/* ========================================
   0. IMPORTS (Google Fonts)
   ======================================== */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap');

/* ========================================
   1. CUSTOM PROPERTIES (:root)
   ======================================== */
:root {
    /* Paleta de colores */
    --color-bg: #0a0a0f;
    --color-bg-elevated: #12121a;
    --color-bg-surface: #1a1a2e;
    --color-text: #f8fafc;
    --color-text-muted: #94a3b8;
    --color-text-subtle: #64748b;
    --color-accent: #00d4aa;
    --color-accent-hover: #00e8bb;
    --color-accent-glow: rgba(0, 212, 170, 0.15);
    --color-border: rgba(255, 255, 255, 0.08);
    --color-border-hover: rgba(255, 255, 255, 0.15);

    /* Tipografía */
    --font-family: 'Inter', system-ui, -apple-system, sans-serif;
    --font-size-xs: 0.75rem;
    /* 12px */
    --font-size-sm: 0.875rem;
    /* 14px */
    --font-size-base: 1rem;
    /* 16px */
    --font-size-lg: 1.125rem;
    /* 18px */
    --font-size-xl: 1.25rem;
    /* 20px */
    --font-size-2xl: 1.5rem;
    /* 24px */
    --font-size-3xl: 2rem;
    /* 32px */
    --font-size-4xl: 2.5rem;
    /* 40px */
    --font-size-5xl: 3rem;
    /* 48px */
    --font-size-6xl: 4rem;
    /* 64px */

    --font-weight-normal: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;

    --line-height-tight: 1.1;
    --line-height-normal: 1.6;
    --line-height-relaxed: 1.8;

    /* Espaciado */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
    --space-3xl: 4rem;
    --space-4xl: 6rem;
    --space-section: 5rem;

    /* Otros tokens */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-full: 9999px;

    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 400ms ease;

    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 30px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 20px var(--color-accent-glow);

    --max-width: 1200px;
    --header-height: 4rem;
    --z-header: 100;
    --z-modal: 200;
}

/* ========================================
   2. RESET / NORMALIZE
   ======================================== */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

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

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    color: var(--color-text);
    background: var(--color-bg);
    line-height: var(--line-height-normal);
    min-height: 100dvh;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

input,
button,
textarea,
select {
    font: inherit;
}

h1,
h2,
h3,
h4,
h5,
h6 {
    text-wrap: balance;
}

p {
    text-wrap: pretty;
    max-width: 65ch;
}

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

ul,
ol {
    list-style: none;
}

/* ========================================
   3. BASE (html, body, tipografía global)
   ======================================== */
h1,
h2,
h3,
h4,
h5,
h6 {
    font-weight: var(--font-weight-bold);
    line-height: var(--line-height-tight);
    color: var(--color-text);
}

h1 {
    font-size: var(--font-size-5xl);
}

h2 {
    font-size: var(--font-size-3xl);
}

h3 {
    font-size: var(--font-size-xl);
}

p,
li {
    color: var(--color-text-muted);
    line-height: var(--line-height-normal);
}

::selection {
    background: var(--color-accent);
    color: var(--color-bg);
}

/* ========================================
   4. UTILIDADES (.container, .sr-only)
   ======================================== */
.container {
    width: 100%;
    max-width: var(--max-width);
    margin-inline: auto;
    padding-inline: var(--space-md);
}

.sr-only {
    position: absolute !important;
    width: 1px !important;
    height: 1px !important;
    padding: 0 !important;
    margin: -1px !important;
    overflow: hidden !important;
    clip: rect(0, 0, 0, 0) !important;
    white-space: nowrap !important;
    border: 0 !important;
}

/* ========================================
   5. COMPONENTES REUTILIZABLES
   ======================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    padding: 0.875rem 1.75rem;
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-semibold);
    border-radius: var(--radius-md);
    border: 1px solid transparent;
    cursor: pointer;
    transition: all var(--transition-base);
    white-space: nowrap;
}

.btn--primary {
    background: var(--color-accent);
    color: var(--color-bg);
    border-color: var(--color-accent);
}

