/* ═══════════════════════════════════════════════════
   OS Shaman — Shared Styles
   Dark-first, respects prefers-color-scheme
   ═══════════════════════════════════════════════════ */

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* ── Color tokens (dark default) ── */
:root {
    --bg-primary: #14161c;
    --bg-secondary: #1a1c24;
    --bg-card: #1e2028;
    --text-primary: #c8cdd7;
    --text-heading: #e0e4eb;
    --text-muted: #828a9b;
    --accent: #8c94a5;
    --border: #2a2d38;
    --link: #9aa3b4;
    --link-hover: #c8cdd7;
    --svg-fill: #828a9b;
    --svg-fill-light: #3a3e4c;
    --svg-stroke: #4a4f60;
    --logo-filter: invert(1) brightness(0.65);
    --logo-bg-filter: invert(1);
    color-scheme: dark light;
}

/* ── Light via system preference (when not forced dark) ── */
@media (prefers-color-scheme: light) {
    :root:not([data-theme="dark"]) {
        --bg-primary: #f8f8fa;
        --bg-secondary: #eeeef2;
        --bg-card: #ffffff;
        --text-primary: #3a3d47;
        --text-heading: #1a1c24;
        --text-muted: #6b7080;
        --accent: #5a6172;
        --border: #d8dae0;
        --link: #5a6172;
        --link-hover: #1a1c24;
        --svg-fill: #6b7080;
        --svg-fill-light: #d0d2d8;
        --svg-stroke: #8890a0;
        --logo-filter: brightness(0.35);
        --logo-bg-filter: none;
        color-scheme: light;
    }
}

/* ── Light via explicit toggle ── */
:root[data-theme="light"] {
    --bg-primary: #f8f8fa;
    --bg-secondary: #eeeef2;
    --bg-card: #ffffff;
    --text-primary: #3a3d47;
    --text-heading: #1a1c24;
    --text-muted: #6b7080;
    --accent: #5a6172;
    --border: #d8dae0;
    --link: #5a6172;
    --link-hover: #1a1c24;
    --svg-fill: #6b7080;
    --svg-fill-light: #d0d2d8;
    --svg-stroke: #8890a0;
    --logo-filter: brightness(0.35);
    --logo-bg-filter: none;
    color-scheme: light;
}

/* ── Theme toggle ── */
.theme-toggle {
    position: fixed;
    top: 1rem;
    right: 1rem;
    z-index: 100;
    display: flex;
    gap: 0;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 20px;
    padding: 3px;
    font-family: inherit;
    transition: background 0.2s, border-color 0.2s;
}

.theme-toggle button {
    background: none;
    border: none;
    padding: 5px 10px;
    border-radius: 16px;
    cursor: pointer;
    font-size: 13px;
    line-height: 1;
    color: var(--text-muted);
    transition: background 0.2s, color 0.2s;
    font-family: inherit;
}

.theme-toggle button:hover {
    color: var(--text-heading);
}

.theme-toggle button.active {
    background: var(--bg-secondary);
    color: var(--text-heading);
}

@media (max-width: 480px) {
    .theme-toggle {
        top: 0.5rem;
        right: 0.5rem;
    }
    .theme-toggle button {
        padding: 4px 7px;
        font-size: 12px;
    }
}

/* ── Fixed controls group (toggle + nav) ── */
.fixed-controls {
    position: fixed;
    top: 1rem;
    right: 1rem;
    z-index: 100;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.35rem;
}

.fixed-controls .theme-toggle {
    position: static;
}

/* ── Article nav arrows ── */
.fixed-nav {
    display: flex;
    gap: 0.25rem;
}

.fixed-nav a,
.fixed-nav span {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 28px;
    border-radius: 6px;
    font-size: 14px;
    line-height: 1;
    text-decoration: none;
    transition: background 0.2s, color 0.2s;
}

.fixed-nav a {
    color: var(--text-muted);
    cursor: pointer;
}

.fixed-nav a:hover {
    color: var(--text-heading);
    background: var(--bg-card);
}

.fixed-nav .disabled {
    color: var(--text-muted);
    opacity: 0.25;
    cursor: default;
}

@media (max-width: 480px) {
    .fixed-controls {
        top: 0.5rem;
        right: 0.5rem;
    }
    .fixed-nav a,
    .fixed-nav span {
        width: 28px;
        height: 24px;
        font-size: 12px;
    }
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
}

a {
    color: var(--link);
    text-decoration: none;
    transition: color 0.2s;
}

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


/* ═══════════════════════════════════════════════════
   Homepage styles
   ═══════════════════════════════════════════════════ */

