/* Cogent Networks - diagram system (D1 tri-column, D2 swimlane, D3 rail, D4 charts, D6 mini-hub) */

/* ---- shared page furniture ---- */
.cn-wrap { max-width: 1320px; margin: 0 auto; padding: 0 44px; }
.cn-section { padding: 84px 0; border-bottom: 1px solid var(--line); }
.cn-section.alt { background: var(--bg-alt); }
.cn-eyebrow { font-family: 'JetBrains Mono', monospace; font-size: 10.5px; letter-spacing: 0.14em; text-transform: uppercase; color: var(--accent-text, var(--accent)); margin-bottom: 16px; }
.cn-h2 { margin: 0 0 16px; font-size: 40px; line-height: 1.1; letter-spacing: -0.03em; font-weight: 700; color: var(--text); }
.cn-h3 { margin: 0 0 10px; font-size: 21px; font-weight: 600; letter-spacing: -0.02em; color: var(--text); }
.cn-lead { margin: 0 0 16px; font-size: 17px; line-height: 1.66; color: var(--body); }
.cn-p { margin: 0 0 14px; font-size: 15.5px; line-height: 1.72; color: var(--body); }
.cn-card { background: var(--surface); border: 1px solid var(--line); border-radius: 12px; padding: 26px 24px 28px; }
.cn-card-top { border-top: 3px solid var(--accent); }
.cn-grid2 { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.cn-grid3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.cn-grid4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.cn-split { display: grid; grid-template-columns: 0.85fr 1.15fr; gap: 52px; align-items: start; }
.cn-mono { font-family: 'JetBrains Mono', monospace; }
.cn-chip { display: inline-flex; align-items: center; gap: 8px; font-family: 'JetBrains Mono', monospace; font-size: 11px; letter-spacing: 0.08em; color: var(--text); border: 1px solid var(--badge-border); background: var(--badge-bg); padding: 7px 13px; border-radius: 100px; }
[data-cn-theme] a.cn-btn { color: var(--on-accent); }
[data-cn-theme] a.cn-btn-ghost { color: var(--text); }
.cn-btn { display: inline-flex; align-items: center; background: var(--accent-btn, var(--accent)); color: var(--on-accent); font-size: 15px; font-weight: 600; padding: 15px 26px; border-radius: 7px; }
.cn-btn:hover { background: var(--text); color: var(--bg); }
.cn-btn-ghost { display: inline-flex; align-items: center; color: var(--text); font-size: 15px; font-weight: 600; padding: 15px 24px; border-radius: 7px; border: 1px solid var(--badge-border); }
.cn-btn-ghost:hover { border-color: var(--accent); color: var(--text); }
/* Photo tile. The dashed affordance belongs to the EMPTY state only - once a real photo is
   in place the tile gets a plain hairline, otherwise every supplied image reads as "not yet
   filled". :has() carries this, with a .cn-photo--filled class as the explicit fallback. */
.cn-photo { position: relative; border-radius: 12px; overflow: hidden; border: 1px solid var(--line); background: var(--surface-2); aspect-ratio: 16 / 9; display: flex; align-items: center; justify-content: center; }
.cn-photo:not(:has(img)) { border-style: dashed; border-color: var(--badge-border); }
/* Portrait assets cannot survive a 16:9 cover crop - a tall figure keeps its full height and
   is contained rather than cropped, so annotated diagrams stay legible. */
.cn-photo.cn-photo--tall { aspect-ratio: 3 / 4; background: var(--surface); }
.cn-photo.cn-photo--tall img { object-fit: contain; }
.cn-photo.cn-photo--figure { aspect-ratio: auto; background: var(--surface); }
.cn-photo.cn-photo--figure img { height: auto; object-fit: contain; }
.cn-photo-label { font-family: 'JetBrains Mono', monospace; font-size: 10px; letter-spacing: 0.12em; color: var(--body); text-align: center; padding: 0 20px; }
.cn-photo img { width: 100%; height: 100%; object-fit: cover; display: block; }
.cn-photo-cap { position: absolute; left: 0; bottom: 0; padding: 9px 14px; background: var(--overlay-photo); color: #FFFFFF; font-family: 'JetBrains Mono', monospace; font-size: 9px; letter-spacing: 0.1em; }
.cn-breadcrumb { display: flex; align-items: center; gap: 10px; font-family: 'JetBrains Mono', monospace; font-size: 10.5px; letter-spacing: 0.12em; color: var(--muted); margin-bottom: 26px; flex-wrap: wrap; }
.cn-breadcrumb a { color: var(--muted); }
.cn-breadcrumb a:hover { color: var(--accent); }
.cn-kpi { background: var(--surface); border: 1px solid var(--line); border-radius: 10px; padding: 20px; }
.cn-kpi-fig { font-family: 'JetBrains Mono', monospace; font-size: 26px; font-weight: 700; color: var(--text); line-height: 1; }
.cn-kpi-lbl { margin-top: 8px; font-size: 12.5px; color: var(--body); line-height: 1.45; }
.cn-table { width: 100%; border-collapse: collapse; background: var(--surface); border: 1px solid var(--line); border-radius: 12px; overflow: hidden; }
.cn-table th { text-align: left; font-family: 'JetBrains Mono', monospace; font-size: 9.5px; letter-spacing: 0.1em; color: var(--body); font-weight: 600; padding: 12px 18px; background: var(--surface-2); border-bottom: 1px solid var(--line); }
.cn-table td { font-size: 13.5px; color: var(--body); padding: 15px 18px; border-bottom: 1px solid var(--line-soft); }
.cn-table tr:last-child td { border-bottom: none; }
.cn-table td strong { color: var(--text); font-weight: 600; }
.cn-faq { border-top: 1px solid var(--line); }
.cn-faq details { border-bottom: 1px solid var(--line); }
.cn-faq summary { cursor: pointer; list-style: none; padding: 20px 0; font-size: 16.5px; font-weight: 600; color: var(--text); display: flex; align-items: center; justify-content: space-between; gap: 20px; }
.cn-faq summary::-webkit-details-marker { display: none; }
.cn-faq summary::after { content: '+'; color: var(--accent); font-size: 20px; font-weight: 400; flex-shrink: 0; }
.cn-faq details[open] summary::after { content: '\2212'; }
.cn-faq p { margin: 0 0 22px; font-size: 15px; line-height: 1.72; color: var(--body); max-width: 900px; }

