/* ============================================================
   Growth — Frutiger Aero / Windows Vista Explorer
   Single explorer-style window with sidebar navigation.
   Self-contained — does NOT inherit /assets/css/style.css.
   ============================================================ */

* { margin: 0; padding: 0; box-sizing: border-box; }

:root {
  --aero-text: #1a3d56;
  --aero-text-soft: #4d6b80;
  --aero-link: #0f63b0;
  --aero-link-hover: #1183dd;
  --aero-blue: #1c7ec4;
  --aero-blue-deep: #093e6e;
  --aero-blue-pale: #cfe6f7;
  --aero-green: #7bc24b;
  --aero-green-deep: #3e7a1f;
  --aero-green-pale: #d6edc8;

  --radius: 14px;
  --radius-sm: 8px;
  --radius-pill: 999px;
}

html, body { height: 100%; }

body {
  font-family: "Segoe UI", "Segoe UI Web (West European)", -apple-system, BlinkMacSystemFont, "Helvetica Neue", Arial, sans-serif;
  font-size: 13px;
  color: var(--aero-text);
  background:
    radial-gradient(ellipse at 18% 12%, rgba(255, 255, 255, 0.55) 0%, transparent 40%),
    radial-gradient(ellipse at 82% 20%, rgba(180, 230, 200, 0.5) 0%, transparent 45%),
    radial-gradient(ellipse at 50% 100%, rgba(200, 235, 170, 0.6) 0%, transparent 55%),
    linear-gradient(160deg, #7fc3da 0%, #9ed8d0 35%, #c2e6a8 70%, #9ec76a 100%);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow: hidden;
  position: relative;
}

a { color: var(--aero-link); text-decoration: none; }
a:hover { color: var(--aero-link-hover); text-decoration: underline; }

/* ===== Aero background (sky / aurora / bokeh / grass) ===== */
.aero-sky {
  position: fixed;
  inset: 0;
  pointer-events: none;
  overflow: hidden;
  z-index: 0;
}
.aero-aurora {
  position: absolute;
  border-radius: 50%;
  filter: blur(90px);
  opacity: 0.55;
  animation: aurora-drift 22s ease-in-out infinite alternate;
}
.aurora-1 {
  width: 70vw; height: 70vw;
  top: -25vw; left: -15vw;
  background: radial-gradient(closest-side, rgba(255, 255, 255, 0.7), rgba(180, 220, 245, 0.35), transparent 70%);
}
.aurora-2 {
  width: 60vw; height: 60vw;
  top: 0vh; right: -25vw;
  background: radial-gradient(closest-side, rgba(180, 230, 200, 0.65), rgba(120, 200, 160, 0.3), transparent 70%);
  animation-duration: 28s;
}
.aurora-3 {
  width: 75vw; height: 75vw;
  bottom: -20vw; left: 15vw;
  background: radial-gradient(closest-side, rgba(220, 240, 170, 0.55), rgba(160, 200, 90, 0.3), transparent 70%);
  animation-duration: 36s;
}
@keyframes aurora-drift {
  0%   { transform: translate(0, 0) scale(1); }
  100% { transform: translate(5vw, -3vh) scale(1.1); }
}

