/* ==========================================================================
   Base — Reset, Typography, Utilities
   ========================================================================== */

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

html {
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: var(--font-body);
    font-size: var(--fs-base);
    font-weight: var(--fw-regular);
    line-height: var(--lh-normal);
    color: var(--color-text);
    background-color: var(--color-bg);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

a {
    color: var(--color-primary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--color-primary-light);
}

a:focus-visible {
    outline: 3px solid var(--color-accent);
    outline-offset: 2px;
    border-radius: var(--radius-sm);
}

ul, ol {
    list-style: none;
}

/* --- Typography --- */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: var(--fw-bold);
    line-height: var(--lh-tight);
    color: var(--color-primary);
}

h1 { font-size: var(--fs-4xl); }
h2 { font-size: var(--fs-3xl); }
h3 { font-size: var(--fs-2xl); }
h4 { font-size: var(--fs-xl); }
h5 { font-size: var(--fs-lg); }
h6 { font-size: var(--fs-md); }

p {
    margin-bottom: var(--space-md);
}

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

/* --- Layout --- */
.container {
    width: 100%;
    max-width: var(--container-max);
    margin-inline: auto;
    padding-inline: var(--container-padding);
}

.container--narrow {
    max-width: var(--container-narrow);
}

.container--wide {
    max-width: var(--container-wide);
}

.site-main {
    min-height: 60vh;
}

/* --- Section --- */
.section {
    padding-block: var(--space-section);
}

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

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

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

.section--bg-primary h2,
.section--bg-primary h3,
.section--bg-primary h4 {
    color: var(--color-bg-white);
}

.section-header {
    text-align: center;
    max-width: 700px;
    margin-inline: auto;
    margin-bottom: var(--space-2xl);
}

.section-header p {
    color: var(--color-text-light);
    font-size: var(--fs-md);
    margin-top: var(--space-sm);
}

.section-label {
    display: inline-block;
    font-family: var(--font-heading);
    font-size: var(--fs-sm);
    font-weight: var(--fw-semibold);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-secondary);
    margin-bottom: var(--space-sm);
}

/* --- Grid Utilities --- */
.grid {
    display: grid;
    gap: var(--space-xl);
}

.grid--2 { grid-template-columns: repeat(2, 1fr); }
.grid--3 { grid-template-columns: repeat(3, 1fr); }
.grid--4 { grid-template-columns: repeat(4, 1fr); }

@media (max-width: 1024px) {
    .grid--4 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
    .grid--2,
    .grid--3,
    .grid--4 { grid-template-columns: 1fr; }
}

/* --- Accessibility --- */
.skip-link {
    position: absolute;
    top: -100%;
    left: var(--space-md);
    background: var(--color-primary);
    color: var(--color-bg-white);
    padding: var(--space-sm) var(--space-md);
    border-radius: var(--radius-md);
    z-index: var(--z-modal);
    font-weight: var(--fw-semibold);
}

.skip-link:focus {
    top: var(--space-md);
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* --- Posts grid --- */
.posts-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: var(--space-xl);
}

/* --- Pagination --- */
.nav-links {
    display: flex;
    justify-content: center;
    gap: var(--space-sm);
    padding-top: var(--space-2xl);
}

.nav-links a,
.nav-links span {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 44px;
    height: 44px;
    padding: var(--space-sm) var(--space-md);
    border-radius: var(--radius-md);
    font-weight: var(--fw-semibold);
    transition: background var(--transition-fast), color var(--transition-fast);
}

.nav-links a {
    background: var(--color-bg-white);
    border: 1px solid var(--color-border);
}

.nav-links a:hover {
    background: var(--color-primary);
    color: var(--color-bg-white);
    border-color: var(--color-primary);
}

.nav-links .current {
    background: var(--color-primary);
    color: var(--color-bg-white);
}

/* --- Fade-in animation --- */
.fade-in {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity var(--transition-slow), transform var(--transition-slow);
}

.fade-in.is-visible {
    opacity: 1;
    transform: translateY(0);
}

/* --- Page Header (interior pages) --- */
.page-header {
    background: var(--gradient-primary);
    color: var(--color-bg-white);
    padding: var(--space-4xl) 0 var(--space-3xl);
    text-align: center;
}

.page-header h1 {
    color: var(--color-bg-white);
    margin-bottom: var(--space-sm);
}

.page-header p {
    font-size: var(--fs-lg);
    opacity: 0.9;
    max-width: 650px;
    margin-inline: auto;
}

.page-header__label {
    display: inline-block;
    font-family: var(--font-heading);
    font-size: var(--fs-sm);
    font-weight: var(--fw-semibold);
    text-transform: uppercase;
    letter-spacing: 0.12em;
    color: rgba(255, 255, 255, 0.65);
    margin-bottom: var(--space-sm);
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    html { scroll-behavior: auto; }
}