/* Aços JSider — Aço & Siderurgia
   Identidade: industrial técnico. Grafite #23272B, aço #4A545E,
   laranja de segurança #F25C05, âmbar #FFB703, cinza claro #F2F3F5.
   Fontes: Saira Condensed (display) · Mukta (texto) · Quantico (números) */

:root {
    --ink: #23272B;
    --steel: #4A545E;
    --steel-2: #333B42;
    --safety: #F25C05;
    --amber: #FFB703;
    --mist: #F2F3F5;
    --white: #FFFFFF;
    --line: #D5DAE0;
    --display: 'Saira Condensed', sans-serif;
    --body: 'Mukta', sans-serif;
    --mono: 'Quantico', monospace;
}

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

html { scroll-behavior: smooth; }

body {
    font-family: var(--body);
    background: var(--mist);
    color: var(--ink);
    line-height: 1.65;
    overflow-x: hidden;
}

h1, h2, h3 {
    font-family: var(--display);
    text-transform: uppercase;
    letter-spacing: 0.02em;
    line-height: 1.15;
    font-weight: 700;
}

h2 { font-size: 2.1rem; margin-bottom: 1rem; }
h3 { font-size: 1.25rem; }

img { max-width: 100%; display: block; }

.container { width: min(1160px, 92%); margin: 0 auto; }

.section-tag {
    font-family: var(--mono);
    font-size: 0.8rem;
    letter-spacing: 0.22em;
    text-transform: uppercase;
    color: var(--safety);
    margin-bottom: 0.5rem;
}

.section-intro { max-width: 640px; color: var(--steel); margin-bottom: 2rem; }

/* ============ HEADER ============ */
.main-header {
    position: fixed;
    inset: 0 0 auto 0;
    background: rgba(35, 39, 43, 0.96);
    border-bottom: 3px solid var(--safety);
    z-index: 1000;
    transition: box-shadow 0.3s ease;
}
.main-header.is-scrolled { box-shadow: 0 6px 24px rgba(0, 0, 0, 0.35); }

.navbar {
    max-width: 1240px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    gap: 1.5rem;
    padding: 0.85rem 1.5rem;
}

.brand { display: flex; align-items: center; gap: 0.7rem; text-decoration: none; }

.brand-mark {
    width: 38px; height: 38px;
    background:
        linear-gradient(135deg, var(--steel) 0 50%, var(--ink) 50% 100%);
    border-left: 5px solid var(--safety);
    position: relative;
}
.brand-mark::after {
    content: '';
    position: absolute;
    right: -6px; top: 50%;
    width: 12px; height: 12px;
    background: var(--amber);
    transform: translateY(-50%) rotate(45deg);
}

.brand-text { color: var(--white); font-family: var(--display); line-height: 1.05; }
.brand-text strong { font-size: 1.3rem; letter-spacing: 0.06em; font-weight: 700; }
.brand-text em { color: var(--amber); font-style: normal; }
.brand-text small {
    display: block;
    font-family: var(--mono);
    font-size: 0.62rem;
    letter-spacing: 0.3em;
    text-transform: uppercase;
    color: #9AA6B2;
}

.nav-menu {
    display: flex;
    gap: 1.4rem;
    list-style: none;
    margin-left: auto;
}
.nav-menu a {
    color: #E8ECEF;
    text-decoration: none;
    font-weight: 600;
    font-size: 0.95rem;
    padding: 0.35rem 0.2rem;
    border-bottom: 2px solid transparent;
    transition: color 0.2s, border-color 0.2s;
}
.nav-menu a:hover { color: var(--amber); border-color: var(--safety); }

.header-cta {
    font-family: var(--display);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    font-weight: 700;
    font-size: 0.9rem;
    color: var(--ink);
    background: var(--safety);
    text-decoration: none;
    padding: 0.55rem 1.1rem;
    clip-path: polygon(8px 0, 100% 0, calc(100% - 8px) 100%, 0 100%);
    transition: background 0.2s;
}
.header-cta:hover { background: var(--amber); }

.menu-toggle {
    display: none;
    background: none;
    border: 2px solid var(--steel);
    cursor: pointer;
    width: 44px; height: 40px;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 5px;
}
.menu-toggle span {
    display: block;
    width: 20px; height: 2px;
    background: var(--white);
    transition: transform 0.25s, opacity 0.25s;
}
.menu-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.menu-toggle.open span:nth-child(2) { opacity: 0; }
.menu-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ============ HERO ============ */
.hero {
    display: grid;
    grid-template-columns: 1.05fr 0.95fr;
    min-height: 92vh;
    padding-top: 72px;
}