.aero-bokeh span {
  position: absolute;
  border-radius: 50%;
  background: radial-gradient(circle at 30% 30%, rgba(255, 255, 255, 0.95), rgba(255, 255, 255, 0.25) 60%, transparent 75%);
  box-shadow: 0 0 18px rgba(255, 255, 255, 0.55);
  animation: bokeh-float 14s ease-in-out infinite;
}
.aero-bokeh span:nth-child(1) { top: 10%; left: 7%;  width: 18px; height: 18px; animation-delay: 0s; }
.aero-bokeh span:nth-child(2) { top: 20%; left: 88%; width: 12px; height: 12px; animation-delay: -2s; }
.aero-bokeh span:nth-child(3) { top: 60%; left: 6%;  width: 22px; height: 22px; animation-delay: -4s; }
.aero-bokeh span:nth-child(4) { top: 38%; left: 92%; width: 14px; height: 14px; animation-delay: -6s; }
.aero-bokeh span:nth-child(5) { top: 78%; left: 18%; width: 10px; height: 10px; animation-delay: -8s; }
.aero-bokeh span:nth-child(6) { top: 86%; left: 84%; width: 16px; height: 16px; animation-delay: -10s; }
.aero-bokeh span:nth-child(7) { top: 50%; left: 50%; width: 12px; height: 12px; animation-delay: -12s; }
.aero-bokeh span:nth-child(8) { top: 6%;  left: 50%; width: 8px;  height: 8px;  animation-delay: -1s; }
@keyframes bokeh-float {
  0%   { transform: translateY(0) scale(1);   opacity: 0.85; }
  50%  { transform: translateY(-18px) scale(1.1); opacity: 1; }
  100% { transform: translateY(0) scale(1);   opacity: 0.85; }
}

.aero-grass {
  position: absolute;
  left: 0; right: 0; bottom: 0;
  height: 140px;
  background:
    radial-gradient(ellipse at 15% 110%, rgba(100, 160, 60, 0.55), transparent 60%),
    radial-gradient(ellipse at 55% 110%, rgba(130, 190, 80, 0.55), transparent 65%),
    radial-gradient(ellipse at 90% 110%, rgba(80, 140, 50, 0.55), transparent 60%);
  filter: blur(6px);
  opacity: 0.9;
}

/* ===== Explorer window ===== */
.explorer-window {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: min(1200px, 94vw);
  height: min(880px, 92vh);
  display: flex;
  flex-direction: column;
  border-radius: var(--radius);
  background: rgba(220, 240, 220, 0.32);
  border: 1px solid rgba(255, 255, 255, 0.85);
  -webkit-backdrop-filter: blur(28px) saturate(160%);
          backdrop-filter: blur(28px) saturate(160%);
  box-shadow:
    inset 0 0 0 1px rgba(150, 210, 160, 0.55),
    inset 0 0 24px rgba(170, 220, 180, 0.35),
    0 0 0 1px rgba(255, 255, 255, 0.4),
    0 0 30px rgba(140, 200, 145, 0.45),
    0 30px 60px rgba(20, 60, 40, 0.35);
  overflow: hidden;
  z-index: 1;
}

/* Title bar */
.explorer-titlebar {
  position: relative;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 11px;
  color: rgba(20, 60, 90, 0.72);
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.55) 0%, rgba(255, 255, 255, 0.05) 60%, rgba(0, 0, 0, 0.04) 100%),
    linear-gradient(180deg, rgba(220, 240, 220, 0.6) 0%, rgba(170, 215, 190, 0.6) 100%);
  border-bottom: 1px solid rgba(255, 255, 255, 0.55);
  flex-shrink: 0;
}
.explorer-title {
  letter-spacing: 0.02em;
  text-shadow: 0 1px 0 rgba(255, 255, 255, 0.7);
  user-select: none;
}
.window-controls {
  position: absolute;
  right: 6px;
  top: 6px;
  display: flex;
  gap: 2px;
}
.window-btn {
  width: 30px;
  height: 22px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid rgba(0, 60, 100, 0.45);
  border-radius: 4px;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.6), rgba(255, 255, 255, 0.05) 50%, rgba(0, 0, 0, 0.08)),
    linear-gradient(180deg, #d3edfb 0%, #95c1de 55%, #6996b8 100%);
  color: #103456;
  font-size: 10px;
  font-family: inherit;
  cursor: pointer;
  text-decoration: none;
  text-shadow: 0 1px 0 rgba(255, 255, 255, 0.7);
  transition: filter 0.1s, transform 0.05s;
}
.window-btn:hover { filter: brightness(1.08); }
.window-btn:active { transform: translateY(1px); }
.window-btn.close {
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.55), rgba(255, 255, 255, 0.05) 50%, rgba(0, 0, 0, 0.1)),
    linear-gradient(180deg, #f1adad 0%, #cd3f3f 55%, #9a1f1f 100%);
  border-color: rgba(80, 0, 0, 0.6);
  color: #ffffff;
  text-shadow: 0 1px 1px rgba(0, 0, 0, 0.45);
}
.window-btn.close:hover { filter: brightness(1.1); }