.btn--primary:hover {
    background: var(--color-accent-hover);
    box-shadow: var(--shadow-glow);
    transform: translateY(-1px);
}

.btn--primary:active {
    transform: translateY(0);
    box-shadow: none;
}

.btn--primary:focus-visible,
.btn--secondary:focus-visible {
    outline: 2px solid var(--color-accent);
    outline-offset: 3px;
}

.btn--secondary {
    background: transparent;
    color: var(--color-text);
    border-color: var(--color-border);
}

.btn--secondary:hover {
    border-color: var(--color-accent);
    color: var(--color-accent);
}

.btn--secondary:active {
    background: var(--color-bg-surface);
}

.btn--sm {
    padding: 0.5rem 1rem;
    font-size: var(--font-size-sm);
}

.card {
    background: var(--color-bg-elevated);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    transition: all var(--transition-base);
}

.card:hover {
    border-color: var(--color-border-hover);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.testimonial {
    border-left: 4px solid var(--color-accent);
    padding-left: var(--space-md);
    font-style: italic;
    color: var(--color-text-muted);
}

.testimonial__name {
    font-weight: var(--font-weight-semibold);
    color: var(--color-text);
    font-style: normal;
}

/* ========================================
   6. LAYOUT — HEADER (.site-header)
   ======================================== */
.site-header {
    position: sticky;
    top: 0;
    z-index: var(--z-header);
    background: rgba(10, 10, 15, 0.85);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--color-border);
    height: var(--header-height);
    display: flex;
    align-items: center;
}

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

.site-header__logo {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    font-weight: var(--font-weight-bold);
    font-size: var(--font-size-lg);
}

.site-header__nav {
    display: none;
    /* Mobile hidden por defecto */
}

.site-header__nav-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.site-header__nav-link {
    color: var(--color-text-muted);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    transition: color var(--transition-fast);
}

.site-header__nav-link:hover {
    color: var(--color-text);
}

.site-header__cta {
    display: none;
    /* Hide on mobile */
}

/* Clases preparadas para menú mobile vía JS */
.site-header__nav.is-open {
    display: block;
    position: absolute;
    top: var(--header-height);
    left: 0;
    width: 100%;
    background: var(--color-bg-surface);
    padding: var(--space-md);
    border-bottom: 1px solid var(--color-border);
}

/* ========================================
   7. LAYOUT — HERO (.hero)
   ======================================== */
.hero {
    min-height: calc(100dvh - var(--header-height));
    display: flex;
    align-items: center;
    padding-block: var(--space-3xl);
}

.hero__container {
    display: flex;
    flex-direction: column;
    gap: var(--space-xl);
}

.hero__content {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.hero__antititle {
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-semibold);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-accent);
}

.hero__title {
    background: linear-gradient(180deg, #ffffff 0%, #94a3b8 100%);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.hero__subtitle {
    font-size: var(--font-size-lg);
    color: var(--color-text-muted);
    max-width: 55ch;
    margin-bottom: var(--space-sm);
}

.hero__ctas {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-md);
    margin-block: var(--space-md);
}

.benefits {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.benefits__item {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    color: var(--color-text-muted);
    font-size: var(--font-size-sm);
}

.hero__trust {
    font-size: var(--font-size-sm);
    color: var(--color-text-subtle);
    margin-top: var(--space-md);
}

.hero__media img {
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
    width: 100%;
}

/* ========================================
   SECCIONES COMUNES
   ======================================== */
.section {
    padding-block: var(--space-section);
}

.section--dark {
    background: var(--color-bg);
}

.section--light {
    background: var(--color-bg-elevated);
}

.section__title {
    text-align: center;
    max-width: 20ch;
    margin-inline: auto;
    margin-bottom: var(--space-2xl);
}

/* ========================================
   8. LAYOUT — PROBLEMA (.section--problema)
   ======================================== */
.section__grid {
    display: grid;
    gap: var(--space-lg);
    grid-template-columns: 1fr;
}

.card__icon {
    font-size: 2rem;
    margin-bottom: var(--space-md);
    display: block;
}

.card__title {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-semibold);
    margin-bottom: var(--space-sm);
    color: var(--color-text);
}