.hero-panel {
    background:
        repeating-linear-gradient(-45deg, transparent 0 22px, rgba(255, 255, 255, 0.03) 22px 24px),
        linear-gradient(160deg, var(--ink) 0%, var(--steel-2) 100%);
    color: var(--white);
    padding: 4.5rem 4rem 3.5rem;
    display: flex;
    flex-direction: column;
    justify-content: center;
    clip-path: polygon(0 0, 100% 0, calc(100% - 56px) 100%, 0 100%);
}

.hero-kicker {
    font-family: var(--mono);
    font-size: 0.8rem;
    letter-spacing: 0.25em;
    text-transform: uppercase;
    color: var(--amber);
    margin-bottom: 1.1rem;
}

.hero-title {
    font-size: 2.9rem;
    color: var(--white);
    margin-bottom: 1.2rem;
    border-left: 6px solid var(--safety);
    padding-left: 1.1rem;
}

.hero-sub { color: #C9D2DB; max-width: 520px; margin-bottom: 1.8rem; }

.hero-actions { display: flex; gap: 0.9rem; flex-wrap: wrap; margin-bottom: 2.4rem; }

.btn {
    display: inline-block;
    font-family: var(--display);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    text-decoration: none;
    padding: 0.8rem 1.6rem;
    font-size: 0.95rem;
    transition: transform 0.15s, background 0.2s, color 0.2s;
}
.btn:active { transform: translateY(2px); }
.btn-primary {
    background: var(--safety);
    color: var(--white);
    clip-path: polygon(10px 0, 100% 0, calc(100% - 10px) 100%, 0 100%);
}
.btn-primary:hover { background: #FF7A2E; }
.btn-ghost {
    color: var(--white);
    border: 2px solid var(--steel);
}
.btn-ghost:hover { border-color: var(--amber); color: var(--amber); }

.hero-metrics {
    display: flex;
    gap: 2.2rem;
    list-style: none;
    border-top: 1px solid rgba(255, 255, 255, 0.15);
    padding-top: 1.4rem;
}
.hero-metrics strong {
    font-family: var(--mono);
    font-size: 1.6rem;
    color: var(--amber);
    display: block;
}
.hero-metrics span { color: #9AA6B2; font-size: 0.85rem; }

.hero-visual { position: relative; overflow: hidden; }
.hero-visual img { width: 100%; height: 100%; object-fit: cover; }

.hero-badge {
    position: absolute;
    left: 1.6rem; bottom: 1.6rem;
    background: rgba(35, 39, 43, 0.9);
    color: var(--white);
    font-family: var(--mono);
    font-size: 0.75rem;
    letter-spacing: 0.08em;
    padding: 0.6rem 1rem;
    border-left: 4px solid var(--amber);
    display: flex;
    align-items: center;
    gap: 0.6rem;
}
.hero-badge .dot {
    width: 9px; height: 9px;
    border-radius: 50%;
    background: #3DDC7F;
    animation: pulse 1.8s infinite;
}
@keyframes pulse {
    0%, 100% { box-shadow: 0 0 0 0 rgba(61, 220, 127, 0.6); }
    50% { box-shadow: 0 0 0 7px rgba(61, 220, 127, 0); }
}

/* ============ SOBRE ============ */
.about { background: var(--white); padding: 5rem 0; }
.about-grid {
    display: grid;
    grid-template-columns: 0.9fr 1.1fr;
    gap: 3rem;
    align-items: center;
}
.about-media img { border-left: 8px solid var(--safety); }
.about-media figcaption {
    font-family: var(--mono);
    font-size: 0.75rem;
    color: var(--steel);
    margin-top: 0.6rem;
    letter-spacing: 0.06em;
}
.about-text p + p { margin-top: 1rem; }
.about-text strong { color: var(--safety); }

