:root {
    --primary: #0056b3;
    --primary-dark: #003a7a;
    --ink: #1a1a1a;
    --muted: #555;
    --bg: #f4f7f6;
    --card: #ffffff;
    --border: #e5e8ec;
    --accent: #ff8a00;
    --font: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

* { box-sizing: border-box; }

body {
    font-family: var(--font);
    line-height: 1.65;
    color: var(--ink);
    margin: 0;
    background: var(--bg);
}

a { color: var(--primary); }
a:hover { text-decoration: underline; }

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

header.site-header {
    background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 100%);
    color: #fff;
    padding: 4rem 1.5rem;
    text-align: center;
}
header.site-header .eyebrow {
    text-transform: uppercase;
    letter-spacing: 2px;
    font-size: 0.78rem;
    opacity: 0.85;
    margin: 0 0 0.5rem;
}
header.site-header h1 { margin: 0; font-size: 2.8rem; letter-spacing: -0.5px; }
header.site-header p.tagline {
    margin: 14px auto 0;
    font-size: 1.15rem;
    opacity: 0.92;
    max-width: 640px;
}
header.site-header .breadcrumb {
    margin-top: 1.2rem;
    font-size: 0.85rem;
    opacity: 0.85;
}
header.site-header .breadcrumb a { color: #fff; text-decoration: underline; }

/* ---------- Layout ---------- */

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 3rem 1.5rem;
}
.container.narrow { max-width: 820px; }

/* ---------- Phase sections (index page) ---------- */

.phase {
    margin-bottom: 3rem;
}
.phase-header {
    border-bottom: 2px solid var(--border);
    margin-bottom: 1.5rem;
    padding-bottom: 0.6rem;
}
.phase-header h2 {
    margin: 0;
    color: var(--primary);
    font-size: 1.5rem;
    letter-spacing: -0.2px;
}
.phase-header .phase-tag {
    display: inline-block;
    background: var(--primary);
    color: #fff;
    padding: 2px 10px;
    border-radius: 12px;
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 1px;
    margin-right: 0.6rem;
    vertical-align: 2px;
}
.phase-header .phase-meta {
    color: var(--muted);
    font-size: 0.9rem;
    margin: 0.3rem 0 0;
}

.episode-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: 14px;
}

.episode-card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 10px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.04);
    padding: 1rem 1.1rem;
    text-decoration: none;
    color: inherit;
    display: flex;
    gap: 12px;
    align-items: flex-start;
    transition: transform 0.18s ease, box-shadow 0.18s ease, border-color 0.18s ease;
}
.episode-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 18px rgba(0,0,0,0.08);
    border-color: var(--primary);
    text-decoration: none;
}
.episode-card .week-num {
    flex-shrink: 0;
    background: var(--primary);
    color: #fff;
    font-weight: 700;
    font-size: 0.85rem;
    border-radius: 8px;
    padding: 6px 8px;
    min-width: 44px;
    text-align: center;
    letter-spacing: 0.5px;
}
.episode-card .episode-title {
    margin: 0 0 0.15rem;
    font-size: 1rem;
    font-weight: 700;
    color: var(--ink);
    line-height: 1.3;
}
.episode-card .episode-subtitle {
    margin: 0;
    font-size: 0.85rem;
    color: var(--muted);
    line-height: 1.35;
}

/* ---------- Episode page ---------- */

.episode-eyebrow {
    text-transform: uppercase;
    letter-spacing: 2px;
    font-size: 0.78rem;
    color: rgba(255,255,255,0.85);
    margin: 0 0 0.5rem;
}

.media-block {
    background: var(--card);
    border: 1px dashed var(--border);
    border-radius: 12px;
    padding: 2.5rem 1.5rem;
    text-align: center;
    color: var(--muted);
    margin-bottom: 2rem;
}
.media-block h3 {
    margin: 0 0 0.5rem;
    color: var(--primary);
    font-size: 1.05rem;
}
.media-block p { margin: 0; font-size: 0.95rem; }

.content-block {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 2rem;
    box-shadow: 0 2px 10px rgba(0,0,0,0.04);
    margin-bottom: 2rem;
}
.content-block h2 {
    color: var(--primary);
    margin-top: 1.6rem;
    padding-bottom: 0.4rem;
    border-bottom: 1px solid var(--border);
}
.content-block h2:first-child { margin-top: 0; }
.content-block p { color: #333; }
.content-block ul { padding-left: 1.4rem; }
.content-block li { margin: 0.3rem 0; }
.content-block .coming-soon {
    color: var(--muted);
    font-style: italic;
}

