/* --- CSS RESET & VARIABELEN --- */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

:root {
    /* Exacte kleuroverzetting vanuit het QCSM-logo */
    --primary-dark: #354a3e;     /* Het diepe, statige bosgroen (C=60, M=15, Y=40, K=50) */
    --primary-light: #8ba090;    /* Het frisse, zachte saliegroen (C=30, M=5, Y=20, K=10) */
    --accent-gray: #f4f6f5;      /* Ultra lichtgrijs met een subtiele groene ondertoon */
    --border-color: #e2e5e3;     /* Fijne, professionele randlijnen */
    --text-main: #2b302c;        /* Donkergrijs/antraciet (beter leesbaar dan puur zwart) */
    --text-muted: #5c645f;       /* Gematigd grijs voor secundaire teksten */
    --white: #ffffff;
    --success: #2e7d32;
    --error: #c62828;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    background-color: var(--accent-gray);
    color: var(--text-main);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

.container {
    width: 100%;
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 20px;
}

/* --- HEADER & NAVIGATIE --- */
.main-header {
    background-color: var(--white);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding-top: 15px;
    padding-bottom: 15px;
}

@media (min-width: 768px) {
    .header-container {
        flex-direction: row;
        justify-content: space-between;
        padding-top: 10px;
        padding-bottom: 10px;
    }
}

.site-logo {
    height: 55px; /* Perfecte schaal voor je logo */
    width: auto;
    display: block;
}

.tab-navigation {
    display: flex;
    gap: 5px;
    margin-top: 15px;
    background-color: #f0f2f0;
    padding: 4px;
    border-radius: 30px;
    width: 100%;
    justify-content: space-between;
}

@media (min-width: 768px) {
    .tab-navigation {
        width: auto;
        margin-top: 0;
    }
}

.tab-button {
    background: none;
    border: none;
    padding: 8px 16px;
    font-size: 14px;
    font-weight: 500;
    color: var(--text-muted);
    cursor: pointer;
    border-radius: 20px;
    transition: all 0.25s ease;
    flex-grow: 1;
    text-align: center;
}

.tab-button:hover {
    color: var(--primary-dark);
}

.tab-button.active {
    background-color: var(--primary-dark);
    color: var(--white);
}

/* --- MAIN CONTENT & TABS --- */
.main-content {
    padding-top: 40px;
    padding-bottom: 60px;
    min-height: calc(100vh - 210px);
}

.tab-content {
    display: none;
    animation: fadeIn 0.4s ease forwards;
}

.tab-content.active {
    display: block;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(8px); }
    to { opacity: 1; transform: translateY(0); }
}

/* --- HERO & INLEIDING --- */
.hero-section {
    text-align: center;
    max-width: 800px;
    margin: 0 auto 40px auto;
}

.hero-section h1 {
    font-size: 28px;
    color: var(--primary-dark);
    font-weight: 700;
    margin-bottom: 15px;
    letter-spacing: -0.5px;
}

@media (min-width: 768px) {
    .hero-section h1 {
        font-size: 36px;
    }
}

.hero-lead {
    font-size: 16px;
    color: var(--text-muted);
    font-weight: 400;
}

/* --- GRIDS & CARDS --- */
.grid-two-columns {
    display: grid;
    grid-template-columns: 1fr;
    gap: 25px;
}

@media (min-width: 768px) {
    .grid-two-columns {
        grid-template-columns: 1.1fr 0.9fr;
    }
}

.content-card {
    background-color: var(--white);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 30px;
}

.content-card h2 {
    font-size: 20px;
    color: var(--primary-dark);
    margin-bottom: 20px;
}

.content-card p {
    margin-bottom: 15px;
    color: var(--text-muted);
    font-size: 15px;
}

.focus-card {
    background-color: var(--primary-dark);
    color: var(--white);
    border: none;
}

.focus-card h2 {
    color: var(--white);
}

.focus-list {
    list-style: none;
}

.focus-list li {
    margin-bottom: 20px;
    font-size: 14px;
    line-height: 1.6;
    border-left: 3px solid var(--primary-light);
    padding-left: 15px;
}

