/* =========================================================================
   Utility Data Engineer — shared styles
   Mobile-first, touch-friendly, works from file://
   ========================================================================= */

:root {
  --c-bg: #0f1419;
  --c-surface: #1a2028;
  --c-surface-hi: #232b35;
  --c-border: #2d3847;
  --c-text: #e6edf3;
  --c-text-dim: #9aa4b2;
  --c-text-faint: #6c7888;

  --c-accent: #29b5e8;         /* Snowflake cyan */
  --c-accent-hi: #4cc7f0;
  --c-amber: #ffb400;           /* AWS */
  --c-green: #4cd964;
  --c-red: #ff3b30;
  --c-purple: #bf5af2;

  --c-strong: #4cd964;
  --c-partial: #ffb400;
  --c-gap: #ff453a;

  --radius: 12px;
  --radius-sm: 8px;
  --radius-lg: 18px;

  --shadow: 0 2px 8px rgba(0,0,0,.35);
  --shadow-hi: 0 8px 24px rgba(0,0,0,.45);

  --font-body: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-mono: "SF Mono", Menlo, Consolas, monospace;

  --tap: 44px;
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--c-bg);
  color: var(--c-text);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  min-height: 100vh;
  padding-bottom: 80px; /* room for floating notepad */
}

/* ====== Top navigation ====== */
.site-nav {
  background: var(--c-surface);
  border-bottom: 1px solid var(--c-border);
  padding: 10px 16px;
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  overflow-x: auto;
  white-space: nowrap;
  -webkit-overflow-scrolling: touch;
  position: sticky;
  top: 0;
  z-index: 20;
}
.site-nav a {
  color: var(--c-accent);
  text-decoration: none;
  padding: 6px 8px;
  border-radius: var(--radius-sm);
  min-height: var(--tap);
  display: inline-flex;
  align-items: center;
}
.site-nav a:active { background: var(--c-surface-hi); }
.site-nav .nav-sep { color: var(--c-text-faint); }
.site-nav .nav-current { color: var(--c-text-dim); padding: 6px 8px; }

/* ====== Layout ====== */
main, .container {
  max-width: 900px;
  margin: 0 auto;
  padding: 20px 16px 40px;
}
.container-wide { max-width: 1200px; }

/* ====== Headings ====== */
h1, h2, h3, h4 { line-height: 1.25; margin-top: 1.6em; margin-bottom: .6em; }
h1 { font-size: 28px; }
h2 { font-size: 22px; border-bottom: 1px solid var(--c-border); padding-bottom: 8px; }
h3 { font-size: 18px; color: var(--c-accent-hi); }
h4 { font-size: 16px; color: var(--c-text-dim); text-transform: uppercase; letter-spacing: .08em; }

@media (min-width: 700px) {
  h1 { font-size: 36px; }
  h2 { font-size: 26px; }
  h3 { font-size: 20px; }
}

/* ====== Text helpers ====== */
p { margin: 0 0 1em; }
.lede { font-size: 18px; color: var(--c-text-dim); }
.muted { color: var(--c-text-dim); }
.faint { color: var(--c-text-faint); font-size: 14px; }
strong { color: #fff; }
em { color: var(--c-accent-hi); font-style: normal; }

/* ====== Code ====== */
code, kbd {
  font-family: var(--font-mono);
  font-size: 0.92em;
  background: var(--c-surface-hi);
  padding: 2px 6px;
  border-radius: 4px;
  color: var(--c-amber);
}
pre {
  background: #0b0e13;
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  padding: 14px 16px;
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: 14px;
  line-height: 1.55;
  -webkit-overflow-scrolling: touch;
}
pre code { background: none; padding: 0; color: var(--c-text); }

/* SQL-ish highlighting */
.tok-kw { color: #ff7b72; font-weight: 600; }
.tok-str { color: #a5d6ff; }
.tok-num { color: #ffa657; }
.tok-com { color: var(--c-text-faint); font-style: italic; }
.tok-fn { color: #d2a8ff; }

/* ====== Cards ====== */
.card {
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  padding: 18px;
  margin-bottom: 16px;
}
.card-hi {
  background: linear-gradient(135deg, #1a2028, #1f2a3a);
  border-color: var(--c-accent);
}

/* ====== JD Block (the verbatim JD quote) ====== */
.jd-block {
  background: #101822;
  border-left: 4px solid var(--c-amber);
  padding: 14px 16px;
  border-radius: var(--radius-sm);
  font-size: 15px;
  margin: 18px 0;
}
.jd-block .jd-label {
  color: var(--c-amber);
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .1em;
  display: block;
  margin-bottom: 6px;
}
.jd-block em { color: #fff; font-style: italic; }

/* ====== Coverage pills ====== */
.pill {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .06em;
}
.pill-strong  { background: rgba(76,217,100,.15);  color: var(--c-strong); border: 1px solid var(--c-strong); }
.pill-partial { background: rgba(255,180,0,.15);  color: var(--c-partial); border: 1px solid var(--c-partial); }
.pill-gap     { background: rgba(255,69,58,.15);  color: var(--c-gap); border: 1px solid var(--c-gap); }
.pill-crash   { background: rgba(255,69,58,.18);  color: #ff7469; border: 1px solid rgba(255,69,58,.4); }
.pill-deep    { background: rgba(41,181,232,.15); color: var(--c-accent); border: 1px solid rgba(41,181,232,.4); }

