/* BTCPLAST — Light Blue & White Theme */

@font-face {
    font-family: 'Btcplast';
    src: url('../fonts/btcplast.woff2') format('woff2');
    font-weight: 400 700;
    font-display: swap;
}

:root {
    --bg-primary: #FFFFFF;
    --bg-secondary: #E8F4FC;
    --bg-soft: #F4F9FD;
    --accent-blue: #1B6CA8;
    --accent-blue-dark: #145080;
    --accent-light: #4DA3D9;
    --text-primary: #1A2B3C;
    --text-muted: #5A6B7D;
    --border-subtle: rgba(27, 108, 168, 0.15);
    --font-display: 'Btcplast', 'Cormorant Garamond', Georgia, serif;
    --font-body: 'Manrope', system-ui, sans-serif;
    --header-height: 80px;
    --transition: 0.45s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    --section-padding: clamp(4rem, 8vw, 7rem);
}

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

html { scroll-behavior: smooth; font-size: 16px; }

body {
    font-family: var(--font-body);
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.65;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
}

img, video { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }

.container { width: min(1280px, 92vw); margin-inline: auto; }

.label {
    font-size: 0.72rem;
    font-weight: 600;
    letter-spacing: 0.22em;
    text-transform: uppercase;
    color: var(--accent-blue);
}

/* Header */
.site-header {
    position: fixed;
    inset: 0 0 auto 0;
    z-index: 100;
    height: var(--header-height);
    display: flex;
    align-items: center;
    transition: background var(--transition), box-shadow var(--transition), border-color var(--transition);
    background: rgba(255, 255, 255, 0.94);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    border-bottom: 1px solid var(--border-subtle);
    box-shadow: 0 4px 30px rgba(27, 108, 168, 0.08);
}

.site-header.is-scrolled {
    background: rgba(255, 255, 255, 0.98);
    box-shadow: 0 6px 32px rgba(27, 108, 168, 0.12);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: min(1280px, 92vw);
    margin-inline: auto;
}

.logo {
    font-family: var(--font-display);
    font-size: 1.65rem;
    letter-spacing: 0.06em;
    color: var(--text-primary);
    font-weight: 600;
}

.logo span { color: var(--accent-blue); }

.nav-desktop {
    display: flex;
    align-items: center;
    gap: 0.25rem;
    padding: 0.35rem;
    background: rgba(255, 255, 255, 0.75);
    border: 1px solid var(--border-subtle);
    border-radius: 999px;
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.8);
}

.nav-desktop a {
    font-size: 0.78rem;
    font-weight: 600;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--text-primary);
    transition: color var(--transition), background var(--transition), box-shadow var(--transition);
    position: relative;
    padding: 0.6rem 1.15rem;
    border-radius: 999px;
}

.nav-desktop a::after { display: none; }

.nav-desktop a:hover {
    color: var(--accent-blue);
    background: rgba(27, 108, 168, 0.08);
}

.nav-desktop a.is-active {
    color: #fff;
    background: linear-gradient(135deg, var(--accent-blue) 0%, var(--accent-light) 100%);
    box-shadow: 0 4px 14px rgba(27, 108, 168, 0.35);
}

.nav-desktop a.nav-cta {
    background: linear-gradient(135deg, #0D9488 0%, #14B8A6 100%);
    color: #fff;
    box-shadow: 0 4px 16px rgba(13, 148, 136, 0.35);
    margin-left: 0.15rem;
}

.nav-desktop a.nav-cta:hover {
    color: #fff;
    background: linear-gradient(135deg, #0F766E 0%, #0D9488 100%);
    transform: translateY(-1px);
    box-shadow: 0 6px 20px rgba(13, 148, 136, 0.4);
}

.nav-desktop a.nav-cta.is-active {
    background: linear-gradient(135deg, #0F766E 0%, #14B8A6 100%);
    box-shadow: 0 4px 18px rgba(13, 148, 136, 0.45);
}

.nav-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    width: 32px;
    height: 24px;
    position: relative;
}

.nav-toggle span,
.nav-toggle span::before,
.nav-toggle span::after {
    display: block;
    width: 100%;
    height: 2px;
    background: var(--accent-blue);
    transition: var(--transition);
}

.nav-toggle span::before,
.nav-toggle span::after { content: ''; position: absolute; left: 0; }
.nav-toggle span::before { top: 0; }
.nav-toggle span::after { bottom: 0; }

