/* devxkapoor-learning — design system v2
   Direction: systems boot-log / process table — but warm, readable, welcoming.
   Mono (IBM Plex Mono) for structure/status/labels, Inter for reading prose. */

@import url('https://fonts.googleapis.com/css2?family=IBM+Plex+Mono:wght@400;500;600;700&family=Inter:wght@400;500;600;700;800&display=swap');

:root {
  --bg: #0a0c10;
  --panel: #14181f;
  --panel-raised: #1a1f28;
  --border: #262d3a;
  --border-bright: #3a4356;
  --text: #eef0f4;
  --text-dim: #8b93a3;
  --text-dimmer: #565f70;
  --accent: #ffb454;
  --accent-soft: #ffcb82;
  --accent-glow: rgba(255,180,84,0.18);
  --accent-dim: #6b5530;
  --done: #7ee091;
  --progress: #ffb454;
  --stalled: #ff8080;
  --notstarted: #414a5c;
  --mono: 'IBM Plex Mono', ui-monospace, 'SF Mono', Consolas, monospace;
  --sans: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --radius: 8px;
  --radius-sm: 5px;
}

html[data-theme="light"] {
  --bg: #fbf8f2;
  --panel: #ffffff;
  --panel-raised: #f4efe4;
  --border: #e6ddc9;
  --border-bright: #d4c8a8;
  --text: #26221a;
  --text-dim: #6f6656;
  --text-dimmer: #a49a83;
  --accent: #c9791a;
  --accent-soft: #a8620f;
  --accent-glow: rgba(201,121,26,0.14);
  --accent-dim: #f0dcb8;
  --done: #2f9e4f;
  --progress: #c9791a;
  --stalled: #d1483f;
  --notstarted: #cfc4a8;
}

* { box-sizing: border-box; }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.001ms !important; transition-duration: 0.001ms !important; }
}

html { -webkit-font-smoothing: antialiased; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  line-height: 1.7;
  font-size: 17px;
  transition: background 0.2s, color 0.2s;
}

::selection { background: var(--accent-glow); color: var(--text); }

.wrap {
  max-width: 1140px;
  margin: 0 auto;
  padding: 36px 28px 110px;
}

/* ---------- Header ---------- */

header.site-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 28px;
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  background: color-mix(in srgb, var(--bg) 92%, transparent);
  backdrop-filter: blur(10px);
  z-index: 10;
  font-family: var(--mono);
}

header.site-header .brand {
  font-size: 14.5px;
  color: var(--text-dim);
  letter-spacing: 0.01em;
  text-decoration: none;
  transition: color 0.15s;
}
header.site-header .brand:hover { color: var(--text); }
header.site-header .brand strong { color: var(--accent); font-weight: 600; }
header.site-header .brand::before { content: "$ "; color: var(--text-dimmer); }

header.site-header .right { display: flex; align-items: center; gap: 22px; }

header.site-header nav a {
  color: var(--text-dim);
  text-decoration: none;
  margin-left: 22px;
  font-size: 13px;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  padding-bottom: 3px;
  border-bottom: 1px solid transparent;
}
header.site-header nav a:hover { color: var(--text); }
header.site-header nav a.active { color: var(--accent); border-bottom-color: var(--accent); }

.theme-toggle {
  background: var(--panel);
  border: 1px solid var(--border);
  color: var(--text-dim);
  width: 32px;
  height: 32px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-size: 15px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: border-color 0.15s, color 0.15s;
}
.theme-toggle:hover { border-color: var(--accent); color: var(--accent); }

/* ---------- Typography ---------- */

h1 {
  font-family: var(--mono);
  font-size: 34px;
  font-weight: 600;
  margin: 0 0 12px;
  letter-spacing: -0.015em;
  background: linear-gradient(90deg, var(--text), var(--accent-soft) 140%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
h2 {
  font-family: var(--mono);
  font-size: 14px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-dim);
  margin: 46px 0 16px;
  display: flex;
  align-items: center;
  gap: 12px;
}
h2::after {
  content: "";
  flex: 1;
  height: 1px;
  background: var(--border);
}
p.lede { color: var(--text-dim); margin-top: 0; max-width: 660px; font-size: 17px; }

