/* ===========================
   INCA — Engineered Ceramic Materials
   Styles
   =========================== */

/* --- CSS Variables --- */
:root {
    /* Brand color: #D3D3FF — used for backgrounds and accents */
    --brand: #D3D3FF;
    --primary: #6E6EB8;          /* buttons, links, interactive on white */
    --primary-dark: #5A5AA0;     /* hover states on white */
    --primary-darker: #4A4A8A;   /* deep accents */
    --primary-light: #B0B0F0;    /* lighter accents */
    --primary-lighter: #E3E3FF;  /* icon backgrounds, hover bg */
    --primary-lightest: #F0F0FF; /* very subtle bg tint */
    --accent: #7878C8;           /* secondary interactive */
    --accent-light: #D3D3FF;     /* the brand color as accent */
    --white: #FFFFFF;
    --bg: #FAFAFF;
    --text: #1E1B4B;
    --text-secondary: #4B5563;
    --text-light: #9CA3AF;
    --border: #E5E7EB;
    --shadow: rgba(110, 110, 184, 0.1);
    --shadow-strong: rgba(110, 110, 184, 0.18);
    --radius: 12px;
    --radius-lg: 20px;
    --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --font: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
    scroll-padding-top: 96px;
}

body {
    font-family: var(--font);
    color: var(--text);
    background: var(--white);
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

.section[id],
.hero[id],
.frit-hero[id],
.grit-hero[id] {
    scroll-margin-top: 96px;
}

/* --- Container --- */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* --- Section --- */
.section {
    padding: 120px 0;
}

.section__header {
    text-align: center;
    max-width: 640px;
    margin: 0 auto 64px;
}

.section__label {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--accent);
    margin-bottom: 16px;
}

/* Numbered label prefix — editorial style (Sicer-inspired) */
.section__label .section__num {
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--primary-light);
    opacity: 0.6;
}

.section__label--light .section__num {
    color: rgba(255, 255, 255, 0.4);
}

.section__label--light {
    color: var(--primary-light);
}

.section__title {
    font-size: clamp(2rem, 4vw, 2.75rem);
    font-weight: 800;
    line-height: 1.15;
    margin-bottom: 16px;
    color: var(--text);
    text-wrap: balance;
}

.section__title--light {
    color: var(--white);
}

.section__subtitle {
    font-size: 1.1rem;
    color: var(--text-secondary);
    line-height: 1.7;
    text-wrap: pretty;
}

.section__subtitle--light {
    color: rgba(255, 255, 255, 0.7);
}

/* --- Buttons --- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 14px 32px;
    border-radius: 50px;
    font-family: var(--font);
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition);
    border: 2px solid transparent;
}

.btn--primary {
    background: var(--white);
    color: var(--primary);
    border-color: var(--white);
    font-weight: 700;
}

.btn--primary:hover {
    background: var(--primary-lightest);
    border-color: var(--primary-lightest);
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.15);
}

/* On light backgrounds, flip the button */
.products .btn--primary,
.contact .btn--primary,
.about .btn--primary {
    background: var(--primary);
    color: var(--white);
    border-color: var(--primary);
}

.products .btn--primary:hover,
.contact .btn--primary:hover,
.about .btn--primary:hover {
    background: var(--primary-dark);
    border-color: var(--primary-dark);
    box-shadow: 0 8px 30px var(--shadow-strong);
}

.btn--outline {
    background: rgba(255, 255, 255, 0.08);
    color: var(--white);
    border-color: rgba(255, 255, 255, 0.55);
}

.btn--outline:hover {
    background: rgba(255, 255, 255, 0.14);
    border-color: var(--white);
    transform: translateY(-2px);
}

.btn--outline-dark {
    background: transparent;
    color: #fff;
    border: 2px solid rgba(255, 255, 255, 0.35);
}

.btn--outline-dark:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: #fff;
    transform: translateY(-2px);
}

.btn--full {
    width: 100%;
}

/* ===========================
   NAVIGATION
   =========================== */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 20px 0;
    transition: all var(--transition);
}

.nav--scrolled {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    padding: 12px 0;
    box-shadow: 0 2px 20px var(--shadow);
}

.nav__container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav__logo {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 1.6rem;
    font-weight: 900;
    letter-spacing: 0.08em;
    color: var(--white);
    transition: color var(--transition);
}

.nav__logo-icon {
    width: 32px;
    height: 32px;
    flex-shrink: 0;
}

.nav--scrolled .nav__logo {
    color: var(--text);
}

.nav__menu {
    display: flex;
    align-items: center;
    gap: 8px;
}

.nav__link {
    padding: 8px 16px;
    font-size: 0.9rem;
    font-weight: 500;
    color: rgba(255, 255, 255, 0.85);
    border-radius: 50px;
    transition: all var(--transition);
}

.nav__link:hover {
    color: var(--white);
    background: rgba(255, 255, 255, 0.1);
}

.nav--scrolled .nav__link {
    color: var(--text-secondary);
}

.nav--scrolled .nav__link:hover {
    color: var(--primary);
    background: var(--primary-lightest);
}

.nav__cta {
    background: rgba(255, 255, 255, 0.2) !important;
    color: var(--white) !important;
    padding: 10px 24px;
    border: 1px solid rgba(255, 255, 255, 0.4) !important;
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
}

.nav__cta:hover {
    background: rgba(255, 255, 255, 0.3) !important;
    color: var(--white) !important;
    border-color: rgba(255, 255, 255, 0.6) !important;
}

