/* ============================================================
   COMPONENT LIBRARY — Light + Dark Section Hybrid
   ============================================================ */

/* ═══════ NAVIGATION ═══════ */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--nav-height);
    z-index: var(--z-nav);
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--bg-border);
    transition: all var(--transition-base);
}

.nav.scrolled {
    box-shadow: var(--shadow-card);
    background: rgba(255, 255, 255, 0.98);
}

.nav.nav--dark {
    background: rgba(39, 19, 43, 0.9);
    border-bottom-color: var(--bg-dark-border);
}

.nav__inner {
    max-width: var(--max-width);
    margin: 0 auto;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 var(--space-lg);
    gap: var(--space-md);
}

.nav__logo {
    display: flex;
    align-items: center;
    text-decoration: none;
    flex-shrink: 0;
}

.nav__logo img {
    height: 36px;
    width: auto;
}

.nav__links {
    display: flex;
    align-items: center;
    gap: 0;
    list-style: none;
    padding: 0;
    margin: 0;
}

.nav__link {
    display: inline-flex;
    align-items: center;
    padding: 8px 16px;
    font-size: var(--fs-caption);
    font-weight: var(--fw-medium);
    color: var(--text-body);
    text-transform: uppercase;
    letter-spacing: var(--ls-wider);
    transition: color var(--transition-fast);
    white-space: nowrap;
    text-decoration: none;
}

.nav__link:hover,
.nav__link.active {
    color: var(--brand-navy);
}

/* Dropdown */
.nav__dropdown {
    position: relative;
}

.nav__dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    min-width: 240px;
    background: var(--bg-primary);
    border: 1px solid var(--bg-border);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-elevated);
    padding: var(--space-xs) 0;
    opacity: 0;
    visibility: hidden;
    transform: translateY(4px);
    transition: all var(--transition-fast);
    list-style: none;
    z-index: var(--z-nav);
}

.nav__dropdown:hover .nav__dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.nav__dropdown-item {
    display: block;
    padding: 10px 20px;
    font-size: var(--fs-caption);
    color: var(--text-body);
    transition: all var(--transition-fast);
    text-decoration: none;
}

.nav__dropdown-item:hover {
    background: var(--bg-secondary);
    color: var(--brand-navy);
}

/* Language switcher */
.nav__lang {
    display: flex;
    align-items: center;
    gap: 2px;
    margin-left: var(--space-sm);
}

.nav__lang-btn {
    padding: 4px 10px;
    font-size: var(--fs-small);
    font-weight: var(--fw-medium);
    color: var(--text-secondary);
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
    text-decoration: none;
}

.nav__lang-btn.active {
    background: var(--brand-navy);
    color: #FFFFFF;
}

.nav__lang-btn:hover:not(.active) {
    color: var(--brand-navy);
    background: var(--bg-secondary);
}

/* Hamburger */
.nav__hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    background: none;
    border: none;
    padding: 6px;
}

.nav__hamburger-line {
    display: block;
    width: 22px;
    height: 2px;
    background: var(--text-headline);
    transition: all var(--transition-fast);
    border-radius: 1px;
}

.nav__hamburger.open .nav__hamburger-line:nth-child(1) {
    transform: rotate(45deg) translateY(5px) translateX(5px);
}

.nav__hamburger.open .nav__hamburger-line:nth-child(2) {
    opacity: 0;
}

.nav__hamburger.open .nav__hamburger-line:nth-child(3) {
    transform: rotate(-45deg) translateY(-5px) translateX(5px);
}

@media (max-width: 1024px) {
    .nav__hamburger { display: flex; }

    .nav__links {
        position: fixed;
        top: var(--nav-height);
        left: 0;
        right: 0;
        bottom: 0;
        flex-direction: column;
        background: var(--bg-primary);
        padding: var(--space-lg);
        gap: 0;
        transform: translateX(100%);
        transition: transform var(--transition-base);
        overflow-y: auto;
    }

    .nav__links.open {
        transform: translateX(0);
    }

    .nav__link {
        width: 100%;
        padding: 14px 0;
        border-bottom: 1px solid var(--bg-border-light);
    }

