/* ========================================
   RESET & BASE STYLES
   ======================================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
    min-height: 100%;
    -webkit-text-size-adjust: 100%;
    text-size-adjust: 100%;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    line-height: 1.6;
    color: var(--color-text);
    background-color: var(--bg-color);
    background-image: none;
    min-height: 100vh;
    min-height: 100dvh;
    width: 100%;
}

h1, h2, h3, h4, h5, h6 {
    font-family: 'Lora', serif;
    font-weight: 600;
    line-height: 1.3;
    margin-bottom: 1rem;
}

h1 {
    font-size: 3.5rem;
    letter-spacing: -0.02em;
}

h2 {
    font-size: 2.5rem;
    letter-spacing: -0.01em;
}

h3 {
    font-size: 1.75rem;
}

p {
    margin-bottom: 1rem;
    font-weight: 300;
}

a {
    color: var(--color-primary);
    text-decoration: none;
    transition: color 0.3s ease;
}

a:hover {
    color: var(--color-accent-warm);
}

a:focus-visible,
button:focus-visible,
.nav-link:focus-visible,
.chapter-link:focus-visible,
.btn-download:focus-visible,
.btn-download-main:focus-visible,
.btn-view-maps:focus-visible,
.burger-menu:focus-visible {
    outline: 2px solid var(--color-accent-warm);
    outline-offset: 2px;
}

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

section {
    scroll-margin-top: calc(var(--header-height) + 40px);
}

/* ========================================
   RENDER PERFORMANCE
   Skip off-screen layout/paint for long pages.
   ======================================== */
main > section,
.content-section,
.chapter-page-section,
.maps-page-section,
.photo-page-section {
    content-visibility: auto;
    contain-intrinsic-size: 1px 900px;
}

@media (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto;
    }

    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}