/* Address bar */
.explorer-addressbar {
  height: 50px;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 0 12px;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.45) 0%, rgba(220, 240, 220, 0.45) 100%);
  border-bottom: 1px solid rgba(255, 255, 255, 0.55);
  flex-shrink: 0;
}
.orb-group {
  display: flex;
  align-items: center;
  gap: 4px;
}
.orb-btn {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  border: 1px solid rgba(0, 30, 80, 0.55);
  background:
    radial-gradient(circle at 50% 28%, rgba(255, 255, 255, 0.85), rgba(255, 255, 255, 0) 50%),
    radial-gradient(circle at 50% 100%, #093e6e 0%, #1c7ec4 30%, #6ec0ed 75%, #e7f4fc 100%);
  color: #ffffff;
  font-size: 13px;
  font-family: inherit;
  cursor: pointer;
  text-shadow: 0 1px 1px rgba(0, 30, 80, 0.55);
  box-shadow:
    inset 0 0 0 1px rgba(255, 255, 255, 0.7),
    0 2px 4px rgba(0, 30, 80, 0.35);
  transition: filter 0.15s, transform 0.05s;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}
.orb-btn:hover { filter: brightness(1.1); }
.orb-btn:active { transform: scale(0.95); }
.orb-btn span { display: inline-block; transform: translateX(-1px); }
.orb-btn.orb-forward span { transform: translateX(1px); }

.orb-dropdown {
  width: 16px;
  height: 22px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.6), rgba(255, 255, 255, 0.1));
  border: 1px solid rgba(0, 30, 80, 0.25);
  border-radius: 4px;
  color: rgba(20, 60, 90, 0.7);
  font-size: 9px;
  cursor: pointer;
  font-family: inherit;
}

.address-input {
  flex: 1;
  height: 28px;
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 0 8px 0 12px;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.96), rgba(245, 252, 248, 0.92));
  border: 1px solid rgba(120, 180, 140, 0.45);
  border-radius: var(--radius-pill);
  box-shadow: inset 0 1px 2px rgba(0, 60, 30, 0.08);
  font-size: 12px;
  color: var(--aero-text);
}
.address-favicon { font-size: 12px; }
.address-crumb a {
  color: var(--aero-text);
}
.address-crumb a:hover { color: var(--aero-link); text-decoration: none; }
.address-current { font-weight: 600; color: var(--aero-blue-deep); }
.address-sep { color: rgba(20, 60, 90, 0.5); }
.address-spacer { flex: 1; }
.address-chev { color: rgba(20, 60, 90, 0.55); font-size: 10px; }

.search-input {
  width: 200px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 6px;
  padding: 0 10px;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.96), rgba(245, 252, 248, 0.92));
  border: 1px solid rgba(120, 180, 140, 0.45);
  border-radius: var(--radius-pill);
  font-size: 11px;
  color: var(--aero-text-soft);
}

/* Tabs row */
.explorer-tabs {
  display: flex;
  align-items: stretch;
  height: 30px;
  padding: 0 6px;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.65), rgba(220, 240, 230, 0.45));
  border-bottom: 1px solid rgba(255, 255, 255, 0.5);
  flex-shrink: 0;
}
.tab {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 0 16px;
  margin: 0 4px;
  font-size: 12px;
  color: var(--aero-blue);
  font-weight: 600;
  text-decoration: none;
  border-bottom: 2px solid transparent;
}
.tab:hover {
  color: var(--aero-link-hover);
  text-decoration: none;
}
.tab.active {
  color: var(--aero-blue-deep);
  border-bottom-color: var(--aero-blue);
}
.tab-chev { font-size: 9px; opacity: 0.7; }

