:root {
    --primary: #3b6965;
    --primary-dark: #1f3d3a;
    --accent: #f4b942;
    --accent-soft: #fff6dc;
    --text: #1e2a36;
    --muted: #5d6a75;
    --line: #e8edf2;
    --bg: #f6f9fc;
    --white: #ffffff;
    --success: #1f9d64;
    --danger: #c94f4f;
    --shadow: 0 18px 45px rgba(31, 61, 58, 0.16);
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    font-family: 'Inter', sans-serif;
    color: var(--text);
    background: var(--bg);
    line-height: 1.6;
}

a {
    color: inherit;
    text-decoration: none;
}

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

.container {
    width: min(1120px, calc(100% - 32px));
    margin: 0 auto;
}

.topbar {
    position: sticky;
    top: 0;
    z-index: 20;
    background: rgba(31, 61, 58, 0.92);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(255,255,255,0.08);
}

.nav-wrap {
    display: flex;
    align-items: center;
    justify-content: space-between;
    min-height: 76px;
    gap: 24px;
}

.brand {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    color: var(--white);
    font-weight: 700;
    letter-spacing: 0.02em;
}

.brand-mark {
    display: inline-flex;
    width: 36px;
    height: 36px;
    border-radius: 12px;
    object-fit: cover;
}

.main-nav {
    display: flex;
    align-items: center;
    gap: 22px;
}

.main-nav a {
    color: rgba(255,255,255,0.86);
    font-size: 0.96rem;
    font-weight: 500;
    transition: color 0.2s ease;
}

.main-nav a:hover,
.main-nav a:focus {
    color: var(--white);
}

.nav-toggle {
    display: none;
    width: 46px;
    height: 46px;
    border: 1px solid rgba(255,255,255,0.2);
    background: transparent;
    border-radius: 10px;
    cursor: pointer;
}

.nav-toggle span {
    display: block;
    width: 22px;
    height: 2px;
    margin: 5px auto;
    background: var(--white);
    border-radius: 999px;
}

.hero {
    position: relative;
    background: linear-gradient(120deg, rgba(59, 105, 101,0.88), rgba(59, 105, 101,0.68)),
        url('/assets/images/hero-construcao.jpg') center/cover no-repeat;
    padding: 112px 0 72px;
}

.hero-content {
    display: grid;
    grid-template-columns: 1.3fr 0.7fr;
    gap: 40px;
    align-items: center;
}

.hero-copy {
    color: var(--white);
}

.eyebrow,
.section-tag {
    display: inline-block;
    padding: 8px 14px;
    border-radius: 999px;
    background: rgba(255,255,255,0.12);
    border: 1px solid rgba(255,255,255,0.15);
    font-size: 0.75rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    font-weight: 700;
}

.hero-copy h1 {
    margin: 18px 0 18px;
    font-size: clamp(2.5rem, 5vw, 4.5rem);
    line-height: 1.05;
    max-width: 660px;
}

.hero-copy p {
    max-width: 620px;
    color: rgba(255,255,255,0.8);
    font-size: 1.08rem;
    margin: 0 0 28px;
}

.hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 14px;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 48px;
    padding: 0 22px;
    border-radius: 12px;
    font-weight: 700;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.btn:hover {
    transform: translateY(-1px);
}

.btn-primary {
    background: var(--accent);
    color: var(--primary-dark);
    box-shadow: 0 14px 25px rgba(244,185,66,0.28);
}

.btn-secondary {
    background: rgba(255,255,255,0.08);
    color: var(--white);
    border: 1px solid rgba(255,255,255,0.22);
}

.hero-card {
    background: rgba(255,255,255,0.96);
    border-radius: 22px;
    padding: 28px 26px;
    box-shadow: var(--shadow);
    color: var(--text);
}

.card-badge {
    display: inline-flex;
    padding: 8px 12px;
    border-radius: 999px;
    background: var(--accent-soft);
    color: var(--primary-dark);
    font-size: 0.76rem;
    font-weight: 800;
    letter-spacing: 0.06em;
    text-transform: uppercase;
}

