/* PHOSPHOR-amber for site-v2 — plain-CSS port of the July SCSS tokens
   (docs/multi_agent/2026-07-phosphor-amber/SPEC.md §1–§2). Every color
   token is a six-digit hex; T4 recomputes the §1.2 pairs from this file.
   Precedence (SPEC §5): light on :root; OS dark via media query when no
   data-theme is set; explicit [data-theme] blocks last. */
@import url("https://fonts.googleapis.com/css2?family=IBM+Plex+Mono:ital,wght@0,400;0,500;0,700;1,400&family=Noto+Sans+TC:wght@400;700&display=swap");

:root {
  --phos-paper: #f4f2ec;
  --phos-paper-2: #eae6dd;
  --phos-ink: #1a1714;
  --phos-muted: #6f695f;
  --phos-line: #1a1714;
  --phos-line-soft: #cdc7ba;
  --phos-accent: #c2660f;
  --phos-accent-bright: #ff9e2c;
  --phos-accent-text: #9b530d;
  --phos-accent-strong: #97500c;
  --phos-terminal-bg: #0e0c0b;
  --phos-terminal-fg: #cfc9bd;
  --phos-terminal-dim: #8a8478;
  --phos-selection-bg: #97500c;
  --phos-selection-fg: #f4f2ec;
  --phos-btn-hover-bg: #97500c;
  --phos-btn-hover-fg: #f4f2ec;
  --phos-glow: none;
  --phos-glow-strong: 0 0 8px rgba(255, 158, 44, 0.55);
  --phos-font-body: 'IBM Plex Mono', 'Noto Sans TC', 'PingFang TC', 'Microsoft JhengHei', ui-monospace, SFMono-Regular, Menlo, monospace;
  --phos-font-display: 'IBM Plex Mono', 'Noto Sans TC', 'PingFang TC', 'Microsoft JhengHei', ui-monospace, SFMono-Regular, Menlo, monospace;
  --phos-dither: repeating-conic-gradient(var(--phos-ink) 0 25%, transparent 0 50%) 0 0 / 7px 7px;
  --phos-card: transparent;
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) {
    --phos-paper: #14110f;
    --phos-paper-2: #1b1714;
    --phos-ink: #ece7dd;
    --phos-muted: #8d877b;
    --phos-line: #39332c;
    --phos-line-soft: #2a251f;
    --phos-accent: #ff9e2c;
    --phos-accent-bright: #ff9e2c;
    --phos-accent-text: #ff9e2c;
    --phos-accent-strong: #ff9e2c;
    --phos-terminal-bg: #0b0a09;
    --phos-terminal-fg: #cfc9bd;
    --phos-terminal-dim: #8a8478;
    --phos-selection-bg: #ff9e2c;
    --phos-selection-fg: #14110f;
    --phos-btn-hover-bg: #ff9e2c;
    --phos-btn-hover-fg: #14110f;
    --phos-glow: 0 0 9px rgba(255, 158, 44, 0.5);
    --phos-glow-strong: 0 0 8px rgba(255, 158, 44, 0.55);
    --phos-card: #1b1714;
    color-scheme: dark;
  }
}

[data-theme="dark"] {
  --phos-paper: #14110f;
  --phos-paper-2: #1b1714;
  --phos-ink: #ece7dd;
  --phos-muted: #8d877b;
  --phos-line: #39332c;
  --phos-line-soft: #2a251f;
  --phos-accent: #ff9e2c;
  --phos-accent-bright: #ff9e2c;
  --phos-accent-text: #ff9e2c;
  --phos-accent-strong: #ff9e2c;
  --phos-terminal-bg: #0b0a09;
  --phos-terminal-fg: #cfc9bd;
  --phos-terminal-dim: #8a8478;
  --phos-selection-bg: #ff9e2c;
  --phos-selection-fg: #14110f;
  --phos-btn-hover-bg: #ff9e2c;
  --phos-btn-hover-fg: #14110f;
  --phos-glow: 0 0 9px rgba(255, 158, 44, 0.5);
  --phos-glow-strong: 0 0 8px rgba(255, 158, 44, 0.55);
  --phos-card: #1b1714;
  color-scheme: dark;
}