.nav--scrolled .nav__cta {
    background: var(--primary) !important;
    color: var(--white) !important;
    border-color: var(--primary) !important;
    backdrop-filter: none;
}

.nav--scrolled .nav__cta:hover {
    background: var(--primary-dark) !important;
    border-color: var(--primary-dark) !important;
}

/* Hamburger */
.nav__toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
    z-index: 1001;
}

.nav__toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--white);
    border-radius: 2px;
    transition: all var(--transition);
}

.nav--scrolled .nav__toggle span {
    background: var(--text);
}

.nav__toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.nav__toggle.active span:nth-child(2) {
    opacity: 0;
}

.nav__toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

/* ===========================
   HERO
   =========================== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #7B7BC8 0%, #9B9BD8 35%, #C3C3F0 65%, #E3E3FF 100%);
    overflow: hidden;
}

/* Canvas for the JS-drawn intro wave animation */
.hero__wave-canvas {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    z-index: 3;
    pointer-events: none;
}

.hero__bg-pattern {
    position: absolute;
    inset: 0;
    z-index: 1;
    background:
        radial-gradient(circle at 25% 35%, rgba(255, 255, 255, 0.08) 0%, transparent 50%),
        radial-gradient(circle at 75% 65%, rgba(255, 255, 255, 0.06) 0%, transparent 50%),
        radial-gradient(circle at 50% 50%, rgba(255, 255, 255, 0.04) 0%, transparent 70%);
    animation: heroShimmer 8s ease-in-out infinite alternate;
}

/* Dot-pattern overlay inspired by Younexa */
.hero__bg-pattern::after {
    content: '';
    position: absolute;
    inset: 0;
    background-image: radial-gradient(rgba(255, 255, 255, 0.12) 1px, transparent 1px);
    background-size: 24px 24px;
    pointer-events: none;
}

@keyframes heroShimmer {
    0% { opacity: 0.7; }
    100% { opacity: 1; }
}



.hero__content {
    position: relative;
    z-index: 2;
    text-align: center;
    padding: 0 24px;
    max-width: 800px;
}

.hero__badge {
    display: inline-block;
    padding: 8px 20px;
    max-width: min(92vw, 520px);
    background: rgba(255, 255, 255, 0.14);
    border: 1px solid rgba(255, 255, 255, 0.28);
    border-radius: 50px;
    font-size: 0.8rem;
    font-weight: 500;
    color: rgba(255, 255, 255, 0.92);
    letter-spacing: 0.03em;
    line-height: 1.45;
    text-wrap: balance;
    margin-bottom: 32px;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

.hero__title {
    font-size: clamp(4rem, 10vw, 7rem);
    font-weight: 900;
    color: var(--white);
    letter-spacing: 0.06em;
    line-height: 1;
    margin-bottom: 8px;
    text-shadow: 0 4px 40px rgba(0, 0, 0, 0.25);
    text-wrap: balance;
}

.hero__tagline {
    font-size: clamp(1.1rem, 2.5vw, 1.5rem);
    font-weight: 300;
    color: rgba(255, 255, 255, 0.9);
    letter-spacing: 0.15em;
    text-transform: uppercase;
    margin-bottom: 20px;
    text-wrap: balance;
}

.hero__subtitle {
    font-size: 1.1rem;
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: 40px;
    line-height: 1.6;
    text-wrap: pretty;
}

.hero__actions {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
}


/* ===========================
   ABOUT
   =========================== */
.about {
    background: var(--bg);
}

.about__grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
}

.about__text .section__label {
    display: inline-block;
}

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

.about__description {
    font-size: 1.05rem;
    color: var(--text-secondary);
    margin-bottom: 20px;
    line-height: 1.8;
}

.about__highlights {
    display: flex;
    flex-direction: column;
    gap: 20px;
    margin-top: 32px;
}

.about__highlight {
    display: flex;
    align-items: center;
    gap: 16px;
}

.about__highlight-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--primary-lightest);
    color: var(--primary);
    border-radius: 12px;
    flex-shrink: 0;
}

.about__highlight strong {
    display: block;
    font-size: 1rem;
    color: var(--text);
}

.about__highlight span {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

/* About visual — image */
.about__visual {
    display: flex;
    justify-content: center;
}

.about__image-wrapper {
    position: relative;
    width: 100%;
}

.about__image {
    width: 100%;
    height: auto;
    border-radius: var(--radius-lg);
    object-fit: cover;
    aspect-ratio: 4/5;
    object-position: top;
    box-shadow: 0 20px 60px var(--shadow-strong);
}

.about__image-accent {
    display: none;
}

/* ===========================
   PRODUCTS
   =========================== */
.products {
    background: var(--white);
}

.products__grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 32px;
}

.product-card {
    position: relative;
    background: var(--white);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 0;
    overflow: hidden;
    transition: all var(--transition);
    transform-style: preserve-3d;
    will-change: transform;
}

.product-card__image {
    width: 100%;
    height: 220px;
    overflow: hidden;
}

.product-card__image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.product-card:hover .product-card__image img {
    transform: scale(1.05);
}

.product-card__content {
    padding: 36px 36px 40px;
}

.product-card:hover {
    border-color: var(--primary-light);
    box-shadow: 0 20px 60px var(--shadow), 0 0 0 1px var(--primary-light);
}

.product-card__new-badge {
    position: absolute;
    top: 24px;
    right: 24px;
    padding: 5px 16px;
    background: var(--text);
    color: var(--white);
    font-size: 0.72rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    border-radius: 50px;
    z-index: 2;
}