/* ====== Buttons ====== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 10px 18px;
  min-height: var(--tap);
  background: var(--c-accent);
  color: #0a1218;
  border: none;
  border-radius: var(--radius-sm);
  font-family: inherit;
  font-size: 15px;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  transition: transform .08s ease;
}
.btn:active { transform: scale(.97); }
.btn-outline {
  background: transparent;
  color: var(--c-accent);
  border: 1px solid var(--c-accent);
}
.btn-ghost {
  background: var(--c-surface-hi);
  color: var(--c-text);
}
.btn-sm { padding: 6px 12px; min-height: 36px; font-size: 13px; }

/* ====== Progress ====== */
.progress-bar {
  height: 10px;
  background: var(--c-surface-hi);
  border-radius: 999px;
  overflow: hidden;
  position: relative;
}
.progress-bar-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--c-accent), var(--c-green));
  transition: width .4s ease;
}
.progress-label {
  display: flex;
  justify-content: space-between;
  font-size: 13px;
  color: var(--c-text-dim);
  margin-bottom: 6px;
}

/* ====== Alignment infographic ====== */
.align-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}
@media (min-width: 700px) {
  .align-grid { grid-template-columns: repeat(2, 1fr); }
}
.align-item {
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-sm);
  padding: 14px;
  border-left-width: 4px;
}
.align-strong  { border-left-color: var(--c-strong); }
.align-partial { border-left-color: var(--c-partial); }
.align-gap     { border-left-color: var(--c-gap); }
.align-item h4 {
  margin: 0 0 6px;
  color: var(--c-text);
  font-size: 14px;
  letter-spacing: 0;
  text-transform: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 8px;
}
.align-item .align-evidence { font-size: 13px; color: var(--c-text-dim); margin: 4px 0 0; }
.align-item .align-action { font-size: 13px; color: var(--c-accent-hi); margin-top: 6px; }

/* ====== Module cards (dashboard) ====== */
.module-list {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}
@media (min-width: 700px) {
  .module-list { grid-template-columns: repeat(2, 1fr); }
}
.module-card {
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  padding: 18px;
  text-decoration: none;
  color: var(--c-text);
  display: block;
  transition: border-color .15s ease;
}
.module-card:active { border-color: var(--c-accent); }
.module-card-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 10px;
  margin-bottom: 8px;
}
.module-card-title { font-weight: 700; font-size: 17px; }
.module-card-sub { color: var(--c-text-dim); font-size: 13px; margin-top: 4px; }
.module-card-stats {
  display: flex;
  gap: 12px;
  font-size: 12px;
  color: var(--c-text-faint);
  margin-top: 10px;
}

/* ====== Mode toggle ====== */
.mode-toggle {
  display: inline-flex;
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: 999px;
  padding: 4px;
  gap: 2px;
}
.mode-toggle button {
  background: transparent;
  color: var(--c-text-dim);
  border: none;
  padding: 8px 16px;
  border-radius: 999px;
  font-family: inherit;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  min-height: 36px;
}
.mode-toggle button.active {
  background: var(--c-accent);
  color: #0a1218;
}

/* ====== Tables ====== */
table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
  margin: 1em 0;
}
th, td {
  padding: 10px 12px;
  border-bottom: 1px solid var(--c-border);
  text-align: left;
}
th { color: var(--c-text-dim); font-weight: 600; font-size: 12px; text-transform: uppercase; letter-spacing: .06em; }

/* ====== Callouts ====== */
.callout {
  border-left: 4px solid var(--c-accent);
  background: rgba(41,181,232,.08);
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  margin: 16px 0;
}
.callout-warn   { border-color: var(--c-amber);  background: rgba(255,180,0,.08); }
.callout-danger { border-color: var(--c-red);    background: rgba(255,69,58,.08); }
.callout-ok     { border-color: var(--c-green);  background: rgba(76,217,100,.08); }
.callout h4 { margin-top: 0; color: var(--c-text); }

/* ====== Prev/Next nav ====== */
.pagenav {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  margin-top: 40px;
  padding-top: 20px;
  border-top: 1px solid var(--c-border);
}
.pagenav a {
  flex: 1;
  padding: 12px 16px;
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-sm);
  color: var(--c-accent);
  text-decoration: none;
  min-height: var(--tap);
  display: flex;
  align-items: center;
}
.pagenav a.pagenav-next { justify-content: flex-end; text-align: right; }
.pagenav a.disabled { opacity: .3; pointer-events: none; }

/* ====== Floating notepad button ====== */
.notepad-fab {
  position: fixed;
  bottom: 20px;
  right: 20px;
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: var(--c-accent);
  color: #0a1218;
  border: none;
  box-shadow: var(--shadow-hi);
  font-size: 24px;
  cursor: pointer;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: center;
}
.notepad-fab:active { transform: scale(.93); }

