:root {
  --bg:      #0d0b08;
  --surface: #141209;
  --surface2:#1c1810;
  --border:  #2e2818;
  --border2: #3d3520;
  --text:    #e8d9b0;
  --muted:   #6b5e3a;
  --bright:  #f5e8c0;

  --gold:    #f0a500;
  --amber:   #e07b00;
  --rust:    #c94d1e;
  --sage:    #6a8f6a;
  --steel:   #5a7a9a;
  --cream:   #f5e8c0;

  --p1: #f0a500;  /* Singleton - gold */
  --p2: #e07b00;  /* Factory - amber */
  --p3: #c94d1e;  /* Abstract Factory - rust */
  --p4: #6a8f6a;  /* Builder - sage */
  --p5: #5a7a9a;  /* Prototype - steel */
}

.m2-page {
  background: var(--bg);
  color: var(--text);
  font-family: 'Barlow', sans-serif;
  min-height: 100vh;
  overflow-x: hidden;
  position: relative;
  /* Override default site styles */
  margin: 0;
  padding: 0;
  line-height: 1.5;
}

/* Blueprint grid */
.m2-page::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(rgba(240,165,0,0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(240,165,0,0.03) 1px, transparent 1px);
  background-size: 32px 32px;
  pointer-events: none;
  z-index: 0;
}

/* HEADER */
.m2-header {
  position: relative;
  padding: 52px 64px 44px;
  border-bottom: 1px solid var(--border2);
  overflow: hidden;
  z-index: 1;
}
.m2-header::after {
  content: '';
  position: absolute;
  bottom: 0; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--gold), var(--amber), var(--rust), var(--sage), var(--steel));
}
.m2-header-eyebrow {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 10px;
  letter-spacing: 3px;
  color: var(--gold);
  text-transform: uppercase;
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 10px;
}
.m2-header-eyebrow::before {
  content: '';
  display: inline-block;
  width: 24px;
  height: 1px;
  background: var(--gold);
}
.m2-header h1 {
  font-family: 'Barlow Condensed', sans-serif;
  font-size: clamp(44px, 6vw, 80px);
  font-weight: 800;
  line-height: 0.95;
  color: var(--bright);
  margin-bottom: 6px;
  letter-spacing: -0.5px;
  border: none;
  padding: 0;
}
.m2-header h1 em {
  font-style: normal;
  color: var(--gold);
}
.m2-header-sub {
  font-family: 'Barlow Condensed', sans-serif;
  font-size: clamp(20px, 3vw, 32px);
  font-weight: 300;
  color: var(--muted);
  letter-spacing: 1px;
  margin-bottom: 24px;
}
.m2-pattern-strip {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-top: 20px;
}
.m2-p-badge {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 11px;
  padding: 5px 12px;
  border: 1px solid;
  letter-spacing: 0.5px;
  border-radius: 2px;
}

/* NAV */
.m2-nav {
  display: flex;
  border-bottom: 1px solid var(--border2);
  background: var(--surface);
  position: sticky;
  top: 0;
  z-index: 100;
  overflow-x: auto;
}
.m2-nav-tab {
  padding: 15px 22px;
  font-family: 'IBM Plex Mono', monospace;
  font-size: 11px;
  letter-spacing: 0.5px;
  color: var(--muted);
  cursor: pointer;
  border-bottom: 2px solid transparent;
  transition: all 0.2s;
  white-space: nowrap;
}
.m2-nav-tab:hover { color: var(--text); }
.m2-nav-tab.active { color: var(--gold); border-bottom-color: var(--gold); }

/* CONTENT */
.m2-content { padding: 48px 64px; position: relative; z-index: 1; max-width: 1300px; }
.m2-view { display: none; }
.m2-view.active { display: block; }
.m2-view p { margin-bottom: 1rem; }