/* ── Hero ── */
.hero {
    min-height: 50vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 3rem 2rem 2rem;
    position: relative;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    right: -10%;
    top: 45%;
    transform: translateY(-50%);
    width: 500px;
    height: 500px;
    opacity: 0.06;
    pointer-events: none;
}

.hero-bg img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    filter: var(--logo-bg-filter);
}

.hero-content {
    max-width: 800px;
    position: relative;
    z-index: 1;
}

.hero-logo {
    width: 80px;
    height: 80px;
    margin-bottom: 2.5rem;
    filter: var(--logo-filter);
}

.hero-title {
    font-size: 3.2rem;
    font-weight: 700;
    color: var(--text-heading);
    line-height: 1.15;
    margin-bottom: 0.3rem;
}

.hero-subtitle {
    font-size: 1.8rem;
    font-weight: 300;
    color: var(--text-muted);
    margin-bottom: 2rem;
}

.hero-tagline {
    font-size: 1.25rem;
    color: var(--text-primary);
    font-weight: 400;
    max-width: 620px;
    line-height: 1.7;
}

/* ── Sections ── */
.section {
    padding: 5rem 2rem;
    max-width: 800px;
    margin: 0 auto;
}

.section-title {
    font-size: 1.6rem;
    font-weight: 600;
    color: var(--text-heading);
    margin-bottom: 1.5rem;
}

.section p {
    margin-bottom: 1.25rem;
    font-size: 1.05rem;
}

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

/* ── Divider ── */
.divider {
    max-width: 800px;
    margin: 0 auto;
    border: none;
    border-top: 1px solid var(--border);
}

/* ── Work With section ── */
.work-with-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
    margin-top: 1.5rem;
}

.work-with-item {
    padding: 1.5rem;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 8px;
}

.work-with-item h3 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-heading);
    margin-bottom: 0.5rem;
}

.work-with-item p {
    font-size: 0.92rem;
    color: var(--text-muted);
    margin-bottom: 0;
    line-height: 1.6;
}

/* ── Engagements ── */
.engagements {
    margin-top: 1.5rem;
}

.engagement-tag {
    display: inline-block;
    padding: 0.4rem 1rem;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 20px;
    font-size: 0.88rem;
    color: var(--text-muted);
    margin: 0.25rem 0.25rem;
}

/* ── Contact ── */
.contact {
    padding: 5rem 2rem;
    text-align: center;
    background: var(--bg-secondary);
}

.contact-inner {
    max-width: 600px;
    margin: 0 auto;
}

.contact-title {
    font-size: 1.6rem;
    font-weight: 600;
    color: var(--text-heading);
    margin-bottom: 1rem;
}

.contact-text {
    font-size: 1.05rem;
    color: var(--text-primary);
    margin-bottom: 2rem;
}

.contact-links {
    display: flex;
    justify-content: center;
    gap: 2rem;
    flex-wrap: wrap;
}

.contact-link {
    color: var(--text-heading);
    text-decoration: none;
    font-size: 1rem;
    font-weight: 500;
    padding: 0.6rem 1.5rem;
    border: 1px solid var(--border);
    border-radius: 6px;
    transition: border-color 0.2s, background 0.2s;
}

.contact-link:hover {
    border-color: var(--accent);
    background: var(--bg-card);
}

/* ── Footer ── */
.footer {
    padding: 2rem;
    text-align: center;
    font-size: 0.85rem;
    color: var(--text-muted);
}

/* ── Series promo card (homepage) ── */
.series-promo {
    max-width: 800px;
    margin: 0 auto;
    padding: 3rem 2rem;
}

.series-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 2.5rem;
    display: block;
    text-decoration: none;
    transition: border-color 0.2s, background 0.2s;
}

.series-card:hover {
    border-color: var(--accent);
    background: var(--bg-secondary);
}

.series-card-label {
    font-size: 0.82rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--text-muted);
    margin-bottom: 0.75rem;
}

.series-card-title {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-heading);
    margin-bottom: 0.75rem;
    line-height: 1.3;
}

.series-card-desc {
    font-size: 1rem;
    color: var(--text-primary);
    line-height: 1.6;
}


/* ═══════════════════════════════════════════════════
   Article / Series pages
   ═══════════════════════════════════════════════════ */

/* ── Site nav ── */
.site-nav {
    padding: 1.5rem 2rem;
    max-width: 800px;
    margin: 0 auto;
}

.site-nav a {
    font-size: 0.88rem;
    font-weight: 500;
    color: var(--text-muted);
    text-decoration: none;
    transition: color 0.2s;
}