.product-card__icon {
    width: 72px;
    height: 72px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--primary-lightest);
    color: var(--primary);
    border-radius: 16px;
    margin-bottom: 24px;
}

.product-card__title {
    font-size: 1.5rem;
    font-weight: 800;
    margin-bottom: 4px;
    color: var(--text);
}

.product-card__alt-name {
    font-weight: 400;
    color: var(--text-secondary);
}

.product-card__badge {
    display: inline-block;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--accent);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: 16px;
}

.product-card__description {
    font-size: 1rem;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 20px;
}

.product-card__features {
    margin-bottom: 24px;
}

.product-card__features li {
    position: relative;
    padding-left: 20px;
    font-size: 0.92rem;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

.product-card__features li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 8px;
    width: 8px;
    height: 8px;
    background: var(--accent);
    border-radius: 50%;
}

.product-card__link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--primary);
    transition: all var(--transition);
}

.product-card__link:hover {
    color: var(--primary-dark);
    gap: 12px;
}

.product-card__link svg {
    width: 18px;
    height: 18px;
    transition: transform var(--transition);
}

.product-card__link:hover svg {
    transform: translateX(3px);
}

/* ===========================
   SURFACE EFFECTS (Stripe Press-Inspired)
   =========================== */
.surface-effects {
    position: relative;
    background: #3d3a6e;
    overflow: hidden;
    padding: 60px 0 80px;
}

.surface-effects .section__header {
    margin-bottom: 2px;
}

.surface-effects__bg {
    position: absolute;
    inset: 0;
    background: #3d3a6e;
    transition: background 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    z-index: 0;
}

.surface-effects .container {
    position: relative;
    z-index: 1;
}

/* The content area holds both views in the same space */
.surface-effects__content {
    position: relative;
    transition: min-height 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Fade out the section header when detail is open */
.surface-effects .section__header {
    transition: opacity 0.4s ease, transform 0.4s ease, max-height 0.5s ease, margin-bottom 0.5s ease;
    max-height: 300px;
    overflow: hidden;
}

.surface-effects--detail-open .section__header.visible,
.surface-effects--detail-open .section__header {
    opacity: 0 !important;
    transform: translateY(-15px) !important;
    pointer-events: none;
    max-height: 0;
    margin-bottom: 0 !important;
}

/* Book Stack Layout */
.book-stack {
    display: flex;
    flex-direction: column;
    gap: 2px;
    max-width: 820px;
    margin: -18px auto 0;
    perspective: 1200px;
    transition: opacity 0.5s cubic-bezier(0.4, 0, 0.2, 1),
                transform 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

.book-stack--hiding {
    opacity: 0;
    transform: scale(0.97);
    pointer-events: none;
}

/* Individual Book */
.book-spine {
    border: none;
    background: none;
    padding: 0;
    display: block;
    width: 100%;
    position: relative;
    text-align: left;
    cursor: pointer;
    font-family: inherit;
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 0.7s ease, transform 0.7s ease;
    outline: none;
}

.book-spine:focus-visible .book-spine__face {
    outline: 2px solid rgba(255, 255, 255, 0.5);
    outline-offset: 2px;
}

.book-spine.visible {
    opacity: 1;
    transform: translateY(0);
}

.book-spine:nth-child(1) { transition-delay: 0s; z-index: 5; }
.book-spine:nth-child(2) { transition-delay: 0.1s; z-index: 4; }
.book-spine:nth-child(3) { transition-delay: 0.2s; z-index: 3; }
.book-spine:nth-child(4) { transition-delay: 0.3s; z-index: 2; }
.book-spine:nth-child(5) { transition-delay: 0.4s; z-index: 1; }

.book-spine:hover,
.book-spine:focus-visible,
.book-spine:active {
    z-index: 10;
}

/* Pull books closer — reduces gap between front faces */
.book-spine + .book-spine {
    margin-top: -82px;
}

/* 3D Wrapper — tilted to show cover top */
.book-spine__3d {
    position: relative;
    transform-style: preserve-3d;
    transform: rotateX(12deg);
    /* No transition here — scroll-driven tilt must be instant */
}

/* No transition on 3D wrapper — scroll-driven tilt must always be instant */

/* Book Cover (top face) — visible via perspective tilt.
   Higher perspective (1000px) + gentler angle (50°) = more visible surface area
   and sharper image. The browser rasterizes at CSS pixel dimensions before the
   GPU projects through the 3D transform — a larger element + less compression
   = more pixel data for the GPU to work with.
   DO NOT add will-change, backface-visibility, or translateZ(0) — they lock
   the raster bitmap and degrade quality. */
.book-spine__top {
    height: 200px;
    border-radius: 4px 4px 0 0;
    transform-origin: bottom center;
    transform: perspective(1000px) rotateX(50deg);
    position: relative;
    z-index: 0;
    background: linear-gradient(160deg,
        var(--book-accent) 0%,
        var(--book-color) 60%
    );
    background-size: cover;
    background-position: center;
    image-rendering: auto;
    overflow: hidden;
}

/* Default cover overlay — subtle light catch only */
.book-spine__top::before {
    content: '';
    position: absolute;
    inset: 0;
    background:
        radial-gradient(ellipse at 30% 35%, rgba(255,255,255,0.06) 0%, transparent 60%);
    pointer-events: none;
    z-index: 1;
}

