:root {
    --posture-bg: #0F172A;
    --posture-surface: #1E293B;
    --posture-tone-start: #1D4ED8;
    --posture-tone-end: #6D28D9;
    --posture-tone-hover: #2563EB;
    --posture-ink: #F8FAFC;
    --posture-ink-muted: #94A3B8;
    --posture-gradient-fill: linear-gradient(135deg, var(--posture-tone-start), var(--posture-tone-end));
    
    --font-display: 'Montserrat', sans-serif;
    --font-body: 'Inter', sans-serif;
    
    --radius-soft: 16px;
    --shadow-deep: 0 20px 25px -5px rgba(0, 0, 0, 0.5), 0 10px 10px -5px rgba(0, 0, 0, 0.3);
    --shadow-elevated: 0 10px 15px -3px rgba(0, 0, 0, 0.4);
    --padding-spacious: 16dvh;
}

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

body {
    font-family: var(--font-body);
    background-color: var(--posture-bg);
    color: var(--posture-ink);
    line-height: 1.6;
    overflow-x: hidden;
}

img, svg {
    max-width: 100%;
    display: block;
}

a {
    color: inherit;
    text-decoration: none;
}

/* Typography elements */
.main-headline-txt {
    font-family: var(--font-display);
    font-size: clamp(2.5rem, 5vw, 4.5rem);
    font-weight: 900;
    line-height: 1.1;
    margin-bottom: 1.5rem;
    color: var(--posture-ink);
}

.intro-sub-txt {
    font-size: 1.25rem;
    color: var(--posture-ink-muted);
    margin-bottom: 2.5rem;
    max-width: 800px;
}

.zone-heading-txt {
    font-family: var(--font-display);
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 700;
    margin-bottom: 1.5rem;
    color: var(--posture-ink);
}

.zone-desc-txt {
    font-size: 1.125rem;
    color: var(--posture-ink-muted);
    margin-bottom: 3rem;
}

.centered-txt {
    text-align: center;
}

/* Buttons */
.action-trigger-solid {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 1rem 2.5rem;
    background: var(--posture-ink);
    color: var(--posture-bg);
    font-weight: 600;
    font-family: var(--font-display);
    border-radius: var(--radius-soft);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    cursor: pointer;
    border: none;
}

.action-trigger-solid:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-deep);
}

.action-trigger-dark {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 1rem 2.5rem;
    background: var(--posture-bg);
    color: var(--posture-ink);
    font-weight: 600;
    font-family: var(--font-display);
    border-radius: var(--radius-soft);
    transition: background 0.3s ease;
}

.action-trigger-dark:hover {
    background: var(--posture-surface);
}

/* Header */
.posture-top-header {
    background: var(--posture-gradient-fill);
    color: var(--posture-ink);
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: var(--shadow-deep);
}

.posture-header-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.25rem 5%;
    max-width: 1440px;
    margin: 0 auto;
}

.posture-brand-link {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-family: var(--font-display);
    font-weight: 900;
    font-size: 1.5rem;
}

.posture-nav-cluster {
    display: flex;
    gap: 2rem;
    align-items: center;
}

.nav-route-link {
    font-family: var(--font-display);
    font-weight: 600;
    font-size: 1rem;
    text-transform: uppercase;
    position: relative;
}

.nav-route-link.active-route::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 100%;
    height: 2px;
    background: var(--posture-ink);
}

.nav-route-link:hover {
    opacity: 0.8;
}

/* Mobile Nav Toggle */
.toggle-hidden {
    display: none;
}

.hamburger-trigger {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    z-index: 101;
}

.burger-line {
    width: 25px;
    height: 3px;
    background: var(--posture-ink);
    border-radius: 2px;
    transition: 0.3s;
}

@media (max-width: 768px) {
    .hamburger-trigger {
        display: flex;
    }
    .posture-nav-cluster {
        display: none;
        flex-direction: column;
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background: var(--posture-surface);
        padding: 2rem 5%;
        box-shadow: var(--shadow-deep);
    }
    #mobile-toggle-input:checked ~ .posture-nav-cluster {
        display: flex;
    }
}

/* Hero Section */
.intro-visual-panel, .compact-intro-panel, .thank-you-area {
    position: relative;
    min-height: 100vh;
    background-size: cover;
    background-position: center;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--padding-spacious) 5%;
    text-align: center;
}

.compact-intro-panel {
    min-height: 60vh;
}

.thank-you-area {
    flex-direction: column;
}

.intro-gradient-overlay, .thank-you-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--posture-gradient-fill);
    opacity: 0.85;
    z-index: 1;
}

