:root {
    --arc-red: #D71920;
    --arc-red-deep: #9E1016;
    --arc-ink: #0E0E0E;
    --arc-paper: #F4F1EC;
    --arc-steel: #8B8680;
    --arc-line: rgba(255, 255, 255, 0.12);
    --whatsapp-green: #25D366;
    --font-display: "Manrope", sans-serif;
    --font-body: "Manrope", sans-serif;
    --ease: cubic-bezier(0.22, 1, 0.36, 1);
    --nav-h: 76px;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    color: var(--arc-ink);
    background: var(--arc-paper);
    -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4, h5, .font-display {
    font-family: var(--font-display);
    font-weight: 700;
    letter-spacing: -0.015em;
}

.text-arc-red { color: var(--arc-red) !important; }
.bg-arc-red { background-color: var(--arc-red) !important; }
.hover-red:hover { color: var(--arc-red) !important; }

/* ——— Buttons ——— */
.btn-arc {
    position: relative;
    isolation: isolate;
    overflow: hidden;
    background: var(--arc-red);
    color: #fff;
    border: none;
    border-radius: 0;
    font-family: var(--font-display);
    font-weight: 700;
    letter-spacing: 0.02em;
    text-transform: uppercase;
    font-size: 0.82rem;
    padding: 0.95rem 1.8rem;
    transition: color 0.25s var(--ease);
}

.btn-arc::before {
    content: "";
    position: absolute;
    inset: 0;
    background: var(--arc-red-deep);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.28s var(--ease);
    z-index: -1;
}

.btn-arc:hover {
    color: #fff;
}

.btn-arc:hover::before {
    transform: scaleX(1);
}

.btn-arc-outline {
    background: transparent;
    color: #fff;
    border: 1px solid rgba(255, 255, 255, 0.35);
}

.btn-arc-outline::before {
    background: #fff;
}

.btn-arc-outline:hover {
    color: var(--arc-ink);
    border-color: #fff;
}

.btn-ghost {
    color: var(--arc-ink);
    text-decoration: none;
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 0.78rem;
    letter-spacing: 0.04em;
    text-transform: uppercase;
}

.btn-ghost:hover { color: var(--arc-red); }

.btn-ig {
    background: linear-gradient(45deg, #f09433 0%, #e6683c 25%, #dc2743 50%, #cc2366 75%, #bc1888 100%);
    color: #fff;
    border: none;
    border-radius: 0;
}

.btn-ig:hover { color: #fff; filter: brightness(1.05); }

/* ——— Navbar ——— */
.arc-nav {
    background: transparent;
    padding: 0.7rem 0;
    transition: background 0.25s var(--ease), box-shadow 0.25s var(--ease), padding 0.25s var(--ease);
    z-index: 1040;
}

.arc-nav.is-solid,
.arc-nav.is-open,
body:not(.has-hero) .arc-nav {
    background: rgba(14, 14, 14, 0.94);
    backdrop-filter: blur(16px);
    box-shadow: 0 1px 0 var(--arc-line);
}

.arc-nav .navbar-brand {
    gap: 0.75rem;
}

.arc-nav img.logo-arc {
    height: 48px;
    width: auto;
    border: 1px solid rgba(255, 255, 255, 0.15);
}

.arc-nav img.logo-ally {
    height: 36px;
    width: auto;
    opacity: 0.9;
}

.brand-name {
    font-family: var(--font-display);
    font-weight: 700;
    color: #fff;
    font-size: 1.25rem;
    letter-spacing: 0.04em;
    line-height: 1;
}

.brand-sub {
    font-size: 0.68rem;
    color: rgba(255, 255, 255, 0.65);
    letter-spacing: 0.03em;
    text-transform: uppercase;
}

.arc-nav .nav-link {
    color: #fff !important;
    font-family: var(--font-display);
    font-weight: 600;
    font-size: 0.8rem;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    padding: 0.5rem 0.85rem !important;
    position: relative;
}

.arc-nav .nav-link::after {
    content: "";
    position: absolute;
    left: 0.85rem;
    right: 0.85rem;
    bottom: 0.2rem;
    height: 2px;
    background: var(--arc-red);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.22s var(--ease);
}