/* Glass Grit Relief — transparent peaks & valleys that give off brilliant sparkle.
   The glass grit layer is physically transparent (like glass). It produces
   sparkle from light refracting through micro-peaks and valleys. The overlay
   is fully transparent with only bright specular highlights visible — the
   tile image shows through perfectly dark and clear. */
.grit-relief {
    position: absolute;
    inset: 0;
    z-index: 1;
    pointer-events: none;
    border-radius: inherit;
    /* No background-color — fully transparent. Only the radial gradient
       highlights are visible, like light catching glass peaks. */

    background-image:
        /* Broad glaze sheen — directional overhead light on wet glass surface */
        linear-gradient(
            165deg,
            rgba(255, 255, 255, 0.15) 0%,
            rgba(255, 255, 255, 0.03) 30%,
            transparent 55%,
            transparent 100%
        ),
        /* Specular peaks A — round glass grit particles catching light */
        radial-gradient(circle 3.5px at 42% 38%,
            rgba(255, 255, 255, 0.5) 0%,
            rgba(255, 255, 255, 0.12) 40%,
            transparent 100%
        ),
        /* Specular peaks B — different prime tile size, offset */
        radial-gradient(circle 3px at 30% 28%,
            rgba(255, 255, 255, 0.45) 0%,
            rgba(255, 255, 255, 0.08) 45%,
            transparent 100%
        ),
        /* Specular peaks C — third prime, varied size */
        radial-gradient(circle 4px at 55% 42%,
            rgba(255, 255, 255, 0.35) 0%,
            rgba(255, 255, 255, 0.06) 50%,
            transparent 100%
        ),
        /* Micro-glints — very tiny bright refraction pinpoints */
        radial-gradient(circle 1.5px at 38% 22%,
            rgba(255, 255, 255, 0.55) 0%,
            transparent 100%
        );

    background-size:
        100% 100%,     /* overhead sheen */
        17px 17px,     /* specular peaks A */
        23px 23px,     /* specular peaks B */
        29px 29px,     /* specular peaks C */
        11px 11px;     /* micro-glints */

    background-repeat: repeat;
    opacity: 0.9;
}

/* Remove old SVG filter approach from ::before — it was invisible at 58° */
[data-finish="sugar"] .book-spine__top::before {
    background: none;
    filter: none;
    opacity: 0;
}

/* Individual sparkle particle — a single glass facet reflection */
.sparkle-dot {
    position: absolute;
    border-radius: 50%;
    background: white;
    pointer-events: none;
    opacity: 0;
    will-change: opacity;
    z-index: 2;
    animation: facetBlink var(--dur) var(--ease) var(--delay) infinite;
    /* Glow halo — makes dots visible even at small sizes */
    box-shadow:
        0 0 calc(var(--glow) * 1px) calc(var(--glow) * 0.3px) rgba(255, 255, 255, calc(var(--peak) * 0.7)),
        0 0 calc(var(--glow) * 2px) 0px rgba(255, 255, 255, calc(var(--peak) * 0.25));
}

/* Blink keyframes — specular reflection model:
   Light sweeps across surface; each facet briefly catches it.
   Longer "on" phase = more particles visible at once = more brilliance */
@keyframes facetBlink {
    0%, 100% { opacity: 0; }
    25% { opacity: 0; }
    40% { opacity: 0.8; }
    50% { opacity: 1; }
    60% { opacity: 0.8; }
    75% { opacity: 0; }
}

/* Slow-blink facets (shallow angle, stays in catch zone longer) */
@keyframes facetBlinkSlow {
    0%, 100% { opacity: 0; }
    15% { opacity: 0; }
    30% { opacity: 0.6; }
    50% { opacity: 1; }
    70% { opacity: 0.6; }
    85% { opacity: 0; }
}

/* Quick-flash facets (steep angle, barely catches) */
@keyframes facetBlinkQuick {
    0%, 100% { opacity: 0; }
    42% { opacity: 0; }
    50% { opacity: 1; }
    58% { opacity: 0; }
}

/* Edge line between cover and spine — default: clean straight edge */
.book-spine__top::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: rgba(0, 0, 0, 0.2);
}

/* Sugar tile: bumpy edge — glass grit peaks and valleys visible from the side */
[data-finish="sugar"] .book-spine__top::after {
    height: 3px;
    bottom: -1px;
    background: linear-gradient(to bottom, rgba(0,0,0,0.15), rgba(180,170,155,0.6));
    filter: url(#bumpEdge);
    opacity: 0.7;
}

/* Spine Face (front) — ceramic tile body / bisque */
.book-spine__face {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0;
    padding: 13px 28px;
    background: #b3aca0;
    border-radius: 0 0 2px 2px;
    /* Bottom edge merged into border */
    border-bottom: 2px solid #958e82;
    box-shadow:
        0 1px 3px rgba(0, 0, 0, 0.18),
        0 4px 10px rgba(0, 0, 0, 0.1),
        inset 0 0.5px 0 rgba(255, 255, 255, 0.05);
    position: relative;
    z-index: 1;
    transition: none;
    overflow: hidden;
}

/* Grain texture overlay — SVG noise applied only to this layer, not text */
.book-spine__face::before {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: inherit;
    background:
        radial-gradient(circle at 22% 28%, rgba(245, 239, 227, 0.09) 0%, transparent 24%),
        radial-gradient(circle at 63% 54%, rgba(120, 112, 101, 0.06) 0%, transparent 26%),
        #b3aca0;
    filter: url(#grain);
    opacity: 0.18;
    pointer-events: none;
}

/* ::after freed up for refraction — default: nothing */
.book-spine__face::after {
    content: '';
    position: absolute;
    inset: 0;
    pointer-events: none;
    opacity: 0;
}