.nav-mobile {
    display: none;
    position: fixed;
    inset: var(--header-height) 0 0 0;
    background: var(--bg-primary);
    padding: 2rem;
    flex-direction: column;
    gap: 1.5rem;
    z-index: 99;
    border-top: 1px solid var(--border-subtle);
    box-shadow: 0 8px 32px rgba(27, 108, 168, 0.1);
}

.nav-mobile.is-open { display: flex; }

.nav-mobile a {
    font-size: 0.9rem;
    font-weight: 600;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--text-primary);
    padding: 0.85rem 0.5rem;
    border-bottom: 1px solid rgba(27, 108, 168, 0.1);
    border-radius: 8px;
}

.nav-mobile a:hover,
.nav-mobile a.is-active {
    color: var(--accent-blue);
    background: rgba(27, 108, 168, 0.08);
}

/* Hero */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: flex-end;
    overflow: hidden;
    background: var(--bg-secondary);
}

.hero-media { position: absolute; inset: 0; }

.hero-media video,
.hero-media img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.hero-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(
        180deg,
        rgba(255, 255, 255, 0.55) 0%,
        rgba(232, 244, 252, 0.65) 35%,
        rgba(255, 255, 255, 0.95) 100%
    );
}

.hero-content {
    position: relative;
    z-index: 2;
    padding: calc(var(--header-height) + 3rem) 0 5rem;
    width: min(1280px, 92vw);
    margin-inline: auto;
}

.hero-content h1 {
    font-family: var(--font-display);
    font-size: clamp(2.8rem, 7vw, 5rem);
    font-weight: 400;
    line-height: 1.05;
    letter-spacing: -0.01em;
    max-width: 14ch;
    margin-bottom: 1.5rem;
    color: var(--text-primary);
}

.hero-content p {
    font-size: 1.05rem;
    color: var(--text-muted);
    max-width: 48ch;
    margin-bottom: 2.5rem;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    font-family: var(--font-body);
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    padding: 1rem 2rem;
    border: 1px solid transparent;
    cursor: pointer;
    transition: all var(--transition);
}

.btn-primary {
    background: var(--accent-blue);
    color: #fff;
    border-color: var(--accent-blue);
}

.btn-primary:hover {
    background: var(--accent-blue-dark);
    border-color: var(--accent-blue-dark);
}

.btn-outline {
    background: transparent;
    color: var(--accent-blue);
    border-color: var(--accent-blue);
}

.btn-outline:hover {
    background: var(--bg-secondary);
}

/* Sections */
.section { padding-block: var(--section-padding); }

.section-header { margin-bottom: clamp(2.5rem, 5vw, 4rem); }

.section-header h2 {
    font-family: var(--font-display);
    font-size: clamp(2rem, 4.5vw, 3.25rem);
    font-weight: 400;
    line-height: 1.15;
    margin-top: 0.75rem;
    color: var(--text-primary);
}

.section-header p {
    color: var(--text-muted);
    max-width: 56ch;
    margin-top: 1rem;
}

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

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

/* Reveal */
.reveal {
    opacity: 0;
    transform: translateY(28px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.reveal.is-visible { opacity: 1; transform: translateY(0); }

/* Feature grid */
.feature-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
}

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

.feature-card {
    background: var(--bg-primary);
    padding: clamp(1.75rem, 3vw, 2.5rem);
    border: 1px solid var(--border-subtle);
    transition: box-shadow var(--transition), transform var(--transition);
}

.feature-card:hover {
    box-shadow: 0 12px 40px rgba(27, 108, 168, 0.12);
    transform: translateY(-2px);
}

.feature-card h3 {
    font-family: var(--font-display);
    font-size: 1.35rem;
    font-weight: 500;
    margin: 1rem 0 0.75rem;
    color: var(--accent-blue-dark);
}

.feature-card p {
    font-size: 0.92rem;
    color: var(--text-muted);
}

.feature-icon {
    width: 40px;
    height: 3px;
    background: var(--accent-light);
    border-radius: 2px;
}

/* Editorial */
.editorial-grid {
    display: grid;
    grid-template-columns: repeat(12, 1fr);
    gap: clamp(1rem, 2vw, 2rem);
}

.editorial-item {
    position: relative;
    overflow: hidden;
    grid-column: span 6;
}

.editorial-item:nth-child(3n+1) { grid-column: span 7; }
.editorial-item:nth-child(3n+2) { grid-column: span 5; margin-top: 3rem; }
.editorial-item:nth-child(3n) { grid-column: span 6; }