[data-theme="light"] {
  --phos-paper: #f4f2ec;
  --phos-paper-2: #eae6dd;
  --phos-ink: #1a1714;
  --phos-muted: #6f695f;
  --phos-line: #1a1714;
  --phos-line-soft: #cdc7ba;
  --phos-accent: #c2660f;
  --phos-accent-bright: #ff9e2c;
  --phos-accent-text: #9b530d;
  --phos-accent-strong: #97500c;
  --phos-terminal-bg: #0e0c0b;
  --phos-terminal-fg: #cfc9bd;
  --phos-terminal-dim: #8a8478;
  --phos-selection-bg: #97500c;
  --phos-selection-fg: #f4f2ec;
  --phos-btn-hover-bg: #97500c;
  --phos-btn-hover-fg: #f4f2ec;
  --phos-glow: none;
  --phos-glow-strong: 0 0 8px rgba(255, 158, 44, 0.55);
  --phos-card: transparent;
  color-scheme: light;
}

/* ---------------------------------------------------------------- base */
*, *::before, *::after { box-sizing: border-box; }
html { font-size: 16px; }
body {
  margin: 0;
  background: var(--phos-paper);
  color: var(--phos-ink);
  font-family: var(--phos-font-body);
  font-size: 16px;
  line-height: 1.6;
}
h1, h2, h3, h4, h5, h6 {
  font-family: var(--phos-font-display);
  font-weight: 700;
  letter-spacing: 0.02em;
  line-height: 1.25;
  margin: 1.5em 0 0.5em;
}
h1 { font-size: 30px; margin-top: 0.5em; }
h2 { font-size: 22px; }
h3 { font-size: 18px; }
h4, h5, h6 { font-size: 16px; }
h1::before { content: "▮ "; content: "▮ " / ""; color: var(--phos-accent); text-shadow: var(--phos-glow); }
p, ul, ol, table, pre, blockquote { margin: 0 0 1em; }
a { color: var(--phos-accent-text); text-decoration: none; text-underline-offset: 3px; }
a:hover, a:focus { text-decoration: underline; }
hr { border: 0; border-top: 1px solid var(--phos-line); margin: 2em 0; }
img { max-width: 100%; height: auto; }
small, .small { font-size: 12px; }

/* --------------------------------------------- focus + motion (§1.3) */
:focus-visible { outline: 2px solid var(--phos-accent-text); outline-offset: 2px; }
pre :focus-visible, pre:focus-visible { outline-color: var(--phos-accent-bright); }
@media (prefers-reduced-motion: no-preference) {
  @keyframes blink { 50% { opacity: 0; } }
  .brand::after { animation: blink 1.2s steps(1) infinite; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; scroll-behavior: auto !important; }
}

/* ------------------------------------------- selection + marks (§1.4) */
::selection { background: var(--phos-selection-bg); color: var(--phos-selection-fg); text-shadow: none; }
mark { background: var(--phos-selection-bg); color: var(--phos-selection-fg); padding: 0 0.15em; }

/* --------------------------------------------------------- navigation */
.site-header { border-bottom: 1px solid var(--phos-line); background: var(--phos-paper); }
.site-nav { max-width: 72rem; margin: 0 auto; padding: 0.75rem 1rem; display: flex; flex-wrap: wrap; align-items: center; gap: 0.5rem 1.25rem; }
.brand { font-weight: 700; text-transform: uppercase; letter-spacing: 0.04em; color: var(--phos-accent-text); text-shadow: var(--phos-glow); }
.brand::after { content: "▮"; content: "▮" / ""; color: var(--phos-accent); margin-left: 0.15em; }
.site-nav ul { list-style: none; display: flex; flex-wrap: wrap; gap: 0.25rem 1rem; margin: 0 auto 0 0; padding: 0; }
.site-nav li a { font-size: 12px; text-transform: uppercase; letter-spacing: 0.1em; color: var(--phos-ink); }
.site-nav li a:hover, .site-nav li a:focus, .site-nav li a[aria-current="page"] { color: var(--phos-accent-text); }
.site-nav li a[aria-current="page"] { text-decoration: underline; text-underline-offset: 4px; }
main { max-width: 72rem; margin: 0 auto; padding: 1.5rem 1rem 3rem; }
.site-footer { border-top: 1px solid var(--phos-line); }
.site-footer p { max-width: 72rem; margin: 0 auto; padding: 1rem; font-size: 12px; color: var(--phos-muted); }
.mirror-link { font-size: 12px; text-transform: uppercase; letter-spacing: 0.08em; }

