/* Basalto Engenharia — landing visual (Nive Sistemas) */

/* ============================================================= Reset */
*,
*::before,
*::after { box-sizing: border-box; }

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

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

body {
    margin: 0;
    font-family: var(--font-body);
    color: var(--ink);
    background: var(--paper);
    line-height: 1.55;
    font-size: 1rem;
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
    overflow-x: hidden;
}

img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; cursor: pointer; background: none; border: 0; padding: 0; }
ul { margin: 0; padding: 0; list-style: none; }
h1, h2, h3, p, figure { margin: 0; }

:focus-visible {
    outline: 2px solid var(--brand);
    outline-offset: 3px;
    border-radius: 4px;
}

.skip-link {
    position: absolute;
    left: -999px;
    top: 0;
    background: var(--brand);
    color: var(--on-brand);
    padding: 0.75rem 1rem;
    border-radius: 0 0 var(--r-sm) 0;
    z-index: 200;
}
.skip-link:focus { left: 0; }

/* ============================================================= Layout */
.sb-container {
    width: 100%;
    max-width: var(--maxw);
    margin-inline: auto;
    padding-inline: 1.25rem;
}

@media (min-width: 768px) {
    .sb-container { padding-inline: 2rem; }
}

.sb-section { padding-block: var(--s-7); }
.sb-section--flush { padding-block: 0; }
#obras,
#servicos,
#construtora,
#contato {
    scroll-margin-top: calc(var(--header-h) + var(--concept-banner-h) + 0.75rem);
}

@media (min-width: 768px) {
    .sb-section { padding-block: var(--s-8); }
}

/* ============================================================= Section head */
.sb-head { max-width: 40rem; margin-bottom: var(--s-5); }
.sb-head--center { margin-inline: auto; text-align: center; }

.sb-kicker {
    display: inline-flex;
    align-items: center;
    gap: 0.55rem;
    font-size: 0.72rem;
    font-weight: 500;
    letter-spacing: 0.22em;
    text-transform: uppercase;
    color: var(--brand);
    margin-bottom: 0.85rem;
}
.sb-kicker::before {
    content: "";
    width: 1.8rem;
    height: 1px;
    background: var(--brand);
}
.sb-head--center .sb-kicker { justify-content: center; }
.sb-head--center .sb-kicker::before { display: none; }

.sb-title {
    font-family: var(--font-display);
    font-weight: 600;
    line-height: 1.08;
    letter-spacing: -0.02em;
    font-size: clamp(2rem, 1.2rem + 3vw, 3.4rem);
    color: #f6f1e4;
}

.sb-lead {
    margin-top: 0.85rem;
    color: var(--ink-70);
    font-size: 1.05rem;
    max-width: 34rem;
}
.sb-head--center .sb-lead { margin-inline: auto; }

/* ============================================================= Buttons */
.sb-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.95rem 1.6rem;
    border-radius: var(--r-full);
    font-weight: 500;
    font-size: 0.92rem;
    letter-spacing: 0.04em;
    border: 1px solid transparent;
    transition: transform var(--t-fast), box-shadow var(--t), background var(--t), color var(--t), border-color var(--t);
    text-align: center;
}
.sb-btn:hover { transform: translateY(-2px); }
.sb-btn:active { transform: translateY(0); }

.sb-btn--brand {
    background: linear-gradient(180deg, var(--gold-hi) 0%, var(--brand) 100%);
    color: var(--on-brand);
    box-shadow: var(--sh-brand);
}
.sb-btn--brand:hover { background: var(--gold-hi); }

.sb-btn--ghost {
    background: transparent;
    border-color: var(--ink-12);
    color: var(--ink);
}
.sb-btn--ghost:hover { border-color: var(--brand); color: var(--brand); }

.sb-btn--lg { padding: 1.05rem 1.9rem; font-size: 0.98rem; }
.sb-btn--block { width: 100%; }

.sb-ico { width: 1.2em; height: 1.2em; flex: none; }

/* ============================================================= Header */
.concept-banner {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 120;
    height: var(--concept-banner-h);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0 0.75rem;
    font-size: 0.62rem;
    font-weight: 500;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    background: #000;
    color: var(--brand);
    line-height: 1;
    border-bottom: 1px solid var(--line);
}

.sb-header {
    position: fixed;
    inset: var(--concept-banner-h) 0 auto 0;
    z-index: 100;
    height: var(--header-h);
    display: flex;
    align-items: center;
    background: rgba(7, 7, 7, 0.82);
    backdrop-filter: saturate(140%) blur(16px);
    -webkit-backdrop-filter: saturate(140%) blur(16px);
    border-bottom: 1px solid rgba(212, 175, 55, 0.28);
    transition: background var(--t), box-shadow var(--t), border-color var(--t);
}
.sb-header.is-scrolled {
    background: rgba(7, 7, 7, 0.94);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.35);
}

