@import url('https://fonts.googleapis.com/css2?family=Mulish:wght@400;600&family=Playfair+Display:wght@700;900&display=swap');

:root {
    --joint-gradient: linear-gradient(135deg, #00c6ff 0%, #0072ff 100%);
    --joint-gradient-overlay: linear-gradient(135deg, rgba(0, 198, 255, 0.85) 0%, rgba(0, 114, 255, 0.85) 100%);
    --dark-overlay: linear-gradient(135deg, rgba(13, 43, 69, 0.85) 0%, rgba(58, 80, 107, 0.85) 100%);
    
    --joint-bg: #f4f9ff;
    --joint-surface: #ffffff;
    --joint-ink: #0d2b45;
    --joint-ink-light: #3a506b;
    --joint-accent: #ff0076;
    --joint-accent-hover: #d40062;
    
    --font-display: 'Playfair Display', serif;
    --font-body: 'Mulish', sans-serif;
    
    --joint-rad: 20px;
    --joint-shadow: 0 20px 40px -10px rgba(13, 43, 69, 0.25);
    --joint-shadow-hover: 0 30px 60px -15px rgba(0, 114, 255, 0.4);
    
    --pad-spacious: 16dvh;
}

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

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

h1, h2, h3, h4 {
    font-family: var(--font-display);
    text-transform: uppercase;
    font-weight: 900;
    line-height: 1.2;
}

a {
    text-decoration: none;
    color: inherit;
    transition: all 0.3s ease;
}

/* Framework classes */
.mobility-bound {
    max-width: 1440px;
    margin: 0 auto;
    padding: 0 5%;
}

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

.dark-ink-head {
    color: var(--joint-ink);
}

.light-ink {
    color: var(--joint-surface);
}

/* BUTTON */
.flex-trigger-prime {
    display: inline-block;
    background: var(--joint-ink);
    color: var(--joint-surface);
    padding: 1rem 2.5rem;
    font-weight: 600;
    border-radius: 999px;
    letter-spacing: 1px;
    box-shadow: 0 10px 20px -5px rgba(13, 43, 69, 0.4);
    border: none;
    cursor: pointer;
    text-align: center;
}

.flex-trigger-prime:hover {
    background: var(--joint-accent);
    box-shadow: var(--joint-shadow-hover);
    transform: translateY(-2px);
}

.full-width-trigger {
    width: 100%;
}

/* HEADER : Corporate Gradient Preset */
.articulation-top-bar {
    background: var(--joint-gradient);
    color: var(--joint-surface);
    filter: drop-shadow(0 4px 6px rgba(0,0,0,0.1));
    position: sticky;
    top: 0;
    z-index: 1000;
}

.articulation-top-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 80px;
}

.synovial-logo-link {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 1.2rem;
    letter-spacing: 0.5px;
}

.synovial-navigation {
    display: flex;
    gap: 2rem;
}

.synovial-nav-item {
    font-weight: 600;
    font-size: 0.95rem;
    position: relative;
    padding: 0.5rem 0;
}

.synovial-nav-item::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--joint-surface);
    transition: width 0.3s ease;
}

.synovial-nav-item:hover::after,
.synovial-nav-item.active-link::after {
    width: 100%;
}

/* MOBILE NAV (CSS ONLY) */
.synovial-burger-check {
    display: none;
}

.synovial-burger-label {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    z-index: 1010;
}

.synovial-burger-line {
    width: 25px;
    height: 3px;
    background-color: var(--joint-surface);
    transition: all 0.3s ease;
}

@media(max-width: 768px) {
    .synovial-burger-label {
        display: flex;
    }
    
    .synovial-navigation {
        position: fixed;
        top: 80px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 80px);
        background: var(--joint-gradient);
        flex-direction: column;
        align-items: center;
        justify-content: center;
        transition: left 0.4s ease;
    }
    
    .synovial-nav-item {
        font-size: 1.5rem;
    }
    
    .synovial-burger-check:checked ~ .synovial-navigation {
        left: 0;
    }
    
    .synovial-burger-check:checked + .synovial-burger-label .synovial-burger-line:nth-child(1) {
        transform: translateY(8px) rotate(45deg);
    }
    .synovial-burger-check:checked + .synovial-burger-label .synovial-burger-line:nth-child(2) {
        opacity: 0;
    }
    .synovial-burger-check:checked + .synovial-burger-label .synovial-burger-line:nth-child(3) {
        transform: translateY(-8px) rotate(-45deg);
    }
}