    .nav__dropdown-menu {
        position: static;
        box-shadow: none;
        border: none;
        opacity: 1;
        visibility: visible;
        transform: none;
        padding-left: var(--space-sm);
        background: transparent;
    }
}

/* ═══════ BUTTONS ═══════ */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 28px;
    font-family: var(--font-primary);
    font-size: var(--fs-caption);
    font-weight: var(--fw-semibold);
    letter-spacing: var(--ls-wider);
    text-transform: uppercase;
    border-radius: var(--radius-md);
    border: none;
    cursor: pointer;
    transition: all var(--transition-base);
    text-decoration: none;
    white-space: nowrap;
}

.btn--primary {
    background: var(--accent-primary);
    color: #FFFFFF;
    box-shadow: 0 2px 8px var(--accent-primary-glow);
}

.btn--primary:hover {
    background: var(--accent-primary-hover);
    color: #FFFFFF;
    box-shadow: 0 4px 16px var(--accent-primary-glow);
    transform: translateY(-1px);
}

.btn--secondary {
    background: var(--accent-cta);
    color: #FFFFFF;
    box-shadow: 0 2px 8px var(--accent-cta-glow);
}

.btn--secondary:hover {
    background: var(--accent-cta-hover);
    color: #FFFFFF;
    box-shadow: 0 4px 16px var(--accent-cta-glow);
    transform: translateY(-1px);
}

.btn--outline {
    background: transparent;
    color: var(--brand-navy);
    border: 1.5px solid var(--brand-navy);
}

.btn--outline:hover {
    background: var(--brand-navy);
    color: #FFFFFF;
}

.btn--outline-light {
    background: transparent;
    color: #FFFFFF;
    border: 1.5px solid rgba(255,255,255,0.3);
}

.btn--outline-light:hover {
    background: rgba(255,255,255,0.1);
    color: #FFFFFF;
    border-color: rgba(255,255,255,0.6);
}

.btn--sm  { padding: 8px 18px; font-size: var(--fs-small); }
.btn--lg  { padding: 16px 36px; font-size: var(--fs-body); }

.btn__arrow {
    transition: transform var(--transition-fast);
}

.btn:hover .btn__arrow {
    transform: translateX(3px);
}

/* ═══════ SECTION LAYOUT ═══════ */
.section {
    padding: var(--section-gap) 0;
}

.section--alt {
    background: var(--bg-secondary);
}

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

.section--dark h2,
.section--dark h3,
.section--dark h4 {
    color: var(--text-on-dark);
}

.section-header {
    margin-bottom: var(--space-2xl);
}

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

.section-header__label {
    display: inline-block;
    font-size: var(--fs-small);
    font-weight: var(--fw-semibold);
    text-transform: uppercase;
    letter-spacing: var(--ls-widest);
    color: var(--accent-cta);
    margin-bottom: var(--space-xs);
}

.section-header__title {
    margin-bottom: var(--space-xs);
}

.section-header__subtitle {
    color: var(--text-secondary);
    font-size: var(--fs-subtitle);
    max-width: 680px;
    line-height: var(--lh-relaxed);
}

.section-header--center .section-header__subtitle {
    margin: 0 auto;
}

/* ═══════ PAGE HERO (inner pages) ═══════ */
.page-hero {
    background: var(--gradient-hero);
    padding: calc(var(--nav-height) + var(--space-2xl)) 0 var(--space-2xl);
    color: var(--text-on-dark);
}

.page-hero__label {
    display: inline-block;
    font-size: var(--fs-small);
    font-weight: var(--fw-semibold);
    text-transform: uppercase;
    letter-spacing: var(--ls-widest);
    color: var(--accent-cta);
    margin-bottom: var(--space-xs);
}

.page-hero__title {
    color: #FFFFFF;
    margin-bottom: var(--space-sm);
}

.page-hero__subtitle {
    color: var(--text-on-dark-secondary);
    font-size: var(--fs-subtitle);
    max-width: 640px;
    line-height: var(--lh-relaxed);
}

/* ═══════ CARDS ═══════ */
.card {
    background: var(--bg-card);
    border: 1px solid var(--bg-border);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--bg-border);
    transition: background var(--transition-base);
}

