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

:root {
    --core-blue: #0056D6;
    --core-blue-hover: #0047b3;
    --ambiental: #00C896;
    --industrial: #00E5FF;
    --smartcities: #8A2BE2;
    --energia: #A0D8EF;
    --dark: #1E1E2F;
    --gray-light: #F5F7FA;
    --gray: #E0E4E8;
    --text-dark: #2D3A4A;
    --text-light: #6B7A8A;
    --white: #FFFFFF;
}

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

h1, h2, h3, h4 {
    font-family: 'Space Grotesk', sans-serif;
    font-weight: 600;
    line-height: 1.2;
}

img {
    max-width: 100%;
    height: auto;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header */
.header {
    position: sticky;
    top: 0;
    background: rgba(255,255,255,0.98);
    backdrop-filter: blur(5px);
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
    z-index: 1000;
}

.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    min-height: 80px;
    gap: 1.5rem;
}

.logo a {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--core-blue);
    text-decoration: none;
}

.nav {
    margin-left: auto;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
    align-items: center;
}

.nav-menu a {
    text-decoration: none;
    color: var(--text-dark);
    font-weight: 500;
    transition: color 0.2s;
}

.nav-menu a:hover {
    color: var(--core-blue);
}

/* Dropdown */
.dropdown {
    position: relative;
}

.dropdown-menu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    background: white;
    box-shadow: 0 10px 20px rgba(0,0,0,0.1);
    list-style: none;
    padding: 0.5rem 0;
    border-radius: 4px;
    min-width: 180px;
}

.dropdown:hover .dropdown-menu {
    display: block;
}

.dropdown-menu li a {
    display: block;
    padding: 0.5rem 1rem;
    color: var(--text-dark);
}

.dropdown-menu li a:hover {
    background: var(--gray-light);
    color: var(--core-blue);
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 0.6rem 1.5rem;
    border-radius: 4px;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.2s;
    border: 2px solid transparent;
    cursor: pointer;
}

.btn-primary {
    background: var(--core-blue);
    color: white;
}

.btn-primary:hover {
    background: var(--core-blue-hover);
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0,86,214,0.3);
}

.btn-large {
    padding: 1rem 2.5rem;
    font-size: 1.2rem;
}

.btn-outline {
    border: 2px solid var(--core-blue);
    color: var(--core-blue);
    background: transparent;
}

.btn-outline:hover {
    background: var(--core-blue);
    color: white;
}

.mobile-toggle {
    display: none;
    font-size: 1.5rem;
    cursor: pointer;
    background: transparent;
    border: 0;
    color: var(--text-dark);
}

/* Hero */
.hero {
    padding: 80px 0;
    background: linear-gradient(135deg, var(--gray-light) 0%, white 100%);
}

.hero-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.hero-title {
    font-size: 3rem;
    margin-bottom: 1.5rem;
}

.hero-title .highlight {
    color: var(--core-blue);
}

.hero-subtitle {
    font-size: 1.2rem;
    color: var(--text-light);
    margin-bottom: 2rem;
}

.video-placeholder {
    position: relative;
    background: var(--dark);
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 20px 40px rgba(0,0,0,0.1);
}

.video-placeholder img {
    width: 100%;
    display: block;
    filter: grayscale(0.5) brightness(0.8);
}

.bounding-boxes .box,
.hs-placeholder .box {
    position: absolute;
    width: 100px;
    height: 60px;
    border: 3px solid;
    border-radius: 4px;
    pointer-events: none;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0% { opacity: 0.6; }
    50% { opacity: 1; }
    100% { opacity: 0.6; }
}

.pain-points {
    padding: 60px 0;
    background: white;
}

.section-title {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 3rem;
}

.cards-grid {
    display: grid;
    gap: 2rem;
}

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

.cards-grid.four {
    grid-template-columns: repeat(4, 1fr);
}

.card {
    background: white;
    border-radius: 8px;
    padding: 2rem;
    box-shadow: 0 5px 20px rgba(0,0,0,0.05);
    transition: transform 0.2s, box-shadow 0.2s;
    text-align: center;
}

.card:hover {
    transform: translateY(-4px);
    box-shadow: 0 10px 24px rgba(0,0,0,0.08);
}

.pain-card .icon {
    font-size: 2.5rem;
    color: var(--core-blue);
    margin-bottom: 1rem;
}

.pain-card h3 {
    margin-bottom: 1rem;
    font-size: 1.3rem;
}

/* Platform Flow */
.platform-flow {
    padding: 60px 0;
    background: var(--gray-light);
    text-align: center;
}

.flow-diagram {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 1rem;
    flex-wrap: wrap;
    margin: 3rem 0;
}

.flow-step {
    background: white;
    border-radius: 8px;
    padding: 2rem;
    flex: 1;
    min-width: 150px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.05);
}

.step-icon {
    font-size: 2.5rem;
    color: var(--core-blue);
    margin-bottom: 1rem;
}

.flow-arrow {
    font-size: 2rem;
    color: var(--core-blue);
}

.flow-note {
    font-size: 1.1rem;
    color: var(--text-light);
}

/* Vertical cards */
.vertical-card {
    position: relative;
    overflow: hidden;
    cursor: pointer;
    padding: 0;
    height: 250px;
    display: flex;
    align-items: flex-end;
    text-decoration: none;
    color: inherit;
}

.card-bg {
    position: absolute;
    inset: 0;
    background-size: cover;
    background-position: center;
    filter: grayscale(0.8) brightness(0.7);
    transition: transform 0.3s;
}