/* HERO ZONE */
.kinematics-hero-zone {
    position: relative;
    padding: var(--pad-spacious) 0;
    min-height: 90vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    background-size: cover;
    background-position: center;
    color: var(--joint-surface);
}

.expert-hero-shrink {
    min-height: 60vh;
}

.kinematics-hero-content {
    text-align: center;
    max-width: 900px;
    margin: 0 auto;
    z-index: 2;
}

.cartilage-prime-head {
    font-size: clamp(2.5rem, 5vw, 4.5rem);
    margin-bottom: 1.5rem;
    text-shadow: 0 4px 10px rgba(0,0,0,0.2);
}

.fibrous-sub-head {
    font-size: clamp(1.1rem, 2vw, 1.3rem);
    margin-bottom: 2.5rem;
    opacity: 0.95;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

/* STATS COUNTER BLOCKS */
.ligament-stats-ribbon {
    margin-top: 4rem;
    display: flex;
    justify-content: center;
    gap: 3rem;
    flex-wrap: wrap;
}

.ligament-stat-unit {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.ligament-stat-number {
    font-family: var(--font-display);
    font-size: 3.5rem;
    font-weight: 900;
    line-height: 1;
}

.ligament-stat-suffix {
    font-family: var(--font-display);
    font-size: 2rem;
    font-weight: 900;
    vertical-align: top;
}

.ligament-stat-note {
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    opacity: 0.8;
    margin-top: 0.5rem;
}

/* TRUST LOGOS STRIP */
.trust-emblem-strip {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(8px);
    border-top: 1px solid rgba(255,255,255,0.2);
    padding: 1.5rem 0;
}

.trust-emblem-inner {
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 1rem;
}

.trust-emblem-item {
    font-weight: 600;
    font-size: 0.85rem;
    letter-spacing: 2px;
    opacity: 0.8;
}

/* CONTENT WITH SCROLL TRACK */
.fluid-scroll-zone {
    padding: var(--pad-spacious) 0;
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
}

.cartilage-sec-head {
    font-size: clamp(2rem, 3.5vw, 3rem);
    margin-bottom: 3rem;
}

.fluid-scroll-track {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

.fluid-card-item {
    background: var(--joint-surface);
    padding: 2.5rem;
    border-radius: var(--joint-rad);
    box-shadow: var(--joint-shadow);
    transition: transform 0.3s ease;
}

.fluid-card-item:hover {
    transform: translateY(-10px);
}

.fluid-card-icon {
    width: 70px;
    height: 70px;
    background: var(--joint-bg);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.5rem;
}

.fluid-card-head {
    font-size: 1.4rem;
    color: var(--joint-ink);
    margin-bottom: 1rem;
}

.fluid-card-desc {
    color: var(--joint-ink-light);
}

@media(max-width: 900px) {
    .fluid-scroll-track {
        display: flex;
        overflow-x: auto;
        scroll-snap-type: x mandatory;
        padding-bottom: 2rem;
    }
    .fluid-card-item {
        min-width: 80vw;
        scroll-snap-align: center;
    }
}

/* FEATURES GRID : Color Flip */
.tendon-grid-space {
    padding: var(--pad-spacious) 0;
    background: var(--joint-bg);
}

.tendon-grid-alt-bg {
    background: var(--joint-surface);
}

.tendon-flip-deck {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2rem;
    margin-top: 3rem;
}

.tendon-flip-unit {
    background: var(--joint-surface);
    padding: 3rem;
    border-radius: var(--joint-rad);
    box-shadow: var(--joint-shadow);
    transition: all 0.4s ease;
    cursor: default;
}

.stat-mode {
    text-align: center;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

.huge-display-digit {
    font-family: var(--font-display);
    font-size: 4rem;
    font-weight: 900;
    color: var(--joint-accent);
    margin-bottom: 0.5rem;
    transition: color 0.4s ease;
}

.tendon-icon-ring {
    width: 64px;
    height: 64px;
    border-radius: 50%;
    background: var(--joint-gradient);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.5rem;
    transition: all 0.4s ease;
}

.tendon-unit-head {
    font-size: 1.3rem;
    margin-bottom: 1rem;
    color: var(--joint-ink);
    transition: color 0.4s ease;
}

.tendon-unit-desc {
    color: var(--joint-ink-light);
    transition: color 0.4s ease;
}

.tendon-flip-unit:hover {
    background: var(--joint-gradient);
    color: var(--joint-surface);
    transform: translateY(-5px);
}

.tendon-flip-unit:hover .tendon-unit-head,
.tendon-flip-unit:hover .tendon-unit-desc {
    color: var(--joint-surface);
}

