/* ============================================================
   HealthNeuropathy — Pure CSS Design System
   Replaces Tailwind CSS CDN for maximum performance
   ============================================================ */

/* --- CSS VARIABLES (Design Tokens) --- */
:root {
    --brand-blue: #0047AB;
    --brand-blue-dark: #003580;
    --deep-navy: #0a192f;
    --dark-navy-alt: #081221;
    --dark-navy-deepest: #040a15;
    --soft-blue: #63b3ed;
    --bg-neutral: #ffffff;
    --bg-editorial-gray: #e9ecef;
    --bg-slate-50: #f8fafc;
    --alert-red: #cc0000;
    --green-cta: #22c55e;
    --green-cta-hover: #16a34a;
    --text-primary: #1e293b;
    --text-secondary: #334155;
    --text-muted: #64748b;
    --text-light: #94a3b8;
    --text-faint: #cbd5e1;
    --border-light: #e2e8f0;
    --border-lighter: #f1f5f9;
    --blue-50: #eff6ff;
    --blue-100: #dbeafe;
    --blue-200: #bfdbfe;
    --blue-300: #93c5fd;
    --blue-400: #60a5fa;
    --blue-700: #1d4ed8;
    --blue-900: #1e3a5f;
    --blue-950: #172554;
    --slate-100: #f1f5f9;
    --slate-200: #e2e8f0;
    --slate-300: #cbd5e1;
    --slate-400: #94a3b8;
    --slate-500: #64748b;
    --slate-600: #475569;
    --slate-700: #334155;
    --slate-800: #1e293b;
    --slate-900: #0f172a;
    --slate-950: #020617;
    --yellow-400: #facc15;
    --red-600: #dc2626;
    --red-700: #b91c1c;
    --white: #ffffff;
}

/* --- RESET & BASE --- */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    -webkit-text-size-adjust: 100%;
    scroll-behavior: smooth;
}

body {
    font-family: 'Source Sans 3', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    font-size: 20px;
    background-color: var(--bg-neutral);
    color: var(--text-primary);
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

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

ul,
ol {
    list-style: none;
}

/* --- TYPOGRAPHY --- */
h1,
h2,
h3 {
    font-family: 'Merriweather', Georgia, serif;
    line-height: 1.2;
}

.font-formal {
    font-family: 'Merriweather', Georgia, serif;
    font-style: italic;
    font-weight: 400;
    color: var(--text-secondary);
}

.text-uppercase {
    text-transform: uppercase;
}

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

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

.font-black {
    font-weight: 900;
}

.font-bold {
    font-weight: 700;
}

.font-semibold {
    font-weight: 600;
}

.font-medium {
    font-weight: 500;
}

.italic {
    font-style: italic;
}

/* --- LAYOUT --- */
.container {
    width: 100%;
    max-width: 1280px;
    margin-left: auto;
    margin-right: auto;
    padding-left: 1rem;
    padding-right: 1rem;
}

.max-w-2xl {
    max-width: 672px;
    margin-left: auto;
    margin-right: auto;
}

.max-w-3xl {
    max-width: 768px;
    margin-left: auto;
    margin-right: auto;
}

.max-w-4xl {
    max-width: 896px;
    margin-left: auto;
    margin-right: auto;
}

.max-w-5xl {
    max-width: 1024px;
    margin-left: auto;
    margin-right: auto;
}

.max-w-6xl {
    max-width: 1152px;
    margin-left: auto;
    margin-right: auto;
}

