/* ── Fonts ── */
@font-face {
    font-family: 'Libre Baskerville';
    src: url('/fonts/Libre_Baskerville/static/LibreBaskerville-Regular.ttf') format('truetype');
    font-weight: 400;
    font-style: normal;
    font-display: swap;
}
@font-face {
    font-family: 'Libre Baskerville';
    src: url('/fonts/Libre_Baskerville/static/LibreBaskerville-Italic.ttf') format('truetype');
    font-weight: 400;
    font-style: italic;
    font-display: swap;
}
@font-face {
    font-family: 'Libre Baskerville';
    src: url('/fonts/Libre_Baskerville/static/LibreBaskerville-Bold.ttf') format('truetype');
    font-weight: 700;
    font-style: normal;
    font-display: swap;
}

/* ── Variables ── */
:root {
    --ks-header-from:   #1a2744;
    --ks-header-to:     #2d4a7a;
    --ks-accent:        #c8a96e;
    --ks-text:          #1c1c1c;
    --ks-muted:         #6b6b6b;
    --ks-bg:            #faf9f7;
    --ks-rule:          #ddd8d0;
    --ks-max-ch:        75ch;
    --ks-font-display:  'Libre Baskerville', Georgia, system-ui, sans-serif;
    --ks-font-body:     'Libre Baskerville', Georgia, system-ui, sans-serif;
}

/* ── Base ── */
html { font-size: 16px; }

body {
    font-family: var(--ks-font-body);
    font-weight: 400;
    color: var(--ks-text);
    background-color: var(--ks-bg);
    -webkit-font-smoothing: antialiased;
}

/* ── Header ── */
.ks-header {
    background: linear-gradient(135deg, var(--ks-header-from) 0%, var(--ks-header-to) 100%);
    padding: 3.5rem 1.5rem 3rem;
    position: relative;
    overflow: hidden;
}

/* subtle grain texture over gradient */
.ks-header::before {
    content: '';
    position: absolute;
    inset: 0;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.04'/%3E%3C/svg%3E");
    pointer-events: none;
    opacity: 0.35;
}

/* thin gold rule under the subtitle */
.ks-header::after {
    content: '';
    display: block;
    width: 3rem;
    height: 2px;
    background: var(--ks-accent);
    margin: 1.25rem auto 0;
}

.ks-header-inner {
    position: relative;
    text-align: center;
}

.ks-site-title {
    font-family: var(--ks-font-display);
    font-size: clamp(1.5rem, 5vw, 2.25rem);
    font-weight: 700;
    letter-spacing: -0.01em;
    color: #ffffff;
    margin: 0;
    line-height: 1.1;
}

.ks-site-title a {
    color: inherit;
    text-decoration: none;
}

.ks-site-subtitle {
    font-family: var(--ks-font-body);
    font-weight: 300;
    font-style: italic;
    font-size: clamp(0.85rem, 2vw, 1rem);
    color: rgba(255, 255, 255, 0.65);
    letter-spacing: 0.06em;
    margin: 0.6rem 0 0;
}

/* ── Content ── */
.ks-content {
    max-width: var(--ks-max-ch);
    margin: 0 auto;
    padding: 3rem 1.5rem 5rem;
}

/* ── Typography inside content ── */
.ks-content h1,
.ks-content h2,
.ks-content h3 {
    font-family: var(--ks-font-display);
    font-weight: 700;
    line-height: 1.4;
    margin-top: 2.5rem;
    margin-bottom: 0.75rem;
}

.ks-content h1 { font-size: clamp(1.75rem, 4vw, 2.5rem); }
.ks-content h2 { font-size: clamp(1.25rem, 3vw, 1.75rem); }
.ks-content h3 { font-size: 1.2rem; }

.ks-content p {
    line-height: 1.8;
    margin-bottom: 1.4rem;
}

.ks-content a {
    color: var(--ks-header-to);
    text-decoration-thickness: 1px;
    text-underline-offset: 3px;
}

.ks-content a:hover {
    color: var(--ks-accent);
}

.ks-content blockquote {
    border-left: 3px solid var(--ks-accent);
    padding-left: 1.5rem;
    margin-left: 0;
    color: var(--ks-muted);
    font-style: italic;
}

.ks-content hr {
    margin: 2.5rem 0;
}

/* Essay meta (date, category etc.) */
.ks-meta {
    font-size: 0.8rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--ks-muted);
    margin-bottom: 2rem;
}

/* ── Footer ── */
.ks-footer {
    border-top: 1px solid var(--ks-rule);
    text-align: center;
    padding: 1.5rem;
    font-size: 0.78rem;
    color: var(--ks-muted);
    letter-spacing: 0.04em;
}