/* ---------- Episode nav ---------- */

.episode-nav {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: 12px;
    margin-bottom: 2rem;
}
.episode-nav a, .episode-nav span {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 0.9rem 1rem;
    text-decoration: none;
    color: var(--ink);
    font-size: 0.9rem;
    transition: border-color 0.18s ease, transform 0.18s ease;
    display: flex;
    flex-direction: column;
    gap: 2px;
    min-height: 64px;
}
.episode-nav a:hover {
    border-color: var(--primary);
    transform: translateY(-1px);
    text-decoration: none;
}
.episode-nav .nav-prev { text-align: left; }
.episode-nav .nav-index { text-align: center; align-items: center; justify-content: center; }
.episode-nav .nav-next { text-align: right; align-items: flex-end; }
.episode-nav .nav-label {
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    color: var(--muted);
    font-weight: 700;
}
.episode-nav .nav-title {
    font-weight: 600;
    color: var(--ink);
    line-height: 1.25;
}
.episode-nav .placeholder {
    color: var(--border);
    border-style: dashed;
    cursor: default;
}

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

footer.site-footer {
    background: #1a1a1a;
    color: #bbb;
    text-align: center;
    padding: 2.5rem 1.5rem;
    font-size: 0.9rem;
}
footer.site-footer a {
    color: #fff;
    text-decoration: none;
    margin: 0 0.6rem;
}
footer.site-footer a:hover { text-decoration: underline; }

/* ---------- Hero image (episode body) ---------- */

.hero-image {
    position: relative;
    border-radius: 12px;
    overflow: hidden;
    margin-bottom: 2rem;
    box-shadow: 0 8px 24px rgba(0,0,0,0.12);
    aspect-ratio: 16 / 9;
    background: #1a1a1a;
}
.hero-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}
.hero-image .caption {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 1.5rem 1.5rem 1rem;
    background: linear-gradient(180deg, rgba(0,0,0,0) 0%, rgba(0,0,0,0.7) 100%);
    color: #fff;
    font-size: 1.05rem;
    font-weight: 500;
    line-height: 1.4;
}
.hero-image .credit {
    position: absolute;
    top: 8px;
    right: 10px;
    background: rgba(0,0,0,0.55);
    color: #fff;
    font-size: 0.7rem;
    padding: 3px 8px;
    border-radius: 4px;
    text-decoration: none;
    letter-spacing: 0.3px;
}

.lede {
    font-size: 1.15rem;
    line-height: 1.7;
    color: #2a2a2a;
}
.lede p:first-child::first-letter {
    initial-letter: 2;
    -webkit-initial-letter: 2;
    font-weight: 800;
    color: var(--primary);
    margin-right: 0.3rem;
}

/* ---------- Trinity grid (CPU / RAM / Storage cards) ---------- */

.trinity-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
    margin: 2rem 0;
}
.trinity-card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
    display: flex;
    flex-direction: column;
}
.trinity-card .photo {
    width: 100%;
    height: 160px;
    object-fit: cover;
    display: block;
    background: #eee;
}
.trinity-card .body {
    padding: 1.1rem 1.2rem 1.3rem;
    flex-grow: 1;
    display: flex;
    flex-direction: column;
}
.trinity-card .role {
    font-size: 0.72rem;
    text-transform: uppercase;
    letter-spacing: 2px;
    color: var(--accent);
    font-weight: 700;
    margin: 0 0 0.3rem;
}
.trinity-card h3 {
    margin: 0 0 0.6rem;
    font-size: 1.4rem;
    color: var(--primary);
    letter-spacing: -0.3px;
}
.trinity-card .pitch {
    margin: 0 0 1rem;
    color: #333;
    font-size: 0.95rem;
    line-height: 1.5;
}
.trinity-card .specs {
    margin: auto 0 0;
    padding-top: 0.8rem;
    border-top: 1px dashed var(--border);
    list-style: none;
    padding-left: 0;
}
.trinity-card .specs li {
    font-size: 0.82rem;
    color: var(--muted);
    margin: 0.25rem 0;
    display: flex;
    justify-content: space-between;
    gap: 8px;
}
.trinity-card .specs strong {
    color: var(--ink);
    font-weight: 700;
}

/* ---------- Latency chart (animated bars) ---------- */

.latency-chart {
    margin: 1.5rem 0 1rem;
}
.latency-row {
    display: grid;
    grid-template-columns: 110px 1fr 110px;
    align-items: center;
    gap: 12px;
    margin: 0.5rem 0;
    font-size: 0.9rem;
}
.latency-row .label {
    text-align: right;
    color: var(--ink);
    font-weight: 600;
}
.latency-row .bar-track {
    background: #eef2f6;
    border-radius: 6px;
    overflow: hidden;
    height: 24px;
    position: relative;
}
.latency-row .bar {
    height: 100%;
    background: linear-gradient(90deg, var(--primary) 0%, var(--accent) 100%);
    border-radius: 6px;
    transform: scaleX(0);
    transform-origin: left center;
    animation: bar-grow 1.4s cubic-bezier(0.22, 1, 0.36, 1) forwards;
}
.latency-row .bar.delayed-1 { animation-delay: 0.05s; }
.latency-row .bar.delayed-2 { animation-delay: 0.10s; }
.latency-row .bar.delayed-3 { animation-delay: 0.15s; }
.latency-row .bar.delayed-4 { animation-delay: 0.20s; }
.latency-row .bar.delayed-5 { animation-delay: 0.25s; }
.latency-row .bar.delayed-6 { animation-delay: 0.30s; }
.latency-row .ns {
    text-align: left;
    color: var(--muted);
    font-variant-numeric: tabular-nums;
    font-size: 0.85rem;
}