.flex {
    display: flex;
}

.flex-col {
    flex-direction: column;
}

.flex-wrap {
    flex-wrap: wrap;
}

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

.items-start {
    align-items: start;
}

.items-stretch {
    align-items: stretch;
}

.justify-center {
    justify-content: center;
}

.justify-between {
    justify-content: space-between;
}

.gap-2 {
    gap: 0.5rem;
}

.gap-3 {
    gap: 0.75rem;
}

.gap-4 {
    gap: 1rem;
}

.gap-5 {
    gap: 1.25rem;
}

.gap-6 {
    gap: 1.5rem;
}

.gap-8 {
    gap: 2rem;
}

.gap-10 {
    gap: 2.5rem;
}

.gap-14 {
    gap: 3.5rem;
}

.grid {
    display: grid;
}

.shrink-0 {
    flex-shrink: 0;
}

.relative {
    position: relative;
}

.absolute {
    position: absolute;
}

.overflow-hidden {
    overflow: hidden;
}

.block {
    display: block;
}

.inline-flex {
    display: inline-flex;
}

.w-full {
    width: 100%;
}

.mx-auto {
    margin-left: auto;
    margin-right: auto;
}

/* --- SECTION SPACING --- */
.section-spacing {
    padding: 90px 0;
}

.bg-fold-gray {
    background-color: var(--bg-editorial-gray);
}

/* --- SECURE TOP BAR --- */
.secure-bar {
    background-color: var(--slate-950);
    color: var(--white);
    padding: 4px 1rem;
}

.secure-bar-inner {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 0.5rem;
    font-size: 8px;
    font-weight: 900;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    text-align: center;
}

.secure-bar-inner svg {
    width: 10px;
    height: 10px;
    color: var(--blue-400);
    fill: currentColor;
}

.secure-bar--warning {
    background-color: var(--red-700);
}

.secure-bar--warning .secure-bar-inner {
    font-size: 10px;
    letter-spacing: 0.1em;
    animation: pulse 2s cubic-bezier(0.4, 0, 0.6, 1) infinite;
}

/* Alternate nav style for legal pages */
.secure-nav {
    background-color: var(--slate-900);
    color: var(--white);
    padding: 0.5rem 0;
    text-align: center;
    font-size: 10px;
    font-weight: 900;
    text-transform: uppercase;
    letter-spacing: 0.15em;
}

.secure-nav-inner {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.secure-nav-inner svg {
    width: 12px;
    height: 12px;
    color: #4ade80;
    fill: currentColor;
}

/* --- HEADER --- */
.site-header {
    background-color: var(--white);
    border-bottom: 1px solid var(--border-light);
    padding: 0.5rem 0;
    position: sticky;
    top: 0;
    z-index: 50;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
}

.site-header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.25rem;
    font-weight: 900;
    color: var(--slate-900);
    letter-spacing: -0.05em;
}

.logo-accent {
    color: var(--blue-700);
    text-decoration: underline;
    text-decoration-color: #2563eb;
    text-underline-offset: 4px;
    text-decoration-thickness: 2px;
}

.header-badges {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    filter: grayscale(1);
    opacity: 0.4;
}

.header-badges img {
    height: 12px;
}

/* Legal page header variant */
.site-header--legal {
    padding: 1.5rem 0;
    position: static;
    box-shadow: none;
}

.site-header--legal .container {
    max-width: 896px;
    flex-direction: column;
    gap: 1rem;
}

.site-header--legal .header-badges {
    opacity: 0.7;
    gap: 1.5rem;
    transition: filter 0.3s ease;
}

.site-header--legal .header-badges:hover {
    filter: grayscale(0);
}

/* --- BUTTONS --- */
.btn-pill {
    background-color: var(--brand-blue);
    color: var(--white);
    padding: 14px 24px;
    border-radius: 9999px;
    font-weight: 800;
    font-size: clamp(12px, 3.8vw, 22px);
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    box-shadow: 0 6px 15px rgba(0, 71, 171, 0.2);
    text-align: center;
    border: none;
    cursor: pointer;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    white-space: normal;
    line-height: 1.2;
    max-width: 95%;
    width: fit-content;
    word-wrap: break-word;
}

.btn-pill:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 30px rgba(0, 71, 171, 0.35);
    background-color: var(--brand-blue-dark);
}

.btn-pill--white {
    background-color: var(--white);
    color: var(--blue-900);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.15);
}

.btn-pill--white:hover {
    background-color: var(--blue-50);
    transform: scale(1.05);
}

.btn-pill--green {
    background-color: var(--green-cta);
    border-radius: 12px;
    padding: 18px 32px;
    font-size: clamp(16px, 4vw, 24px);
    flex-direction: column;
    box-shadow: 0 10px 25px rgba(34, 197, 94, 0.3);
    width: 100%;
    max-width: 600px;
}

.btn-pill--green:hover {
    transform: scale(1.02);
    background-color: var(--green-cta-hover);
    box-shadow: 0 15px 35px rgba(34, 197, 94, 0.4);
}