.editorial-item__image {
    aspect-ratio: 4/5;
    overflow: hidden;
    background: var(--bg-secondary);
    border-radius: 2px;
}

.editorial-item__image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 1.2s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.editorial-item:hover .editorial-item__image img { transform: scale(1.04); }

.editorial-item__body { padding: 1.25rem 0 0; }

.editorial-item__body h3 {
    font-family: var(--font-display);
    font-size: 1.65rem;
    font-weight: 400;
    margin-bottom: 0.5rem;
    transition: color var(--transition);
}

.editorial-item:hover .editorial-item__body h3 { color: var(--accent-blue); }

.editorial-item__body p { font-size: 0.9rem; color: var(--text-muted); }

/* CTA */
.cta-band {
    text-align: center;
    padding-block: clamp(4rem, 8vw, 6rem);
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-subtle);
}

.cta-band h2 {
    font-family: var(--font-display);
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 400;
    margin: 0.75rem 0 1.5rem;
}

.cta-band p {
    color: var(--text-muted);
    max-width: 50ch;
    margin: 0 auto 2rem;
}

/* Footer */
.site-footer {
    padding: clamp(3rem, 6vw, 5rem) 0 2rem;
    background: var(--text-primary);
    color: #fff;
}

.site-footer .logo { color: #fff; }
.site-footer .logo span { color: var(--accent-light); }
.site-footer .label { color: var(--accent-light); }

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 3rem;
    padding-bottom: 3rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.15);
}

.footer-brand p {
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.7);
    max-width: 36ch;
    margin-top: 1rem;
}

.footer-col h4 {
    font-size: 0.72rem;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--accent-light);
    margin-bottom: 1.25rem;
}

.footer-col a,
.footer-col p {
    display: block;
    font-size: 0.88rem;
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: 0.6rem;
    transition: color var(--transition);
}

.footer-col a:hover { color: #fff; }

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: relative;
    padding-top: 1.5rem;
    font-size: 0.78rem;
    color: rgba(255, 255, 255, 0.5);
}

.footer-bottom__left {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.35rem 1.5rem;
}

.footer-bottom__tagline {
    color: rgba(255, 255, 255, 0.5);
}

.footer-social__links {
    display: flex;
    align-items: center;
    gap: 0.85rem;
}

.footer-social__link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 2.25rem;
    height: 2.25rem;
    border-radius: 50%;
    color: rgba(255, 255, 255, 0.75);
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.12);
    transition: color var(--transition), background var(--transition), border-color var(--transition), transform var(--transition);
}

.footer-social__link svg {
    width: 1.1rem;
    height: 1.1rem;
}

.footer-social__link:hover {
    color: #fff;
    background: rgba(255, 255, 255, 0.16);
    border-color: rgba(255, 255, 255, 0.25);
    transform: translateY(-2px);
}

.footer-admin-gate {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 1.5rem;
    min-height: 1.5rem;
    padding: 0.25rem;
    font-size: 0.65rem;
    line-height: 1;
    color: transparent;
    opacity: 0;
    transition: opacity var(--transition);
}

.footer-admin-gate:hover,
.footer-admin-gate:focus-visible {
    opacity: 0.35;
    color: rgba(255, 255, 255, 0.35);
    outline: none;
}

/* Page hero */
.page-hero {
    padding: calc(var(--header-height) + 4rem) 0 3rem;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-subtle);
}

.page-hero h1 {
    font-family: var(--font-display);
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 400;
    margin-top: 0.75rem;
}

.page-hero__lead {
    max-width: 42rem;
    margin-top: 1rem;
    color: var(--text-muted);
    font-size: 1.05rem;
    line-height: 1.7;
}

/* Contact */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: clamp(2rem, 4vw, 4rem);
}

.contact-form label {
    display: block;
    font-size: 0.72rem;
    letter-spacing: 0.16em;
    text-transform: uppercase;
    color: var(--text-muted);
    margin-bottom: 0.5rem;
}

.contact-form input,
.contact-form textarea {
    width: 100%;
    background: var(--bg-soft);
    border: 1px solid var(--border-subtle);
    color: var(--text-primary);
    font-family: var(--font-body);
    font-size: 0.95rem;
    padding: 0.75rem 1rem;
    margin-bottom: 1.5rem;
    outline: none;
    transition: border-color var(--transition);
}