/* OVERVIEW GRID */
.m2-overview-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 12px;
  margin-bottom: 40px;
}
.m2-overview-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 20px 16px;
  cursor: pointer;
  transition: all 0.2s;
  position: relative;
  overflow: hidden;
}
.m2-overview-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  transition: height 0.2s;
}
.m2-overview-card:hover::before { height: 6px; }
.m2-overview-card:hover { transform: translateY(-2px); }
.m2-oc-1::before { background: var(--p1); }
.m2-oc-2::before { background: var(--p2); }
.m2-oc-3::before { background: var(--p3); }
.m2-oc-4::before { background: var(--p4); }
.m2-oc-5::before { background: var(--p5); }
.m2-oc-num {
  font-family: 'Barlow Condensed', sans-serif;
  font-size: 40px;
  font-weight: 700;
  line-height: 1;
  margin-bottom: 6px;
}
.m2-oc-1 .m2-oc-num { color: var(--p1); }
.m2-oc-2 .m2-oc-num { color: var(--p2); }
.m2-oc-3 .m2-oc-num { color: var(--p3); }
.m2-oc-4 .m2-oc-num { color: var(--p4); }
.m2-oc-5 .m2-oc-num { color: var(--p5); }
.m2-oc-name { font-size: 13px; font-weight: 600; color: var(--bright); margin-bottom: 4px; }
.m2-oc-system { font-family: 'IBM Plex Mono', monospace; font-size: 10px; color: var(--muted); margin-bottom: 8px; }
.m2-oc-problem { font-size: 11px; color: var(--muted); line-height: 1.5; }

/* PATTERN NAV */
.m2-pat-nav {
  display: flex;
  gap: 8px;
  margin-bottom: 28px;
  flex-wrap: wrap;
}
.m2-pat-btn {
  padding: 8px 18px;
  background: var(--surface);
  border: 1px solid var(--border);
  font-family: 'Barlow Condensed', sans-serif;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.5px;
  cursor: pointer;
  transition: all 0.15s;
  color: var(--muted);
  border-radius: 2px;
}
.m2-pat-btn:hover { color: var(--text); border-color: var(--border2); }
.m2-pat-btn.p1.active { background: rgba(240,165,0,0.1); border-color: var(--p1); color: var(--p1); }
.m2-pat-btn.p2.active { background: rgba(224,123,0,0.1); border-color: var(--p2); color: var(--p2); }
.m2-pat-btn.p3.active { background: rgba(201,77,30,0.1); border-color: var(--p3); color: var(--p3); }
.m2-pat-btn.p4.active { background: rgba(106,143,106,0.1); border-color: var(--p4); color: var(--p4); }
.m2-pat-btn.p5.active { background: rgba(90,122,154,0.1); border-color: var(--p5); color: var(--p5); }

.m2-pat-panel { display: none; }
.m2-pat-panel.active { display: block; }

/* Pattern header */
.m2-pat-header {
  display: flex;
  align-items: flex-start;
  gap: 24px;
  margin-bottom: 28px;
  padding-bottom: 28px;
  border-bottom: 1px solid var(--border);
}
.m2-pat-number {
  font-family: 'Barlow Condensed', sans-serif;
  font-size: 100px;
  font-weight: 800;
  line-height: 1;
  flex-shrink: 0;
  opacity: 0.15;
}
.m2-pat-info { flex: 1; }
.m2-pat-name {
  font-family: 'Barlow Condensed', sans-serif;
  font-size: 36px;
  font-weight: 700;
  color: var(--bright);
  letter-spacing: 0.5px;
  margin-bottom: 4px;
}
.m2-pat-system {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 11px;
  color: var(--muted);
  margin-bottom: 12px;
}
.m2-pat-intent {
  font-size: 14px;
  color: var(--text);
  line-height: 1.6;
  padding: 12px 16px;
  background: var(--surface2);
  border-left: 3px solid;
  max-width: 640px;
}