.ks-content table {
    --bs-table-bg: transparent;
    --bs-table-striped-bg: rgba(0, 0, 0, 0.02);
}

/* ── Code ── */
.ks-content pre,
.ks-content pre[class*="language-"] {
    font-size: 0.95rem;
    line-height: 1.5;
    border-radius: 6px;
    margin: 1.5rem 0;
}

.ks-content code:not([class*="language-"]) {
    font-size: 0.85em;
    background: #eee;
    padding: 0.15em 0.4em;
    border-radius: 3px;
}

/* ── Accordion ── */
.ks-content .accordion {
    margin: 1.5rem 0;
}

.ks-content .accordion-item {
    background: transparent;
    border: none;
    border-top: 1px solid var(--ks-rule);
}

.ks-content .accordion-item:last-child {
    border-bottom: 1px solid var(--ks-rule);
}

.ks-content .accordion-button {
    background: transparent;
    color: var(--ks-text);
    font-family: var(--ks-font-display);
    font-size: 1rem;
    font-weight: 700;
    padding: 1rem 0;
    box-shadow: none;
}

.ks-content .accordion-button:not(.collapsed) {
    background: transparent;
    color: var(--ks-header-to);
    box-shadow: none;
}

.ks-content .accordion-button::after {
    filter: none;
    opacity: 0.4;
}

.ks-content .accordion-button:not(.collapsed)::after {
    opacity: 1;
    filter: none;
}

.ks-content .accordion-body {
    padding: 0.5rem 0 1.25rem;
}

.ks-content .accordion-body p:last-child {
    margin-bottom: 0;
}

.ks-content .accordion-header {
    margin-top: 0;
    margin-bottom: 0;
}

/* ── Cards ── */
.ks-content .ks-card {
    background: #ffffff;
    border: 1px solid var(--ks-rule);
    border-radius: 6px;
    transition: box-shadow 0.2s ease;
}

.ks-content .ks-card .card-body {
    padding: 1.5rem 1.5rem 1rem;
}

.ks-content .ks-card .card-title {
    font-family: var(--ks-font-display);
    font-size: 1.1rem;
    font-weight: 700;
    margin-top: 0.5rem;
    margin-bottom: 0.6rem;
}

.ks-content .ks-card .card-subtitle {
    font-size: 0.85rem;
    color: var(--ks-muted);
    margin-bottom: 0.75rem;
}

.ks-content .ks-card .card-text {
    font-size: 0.95rem;
    line-height: 1.65;
}

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

.ks-content .ks-card-badge {
    display: inline-block;
    font-size: 0.7rem;
    font-weight: 600;
    letter-spacing: 0.07em;
    text-transform: uppercase;
    color: var(--ks-header-to);
    background: rgba(45, 74, 122, 0.08);
    padding: 0.2em 0.6em;
    border-radius: 3px;
    margin-bottom: 0.5rem;
}

.ks-content .ks-card .card-footer {
    background: transparent;
    border-top: 1px solid var(--ks-rule);
    padding: 0.75rem 1rem;
}

.ks-content .ks-card-link {
    font-size: 0.88rem;
    font-weight: 600;
    color: var(--ks-header-to);
    text-decoration: none;
    letter-spacing: 0.02em;
}

.ks-content .ks-card-link:hover {
    color: var(--ks-accent);
}

/* ── Alerts ── */
.ks-alert {
    border-radius: 6px;
    padding: 1rem 1.25rem;
    margin: 1.5rem 0;
    border: none;
    border-left: 4px solid;
}

.ks-alert--info {
    background: rgba(45, 74, 122, 0.07);
    border-color: var(--ks-header-to);
    color: var(--ks-text);
}

.ks-alert--success {
    background: rgba(25, 135, 84, 0.07);
    border-color: #198754;
    color: var(--ks-text);
}

.ks-alert--warning {
    background: rgba(255, 193, 7, 0.12);
    border-color: #ffc107;
    color: var(--ks-text);
}

.ks-alert--danger {
    background: rgba(220, 53, 69, 0.07);
    border-color: #dc3545;
    color: var(--ks-text);
}

.ks-alert-title {
    font-family: var(--ks-font-display);
    font-weight: 700;
    font-size: 0.95rem;
    margin-bottom: 0.4rem;
}

.ks-alert-body p:last-child {
    margin-bottom: 0;
}

.ks-content li {
    line-height: 1.8;
}

.ks-content li > p {
    margin-bottom: 0.3rem;
}

.ks-content li > p:last-child {
    margin-bottom: 0;
}