/* Conteo Design System - Minimal/Swiss Edition + Blue Softness */
:root {
    /* Colors */
    --bg-main: #ffffff;
    --bg-secondary: #f4f4f4;
    --text-main: #000000;
    --text-muted: #555555;

    /* Accents */
    --border-color: #000000;
    --primary: #000000;
    --accent-blue: #e0f7fa;
    /* Very soft light blue */
    --accent-blue-hover: #b2ebf2;

    /* Spacing & Sizes */
    --nav-height: 90px;
    --container-width: 1200px;
    --border-width: 2px;

    /* Font Families */
    --font-main: 'Nunito', sans-serif;
}

/* ============================================
   RESET & BASE
   ============================================ */

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-main);
    background-color: var(--bg-main);
    color: var(--text-main);
    font-size: 1rem;
    line-height: 1.6;
}

h1, h2, h3, h4 {
    font-weight: 700;
    line-height: 1.1;
}

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

ul {
    list-style: none;
}

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

/* ============================================
   LAYOUT
   ============================================ */

.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 2rem;
}

/* ============================================
   BUTTONS
   ============================================ */

.btn {
    display: inline-block;
    padding: 0.75rem 1.75rem;
    font-size: 0.8rem;
    font-weight: 700;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    border: var(--border-width) solid var(--border-color);
    cursor: pointer;
    transition: background-color 0.2s ease, color 0.2s ease;
}

.btn-primary {
    background-color: var(--primary);
    color: var(--bg-main);
}

.btn-primary:hover {
    background-color: #333333;
}

.btn-secondary {
    background-color: transparent;
    color: var(--text-main);
}

.btn-secondary:hover {
    background-color: var(--text-main);
    color: var(--bg-main);
}

/* ============================================
   HEADER / NAVIGATION
   ============================================ */

#header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: var(--nav-height);
    background-color: var(--bg-main);
    border-bottom: var(--border-width) solid var(--border-color);
    z-index: 1000;
    display: flex;
    align-items: center;
}

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
}

.logo {
    height: 40px;
    width: auto;
}

#header ul {
    display: flex;
    gap: 2.5rem;
}

#header ul li a {
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    padding: 0.25rem 0;
    border-bottom: 2px solid transparent;
    transition: border-color 0.2s ease;
}

#header ul li a:hover,
#header ul li a.active {
    border-bottom-color: var(--primary);
}

.mobile-toggle {
    display: none;
    font-size: 1.75rem;
    cursor: pointer;
}

/* ============================================
   HERO SECTION
   ============================================ */

.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: var(--nav-height);
    background-color: var(--bg-main);
    position: relative;
    overflow: hidden;
}

.hero::after {
    content: '';
    position: absolute;
    top: var(--nav-height);
    right: 0;
    width: 35%;
    height: calc(100% - var(--nav-height));
    background-color: var(--accent-blue);
    z-index: 0;
    border-left: var(--border-width) solid var(--border-color);
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 700px;
}

.hero-content h1 {
    font-size: clamp(3rem, 7vw, 6.5rem);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: -0.02em;
    margin-bottom: 1.5rem;
    line-height: 1;
}

.hero-content p {
    font-size: 1.1rem;
    color: var(--text-muted);
    max-width: 500px;
    margin-bottom: 2.5rem;
}

.hero-btns {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

/* ============================================
   SOLUTIONS / SERVICES SECTION
   ============================================ */

.solutions {
    padding: 120px 0;
    background-color: var(--bg-main);
    border-top: var(--border-width) solid var(--border-color);
    border-bottom: var(--border-width) solid var(--border-color);
}

.solutions-header {
    margin-bottom: 4rem;
}

.solutions-header h2 {
    font-size: 2.5rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: -0.02em;
    margin-bottom: 0.75rem;
}

.solutions-header p {
    color: var(--text-muted);
    font-size: 1.1rem;
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    border-left: var(--border-width) solid var(--border-color);
}