/* Code block */
.m2-code-wrap {
  background: #09080500;
  border: 1px solid var(--border2);
  border-radius: 4px;
  overflow: hidden;
  margin: 16px 0;
}
.m2-code-header {
  padding: 8px 16px;
  background: var(--surface2);
  border-bottom: 1px solid var(--border);
  font-family: 'IBM Plex Mono', monospace;
  font-size: 10px;
  color: var(--muted);
  letter-spacing: 1px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.m2-code-lang {
  background: var(--border2);
  padding: 2px 8px;
  border-radius: 2px;
  font-size: 9px;
  color: var(--gold);
}
.m2-code-body {
  padding: 18px 20px;
  font-family: 'IBM Plex Mono', monospace;
  font-size: 11.5px;
  line-height: 1.8;
  color: #a89060;
  overflow-x: auto;
  white-space: pre;
  background: #0a0905;
}
.m2-kw  { color: #c9853a; }
.m2-cls { color: #e8c87a; }
.m2-fn  { color: #8fbf8f; }
.m2-cm  { color: #3d3018; }
.m2-str { color: #c87a5a; }
.m2-num { color: #7a9abf; }
.m2-ann { color: #8f7abf; }

/* when-to-use */
.m2-when-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin: 16px 0;
}
.m2-when-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 14px 16px;
}
.m2-when-card h4 {
  font-size: 11px;
  font-family: 'IBM Plex Mono', monospace;
  letter-spacing: 1px;
  margin-bottom: 8px;
  text-transform: uppercase;
  color: var(--text);
}
.m2-when-card.yes h4 { color: var(--sage); }
.m2-when-card.no  h4 { color: var(--rust); }
.m2-when-list { list-style: none; padding: 0; margin: 0; }
.m2-when-list li {
  font-size: 12px;
  color: var(--muted);
  padding: 3px 0 3px 16px;
  position: relative;
  line-height: 1.5;
  margin: 0;
}
.m2-when-card.yes .m2-when-list li::before { content: '✓'; position: absolute; left: 0; color: var(--sage); }
.m2-when-card.no  .m2-when-list li::before { content: '✗'; position: absolute; left: 0; color: var(--rust); }

.m2-tip-box {
  margin-top: 16px;
  padding: 14px 16px;
  background: rgba(240,165,0,0.05);
  border: 1px solid rgba(240,165,0,0.15);
  border-radius: 4px;
  font-size: 13px;
  color: var(--gold);
  line-height: 1.6;
}
.m2-tip-box::before { content: '⚡ '; font-weight: 700; }

/* Comparison table */
.m2-comp-table {
  width: 100%;
  border-collapse: collapse;
  margin: 20px 0;
  font-size: 12px;
}
.m2-comp-table th {
  background: var(--surface2);
  padding: 10px 14px;
  text-align: left;
  font-family: 'IBM Plex Mono', monospace;
  font-size: 10px;
  letter-spacing: 1px;
  color: var(--gold);
  border-bottom: 1px solid var(--border2);
  font-weight: 400;
  border-top: none;
  border-right: none;
  border-left: none;
}
.m2-comp-table td {
  padding: 10px 14px;
  border-bottom: 1px solid var(--border);
  color: var(--muted);
  vertical-align: top;
  line-height: 1.5;
  border-top: none;
  border-right: none;
  border-left: none;
}
.m2-comp-table td:first-child { color: var(--text); font-weight: 500; }
.m2-comp-table tr:hover td { background: rgba(240,165,0,0.02); }

/* ATM PROJECT */
.m2-atm-layout {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 10px;
  margin: 24px 0;
}
.m2-atm-pattern {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 16px;
  text-align: center;
  transition: all 0.2s;
}
.m2-atm-pattern:hover { border-color: var(--border2); transform: translateY(-2px); }
.m2-atm-p-icon { font-size: 28px; margin-bottom: 8px; line-height: 1; }
.m2-atm-p-name { font-size: 11px; font-weight: 600; margin-bottom: 4px; color: var(--bright); }
.m2-atm-p-use { font-size: 10px; font-family: 'IBM Plex Mono', monospace; color: var(--muted); line-height: 1.4; }