.card:hover {
    border-color: var(--brand-steel-light);
    box-shadow: var(--shadow-elevated);
    transform: translateY(-4px);
}

.card:hover::before {
    background: var(--brand-navy);
}

.card__media {
    width: calc(100% + (var(--space-xl) * 2));
    margin: calc(var(--space-xl) * -1) calc(var(--space-xl) * -1) var(--space-md);
    aspect-ratio: 16 / 10;
    overflow: hidden;
    border-radius: var(--radius-lg) var(--radius-lg) 0 0;
    background: var(--bg-secondary);
}

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

.card__title {
    font-size: var(--fs-subtitle);
    margin-bottom: var(--space-xs);
}

.card__text {
    color: var(--text-secondary);
    font-size: var(--fs-caption);
    line-height: var(--lh-normal);
}

.card__link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    margin-top: var(--space-sm);
    font-size: var(--fs-caption);
    font-weight: var(--fw-semibold);
    text-transform: uppercase;
    letter-spacing: var(--ls-wider);
    color: var(--accent-cta);
    text-decoration: none;
    transition: all var(--transition-fast);
}

.card__link:hover {
    color: var(--accent-cta-hover);
    gap: 10px;
}

/* ═══════ TABLE ═══════ */
.table-wrapper {
    overflow-x: auto;
    margin: var(--space-sm) 0;
    border-radius: var(--radius-md);
    border: 1px solid var(--bg-border);
}

.table {
    width: 100%;
    border-collapse: collapse;
    font-size: var(--fs-caption);
}

.table th {
    background: var(--bg-secondary);
    color: var(--text-headline);
    font-weight: var(--fw-semibold);
    text-transform: uppercase;
    letter-spacing: var(--ls-wider);
    font-size: var(--fs-small);
    padding: 14px 20px;
    text-align: left;
    border-bottom: 2px solid var(--bg-border);
}

.table td {
    padding: 14px 20px;
    border-bottom: 1px solid var(--bg-border-light);
    color: var(--text-body);
}

.table tr:last-child td {
    border-bottom: none;
}

.table tr:hover td {
    background: var(--bg-secondary);
}

/* ═══════ BADGES ═══════ */
.badge {
    display: inline-block;
    padding: 5px 14px;
    font-size: var(--fs-small);
    font-weight: var(--fw-medium);
    border-radius: 100px;
    background: var(--bg-secondary);
    color: var(--brand-navy);
    border: 1px solid var(--bg-border);
}

.badge--accent {
    background: rgba(232, 100, 44, 0.1);
    color: var(--accent-cta);
    border-color: rgba(232, 100, 44, 0.2);
}

/* ═══════ FORMS ═══════ */
.form-group {
    margin-bottom: var(--space-md);
}

.form-label {
    display: block;
    font-size: var(--fs-small);
    font-weight: var(--fw-semibold);
    color: var(--text-headline);
    text-transform: uppercase;
    letter-spacing: var(--ls-wider);
    margin-bottom: 6px;
}

.form-input,
.form-select,
.form-textarea {
    width: 100%;
    padding: 12px 16px;
    font-family: var(--font-primary);
    font-size: var(--fs-body);
    color: var(--text-headline);
    background: var(--bg-primary);
    border: 1.5px solid var(--bg-border);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
    outline: none;
    border-color: var(--brand-navy);
    box-shadow: 0 0 0 3px var(--accent-primary-glow);
}

.form-textarea {
    min-height: 120px;
    resize: vertical;
}

.form-error {
    display: block;
    font-size: var(--fs-small);
    color: var(--accent-error);
    margin-top: 4px;
}

.form-error--summary {
    padding: var(--space-sm);
    margin: 0 0 var(--space-md);
    background: rgba(220, 38, 38, 0.08);
    border: 1px solid rgba(220, 38, 38, 0.2);
    border-radius: var(--radius-md);
}

.form-success {
    padding: var(--space-md);
    background: rgba(22, 163, 74, 0.08);
    border: 1px solid rgba(22, 163, 74, 0.2);
    border-radius: var(--radius-md);
    color: var(--accent-success);
}