.sb-nav {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
}

.sb-brand { display: inline-flex; align-items: center; gap: 0.75rem; }
.sb-brand__logo {
    width: 2.55rem;
    height: 2.55rem;
    flex: none;
}
.sb-brand__text { display: flex; flex-direction: column; line-height: 1.05; }
.sb-brand__name {
    font-family: var(--font-display);
    font-weight: 600;
    font-size: 1.18rem;
    letter-spacing: 0.02em;
    color: #f6f1e4;
}
.sb-brand__tag {
    font-size: 0.62rem;
    font-weight: 500;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--brand);
}

.sb-nav__links { display: none; }
.sb-nav__cta { display: none; }

@media (min-width: 960px) {
    .sb-nav__links {
        display: flex;
        align-items: center;
        gap: 0.15rem;
        margin-left: auto;
        margin-right: 1.25rem;
    }
    .sb-nav__link {
        padding: 0.5rem 0.85rem;
        border-radius: var(--r-full);
        font-size: 0.82rem;
        font-weight: 500;
        letter-spacing: 0.08em;
        text-transform: uppercase;
        color: #f6f1e4;
        white-space: nowrap;
        transition: color var(--t-fast);
    }
    .sb-nav__link:hover { color: var(--gold-hi); }
    .sb-nav__link.is-active { color: var(--gold-hi); }
    .sb-nav__cta { display: inline-flex; }
}

.sb-burger {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 2.6rem;
    height: 2.6rem;
    border-radius: var(--r-sm);
    background: var(--surface);
    border: 1px solid var(--line);
    color: var(--ink);
}
@media (min-width: 960px) { .sb-burger { display: none; } }

/* ============================================================= Drawer */
.sb-drawer {
    position: fixed;
    inset: 0;
    z-index: 150;
    visibility: hidden;
    pointer-events: none;
}
.sb-drawer.is-open { visibility: visible; pointer-events: auto; }

.sb-drawer__backdrop {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.6);
    opacity: 0;
    transition: opacity var(--t);
}
.sb-drawer.is-open .sb-drawer__backdrop { opacity: 1; }

.sb-drawer__panel {
    position: absolute;
    inset: 0 0 0 auto;
    width: min(88vw, 360px);
    background: #0c0c0c;
    padding: 1.25rem 1.25rem 2rem;
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
    transform: translateX(100%);
    transition: transform var(--t);
    overflow-y: auto;
    border-left: 1px solid var(--line);
}
.sb-drawer.is-open .sb-drawer__panel { transform: translateX(0); }

.sb-drawer__top {
    display: flex;
    align-items: center;
    justify-content: space-between;
}
.sb-drawer__title {
    font-family: var(--font-display);
    font-weight: 600;
    font-size: 1.2rem;
    color: var(--brand);
}
.sb-drawer__links { display: flex; flex-direction: column; }
.sb-drawer__link {
    padding: 0.95rem 0.35rem;
    font-size: 1.05rem;
    font-weight: 500;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    border-bottom: 1px solid var(--ink-06);
    transition: color var(--t-fast);
}
.sb-drawer__link:hover { color: var(--brand); }

/* ============================================================= Hero */
.sb-hero {
    position: relative;
    min-height: 100svh;
    display: flex;
    align-items: flex-end;
    padding-top: calc(var(--header-h) + var(--concept-banner-h));
    padding-bottom: 4.5rem;
    overflow: hidden;
}
.sb-hero__bg,
.sb-hero__veil {
    position: absolute;
    inset: 0;
}
.sb-hero__bg { z-index: 0; }
.sb-hero__bg img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transform: scale(1.06);
    filter: brightness(1.06) contrast(1.08) saturate(1.05);
    animation: ja-kenburns 28s var(--ease) alternate infinite;
}
.sb-hero__veil {
    z-index: 1;
    background:
        linear-gradient(95deg, rgba(8,7,5,0.58) 0%, rgba(8,7,5,0.22) 32%, rgba(8,7,5,0.04) 54%, transparent 72%),
        linear-gradient(180deg, rgba(8,7,5,0.18) 0%, transparent 24%, transparent 62%, rgba(8,7,5,0.4) 100%);
}
.sb-hero .sb-container {
    position: relative;
    z-index: 2;
}