.btn-pill--green .btn-sub {
    font-size: 12px;
    opacity: 0.8;
    margin-top: 4px;
    font-weight: 400;
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

/* --- VSL FRAME (Index page) --- */
.vsl-frame {
    position: relative;
    background-image: linear-gradient(rgba(0, 0, 0, 0.1), rgba(0, 0, 0, 0.35)), url('../images/thumb-vsl.webp');
    background-size: cover;
    background-position: center;
    aspect-ratio: 16/9;
    border-radius: 20px;
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.15);
    border: 4px solid var(--white);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: opacity 0.3s ease;
}

.vsl-frame:hover {
    opacity: 0.95;
}

.play-btn {
    width: 56px;
    height: 56px;
    background-color: var(--brand-blue);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.3);
    transition: transform 0.3s ease;
    border: 4px solid rgba(255, 255, 255, 0.1);
}

.vsl-frame:hover .play-btn {
    transform: scale(1.1);
}

.play-btn svg {
    width: 28px;
    height: 28px;
    fill: var(--white);
    margin-left: 3px;
}

/* --- VSL CONTAINER (VSL page) --- */
.vsl-container {
    background: #000;
    border-radius: 8px;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
    overflow: hidden;
    border: 1px solid var(--slate-700);
}

/* --- HIGHLIGHT SIDEBAR --- */
.highlight-sidebar {
    border-left: 5px solid var(--brand-blue);
    padding-left: 24px;
    font-style: normal;
}

/* --- IMPACT BOXES --- */
.impact-box {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 24px;
    padding: 30px;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.impact-icon {
    width: 56px;
    height: 56px;
    background-color: var(--alert-red);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 900;
    font-size: 1.5rem;
    flex-shrink: 0;
    color: var(--white);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

/* --- GRID STAGES --- */
.grid-box {
    transition: all 0.3s ease;
    border: 1px solid rgba(255, 255, 255, 0.1);
    background: rgba(255, 255, 255, 0.05);
    padding: 1.5rem;
    border-radius: 1rem;
}

.grid-box.featured {
    background: rgba(30, 78, 255, 0.15);
    border: 2px solid rgba(0, 71, 171, 0.4);
    transform: scale(1.02);
    z-index: 10;
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.25);
}

/* --- FAQ ACCORDION --- */
details summary {
    list-style: none;
    cursor: pointer;
    outline: none;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

details summary::-webkit-details-marker {
    display: none;
}

details[open] summary svg {
    transform: rotate(180deg);
}

.faq-item {
    background-color: var(--bg-editorial-gray);
    border: 1px solid var(--border-light);
    border-radius: 12px;
    overflow: hidden;
    transition: background-color 0.3s ease;
}

.faq-item:hover {
    background-color: var(--white);
}

.faq-item summary {
    padding: 1.5rem;
    font-weight: 900;
    font-size: 1.125rem;
    color: var(--blue-950);
    padding-right: 3rem;
    position: relative;
    line-height: 1.3;
    text-transform: uppercase;
}

.faq-item summary svg {
    width: 16px;
    height: 16px;
    position: absolute;
    right: 1.5rem;
    color: var(--blue-400);
    transition: transform 0.3s ease;
    fill: none;
    stroke: currentColor;
}

.faq-answer {
    padding: 1.5rem;
    padding-top: 0;
    color: var(--slate-700);
    font-size: 1.125rem;
    border-top: 1px solid var(--slate-300);
    font-weight: 500;
    line-height: 1.6;
}

/* VSL page FAQ variant */
.faq-item--simple {
    border: 1px solid var(--border-light);
    border-radius: 12px;
    padding: 1rem;
    background: var(--white);
}

.faq-item--simple summary {
    font-weight: 700;
    cursor: pointer;
    list-style: none;
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: var(--slate-900);
    padding: 0;
    text-transform: uppercase;
    font-size: 1rem;
}

.faq-item--simple summary .faq-arrow {
    color: var(--blue-400);
    transition: transform 0.3s ease;
}

