293B;
        font-size: 11pt;
    }

    .tool-card {
        box-shadow: none;
        border: 1px solid #ddd;
        padding: 16px;
    }

    .tool-card::before {
        display: none;
    }

    .tool-result {
        display: block !important;
    }

    .tool-history-entry {
        break-inside: avoid;
        border: 1px solid #ddd;
    }

    .tool-chart-container {
        break-inside: avoid;
    }

    .diary-calendar {
        break-inside: avoid;
    }

    .tool-container {
        max-width: 100%;
        padding: 0;
    }

    h1 { font-size: 18pt; }
    h2 { font-size: 14pt; }

    @page {
        margin: 2cm;
    }
}

/* === Responsive === */
@media (max-width: 768px) {
    .tool-hero {
        padding: 3rem 1.25rem 2rem;
    }

    .tool-hero h1 {
        font-size: 1.5rem;
    }

    .tool-hero p {
        font-size: 0.9rem;
    }

    .tool-container {
        padding: 1.5rem 1rem 3rem;
    }

    .tool-card {
        padding: 1.5rem;
    }

    .tool-radio-group {
        grid-template-columns: 1fr;
    }

    .tool-checkbox-group {
        grid-template-columns: 1fr;
    }

    .tool-bmi-categories {
        grid-template-columns: repeat(2, 1fr);
    }

    .tool-score {
        font-size: 2.5rem;
    }

    .tool-result-card {
        padding: 20px 16px;
    }

    .tool-stats {
        grid-template-columns: repeat(2, 1fr);
    }

    .tool-tab {
        padding: 10px 14px;
        font-size: 0.85rem;
    }

    .tool-nav-buttons {
        flex-direction: column-reverse;
    }

    .tool-nav-buttons .tool-btn-back {
        text-align: center;
    }

    .tool-knee-load-number {
        font-size: 2rem;
    }

    .diary-day {
        font-size: 0.78rem;
    }

    .tool-btn {
        min-height: 48px;
        font-size: 1rem;
    }

    .tool-radio-option,
    .tool-checkbox-option {
        min-height: 44px;
        padding: 0.75rem 1rem;
    }
}

@media (max-width: 480px) {
    .tool-hero h1 {
        font-size: 1.35rem;
    }

    .tool-card {
        padding: 16px 12px;
        border-radius: 12px;
    }

    .tool-bmi-categories {
        grid-template-columns: 1fr 1fr;
        gap: 8px;
    }

    .tool-bmi-category {
        padding: 10px;
    }

    .tool-stats {
        grid-template-columns: 1fr 1fr;
        gap: 8px;
    }

    .diary-calendar {
        gap: 2px;
    }

    .diary-day {
        min-height: 32px;
        font-size: 0.75rem;
    }
}

@media (max-width: 360px) {
    .tool-bmi-categories {
        grid-template-columns: 1fr;
    }

    .tool-card {
        padding: 1.25rem;
    }

    .tool-hero h1 {
        font-size: 1.4rem;
    }

    .tool-btn {
        font-size: 0.95rem;
        padding: 0.85rem 1.5rem;
    }

    .tool-result-card {
        padding: 1.25rem;
    }

    .tool-score {
        font-size: 2.5rem;
    }

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