/* ---------- Boot sequence (signature element) ---------- */

#boot-sequence {
  font-family: var(--mono);
  font-size: 14px;
  color: var(--text-dim);
  padding: 28px;
  min-height: 100px;
}
#boot-sequence .line { opacity: 0; animation: bootLineIn 0.25s ease forwards; }
#boot-sequence .line.ok::before { content: "  OK  "; color: var(--done); font-weight: 600; }
#boot-sequence .line.info::before { content: " ---- "; color: var(--text-dimmer); }
#boot-sequence .cursor {
  display: inline-block;
  width: 8px; height: 15px;
  background: var(--accent);
  animation: blink 1s step-end infinite;
  vertical-align: text-bottom;
  margin-left: 2px;
}
@keyframes bootLineIn { to { opacity: 1; } }
@keyframes blink { 50% { opacity: 0; } }

/* ---------- Progress bar (replaces stat boxes) ---------- */

.boot-progress {
  font-family: var(--mono);
  font-size: 13px;
  color: var(--text-dim);
  margin: 22px 0 30px;
}
.boot-progress .track {
  height: 8px;
  background: var(--panel-raised);
  border: 1px solid var(--border);
  border-radius: 20px;
  overflow: hidden;
  margin-top: 10px;
}
.boot-progress .fill {
  height: 100%;
  background: linear-gradient(90deg, var(--accent-dim), var(--accent));
  transition: width 0.5s ease;
  box-shadow: 0 0 12px var(--accent-glow);
}
.boot-progress .counts span { margin-right: 20px; }
.boot-progress .counts .n { color: var(--text); font-weight: 600; font-size: 14px; }

/* ---------- Search box ---------- */

input.search-box {
  width: 100%;
  padding: 14px 16px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--panel);
  color: var(--text);
  font-family: var(--mono);
  font-size: 14.5px;
  margin-bottom: 28px;
}
input.search-box::placeholder { color: var(--text-dimmer); }
input.search-box:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-glow); }
input.search-box:focus-visible { outline: none; }

/* ---------- Process table (topic list) ---------- */

.proc-table {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--panel);
}
.proc-row {
  display: grid;
  grid-template-columns: 52px 1fr 140px;
  align-items: center;
  padding: 15px 18px;
  text-decoration: none;
  color: var(--text);
  border-bottom: 1px solid var(--border);
  transition: background 0.12s, padding-left 0.12s;
}
.proc-row:last-child { border-bottom: none; }
.proc-row:hover { background: var(--panel-raised); padding-left: 22px; }
.proc-row:focus-visible { outline: 2px solid var(--accent); outline-offset: -2px; }

.proc-idx {
  font-family: var(--mono);
  font-size: 13px;
  color: var(--text-dimmer);
}
.proc-name {
  font-family: var(--mono);
  font-size: 15px;
}
.proc-state {
  font-family: var(--mono);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  justify-self: end;
  display: flex;
  align-items: center;
  gap: 8px;
}
.dot { width: 8px; height: 8px; border-radius: 50%; flex-shrink: 0; }
.dot.done { background: var(--done); box-shadow: 0 0 7px var(--done); }
.dot.in-progress { background: var(--progress); box-shadow: 0 0 7px var(--progress); }
.dot.stalled { background: var(--stalled); box-shadow: 0 0 7px var(--stalled); }
.dot.not-started { background: var(--notstarted); }
.proc-state.done { color: var(--done); }
.proc-state.in-progress { color: var(--progress); }
.proc-state.stalled { color: var(--stalled); }
.proc-state.not-started { color: var(--text-dimmer); }

/* ---------- Tabs (topic pack) ---------- */

.tabs { display: flex; gap: 4px; margin-bottom: 28px; border-bottom: 1px solid var(--border); }
.tab-btn {
  background: transparent;
  border: none;
  color: var(--text-dim);
  padding: 12px 18px;
  font-family: var(--mono);
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  cursor: pointer;
  border-bottom: 2px solid transparent;
  margin-bottom: -1px;
  transition: color 0.15s;
}
.tab-btn:hover { color: var(--text); }
.tab-btn.active { color: var(--accent); border-bottom-color: var(--accent); }

