/* ==========================================================================
   Beauty Face be Petra — znovupoužitelné komponenty
   ========================================================================== */

/* --- Tlačítka --- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-1);
    min-height: 48px;
    padding: 0 var(--space-4);
    border: 1px solid transparent;
    border-radius: var(--radius);
    font-size: 0.8125rem;
    font-weight: 500;
    letter-spacing: 0.16em;
    text-transform: uppercase;
    white-space: nowrap;
    transition: background-color var(--duration-fast) ease, color var(--duration-fast) ease,
        border-color var(--duration-fast) ease;
}

.btn--gold {
    background-color: var(--gold);
    color: var(--text-on-gold);
}

.btn--gold:hover {
    background-color: var(--gold-deep);
    color: var(--bg-primary);
}

.btn--outline {
    border-color: var(--line-strong);
    color: var(--text-primary);
}

.btn--outline:hover {
    border-color: var(--gold);
    color: var(--gold-deep);
}

.section--invert .btn--outline {
    border-color: var(--gold-on-invert);
    color: var(--text-on-invert);
}

/* --- Ikonová tlačítka v hlavičce --- */
.icon-btn {
    display: grid;
    place-items: center;
    width: 44px;
    height: 44px;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    color: var(--text-secondary);
    transition: border-color var(--duration-fast) ease, color var(--duration-fast) ease;
}

.icon-btn:hover {
    border-color: var(--gold);
    color: var(--gold-deep);
}

.icon-btn svg {
    width: 18px;
    height: 18px;
}

.theme-toggle .icon-moon {
    display: block;
}

.theme-toggle .icon-sun {
    display: none;
}

:root[data-theme="dark"] .theme-toggle .icon-moon {
    display: none;
}

:root[data-theme="dark"] .theme-toggle .icon-sun {
    display: block;
}

/* --- Zpět nahoru --- */
.back-to-top {
    position: fixed;
    right: var(--space-3);
    bottom: var(--space-3);
    z-index: 60;
    display: grid;
    place-items: center;
    width: 46px;
    height: 46px;
    background-color: var(--bg-invert);
    color: var(--text-on-invert);
    border-radius: 50%;
    opacity: 0;
    visibility: hidden;
    transform: translateY(8px);
    transition: opacity var(--duration-base) ease, transform var(--duration-base) var(--ease-out),
        visibility var(--duration-base);
}

.back-to-top.is-visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.back-to-top svg {
    width: 18px;
    height: 18px;
}

/* --- Sticky CTA na mobilu --- */
.sticky-cta {
    position: fixed;
    inset: auto 0 0 0;
    z-index: 90;
    display: none;
    gap: var(--space-1);
    padding: var(--space-1);
    background-color: var(--bg-primary);
    border-top: 1px solid var(--line);
    box-shadow: 0 -8px 24px -12px var(--overlay);
}

.sticky-cta .btn {
    flex: 1;
    min-width: 0;
    padding-inline: var(--space-2);
}

body.is-locked .sticky-cta {
    display: none;
}

@media (max-width: 960px) {
    .sticky-cta {
        display: flex;
    }

    body {
        padding-bottom: 64px;
    }

    .back-to-top {
        bottom: 76px;
    }
}

/* --- Hlavička sekce --- */
.section-head {
    display: grid;
    grid-template-columns: auto 1fr;
    align-items: center;
    gap: var(--space-2);
    margin-bottom: var(--space-6);
    text-align: left;
}

.section-head__number {
    color: var(--gold-deep);
    font-family: var(--font-body);
    font-size: 0.75rem;
    font-weight: 500;
    letter-spacing: 0.22em;
}

.section-head__rule {
    height: 1px;
    background-color: var(--line-strong);
}

.section-head__title {
    grid-column: 1 / -1;
    margin-top: var(--space-2);
    max-width: 20ch;
}

.section--invert .section-head__number {
    color: var(--gold-on-invert);
}

/* --- Taby --- */
.tablist {
    display: flex;
    flex-wrap: wrap;
    gap: 0 var(--space-3);
    margin-bottom: var(--space-6);
    padding-bottom: var(--space-1);
    border-bottom: 1px solid var(--line);
}

.tab {
    position: relative;
    display: inline-flex;
    align-items: center;
    min-height: 44px;
    padding-bottom: var(--space-1);
    color: var(--text-muted);
    font-size: 0.8125rem;
    font-weight: 500;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    transition: color var(--duration-fast) ease;
}

.tab::after {
    content: "";
    position: absolute;
    inset: auto 0 4px 0;
    height: 1px;
    background-color: var(--gold);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform var(--duration-base) var(--ease-out);
}

.tab[aria-selected="true"] {
    color: var(--text-primary);
}

.tab[aria-selected="true"]::after {
    transform: scaleX(1);
}

.tab:hover {
    color: var(--text-primary);
}

/* Taby uvnitř tmavé (invertované) sekce — světlý text místo tmavého */
.section--invert .tablist {
    border-bottom-color: var(--line-strong);
}

.section--invert .tab {
    color: var(--text-on-invert);
    opacity: 0.55;
    transition: color var(--duration-fast) ease, opacity var(--duration-fast) ease;
}

.section--invert .tab:hover,
.section--invert .tab[aria-selected="true"] {
    color: var(--text-on-invert);
    opacity: 1;
}

.section--invert .tab::after {
    background-color: var(--gold-on-invert);
}

/* --- Před/po slider --- */
.compare {
    --position: 50%;

    position: relative;
    overflow: hidden;
    aspect-ratio: 3 / 2;
    border-radius: var(--radius);
    touch-action: none;
    user-select: none;
}