/* Tasks */
.m2-tasks-list { display: flex; flex-direction: column; gap: 14px; }
.m2-task-item {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 4px;
  overflow: hidden;
}
.m2-task-hd {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 18px 20px;
  cursor: pointer;
  transition: background 0.15s;
}
.m2-task-hd:hover { background: var(--surface2); }
.m2-t-num {
  font-family: 'Barlow Condensed', sans-serif;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 1px;
  padding: 4px 10px;
  border-radius: 2px;
  flex-shrink: 0;
}
.m2-t-label { font-size: 14px; font-weight: 600; color: var(--bright); flex: 1; margin: 0; }
.m2-t-meta { font-family: 'IBM Plex Mono', monospace; font-size: 10px; color: var(--muted); white-space: nowrap; }
.m2-t-arr { color: var(--muted); transition: transform 0.2s; font-size: 18px; line-height: 1; }
.m2-t-arr.open { transform: rotate(90deg); }
.m2-task-bd {
  padding: 0 20px 20px;
  display: none;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.7;
}
.m2-task-bd.open { display: block; }
.m2-task-bd pre {
  background: #0a0905;
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 14px 16px;
  font-family: 'IBM Plex Mono', monospace;
  font-size: 11px;
  line-height: 1.7;
  overflow-x: auto;
  margin: 10px 0;
  color: #a89060;
  white-space: pre;
}

/* Checklist */
.m2-chk-list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}
.m2-chk {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 13px 15px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 4px;
  cursor: pointer;
  transition: all 0.15s;
}
.m2-chk:hover { border-color: var(--border2); }
.m2-chk.done { border-color: rgba(106,143,106,0.4); background: rgba(106,143,106,0.04); }
.m2-chk-box {
  width: 16px; height: 16px;
  border: 1px solid var(--border2);
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 10px;
  margin-top: 2px;
  transition: all 0.15s;
  border-radius: 2px;
}
.m2-chk.done .m2-chk-box { background: var(--sage); border-color: var(--sage); color: #fff; }
.m2-chk-lbl { font-size: 12px; color: var(--muted); line-height: 1.5; }
.m2-chk.done .m2-chk-lbl { color: var(--sage); text-decoration: line-through; }

.m2-prog-row {
  display: flex;
  justify-content: space-between;
  font-family: 'IBM Plex Mono', monospace;
  font-size: 11px;
  color: var(--muted);
  margin-bottom: 8px;
}
.m2-prog-track {
  height: 3px;
  background: var(--border2);
  margin-bottom: 24px;
  border-radius: 2px;
  overflow: hidden;
}
.m2-prog-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--gold), var(--rust));
  border-radius: 2px;
  transition: width 0.3s;
  width: 0%;
}

/* SOLID badge */
.m2-solid-badge {
  display: inline-block;
  font-family: 'IBM Plex Mono', monospace;
  font-size: 10px;
  padding: 3px 8px;
  border-radius: 2px;
  margin: 2px;
}

/* Bottom Nav */
.m2-bottom-nav {
  display: flex;
  gap: 1rem;
  margin-top: 2rem;
  flex-wrap: wrap;
}
.m2-bottom-nav a {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.7rem 1.4rem;
  border-radius: 8px;
  text-decoration: none;
  font-weight: 600;
  font-size: 0.9rem;
  transition: transform 0.2s, background 0.15s;
}
.m2-bottom-nav a:hover {
  transform: translateY(-2px);
}
.m2-btn-primary {
  background: rgba(240,165,0,0.1);
  border: 1px solid rgba(240,165,0,0.3);
  color: var(--gold);
}
.m2-btn-primary:hover {
  background: rgba(240,165,0,0.15);
}
.m2-btn-secondary {
  background: rgba(30,42,64,0.6);
  border: 1px solid #263450;
  color: #d4deff;
}
.m2-btn-secondary:hover {
  background: rgba(30,42,64,0.8);
}

@media (max-width: 900px) {
  .m2-header { padding: 32px 24px 28px; }
  .m2-content { padding: 32px 24px; }
  .m2-overview-grid { grid-template-columns: 1fr 1fr; }
  .m2-atm-layout { grid-template-columns: 1fr 1fr; }
  .m2-when-grid { grid-template-columns: 1fr; }
  .m2-chk-list { grid-template-columns: 1fr; }
}