/* ========================================
   9. LAYOUT — SOLUCIÓN (.section--solucion)
   ======================================== */
.section__steps {
    display: flex;
    flex-direction: column;
    gap: var(--space-xl);
    position: relative;
}

.step {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
    position: relative;
    z-index: 1;
}

.step__number {
    font-size: var(--font-size-3xl);
    font-weight: var(--font-weight-bold);
    color: var(--color-accent);
    line-height: 1;
    margin-bottom: var(--space-xs);
}

.step__title {
    font-size: var(--font-size-xl);
}

/* ========================================
   10. LAYOUT — BENEFICIOS (.section--beneficios)
   ======================================== */
.feature-grid {
    display: grid;
    gap: var(--space-lg);
    grid-template-columns: 1fr;
}

.feature-grid__item {
    display: flex;
    flex-direction: column;
}

.feature-grid__icon {
    font-size: 1.5rem;
    margin-bottom: var(--space-sm);
}

.feature-grid__title {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-semibold);
    margin-bottom: var(--space-xs);
    color: var(--color-text);
}

/* ========================================
   11. LAYOUT — PRUEBA SOCIAL (.section--social-proof)
   ======================================== */
.social-proof__testimonials {
    display: grid;
    gap: var(--space-lg);
    grid-template-columns: 1fr;
    margin-bottom: var(--space-3xl);
}

.testimonial__quote {
    font-size: var(--font-size-lg);
    margin-bottom: var(--space-lg);
}

.testimonial__footer {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.testimonial__avatar {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-full);
    object-fit: cover;
}

.testimonial__cite {
    display: flex;
    flex-direction: column;
}

.testimonial__company {
    font-size: var(--font-size-sm);
    font-style: normal;
}

.logo-strip {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    align-items: center;
    gap: var(--space-xl);
}

.logo-strip img {
    opacity: 0.5;
    filter: grayscale(100%);
    transition: all var(--transition-base);
}

.logo-strip img:hover {
    opacity: 1;
    filter: grayscale(0%);
}

/* ========================================
   12. LAYOUT — FAQ (.section--faq)
   ======================================== */
.faq__container {
    max-width: 768px;
    margin-inline: auto;
}

.faq__list {
    display: flex;
    flex-direction: column;
}

.faq__item {
    border-bottom: 1px solid var(--color-border);
}

.faq__item:last-child {
    border-bottom: none;
}

.faq__question {
    cursor: pointer;
    font-weight: var(--font-weight-semibold);
    padding-block: var(--space-md);
    list-style: none;
    /* Hide default triangle */
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: color var(--transition-fast);
}

.faq__question::-webkit-details-marker {
    display: none;
    /* Safari */
}

.faq__question::after {
    content: "+";
    color: var(--color-text-muted);
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-normal);
    transition: transform var(--transition-base);
}

details[open] .faq__question::after {
    transform: rotate(45deg);
    color: var(--color-text);
}

details[open] .faq__answer {
    padding-bottom: var(--space-lg);
    color: var(--color-text-muted);
    line-height: var(--line-height-relaxed);
}

/* ========================================
   13. LAYOUT — CTA FINAL (.section--cta)
   ======================================== */
.section--cta {
    position: relative;
    text-align: center;
    overflow: hidden;
}

.section--cta::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 100%;
    height: 100%;
    max-width: 600px;
    background: radial-gradient(circle, var(--color-accent-glow) 0%, transparent 60%);
    pointer-events: none;
    z-index: 0;
}

.cta__container {
    position: relative;
    z-index: 1;
}

.cta__subtitle {
    margin-inline: auto;
    margin-bottom: var(--space-xl);
}

.cta__actions {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--space-md);
}

/* ========================================
   14. LAYOUT — FOOTER (.site-footer)
   ======================================== */
.site-footer {
    padding-block: var(--space-2xl);
    border-top: 1px solid var(--color-border);
}

.site-footer__container {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-lg);
}

.site-footer__copyright {
    font-size: var(--font-size-sm);
    color: var(--color-text-subtle);
}

.site-footer__nav-list {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-md);
}

