/* ─────────────────────────────────────────────────────────
   case-platform.css — CHIYIGO 會員系統 互動式架構頁
   依賴 portfolio.css 提供 dash-wrap / sidebar / footer / hero base
   ───────────────────────────────────────────────────────── */

.cp-section{padding:32px 0 80px;max-width:1280px;margin:0 auto}

/* ── Hero ── */
.cp-hero{padding:48px 32px 24px}
.cp-hero .eyebrow{font-family:'DM Mono',monospace;color:var(--accent);font-size:13px;letter-spacing:.04em;margin:0 0 14px}
.cp-title{font-size:clamp(34px,5vw,56px);line-height:1.12;font-weight:700;margin:0 0 18px;letter-spacing:-.01em}
.cp-title .pt-dim{color:var(--text-muted);display:block}
.cp-title .pt-grad{display:block;background:linear-gradient(90deg,var(--accent),#8c91ff 60%,var(--accent));-webkit-background-clip:text;background-clip:text;color:transparent}
.cp-sub{max-width:720px;color:var(--text-muted);font-size:16px;line-height:1.65;margin:0 0 28px}

.cp-stats{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;max-width:780px}
.cp-stat{padding:18px 16px;border:1px solid var(--border);border-radius:14px;background:var(--bg-elevated);display:flex;flex-direction:column;gap:6px}
.cp-stat-n{font-family:'DM Mono',monospace;font-size:28px;font-weight:600;color:var(--text,#e7eaf3);letter-spacing:-.02em}
.cp-stat-l{font-size:12px;color:var(--text-muted);letter-spacing:.02em}

/* ── Architecture ── */
.cp-arch{margin-top:40px;padding:32px;border:1px solid var(--border);border-radius:20px;background:var(--bg-elevated)}
.cp-arch-head{margin-bottom:24px}
.cp-arch-title{font-family:'DM Mono',monospace;font-size:14px;color:var(--accent);letter-spacing:.04em;font-weight:500;margin:0 0 6px}
.cp-arch-hint{font-size:13px;color:var(--text-muted);margin:0}

.cp-arch-cover{display:block;width:100%;aspect-ratio:16/9;margin:0 0 24px;border-radius:14px;overflow:hidden;border:1px solid var(--border);background:var(--bg-elevated);position:relative}
.cp-arch-cover img{width:100%;height:100%;object-fit:cover;display:block;transition:transform .4s ease}
.cp-arch-cover:hover img{transform:scale(1.03)}
.cp-arch-cover:focus-visible{outline:2px solid var(--accent);outline-offset:3px}

.cp-arch-grid{display:grid;grid-template-columns:minmax(0,1.4fr) minmax(0,1fr);gap:24px;align-items:start}

/* ── Stage (nodes + svg lines) ── */
.cp-stage{position:relative;width:100%;aspect-ratio:1.05/1;min-height:480px;border-radius:14px;background:radial-gradient(circle at 50% 50%,rgba(108,110,229,.08),transparent 65%)}
.cp-lines{position:absolute;inset:0;width:100%;height:100%;pointer-events:none;overflow:visible}
.cp-lines line{stroke:var(--accent);stroke-width:1.2;stroke-opacity:.18;transition:stroke-opacity .2s,stroke-width .2s}
.cp-lines line.active{stroke-opacity:.85;stroke-width:1.8}
.cp-lines line.dim{stroke-opacity:.06}

.cp-node{position:absolute;transform:translate(-50%,-50%);background:var(--bg,#0e1018);border:1px solid var(--border-mid);color:var(--text,#e7eaf3);font-family:inherit;font-size:13px;font-weight:500;padding:10px 14px;border-radius:12px;cursor:pointer;transition:transform .18s ease,border-color .18s,box-shadow .18s,background .18s;display:flex;align-items:center;gap:8px;white-space:nowrap;line-height:1.2}
.cp-node:hover{border-color:var(--accent);transform:translate(-50%,-50%) scale(1.05);box-shadow:0 0 0 4px rgba(108,110,229,.12)}
.cp-node:focus-visible{outline:2px solid var(--accent);outline-offset:3px}
.cp-node.active{background:var(--accent);color:#fff;border-color:var(--accent);box-shadow:0 8px 28px rgba(108,110,229,.45)}
.cp-node.dim{opacity:.35}
.cp-node-dot{width:7px;height:7px;border-radius:50%;background:var(--accent);box-shadow:0 0 0 3px rgba(108,110,229,.18);flex:0 0 auto}
.cp-node.active .cp-node-dot{background:#fff;box-shadow:0 0 0 3px rgba(255,255,255,.25)}