.tendon-flip-unit:hover .tendon-icon-ring {
    background: var(--joint-surface);
    color: var(--joint-ink);
}

.tendon-flip-unit:hover .huge-display-digit {
    color: var(--joint-surface);
}

@media(max-width: 768px) {
    .tendon-flip-deck {
        grid-template-columns: 1fr;
    }
}

/* HOW IT WORKS */
.pathway-process-area {
    padding: var(--pad-spacious) 0;
    background: var(--joint-surface);
}

.pathway-track-line {
    display: flex;
    justify-content: space-between;
    position: relative;
    margin-top: 4rem;
}

.pathway-track-line::before {
    content: '';
    position: absolute;
    top: 35px;
    left: 0;
    width: 100%;
    height: 3px;
    background: var(--joint-ink-light);
    opacity: 0.2;
    z-index: 1;
}

.pathway-step-node {
    flex: 1;
    text-align: center;
    padding: 0 1.5rem;
    position: relative;
    z-index: 2;
}

.pathway-step-digit {
    width: 70px;
    height: 70px;
    background: var(--joint-gradient);
    color: white;
    font-family: var(--font-display);
    font-size: 2rem;
    font-weight: 900;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem auto;
    box-shadow: var(--joint-shadow);
}

.pathway-step-head {
    font-size: 1.2rem;
    color: var(--joint-ink);
    margin-bottom: 0.75rem;
}

.pathway-step-desc {
    color: var(--joint-ink-light);
    font-size: 0.95rem;
}

@media(max-width: 768px) {
    .pathway-track-line {
        flex-direction: column;
        gap: 3rem;
    }
    .pathway-track-line::before {
        top: 0;
        left: 50%;
        width: 3px;
        height: 100%;
        transform: translateX(-50%);
    }
}

/* CTA STRIP */
.action-nexus-strip {
    background: var(--joint-gradient);
    padding: 8dvh 0;
    color: var(--joint-surface);
}

.action-nexus-flex {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 2rem;
}

.action-nexus-head {
    font-size: clamp(1.8rem, 3vw, 2.5rem);
    max-width: 600px;
}

.action-nexus-trigger {
    background: var(--joint-ink);
    color: var(--joint-surface);
    padding: 1.2rem 3rem;
    border-radius: var(--joint-rad);
    font-family: var(--font-display);
    font-weight: 900;
    font-size: 1.1rem;
    letter-spacing: 1px;
    white-space: nowrap;
}

.action-nexus-trigger:hover {
    background: var(--joint-accent);
    transform: translateY(-3px);
    box-shadow: var(--joint-shadow);
}

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

/* EXPERT BIO */
.educator-bio-area {
    padding: var(--pad-spacious) 0;
    background: var(--joint-bg);
}

.educator-bio-flex {
    display: flex;
    align-items: center;
    gap: 4rem;
}

.educator-portrait-box {
    flex: 0 0 40%;
    height: 60vh;
    border-radius: var(--joint-rad);
    background-size: cover;
    background-position: center;
    box-shadow: var(--joint-shadow);
}

.educator-details-text {
    flex: 0 0 55%;
}

.muscle-desc-core {
    font-size: 1.1rem;
    color: var(--joint-ink-light);
    margin-bottom: 1.5rem;
}

@media(max-width: 900px) {
    .educator-bio-flex {
        flex-direction: column;
    }
    .educator-portrait-box {
        width: 100%;
        height: 40vh;
    }
}

/* RESERVE FORM */
.registry-full-zone {
    padding: var(--pad-spacious) 0;
    background: var(--joint-bg);
}

.registry-split-layout {
    display: flex;
    gap: 4rem;
}

.registry-info-wing {
    flex: 0 0 45%;
    position: sticky;
    top: 120px;
    align-self: flex-start;
}

.inline-contact-link {
    color: var(--joint-accent);
    font-weight: 600;
    text-decoration: underline;
}

.info-trust-card {
    background: var(--joint-surface);
    padding: 2rem;
    border-radius: var(--joint-rad);
    box-shadow: var(--joint-shadow);
    margin-top: 2rem;
}

.info-trust-icon {
    color: var(--joint-accent);
    margin-bottom: 1rem;
}

.info-trust-head {
    font-size: 1.2rem;
    margin-bottom: 0.5rem;
}

.info-trust-desc {
    color: var(--joint-ink-light);
    font-size: 0.95rem;
    margin-bottom: 1rem;
}