/* Sugar tile spine: refracted cover image bleeds through the bisque edge.
   The glazed surface creates subtle color bleeding visible on the tile body.
   Duplicates the cover image, flips it, blurs + distorts it via SVG filter. */
[data-finish="sugar"] .book-spine__face::after {
    background: url('../img/tile-sugar.webp') center/cover no-repeat;
    transform: scaleY(-1);
    filter: none;
    opacity: 0;
    mix-blend-mode: normal;
}

/* Etched text — number */
.book-spine__number {
    font-size: 0.7rem;
    font-weight: 800;
    letter-spacing: 0.15em;
    color: rgba(88, 80, 69, 0.86);
    position: absolute;
    left: 28px;
    top: 50%;
    min-width: 0;
    transform: translateY(-50%);
    text-shadow: 0 1px 0 rgba(255, 255, 255, 0.2);
}

/* Etched text — title: debossed into the clay body */
.book-spine__title {
    font-size: 1.05rem;
    font-weight: 900;
    color: #4a4135;
    flex: 0 1 auto;
    width: 100%;
    padding: 0 26px;
    text-align: center;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    text-shadow: 0 1px 0 rgba(255, 255, 255, 0.22);
}

/* Etched tag — like a stamp pressed into clay */
.book-spine__tag {
    display: none;
}

/* Hover: gentle lift via the spine button itself */
.book-spine {
    transition: opacity 0.7s ease, transform 0.7s ease;
}
.book-spine:hover {
    transform: translateY(-4px);
}

.book-spine:hover .book-spine__face {
    box-shadow:
        0 1px 3px rgba(0, 0, 0, 0.18),
        0 4px 10px rgba(0, 0, 0, 0.1),
        inset 0 0.5px 0 rgba(255, 255, 255, 0.05);
}

.book-spine:hover .book-spine__tag {
    color: #3b3328;
}

/* Detail View — absolutely positioned in same frame */
.book-detail {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: opacity 0.5s cubic-bezier(0.4, 0, 0.2, 1),
                transform 0.5s cubic-bezier(0.4, 0, 0.2, 1),
                visibility 0s linear 0.6s;
    padding: 0 24px;
    max-width: 1200px;
    margin: 0 auto;
    z-index: 2;
}

.book-detail.active {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
    transition: opacity 0.6s cubic-bezier(0.4, 0, 0.2, 1) 0.25s,
                transform 0.6s cubic-bezier(0.4, 0, 0.2, 1) 0.25s,
                visibility 0s linear 0s;
}

.book-detail__back {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: none;
    border: none;
    color: rgba(255, 255, 255, 0.5);
    font-family: inherit;
    font-size: 0.85rem;
    font-weight: 500;
    cursor: pointer;
    padding: 8px 0;
    margin-bottom: 48px;
    transition: color 0.3s ease, gap 0.3s ease;
    letter-spacing: 0.02em;
}

.book-detail__back:hover {
    color: #fff;
    gap: 12px;
}

.book-detail__back svg {
    width: 16px;
    height: 16px;
    transition: transform 0.3s ease;
}

.book-detail__back:hover svg {
    transform: translateX(-3px);
}

.book-detail__grid {
    display: grid;
    grid-template-columns: 320px 1fr;
    gap: 72px;
    align-items: start;
    max-width: 900px;
    margin: 0 auto;
}

/* 3D Book Cover */
.book-detail__cover {
    display: flex;
    justify-content: center;
}

.book-detail__cover-3d {
    position: relative;
    width: 260px;
    height: 360px;
    transform-style: preserve-3d;
    transform: perspective(1000px) rotateY(-18deg) rotateX(4deg);
    transition: transform 0.8s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.book-detail.active .book-detail__cover-3d {
    transform: perspective(1000px) rotateY(-15deg) rotateX(3deg);
}

.book-detail__cover-front {
    position: absolute;
    width: 100%;
    height: 100%;
    background: linear-gradient(160deg, var(--book-color), var(--book-accent));
    border-radius: 1px;
    box-shadow:
        12px 12px 40px rgba(0, 0, 0, 0.4),
        4px 4px 12px rgba(0, 0, 0, 0.2),
        inset 0 0 0 1px rgba(255, 255, 255, 0.06);
    backface-visibility: hidden;
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    padding: 32px;
    overflow: hidden;
    background-size: cover;
    background-position: center;
    image-rendering: -webkit-optimize-contrast;
}

/* Detail cover sparkle — added dynamically via JS class for sugar finish only */
.book-detail__cover-front::before {
    content: '';
    position: absolute;
    inset: 0;
    pointer-events: none;
    z-index: 1;
    opacity: 0;
}

/* Sugar sparkle on detail — JS particles handle the sparkle */
.book-detail__cover-front.sugar-sparkle::before {
    opacity: 0;
    background: none;
}

/* Light reflection on cover */
.book-detail__cover-front::after {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(
        ellipse at 30% 20%,
        rgba(255, 255, 255, 0.12) 0%,
        transparent 50%
    );
    pointer-events: none;
}

/* Book spine edge */
.book-detail__cover-spine {
    position: absolute;
    left: 0;
    top: 0;
    width: 28px;
    height: 100%;
    border-radius: 0;
    transform-origin: right center;
    transform: rotateY(-90deg);
    background: linear-gradient(to right,
        var(--book-color),
        rgba(0, 0, 0, 0.3)
    );
}