/* ---- D1 tri-column service lifecycle ---- */
.d1 { display: grid; grid-template-columns: 1fr 1.28fr 1fr; gap: 18px; align-items: stretch; }
.d1-col { background: var(--surface); border: 1px solid var(--line); border-radius: 12px; overflow: hidden; display: flex; flex-direction: column; }
.d1-head { padding: 18px 22px; background: var(--bg-deep); }
.d1-head-k { font-family: 'JetBrains Mono', monospace; font-size: 9.5px; letter-spacing: 0.14em; color: var(--accent); margin-bottom: 6px; }
.d1-head-t { font-size: 16px; font-weight: 600; color: #FFFFFF; line-height: 1.3; }
[data-cn-theme="light"] .d1-head { background: #0A2540; }
[data-cn-theme="light"] .d1-head-k { color: #7FE3D6; }
.d1-body { padding: 20px 22px 24px; display: flex; flex-direction: column; gap: 16px; flex: 1; }
.d1-step { display: grid; grid-template-columns: 26px 1fr; gap: 12px; }
.d1-num { font-family: 'JetBrains Mono', monospace; font-size: 10.5px; font-weight: 700; color: var(--accent); padding-top: 2px; }
.d1-step-t { font-size: 14.5px; font-weight: 600; color: var(--text); margin-bottom: 6px; }
.d1-step-l { font-size: 12.5px; line-height: 1.6; color: var(--body); }
.d1-tools { display: flex; flex-wrap: wrap; gap: 7px; }
.d1-tool { font-family: 'JetBrains Mono', monospace; font-size: 10px; letter-spacing: 0.06em; padding: 6px 10px; border-radius: 5px; background: rgba(var(--accent-rgb), 0.10); color: var(--accent); border: 1px solid rgba(var(--accent-rgb), 0.22); }
.d1-mock { border: 1px solid var(--line); border-radius: 10px; overflow: hidden; background: var(--bg-alt); transform: perspective(900px) rotateX(3deg); box-shadow: 0 18px 40px rgba(0,0,0,0.18); }
.d1-mock-bar { display: flex; align-items: center; gap: 10px; padding: 9px 12px; background: var(--surface-2); border-bottom: 1px solid var(--line); }
.d1-mock-bar span { font-family: 'JetBrains Mono', monospace; font-size: 9px; letter-spacing: 0.08em; color: var(--body); }
.d1-mock-live { display: inline-flex; align-items: center; gap: 5px; color: var(--body) !important; }
.d1-mock-live i { width: 5px; height: 5px; border-radius: 50%; background: var(--live); animation: cnLive 2.6s ease-in-out infinite; display: block; }
.d1-mock-row { display: grid; gap: 0 10px; align-items: center; padding: 9px 12px; border-bottom: 1px solid var(--line-soft); font-size: 11.5px; color: var(--body); }
.d1-mock-row:last-child { border-bottom: none; }
.d1-mock-row b { font-family: 'JetBrains Mono', monospace; font-size: 10px; font-weight: 600; color: var(--text); }
.d1-mock-row em { font-style: normal; font-family: 'JetBrains Mono', monospace; font-size: 9.5px; color: var(--body); text-align: right; }
.d1-mock-head { font-family: 'JetBrains Mono', monospace; font-size: 8.5px; letter-spacing: 0.1em; color: var(--body); }
.d1-stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px; background: var(--line); border: 1px solid var(--line); border-radius: 12px; overflow: hidden; margin-top: 18px; }
.d1-stat { background: var(--surface); padding: 22px 20px; }
.d1-stat-fig { font-family: 'JetBrains Mono', monospace; font-size: 28px; font-weight: 700; color: var(--text); line-height: 1; letter-spacing: -0.02em; }
.d1-stat-lbl { margin-top: 9px; font-size: 12.5px; line-height: 1.45; color: var(--body); }