.arc-nav .nav-link:hover::after,
.arc-nav .nav-link:focus::after {
    transform: scaleX(1);
}

.arc-nav .nav-cta {
    border: 1px solid rgba(255, 255, 255, 0.4);
    margin-left: 0.6rem;
    padding: 0.45rem 1.1rem !important;
}

.arc-nav .nav-cta::after { display: none; }

.arc-nav .nav-cta:hover {
    background: #fff;
    color: var(--arc-ink) !important;
}

.arc-nav .navbar-toggler {
    border: 1px solid rgba(255, 255, 255, 0.35);
    border-radius: 0;
}

@media (min-width: 992px) {
    .arc-nav img.logo-arc { height: 56px; }
}

/* ——— Reveal ——— */
[data-reveal] {
    opacity: 0;
    transform: translateY(16px);
    transition: opacity 0.35s var(--ease), transform 0.35s var(--ease);
}

[data-reveal].is-in {
    opacity: 1;
    transform: none;
}

[data-reveal="1"] { transition-delay: 0.06s; }
[data-reveal="2"] { transition-delay: 0.12s; }
[data-reveal="3"] { transition-delay: 0.18s; }

/* ——— Eyebrow / titles ——— */
.eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    font-family: var(--font-display);
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--arc-red);
    margin-bottom: 1rem;
}

.eyebrow::before {
    content: "";
    width: 28px;
    height: 2px;
    background: var(--arc-red);
}

.section {
    padding: 6.5rem 0;
}

.section-title {
    font-size: clamp(2rem, 4vw, 3.2rem);
    font-weight: 700;
    line-height: 1.05;
    margin-bottom: 0.75rem;
}

.section-lead {
    color: var(--arc-steel);
    max-width: 36rem;
}

/* ——— Hero ——— */
.hero {
    position: relative;
    height: 100vh;
    min-height: 560px;
    overflow: hidden;
    background: var(--arc-ink);
}

.hero-carousel,
.hero-carousel .carousel-inner,
.hero-carousel .carousel-item {
    height: 100%;
}

.hero-carousel .carousel-item img,
.hero-carousel .img-fallback {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.hero-carousel .carousel-item img {
    transform: scale(1);
    animation: kenburns 8s ease-out forwards;
}

@keyframes kenburns {
    to { transform: scale(1.08); }
}

.hero-shade {
    position: absolute;
    inset: 0;
    z-index: 2;
    background:
        linear-gradient(90deg, rgba(14, 14, 14, 0.78) 0%, rgba(14, 14, 14, 0.35) 55%, rgba(14, 14, 14, 0.2) 100%),
        linear-gradient(180deg, rgba(14, 14, 14, 0.25) 0%, rgba(14, 14, 14, 0.15) 40%, rgba(14, 14, 14, 0.75) 100%);
    pointer-events: none;
}

.hero-copy {
    position: absolute;
    inset: 0;
    z-index: 3;
    display: flex;
    align-items: flex-end;
    padding-bottom: 8vh;
    pointer-events: none;
}

.hero-copy .container { pointer-events: auto; }

.hero-title {
    color: #fff;
    font-size: clamp(2.4rem, 5.5vw, 4.4rem);
    font-weight: 700;
    line-height: 1.08;
    max-width: 16ch;
}

.underline-arc {
    color: inherit;
    position: relative;
    display: inline-block;
    text-decoration: none !important;
}

.underline-arc::after {
    content: "";
    display: block;
    width: 100%;
    height: 6px;
    background: var(--arc-red);
    margin-top: 0.2em;
}

.hero-lead {
    color: rgba(255, 255, 255, 0.78);
    font-size: 1.1rem;
    max-width: 34rem;
    margin: 1.4rem 0 2rem;
}

.hero-carousel .carousel-control-prev,
.hero-carousel .carousel-control-next {
    width: 56px;
    height: 56px;
    top: auto;
    bottom: 8vh;
    opacity: 0.85;
    z-index: 4;
}

.hero-carousel .carousel-control-prev { right: 88px; left: auto; }
.hero-carousel .carousel-control-next { right: 24px; }