.service-card {
    padding: 2.5rem;
    border-right: var(--border-width) solid var(--border-color);
    border-top: var(--border-width) solid var(--border-color);
}

.service-icon {
    font-size: 2.5rem;
    margin-bottom: 1.25rem;
    color: var(--primary);
}

.service-card h3 {
    font-size: 1rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-bottom: 0.75rem;
}

.service-card p {
    color: var(--text-muted);
    font-size: 0.95rem;
}

/* ============================================
   ABOUT SECTION
   ============================================ */

.about {
    padding: 120px 0;
    background-color: var(--bg-main);
}

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

.about-content h2 {
    font-size: 3rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: -0.02em;
    margin-bottom: 1.5rem;
}

.about-content p {
    color: var(--text-muted);
    font-size: 1rem;
    margin-bottom: 1rem;
}

.about-img {
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--accent-blue);
    border: var(--border-width) solid var(--border-color);
    aspect-ratio: 1/1;
    max-width: 450px;
}

/* ============================================
   PROJECTEN SECTION
   ============================================ */

.projecten {
    padding: 100px 0;
    background-color: var(--bg-secondary);
}

.projecten .container > h2 {
    font-size: 2.5rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: -0.02em;
    margin-bottom: 1rem;
}

.projecten .container > p {
    color: var(--text-muted);
    font-size: 1.1rem;
    margin-bottom: 3rem;
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

.project-card {
    background-color: var(--bg-main);
    border: var(--border-width) solid var(--border-color);
    padding: 2rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.project-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 24px rgba(0,0,0,0.08);
}

.project-icon {
    font-size: 2.5rem;
    color: var(--primary);
}

.project-card h3 {
    font-size: 1.2rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.project-card p {
    color: var(--text-muted);
    font-size: 0.95rem;
    flex: 1;
}

.project-card .btn {
    align-self: flex-start;
    margin-top: auto;
}

.projecten-cta {
    margin-top: 3rem;
    padding: 2.5rem;
    background-color: var(--bg-main);
    border: var(--border-width) solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 2rem;
    flex-wrap: wrap;
}

.projecten-cta p {
    color: var(--text-muted);
    font-size: 1rem;
    max-width: 520px;
    margin-bottom: 0;
}

/* ============================================
   FOOTER / CONTACT
   ============================================ */

footer {
    background-color: var(--bg-main);
    border-top: var(--border-width) solid var(--border-color);
    padding: 80px 0 40px;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 4rem;
    margin-bottom: 3rem;
}

.footer-info p {
    color: var(--text-muted);
    font-size: 0.95rem;
    max-width: 280px;
}

.footer-links h4 {
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    margin-bottom: 1.25rem;
}

.footer-links ul li {
    margin-bottom: 0.6rem;
}

.footer-links ul li a {
    color: var(--text-muted);
    font-size: 0.9rem;
    transition: color 0.2s ease;
}

.footer-links ul li a:hover {
    color: var(--text-main);
}

.copyright {
    border-top: 1px solid #e0e0e0;
    padding-top: 1.5rem;
}

.copyright p {
    font-size: 0.8rem;
    color: var(--text-muted);
    text-align: center;
}

/* ============================================
   RESPONSIVE
   ============================================ */

@media (max-width: 900px) {
    .services-grid {
        grid-template-columns: 1fr;
    }

    .about-grid {
        grid-template-columns: 1fr;
    }

    .footer-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .projects-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 700px) {
    #header ul {
        display: none;
        flex-direction: column;
        position: absolute;
        top: var(--nav-height);
        left: 0;
        width: 100%;
        background-color: var(--bg-main);
        border-bottom: var(--border-width) solid var(--border-color);
        padding: 1.5rem 2rem;
        gap: 1rem;
    }

    #header ul.open {
        display: flex;
    }

    .mobile-toggle {
        display: block;
    }

    .hero::after {
        display: none;
    }
}