.notepad-panel {
  position: fixed;
  bottom: 0;
  right: 0;
  left: 0;
  max-height: 75vh;
  background: var(--c-surface);
  border-top: 1px solid var(--c-border);
  box-shadow: var(--shadow-hi);
  z-index: 101;
  display: none;
  flex-direction: column;
  border-top-left-radius: var(--radius-lg);
  border-top-right-radius: var(--radius-lg);
  animation: slideUp .22s ease;
}
@keyframes slideUp { from { transform: translateY(100%); } to { transform: translateY(0); } }
.notepad-panel.open { display: flex; }
@media (min-width: 700px) {
  .notepad-panel {
    left: auto;
    width: 420px;
    max-height: 70vh;
    bottom: 90px;
    right: 20px;
    border-radius: var(--radius-lg);
  }
}
.notepad-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 16px;
  border-bottom: 1px solid var(--c-border);
}
.notepad-head strong { font-size: 15px; }
.notepad-body { padding: 12px 16px; overflow-y: auto; flex: 1; }
.notepad-entry {
  background: var(--c-bg);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-sm);
  padding: 10px 12px;
  margin-bottom: 8px;
  font-size: 14px;
  position: relative;
}
.notepad-entry-meta {
  font-size: 11px;
  color: var(--c-text-faint);
  display: flex;
  gap: 8px;
  margin-bottom: 4px;
}
.notepad-entry-del {
  position: absolute; top: 8px; right: 8px;
  background: transparent; border: none; color: var(--c-text-faint);
  cursor: pointer; font-size: 16px; line-height: 1;
}
.notepad-compose { border-top: 1px solid var(--c-border); padding: 10px; }
.notepad-compose textarea {
  width: 100%; min-height: 60px;
  background: var(--c-bg);
  border: 1px solid var(--c-border);
  color: var(--c-text);
  border-radius: var(--radius-sm);
  padding: 8px 10px;
  font-family: inherit;
  font-size: 14px;
  resize: vertical;
}
.notepad-compose-row {
  display: flex; gap: 8px; margin-top: 8px; align-items: center;
}
.notepad-compose-row select {
  flex: 1;
  background: var(--c-bg);
  border: 1px solid var(--c-border);
  color: var(--c-text);
  border-radius: var(--radius-sm);
  padding: 6px 8px;
  font-family: inherit;
  font-size: 13px;
  min-height: 36px;
}

/* ====== Forms ====== */
input[type="text"], input[type="search"], textarea, select {
  background: var(--c-bg);
  color: var(--c-text);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-sm);
  padding: 10px 12px;
  font-family: inherit;
  font-size: 15px;
  min-height: var(--tap);
  width: 100%;
  box-sizing: border-box;
}
input:focus, textarea:focus, select:focus {
  outline: none;
  border-color: var(--c-accent);
}

/* ====== Flashcard ====== */
.flashcard {
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-lg);
  padding: 32px 20px;
  min-height: 240px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  cursor: pointer;
  user-select: none;
  transition: transform .2s ease;
}
.flashcard-front { font-size: 22px; font-weight: 600; }
.flashcard-back { font-size: 17px; color: var(--c-text-dim); line-height: 1.5; }
.flashcard-hint { position: absolute; bottom: 12px; left: 0; right: 0; color: var(--c-text-faint); font-size: 12px; }
.flashcard-deck {
  position: relative;
  max-width: 560px;
  margin: 0 auto;
}
.flashcard-actions {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
  margin-top: 16px;
}

/* ====== Crash/Deep visibility ====== */
body[data-mode="crash"] .only-deep { display: none; }
body[data-mode="deep"] .only-crash { display: none; }

/* ====== Misc ====== */
hr { border: none; border-top: 1px solid var(--c-border); margin: 2em 0; }
a { color: var(--c-accent); }
a:hover { color: var(--c-accent-hi); }

.chip-row { display: flex; flex-wrap: wrap; gap: 6px; margin: 8px 0; }

.tag {
  display: inline-block;
  background: var(--c-surface-hi);
  color: var(--c-text-dim);
  font-size: 11px;
  padding: 2px 8px;
  border-radius: 999px;
  text-transform: uppercase;
  letter-spacing: .06em;
}

ul.checklist { list-style: none; padding-left: 0; }
ul.checklist li {
  padding: 8px 0 8px 32px;
  position: relative;
  border-bottom: 1px dashed var(--c-border);
}
ul.checklist li::before {
  content: "☐";
  position: absolute;
  left: 8px;
  color: var(--c-text-faint);
  font-size: 18px;
}
ul.checklist li.done::before { content: "☑"; color: var(--c-green); }
ul.checklist li.done { color: var(--c-text-dim); text-decoration: line-through; }

/* hero stat block */
.stat-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  margin: 16px 0;
}
.stat {
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-sm);
  padding: 12px;
  text-align: center;
}
.stat-num { font-size: 24px; font-weight: 700; color: var(--c-accent-hi); }
.stat-lbl { font-size: 11px; color: var(--c-text-faint); text-transform: uppercase; letter-spacing: .08em; }