@keyframes ja-kenburns {
    from { transform: scale(1.06) translate3d(0, 0, 0); }
    to { transform: scale(1.14) translate3d(-1.5%, -1%, 0); }
}

.sb-hero__copy {
    position: relative;
    max-width: 40rem;
    color: #fff;
}
.sb-hero__copy::before {
    content: "";
    position: absolute;
    z-index: -1;
    inset: -14% -22% -20% -12%;
    background: radial-gradient(ellipse at 22% 46%, rgba(0, 0, 0, 0.46) 0%, rgba(0, 0, 0, 0.16) 46%, transparent 72%);
    pointer-events: none;
}
.sb-hero .sb-btn--ghost {
    border-color: rgba(243, 224, 168, 0.55);
    background: transparent;
    color: var(--gold-hi);
}
.sb-hero .sb-btn--ghost:hover {
    border-color: var(--gold-hi);
    color: var(--gold-hi);
    background: rgba(212, 175, 55, 0.12);
}
.sb-hero .sb-btn--brand {
    box-shadow: 0 14px 30px -12px rgba(212, 175, 55, 0.55);
}
.sb-hero__partners {
    display: inline-flex;
    align-items: center;
    gap: 0.9rem;
    font-size: 0.72rem;
    font-weight: 500;
    letter-spacing: 0.28em;
    text-transform: uppercase;
    color: var(--gold-hi);
    margin-bottom: 1.15rem;
}
.sb-hero__partners::before {
    content: "";
    width: 2.5rem;
    height: 1px;
    background: var(--gold-hi);
}
.sb-hero__title {
    font-family: var(--font-display);
    font-weight: 600;
    line-height: 0.95;
    letter-spacing: -0.03em;
    font-size: clamp(3.1rem, 2rem + 7vw, 7.2rem);
    color: #fff;
    text-shadow: 0 10px 36px rgba(0, 0, 0, 0.45);
}
.sb-hero__title em {
    font-style: italic;
    font-weight: 500;
    color: var(--gold-hi);
}
.sb-hero__slogan {
    margin-top: 1.4rem;
    font-family: var(--font-display);
    font-style: italic;
    font-size: clamp(1.2rem, 1rem + 1.2vw, 1.7rem);
    color: rgba(255, 255, 255, 0.92);
    max-width: 26ch;
    text-shadow: 0 8px 28px rgba(0, 0, 0, 0.5);
}
.sb-hero__actions {
    margin-top: 2.2rem;
    display: flex;
    flex-wrap: wrap;
    gap: 0.85rem;
}
@media (max-width: 480px) {
    .sb-hero__actions .sb-btn { width: 100%; }
    .sb-hero { padding-bottom: 3.2rem; }
}

/* ============================================================= Pillars marquee */
.sb-pillars {
    border-block: 1px solid var(--line);
    background: #0b0b0b;
    overflow: hidden;
}
.sb-pillars__track {
    display: flex;
    gap: 0;
    width: max-content;
    animation: ja-marquee 28s linear infinite;
}
.sb-pillars__item {
    display: flex;
    align-items: center;
    gap: 0.7rem;
    padding: 1.05rem 2.4rem;
    font-size: 0.78rem;
    font-weight: 500;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--brand);
    white-space: nowrap;
}
.sb-pillars__item svg {
    width: 1.05rem;
    height: 1.05rem;
    opacity: 0.9;
}
.sb-pillars__dot {
    width: 4px;
    height: 4px;
    border-radius: 50%;
    background: var(--brand);
    opacity: 0.55;
}

@keyframes ja-marquee {
    from { transform: translateX(0); }
    to { transform: translateX(-50%); }
}

/* ============================================================= Gallery */
.sb-gallery {
    display: grid;
    gap: 0.7rem;
    grid-template-columns: 1fr;
}
@media (min-width: 720px) {
    .sb-gallery {
        grid-template-columns: repeat(12, 1fr);
        grid-auto-rows: 168px;
    }
    .sb-shot--hero { grid-column: span 8; grid-row: span 3; }
    .sb-shot--tall { grid-column: span 4; grid-row: span 3; }
    .sb-shot--wide { grid-column: span 8; grid-row: span 2; }
    .sb-shot--normal { grid-column: span 4; grid-row: span 2; }
    .sb-shot--full { grid-column: span 12; grid-row: span 2; }
}
@media (min-width: 1100px) {
    .sb-gallery { grid-auto-rows: 190px; }
}