.faq-item--simple[open] .faq-arrow {
    transform: rotate(180deg);
}

.faq-item--simple p {
    margin-top: 1rem;
    color: var(--slate-600);
}

/* --- REVIEW CARDS --- */
.review-card {
    background: var(--white);
    padding: 1.5rem;
    border-radius: 16px;
    border: 1px solid var(--border-light);
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05);
    text-align: left;
    display: flex;
    flex-direction: column;
}

.review-stars {
    color: var(--yellow-400);
    font-size: 12px;
    margin-bottom: 1rem;
}

.avatar-circle {
    width: 52px;
    height: 52px;
    background-color: var(--slate-100);
    border-radius: 9999px;
    flex-shrink: 0;
    overflow: hidden;
    border: 2px solid var(--white);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.avatar-circle img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

/* --- GUARANTEE SECTION --- */
.guarantee-box {
    background-color: var(--bg-slate-50);
    padding: 2rem;
    border-radius: 1.5rem;
    border: 2px dashed var(--blue-200);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.08);
}

.guarantee-box img {
    width: 96px;
    height: 96px;
    margin: 0 auto 1.5rem;
    opacity: 0.8;
}

/* --- LEGAL PAGE CONTENT --- */
.legal-card {
    max-width: 672px;
    margin: 0 auto;
    background: var(--white);
    border: 1px solid var(--border-light);
    border-radius: 1.5rem;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.04);
    padding: 2rem;
}

.legal-content h2:not(:first-of-type) {
    border-top: 1px solid var(--border-light);
    padding-top: 1.5rem;
}

.legal-content ul {
    list-style: disc;
    margin-left: 1.5rem;
}

.legal-content ul li {
    margin-bottom: 0.25rem;
}

.legal-disclaimer-box {
    margin-top: 4rem;
    background-color: var(--blue-50);
    border: 1px solid var(--blue-100);
    border-radius: 1rem;
    padding: 1.5rem 2rem;
    font-size: 10px;
    font-weight: 600;
    color: var(--slate-500);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    line-height: 2;
    text-align: center;
}

/* --- FOOTER --- */
.site-footer {
    background-color: var(--dark-navy-deepest);
    color: var(--slate-600);
    padding: 2.5rem 0 3rem;
    text-align: center;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.footer-logo {
    font-size: 1.5rem;
    font-weight: 900;
    color: var(--white);
    margin-bottom: 2rem;
    letter-spacing: -0.05em;
    opacity: 0.8;
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.footer-nav {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 2.5rem;
    font-size: 11px;
    font-weight: 900;
    text-transform: uppercase;
    letter-spacing: 0.2em;
    margin-bottom: 2rem;
}

.footer-nav a {
    transition: color 0.3s ease;
}

.footer-nav a:hover {
    color: var(--blue-400);
}

.footer-copyright {
    color: var(--slate-800);
    font-size: 10px;
    text-transform: uppercase;
    letter-spacing: 0.6em;
    font-weight: 900;
    margin-bottom: 1.5rem;
}

.footer-disclaimer {
    max-width: 896px;
    margin: 0 auto;
    font-size: 9px;
    color: var(--slate-800);
    line-height: 1.8;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    font-weight: 900;
    opacity: 0.6;
    padding: 0 1.5rem;
    text-align: center;
}

/* Legal page footer variant */
.site-footer--legal {
    background-color: var(--bg-slate-50);
    border-top: 1px solid var(--border-light);
    padding: 3rem 0 2rem;
}

.site-footer--legal .footer-logo {
    color: var(--slate-900);
    opacity: 1;
    font-size: 1.25rem;
}

.site-footer--legal .footer-copyright {
    color: var(--slate-400);
    font-size: 12px;
    letter-spacing: 0.1em;
}

.site-footer--legal .footer-disclaimer {
    color: var(--slate-400);
    opacity: 1;
    font-size: 10px;
}

.site-footer--legal .footer-nav {
    font-size: 12px;
    font-weight: 600;
    color: var(--slate-500);
    letter-spacing: 0.05em;
}

.site-footer--legal .footer-nav a:hover {
    color: var(--brand-blue);
}

.footer-nav a.active {
    color: var(--brand-blue);
}

/* VSL page footer */
.site-footer--vsl {
    background-color: var(--slate-950);
    color: var(--slate-500);
    padding: 3rem 0;
    font-size: 12px;
}