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

.nav-sep {
    color: var(--text-muted);
    margin: 0 0.5rem;
    opacity: 0.5;
}

/* ── Article header ── */
.article-header {
    max-width: 800px;
    margin: 0 auto;
    padding: 2rem 2rem 0;
}

.article-header-graphic {
    width: 100%;
    margin-bottom: 2.5rem;
    border-radius: 6px;
    overflow: hidden;
}

.article-header-graphic:has(svg) {
    height: 120px;
}

.article-header-graphic svg,
.article-header-graphic img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.article-series-label {
    font-size: 0.82rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--text-muted);
    margin-bottom: 0.75rem;
}

.article-number {
    font-size: 0.88rem;
    color: var(--text-muted);
    margin-bottom: 0.5rem;
}

.article-title {
    font-size: 2.4rem;
    font-weight: 700;
    color: var(--text-heading);
    line-height: 1.2;
    margin-bottom: 1rem;
}

.article-author {
    font-size: 0.95rem;
    color: var(--text-muted);
    margin-bottom: 0.5rem;
}

/* ── Article body ── */
.article-body {
    max-width: 800px;
    margin: 0 auto;
    padding: 2.5rem 2rem 4rem;
}

.article-body p {
    font-size: 1.08rem;
    line-height: 1.8;
    margin-bottom: 1.5rem;
}

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

.article-body a {
    color: var(--link);
    text-decoration: underline;
    text-underline-offset: 2px;
}

.article-body a:hover {
    color: var(--link-hover);
}

/* ── Article inline images (quotes, illustrations) ── */
.article-image {
    margin: 2.5rem auto;
    text-align: center;
}

.article-image img {
    max-width: 100%;
    height: auto;
    border-radius: 6px;
}

.article-image.quote-image img {
    max-width: 520px;
    border: 1px solid var(--border);
}

.article-image.illustration img {
    max-width: 640px;
}

.article-image figcaption {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-top: 0.75rem;
    font-style: italic;
}

/* ── Inline SVG diagram (hub/spoke) ── */
.article-diagram {
    margin: 2.5rem auto;
    text-align: center;
}

.article-diagram svg {
    max-width: 100%;
    height: auto;
}

.article-diagram figcaption {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-top: 0.75rem;
    font-style: italic;
}

/* ── Article footer nav ── */
.article-nav {
    max-width: 800px;
    margin: 0 auto;
    padding: 0 2rem 4rem;
    display: flex;
    justify-content: space-between;
    gap: 1rem;
}

.article-nav a {
    display: block;
    padding: 1.25rem 1.5rem;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 8px;
    text-decoration: none;
    transition: border-color 0.2s, background 0.2s;
    max-width: 48%;
}

.article-nav a:hover {
    border-color: var(--accent);
    background: var(--bg-secondary);
}

.article-nav-label {
    font-size: 0.78rem;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--text-muted);
    margin-bottom: 0.3rem;
}

.article-nav-title {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-heading);
    line-height: 1.3;
}

.article-nav .next {
    text-align: right;
    margin-left: auto;
}

/* ═══════════════════════════════════════════════════
   Series landing page
   ═══════════════════════════════════════════════════ */

.series-header {
    max-width: 800px;
    margin: 0 auto;
    padding: 3rem 2rem 1rem;
}

.series-title {
    font-size: 2.4rem;
    font-weight: 700;
    color: var(--text-heading);
    line-height: 1.2;
    margin-bottom: 0.75rem;
}

.series-subtitle {
    font-size: 1.15rem;
    color: var(--text-primary);
    line-height: 1.7;
    max-width: 640px;
}

.series-author {
    font-size: 0.95rem;
    color: var(--text-muted);
    margin-top: 1rem;
}

.series-toc {
    max-width: 800px;
    margin: 0 auto;
    padding: 2rem 2rem 4rem;
}

.toc-item {
    display: block;
    padding: 1.75rem 2rem;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 8px;
    text-decoration: none;
    transition: border-color 0.2s, background 0.2s;
    margin-bottom: 1rem;
}

.toc-item:hover {
    border-color: var(--accent);
    background: var(--bg-secondary);
}

.toc-item-number {
    font-size: 0.78rem;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--text-muted);
    margin-bottom: 0.35rem;
}

.toc-item-title {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--text-heading);
    margin-bottom: 0.35rem;
    line-height: 1.3;
}

.toc-item-desc {
    font-size: 0.92rem;
    color: var(--text-muted);
    line-height: 1.5;
}

.toc-coming-soon {
    cursor: default;
    opacity: 0.45;
}

.toc-coming-soon:hover {
    border-color: var(--border);
    background: var(--bg-card);
}