@keyframes bar-grow {
    from { transform: scaleX(0); }
    to   { transform: scaleX(var(--w, 1)); }
}

.scale-callout {
    background: linear-gradient(135deg, #fff8ee 0%, #ffeed4 100%);
    border: 1px solid #f0d9a8;
    border-radius: 10px;
    padding: 1.2rem 1.4rem;
    margin: 1.5rem 0;
}
.scale-callout h4 {
    margin: 0 0 0.6rem;
    color: #8a4d00;
    font-size: 0.95rem;
    letter-spacing: 0.3px;
}
.scale-callout ul {
    margin: 0;
    padding-left: 1.2rem;
}
.scale-callout li {
    margin: 0.3rem 0;
    color: #4d3300;
    font-size: 0.95rem;
}
.scale-callout li strong { color: #8a4d00; }

/* ---------- Recipe / numbered step list ---------- */

.recipe {
    list-style: none;
    counter-reset: step;
    padding: 0;
    margin: 1.5rem 0;
}
.recipe li {
    counter-increment: step;
    position: relative;
    padding: 0.9rem 1rem 0.9rem 4rem;
    margin: 0.6rem 0;
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 10px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.03);
}
.recipe li::before {
    content: counter(step);
    position: absolute;
    top: 0.85rem;
    left: 0.85rem;
    width: 2.2rem;
    height: 2.2rem;
    background: var(--primary);
    color: #fff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1rem;
}
.recipe li strong { color: var(--primary); }

/* ---------- Inline photo block ---------- */

.figure {
    margin: 2rem 0;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 4px 14px rgba(0,0,0,0.08);
    position: relative;
}
.figure img { width: 100%; height: auto; display: block; }
.figure .caption {
    background: var(--card);
    padding: 0.85rem 1.1rem;
    color: var(--muted);
    font-size: 0.9rem;
    border-top: 1px solid var(--border);
    line-height: 1.45;
}
.figure .credit {
    position: absolute;
    top: 8px;
    right: 10px;
    background: rgba(0,0,0,0.55);
    color: #fff;
    font-size: 0.7rem;
    padding: 3px 8px;
    border-radius: 4px;
    text-decoration: none;
    letter-spacing: 0.3px;
}

/* ---------- Pull quote ---------- */

.pullquote {
    border-left: 4px solid var(--accent);
    margin: 2rem 0;
    padding: 0.4rem 0 0.4rem 1.5rem;
    font-size: 1.2rem;
    line-height: 1.5;
    color: #2a2a2a;
    font-style: italic;
}

/* ---------- Try-it block ---------- */

.try-it {
    background: #f0f7ff;
    border: 1px solid #cfe3ff;
    border-radius: 12px;
    padding: 1.5rem;
    margin: 2rem 0;
}
.try-it h3 {
    margin: 0 0 0.6rem;
    color: var(--primary);
    font-size: 1.1rem;
}
.try-it ul { padding-left: 1.3rem; margin: 0.5rem 0; }
.try-it li { margin: 0.4rem 0; }
.try-it kbd {
    background: #fff;
    border: 1px solid #b0c8e6;
    border-bottom-width: 2px;
    border-radius: 4px;
    padding: 1px 6px;
    font-size: 0.82rem;
    font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
    color: var(--ink);
}

/* ---------- Attribution ---------- */

.attribution {
    margin-top: 2rem;
    padding-top: 1rem;
    border-top: 1px solid var(--border);
    font-size: 0.82rem;
    color: var(--muted);
}
.attribution h4 { margin: 0 0 0.3rem; font-size: 0.78rem; text-transform: uppercase; letter-spacing: 1.5px; color: var(--muted); }
.attribution a { color: var(--muted); text-decoration: underline; }

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

@media (max-width: 700px) {
    header.site-header h1 { font-size: 2rem; }
    header.site-header p.tagline { font-size: 1rem; }
    .episode-nav { grid-template-columns: 1fr; }
    .episode-nav .nav-next, .episode-nav .nav-prev, .episode-nav .nav-index {
        text-align: left;
        align-items: flex-start;
    }
    .content-block { padding: 1.4rem; }
    .trinity-grid { grid-template-columns: 1fr; }
    .latency-row { grid-template-columns: 90px 1fr 90px; font-size: 0.8rem; }
    .latency-row .label { font-size: 0.85rem; }
    .latency-row .ns { font-size: 0.75rem; }
    .recipe li { padding-left: 3.4rem; }
    .recipe li::before { width: 1.8rem; height: 1.8rem; font-size: 0.85rem; top: 1rem; left: 0.7rem; }
    .hero-image .caption { font-size: 0.92rem; padding: 1rem 1rem 0.8rem; }
}