/* Body: sidebar + main */
.explorer-body {
  flex: 1;
  display: flex;
  overflow: hidden;
  background: #ffffff;
}

.explorer-sidebar {
  width: 240px;
  flex-shrink: 0;
  padding: 18px 0;
  overflow-y: auto;
  background:
    linear-gradient(180deg, #f6f8e9 0%, #ecf3e3 100%);
  border-right: 1px solid rgba(140, 180, 130, 0.35);
}

.sidebar-section { margin-bottom: 14px; }
.sidebar-heading {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 4px 18px 6px;
  font-size: 15px;
  font-weight: 600;
  color: var(--aero-blue-deep);
}
.sidebar-icon {
  width: 20px;
  height: 20px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  font-size: 11px;
  color: #ffffff;
  background:
    radial-gradient(circle at 50% 28%, rgba(255, 255, 255, 0.7), rgba(255, 255, 255, 0) 60%),
    linear-gradient(180deg, #5dadea, #1c7ec4);
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.7), 0 1px 2px rgba(0, 30, 80, 0.25);
  text-shadow: 0 1px 1px rgba(0, 30, 80, 0.4);
}
.sidebar-icon.icon-mail {
  background:
    radial-gradient(circle at 50% 28%, rgba(255, 255, 255, 0.7), rgba(255, 255, 255, 0) 60%),
    linear-gradient(180deg, #c8c8c8, #7a7a7a);
}
.sidebar-icon.icon-globe {
  background:
    radial-gradient(circle at 50% 28%, rgba(255, 255, 255, 0.7), rgba(255, 255, 255, 0) 60%),
    linear-gradient(180deg, #74c87a, #2a8a39);
}

.sidebar-list {
  list-style: none;
}
.sidebar-list li {
  position: relative;
  font-size: 12px;
  padding: 3px 18px 3px 38px;
}
.sidebar-list li::before {
  content: "\203A";
  position: absolute;
  left: 28px;
  color: rgba(15, 99, 176, 0.6);
  font-size: 14px;
  line-height: 1;
  top: 4px;
}
.sidebar-list a {
  color: var(--aero-text);
  text-decoration: none;
}
.sidebar-list a:hover {
  color: var(--aero-link);
  text-decoration: underline;
}

/* Main content area */
.explorer-main {
  flex: 1;
  overflow-y: auto;
  padding: 24px 36px 40px;
  background: #ffffff;
  color: var(--aero-text);
  line-height: 1.55;
  scroll-behavior: smooth;
}

/* Hide the inline TOC inside the article — the sidebar already navigates */
.article-toc { display: none; }

/* Article typography */
.explorer-main h1,
.explorer-main h2,
.explorer-main h3,
.explorer-main h4 {
  color: var(--aero-blue-deep);
  font-weight: 600;
  line-height: 1.25;
}
.explorer-main h1 { font-size: 26px; margin: 4px 0 10px; }
.explorer-main h2 {
  font-size: 19px;
  margin: 22px 0 8px;
  padding-bottom: 4px;
  border-bottom: 1px solid rgba(15, 99, 176, 0.18);
}
.explorer-main h3 { font-size: 14px; margin: 14px 0 6px; color: var(--aero-blue); }
.explorer-main h4 { font-size: 13px; margin: 8px 0 4px; color: var(--aero-text-soft); }

.explorer-main p { margin: 6px 0 10px; font-size: 13px; }
.explorer-main ul,
.explorer-main ol { margin: 6px 0 10px 22px; }
.explorer-main li { margin: 3px 0; }
.explorer-main strong { color: var(--aero-blue-deep); }
.explorer-main code, .explorer-main pre {
  font-family: "Consolas", "SFMono-Regular", Menlo, monospace;
}
.explorer-main code {
  background: #eaf3fa;
  padding: 1px 4px;
  border-radius: 3px;
  font-size: 11px;
  color: var(--aero-blue-deep);
}