/* ═══════ SPEC LIST ═══════ */
.spec-list {
    list-style: none;
    padding: 0;
    margin: var(--space-sm) 0 var(--space-lg);
}

.spec-list li {
    position: relative;
    padding-left: 24px;
    padding-top: 6px;
    padding-bottom: 6px;
    color: var(--text-body);
    font-size: var(--fs-body);
    border-bottom: 1px solid var(--bg-border-light);
}

.spec-list li:last-child { border-bottom: none; }

.spec-list li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 14px;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--brand-navy);
}

/* ═══════ PROCESS STEPS ═══════ */
.process-step {
    display: flex;
    gap: var(--space-md);
    padding: var(--space-md) 0;
    border-bottom: 1px solid var(--bg-border-light);
}

.process-step:last-child { border-bottom: none; }

.process-step__number {
    width: 40px;
    height: 40px;
    min-width: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-mono);
    font-weight: var(--fw-bold);
    font-size: var(--fs-body);
    color: #FFFFFF;
    background: var(--brand-navy);
    border-radius: var(--radius-sm);
}

.process-step__content h4 {
    font-size: var(--fs-body);
    margin-bottom: 4px;
}

.process-step__content p {
    font-size: var(--fs-caption);
    color: var(--text-secondary);
    margin-bottom: 0;
}

/* ═══════ PILLAR ═══════ */
.pillar {
    padding: var(--space-lg);
    border: 1px solid var(--bg-border);
    border-radius: var(--radius-lg);
    background: var(--bg-card);
    transition: all var(--transition-base);
}

.pillar:hover {
    box-shadow: var(--shadow-card);
    border-color: var(--brand-steel-light);
}

.pillar__number {
    display: inline-block;
    font-family: var(--font-mono);
    font-size: var(--fs-display);
    font-weight: var(--fw-extrabold);
    color: var(--bg-border);
    line-height: 1;
    margin-bottom: var(--space-xs);
}

.pillar__title {
    font-size: var(--fs-body);
    font-weight: var(--fw-bold);
    margin-bottom: var(--space-xs);
}

.pillar__text {
    font-size: var(--fs-caption);
    color: var(--text-secondary);
    line-height: var(--lh-normal);
    margin-bottom: 0;
}

/* ═══════ TIMELINE ═══════ */
.timeline {
    position: relative;
    padding-left: 32px;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 7px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: var(--bg-border);
}

.timeline__item {
    position: relative;
    padding-bottom: var(--space-lg);
}

.timeline__item::before {
    content: '';
    position: absolute;
    left: -29px;
    top: 4px;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--brand-navy);
    border: 3px solid var(--bg-primary);
    box-shadow: 0 0 0 2px var(--brand-navy);
}

.timeline__year {
    font-family: var(--font-mono);
    font-weight: var(--fw-bold);
    font-size: var(--fs-caption);
    color: var(--brand-navy);
    margin-bottom: 4px;
}

.timeline__text {
    font-size: var(--fs-caption);
    color: var(--text-secondary);
}

/* ═══════ DIVIDER ═══════ */
.divider--sm {
    width: 48px;
    height: 3px;
    background: var(--accent-cta);
    border: none;
    margin: var(--space-md) 0;
    border-radius: 2px;
}

/* ═══════ CTA BANNER ═══════ */
.cta-banner {
    background: var(--gradient-hero);
    border-radius: var(--radius-xl);
    padding: var(--space-2xl) var(--space-xl);
    text-align: center;
    color: var(--text-on-dark);
}

.cta-banner__title {
    color: #FFFFFF;
    margin-bottom: var(--space-sm);
}

.cta-banner__text {
    color: var(--text-on-dark-secondary);
    max-width: 600px;
    margin: 0 auto var(--space-lg);
    font-size: var(--fs-subtitle);
    line-height: var(--lh-relaxed);
}

.cta-banner__actions {
    display: flex;
    gap: var(--space-sm);
    justify-content: center;
    flex-wrap: wrap;
}

/* ═══════ FOOTER ═══════ */
.footer {
    background: var(--gradient-footer);
    color: var(--text-on-dark-secondary);
    padding: var(--space-3xl) 0 var(--space-lg);
}