.hero-card h2 {
    margin: 18px 0 16px;
    font-size: 1.75rem;
}

.hero-card ul {
    margin: 0;
    padding-left: 18px;
    color: var(--muted);
}

.hero-card li + li {
    margin-top: 10px;
}

.stats {
    background: var(--white);
    padding: 34px 0;
    border-bottom: 1px solid var(--line);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 22px;
}

.stat-item {
    text-align: center;
    padding: 14px 12px;
}

.stat-item strong {
    display: block;
    font-size: clamp(1.8rem, 4vw, 2.5rem);
    color: var(--primary);
}

.stat-item span {
    color: var(--muted);
}

.section {
    padding: 90px 0;
}

.section-alt {
    background: linear-gradient(180deg, #f1f6fb, #eef5f8);
}

.two-columns {
    display: grid;
    grid-template-columns: 0.9fr 1.1fr;
    gap: 40px;
    align-items: start;
}

.section-heading {
    margin-bottom: 26px;
}

.section-heading h2,
.two-columns h2 {
    margin: 18px 0 0;
    font-size: clamp(2rem, 3vw, 2.8rem);
    line-height: 1.15;
}

.two-columns p {
    margin: 0 0 18px;
    color: var(--muted);
    font-size: 1.04rem;
}

.card-grid {
    display: grid;
    gap: 26px;
}

.three-columns {
    grid-template-columns: repeat(3, minmax(0, 1fr));
}

.info-card {
    background: var(--white);
    border: 1px solid var(--line);
    border-radius: 20px;
    padding: 28px 24px;
    box-shadow: 0 10px 24px rgba(12, 35, 55, 0.04);
}

.icon {
    display: inline-flex;
    width: 56px;
    height: 56px;
    border-radius: 16px;
    align-items: center;
    justify-content: center;
    background: var(--accent-soft);
    font-size: 1.9rem;
    margin-bottom: 16px;
}

.info-card h3 {
    margin: 0 0 14px;
    font-size: 1.35rem;
}

.info-card ul {
    margin: 0;
    padding-left: 18px;
    color: var(--muted);
}

.info-card li + li {
    margin-top: 8px;
}

.feature-list {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 22px;
}

.feature-item {
    background: var(--white);
    border: 1px solid var(--line);
    border-radius: 18px;
    padding: 26px 22px;
}

.feature-item h3 {
    margin: 0 0 10px;
    font-size: 1.2rem;
}

.feature-item p {
    margin: 0;
    color: var(--muted);
}

.showcase {
    background: var(--white);
}

.project-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 20px;
}

.project-card {
    position: relative;
    min-height: 330px;
    overflow: hidden;
    border-radius: 24px;
    background-size: cover;
    background-position: center;
    box-shadow: var(--shadow);
}

.project-one {
    background-image: linear-gradient(180deg, rgba(31, 61, 58,0.08), rgba(31, 61, 58,0.72)), url('/assets/images/projeto-eletrica.jpg');
}

.project-two {
    background-image: linear-gradient(180deg, rgba(31, 61, 58,0.08), rgba(31, 61, 58,0.72)), url('/assets/images/projeto-hidraulica.jpg');
}

.project-three {
    background-image: linear-gradient(180deg, rgba(31, 61, 58,0.08), rgba(31, 61, 58,0.72)), url('/assets/images/projeto-obra.jpg');
}

.project-overlay {
    position: absolute;
    inset: auto 0 0 0;
    padding: 22px 20px;
    background: linear-gradient(180deg, transparent, rgba(31, 61, 58,0.78));
    color: var(--white);
}

.project-overlay span {
    display: inline-block;
    font-size: 0.72rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    opacity: 0.75;
}