.vertical-card:hover .card-bg {
    transform: scale(1.05);
}

.card-content {
    position: relative;
    z-index: 2;
    padding: 1.5rem;
    background: linear-gradient(to top, rgba(0,0,0,0.8), transparent);
    color: white;
    width: 100%;
    text-align: left;
}

.card-content h3 {
    margin-bottom: 0.5rem;
}

.card-link {
    display: inline-block;
    margin-top: 0.5rem;
    font-weight: 600;
    color: white;
    opacity: 0.9;
}

.vertical-card[data-vertical="ambiental"] .card-link { color: var(--ambiental); }
.vertical-card[data-vertical="industrial"] .card-link { color: var(--industrial); }
.vertical-card[data-vertical="smartcities"] .card-link { color: var(--smartcities); }
.vertical-card[data-vertical="energia"] .card-link { color: var(--energia); }

/* H&S */
.hs-differential {
    padding: 60px 0;
    background: var(--gray-light);
}

.hs-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: center;
}

.hs-placeholder {
    position: relative;
    border-radius: 8px;
    overflow: hidden;
}

.hs-placeholder img {
    width: 100%;
    display: block;
    filter: grayscale(0.7);
}

/* PoC Model */
.poc-model {
    padding: 60px 0;
    text-align: center;
}

.steps {
    display: flex;
    justify-content: center;
    gap: 2rem;
    margin: 3rem 0;
    flex-wrap: wrap;
}

.step {
    flex: 1;
    min-width: 200px;
    background: white;
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.05);
}

.step-number {
    display: inline-block;
    width: 50px;
    height: 50px;
    background: var(--core-blue);
    color: white;
    border-radius: 50%;
    font-size: 1.5rem;
    font-weight: 700;
    line-height: 50px;
    margin-bottom: 1rem;
}

.poc-cta {
    margin-top: 2rem;
}

/* Footer */
.footer {
    background: var(--dark);
    color: white;
    padding: 60px 0 20px;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 3rem;
    margin-bottom: 3rem;
}

.footer-logo {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 2rem;
    font-weight: 700;
    color: white;
    margin-bottom: 1rem;
}

.footer-col h4 {
    margin-bottom: 1rem;
    color: var(--gray);
}

.footer-col ul {
    list-style: none;
}

.footer-col ul li {
    margin-bottom: 0.5rem;
}

.footer-col a {
    color: var(--gray);
    text-decoration: none;
    transition: color 0.2s;
}

.footer-col a:hover {
    color: var(--core-blue);
}

.footer-bottom {
    border-top: 1px solid rgba(255,255,255,0.1);
    padding-top: 20px;
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 1rem;
    color: var(--gray);
}

.footer-bottom a {
    color: var(--gray);
    margin-left: 1rem;
}

/* Internal pages */
.page-hero {
    padding: 80px 0;
    background: linear-gradient(135deg, var(--core-blue) 0%, #003d99 100%);
    color: white;
    text-align: center;
}

.page-hero h1 {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.page-hero p {
    font-size: 1.3rem;
    opacity: 0.9;
    max-width: 700px;
    margin: 0 auto;
}

.problem, .modules, .implementation, .poc, .content {
    padding: 60px 0;
}

.problem,
.implementation,
.form-section {
    background: var(--gray-light);
}

.modules {
    background: white;
}

.poc {
    background: var(--core-blue);
    color: white;
    text-align: center;
}

.poc .btn-primary {
    background: white;
    color: var(--core-blue);
}

/* Forms */
.form-section {
    padding: 60px 0;
}

.form-container {
    max-width: 600px;
    background: white;
    padding: 3rem;
    border-radius: 8px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
    margin: 0 auto;
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 0.8rem;
    border: 1px solid var(--gray);
    border-radius: 4px;
    font-family: inherit;
}

/* Vertical accents */
.vertical.ambiental .btn-primary { background: var(--ambiental); }
.vertical.industrial .btn-primary { background: var(--industrial); color: var(--dark); }
.vertical.smartcities .btn-primary { background: var(--smartcities); }
.vertical.energia .btn-primary { background: var(--energia); color: var(--dark); }

.vertical.ambiental .section-title,
.vertical.ambiental .hero-title .highlight { color: var(--ambiental); }
.vertical.industrial .section-title,
.vertical.industrial .hero-title .highlight { color: var(--industrial); }
.vertical.smartcities .section-title,
.vertical.smartcities .hero-title .highlight { color: var(--smartcities); }
.vertical.energia .section-title,
.vertical.energia .hero-title .highlight { color: var(--energia); }

/* Responsive */
@media (max-width: 768px) {
    .header-container {
        flex-wrap: wrap;
        padding: 1rem 0;
    }

    .mobile-toggle {
        display: block;
        margin-left: auto;
    }

    .header-cta {
        display: none;
    }

    .nav {
        display: none;
        width: 100%;
        margin-left: 0;
    }

    .nav.is-open {
        display: block;
    }

    .nav-menu {
        flex-direction: column;
        align-items: flex-start;
        gap: 1rem;
        padding: 1rem 0;
    }

    .dropdown-menu {
        position: static;
        display: block;
        box-shadow: none;
        padding-left: 1rem;
        margin-top: 0.5rem;
    }

    .hero-grid,
    .hs-grid,
    .footer-grid,
    .cards-grid.three,
    .cards-grid.four {
        grid-template-columns: 1fr;
    }

    .hero-title,
    .page-hero h1,
    .section-title {
        font-size: 2rem;
    }

    .flow-diagram,
    .steps {
        flex-direction: column;
    }

    .flow-arrow {
        transform: rotate(90deg);
    }

    .footer-bottom {
        flex-direction: column;
    }

    .footer-bottom a {
        margin-left: 0;
    }
}