.sb-shot {
    position: relative;
    margin: 0;
    border-radius: 4px;
    overflow: hidden;
    isolation: isolate;
    min-height: 240px;
    cursor: zoom-in;
    border: 1px solid transparent;
    transition: border-color var(--t);
}
@media (min-width: 720px) { .sb-shot { min-height: 0; } }
.sb-shot:hover { border-color: var(--brand-24); }
.sb-shot img {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.8s var(--ease);
}
.sb-shot:hover img { transform: scale(1.06); }
.sb-shot::after {
    content: "";
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, transparent 45%, rgba(0,0,0,0.72) 100%);
    z-index: 1;
}
.sb-shot figcaption {
    position: absolute;
    z-index: 2;
    left: 1rem;
    bottom: 1rem;
    right: 1rem;
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    gap: 0.75rem;
}
.sb-shot figcaption strong {
    font-family: var(--font-display);
    font-weight: 600;
    font-size: 1.35rem;
    letter-spacing: 0.01em;
}
.sb-shot figcaption span {
    font-size: 0.68rem;
    letter-spacing: 0.16em;
    text-transform: uppercase;
    color: var(--brand);
}

/* ============================================================= Serviços */
.sb-services {
    display: grid;
    gap: 0.7rem;
    grid-template-columns: 1fr;
}
@media (min-width: 800px) {
    .sb-services { grid-template-columns: repeat(3, 1fr); }
}

.sb-service {
    position: relative;
    display: block;
    min-height: 420px;
    border-radius: 4px;
    overflow: hidden;
    isolation: isolate;
    color: #fff;
}
.sb-service img {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    z-index: -2;
    transition: transform 0.8s var(--ease);
}
.sb-service:hover img { transform: scale(1.07); }
.sb-service::before {
    content: "";
    position: absolute;
    inset: 0;
    z-index: -1;
    background: linear-gradient(180deg, rgba(0,0,0,0.1) 0%, rgba(0,0,0,0.78) 100%);
}
.sb-service__body {
    position: absolute;
    inset: auto 0 0 0;
    padding: 1.6rem 1.4rem 1.5rem;
}
.sb-service h3 {
    font-family: var(--font-display);
    font-weight: 600;
    font-size: 2.15rem;
    line-height: 1;
}
.sb-service p {
    margin-top: 0.45rem;
    color: rgba(255,255,255,0.75);
    font-size: 0.95rem;
}
.sb-service__go {
    display: inline-block;
    margin-top: 1rem;
    font-size: 0.72rem;
    letter-spacing: 0.16em;
    text-transform: uppercase;
    color: var(--brand);
}

/* ============================================================= Sobre */
.sb-about {
    display: grid;
    gap: var(--s-6);
    align-items: stretch;
}
@media (min-width: 900px) {
    .sb-about { grid-template-columns: 1.15fr 0.85fr; gap: var(--s-7); }
}

.sb-about__figure {
    margin: 0;
    border-radius: 4px;
    overflow: hidden;
    min-height: 420px;
    position: relative;
}
.sb-about__figure img {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.sb-about__copy {
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding-block: 1.5rem;
    color: var(--ink);
    border-top: 1px solid var(--line);
    border-bottom: 1px solid var(--line);
}
.sb-about__copy .sb-title { max-width: 12ch; }
.sb-about__slogan {
    margin-top: 1.25rem;
    font-family: var(--font-display);
    font-style: italic;
    font-size: 1.45rem;
    color: var(--gold-hi);
    max-width: 16ch;
}
.sb-about__tags {
    margin-top: 2rem;
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}
.sb-about__tags span {
    padding: 0.4rem 0.85rem;
    border: 1px solid var(--line);
    border-radius: var(--r-full);
    font-size: 0.72rem;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--brand);
}

/* ============================================================= Evento */
.sb-event {
    background: #050505;
    padding-block: var(--s-7);
}
@media (min-width: 768px) {
    .sb-event { padding-block: var(--s-8); }
}
.sb-event__frame {
    margin: 0 auto;
    max-width: 920px;
    border: 1px solid var(--line);
    padding: 0.7rem;
    background: #0b0b0b;
    box-shadow: var(--sh-md);
}
.sb-event__frame img {
    width: 100%;
    height: auto;
    display: block;
}
.sb-event__caption {
    text-align: center;
    margin-top: 1.6rem;
    font-family: var(--font-display);
    font-style: italic;
    font-size: clamp(1.15rem, 1rem + 1vw, 1.55rem);
    color: var(--gold-hi);
}