.footer__grid {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
    gap: var(--space-2xl);
    padding-bottom: var(--space-xl);
    border-bottom: 1px solid var(--bg-dark-border);
    margin-bottom: var(--space-lg);
}

.footer__brand-text {
    font-size: var(--fs-caption);
    color: var(--text-on-dark-secondary);
    line-height: var(--lh-normal);
    margin-top: var(--space-sm);
    margin-bottom: 0;
}

.footer__heading {
    font-size: var(--fs-caption);
    font-weight: var(--fw-semibold);
    text-transform: uppercase;
    letter-spacing: var(--ls-widest);
    color: var(--text-on-dark);
    margin-bottom: var(--space-md);
}

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

.footer__links li {
    margin-bottom: 10px;
}

.footer__links a {
    color: var(--text-on-dark-secondary);
    font-size: var(--fs-caption);
    transition: color var(--transition-fast);
    text-decoration: none;
}

.footer__links a:hover {
    color: #FFFFFF;
}

.footer__contact-item {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    margin-bottom: 14px;
    font-size: var(--fs-caption);
}

.footer__contact-item svg {
    width: 16px;
    height: 16px;
    min-width: 16px;
    stroke: var(--accent-cta);
    fill: none;
    stroke-width: 1.5;
    margin-top: 2px;
}

.footer__contact-links {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.footer__bottom {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: var(--space-sm);
}

.footer__copyright {
    font-size: var(--fs-small);
    color: var(--text-on-dark-muted);
    margin-bottom: 0;
}

.footer__certs {
    display: flex;
    gap: var(--space-xs);
}

.footer__cert-badge {
    display: inline-block;
    padding: 4px 12px;
    font-size: 0.7rem;
    font-weight: var(--fw-semibold);
    letter-spacing: var(--ls-wider);
    border: 1px solid var(--bg-dark-border);
    border-radius: var(--radius-sm);
    color: var(--text-on-dark-secondary);
}

@media (max-width: 1024px) {
    .footer__grid {
        grid-template-columns: 1fr 1fr;
    }
}

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

/* ═══════ SCROLL ANIMATIONS ═══════ */
.fade-in {
    opacity: 0;
    transform: translateY(16px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

.delay-1 { transition-delay: 0.05s; }
.delay-2 { transition-delay: 0.10s; }
.delay-3 { transition-delay: 0.15s; }
.delay-4 { transition-delay: 0.20s; }
.delay-5 { transition-delay: 0.25s; }
.delay-6 { transition-delay: 0.30s; }

.scale-in {
    opacity: 0;
    transform: scale(0.95);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.scale-in.visible {
    opacity: 1;
    transform: scale(1);
}

/* ═══════ CERTIFICATE IMAGES ═══════ */
.cert-img {
    max-height: 280px;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-card);
    border: 1px solid var(--bg-border);
    object-fit: contain;
}

/* ═══════ MISC UTILITY ═══════ */
.hide-mobile { display: inline; }
.mb-2xl { margin-bottom: var(--space-2xl); }
.gap-md { gap: var(--space-md); }
.gap-2xl { gap: var(--space-2xl); }
.flex { display: flex; }
.items-center { align-items: center; }
.gap-sm { gap: var(--space-sm); }

@media (max-width: 768px) {
    .hide-mobile { display: none; }
}

/* ═══════ THEME TOGGLE ═══════ */
.theme-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--bg-border);
    background: var(--bg-secondary);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition-fast);
    flex-shrink: 0;
}

.theme-toggle:hover {
    color: var(--brand-navy);
    border-color: var(--brand-navy);
    background: var(--accent-primary-glow);
}

.theme-toggle__icon { display: block; }
.theme-toggle__icon--moon { display: none; }

/* Logo visibility: light mode default */
.nav__logo-dark  { display: block; }
.nav__logo-light { display: none; }

/* ═══════ DARK THEME ═══════ */
html.dark {
    --bg-primary:         #27132B;
    --bg-secondary:       #341A39;
    --bg-tertiary:        #412046;
    --bg-card:            #341A39;
    --bg-elevated:        #412046;
    --bg-border:          #572F5E;
    --bg-border-light:    #4A2650;