.site-footer__nav-link {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
    transition: color var(--transition-fast);
}

.site-footer__nav-link:hover {
    color: var(--color-text);
}

.site-footer__social {
    display: flex;
    gap: var(--space-md);
}

.site-footer__social-link {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
    transition: color var(--transition-fast);
}

.site-footer__social-link:hover {
    color: var(--color-text);
}

/* ========================================
   15. MEDIA QUERIES (breakpoints ascendentes)
   ======================================== */
/* Tablet Pequeña */
@media (min-width: 640px) {
    .site-header__nav-list {
        flex-direction: row;
    }

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

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

    .site-footer__container {
        flex-direction: row;
        justify-content: space-between;
    }

    .site-footer__nav-list {
        flex-direction: row;
    }
}

/* Tablet / Desktop Pequeño */
@media (min-width: 768px) {
    :root {
        --space-section: 6.5rem;
    }

    .site-header__nav {
        display: block;
    }

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

    .hero__container {
        flex-direction: row;
        align-items: center;
    }

    .hero__content {
        flex: 0 0 60%;
        padding-right: var(--space-xl);
    }

    .hero__media {
        flex: 1;
    }

    .benefits {
        flex-direction: row;
        gap: var(--space-lg);
    }

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

    .section__steps {
        flex-direction: row;
    }

    .section__steps::before {
        content: '';
        position: absolute;
        top: 1.25rem;
        left: 2rem;
        right: 2rem;
        height: 1px;
        background: var(--color-border);
        z-index: 0;
    }

    .step {
        flex: 1;
        background: var(--color-bg);
        padding-right: var(--space-md);
    }
}

/* Desktop */
@media (min-width: 1024px) {
    :root {
        --space-section: 8rem;
        --font-size-3xl: var(--font-size-4xl);
        --font-size-5xl: var(--font-size-6xl);
        --font-size-xl: var(--font-size-2xl);
    }

    .container {
        padding-inline: var(--space-xl);
    }

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

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

/* ========================================
   16. ACCESIBILIDAD Y MOTION
   ======================================== */
:focus-visible {
    outline: 2px solid var(--color-accent);
    outline-offset: 3px;
}

@media (prefers-reduced-motion: reduce) {

    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}

@media (prefers-contrast: more) {
    :root {
        --color-border: rgba(255, 255, 255, 0.4);
        --color-text-muted: #e2e8f0;
        --color-text-subtle: #cbd5e1;
    }
}

/* ========================================
   17. PRINT
   ======================================== */
@media print {

    .site-header,
    .site-footer,
    .hero__media,
    .hero__ctas,
    .hero__trust,
    .cta__actions,
    .logo-strip,
    .btn,
    .site-header__nav {
        display: none !important;
    }

    body {
        background: #fff !important;
        color: #000 !important;
    }

    h1,
    h2,
    h3,
    h4,
    h5,
    h6,
    p,
    li,
    span,
    div {
        color: #000 !important;
    }

    a {
        color: #000 !important;
        text-decoration: underline !important;
    }

    a[href]::after {
        content: " (" attr(href) ")";
        font-size: var(--font-size-sm);
    }

    .section {
        padding-block: var(--space-xl) !important;
        background: #fff !important;
        page-break-inside: avoid;
    }

    .card,
    .step,
    .feature-grid__item,
    .testimonial,
    .faq__item {
        border: 1px solid #ccc !important;
        page-break-inside: avoid;
        break-inside: avoid;
    }

    details[open] .faq__answer {
        display: block !important;
    }
}

/* ========================================
   ADDITIONS — Cachita Systems v2
   ======================================== */

/* --- Language Toggle Button --- */
.site-header__actions {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.lang-toggle {
    background: transparent;
    border: 1px solid var(--color-border);
    color: var(--color-text-muted);
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-semibold);
    letter-spacing: 0.05em;
    padding: 0.3rem 0.6rem;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition-fast);
    line-height: 1;
}

.lang-toggle:hover {
    border-color: var(--color-accent);
    color: var(--color-accent);
}

.lang-toggle:focus-visible {
    outline: 2px solid var(--color-accent);
    outline-offset: 2px;
}