.focus-list li strong {
    display: block;
    font-size: 15px;
    margin-bottom: 4px;
    color: var(--white);
}

/* --- SECTION HEADER --- */
.section-header {
    text-align: center;
    max-width: 700px;
    margin: 0 auto 45px auto;
}

.section-header h2 {
    font-size: 28px;
    color: var(--primary-dark);
    margin-bottom: 10px;
}

.section-lead {
    font-size: 15px;
    color: var(--text-muted);
}

/* --- CONCEPT GRID (Tab 2) --- */
.concept-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 25px;
}

@media (min-width: 768px) {
    .concept-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

.concept-card {
    background-color: var(--white);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 30px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.icon-indicator {
    font-size: 32px;
    margin-bottom: 15px;
}

.concept-card h3 {
    font-size: 18px;
    color: var(--primary-dark);
    margin-bottom: 12px;
}

.concept-card p {
    font-size: 14px;
    color: var(--text-muted);
    margin-bottom: 20px;
}

/* Status Badges */
.status-badge-blue {
    background-color: #ebf3fe;
    color: #2b6cb0;
    font-size: 12px;
    font-weight: 600;
    padding: 4px 12px;
    border-radius: 20px;
    align-self: flex-start;
}

.status-badge-green {
    background-color: #e6fffa;
    color: #234e52;
    font-size: 12px;
    font-weight: 600;
    padding: 4px 12px;
    border-radius: 20px;
    display: inline-block;
}

/* --- PORTFOLIO (Tab 3) --- */
.portfolio-list {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.portfolio-item {
    background-color: var(--white);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 30px;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

@media (min-width: 768px) {
    .portfolio-item {
        flex-direction: row;
        justify-content: space-between;
        align-items: center;
    }
}

.portfolio-info {
    max-width: 700px;
}

.portfolio-meta {
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
    color: var(--primary-light);
    display: block;
    margin-bottom: 5px;
}

.portfolio-info h3 {
    font-size: 19px;
    color: var(--primary-dark);
    margin-bottom: 10px;
}

.portfolio-info p {
    font-size: 14px;
    color: var(--text-muted);
}

/* --- CONTACT FORMULIER (Tab 4) --- */
.form-card {
    background-color: var(--white);
}

.form-group {
    margin-bottom: 18px;
}

.form-group label {
    display: block;
    font-size: 14px;
    font-weight: 500;
    margin-bottom: 6px;
    color: var(--text-main);
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 10px 14px;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    font-family: inherit;
    font-size: 14px;
    color: var(--text-main);
    background-color: #fafbfa;
    transition: border-color 0.2s;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-light);
    background-color: var(--white);
}

.submit-button {
    background-color: var(--primary-dark);
    color: var(--white);
    border: none;
    padding: 12px 24px;
    font-size: 15px;
    font-weight: 600;
    border-radius: 6px;
    cursor: pointer;
    transition: background-color 0.2s;
    width: 100%;
}

.submit-button:hover {
    background-color: #26362d;
}

.company-details {
    margin-top: 30px;
    border-top: 1px solid var(--border-color);
    padding-top: 20px;
    font-size: 14px;
    color: var(--text-muted);
}

/* Alerts */
.alert {
    padding: 12px 16px;
    border-radius: 6px;
    font-size: 14px;
    margin-bottom: 20px;
}

.alert-success {
    background-color: #e8f5e9;
    color: var(--success);
    border: 1px solid #c8e6c9;
}

.alert-danger {
    background-color: #ffebee;
    color: var(--error);
    border: 1px solid #ffcdd2;
}

/* --- FOOTER --- */
.main-footer {
    background-color: var(--primary-dark);
    color: #aebdb2;
    padding: 35px 0;
    font-size: 13px;
    border-top: 1px solid rgba(255,255,255,0.1);
}

.footer-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    text-align: center;
}

.disclaimer {
    font-size: 11px;
    color: var(--primary-light);
    max-width: 600px;
}