.toc-epilogue {
    margin-top: 2rem;
    padding-top: 2rem;
    border-top: 1px solid var(--border);
}


/* ═══════════════════════════════════════════════════
   Testimonials page
   ═══════════════════════════════════════════════════ */

.testimonials-header {
    max-width: 800px;
    margin: 0 auto;
    padding: 3rem 2rem 1rem;
}

.testimonials-title {
    font-size: 2.4rem;
    font-weight: 700;
    color: var(--text-heading);
    line-height: 1.2;
    margin-bottom: 1rem;
}

.testimonials-subtitle {
    font-size: 1.08rem;
    color: var(--text-primary);
    line-height: 1.7;
    max-width: 680px;
    margin-bottom: 1rem;
}

.testimonial-section {
    max-width: 800px;
    margin: 0 auto;
    padding: 3.5rem 2rem;
}

.testimonial-section .section-title {
    margin-bottom: 2rem;
}

.testimonial-card {
    padding: 1.75rem 2rem;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 8px;
    margin-bottom: 1.25rem;
}

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

.testimonial-quote p {
    font-size: 1.02rem;
    line-height: 1.7;
    color: var(--text-primary);
    font-style: italic;
    margin-bottom: 1.1rem;
}

.testimonial-attribution {
    font-size: 0.92rem;
    line-height: 1.5;
    color: var(--text-muted);
    font-style: normal;
}

.testimonial-name {
    display: block;
    color: var(--text-heading);
    font-weight: 600;
    font-size: 0.98rem;
}

.testimonial-role {
    display: block;
    font-size: 0.88rem;
    margin-top: 0.15rem;
}


/* ═══════════════════════════════════════════════════
   Homepage testimonial rotator
   ═══════════════════════════════════════════════════ */

.testimonial-rotator {
    max-width: 800px;
    margin: 0 auto;
    padding: 4rem 2rem;
}

.testimonial-rotator-track {
    display: grid;
}

.testimonial-rotator-item {
    grid-column: 1;
    grid-row: 1;
    opacity: 0;
    transition: opacity 0.8s ease-in-out;
    pointer-events: none;
    margin: 0;
}

.testimonial-rotator-item.active {
    opacity: 1;
    pointer-events: auto;
}

.testimonial-rotator-quote p {
    font-size: 1.2rem;
    line-height: 1.6;
    color: var(--text-primary);
    font-style: italic;
    text-align: center;
    margin-bottom: 1.1rem;
    max-width: 680px;
    margin-left: auto;
    margin-right: auto;
}

.testimonial-rotator-attribution {
    font-size: 0.9rem;
    color: var(--text-muted);
    text-align: center;
    font-style: normal;
}

.testimonial-rotator-link {
    margin-top: 2rem;
    text-align: center;
    font-size: 0.88rem;
}

.testimonial-rotator-link a {
    color: var(--text-muted);
    text-decoration: none;
    transition: color 0.2s;
}

.testimonial-rotator-link a:hover {
    color: var(--text-heading);
}

@media (prefers-reduced-motion: reduce) {
    .testimonial-rotator-item {
        transition: none;
    }
}


/* ═══════════════════════════════════════════════════
   Responsive
   ═══════════════════════════════════════════════════ */

@media (max-width: 768px) {
    .hero-title {
        font-size: 2.2rem;
    }
    .hero-subtitle {
        font-size: 1.3rem;
    }
    .hero-tagline {
        font-size: 1.05rem;
    }
    .work-with-grid {
        grid-template-columns: 1fr;
    }
    .hero-bg {
        width: 400px;
        height: 400px;
        right: -20%;
    }
    .section-title {
        font-size: 1.35rem;
    }
    .article-title, .series-title, .testimonials-title {
        font-size: 1.8rem;
    }
    .article-header-graphic {
        height: 80px;
    }
    .article-nav {
        flex-direction: column;
    }
    .article-nav a {
        max-width: 100%;
    }
    .article-nav .next {
        text-align: left;
    }
    .testimonial-card {
        padding: 1.5rem 1.5rem;
    }
    .testimonial-rotator-quote p {
        font-size: 1.05rem;
    }
    .testimonial-rotator {
        padding: 3rem 1.5rem;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 1.8rem;
    }
    .hero-subtitle {
        font-size: 1.1rem;
    }
    .contact-links {
        flex-direction: column;
        align-items: center;
    }
    .article-title, .series-title, .testimonials-title {
        font-size: 1.5rem;
    }
    .article-body p {
        font-size: 1rem;
    }
    .testimonial-quote p {
        font-size: 0.98rem;
    }
}