.article-section { margin-top: 14px; }
.article-header { margin-bottom: 16px; }
.article-title {
  font-size: 28px;
  font-weight: 700;
  line-height: 1.2;
  color: var(--aero-blue-deep);
  margin: 8px 0 10px;
}
.article-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 12px;
  align-items: center;
  font-size: 11px;
  color: var(--aero-text-soft);
  margin-bottom: 8px;
}
.article-subtitle {
  font-size: 14px;
  color: var(--aero-text-soft);
  font-style: italic;
  margin-bottom: 8px;
}

/* "Where I'm strongest" lead/positioning block — sits between the
   article header and the body. Blue → green Frutiger Aero gradient
   to echo the OG card. */
.article-lead {
  margin: 8px 0 20px;
  padding: 14px 20px 16px;
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.5) 0%, rgba(255, 255, 255, 0) 60%),
    linear-gradient(120deg, #d8ebfa 0%, #d6ebe8 55%, #d6efd2 100%);
  border: 1px solid rgba(40, 120, 100, 0.35);
  border-radius: 14px;
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.95),
    0 6px 14px rgba(15, 99, 130, 0.15);
}
.article-lead .article-lead-eyebrow {
  margin: 0 0 4px;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--aero-green-deep);
}
.article-lead > p:not(.article-lead-eyebrow) {
  margin: 0;
  font-size: 14px;
  line-height: 1.55;
  color: var(--aero-blue-deep);
}
.article-lead strong {
  color: var(--aero-blue);
  font-weight: 700;
}

/* Meta pill */
.meta-pill {
  display: inline-block;
  padding: 2px 10px;
  border-radius: var(--radius-pill);
  background: linear-gradient(180deg, #c0eaa0, #7bc24b);
  color: #1f4408;
  font-size: 11px;
  font-weight: 600;
  border: 1px solid rgba(40, 80, 20, 0.4);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.7);
}

/* Tables */
.table-wrap {
  overflow-x: auto;
  margin: 10px 0 16px;
  border: 1px solid rgba(15, 99, 176, 0.18);
  border-radius: 8px;
  background: linear-gradient(180deg, #ffffff, #f3f8fb);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.85);
}
.explorer-main table {
  width: 100%;
  border-collapse: collapse;
  font-size: 12px;
}
.explorer-main th,
.explorer-main td {
  padding: 8px 10px;
  text-align: left;
  vertical-align: top;
  border-bottom: 1px solid rgba(15, 99, 176, 0.1);
}
.explorer-main th {
  background: linear-gradient(180deg, #cfeaf7, #9bcce8);
  color: var(--aero-blue-deep);
  font-weight: 600;
  border-bottom: 1px solid rgba(15, 99, 176, 0.28);
}
.explorer-main tr:last-child td { border-bottom: none; }
.explorer-main tr:nth-child(even) td { background: rgba(220, 238, 252, 0.4); }

/* ASCII diagrams (fallback — most have been replaced with .aero-* blocks below) */
.ascii-diagram {
  display: block;
  white-space: pre;
  overflow-x: auto;
  padding: 10px 14px;
  margin: 10px 0 16px;
  background: linear-gradient(180deg, #ffffff, #eef6fb);
  border: 1px solid rgba(15, 99, 176, 0.2);
  border-radius: 8px;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.95);
  font-size: 11px;
  line-height: 1.35;
  color: var(--aero-blue-deep);
}