.thank-you-overlay {
    background: var(--posture-bg);
    opacity: 0.9;
}

.intro-content-core, .thank-you-core {
    position: relative;
    z-index: 2;
    max-width: 900px;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.thank-you-icon {
    width: 80px;
    height: 80px;
    color: var(--posture-tone-start);
    margin-bottom: 2rem;
}

/* Stat Counters Strip in Hero */
.metric-counters-strip {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 3rem;
    margin-top: 4rem;
    padding-top: 3rem;
    border-top: 1px solid rgba(255,255,255,0.2);
    width: 100%;
}

.metric-node {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.metric-digit, .metric-plus {
    font-size: 3rem;
    font-weight: 900;
    font-family: var(--font-display);
    line-height: 1;
}

.metric-label {
    font-size: 1rem;
    color: var(--posture-ink-muted);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-top: 0.5rem;
}

/* Trust Marks inside Hero */
.trust-marks-line {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 1.5rem;
    margin-top: 2rem;
    font-size: 0.9rem;
    color: var(--posture-ink-muted);
}

/* Horizontal Insights Scroll Section */
.horizontal-insights-area {
    position: relative;
    padding: var(--padding-spacious) 5%;
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
}

.insights-overlay {
    position: absolute;
    inset: 0;
    background: var(--posture-surface);
    opacity: 0.95;
    z-index: 1;
}

.insights-inner-core {
    position: relative;
    z-index: 2;
    max-width: 1440px;
    margin: 0 auto;
}

.insights-scroll-track {
    display: flex;
    gap: 2rem;
    margin-top: 3rem;
}

.insight-piece {
    flex: 1;
    background: var(--posture-bg);
    padding: 2.5rem;
    border-radius: var(--radius-soft);
    box-shadow: var(--shadow-elevated);
}

.insight-icon {
    width: 48px;
    height: 48px;
    color: var(--posture-tone-start);
    margin-bottom: 1.5rem;
}

.insight-topic {
    font-family: var(--font-display);
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: var(--posture-ink);
}

.insight-detail {
    color: var(--posture-ink-muted);
}

@media (max-width: 768px) {
    .insights-scroll-track {
        overflow-x: auto;
        scroll-snap-type: x mandatory;
        padding-bottom: 1rem;
    }
    .insight-piece {
        flex: 0 0 85%;
        scroll-snap-align: center;
    }
}

/* Benefits Grid (2x2) */
.benefits-matrix-zone {
    padding: var(--padding-spacious) 5%;
    background: var(--posture-bg);
}

.matrix-inner-core {
    max-width: 1200px;
    margin: 0 auto;
}

.benefits-grid-layout {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2rem;
    margin-top: 4rem;
}

.benefit-item {
    background: var(--posture-surface);
    padding: 3rem;
    border-radius: var(--radius-soft);
    box-shadow: var(--shadow-deep);
    transition: all 0.4s ease;
    display: flex;
    flex-direction: column;
}

.benefit-icon-ring {
    width: 64px;
    height: 64px;
    border-radius: 50%;
    background: var(--posture-gradient-fill);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.5rem;
    color: var(--posture-ink);
}

.benefit-icon-ring svg {
    width: 32px;
    height: 32px;
}

.benefit-subject {
    font-family: var(--font-display);
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

.benefit-explanation {
    color: var(--posture-ink-muted);
}

.benefit-item:hover {
    background: var(--posture-gradient-fill);
    color: var(--posture-ink);
}

.benefit-item:hover .benefit-icon-ring {
    background: var(--posture-ink);
    color: var(--posture-tone-start);
}

.benefit-item:hover .benefit-explanation {
    color: rgba(255,255,255,0.9);
}

@media (max-width: 768px) {
    .benefits-grid-layout {
        grid-template-columns: 1fr;
    }
}

/* Methodology Steps */
.methodology-path-zone {
    padding: var(--padding-spacious) 5%;
    background: var(--posture-surface);
}

.methodology-inner-core {
    max-width: 1200px;
    margin: 0 auto;
}

.methodology-flow-layout {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-top: 4rem;
    position: relative;
}

.methodology-flow-layout::before {
    content: '';
    position: absolute;
    top: 32px;
    left: 0;
    width: 100%;
    height: 2px;
    background: var(--posture-tone-start);
    z-index: 1;
}

.method-step-node {
    position: relative;
    z-index: 2;
    flex: 1;
    text-align: center;
    padding: 0 1rem;
}

.method-circle-indicator {
    width: 64px;
    height: 64px;
    background: var(--posture-gradient-fill);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 900;
    font-family: var(--font-display);
    margin: 0 auto 1.5rem auto;
    box-shadow: var(--shadow-elevated);
}

.method-title-txt {
    font-size: 1.25rem;
    margin-bottom: 1rem;
    font-family: var(--font-display);
}