/* --- SECTIONS (Dark backgrounds) --- */
.section-dark {
    background-color: var(--deep-navy);
    color: var(--white);
}

.section-darker {
    background-color: var(--dark-navy-alt);
    color: var(--white);
}

.section-darkest {
    background-color: var(--dark-navy-deepest);
    color: var(--white);
}

/* --- ANIMATIONS --- */
@keyframes pulse {

    0%,
    100% {
        opacity: 1;
    }

    50% {
        opacity: 0.5;
    }
}

.animate-pulse {
    animation: pulse 2s cubic-bezier(0.4, 0, 0.6, 1) infinite;
}

@keyframes bounce {

    0%,
    100% {
        transform: translateY(-5%);
        animation-timing-function: cubic-bezier(0.8, 0, 1, 1);
    }

    50% {
        transform: translateY(0);
        animation-timing-function: cubic-bezier(0, 0, 0.2, 1);
    }
}

.animate-bounce {
    animation: bounce 1s infinite;
}

/* --- UTILITY BACKGROUNDS --- */
.bg-white {
    background-color: var(--white);
}

.bg-slate-50 {
    background-color: var(--bg-slate-50);
}

.bg-slate-900 {
    background-color: var(--slate-900);
}

/* --- RESPONSIVE: DESKTOP --- */
@media (min-width: 768px) {
    .container {
        padding-left: 1.5rem;
        padding-right: 1.5rem;
    }

    .secure-bar-inner {
        font-size: 10px;
    }

    .site-header {
        padding: 1rem 0;
    }

    .logo {
        font-size: 1.5rem;
    }

    .logo-accent {
        text-decoration-thickness: 4px;
    }

    .header-badges img {
        height: 16px;
    }

    .header-badges {
        gap: 1rem;
    }

    .site-header--legal .container {
        flex-direction: row;
    }

    .btn-pill {
        padding: 22px 60px;
        font-size: 20px;
        max-width: 100%;
        white-space: nowrap;
    }

    .btn-pill.btn-wrap-desktop {
        white-space: normal;
        max-width: 700px;
    }

    .play-btn {
        width: 96px;
        height: 96px;
    }

    .play-btn svg {
        width: 48px;
        height: 48px;
        margin-left: 6px;
    }

    .grid-3 {
        grid-template-columns: repeat(3, 1fr);
    }

    .md-flex-row {
        flex-direction: row;
    }

    .md-w-5-12 {
        width: 41.666%;
    }

    .md-w-6-12 {
        width: 50%;
    }

    .md-w-7-12 {
        width: 58.333%;
    }

    .md-gap-16 {
        gap: 4rem;
    }

    .md-block {
        display: block;
    }

    .md-hidden {
        display: none;
    }

    .md-justify-start {
        justify-content: flex-start;
    }

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

    .section-spacing {
        padding: 90px 0;
    }

    .legal-card {
        padding: 3rem;
    }

    .guarantee-box {
        padding: 3rem;
    }
}

/* --- RESPONSIVE: MOBILE --- */
@media (max-width: 767px) {
    body {
        font-size: 18px;
        line-height: 1.6;
    }

    .section-spacing {
        padding: 45px 0;
    }

    .site-header {
        padding-top: 6px;
        padding-bottom: 6px;
    }

    h1 {
        font-size: clamp(22px, 6.8vw, 34px);
        font-weight: 900;
    }

    .hero-subheadline {
        font-size: 15px;
        line-height: 1.3;
    }

    .hero-intro {
        font-size: 14px;
        line-height: 1.4;
        color: var(--slate-600);
    }

    .mobile-p {
        font-size: 16px;
        line-height: 1.6;
    }

    .grid-box.featured {
        transform: none;
        margin: 15px 0;
    }

    .highlight-sidebar {
        padding-left: 16px;
        border-left-width: 4px;
    }

    .vsl-container {
        border-radius: 0;
        margin-left: -1rem;
        margin-right: -1rem;
    }

    .hidden-mobile {
        display: none;
    }

    .mobile-stack {
        flex-direction: column;
    }
}

/* --- SPECIFIC PAGE STYLES --- */

/* Hero Title */
.hero-title {
    font-size: clamp(22px, 6.8vw, 52px);
    color: var(--brand-blue-dark);
    font-weight: 900;
    line-height: 1.1;
    letter-spacing: -0.02em;
    text-transform: uppercase;
}