.project-overlay h3 {
    margin: 12px 0 0;
    font-size: 1.45rem;
}

.cta-section {
    padding-top: 0;
}

.cta-box {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 22px;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: var(--white);
    border-radius: 22px;
    padding: 34px 30px;
    box-shadow: var(--shadow);
}

.cta-box h2 {
    margin: 16px 0 0;
    font-size: clamp(1.9rem, 4vw, 2.8rem);
    line-height: 1.15;
}

.dark-tag {
    background: rgba(255,255,255,0.12);
    border: 1px solid rgba(255,255,255,0.16);
    color: var(--white);
}

.page-hero {
    padding: 90px 0 50px;
    background: linear-gradient(120deg, var(--primary), var(--primary-dark));
    color: var(--white);
}

.page-hero.compact {
    padding-top: 70px;
}

.page-hero h1 {
    margin: 18px 0 0;
    font-size: clamp(2.1rem, 5vw, 3.3rem);
}

.contact-grid {
    display: grid;
    grid-template-columns: 0.85fr 1.15fr;
    gap: 28px;
    align-items: start;
}

.contact-card {
    background: var(--white);
    border: 1px solid var(--line);
    border-radius: 20px;
    padding: 28px;
    box-shadow: 0 12px 28px rgba(59, 105, 101,0.05);
}

.contact-card h2 {
    margin-top: 0;
}

.contact-list {
    list-style: none;
    margin: 0;
    padding: 0;
    color: var(--muted);
}

.contact-list li + li {
    margin-top: 14px;
}

.form-card form {
    display: grid;
    gap: 18px;
}

.field-group {
    display: grid;
    gap: 8px;
}

.field-group label {
    font-weight: 600;
}

.field-group input,
.field-group textarea {
    width: 100%;
    border: 1px solid var(--line);
    border-radius: 12px;
    padding: 14px 16px;
    font: inherit;
    background: #f9fbfd;
    color: var(--text);
}

.field-group input:focus,
.field-group textarea:focus {
    outline: 2px solid rgba(59, 105, 101, 0.18);
    border-color: rgba(59, 105, 101, 0.28);
}

.alert {
    border-radius: 12px;
    padding: 16px 18px;
    margin-bottom: 18px;
    font-weight: 500;
}

.alert.success {
    background: rgba(31,157,100,0.08);
    color: var(--success);
    border: 1px solid rgba(31,157,100,0.18);
}

.alert.danger {
    background: rgba(201,79,79,0.07);
    color: var(--danger);
    border: 1px solid rgba(201,79,79,0.18);
}

.alert ul {
    margin: 0;
    padding-left: 18px;
}

.site-footer {
    background: #10231f;
    color: rgba(255,255,255,0.8);
    padding-top: 42px;
}

.footer-grid {
    display: grid;
    grid-template-columns: 1.2fr 1fr 0.8fr;
    gap: 30px;
    padding-bottom: 26px;
}

.site-footer h3,
.site-footer h4 {
    color: var(--white);
    margin-top: 0;
}

.site-footer p,
.site-footer li,
.site-footer a {
    color: rgba(255,255,255,0.7);
}

.site-footer ul {
    list-style: none;
    margin: 0;
    padding: 0;
}

.site-footer li + li {
    margin-top: 10px;
}

.footer-bottom {
    border-top: 1px solid rgba(255,255,255,0.08);
    padding: 16px 0 20px;
}

@media (max-width: 900px) {
    .hero-content,
    .two-columns,
    .contact-grid,
    .three-columns,
    .project-grid,
    .footer-grid,
    .stats-grid {
        grid-template-columns: 1fr;
    }

    .feature-list {
        grid-template-columns: 1fr;
    }

    .cta-box {
        flex-direction: column;
        align-items: flex-start;
    }

    .main-nav {
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        display: none;
        flex-direction: column;
        align-items: flex-start;
        padding: 18px 20px 24px;
        background: rgba(31, 61, 58, 0.98);
    }

    .nav-open .main-nav {
        display: flex;
    }

    .nav-toggle {
        display: block;
    }
}