.cp-node-core{padding:18px 22px;font-size:15px;font-weight:700;background:linear-gradient(135deg,var(--accent),#8c91ff);color:#fff;border-color:transparent;box-shadow:0 14px 38px rgba(108,110,229,.4),0 0 0 1px rgba(255,255,255,.08) inset}
.cp-node-core:hover{transform:translate(-50%,-50%) scale(1.04)}
.cp-node-core .cp-node-dot{background:#fff;box-shadow:0 0 0 4px rgba(255,255,255,.25)}
.cp-node-core-sub{font-size:11px;opacity:.85;font-weight:500;display:block;margin-top:2px;letter-spacing:.02em;font-family:'DM Mono',monospace}

/* ── Panel ── */
.cp-panel{position:sticky;top:24px;border:1px solid var(--border);border-radius:14px;background:var(--bg,#0e1018);padding:24px;min-height:480px;max-height:78vh;overflow-y:auto}

/* ── Panel picker (dropdown selector) ── */
.cp-panel-picker{margin-bottom:18px;padding-bottom:16px;border-bottom:1px dashed var(--border)}
.cp-panel-picker-label{display:block;font-family:'DM Mono',monospace;font-size:11px;color:var(--text-muted);letter-spacing:.06em;text-transform:uppercase;margin:0 0 8px}
.cp-panel-select{width:100%;padding:10px 36px 10px 12px;border-radius:10px;border:1px solid var(--border-mid);background-color:var(--bg-elevated);color:var(--text,#e7eaf3);font-family:inherit;font-size:14px;line-height:1.3;cursor:pointer;appearance:none;-webkit-appearance:none;background-image:url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 12 8' fill='none'><path d='M1 1l5 5 5-5' stroke='%236C6EE5' stroke-width='1.6' stroke-linecap='round' stroke-linejoin='round'/></svg>");background-repeat:no-repeat;background-position:right 14px center;background-size:11px 8px;transition:.15s}
.cp-panel-select:hover{border-color:var(--accent)}
.cp-panel-select:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-color:var(--accent)}
.cp-panel-select option{background:#0e1018;color:#e7eaf3;padding:4px 8px}
.cp-panel-empty{display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;padding:48px 16px;color:var(--text-muted);min-height:380px}
.cp-panel-empty[hidden],.cp-panel-body[hidden]{display:none !important}
.cp-panel-icon{font-size:36px;color:var(--accent);opacity:.5;margin-bottom:14px}
.cp-panel-empty-text{font-size:14px;line-height:1.6;max-width:280px;margin:0}

.cp-panel-head{display:flex;align-items:flex-start;gap:10px;margin-bottom:20px;padding-bottom:16px;border-bottom:1px dashed var(--border-mid)}
.cp-panel-tag{display:inline-block;padding:3px 10px;background:rgba(108,110,229,.15);color:var(--accent);font-family:'DM Mono',monospace;font-size:11px;letter-spacing:.04em;border-radius:6px;margin-top:4px;flex:0 0 auto}
.cp-panel-title{font-size:20px;font-weight:600;margin:0;line-height:1.3;flex:1;color:var(--text,#e7eaf3)}
.cp-panel-close{flex:0 0 auto;width:28px;height:28px;border-radius:6px;border:1px solid var(--border-mid);background:transparent;color:var(--text-muted);font-size:18px;line-height:1;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:.15s}
.cp-panel-close:hover{background:var(--bg-elevated);color:var(--text,#e7eaf3)}