.scroll-hint {
    position: absolute;
    left: 50%;
    bottom: 1.6rem;
    z-index: 4;
    transform: translateX(-50%);
    color: rgba(255, 255, 255, 0.6);
    font-size: 0.68rem;
    letter-spacing: 0.03em;
    text-transform: uppercase;
    text-decoration: none;
}

.scroll-hint span {
    display: block;
    width: 1px;
    height: 36px;
    margin: 0.4rem auto 0;
    background: var(--arc-red);
    animation: drop 1.4s var(--ease) infinite;
}

@keyframes drop {
    0% { transform: scaleY(0); transform-origin: top; opacity: 0; }
    40% { transform: scaleY(1); transform-origin: top; opacity: 1; }
    100% { transform: scaleY(0); transform-origin: bottom; opacity: 0; }
}

/* ——— Service cards ——— */
.card-media {
    position: relative;
    display: block;
    height: 340px;
    overflow: hidden;
    background: var(--arc-ink);
    color: #fff;
    text-decoration: none;
}

.card-media img,
.card-media .img-fallback {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.55s var(--ease);
}

.card-media:hover img {
    transform: scale(1.08);
}

.card-media-shade {
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, rgba(14, 14, 14, 0.05) 25%, rgba(14, 14, 14, 0.88) 100%);
}

.card-media-body {
    position: absolute;
    left: 0;
    right: 0;
    bottom: 0;
    padding: 1.5rem;
}

.card-media-body .icon-badge {
    width: 40px;
    height: 40px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: #fff;
    color: var(--arc-red);
    margin-bottom: 0.85rem;
}

.card-media h3 {
    color: #fff;
    font-size: 1.45rem;
    font-weight: 700;
    margin-bottom: 0.35rem;
}

.card-media p {
    color: rgba(255, 255, 255, 0.72);
    font-size: 0.92rem;
    margin: 0;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.card-media-bar {
    position: absolute;
    left: 0;
    bottom: 0;
    height: 3px;
    width: 0;
    background: var(--arc-red);
    transition: width 0.3s var(--ease);
}

.card-media:hover .card-media-bar,
.card-media:focus .card-media-bar {
    width: 100%;
}

/* ——— Process ——— */
.process {
    background: var(--arc-ink);
    color: #fff;
}

.process-item {
    padding: 1.5rem 0;
    border-top: 1px solid var(--arc-line);
}

.process-num {
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 0.8rem;
    letter-spacing: 0.06em;
    color: var(--arc-red);
}

.process-item h3 {
    font-size: 1.7rem;
    font-weight: 700;
    margin: 0.6rem 0 0.7rem;
}

.process-item p {
    color: rgba(255, 255, 255, 0.62);
    margin: 0;
}

/* ——— Project cards ——— */
.card-case {
    position: relative;
    display: block;
    height: 460px;
    overflow: hidden;
    background: var(--arc-ink);
    text-decoration: none;
    color: #fff;
}

.card-case img,
.card-case .img-fallback {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.6s var(--ease);
}

.card-case:hover img {
    transform: scale(1.07);
}

.card-case-shade {
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, transparent 35%, rgba(14, 14, 14, 0.9) 100%);
}

.card-case-body {
    position: absolute;
    left: 0;
    right: 0;
    bottom: 0;
    padding: 1.6rem;
}

.card-case-meta {
    font-size: 0.75rem;
    letter-spacing: 0.03em;
    text-transform: uppercase;
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: 0.4rem;
}

.card-case h3 {
    font-size: 1.5rem;
    font-weight: 700;
    color: #fff;
    margin: 0;
}

.card-case-cta {
    display: inline-block;
    margin-top: 0.85rem;
    font-family: var(--font-display);
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    color: #fff;
    opacity: 0;
    transform: translateY(8px);
    transition: opacity 0.28s var(--ease), transform 0.28s var(--ease);
}

.card-case:hover .card-case-cta {
    opacity: 1;
    transform: none;
}

.card-case-cta i { color: var(--arc-red); }

/* ——— Contact ——— */
.contact {
    background: var(--arc-ink);
    color: #fff;
}

.field-line {
    background: transparent;
    border: none;
    border-bottom: 1px solid rgba(255, 255, 255, 0.22);
    border-radius: 0;
    color: #fff;
    padding: 0.95rem 0;
    box-shadow: none !important;
}