/* ---------- Recall & elaboration cards ---------- */

.card-list { display: flex; flex-direction: column; gap: 12px; }
.rc-card, .el-card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px 22px;
  transition: border-color 0.15s;
}
.rc-card { cursor: pointer; }
.rc-card:hover { border-color: var(--accent-dim); }
.rc-card .topic-tag, .el-card .topic-tag {
  font-family: var(--mono);
  font-size: 11.5px;
  text-transform: uppercase;
  color: var(--accent);
  letter-spacing: 0.05em;
}
.rc-card .q { font-weight: 600; margin: 10px 0 0; font-size: 16px; }
.rc-card .a {
  color: var(--text-dim);
  font-size: 15px;
  margin-top: 12px;
  padding-top: 12px;
  border-top: 1px dashed var(--border);
  display: none;
}
.rc-card.revealed .a { display: block; }

/* ---------- Prose (elaboration content) ---------- */

.prose { max-width: 760px; font-size: 17px; }
.prose h3 { font-family: var(--mono); font-size: 17px; margin: 32px 0 12px; color: var(--text); }
.prose p { margin: 0 0 16px; color: var(--text); }
.prose code {
  font-family: var(--mono);
  background: var(--panel-raised);
  padding: 2px 7px;
  border-radius: 4px;
  font-size: 0.88em;
  border: 1px solid var(--border);
}
.prose pre {
  font-family: var(--mono);
  background: var(--panel-raised);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 16px;
  overflow-x: auto;
  font-size: 14px;
}

/* ---------- Misc ---------- */

.empty-note {
  color: var(--text-dim);
  font-family: var(--mono);
  font-size: 14px;
  padding: 24px;
  background: var(--panel);
  border: 1px dashed var(--border);
  border-radius: var(--radius);
  text-align: center;
}

footer.site-footer {
  text-align: center;
  color: var(--text-dimmer);
  font-family: var(--mono);
  font-size: 12px;
  padding: 56px 20px 24px;
}

a { color: var(--accent); }

/* ---------- Responsive ---------- */

@media (max-width: 720px) {
  body { font-size: 15.5px; }

  .wrap { padding: 24px 16px 90px; }

  header.site-header {
    padding: 12px 16px;
    flex-wrap: wrap;
    gap: 10px;
  }
  header.site-header .brand { font-size: 13px; }
  header.site-header .right { gap: 12px; }
  header.site-header nav a {
    margin-left: 12px;
    font-size: 11.5px;
  }

  h1 {
    font-size: 24px;
    line-height: 1.3;
  }
  h2 { font-size: 12px; margin: 34px 0 12px; }
  p.lede { font-size: 15px; }

  #boot-sequence { padding: 18px 16px; font-size: 12.5px; }

  .boot-progress .counts { display: flex; flex-wrap: wrap; gap: 4px 14px; }
  .boot-progress .counts span { margin-right: 0; }

  /* Process table collapses to two lines per row instead of a tight 3-col grid */
  .proc-row {
    grid-template-columns: 32px 1fr;
    grid-template-areas: "idx name" "state state";
    row-gap: 6px;
    padding: 13px 14px;
  }
  .proc-row:hover { padding-left: 14px; }
  .proc-idx { grid-area: idx; }
  .proc-name { grid-area: name; font-size: 14px; }
  .proc-state { grid-area: state; justify-self: start; margin-left: 32px; }

  .tabs { overflow-x: auto; -webkit-overflow-scrolling: touch; }
  .tab-btn { padding: 10px 13px; font-size: 11.5px; white-space: nowrap; }

  .rc-card, .el-card { padding: 15px 16px; }
  .rc-card .q { font-size: 15px; }

  .prose { font-size: 15.5px; }
}

@media (max-width: 420px) {
  header.site-header nav a { margin-left: 8px; font-size: 10.5px; }
  h1 { font-size: 21px; }
}