    --text-headline:      #FFFFFF;
    --text-body:          #D4C3D6;
    --text-secondary:     #B49BB8;
    --text-muted:         #7B657F;
    --text-caption:       #96809A;

    --accent-primary-glow: rgba(106, 46, 115, 0.24);

    --shadow-sm:      0 1px 3px rgba(0, 0, 0, 0.3);
    --shadow-card:    0 2px 12px rgba(0, 0, 0, 0.3);
    --shadow-elevated: 0 8px 30px rgba(0, 0, 0, 0.4);
    --shadow-heavy:   0 16px 48px rgba(0, 0, 0, 0.5);

    --gradient-nav:   linear-gradient(180deg, rgba(15,23,41,0.97) 0%, rgba(15,23,41,0.92) 100%);
    --gradient-section: linear-gradient(180deg, #341A39 0%, #27132B 100%);
}

html.dark .nav {
    background: rgba(39, 19, 43, 0.95);
    border-bottom-color: var(--bg-border);
}

html.dark .nav.scrolled {
    background: rgba(39, 19, 43, 0.98);
}

html.dark .nav__link {
    color: var(--text-body);
}

html.dark .nav__link:hover,
html.dark .nav__link.active {
    color: #FFFFFF;
}

html.dark .nav__dropdown-menu {
    background: var(--bg-card);
    border-color: var(--bg-border);
}

html.dark .nav__dropdown-item {
    color: var(--text-body);
}

html.dark .nav__dropdown-item:hover {
    background: var(--bg-elevated);
    color: #FFFFFF;
}

html.dark .nav__lang-btn {
    color: var(--text-secondary);
}

html.dark .nav__lang-btn:hover:not(.active) {
    background: var(--bg-elevated);
    color: #FFFFFF;
}

html.dark .nav__hamburger-line {
    background: #FFFFFF;
}

html.dark .theme-toggle {
    background: var(--bg-elevated);
    border-color: var(--bg-border);
    color: var(--text-body);
}

html.dark .theme-toggle:hover {
    color: var(--accent-cta);
    border-color: var(--accent-cta);
}

html.dark .theme-toggle__icon--sun  { display: none; }
html.dark .theme-toggle__icon--moon { display: block; }

/* Nav logo swap */
html.dark .nav__logo-dark  { display: none; }
html.dark .nav__logo-light { display: block; }

/* Dark mode form inputs */
html.dark .form-input,
html.dark .form-select,
html.dark .form-textarea {
    background: var(--bg-elevated);
    border-color: var(--bg-border);
    color: #FFFFFF;
}

/* Dark mode scrollbar */
html.dark ::-webkit-scrollbar-track { background: var(--bg-primary); }
html.dark ::-webkit-scrollbar-thumb { background: var(--bg-border); }

html.dark ::selection {
    background-color: var(--accent-cta);
    color: #FFFFFF;
}

/* ═══════ WHATSAPP FAB ═══════ */
.whatsapp-fab {
    position: fixed;
    bottom: 28px;
    right: 28px;
    z-index: var(--z-overlay);
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background: #25D366;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 14px rgba(37, 211, 102, 0.4);
    transition: all var(--transition-base);
    text-decoration: none;
}

.whatsapp-fab:hover {
    background: #20BD5A;
    transform: scale(1.08);
    box-shadow: 0 6px 20px rgba(37, 211, 102, 0.5);
}

.whatsapp-fab svg {
    display: block;
}

/* Pulse animation on WhatsApp FAB */
.whatsapp-fab::before {
    content: '';
    position: absolute;
    inset: -4px;
    border-radius: 50%;
    border: 2px solid rgba(37, 211, 102, 0.4);
    animation: whatsappPulse 2s ease-in-out infinite;
}

@keyframes whatsappPulse {
    0%, 100% { transform: scale(1); opacity: 1; }
    50% { transform: scale(1.15); opacity: 0; }
}

@media (max-width: 768px) {
    .whatsapp-fab {
        bottom: 20px;
        right: 20px;
        width: 50px;
        height: 50px;
    }
}