.cp-panel-block{margin-bottom:18px}
.cp-panel-block:last-child{margin-bottom:0}
.cp-panel-h{font-family:'DM Mono',monospace;font-size:11px;color:var(--accent);letter-spacing:.06em;text-transform:uppercase;margin:0 0 8px;font-weight:500}
.cp-panel-p{font-size:14px;line-height:1.65;color:var(--text,#e7eaf3);margin:0}
.cp-panel-list{margin:0;padding-left:18px;font-size:13.5px;line-height:1.7;color:var(--text,#e7eaf3)}
.cp-panel-list li{margin-bottom:4px}
.cp-mono{font-family:'DM Mono',monospace;font-size:12px;color:var(--text-muted)}
.cp-mono li{padding:3px 0}
.cp-panel-tags{display:flex;flex-wrap:wrap;gap:6px}
.cp-panel-tags span{padding:4px 10px;background:rgba(108,110,229,.1);color:var(--accent);font-family:'DM Mono',monospace;font-size:11px;border-radius:6px;border:1px solid rgba(108,110,229,.2)}

/* ── Tech stack band ── */
.cp-stack{margin-top:40px;padding:32px}
.cp-stack-title{font-family:'DM Mono',monospace;font-size:14px;color:var(--accent);letter-spacing:.04em;font-weight:500;margin:0 0 22px}
.cp-stack-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.cp-stack-col{padding:18px;border:1px solid var(--border);border-radius:12px;background:var(--bg-elevated)}
.cp-stack-h{font-family:'DM Mono',monospace;font-size:11px;letter-spacing:.05em;color:var(--accent);text-transform:uppercase;margin-bottom:10px;font-weight:600}
.cp-stack-l{font-size:13px;line-height:1.65;color:var(--text-muted)}

/* ── Light mode overrides ──
   多數 cascade 已交給 _tokens.css 的 light root + 新 token swap 處理；
   這裡只保留 token 系統無法表達的兩項設計意圖：
   1. .cp-node / .cp-panel 在 light 模式用 surface/elevated tier 的「白卡」
      跳出 page bg（var(--bg) light = #F0F2FA，會跟 page 重疊）
   2. <option> 元素 Chrome on Windows 不繼承 select color 也不解析 var()，
      必須 hardcoded hex（per [[feedback_select_option_explicit_colors]]）
*/
:root.theme-light .cp-node{background:var(--bg-surface);border-color:var(--border-mid);color:var(--text)}
:root.theme-light .cp-panel{background:var(--bg-elevated);border-color:var(--border)}
:root.theme-light .cp-panel-select option{background:#fff;color:#1a1d2b}

/* ── Mobile ── */
@media (max-width:960px){
  .cp-arch-grid{grid-template-columns:1fr;gap:16px}
  .cp-panel{position:static;max-height:none;min-height:0}
  .cp-stage{aspect-ratio:auto;min-height:0;display:block;background:none;padding:0}
  .cp-lines{display:none}
  .cp-stage{display:flex;flex-direction:column;gap:8px}
  .cp-node{position:static;transform:none;justify-content:flex-start;width:100%;padding:14px 16px;border-radius:10px;white-space:normal;overflow-wrap:anywhere;line-height:1.4;text-align:left}
  .cp-node:hover{transform:none}
  .cp-node.active{transform:none}
  .cp-node-core{order:-1;justify-content:center;margin-bottom:8px;padding:18px;font-size:15px;text-align:center}
  .cp-node-core .cp-node-core-sub{display:block;margin:4px 0 0;font-size:10px;opacity:.75}
  .cp-stats{grid-template-columns:repeat(2,1fr)}
  .cp-stack-grid{grid-template-columns:1fr 1fr}
  .cp-hero{padding:32px 20px 16px}
  .cp-arch{padding:20px;margin-top:24px}
  .cp-stack{padding:20px;margin-top:24px}
}
@media (max-width:520px){
  .cp-stats{grid-template-columns:1fr 1fr}
  .cp-stack-grid{grid-template-columns:1fr}
  .cp-title{font-size:32px}
}

/* ── Reduced motion：關掉背景 canvas + 節點動畫 ── */
@media (prefers-reduced-motion:reduce){
  #neural-canvas{display:none}
  .cp-node,.cp-lines line{transition:none}
  .cp-node:hover{transform:translate(-50%,-50%)}
  .cp-arch-cover img{transition:none}
  .cp-arch-cover:hover img{transform:none}
  [data-reveal]{opacity:1;transform:none}
}