.method-body-txt {
    color: var(--posture-ink-muted);
}

@media (max-width: 768px) {
    .methodology-flow-layout {
        flex-direction: column;
        gap: 3rem;
    }
    .methodology-flow-layout::before {
        left: 32px;
        top: 0;
        width: 2px;
        height: 100%;
    }
    .method-step-node {
        display: flex;
        text-align: left;
        gap: 1.5rem;
        padding: 0;
        align-items: flex-start;
    }
    .method-circle-indicator {
        margin: 0;
        flex-shrink: 0;
    }
}

/* CTA Ribbon */
.action-invitation-strip {
    background: var(--posture-gradient-fill);
    padding: calc(var(--padding-spacious) * 0.6) 5%;
}

.invitation-inner-core {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 2rem;
}

.invitation-headline-txt {
    font-family: var(--font-display);
    font-size: clamp(2rem, 3vw, 2.5rem);
    font-weight: 900;
}

@media (max-width: 768px) {
    .invitation-inner-core {
        flex-direction: column;
        text-align: center;
    }
}

/* Expert Bio Section */
.specialist-bio-layout {
    display: flex;
    background: var(--posture-surface);
}

.bio-visual-frame {
    flex: 0 0 40%;
    background-size: cover;
    background-position: center;
    min-height: 50vh;
}

.bio-content-frame {
    flex: 0 0 60%;
    padding: var(--padding-spacious) 5%;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

@media (max-width: 992px) {
    .specialist-bio-layout {
        flex-direction: column;
    }
    .bio-visual-frame {
        width: 100%;
        min-height: 400px;
    }
}

/* Expert Metrics */
.expert-metrics-zone {
    padding: var(--padding-spacious) 5%;
    background: var(--posture-bg);
}

.metrics-grid-layout {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 2rem;
}

.metric-card-node {
    background: var(--posture-surface);
    padding: 3rem 2rem;
    text-align: center;
    border-radius: var(--radius-soft);
    box-shadow: var(--shadow-deep);
}

.metric-giant-digit {
    display: block;
    font-size: 3.5rem;
    font-weight: 900;
    font-family: var(--font-display);
    color: var(--posture-tone-start);
    line-height: 1;
    margin-bottom: 1rem;
}

.metric-label-bold {
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
}

@media (max-width: 992px) {
    .metrics-grid-layout {
        grid-template-columns: repeat(2, 1fr);
    }
}
@media (max-width: 576px) {
    .metrics-grid-layout {
        grid-template-columns: 1fr;
    }
}

/* Reserve Booking Area */
.booking-dual-layout {
    display: flex;
    gap: 4rem;
    padding: var(--padding-spacious) 5%;
    max-width: 1440px;
    margin: 0 auto;
}

.booking-info-pane {
    flex: 1;
    position: relative;
}

.booking-info-pane .main-headline-txt {
    font-size: clamp(2rem, 4vw, 3.5rem);
}

.trust-contact-txt {
    color: var(--posture-ink-muted);
    margin-bottom: 3rem;
}

.mailto-link {
    color: var(--posture-tone-start);
    text-decoration: underline;
}

.info-bullet-cards {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.bullet-card-node {
    background: var(--posture-surface);
    padding: 2rem;
    border-radius: var(--radius-soft);
    box-shadow: var(--shadow-elevated);
}

.bullet-node-icon {
    width: 32px;
    height: 32px;
    color: var(--posture-tone-start);
    margin-bottom: 1rem;
}

.bullet-node-title {
    font-family: var(--font-display);
    font-size: 1.25rem;
    margin-bottom: 0.5rem;
}

.bullet-node-desc {
    color: var(--posture-ink-muted);
    margin-bottom: 1rem;
}

.bullet-node-list {
    list-style: none;
}

.bullet-node-list li {
    position: relative;
    padding-left: 1.5rem;
    margin-bottom: 0.5rem;
    color: var(--posture-ink-muted);
}

.bullet-node-list li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 8px;
    width: 8px;
    height: 8px;
    background: var(--posture-tone-start);
    border-radius: 50%;
}

.booking-form-pane {
    flex: 1;
}

.appt-request-form {
    background: var(--posture-surface);
    padding: 3rem;
    border-radius: var(--radius-soft);
    box-shadow: var(--shadow-deep);
}

.form-heading-txt {
    font-family: var(--font-display);
    font-size: 2rem;
    margin-bottom: 2rem;
}

.form-field-group {
    margin-bottom: 1.5rem;
}

.form-label-txt {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
}

.form-input-node {
    width: 100%;
    padding: 1rem;
    background: var(--posture-bg);
    border: 1px solid rgba(255,255,255,0.1);
    color: var(--posture-ink);
    border-radius: 8px;
    font-family: var(--font-body);
}

.form-input-node:focus {
    outline: none;
    border-color: var(--posture-tone-start);
}