/* --- Hamburger Menu Icon --- */
.site-header__menu-toggle {
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 2rem;
    height: 2rem;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 0;
}

.site-header__menu-toggle span {
    display: block;
    width: 100%;
    height: 2px;
    background: var(--color-text-muted);
    border-radius: 2px;
    transition: all var(--transition-base);
}

.site-header__menu-toggle:hover span {
    background: var(--color-text);
}

@media (min-width: 768px) {
    .site-header__menu-toggle {
        display: none;
    }

    .site-header__actions {
        gap: var(--space-sm);
    }
}

/* --- Chat Mockup (Hero Media) --- */
.hero__media {
    flex: 1;
}

.chat-mockup {
    background: var(--color-bg-elevated);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-lg), 0 0 40px rgba(0, 212, 170, 0.08);
    max-width: 360px;
    margin-inline: auto;
}

.chat-mockup__header {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-md);
    background: var(--color-bg-surface);
    border-bottom: 1px solid var(--color-border);
}

.chat-mockup__avatar {
    width: 36px;
    height: 36px;
    border-radius: var(--radius-full);
    overflow: hidden;
    flex-shrink: 0;
}

.chat-mockup__name {
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-semibold);
    color: var(--color-text);
    line-height: 1.2;
}

.chat-mockup__status {
    font-size: var(--font-size-xs);
    color: var(--color-accent);
}

.chat-mockup__body {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
    padding: var(--space-md);
    min-height: 220px;
}

.chat-bubble {
    display: flex;
    flex-direction: column;
    gap: 2px;
    max-width: 85%;
    font-size: var(--font-size-sm);
    line-height: 1.4;
    color: var(--color-text);
    animation: bubbleIn 0.3s ease forwards;
}

@keyframes bubbleIn {
    from {
        opacity: 0;
        transform: translateY(6px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.chat-bubble--in {
    align-self: flex-start;
    background: var(--color-bg-surface);
    border: 1px solid var(--color-border);
    border-radius: 0 var(--radius-lg) var(--radius-lg) var(--radius-lg);
    padding: 0.5rem 0.75rem;
}

.chat-bubble--out {
    align-self: flex-end;
    background: #005c4b;
    border-radius: var(--radius-lg) 0 var(--radius-lg) var(--radius-lg);
    padding: 0.5rem 0.75rem;
}

.chat-bubble__badge {
    font-size: 0.65rem;
    font-weight: var(--font-weight-semibold);
    color: var(--color-accent);
    letter-spacing: 0.04em;
    display: block;
    margin-bottom: 2px;
}

.chat-bubble__time {
    font-size: 0.65rem;
    color: rgba(255, 255, 255, 0.35);
    align-self: flex-end;
    margin-top: 2px;
}

.chat-mockup__footer {
    text-align: center;
    font-size: var(--font-size-xs);
    color: var(--color-text-subtle);
    padding: var(--space-sm) var(--space-md);
    border-top: 1px solid var(--color-border);
    background: var(--color-bg-surface);
    font-style: italic;
}

/* --- Testimonial Avatar Initials --- */
.testimonial__avatar-initials {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-full);
    background: var(--color-bg-surface);
    border: 1px solid var(--color-border);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-bold);
    color: var(--color-accent);
    flex-shrink: 0;
    letter-spacing: 0.03em;
}

/* --- Noscript Message --- */
.noscript-message {
    background: var(--color-bg-elevated);
    color: var(--color-text-muted);
    text-align: center;
    padding: var(--space-md);
    font-size: var(--font-size-sm);
    border-bottom: 1px solid var(--color-border);
}

/* --- Header hidden state (already in original, ensure transition) --- */
.site-header {
    transition: transform 300ms ease, background 200ms ease;
}

.site-header.is-hidden {
    transform: translateY(-100%);
}

/* Social icon SVG sizing fix */
.site-footer__social-link svg {
    display: block;
    border-radius: 4px;
    transition: opacity var(--transition-fast), transform var(--transition-fast);
}

.site-footer__social-link:hover svg {
    opacity: 0.85;
    transform: translateY(-2px);
}