/* Stage Numbers */
.stage-number {
    font-size: 2.5rem;
    font-weight: 900;
    opacity: 0.05;
    font-style: italic;
    margin-bottom: 1rem;
    color: var(--white);
}

/* Dr Image Placeholder */
.dr-image-placeholder {
    width: 56px;
    height: 56px;
    border-radius: 50%;
    border: 2px solid #2563eb;
    overflow: hidden;
    background-color: var(--slate-100);
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    position: relative;
}

/* Narrative image placeholder */
.narrative-image {
    aspect-ratio: 3/4;
    background: var(--white);
    border-radius: 1rem;
    border: 1px solid var(--slate-300);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.08);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

/* Signal plot placeholder */
.signal-plot {
    background: var(--white);
    padding: 12px;
    border-radius: 1rem;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
    border: 1px solid var(--border-light);
}

.signal-plot-inner {
    aspect-ratio: 16/11;
    background: var(--bg-slate-50);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px dashed var(--border-light);
    color: var(--slate-400);
    font-weight: 900;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    font-size: 8px;
    opacity: 0.4;
    font-style: italic;
    text-align: center;
    padding: 0.5rem;
}

/* Final CTA glow */
.cta-glow {
    position: absolute;
    bottom: -256px;
    left: -256px;
    width: 500px;
    height: 500px;
    background: #2563eb;
    border-radius: 50%;
    filter: blur(140px);
    opacity: 0.06;
}

/* CTA awareness box */
.awareness-box {
    background: rgba(30, 58, 138, 0.1);
    padding: 1.5rem;
    border-radius: 1rem;
    border: 1px solid rgba(59, 130, 246, 0.1);
}

/* Delayed CTA */
#delayed-cta {
    display: none;
}

/* Footer badges */
.footer-badges {
    display: flex;
    justify-content: center;
    gap: 3.5rem;
    opacity: 0.2;
    filter: invert(1) grayscale(1);
}

.footer-badges img {
    height: 40px;
}

/* Payment badges */
.payment-badges {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-top: 1rem;
    opacity: 0.6;
}

.payment-badges img {
    height: 16px;
}

/* Link with underline style */
.link-underline {
    color: var(--blue-400);
    font-weight: 700;
    border-bottom: 2px solid var(--blue-400);
    padding-bottom: 2px;
    transition: color 0.3s ease;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    font-size: 14px;
}

.link-underline:hover {
    color: var(--blue-300);
}

/* --- DESKTOP MEDIA QUERIES FOR SPECIFIC COMPONENTS --- */
@media (min-width: 768px) {
    .stage-number {
        font-size: 4rem;
        margin-bottom: 1.5rem;
    }

    .dr-image-placeholder {
        width: 80px;
        height: 80px;
    }

    .faq-answer {
        font-size: 1.25rem;
    }
}

/* --- LOGO LINK --- */
.logo-link {
    display: inline-flex;
    align-items: center;
    text-decoration: none;
    transition: opacity 0.3s ease;
}

.logo-link:hover {
    opacity: 0.75;
}

/* --- FLOATING BACK BUTTON --- */
.fab-home {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    z-index: 100;
    width: 52px;
    height: 52px;
    background: var(--brand-blue);
    color: var(--white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 6px 20px rgba(0, 71, 171, 0.35);
    transition: all 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    text-decoration: none;
    border: 2px solid rgba(255, 255, 255, 0.2);
}

.fab-home:hover {
    transform: translateY(-3px) scale(1.08);
    box-shadow: 0 10px 30px rgba(0, 71, 171, 0.45);
    background: var(--brand-blue-dark);
}

.fab-home svg {
    width: 22px;
    height: 22px;
    fill: none;
    stroke: currentColor;
    stroke-width: 2.5;
    stroke-linecap: round;
    stroke-linejoin: round;
}

@media (max-width: 767px) {
    .fab-home {
        width: 46px;
        height: 46px;
        bottom: 1.25rem;
        right: 1.25rem;
    }

    .fab-home svg {
        width: 20px;
        height: 20px;
    }
}