/* Page edges (visible on the right side of the cover) */
.book-detail__cover-3d::after {
    content: '';
    position: absolute;
    right: -3px;
    top: 2px;
    bottom: 2px;
    width: 6px;
    background: linear-gradient(to right,
        rgba(245, 240, 230, 0.6),
        rgba(235, 228, 215, 0.4)
    );
    border-radius: 0 1px 1px 0;
    transform: translateZ(-2px);
}

/* Detail Info */
.book-detail__label {
    display: inline-block;
    font-size: 0.78rem;
    font-weight: 900;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: rgba(255, 255, 255, 0.88);
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.24);
    margin-bottom: 16px;
}

.book-detail__label:empty {
    display: none;
}

.book-detail__title {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 800;
    color: #fff;
    margin-bottom: 14px;
    line-height: 1.1;
    letter-spacing: -0.01em;
}

.book-detail__subtitle {
    font-size: 1.05rem;
    color: rgba(255, 255, 255, 0.55);
    margin-bottom: 32px;
    line-height: 1.65;
}

.book-detail__description {
    font-size: 0.95rem;
    color: rgba(255, 255, 255, 0.38);
    line-height: 1.9;
    margin-bottom: 40px;
}

.book-detail__specs {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.book-detail__spec {
    font-size: 0.72rem;
    font-weight: 600;
    color: rgba(255, 255, 255, 0.55);
    padding: 6px 16px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 50px;
    background: rgba(255, 255, 255, 0.03);
    transition: border-color 0.3s ease, color 0.3s ease;
}

.book-detail__spec:hover {
    border-color: rgba(255, 255, 255, 0.25);
    color: rgba(255, 255, 255, 0.75);
}

/* Responsive */
@media (max-width: 768px) {
    .surface-effects { padding: 48px 0 60px; }
    .surface-effects .section__header { margin-bottom: 2px; }
    .book-stack { max-width: 100%; gap: 2px; margin-top: -12px; }
    .book-spine__face { padding: 11px 20px; }
    .book-spine__title { font-size: 0.95rem; padding: 0 22px; }
    .book-spine__number { font-size: 0.6rem; left: 20px; }
    .book-spine__top { height: 140px; transform: perspective(800px) rotateX(50deg); }
    .book-spine + .book-spine { margin-top: -34px; }

    .book-detail { padding: 0 16px; }
    .book-detail__grid { grid-template-columns: 1fr; gap: 32px; }
    .book-detail__cover-3d { width: 180px; height: 250px; }
    .book-detail__title { font-size: 1.75rem; }
    .book-detail__subtitle { font-size: 0.95rem; }
    .book-detail__description { font-size: 0.88rem; }
    .book-detail__back { margin-bottom: 20px; }
}

@media (max-width: 480px) {
    .surface-effects { padding: 40px 0 50px; }
    .surface-effects .section__header { margin-bottom: 0; }
    .book-stack { gap: 2px; margin-top: -8px; }
    .book-spine__face { padding: 10px 16px; }
    .book-spine__title { font-size: 0.85rem; padding: 0 18px; }
    .book-spine__number { left: 16px; }
    .book-spine__top { height: 100px; transform: perspective(600px) rotateX(48deg); }
    .book-spine__3d { transform: rotateX(10deg); }
    .book-spine + .book-spine { margin-top: -24px; }

    .book-detail__cover-3d { width: 140px; height: 196px; }
    .book-detail__back { font-size: 0.8rem; margin-bottom: 16px; }
    .book-detail__title { font-size: 1.4rem; }
    .book-detail__grid { gap: 20px; }
}

/* ===========================
   SUSTAINABILITY
   =========================== */
.sustainability {
    background: var(--white);
}

.sustainability__grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.sustainability__card {
    background: var(--white);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 36px 28px;
    text-align: center;
    transition: all var(--transition);
}

.sustainability__card:hover {
    border-color: var(--primary-light);
    transform: translateY(-4px);
    box-shadow: 0 12px 40px var(--shadow);
}

.sustainability__icon {
    width: 64px;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    background: var(--primary-lightest);
    color: var(--primary);
    border-radius: 16px;
}

.sustainability__card h3 {
    font-size: 1.05rem;
    font-weight: 700;
    margin-bottom: 10px;
    color: var(--text);
}

.sustainability__card p {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* ===========================
   CONTACT
   =========================== */
.contact {
    background: var(--white);
}

.contact__grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: start;
}

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

.contact__description {
    font-size: 1.05rem;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 32px;
}

.contact__details {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.contact__detail {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 0.95rem;
    color: var(--text-secondary);
}

.contact__detail svg {
    color: var(--accent);
    flex-shrink: 0;
}

/* Form */
.contact__form-wrapper {
    background: var(--bg);
    border-radius: var(--radius-lg);
    padding: 40px;
    border: 1px solid var(--border);
}

.form__group {
    margin-bottom: 16px;
}

.form__group input,
.form__group select,
.form__group textarea {
    width: 100%;
    padding: 14px 18px;
    font-family: var(--font);
    font-size: 0.95rem;
    color: var(--text);
    background: var(--white);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    transition: all var(--transition);
    outline: none;
}

.form__group input::placeholder,
.form__group textarea::placeholder {
    color: var(--text-light);
}

.form__group input:focus,
.form__group select:focus,
.form__group textarea:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(211, 211, 255, 0.3);
}

.form__group select {
    cursor: pointer;
    color: var(--text-light);
}

.form__group select:valid {
    color: var(--text);
}

.form__group textarea {
    resize: vertical;
    min-height: 100px;
}

/* ===========================
   FOOTER
   =========================== */
.footer {
    background: var(--text);
    color: rgba(255, 255, 255, 0.7);
    padding: 80px 0 32px;
}