/* ---- D2 swimlane ---- */
.d2 { border: 1px solid var(--line); border-radius: 12px; background: var(--surface); overflow: hidden; }
.d2-lane { display: grid; grid-template-columns: 168px 1fr; border-bottom: 1px solid var(--line); }
.d2-lane:last-child { border-bottom: none; }
.d2-lane-lbl { padding: 22px 18px; background: var(--surface-2); border-right: 1px solid var(--line); font-family: 'JetBrains Mono', monospace; font-size: 9.5px; letter-spacing: 0.1em; color: var(--muted); display: flex; align-items: center; }
.d2-nodes { position: relative; display: grid; grid-auto-flow: column; grid-auto-columns: 1fr; gap: 14px; padding: 18px 20px; }
.d2-node { border: 1px solid var(--line); border-radius: 8px; padding: 13px 14px; background: var(--bg-alt); position: relative; }
.d2-node-k { font-family: 'JetBrains Mono', monospace; font-size: 9px; letter-spacing: 0.08em; color: var(--accent); margin-bottom: 7px; }
.d2-node-t { font-size: 13px; font-weight: 600; color: var(--text); margin-bottom: 5px; line-height: 1.3; }
.d2-node-d { font-size: 11.5px; line-height: 1.55; color: var(--body); }
.d2-node.empty { border-style: dashed; opacity: 0.4; }
.d2-pulse { position: absolute; top: 0; bottom: 0; width: 22%; pointer-events: none; background: linear-gradient(90deg, rgba(var(--accent-rgb),0), rgba(var(--accent-rgb),0.14), rgba(var(--accent-rgb),0)); animation: cnFlow 6s linear infinite; }
@keyframes cnFlow { 0% { transform: translateX(-30%); } 100% { transform: translateX(460%); } }

/* ---- D3 technical rail ---- */
.d3 { position: relative; display: flex; flex-direction: column; gap: 34px; }
.d3-row { position: relative; }
.d3-track { position: absolute; left: 0; right: 0; top: 19px; height: 2px; background: var(--line); }
.d3-track i { display: block; height: 100%; width: 0; background: var(--accent); transition: width 1.6s cubic-bezier(.22,1,.36,1); }
.d3.in .d3-track i, .d3-row.in .d3-track i { width: 100%; }
.d3-nodes { position: relative; display: grid; gap: 14px; }
.d3-node { text-align: left; }
.d3-dot { width: 38px; height: 38px; border-radius: 50%; border: 1px solid var(--line); background: var(--surface); display: flex; align-items: center; justify-content: center; font-family: 'JetBrains Mono', monospace; font-size: 11px; font-weight: 700; color: var(--muted); margin-bottom: 14px; position: relative; z-index: 2; transition: color .3s ease, border-color .3s ease, background .3s ease; }
.d3-node:hover .d3-dot, .d3-node.on .d3-dot { color: var(--on-accent); background: var(--accent); border-color: var(--accent); }
.d3-node-t { font-size: 13.5px; font-weight: 600; color: var(--text); margin-bottom: 6px; line-height: 1.35; }
.d3-node-d { font-size: 11.5px; line-height: 1.55; color: var(--body); }