.contact-form input:focus,
.contact-form textarea:focus { border-color: var(--accent-blue); }

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

.map-embed {
    aspect-ratio: 4/3;
    border: 1px solid var(--border-subtle);
    overflow: hidden;
    border-radius: 2px;
}

.map-embed iframe { width: 100%; height: 100%; border: 0; }

.alert-success {
    padding: 1rem 1.25rem;
    border: 1px solid var(--accent-blue);
    color: var(--accent-blue-dark);
    background: var(--bg-secondary);
    font-size: 0.88rem;
    margin-bottom: 2rem;
}

.alert-error {
    padding: 1rem 1.25rem;
    border: 1px solid rgba(180, 45, 45, 0.35);
    color: #8f1f1f;
    background: #fff5f5;
    font-size: 0.88rem;
    margin-bottom: 2rem;
}

.field-error {
    display: block;
    margin-top: 0.35rem;
    margin-bottom: 0.75rem;
    font-size: 0.82rem;
    color: #b42d2d;
}

.about-split {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: clamp(2rem, 5vw, 5rem);
    align-items: center;
}

.about-split__text p { color: var(--text-muted); margin-bottom: 1.25rem; }

.about-image {
    aspect-ratio: 3/4;
    background: var(--bg-secondary);
    overflow: hidden;
    border-radius: 2px;
}

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

.empty-state { text-align: center; padding: 4rem 0; color: var(--text-muted); }

@media (max-width: 1024px) {
    .feature-grid, .feature-grid--two { grid-template-columns: 1fr; }
    .editorial-item,
    .editorial-item:nth-child(3n+1),
    .editorial-item:nth-child(3n+2),
    .editorial-item:nth-child(3n) { grid-column: span 12; margin-top: 0; }
    .footer-grid { grid-template-columns: 1fr 1fr; }
    .about-split { grid-template-columns: 1fr; }
    .contact-grid { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
    .nav-desktop { display: none; }
    .nav-toggle { display: block; }
    .hero-content h1 { max-width: 100%; }
    .footer-grid { grid-template-columns: 1fr; }
    .footer-bottom { flex-direction: column; gap: 0.75rem; text-align: center; }
    .footer-bottom__left { justify-content: center; flex-direction: column; gap: 0.35rem; }
    .footer-admin-gate { position: absolute; right: 0; bottom: 0; }
}

/* Price calculator (public) */
.calculator-section { padding-top: 0; }

.calculator-card {
    max-width: 820px;
    margin-inline: auto;
    background: #fff;
    border: 1px solid var(--border-subtle);
    border-radius: 20px;
    padding: clamp(1.75rem, 4vw, 2.5rem);
    box-shadow: 0 20px 60px rgba(27, 108, 168, 0.1);
}

.calculator-form__intro h2 {
    font-family: var(--font-display);
    font-size: 1.75rem;
    font-weight: 500;
    margin-bottom: 0.5rem;
}

.calculator-form__intro p {
    color: var(--text-muted);
    margin-bottom: 1.75rem;
}

.calculator-form__grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.25rem;
    margin-bottom: 1.75rem;
}

.calc-field label {
    display: block;
    font-size: 0.72rem;
    font-weight: 600;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--accent-blue);
    margin-bottom: 0.45rem;
}

.calc-field input,
.calc-field select {
    width: 100%;
    padding: 0.85rem 1rem;
    border: 1px solid var(--border-subtle);
    border-radius: 12px;
    font-family: var(--font-body);
    font-size: 1rem;
    background: var(--bg-soft);
    transition: border-color var(--transition), box-shadow var(--transition);
}

.calc-field input:focus,
.calc-field select:focus {
    outline: none;
    border-color: var(--accent-blue);
    box-shadow: 0 0 0 3px rgba(27, 108, 168, 0.12);
    background: #fff;
}

.calc-input-wrap {
    display: flex;
    align-items: stretch;
}

.calc-input-wrap input {
    border-top-right-radius: 0;
    border-bottom-right-radius: 0;
    flex: 1;
}

.calc-input-unit {
    display: flex;
    align-items: center;
    padding: 0 1rem;
    font-size: 0.8rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--accent-blue);
    background: var(--bg-secondary);
    border: 1px solid var(--border-subtle);
    border-left: none;
    border-radius: 0 12px 12px 0;
}