/* ============ LINHAS ============ */
.lines { padding: 5rem 0; }
.lines-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.6rem;
}
.line-card {
    background: var(--white);
    border: 1px solid var(--line);
    border-top: 5px solid var(--steel);
    transition: transform 0.2s, border-color 0.2s, box-shadow 0.2s;
}
.line-card:hover {
    transform: translateY(-6px);
    border-top-color: var(--safety);
    box-shadow: 0 14px 30px rgba(35, 39, 43, 0.12);
}
.line-card img { width: 100%; height: 200px; object-fit: cover; }
.line-body { padding: 1.4rem 1.5rem 1.6rem; }
.line-body p { color: var(--steel); margin-bottom: 0.8rem; }
.line-body ul { list-style: none; }
.line-body li {
    padding-left: 1.2rem;
    position: relative;
    font-size: 0.92rem;
    color: var(--ink);
    margin-bottom: 0.3rem;
}
.line-body li::before {
    content: '';
    position: absolute;
    left: 0; top: 0.55em;
    width: 8px; height: 3px;
    background: var(--amber);
}
.line-card-wide {
    grid-column: 1 / -1;
    display: block;
    border-top-color: var(--amber);
    background:
        repeating-linear-gradient(-45deg, transparent 0 26px, rgba(242, 92, 5, 0.04) 26px 28px),
        var(--white);
}
.line-link {
    display: inline-block;
    margin-top: 1rem;
    color: var(--safety);
    font-weight: 700;
    text-decoration: none;
    font-family: var(--display);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}
.line-link:hover { color: var(--ink); }

/* ============ SIMULADOR ============ */
.simulator {
    background:
        linear-gradient(rgba(35, 39, 43, 0.97), rgba(51, 59, 66, 0.97)),
        repeating-linear-gradient(90deg, transparent 0 40px, rgba(255, 183, 3, 0.05) 40px 42px);
    color: var(--white);
    padding: 5rem 0;
}
.sim-head { max-width: 680px; margin-bottom: 2.2rem; }
.sim-head .section-intro { color: #B9C3CC; }

.sim-form {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.2rem;
    align-items: end;
}
.sim-field { display: flex; flex-direction: column; gap: 0.4rem; }
.sim-field label {
    font-family: var(--mono);
    font-size: 0.72rem;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--amber);
}
.sim-field select,
.sim-field input {
    font-family: var(--body);
    font-size: 0.95rem;
    padding: 0.7rem 0.8rem;
    background: var(--mist);
    border: 1px solid var(--steel);
    color: var(--ink);
}
.sim-field select:focus,
.sim-field input:focus {
    outline: 2px solid var(--amber);
}
.sim-hint { font-size: 0.75rem; color: #9AA6B2; }
.sim-btn { align-self: end; cursor: pointer; border: 0; }

.sim-result {
    display: grid;
    grid-template-columns: 1fr 1fr 1.4fr;
    gap: 1.2rem;
    margin-top: 1.8rem;
    animation: rise 0.35s ease;
}
@keyframes rise {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}
.sim-box {
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid var(--steel);
    border-left: 4px solid var(--amber);
    padding: 1rem 1.2rem;
}
.sim-label {
    display: block;
    font-family: var(--mono);
    font-size: 0.72rem;
    letter-spacing: 0.16em;
    text-transform: uppercase;
    color: #9AA6B2;
    margin-bottom: 0.3rem;
}
.sim-box strong { font-family: var(--mono); font-size: 1.5rem; color: var(--white); }
.sim-box-note p { color: #C9D2DB; font-size: 0.9rem; }

/* ============ QUALIDADE ============ */
.quality { background: var(--white); padding: 5rem 0; }
.quality-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.6rem;
}
.quality-item {
    border: 1px solid var(--line);
    padding: 1.6rem 1.7rem;
    position: relative;
    counter-increment: qc;
}
.quality-item::before {
    content: '0' counter(qc);
    font-family: var(--mono);
    font-size: 2.4rem;
    font-weight: 700;
    color: rgba(74, 84, 94, 0.16);
    position: absolute;
    top: 0.7rem; right: 1rem;
}
.quality-item h3 { margin-bottom: 0.6rem; color: var(--ink); }
.quality-item h3::after {
    content: '';
    display: block;
    width: 34px; height: 4px;
    background: var(--safety);
    margin-top: 0.5rem;
}
.quality-item p { color: var(--steel); }

