/* ═══════════════════════════════════════════════════════════════════
   Agent Project Bootstrap — "Warm Precision"
   Dark warm-toned documentation. Engineering manual aesthetic.
   ═══════════════════════════════════════════════════════════════════ */

:root {
  --bg:           #171411;
  --bg-deeper:    #12100d;
  --surface:      #201d18;
  --surface-hi:   #28251f;
  --border:       #332e27;
  --border-hi:    #4a3f30;
  --text:         #dbd4c7;
  --text-hi:      #ede7dc;
  --muted:        #8a8276;
  --accent:       #d49528;
  --accent-dim:   #a87018;
  --accent-glow:  #f0b840;
  --green:        #7a9e48;
  --green-dim:    #2a3818;
  --yellow:       #c49028;
  --yellow-dim:   #382a10;
  --red:          #c55542;
  --purple:       #9878be;
  --purple-dim:   #281a38;
  --blue:         #5898cc;
  --blue-dim:     #182838;
  --code-bg:      #1c1915;
  --radius:       6px;
  --radius-lg:    10px;
  --transition:   180ms ease;
  --font-body:    "Noto Sans SC", "PingFang SC", "Source Han Sans SC",
                  "Microsoft YaHei", system-ui, -apple-system, sans-serif;
  --font-mono:    "JetBrains Mono", "Cascadia Code", "Fira Code",
                  "SF Mono", "Consolas", "Source Code Pro", monospace;
}

/* ── Reset ────────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

/* ── Grain texture overlay ────────────────────────────────────── */
body::before {
  content: '';
  position: fixed; inset: 0; z-index: 99999;
  pointer-events: none;
  opacity: 0.04;
  background: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.75' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

/* ── Body ─────────────────────────────────────────────────────── */
body {
  font-family: var(--font-body);
  background:
    linear-gradient(rgba(255,255,255,0.010) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.010) 1px, transparent 1px),
    radial-gradient(ellipse at 50% 0%, rgba(80,50,20,0.12) 0%, transparent 70%),
    var(--bg);
  background-size: 52px 52px, 52px 52px, 100% 100%, 100% 100%;
  background-attachment: fixed;
  color: var(--text);
  line-height: 1.72;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

/* ── Thin accent line at page top ─────────────────────────────── */
body::after {
  content: '';
  position: fixed; top: 0; left: 0; right: 0; z-index: 100000;
  height: 2px;
  pointer-events: none;
  background: linear-gradient(90deg,
    transparent 0%,
    var(--accent-dim) 15%,
    var(--accent) 50%,
    var(--accent-dim) 85%,
    transparent 100%
  );
  animation: topLinePulse 4s ease-in-out infinite;
}

@keyframes topLinePulse {
  0%, 100% { opacity: 0.6; }
  50%      { opacity: 1; }
}

/* ── Content wrapper ──────────────────────────────────────────── */
main {
  max-width: 980px;
  margin: 0 auto;
  padding: 2.5rem 1.75rem 4rem;
  position: relative;
  z-index: 1;
}

/* ── Nav ──────────────────────────────────────────────────────── */
nav {
  max-width: 980px;
  margin: 0 auto;
  padding: 1.25rem 1.75rem 0;
  position: relative;
  z-index: 2;
  display: flex;
  align-items: baseline;
  gap: 1.75rem;
  flex-wrap: wrap;
}

nav::after {
  content: '';
  display: block;
  width: 100%;
  height: 1px;
  background: linear-gradient(90deg,
    transparent 0%,
    var(--border) 10%,
    var(--border-hi) 50%,
    var(--border) 90%,
    transparent 100%
  );
  margin-top: .85rem;
}

nav .brand {
  color: var(--text-hi);
  font-weight: 700;
  font-size: .95rem;
  letter-spacing: 0.04em;
  margin-right: auto;
  position: relative;
}

nav .brand::after {
  content: '';
  position: absolute;
  bottom: -2px; left: 0;
  width: 100%; height: 1px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition);
}

nav .brand:hover::after { transform: scaleX(1); }

nav a {
  color: var(--muted);
  text-decoration: none;
  font-size: .88rem;
  font-weight: 500;
  position: relative;
  padding: 2px 0;
  transition: color var(--transition);
}

nav a::after {
  content: '';
  position: absolute;
  bottom: -2px; left: 0;
  width: 100%; height: 1px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: right;
  transition: transform 220ms ease;
}

nav a:hover { color: var(--text); }
nav a:hover::after { transform: scaleX(1); transform-origin: left; }
nav a.active { color: var(--accent); }
nav a.active::after { transform: scaleX(1); background: var(--accent); }