.footer__grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 48px;
    margin-bottom: 48px;
}

.footer__logo {
    font-size: 1.6rem;
    font-weight: 900;
    letter-spacing: 0.08em;
    color: var(--white);
    margin-bottom: 8px;
}

.footer__tagline {
    font-size: 0.9rem;
    color: var(--accent-light);
    margin-bottom: 8px;
}

.footer__parent {
    font-size: 0.8rem;
    color: rgba(255, 255, 255, 0.4);
}

.footer__links h4 {
    font-size: 0.85rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--white);
    margin-bottom: 20px;
}

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

.footer__links a {
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.5);
    transition: color var(--transition);
}

.footer__links a:hover {
    color: var(--accent-light);
}

/* Newsletter in footer */
.footer__newsletter {
    margin-top: 24px;
}

.footer__newsletter p {
    font-size: 0.85rem;
    color: rgba(255, 255, 255, 0.5);
    margin-bottom: 12px;
}

.footer__newsletter-form {
    display: flex;
    gap: 0;
    max-width: 300px;
}

.footer__newsletter-form input {
    flex: 1;
    padding: 10px 14px;
    font-family: var(--font);
    font-size: 0.85rem;
    color: var(--white);
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.15);
    border-radius: 8px 0 0 8px;
    outline: none;
    transition: all var(--transition);
}

.footer__newsletter-form input::placeholder {
    color: rgba(255, 255, 255, 0.35);
}

.footer__newsletter-form input:focus {
    border-color: var(--primary-light);
    background: rgba(255, 255, 255, 0.12);
}

.footer__newsletter-form button {
    padding: 10px 16px;
    background: var(--primary);
    color: var(--white);
    border: 1px solid var(--primary);
    border-radius: 0 8px 8px 0;
    font-family: var(--font);
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition);
}

.footer__newsletter-form button:hover {
    background: var(--primary-dark);
}

/* Certification badges */
.footer__certs {
    display: flex;
    align-items: center;
    gap: 20px;
    padding: 24px 0;
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    margin-bottom: 24px;
    justify-content: center;
    flex-wrap: wrap;
}

.footer__cert {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 6px 16px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 8px;
    font-size: 0.75rem;
    font-weight: 600;
    color: rgba(255, 255, 255, 0.5);
    letter-spacing: 0.05em;
}

.footer__cert svg {
    width: 16px;
    height: 16px;
    opacity: 0.6;
}

.footer__bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 32px;
    text-align: center;
    font-size: 0.85rem;
    color: rgba(255, 255, 255, 0.3);
}

/* ===========================
   ANIMATIONS
   =========================== */
.animate-on-scroll {
    opacity: 1;
    transform: translateY(0);
    transition: opacity 0.7s ease, transform 0.7s ease;
}

.js-ready .animate-on-scroll {
    opacity: 0;
    transform: translateY(30px);
}

.js-ready .animate-on-scroll.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Staggered animation delays for grid children */
.animate-on-scroll[data-delay="1"] { transition-delay: 0.1s; }
.animate-on-scroll[data-delay="2"] { transition-delay: 0.2s; }
.animate-on-scroll[data-delay="3"] { transition-delay: 0.3s; }
.animate-on-scroll[data-delay="4"] { transition-delay: 0.4s; }

/* Slide-in from left variant */
.animate-on-scroll--left {
    opacity: 1;
    transform: translateX(0);
    transition: opacity 0.7s ease, transform 0.7s ease;
}

.js-ready .animate-on-scroll--left {
    opacity: 0;
    transform: translateX(-30px);
}

.js-ready .animate-on-scroll--left.visible {
    opacity: 1;
    transform: translateX(0);
}

/* Scale-up variant */
.animate-on-scroll--scale {
    opacity: 1;
    transform: scale(1);
    transition: opacity 0.7s ease, transform 0.7s ease;
}

.js-ready .animate-on-scroll--scale {
    opacity: 0;
    transform: scale(0.95);
}

.js-ready .animate-on-scroll--scale.visible {
    opacity: 1;
    transform: scale(1);
}

@media (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto;
    }

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

    .js-ready .animate-on-scroll,
    .js-ready .animate-on-scroll--left,
    .js-ready .animate-on-scroll--scale {
        opacity: 1 !important;
        transform: none !important;
    }
}

/* ===========================
   RESPONSIVE
   =========================== */
@media (max-width: 1024px) {
    .section { padding: 80px 0; }
    .about__grid { gap: 48px; }
    .contact__grid { gap: 48px; }
    .footer__grid { grid-template-columns: 1fr 1fr; gap: 32px; }
}

@media (max-width: 768px) {
    .section { padding: 72px 0; }
    .section__header { margin-bottom: 40px; }
    .section__title { font-size: 1.75rem; }
    .section__subtitle { font-size: 0.95rem; }

    .nav__logo { font-size: 1.2rem; }

    .nav__toggle {
        display: flex;
    }

    .nav__menu {
        position: fixed;
        top: 0;
        right: -100%;
        width: 280px;
        height: 100vh;
        flex-direction: column;
        background: rgba(255, 255, 255, 0.98);
        padding: 80px 32px 32px;
        gap: 4px;
        transition: right var(--transition);
        overflow-y: auto;
        box-shadow: -10px 0 30px rgba(0, 0, 0, 0.1);
        backdrop-filter: blur(20px);
        -webkit-backdrop-filter: blur(20px);
    }

    .nav__menu.active {
        right: 0;
    }

    .nav__menu .nav__link {
        color: var(--text);
        font-size: 1rem;
        padding: 12px 16px;
        width: 100%;
    }