.btn-calc-primary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.65rem;
    width: 100%;
    padding: 1rem 1.5rem;
    border: none;
    border-radius: 14px;
    font-family: var(--font-body);
    font-size: 1rem;
    font-weight: 700;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: #fff;
    cursor: pointer;
    background: linear-gradient(135deg, var(--accent-blue) 0%, var(--accent-light) 100%);
    box-shadow: 0 8px 28px rgba(27, 108, 168, 0.35);
    transition: transform 0.2s ease, box-shadow 0.2s ease, opacity 0.2s ease;
}

.btn-calc-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 36px rgba(27, 108, 168, 0.42);
}

.btn-calc-primary:disabled,
.btn-calc-primary.is-loading {
    opacity: 0.75;
    cursor: wait;
    transform: none;
}

.btn-calc-primary__icon {
    font-size: 1.15rem;
    line-height: 1;
}

.calculator-result {
    margin-top: 2rem;
    padding-top: 2rem;
    border-top: 1px dashed var(--border-subtle);
    opacity: 0;
    transform: translateY(8px);
    transition: opacity 0.35s ease, transform 0.35s ease;
}

.calculator-result.is-visible {
    opacity: 1;
    transform: translateY(0);
}

.calculator-result__label {
    font-size: 0.72rem;
    font-weight: 600;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: var(--accent-blue);
    margin-bottom: 1rem;
}

.calculator-result__prices {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

.calculator-result__box {
    padding: 1.25rem 1.5rem;
    border-radius: 16px;
    border: 1px solid var(--border-subtle);
}

.calculator-result__box--primary {
    background: linear-gradient(145deg, rgba(27, 108, 168, 0.08) 0%, rgba(77, 163, 217, 0.12) 100%);
    border-color: rgba(27, 108, 168, 0.2);
}

.calculator-result__box--gray {
    background: var(--bg-soft);
}

.calculator-result__title {
    display: block;
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--text-muted);
    margin-bottom: 0.35rem;
}

.calculator-result__amount {
    font-family: var(--font-display);
    font-size: clamp(1.75rem, 4vw, 2.25rem);
    font-weight: 600;
    color: var(--accent-blue);
}

.calculator-result__box--gray .calculator-result__amount {
    color: var(--text-muted);
}

.calculator-result__note {
    margin-top: 1rem;
    font-size: 0.82rem;
    color: var(--text-muted);
}

/* Product catalog cards (2-column grid) */
.product-catalog-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: clamp(1.5rem, 3vw, 2.5rem);
}

.product-catalog-grid--home {
    margin-top: 0.5rem;
}

.product-card {
    display: block;
    background: #fff;
    border: 1px solid var(--border-subtle);
    border-radius: 16px;
    overflow: hidden;
    box-shadow: 0 8px 32px rgba(27, 108, 168, 0.08);
    transition: transform var(--transition), box-shadow var(--transition);
}

.product-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 16px 48px rgba(27, 108, 168, 0.14);
}

.product-card__image {
    aspect-ratio: 4/5;
    overflow: hidden;
    background: var(--bg-soft);
    display: flex;
    align-items: center;
    justify-content: center;
}

.product-card__image img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    object-position: center;
    padding: 0.5rem;
    transition: transform 0.6s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.product-card:hover .product-card__image img {
    transform: scale(1.02);
}

.product-card__placeholder {
    width: 100%;
    height: 100%;
    background: linear-gradient(145deg, var(--bg-secondary) 0%, var(--bg-soft) 100%);
}

.product-card__body {
    padding: 1.25rem 1.35rem 1.5rem;
}

.product-card__title {
    font-family: var(--font-display);
    font-size: clamp(1.35rem, 2.5vw, 1.75rem);
    font-weight: 400;
    margin: 0.35rem 0 0.65rem;
    transition: color var(--transition);
}

.product-card:hover .product-card__title {
    color: var(--accent-blue);
}

.product-card__text {
    font-size: 0.92rem;
    color: var(--text-muted);
    line-height: 1.6;
    margin-bottom: 0.85rem;
}

.product-card__price {
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--accent-blue);
    margin: 0;
}

.product-card__price--muted {
    font-size: 0.88rem;
    font-weight: 600;
    color: var(--text-muted);
}

.product-detail-hero-price {
    font-size: 1.35rem !important;
    font-weight: 700;
    color: var(--accent-blue) !important;
}

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

@media (max-width: 640px) {
    .calculator-form__grid,
    .calculator-result__prices {
        grid-template-columns: 1fr;
    }
}