/* ── Headings ─────────────────────────────────────────────────── */
h1 {
  font-size: 2rem;
  font-weight: 700;
  color: var(--text-hi);
  margin: 2.25rem 0 .5rem;
  letter-spacing: -0.02em;
  position: relative;
}

h1::before {
  content: '';
  display: inline-block;
  width: 4px; height: 1.15em;
  background: var(--accent);
  border-radius: 2px;
  margin-right: .55rem;
  vertical-align: text-bottom;
  animation: headingBar 2.4s ease-in-out infinite;
}

@keyframes headingBar {
  0%, 100% { background: var(--accent); }
  50%      { background: var(--accent-glow); box-shadow: 0 0 8px rgba(212,149,40,0.3); }
}

h2 {
  font-size: 1.3rem;
  font-weight: 650;
  color: var(--text-hi);
  margin: 2.5rem 0 .75rem;
  padding-bottom: .4rem;
  border-bottom: 1px solid var(--border);
  letter-spacing: -0.01em;
}

h3 {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text);
  margin: 1.5rem 0 .5rem;
}

p { margin-bottom: .6rem; }

/* ── Links ────────────────────────────────────────────────────── */
a { color: var(--accent); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--accent-glow); }

/* ── Inline code ──────────────────────────────────────────────── */
code {
  background: var(--code-bg);
  padding: .18em .45em;
  border-radius: 3px;
  font-family: var(--font-mono);
  font-size: .88em;
  border: 1px solid rgba(255,255,255,0.04);
  overflow-wrap: anywhere;
  word-break: break-all;
}

.status-card code,
.status-card td {
  overflow-wrap: anywhere;
  word-break: break-all;
}

/* ── Pre / Code blocks ────────────────────────────────────────── */
pre {
  background: var(--code-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem 1.2rem;
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: .84rem;
  line-height: 1.55;
  margin: 1rem 0;
  position: relative;
}

pre::before {
  content: '';
  position: absolute; top: 0; left: 0; right: 0; height: 1px;
  background: linear-gradient(90deg, transparent, rgba(212,149,40,0.15), transparent);
  pointer-events: none;
}

/* ── Lists ────────────────────────────────────────────────────── */
ul, ol { padding-left: 1.5rem; margin-bottom: 1rem; }
li { margin-bottom: .45rem; }
li:last-child { margin-bottom: 0; }

/* ── Tables ───────────────────────────────────────────────────── */
table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.25rem 0;
  font-size: .93rem;
}

th, td {
  border: 1px solid var(--border);
  padding: .6rem .85rem;
  text-align: left;
  vertical-align: top;
}

th {
  background: var(--surface);
  font-weight: 600;
  color: var(--text-hi);
  font-size: .85rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

tr:nth-child(even) { background: rgba(255,255,255,0.012); }
tr { transition: background var(--transition); }
tbody tr:hover { background: rgba(212,149,40,0.03); }

/* ── Badges ───────────────────────────────────────────────────── */
.badge {
  display: inline-block;
  padding: .18em .65em;
  border-radius: 20px;
  font-size: .8rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  transition: transform var(--transition), box-shadow var(--transition);
}

.badge:hover { transform: translateY(-1px); }

.badge-done {
  background: var(--green-dim);
  color: var(--green);
  border: 1px solid rgba(122,158,72,0.2);
}
.badge-done:hover { box-shadow: 0 0 12px rgba(122,158,72,0.12); }

.badge-todo {
  background: var(--yellow-dim);
  color: var(--yellow);
  border: 1px solid rgba(196,144,40,0.2);
}
.badge-todo:hover { box-shadow: 0 0 12px rgba(196,144,40,0.12); }

.badge-p0 {
  background: #381a18;
  color: var(--red);
  border: 1px solid rgba(197,85,66,0.2);
}

.badge-plan {
  background: var(--blue-dim);
  color: var(--blue);
  border: 1px solid rgba(88,152,204,0.2);
}