/* ============ ESTRUTURA ============ */
.structure { padding: 5rem 0; }
.structure-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.6rem;
}
.structure-grid figure { position: relative; }
.structure-grid img { height: 280px; width: 100%; object-fit: cover; }
.structure-grid figcaption {
    position: absolute;
    left: 0; bottom: 0;
    background: var(--ink);
    color: var(--white);
    font-size: 0.8rem;
    font-family: var(--mono);
    letter-spacing: 0.05em;
    padding: 0.5rem 0.9rem;
    border-top: 3px solid var(--amber);
}
.structure-text {
    grid-column: 1 / -1;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.6rem;
    color: var(--steel);
    background: var(--white);
    border: 1px solid var(--line);
    padding: 1.8rem;
}
.structure-text p { color: var(--steel); }
.structure-text h3 { margin: 1.4rem 0 0.6rem; color: var(--ink); }
.logistics-list {
    list-style: none;
    margin-top: 0.8rem;
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 0.5rem 1.4rem;
}
.logistics-list li {
    padding-left: 1.6rem;
    position: relative;
    font-size: 0.92rem;
    color: var(--steel);
}
.logistics-list li::before {
    content: '■';
    position: absolute;
    left: 0;
    color: var(--safety);
    font-size: 0.7rem;
    top: 0.22em;
}

/* ============ GUIA DE AÇOS ============ */
.guide { background: var(--ink); padding: 5rem 0; }
.guide .section-tag { color: var(--amber); }
.guide h2 { color: var(--white); }
.guide .section-intro { color: #B9C3CC; }
.table-wrap { overflow-x: auto; border: 1px solid var(--steel); }
.guide-table {
    width: 100%;
    border-collapse: collapse;
    background: var(--steel-2);
    font-size: 0.92rem;
    min-width: 720px;
}
.guide-table th {
    font-family: var(--display);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    font-size: 0.85rem;
    text-align: left;
    color: var(--amber);
    background: rgba(35, 39, 43, 0.6);
    padding: 0.9rem 1rem;
    border-bottom: 3px solid var(--safety);
}
.guide-table td {
    padding: 0.85rem 1rem;
    color: #DCE3E9;
    border-bottom: 1px solid #333B42;
    vertical-align: top;
    line-height: 1.5;
}
.guide-table tbody tr:nth-child(even) { background: rgba(74, 84, 94, 0.18); }
.guide-table td:first-child {
    font-weight: 700;
    color: var(--white);
    border-left: 4px solid var(--amber);
}
.guide-note {
    margin-top: 1.4rem;
    font-family: var(--mono);
    font-size: 0.82rem;
    letter-spacing: 0.03em;
    color: var(--amber);
    border: 1px dashed var(--steel);
    padding: 0.9rem 1.1rem;
}

/* ============ APLICAÇÕES ============ */
.apps { background: var(--mist); padding: 5rem 0; }
.apps-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.4rem;
}
.apps-card {
    background: var(--white);
    border: 1px solid var(--line);
    border-top: 4px solid var(--steel);
    padding: 1.4rem 1.5rem;
    transition: transform 0.2s ease, border-top-color 0.2s ease;
}
.apps-card:hover { transform: translateY(-4px); border-top-color: var(--safety); }
.apps-card h3 { font-size: 1.05rem; margin-bottom: 0.5rem; }
.apps-card p { font-size: 0.9rem; color: var(--steel); }

/* ============ DEPOIMENTOS ============ */
.testimonials {
    background:
        repeating-linear-gradient(-45deg, transparent 0 26px, rgba(35, 39, 43, 0.03) 26px 28px),
        var(--mist);
    padding: 5rem 0;
}
.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.6rem;
}
.testimonial {
    background: var(--white);
    border: 1px solid var(--line);
    border-bottom: 5px solid var(--steel);
    padding: 1.7rem;
    display: flex;
    flex-direction: column;
    gap: 1.3rem;
}
.testimonial p { color: var(--ink); font-style: italic; }
.testimonial footer {
    display: flex;
    align-items: center;
    gap: 0.9rem;
    border-top: 1px dashed var(--line);
    padding-top: 1.1rem;
}
.testimonial img {
    width: 54px; height: 54px;
    border-radius: 50%;
    object-fit: cover;
    border: 3px solid var(--amber);
}
.testimonial strong { display: block; font-size: 0.95rem; }
.testimonial span { font-size: 0.8rem; color: var(--steel); }