.info-trust-bullets {
    list-style: none;
}

.info-trust-bullets li {
    position: relative;
    padding-left: 1.5rem;
    margin-bottom: 0.5rem;
    font-size: 0.9rem;
    color: var(--joint-ink-light);
}

.info-trust-bullets li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 6px;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--joint-accent);
}

.registry-form-wing {
    flex: 1;
    background: var(--joint-surface);
    padding: 3.5rem;
    border-radius: var(--joint-rad);
    box-shadow: var(--joint-shadow);
}

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

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

.form-field-input,
.form-field-area {
    width: 100%;
    padding: 1rem;
    border: 1px solid rgba(13, 43, 69, 0.2);
    border-radius: 8px;
    font-family: var(--font-body);
    font-size: 1rem;
    background: var(--joint-bg);
}

.form-field-input:focus,
.form-field-area:focus {
    outline: none;
    border-color: var(--joint-accent);
    box-shadow: 0 0 0 3px rgba(255, 0, 118, 0.1);
}

.form-field-check-group {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    margin-bottom: 2rem;
}

.form-field-check {
    margin-top: 5px;
    width: 18px;
    height: 18px;
}

.form-field-check-label {
    font-size: 0.9rem;
    color: var(--joint-ink-light);
}

.form-field-check-label a {
    color: var(--joint-accent);
    text-decoration: underline;
}

@media(max-width: 900px) {
    .registry-split-layout {
        flex-direction: column;
    }
    .registry-info-wing {
        position: static;
    }
    .registry-form-wing {
        padding: 2rem;
    }
}

/* FAQ ACCORDION (CSS ONLY) */
.faq-accordion-zone {
    padding: 8dvh 0;
    background: var(--joint-bg);
}

.faq-track {
    max-width: 800px;
    margin: 3rem auto 0;
}

.faq-slot {
    background: var(--joint-surface);
    margin-bottom: 1rem;
    padding: 1.5rem 2rem;
    border-radius: var(--joint-rad);
    box-shadow: var(--joint-shadow);
}

.faq-slot-question {
    font-size: 1.1rem;
    color: var(--joint-ink);
    margin-bottom: 0.5rem;
}

.faq-slot-answer {
    color: var(--joint-ink-light);
    font-size: 0.95rem;
}

/* PRIVACY / TERMS */
.legal-doc-zone {
    padding: var(--pad-spacious) 0;
    background: var(--joint-bg);
    min-height: 100vh;
}

.legal-doc-inner {
    background: var(--joint-surface);
    padding: 4rem;
    border-radius: var(--joint-rad);
    box-shadow: var(--joint-shadow);
}

/* FOOTER */
.synovial-base-footer {
    background: var(--joint-ink);
    color: var(--joint-surface);
    padding: 4rem 0;
}

.synovial-footer-inner {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2rem;
    text-align: center;
}

.synovial-footer-brand {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-family: var(--font-display);
    font-size: 1.2rem;
    color: var(--joint-surface);
}

.synovial-footer-links {
    display: flex;
    gap: 2rem;
    font-size: 0.95rem;
}

.synovial-footer-links a:hover {
    color: var(--joint-accent);
}

.synovial-footer-legal {
    font-size: 0.85rem;
    color: rgba(255,255,255,0.6);
    border-top: 1px solid rgba(255,255,255,0.1);
    padding-top: 2rem;
    width: 100%;
}

.synovial-footer-legal p {
    margin-bottom: 0.5rem;
}

@media(max-width: 768px) {
    .synovial-footer-links {
        flex-direction: column;
        gap: 1rem;
    }
}

/* COOKIE BANNER */
.cookie-notify-panel {
    position: fixed;
    bottom: 0;
    left: 0;
    width: 100%;
    background: var(--joint-surface);
    padding: 1.5rem;
    box-shadow: 0 -10px 30px rgba(0,0,0,0.1);
    z-index: 9999;
    display: none;
    justify-content: space-between;
    align-items: center;
    gap: 2rem;
}

.cookie-notify-text {
    color: var(--joint-ink);
    font-weight: 600;
}

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

.cookie-action-btn {
    padding: 0.75rem 1.5rem;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    border: none;
    transition: all 0.3s ease;
}

.cookie-action-btn.accept {
    background: var(--joint-accent);
    color: var(--joint-surface);
}

.cookie-action-btn.decline {
    background: transparent;
    border: 1px solid var(--joint-ink);
    color: var(--joint-ink);
}

@media(max-width: 768px) {
    .cookie-notify-panel {
        flex-direction: column;
        text-align: center;
    }
}