.badge-core {
  background: var(--blue-dim);
  color: var(--blue);
  border: 1px solid rgba(88,152,204,0.2);
}

.badge-module {
  background: var(--purple-dim);
  color: var(--purple);
  border: 1px solid rgba(152,120,190,0.2);
}

/* ── Phase cards ──────────────────────────────────────────────── */
.phase {
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  margin: 1rem 0;
  overflow: hidden;
  background: var(--surface);
  transition: border-color var(--transition), box-shadow var(--transition);
}

.phase:hover {
  border-color: var(--border-hi);
  box-shadow: 0 2px 24px rgba(0,0,0,0.25), 0 0 0 1px rgba(212,149,40,0.04);
}

.phase-header {
  background: var(--surface-hi);
  padding: .7rem 1.1rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid var(--border);
}

.phase-body {
  padding: .85rem 1.1rem;
}

.phase-body ul { margin-bottom: 0; }

/* ── Diagram (ASCII art containers, kept for compat) ──────────── */
.diagram {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  margin: 1rem 0;
  font-family: var(--font-mono);
  font-size: .8rem;
  white-space: pre;
  line-height: 1.45;
  overflow-x: auto;
  position: relative;
}

.diagram::after {
  content: '';
  position: absolute;
  bottom: 0; left: 10%; right: 10%; height: 1px;
  background: linear-gradient(90deg, transparent, rgba(212,149,40,0.2), transparent);
}

/* ── Summary box (replaces ASCII quote boxes) ─────────────────── */
.summary-box {
  background: var(--surface);
  border: 1px solid var(--border-hi);
  border-radius: var(--radius-lg);
  padding: 1.5rem 1.75rem;
  margin: 1.25rem 0;
  position: relative;
  animation: fadeSlideIn 0.5s ease both;
  animation-delay: 0.08s;
}

.summary-box::before {
  content: '';
  position: absolute;
  top: 0; left: 1.5rem; right: 1.5rem;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--accent-dim), transparent);
}

.summary-box p {
  font-size: 1.02rem;
  line-height: 1.8;
  color: var(--text);
  margin-bottom: 0;
}

.summary-box p + p {
  margin-top: .75rem;
}

/* ── Tree diagram (replaces ASCII tree art) ───────────────────── */
.tree-diagram {
  margin: 1.25rem 0;
}

.tree-root {
  background: var(--surface);
  border: 1px solid var(--border-hi);
  border-radius: var(--radius-lg);
  padding: .75rem 1.1rem;
  font-weight: 700;
  color: var(--text-hi);
  font-family: var(--font-mono);
  font-size: .95rem;
  display: flex;
  align-items: center;
  gap: .5rem;
}

.tree-root::before {
  content: '';
  display: inline-block;
  width: 7px; height: 7px;
  background: var(--accent);
  border-radius: 50%;
  flex-shrink: 0;
}

.tree-branches {
  margin-left: 1.2rem;
  border-left: 1px solid var(--border);
  padding: .35rem 0 .35rem 0;
}

.tree-branch {
  margin: .35rem 0 .35rem 1.1rem;
  padding: .65rem 1rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  position: relative;
  transition: border-color var(--transition);
}

.tree-branch:hover {
  border-color: var(--border-hi);
}

.tree-branch::before {
  content: '';
  position: absolute;
  left: -1.15rem; top: 1.1rem;
  width: 1.1rem; height: 1px;
  background: var(--border);
}

.tree-branch-hd {
  display: flex;
  align-items: baseline;
  gap: .5rem;
  margin-bottom: .4rem;
  flex-wrap: wrap;
}

.tree-dir {
  font-family: var(--font-mono);
  font-weight: 650;
  font-size: .9rem;
  color: var(--text-hi);
}

.tree-tag {
  font-size: .8rem;
  color: var(--muted);
  font-style: italic;
}

.tree-leaves {
  display: flex;
  flex-wrap: wrap;
  gap: .3rem .55rem;
}

.tree-leaf {
  font-family: var(--font-mono);
  font-size: .78rem;
  color: var(--muted);
  padding: .1em .5em;
  background: var(--code-bg);
  border-radius: 3px;
  border: 1px solid rgba(255,255,255,0.03);
  white-space: nowrap;
}