.textarea-node {
    resize: vertical;
}

.form-policy-group {
    display: flex;
    gap: 1rem;
    align-items: flex-start;
    margin-bottom: 2rem;
}

.policy-checkbox-node {
    margin-top: 5px;
    accent-color: var(--posture-tone-start);
}

.policy-label-txt {
    font-size: 0.9rem;
    color: var(--posture-ink-muted);
}

.policy-label-txt a {
    color: var(--posture-tone-start);
    text-decoration: underline;
}

.form-submit-trigger {
    width: 100%;
    padding: 1rem;
    background: var(--posture-gradient-fill);
    color: var(--posture-ink);
    border: none;
    border-radius: 8px;
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 1.1rem;
    cursor: pointer;
    transition: opacity 0.3s;
}

.form-submit-trigger:hover {
    opacity: 0.9;
}

@media (max-width: 992px) {
    .booking-dual-layout {
        flex-direction: column;
    }
}

/* FAQ Accordion */
.faq-accordion-zone {
    padding: var(--padding-spacious) 5%;
    background: var(--posture-surface);
}

.faq-list-layout {
    max-width: 800px;
    margin: 3rem auto 0;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.faq-item-node {
    background: var(--posture-bg);
    padding: 1.5rem;
    border-radius: var(--radius-soft);
    box-shadow: var(--shadow-elevated);
}

.faq-question-txt {
    font-family: var(--font-display);
    font-size: 1.25rem;
    font-weight: 700;
    cursor: pointer;
    list-style: none;
    position: relative;
    padding-right: 2rem;
}

.faq-question-txt::-webkit-details-marker {
    display: none;
}

.faq-answer-txt {
    color: var(--posture-ink-muted);
    margin-top: 1rem;
    padding-top: 1rem;
    border-top: 1px solid rgba(255,255,255,0.1);
}

/* Legal Pages */
.legal-document-area {
    padding: var(--padding-spacious) 5%;
    background: var(--posture-bg);
    min-height: 100vh;
}

.legal-content-core {
    max-width: 800px;
    margin: 0 auto;
    background: var(--posture-surface);
    padding: 4rem;
    border-radius: var(--radius-soft);
    box-shadow: var(--shadow-deep);
}

.legal-content-core .method-body-txt {
    margin-bottom: 1.5rem;
}

.cookie-policy-section {
    margin-top: 4rem;
    padding-top: 3rem;
    border-top: 1px solid rgba(255,255,255,0.1);
}

@media (max-width: 768px) {
    .legal-content-core {
        padding: 2rem;
    }
}

/* Footer Section */
.knee-site-footer {
    background: #000;
    padding: 4rem 5% 2rem;
    color: var(--posture-ink);
}

.footer-inner-core {
    max-width: 1440px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
}

.footer-brand-zone {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-family: var(--font-display);
    font-weight: 900;
    font-size: 1.5rem;
    margin-bottom: 2rem;
    color: var(--posture-ink);
}

.footer-legal-links {
    display: flex;
    gap: 2rem;
    margin-bottom: 2rem;
    flex-wrap: wrap;
    justify-content: center;
}

.footer-legal-links a {
    color: var(--posture-ink-muted);
    transition: color 0.3s;
}

.footer-legal-links a:hover {
    color: var(--posture-ink);
}

.footer-disclaimer-txt {
    font-size: 0.85rem;
    color: var(--posture-ink-muted);
    margin-bottom: 1rem;
    max-width: 600px;
}

.footer-copyright-txt {
    font-size: 0.85rem;
    color: #555;
}

/* Cookie Consent */
.cookie-plate-hidden {
    display: none !important;
}

#cookie-consent-plate {
    position: fixed;
    bottom: 0;
    left: 0;
    width: 100%;
    background: var(--posture-surface);
    padding: 1.5rem 5%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: 0 -10px 25px rgba(0,0,0,0.5);
    z-index: 9999;
}

.cookie-msg {
    color: var(--posture-ink);
    font-size: 1rem;
    max-width: 800px;
}

.cookie-actions-group {
    display: flex;
    gap: 1rem;
}

.cookie-btn-primary {
    background: var(--posture-gradient-fill);
    color: white;
    border: none;
    padding: 0.75rem 1.5rem;
    border-radius: 6px;
    cursor: pointer;
    font-weight: 600;
}

.cookie-btn-secondary {
    background: transparent;
    color: var(--posture-ink);
    border: 1px solid var(--posture-ink-muted);
    padding: 0.75rem 1.5rem;
    border-radius: 6px;
    cursor: pointer;
}

@media (max-width: 768px) {
    #cookie-consent-plate {
        flex-direction: column;
        gap: 1rem;
        text-align: center;
    }
}