/* ============ CONTATO ============ */
.contact { background: var(--white); padding: 5rem 0; }
.contact-grid {
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: 3rem;
    align-items: start;
}
.contact-list {
    list-style: none;
    margin: 1.4rem 0 1.8rem;
}
.contact-list li {
    padding-left: 1.6rem;
    position: relative;
    margin-bottom: 0.5rem;
    color: var(--steel);
}
.contact-list li::before {
    content: '▸';
    position: absolute;
    left: 0;
    color: var(--safety);
}
.contact-card {
    background: var(--ink);
    color: var(--white);
    padding: 2rem;
    border-top: 6px solid var(--amber);
}
.contact-card h3 {
    color: var(--white);
    margin-bottom: 1rem;
}
.contact-card address { font-style: normal; color: #C9D2DB; }
.contact-card address p { margin-bottom: 0.9rem; }
.contact-note {
    font-family: var(--mono);
    font-size: 0.75rem;
    color: var(--amber);
    letter-spacing: 0.05em;
}

/* ============ AUTORIDADE ============ */
.authority { background: var(--steel-2); padding: 3.2rem 0; }
.authority h3 {
    color: var(--white);
    font-size: 1.15rem;
    margin-bottom: 1.4rem;
    letter-spacing: 0.1em;
}
.authority-links { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.2rem; }
.authority-links a {
    display: block;
    color: #DCE3E9;
    text-decoration: none;
    font-size: 0.9rem;
    padding: 0.9rem 1.1rem;
    border: 1px solid var(--steel);
    border-left: 4px solid var(--amber);
    transition: border-color 0.2s, color 0.2s;
}
.authority-links a:hover { border-left-color: var(--safety); color: var(--white); }

/* ============ FOOTER ============ */
.main-footer { background: var(--ink); color: #B9C3CC; }
.footer-grid {
    display: grid;
    grid-template-columns: 1.4fr 1fr 1fr;
    gap: 2.4rem;
    padding: 3.4rem 0 2.4rem;
}
.footer-brand strong {
    font-family: var(--display);
    font-size: 1.5rem;
    color: var(--white);
    letter-spacing: 0.06em;
}
.footer-brand em { color: var(--amber); font-style: normal; }
.footer-brand p { margin-top: 0.8rem; font-size: 0.92rem; max-width: 380px; }
.footer-nav { display: flex; flex-direction: column; gap: 0.55rem; }
.footer-nav a { color: #DCE3E9; text-decoration: none; font-size: 0.92rem; }
.footer-nav a:hover { color: var(--amber); }
.footer-authority { display: flex; flex-direction: column; gap: 0.55rem; }
.footer-authority a {
    color: #9AA6B2;
    text-decoration: none;
    font-size: 0.88rem;
    font-family: var(--mono);
    letter-spacing: 0.04em;
}
.footer-authority a:hover { color: var(--amber); }
.footer-bottom {
    border-top: 1px solid #333B42;
    padding: 1.1rem 0;
    text-align: center;
    font-size: 0.82rem;
    color: #7A8794;
}

/* ============ WHATSAPP FLOAT ============ */
.whatsapp-float {
    position: fixed;
    right: 1.4rem; bottom: 1.4rem;
    display: flex;
    align-items: center;
    gap: 0.6rem;
    background: #22C15E;
    color: var(--white);
    text-decoration: none;
    font-weight: 700;
    font-size: 0.9rem;
    padding: 0.85rem 1.2rem;
    clip-path: polygon(10px 0, 100% 0, calc(100% - 10px) 100%, 0 100%);
    box-shadow: 0 10px 26px rgba(34, 193, 94, 0.4);
    z-index: 1100;
    transition: transform 0.2s;
}
.whatsapp-float:hover { transform: translateY(-3px); }
.wa-icon {
    width: 18px; height: 18px;
    background:
        radial-gradient(circle at 30% 30%, var(--white) 3px, transparent 4px),
        radial-gradient(circle at 68% 32%, var(--white) 3px, transparent 4px),
        radial-gradient(circle at 50% 62%, var(--white) 5px, transparent 6px),
        var(--white);
    border-radius: 50%;
    clip-path: polygon(0 12%, 12% 0, 100% 0, 100% 88%, 88% 100%, 0 100%);
}

/* reveal on scroll */
.reveal { opacity: 0; transform: translateY(26px); transition: opacity 0.55s ease, transform 0.55s ease; }
.reveal.visible { opacity: 1; transform: translateY(0); }