/* ── Flow diagram (horizontal data flow) ──────────────────────── */
.flow-diagram {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: .5rem;
  flex-wrap: wrap;
  padding: 1.5rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  margin: 1rem 0;
}

.flow-node {
  background: var(--surface-hi);
  border: 1px solid var(--border-hi);
  border-radius: var(--radius);
  padding: .45rem 1rem;
  font-weight: 600;
  font-size: .9rem;
  color: var(--text-hi);
  transition: border-color var(--transition), box-shadow var(--transition);
}

.flow-node:hover {
  border-color: var(--accent);
  box-shadow: 0 0 16px rgba(212,149,40,0.08);
}

.flow-arrow {
  color: var(--accent);
  font-size: 1.1rem;
  font-weight: 700;
  padding: 0 .2rem;
}

/* ── Note callout ─────────────────────────────────────────────── */
.note {
  border-left: 3px solid var(--accent);
  padding: .65rem 1.1rem;
  margin: 1.25rem 0;
  background: var(--surface);
  border-radius: 0 var(--radius) var(--radius) 0;
  transition: border-color var(--transition);
}

.note strong { color: var(--accent); }

/* ── Footer ───────────────────────────────────────────────────── */
footer {
  margin-top: 3.5rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: .82rem;
}

/* ── Status grid & cards ──────────────────────────────────────── */
.status-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: .85rem;
  margin: 1.25rem 0;
}

.status-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.15rem;
  transition: border-color var(--transition), transform var(--transition), box-shadow var(--transition);
}

.status-card:hover {
  border-color: var(--border-hi);
  transform: translateY(-2px);
  box-shadow: 0 4px 20px rgba(0,0,0,0.2);
}

.status-card h3 { margin-top: 0 !important; }

/* ── TOC ──────────────────────────────────────────────────────── */
.toc {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.1rem 1.4rem;
  margin: 1.5rem 0;
}

.toc ol { margin-bottom: 0; }
.toc a { text-decoration: none; }

/* ── Scroll-reveal animation ──────────────────────────────────── */
.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.55s ease, transform 0.55s ease;
}

.reveal.revealed {
  opacity: 1;
  transform: translateY(0);
}

/* ── Staggered load-in (for initial page load) ────────────────── */
@keyframes fadeSlideIn {
  from { opacity: 0; transform: translateY(14px); }
  to   { opacity: 1; transform: translateY(0); }
}

h1                        { animation: fadeSlideIn 0.5s ease both; }
h1 + p                    { animation: fadeSlideIn 0.5s ease both; animation-delay: 0.06s; }
.status-grid              { animation: fadeSlideIn 0.5s ease both; animation-delay: 0.1s; }
h2:nth-of-type(1)         { animation: fadeSlideIn 0.5s ease both; animation-delay: 0.14s; }
.phase:nth-of-type(1)     { animation: fadeSlideIn 0.5s ease both; animation-delay: 0.1s; }
.phase:nth-of-type(2)     { animation: fadeSlideIn 0.5s ease both; animation-delay: 0.16s; }
.phase:nth-of-type(3)     { animation: fadeSlideIn 0.5s ease both; animation-delay: 0.22s; }
.phase:nth-of-type(4)     { animation: fadeSlideIn 0.5s ease both; animation-delay: 0.28s; }
.phase:nth-of-type(5)     { animation: fadeSlideIn 0.5s ease both; animation-delay: 0.34s; }
.phase:nth-of-type(6)     { animation: fadeSlideIn 0.5s ease both; animation-delay: 0.40s; }
.phase:nth-of-type(7)     { animation: fadeSlideIn 0.5s ease both; animation-delay: 0.46s; }
.note                     { animation: fadeSlideIn 0.5s ease both; animation-delay: 0.18s; }
.toc                      { animation: fadeSlideIn 0.5s ease both; animation-delay: 0.12s; }
footer                    { animation: fadeSlideIn 0.6s ease both; animation-delay: 0.4s; }

/* ── Selection ────────────────────────────────────────────────── */
::selection {
  background: rgba(212,149,40,0.25);
  color: var(--text-hi);
}

/* ── Scrollbar ────────────────────────────────────────────────── */
::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-track { background: var(--bg-deeper); }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: var(--border-hi); }
::-webkit-scrollbar-corner { background: var(--bg-deeper); }