/* Product catalog */
.product-card-size {
    font-size: 0.82rem;
    color: var(--text-muted);
    margin-top: 0.35rem;
}

.product-detail {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: clamp(2rem, 4vw, 4rem);
    align-items: start;
}

.product-gallery__viewer {
    position: relative;
}

.product-gallery__main {
    border-radius: 16px;
    overflow: hidden;
    background: var(--bg-soft);
    border: 1px solid var(--border-subtle);
    min-height: 320px;
    max-height: min(72vh, 720px);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1rem;
}

.product-gallery__main img {
    width: 100%;
    height: auto;
    max-height: min(68vh, 680px);
    object-fit: contain;
    object-position: center;
}

.product-gallery__nav {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    z-index: 2;
    width: 44px;
    height: 44px;
    border: none;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.82);
    color: var(--accent-blue);
    box-shadow: 0 4px 18px rgba(27, 108, 168, 0.18);
    backdrop-filter: blur(6px);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.65rem;
    line-height: 1;
    opacity: 0.75;
    transition: opacity var(--transition), transform var(--transition), background var(--transition);
}

.product-gallery__nav:hover {
    opacity: 1;
    background: #fff;
    transform: translateY(-50%) scale(1.05);
}

.product-gallery__nav--prev { left: 0.75rem; }
.product-gallery__nav--next { right: 0.75rem; }

.product-gallery__counter {
    position: absolute;
    right: 1rem;
    bottom: 1rem;
    z-index: 2;
    padding: 0.35rem 0.7rem;
    border-radius: 999px;
    background: rgba(15, 23, 42, 0.55);
    color: #fff;
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.06em;
}

.product-gallery__thumbs {
    display: flex;
    gap: 0.65rem;
    margin-top: 0.85rem;
    flex-wrap: wrap;
}

.product-gallery__thumb {
    border: 2px solid transparent;
    border-radius: 10px;
    overflow: hidden;
    padding: 0;
    cursor: pointer;
    width: 72px;
    height: 72px;
    background: var(--bg-soft);
}

.product-gallery__thumb.is-active {
    border-color: var(--accent-blue);
}

.product-gallery__thumb img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    object-position: center;
    background: var(--bg-soft);
}

.product-detail__lead {
    font-size: 1.1rem;
    color: var(--text-muted);
    margin-bottom: 1.5rem;
}

.product-specs {
    margin-bottom: 1.75rem;
    padding: 1.25rem;
    background: var(--bg-soft);
    border-radius: 14px;
    border: 1px solid var(--border-subtle);
}

.product-specs h3,
.product-detail__block h3 {
    font-family: var(--font-display);
    font-size: 1.35rem;
    margin-bottom: 0.75rem;
}

.product-specs__grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.75rem 1.5rem;
}

.product-specs__grid dt {
    font-size: 0.72rem;
    font-weight: 600;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--accent-blue);
}

.product-specs__grid dd {
    font-weight: 600;
    margin: 0.15rem 0 0;
}

.product-detail__block {
    margin-bottom: 1.5rem;
}

.product-detail__actions {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    margin-top: 2rem;
}

@media (max-width: 900px) {
    .product-detail {
        grid-template-columns: 1fr;
    }

    .product-gallery__nav {
        width: 38px;
        height: 38px;
        font-size: 1.4rem;
    }
}

/* Floating WhatsApp iletişim */
.whatsapp-fab {
    position: fixed;
    right: 1.25rem;
    bottom: 1.25rem;
    z-index: 120;
    display: inline-flex;
    align-items: center;
    gap: 0.45rem;
    padding: 0.65rem 1rem;
    border-radius: 999px;
    background: rgba(37, 211, 102, 0.95);
    color: #fff;
    font-size: 0.78rem;
    font-weight: 700;
    letter-spacing: 0.04em;
    box-shadow: 0 8px 28px rgba(37, 211, 102, 0.35);
    border: 1px solid rgba(255, 255, 255, 0.25);
    backdrop-filter: blur(8px);
    transition: transform var(--transition), box-shadow var(--transition), background var(--transition);
}

.whatsapp-fab:hover {
    color: #fff;
    background: #20bd5a;
    transform: translateY(-2px);
    box-shadow: 0 12px 32px rgba(37, 211, 102, 0.42);
}

.whatsapp-fab__icon {
    width: 1.35rem;
    height: 1.35rem;
    flex-shrink: 0;
}