/* ============================================================= CTA */
.sb-cta { padding-block: var(--s-8); }
.sb-cta__inner {
    position: relative;
    overflow: hidden;
    border-radius: 4px;
    border: 1px solid var(--line);
    background:
        radial-gradient(80% 80% at 90% 10%, rgba(212,175,55,0.18) 0%, transparent 55%),
        #0d0d0d;
    padding: clamp(2.4rem, 1.4rem + 6vw, 5.2rem);
    text-align: center;
}
.sb-cta h2 {
    font-family: var(--font-display);
    font-weight: 600;
    line-height: 1.05;
    letter-spacing: -0.02em;
    font-size: clamp(2.1rem, 1.3rem + 3.4vw, 3.6rem);
    max-width: 16ch;
    margin-inline: auto;
}
.sb-cta p {
    margin-top: 1rem;
    color: var(--ink-70);
    font-family: var(--font-display);
    font-style: italic;
    font-size: 1.25rem;
}
.sb-cta__actions {
    margin-top: 2rem;
    display: flex;
    flex-wrap: wrap;
    gap: 0.85rem;
    justify-content: center;
}

/* ============================================================= Footer */
.sb-footer {
    background: #000;
    color: var(--ink);
    padding-block: var(--s-6) var(--s-5);
    border-top: 1px solid var(--line);
}
.sb-footer__grid {
    display: grid;
    gap: var(--s-5);
    grid-template-columns: 1fr;
    align-items: start;
}
@media (min-width: 800px) {
    .sb-footer__grid { grid-template-columns: 1.6fr 1fr 1fr; }
}

.sb-footer__brand { display: inline-flex; align-items: center; gap: 0.75rem; margin-bottom: 1rem; }
.sb-footer__brand img { width: 2.4rem; height: 2.4rem; }
.sb-footer__brand span {
    font-family: var(--font-display);
    font-weight: 600;
    font-size: 1.2rem;
}
.sb-footer__text {
    color: var(--ink-52);
    font-family: var(--font-display);
    font-style: italic;
    font-size: 1.1rem;
    max-width: 22ch;
}

.sb-footer__col h3 {
    font-size: 0.7rem;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: var(--brand);
    margin-bottom: 1rem;
    font-weight: 500;
}
.sb-footer__col a,
.sb-footer__col p {
    display: block;
    color: var(--ink-70);
    font-size: 0.95rem;
    padding-block: 0.3rem;
    transition: color var(--t-fast);
}
.sb-footer__col a:hover { color: var(--brand); }

.sb-footer__bottom {
    margin-top: var(--s-6);
    padding-top: 1.4rem;
    border-top: 1px solid var(--ink-06);
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem 1rem;
    justify-content: space-between;
    color: var(--ink-52);
    font-size: 0.8rem;
}
.sb-footer__bottom a { color: var(--ink-70); }
.sb-footer__bottom a:hover { color: var(--brand); }

/* ============================================================= WhatsApp float */
.sb-wa {
    position: fixed;
    right: 1.1rem;
    bottom: 1.1rem;
    z-index: 90;
    width: 3.5rem;
    height: 3.5rem;
    border-radius: 50%;
    display: grid;
    place-items: center;
    background: linear-gradient(180deg, var(--gold-hi) 0%, var(--brand) 100%);
    color: var(--on-brand);
    box-shadow: var(--sh-brand);
    transition: transform var(--t);
}
.sb-wa:hover { transform: scale(1.06); }
.sb-wa svg { width: 1.85rem; height: 1.85rem; }
@media (min-width: 768px) { .sb-wa { right: 1.75rem; bottom: 1.75rem; } }

/* ============================================================= Lightbox */
.sb-lightbox {
    position: fixed;
    inset: 0;
    z-index: 250;
    background: rgba(0,0,0,0.92);
    display: grid;
    place-items: center;
    padding: 1.5rem;
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--t), visibility var(--t);
}
.sb-lightbox.is-open { opacity: 1; visibility: visible; }
.sb-lightbox img {
    max-width: min(1100px, 100%);
    max-height: 88vh;
    object-fit: contain;
    box-shadow: var(--sh-md);
}
.sb-lightbox__close {
    position: absolute;
    top: 1rem;
    right: 1rem;
    width: 2.6rem;
    height: 2.6rem;
    border-radius: 50%;
    border: 1px solid var(--line);
    color: var(--ink);
    font-size: 1.4rem;
    line-height: 1;
}

/* ============================================================= Reveal */
.js [data-reveal] {
    opacity: 0;
    transform: translateY(22px);
    transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
    transition-delay: var(--reveal-delay, 0s);
}
.js [data-reveal].is-in { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
    .js [data-reveal] { opacity: 1; transform: none; transition: none; }
    .sb-btn:hover, .sb-wa:hover, .sb-shot:hover img, .sb-service:hover img { transform: none; }
    .sb-hero__bg img, .sb-pillars__track { animation: none; }
}