/* ---- D4 charts ---- */
.d4-band { display: grid; gap: 18px; }
.d4-card { background: var(--surface); border: 1px solid var(--line); border-radius: 12px; padding: 24px 24px 26px; }
.d4-title { font-family: 'JetBrains Mono', monospace; font-size: 9.5px; letter-spacing: 0.12em; color: var(--muted); margin-bottom: 18px; }
.d4-bar-row { display: grid; grid-template-columns: 118px 1fr 62px; gap: 12px; align-items: center; margin-bottom: 12px; font-size: 12.5px; color: var(--body); }
.d4-bar-row:last-child { margin-bottom: 0; }
.d4-bar { height: 8px; border-radius: 4px; background: var(--line); overflow: hidden; }
.d4-bar i { display: block; height: 100%; width: 0; border-radius: 4px; background: var(--accent); transition: width 1.4s cubic-bezier(.22,1,.36,1); }
.d4-card.in .d4-bar i { width: var(--w); }
.d4-val { font-family: 'JetBrains Mono', monospace; font-size: 11.5px; color: var(--text); text-align: right; }
.d4-donut { display: flex; align-items: center; gap: 22px; }
.d4-donut svg { flex-shrink: 0; }
.d4-donut-key { display: flex; flex-direction: column; gap: 9px; font-size: 12.5px; color: var(--body); }
.d4-donut-key span { display: flex; align-items: center; gap: 8px; }
.d4-donut-key i { width: 9px; height: 9px; border-radius: 2px; display: block; flex-shrink: 0; }
.d4-gauge { text-align: center; }
.d4-gauge-fig { font-family: 'JetBrains Mono', monospace; font-size: 30px; font-weight: 700; color: var(--text); margin-top: -46px; }
.d4-gauge-lbl { font-size: 12.5px; color: var(--body); margin-top: 12px; }
.d4-spark { display: block; margin-top: 12px; }

/* ---- D6 mini hub ---- */
.d6 { position: relative; width: 100%; max-width: 520px; aspect-ratio: 1 / 1; margin: 0 auto; }
.d6-core { position: absolute; left: 50%; top: 50%; transform: translate(-50%, -50%); width: 33%; height: 33%; border-radius: 50%; background: var(--hub-core-bg); border: var(--hub-core-ringw) solid var(--hub-core-ring); box-shadow: var(--hub-core-shadow); display: flex; flex-direction: column; align-items: center; justify-content: center; text-align: center; padding: 10px; z-index: 2; }
.d6-core-t { font-size: 13px; font-weight: 700; letter-spacing: 0.4px; line-height: 1.25; color: var(--hub-core-title); }
.d6-core-s { font-family: 'JetBrains Mono', monospace; font-size: 8.5px; letter-spacing: 0.1em; margin-top: 6px; color: var(--body); }
.d6-glow { position: absolute; left: 50%; top: 50%; width: 40%; height: 40%; border-radius: 50%; background: var(--hub-core-glow); animation: cnHubPulse 4.8s ease-in-out infinite; }
.d6-orbit { position: absolute; left: 50%; top: 50%; transform: translate(-50%, -50%); width: 46%; height: 46%; border-radius: 50%; border: 1px dashed var(--hub-orbit); animation: cnHubSpin 70s linear infinite; }
.d6-spoke { position: absolute; left: 16%; right: 16%; top: 50%; height: 1px; background: var(--hub-spoke); }
.d6-node { position: absolute; transform: translate(-50%, -50%); z-index: 3; background: var(--hub-chip-bg); border: 1px solid var(--hub-chip-border); color: var(--hub-chip-text); border-radius: 8px; padding: 10px 12px; width: 148px; text-align: center; }
a.d6-node:hover { border-color: var(--hub-core-ring); color: var(--hub-chip-text); }
.d6-node-t { font-size: 12px; font-weight: 600; line-height: 1.3; }
.d6-node-d { font-family: 'JetBrains Mono', monospace; font-size: 8.5px; letter-spacing: 0.06em; color: var(--muted); margin-top: 5px; }

/* ---- Cogent OS product tour tabs ---- */
.os-tabs { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 22px; }
.os-tab { font-size: 13px; font-weight: 500; padding: 10px 16px; border-radius: 100px; border: 1px solid var(--line); background: var(--surface); color: var(--body); cursor: pointer; transition: all .16s ease; }
.os-tab:hover { border-color: var(--accent); color: var(--text); }
.os-tab.on { background: var(--accent); border-color: var(--accent); color: var(--on-accent); font-weight: 600; }
.os-panel { display: none; }
.os-panel.on { display: block; }

/* ---- forms ---- */
.cn-input { width: 100%; font-family: Inter, system-ui, sans-serif; font-size: 14.5px; color: var(--text); background: var(--bg-alt); border: 1px solid var(--line); border-radius: 7px; padding: 12px 14px; outline: none; transition: border-color .16s ease; }
.cn-input:focus { border-color: var(--accent); }
.cn-input::placeholder { color: var(--muted); }
textarea.cn-input { resize: vertical; line-height: 1.6; }
select.cn-input { appearance: none; cursor: pointer; }