.compare__after,
.compare__before {
    position: absolute;
    inset: 0;
}

.compare__before {
    clip-path: inset(0 calc(100% - var(--position)) 0 0);
}

.compare__after img,
.compare__before img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.compare__handle {
    position: absolute;
    inset: 0 auto 0 var(--position);
    width: 1px;
    background-color: var(--gold-on-invert);
    pointer-events: none;
}

.compare__handle::after {
    content: "";
    position: absolute;
    top: 50%;
    left: 50%;
    width: 44px;
    height: 44px;
    border: 1px solid var(--gold-on-invert);
    border-radius: 50%;
    background-color: var(--overlay);
    transform: translate(-50%, -50%);
}

.compare__range {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    margin: 0;
    background: none;
    opacity: 0;
    cursor: ew-resize;
    -webkit-appearance: none;
    appearance: none;
}

.compare__range:focus-visible {
    opacity: 1;
    outline: 2px solid var(--gold-deep);
    outline-offset: 3px;
}

.compare__range::-webkit-slider-thumb {
    width: 44px;
    height: 44px;
    -webkit-appearance: none;
    appearance: none;
}

/* --- Timeline --- */
.timeline {
    position: relative;
    display: grid;
    gap: var(--space-6);
    margin-top: var(--space-6);
}

.timeline::before {
    content: "";
    position: absolute;
    inset: var(--space-1) auto var(--space-1) calc(var(--space-4) / 2);
    width: 1px;
    background-color: var(--line-strong);
}

.timeline__step {
    position: relative;
    display: grid;
    grid-template-columns: var(--space-4) minmax(0, 1fr);
    gap: var(--space-4);
    align-items: start;
}

.timeline__number {
    display: grid;
    place-items: center;
    width: var(--space-4);
    height: var(--space-4);
    background-color: var(--bg-primary);
    border: 1px solid var(--line-strong);
    border-radius: 50%;
    color: var(--gold-deep);
    font-size: 0.6875rem;
    font-weight: 500;
    letter-spacing: 0.12em;
}

.timeline__step > div {
    grid-column: 2;
}

.timeline__duration {
    margin-top: 2px;
    color: var(--text-muted);
    font-size: 0.75rem;
    letter-spacing: 0.14em;
    text-transform: uppercase;
}

.timeline__step h3 + .timeline__duration + p {
    margin-top: var(--space-2);
}

/* --- Akordeon --- */
.faq-list {
    border-top: 1px solid var(--line);
}

.faq-item {
    border-bottom: 1px solid var(--line);
}

.faq-item h3 {
    font-family: var(--font-body);
    font-size: 1rem;
    font-weight: 400;
}

.faq-question {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-3);
    width: 100%;
    padding-block: var(--space-3);
    padding-right: var(--space-4);
    color: var(--text-primary);
    font-size: 1.0625rem;
    text-align: left;
    transition: color var(--duration-fast) ease;
}

.faq-question:hover {
    color: var(--gold-deep);
}

.faq-question::before,
.faq-question::after {
    content: "";
    position: absolute;
    top: 50%;
    right: 2px;
    width: 13px;
    height: 1px;
    background-color: var(--gold);
    transition: transform var(--duration-base) var(--ease-out);
}

.faq-question::after {
    transform: rotate(90deg);
}

.faq-item.is-open .faq-question::after {
    transform: rotate(0deg);
}

.faq-answer {
    padding-bottom: var(--space-3);
}

.faq-answer p {
    max-width: 72ch;
    font-size: 0.9375rem;
}

/* --- Brand Badge (Ella Baché Paris) --- */
.brand-badge {
    display: inline-flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--space-3) var(--space-4);
    border: 1px solid var(--line-strong);
    border-radius: var(--radius);
    background-color: var(--bg-secondary);
    text-align: center;
    margin-top: var(--space-4);
}

.brand-badge__subtitle {
    font-family: var(--font-body);
    font-size: 0.6875rem;
    font-weight: 500;
    letter-spacing: 0.22em;
    text-transform: uppercase;
    color: var(--gold-deep);
    margin-bottom: var(--space-1);
}

.brand-badge__title {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 400;
    letter-spacing: 0.08em;
    color: var(--text-primary);
    line-height: 1.1;
}

.brand-badge__location {
    font-family: var(--font-body);
    font-size: 0.625rem;
    letter-spacing: 0.3em;
    text-transform: uppercase;
    color: var(--text-muted);
    margin-top: 2px;
}

/* --- Promo Box / Permanentka Card --- */
.promo-box {
    margin-top: var(--space-6);
    padding: var(--space-4);
    border: 1px solid var(--gold);
    border-radius: var(--radius);
    background-color: var(--bg-secondary);
    display: flex;
    align-items: flex-start;
    gap: var(--space-3);
}

.section--invert .promo-box {
    background-color: var(--bg-tertiary);
    border-color: var(--gold-on-invert);
}

.promo-box__icon {
    flex-shrink: 0;
    color: var(--gold-deep);
}

.promo-box__icon svg {
    display: block;
    width: 26px;
    height: 26px;
}

.promo-box__text {
    font-size: 0.9375rem;
    color: var(--text-primary);
    line-height: 1.6;
}

/* Box drží „stránkové“ barvy i uvnitř invertované sekce — pozadí je z tokenů
   stránky (bg-tertiary), takže text musí být text-primary, ne text-on-invert */
.section--invert .promo-box__text {
    color: var(--text-primary);
}