/* ------------------------------------------------------------ buttons */
button, .btn {
  font: inherit; font-size: 12px; text-transform: uppercase; letter-spacing: 0.1em;
  padding: 6px 12px; border: 1px solid var(--phos-ink); border-radius: 0;
  background: transparent; color: var(--phos-ink); cursor: pointer;
}
button:hover, button:focus, .btn:hover, .btn:focus { background: var(--phos-ink); color: var(--phos-paper); }
.btn-primary, button[type="submit"] { background: var(--phos-ink); color: var(--phos-paper); }
.btn-primary:hover, .btn-primary:focus, button[type="submit"]:hover, button[type="submit"]:focus {
  background: var(--phos-btn-hover-bg); border-color: var(--phos-btn-hover-bg); color: var(--phos-btn-hover-fg);
}
button:disabled, .btn:disabled {
  color: var(--phos-muted); background: var(--phos-paper); border-color: var(--phos-line-soft); opacity: 1; cursor: not-allowed;
}

/* -------------------------------------------- form controls (gate form) */
label { font-size: 12px; text-transform: uppercase; letter-spacing: 0.1em; }
input, textarea, select {
  font: inherit; font-size: 14px; background: var(--phos-paper); color: var(--phos-ink);
  border: 1px solid var(--phos-line); border-radius: 0; padding: 6px 10px;
}
input:focus, textarea:focus, select:focus { border-color: var(--phos-accent-text); }
::placeholder { color: var(--phos-muted); opacity: 1; }
.gate-form { max-width: 28rem; margin: 3rem auto; }
.gate-form input { width: 100%; margin: 0.25rem 0 1rem; }

/* ------------------------------------------------------------- tables */
table { border-collapse: collapse; width: 100%; font-size: 14px; border-top: 1px solid var(--phos-line); border-bottom: 1px solid var(--phos-line); }
thead th { background: var(--phos-ink); color: var(--phos-paper); font-size: 12px; font-weight: 500; text-transform: uppercase; letter-spacing: 0.1em; text-align: left; padding: 9px 14px; }
tbody td { padding: 8px 14px; border-bottom: 1px solid var(--phos-line-soft); vertical-align: top; }
tbody tr:hover td { background: var(--phos-paper-2); }
.collection--table { overflow-x: auto; }

/* --------------------------------------------------------------- cards */
.cards { display: grid; gap: 1rem; grid-template-columns: repeat(auto-fill, minmax(20rem, 1fr)); margin: 0 0 1.5em; }
.card { background: var(--phos-card); border: 1px solid var(--phos-line-soft); padding: 1rem 1.25rem; }
.card-title, .card h2, .card h3 { font-size: 18px; margin: 0 0 0.5rem; }
.card-meta { font-size: 12px; text-transform: uppercase; letter-spacing: 0.08em; color: var(--phos-muted); margin: 0 0 0.5rem; }
.card-desc { font-size: 14px; margin: 0 0 0.75rem; }
.card-materials { list-style: none; padding: 0; margin: 0; font-size: 14px; }
.card dl { margin: 0; font-size: 14px; }
.card dt { font-size: 11px; text-transform: uppercase; letter-spacing: 0.12em; color: var(--phos-muted); margin-top: 0.5rem; }
.card dd { margin: 0; }

/* --------------------------------------------- code: terminal treatment */
code, kbd { font-family: var(--phos-font-body); font-size: 0.9em; background: var(--phos-paper-2); color: var(--phos-ink); border: 1px solid var(--phos-line-soft); padding: 0.1em 0.3em; }
pre { background: var(--phos-terminal-bg); color: var(--phos-terminal-fg); border: 1px solid var(--phos-line); padding: 20px; font-size: 13px; line-height: 1.7; overflow-x: auto; }
pre code { background: transparent; color: var(--phos-terminal-fg); border: 0; padding: 0; font-size: inherit; }
pre .comment, pre .co { color: var(--phos-terminal-dim); }

/* ---------------------------------------------- blockquote + notices */
blockquote { border-left: 2px solid var(--phos-accent); margin-left: 0; padding: 2px 0 2px 18px; color: var(--phos-muted); }
.notice { background: var(--phos-paper-2); color: var(--phos-ink); border: 1px solid var(--phos-line-soft); padding: 1rem 1.25rem; }
figcaption, caption { font-size: 12px; color: var(--phos-muted); text-transform: uppercase; letter-spacing: 0.08em; }