.field-line::placeholder { color: rgba(255, 255, 255, 0.4); }

.field-line:focus {
    background: transparent;
    color: #fff;
    border-bottom-color: var(--arc-red);
}

.coverage-panel {
    background: #161616;
    padding: 3rem 2.4rem;
    min-height: 100%;
    display: flex;
    flex-direction: column;
    justify-content: center;
    border-left: 3px solid var(--arc-red);
}

.coverage-stat {
    font-family: var(--font-display);
    font-weight: 700;
    font-size: clamp(3.2rem, 7vw, 5rem);
    line-height: 0.9;
    color: #fff;
}

/* ——— Case / detail ——— */
.case-hero {
    position: relative;
    min-height: 62vh;
    display: flex;
    align-items: flex-end;
    background: var(--arc-ink);
    color: #fff;
    overflow: hidden;
}

.case-hero img,
.case-hero .img-fallback {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.case-hero-shade {
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, rgba(14, 14, 14, 0.25) 0%, rgba(14, 14, 14, 0.82) 100%);
}

.case-hero-copy {
    position: relative;
    z-index: 2;
    padding: calc(var(--nav-h) + 3rem) 0 3.2rem;
}

.tech-plate {
    background: #fff;
    border-top: 3px solid var(--arc-red);
    padding: 1.8rem 1.6rem;
}

.tech-plate dt {
    font-size: 0.68rem;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--arc-steel);
    font-weight: 700;
}

.tech-plate dd {
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 1.05rem;
    margin: 0.2rem 0 1rem;
}

.tech-plate dd:last-child { margin-bottom: 0; }

.reel-block { margin-top: 2.5rem; }

.reel-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 1.5rem;
}

.reel-card {
    width: min(100%, 400px);
    margin: 0;
}

.reel-card iframe {
    display: block;
    width: 100%;
    height: 720px;
    border: 0;
    background: var(--arc-ink);
}

.reel-card figcaption {
    margin-top: 0.6rem;
    font-size: 0.9rem;
    color: var(--arc-steel);
}

.gallery-frame {
    overflow: hidden;
    background: var(--arc-ink);
}

.gallery-frame .carousel-item img,
.gallery-frame .img-fallback {
    width: 100%;
    height: 520px;
    object-fit: cover;
}

.cta-band {
    background: var(--arc-ink);
    color: #fff;
    padding: 3.5rem 2.5rem;
}

/* ——— Footer / float ——— */
.arc-footer {
    background: var(--arc-ink);
    color: #fff;
    padding: 4.5rem 0 2rem;
    border-top: 1px solid var(--arc-line);
}

.arc-footer h5 {
    font-size: 0.78rem;
    letter-spacing: 0.06em;
}

.footer-rule {
    height: 3px;
    width: 36px;
    background: var(--arc-red);
}

.arc-footer a { color: #fff; }
.arc-footer .muted,
.arc-footer .text-secondary {
    color: var(--arc-steel) !important;
}

.btn-whatsapp-float {
    position: fixed;
    right: 22px;
    bottom: 22px;
    width: 52px;
    height: 52px;
    border-radius: 50%;
    background: var(--whatsapp-green);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    z-index: 1050;
    text-decoration: none;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.25);
    animation: pulse 2.4s var(--ease) infinite;
}

.btn-whatsapp-float:hover {
    color: #fff;
    transform: scale(1.06);
    animation: none;
}

@keyframes pulse {
    0%, 100% { box-shadow: 0 0 0 0 rgba(37, 211, 102, 0.45); }
    70% { box-shadow: 0 0 0 14px rgba(37, 211, 102, 0); }
}

.img-fallback {
    background: #1a1a1a;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
}

@media (max-width: 767.98px) {
    .section { padding: 4.2rem 0; }
    .card-case { height: 380px; }
    .card-media { height: 300px; }
    .gallery-frame .carousel-item img,
    .gallery-frame .img-fallback { height: 320px; }
    .hero-carousel .carousel-control-prev,
    .hero-carousel .carousel-control-next { display: none; }
    .card-case-cta { opacity: 1; transform: none; }
}

@media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
    *, *::before, *::after {
        animation: none !important;
        transition: none !important;
    }
    [data-reveal] {
        opacity: 1;
        transform: none;
    }
}