    .nav__menu .nav__link:hover {
        background: var(--primary-lighter);
        color: var(--primary-dark);
    }

    .nav__menu .nav__cta {
        margin-top: 16px;
        text-align: center;
    }

    .hero { min-height: auto; padding: 100px 0 80px; }
    .hero::after { height: 50px; }
    .hero__content { padding: 0 20px; }
    .hero__title { font-size: 3.5rem; }
    .hero__tagline { font-size: 1rem; letter-spacing: 0.1em; margin-bottom: 12px; }
    .hero__subtitle { font-size: 0.9rem; margin-bottom: 24px; }
    .hero__badge { font-size: 0.68rem; padding: 7px 14px; margin-bottom: 16px; max-width: min(88vw, 320px); }

    .about__grid {
        grid-template-columns: 1fr;
        gap: 32px;
    }

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

    .about__text { text-align: center; }
    .about__description { font-size: 0.92rem; line-height: 1.7; margin-bottom: 14px; }

    .about__visual { order: -1; }
    .about__image { aspect-ratio: 16 / 10; object-position: center; }

    .about__highlights { gap: 14px; margin-top: 24px; max-width: 300px; margin-left: auto; margin-right: auto; text-align: left; }
    .about__highlight-icon { width: 40px; height: 40px; border-radius: 10px; }
    .about__highlight-icon svg { width: 18px; height: 18px; }
    .about__highlight strong { font-size: 0.9rem; }
    .about__highlight span { font-size: 0.82rem; }

    .products__grid {
        grid-template-columns: 1fr;
        gap: 24px;
    }

    .product-card__image { height: 200px; }
    .product-card__content { padding: 20px 18px 24px; }
    .product-card__icon { width: 40px; height: 40px; border-radius: 10px; margin-bottom: 12px; }
    .product-card__icon svg { width: 20px; height: 20px; }
    .product-card__title { font-size: 1.1rem; }
    .product-card__badge { font-size: 0.68rem; margin-bottom: 10px; }
    .product-card__description { font-size: 0.82rem; line-height: 1.6; margin-bottom: 14px; }
    .product-card__features { margin-bottom: 16px; }
    .product-card__features li { font-size: 0.8rem; margin-bottom: 5px; padding-left: 16px; }
    .product-card__features li::before { width: 6px; height: 6px; top: 7px; }
    .product-card__new-badge { top: 12px; right: 12px; font-size: 0.6rem; padding: 3px 10px; }

    .sustainability__grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 16px;
    }

    .sustainability__card { padding: 22px 16px; }
    .sustainability__icon { width: 48px; height: 48px; border-radius: 12px; margin-bottom: 14px; }
    .sustainability__icon svg { width: 22px; height: 22px; }
    .sustainability__card h3 { font-size: 0.92rem; margin-bottom: 8px; }
    .sustainability__card p { font-size: 0.82rem; }

    .contact__grid {
        grid-template-columns: 1fr;
        gap: 32px;
    }

    .contact__info { text-align: center; }
    .contact__info .section__title { text-align: center; }
    .contact__description { font-size: 0.92rem; margin-bottom: 24px; }
    .contact__details { align-items: center; gap: 12px; }
    .contact__detail { font-size: 0.88rem; }
    .contact__form-wrapper { padding: 28px 20px; }
    .form__group input,
    .form__group select,
    .form__group textarea { padding: 12px 14px; font-size: 0.9rem; }

    .footer { padding: 56px 0 24px; }
    .footer__grid {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 32px;
        margin-bottom: 32px;
    }
    .footer__logo { font-size: 1.4rem; }
    .footer__tagline { font-size: 0.82rem; }
    .footer__links h4 { font-size: 0.78rem; margin-bottom: 14px; }
    .footer__links a { font-size: 0.82rem; }
    .footer__newsletter-form { max-width: 260px; margin: 0 auto; }

    .btn { padding: 11px 22px; font-size: 0.85rem; }
}

@media (max-width: 480px) {
    .section { padding: 48px 0; }
    .section__header { margin-bottom: 32px; }
    .section__title { font-size: 1.4rem; }
    .section__subtitle { font-size: 0.88rem; line-height: 1.65; }

    .hero { min-height: auto; padding: 90px 0 70px; }
    .hero::after { height: 40px; }
    .hero__badge { font-size: 0.62rem; padding: 7px 12px; margin-bottom: 14px; white-space: normal; }
    .hero__title { font-size: 3.5rem; }
    .hero__tagline { font-size: 0.95rem; }
    .hero__subtitle { font-size: 0.85rem; margin-bottom: 28px; }

    .hero__actions {
        flex-direction: column;
        justify-content: center;
        gap: 10px;
        max-width: 260px;
        margin: 0 auto;
    }

    .hero__actions .btn {
        width: 100%;
        padding: 10px 18px;
        font-size: 0.78rem;
    }

    .about__image { aspect-ratio: 4 / 3; }

    .product-card__image { height: 180px; }
    .product-card__content { padding: 16px 16px 20px; }
    .product-card__icon { width: 36px; height: 36px; }

    .sustainability__grid {
        grid-template-columns: 1fr;
        gap: 14px;
    }

    .sustainability__card { padding: 20px 16px; }

    .contact__form-wrapper {
        padding: 22px 16px;
    }

    .footer { padding: 44px 0 20px; }
    .footer__grid { gap: 28px; margin-bottom: 24px; }

    .btn { padding: 10px 20px; font-size: 0.82rem; }

}