/* ============================================
   Alles over CB Radio — stylesheet
   Klassieke, redactionele uitstraling
   ============================================ */

:root {
    --color-bg: #ffffff;
    --color-bg-alt: #f5f2ec;
    --color-ink: #1f2933;
    --color-ink-soft: #4a5360;
    --color-accent: #1a3a5c;
    --color-accent-dark: #122a44;
    --color-link: #b25433;
    --color-link-hover: #8a3f25;
    --color-rule: #d9d2c4;

    --font-serif: "Source Serif 4", "Iowan Old Style", Georgia, serif;
    --font-sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;

    --container-max: 1100px;
    --space-xs: 0.5rem;
    --space-sm: 1rem;
    --space-md: 1.75rem;
    --space-lg: 3rem;
    --space-xl: 5rem;
}

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

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    font-family: var(--font-sans);
    font-size: 17px;
    line-height: 1.65;
    color: var(--color-ink);
    background: var(--color-bg);
    -webkit-font-smoothing: antialiased;
}

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

a {
    color: var(--color-link);
    text-decoration: none;
    border-bottom: 1px solid transparent;
    transition: border-color 120ms ease, color 120ms ease;
}

a:hover {
    color: var(--color-link-hover);
    border-bottom-color: currentColor;
}

h1, h2, h3 {
    font-family: var(--font-serif);
    font-weight: 600;
    color: var(--color-accent);
    line-height: 1.25;
    margin: 0 0 var(--space-sm);
}

h1 { font-size: clamp(2rem, 4vw, 2.75rem); }
h2 { font-size: clamp(1.6rem, 3vw, 2.1rem); }
h3 { font-size: 1.25rem; }

p { margin: 0 0 1rem; }

.container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 1.5rem;
}

/* ---------- Header ---------- */

.site-header {
    position: sticky;
    top: 0;
    z-index: 10;
    background: var(--color-bg);
    border-bottom: 1px solid var(--color-rule);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem 1.5rem;
    gap: 1.5rem;
}

.logo {
    font-family: var(--font-serif);
    font-weight: 700;
    font-size: 1.15rem;
    color: var(--color-accent);
    border: none;
    letter-spacing: 0.01em;
}

.logo:hover { color: var(--color-accent-dark); }

.site-nav {
    display: flex;
    gap: 1.75rem;
}

.site-nav a {
    color: var(--color-ink-soft);
    font-size: 0.95rem;
    font-weight: 500;
    border: none;
}

.site-nav a:hover {
    color: var(--color-accent);
}

/* ---------- Hero ---------- */

.hero {
    position: relative;
    background: linear-gradient(rgba(18, 42, 68, 0.78), rgba(18, 42, 68, 0.78)), url("../img/hero.svg") center/cover no-repeat;
    background-color: var(--color-accent-dark);
    color: #fff;
    padding: var(--space-xl) 0;
}

.hero-inner {
    max-width: 720px;
}

.hero h1 {
    color: #fff;
    margin-bottom: 1rem;
}

.hero .lead {
    font-size: 1.15rem;
    color: rgba(255, 255, 255, 0.88);
    margin-bottom: 2rem;
    max-width: 560px;
}

.btn {
    display: inline-block;
    background: var(--color-link);
    color: #fff;
    padding: 0.75rem 1.5rem;
    font-family: var(--font-sans);
    font-weight: 500;
    font-size: 0.95rem;
    border: none;
    border-radius: 2px;
    transition: background 120ms ease;
}

.btn:hover {
    background: var(--color-link-hover);
    color: #fff;
    border: none;
}

/* ---------- Sections ---------- */

.section {
    padding: var(--space-xl) 0;
    border-bottom: 1px solid var(--color-rule);
}

.section-alt {
    background: var(--color-bg-alt);
}

.section-title {
    text-align: center;
    margin-bottom: var(--space-lg);
}

.section-title::after {
    content: "";
    display: block;
    width: 48px;
    height: 2px;
    background: var(--color-link);
    margin: 0.75rem auto 0;
}

/* ---------- Two column layout ---------- */

.two-col {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-lg);
    align-items: center;
}

.two-col.reverse .two-col-img {
    order: 2;
}

.two-col-img img {
    width: 100%;
    aspect-ratio: 4 / 3;
    object-fit: cover;
    background: var(--color-bg-alt);
    border: 1px solid var(--color-rule);
}

/* ---------- Cards ---------- */

.cards {
    display: grid;
    gap: 1.5rem;
}

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

.card {
    background: #fff;
    border: 1px solid var(--color-rule);
    padding: 1.75rem;
}

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

.card-meta {
    color: var(--color-link);
    font-size: 0.85rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 0.75rem;
}

.card p:last-child {
    margin-bottom: 0;
}

/* ---------- Tip icons ---------- */

.tip-icon {
    width: 36px;
    height: 36px;
    color: var(--color-accent);
    margin-bottom: 1rem;
    display: block;
}

/* ---------- Footer ---------- */

.site-footer {
    background: var(--color-accent-dark);
    color: rgba(255, 255, 255, 0.75);
    padding: 2rem 0;
    text-align: center;
    font-size: 0.9rem;
}

.site-footer p { margin: 0; }

/* ---------- Responsive ---------- */

@media (max-width: 820px) {
    .two-col {
        grid-template-columns: 1fr;
        gap: var(--space-md);
    }

    .two-col.reverse .two-col-img {
        order: 0;
    }

    .cards.three {
        grid-template-columns: 1fr;
    }

    .hero {
        padding: var(--space-lg) 0;
    }

    .section {
        padding: var(--space-lg) 0;
    }
}

@media (max-width: 560px) {
    .header-inner {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.75rem;
    }

    .site-nav {
        gap: 1rem;
        flex-wrap: wrap;
    }
}