/* ===== Frutiger Aero diagrams (replacements for ASCII art) ===== */

/* Pipeline: trigger → engine → enriched outputs (section 2.3) */
.aero-pipeline {
  display: grid;
  grid-template-columns: 1fr auto 1.15fr auto 1fr;
  gap: 8px;
  margin: 14px 0;
  align-items: stretch;
}
.aero-pipeline-input,
.aero-pipeline-output,
.aero-pipeline-engine {
  background: linear-gradient(180deg, #ffffff 0%, #e3f1fa 100%);
  border: 1px solid rgba(15, 99, 176, 0.32);
  border-radius: 10px;
  padding: 12px;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.95), 0 3px 8px rgba(15, 99, 176, 0.16);
}
.aero-pipeline-engine {
  background: linear-gradient(180deg, #cfeaf7 0%, #9bcce8 100%);
  text-align: center;
}
.aero-pipeline-title {
  font-weight: 700;
  color: var(--aero-blue-deep);
  margin-bottom: 6px;
  font-size: 13px;
}
.aero-pipeline-engine-title {
  font-weight: 700;
  color: var(--aero-blue-deep);
  font-size: 14px;
  margin-bottom: 8px;
}
.aero-pipeline-engine-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  background: rgba(15, 99, 176, 0.3);
  border: 1px solid rgba(15, 99, 176, 0.3);
  border-radius: 6px;
  overflow: hidden;
}
.aero-pipeline-engine-grid > div {
  background: rgba(255, 255, 255, 0.92);
  padding: 6px 8px;
  font-size: 10.5px;
  color: var(--aero-text);
  text-align: left;
}
.aero-pipeline-engine-grid .cell-head {
  background: rgba(15, 99, 176, 0.14);
  font-weight: 700;
  color: var(--aero-blue-deep);
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  text-align: center;
}
.aero-pipeline-arrow {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0 4px;
  font-size: 22px;
  color: var(--aero-blue);
  font-weight: 700;
}
.aero-pipeline ul {
  list-style: none;
  margin: 0;
  padding: 0;
  font-size: 11px;
}
.aero-pipeline ul li { padding: 2px 0; }
.aero-pipeline-output ul li::before {
  content: '\25B8\00a0';
  color: var(--aero-blue);
  font-weight: 700;
}

@media (max-width: 760px) {
  .aero-pipeline { grid-template-columns: 1fr; }
  .aero-pipeline-arrow { transform: rotate(90deg); padding: 4px 0; }
}

/* Flow: vertical 4-step feedback loop (section 3) */
.aero-flow {
  display: flex;
  flex-direction: column;
  align-items: center;
  margin: 14px 0;
}
.aero-flow-card {
  width: 100%;
  max-width: 520px;
  padding: 12px 16px;
  background: linear-gradient(180deg, #ffffff 0%, #d8eaf8 100%);
  border: 1px solid rgba(15, 99, 176, 0.4);
  border-radius: 12px;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.95), 0 4px 10px rgba(15, 99, 176, 0.2);
  text-align: center;
}
.aero-flow-title {
  font-weight: 700;
  font-size: 14px;
  color: var(--aero-blue-deep);
}
.aero-flow-note {
  font-size: 11px;
  color: var(--aero-text-soft);
  margin-top: 2px;
}
.aero-flow-arrow {
  position: relative;
  padding: 12px 0 4px;
  text-align: center;
  width: 100%;
}
.aero-flow-arrow span {
  display: inline-block;
  padding: 2px 12px;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.95), rgba(220, 240, 252, 0.7));
  border: 1px solid rgba(15, 99, 176, 0.22);
  border-radius: 999px;
  font-size: 11px;
  color: var(--aero-text-soft);
  font-style: italic;
}
.aero-flow-arrow::after {
  content: '\25BC';
  display: block;
  color: var(--aero-blue);
  font-size: 13px;
  margin-top: 4px;
}

/* Competency stack: 4 layered levels (section 5.1) */
.aero-stack {
  display: flex;
  flex-direction: column;
  margin: 14px 0;
  border-radius: 12px;
  overflow: hidden;
  border: 1px solid rgba(15, 99, 176, 0.4);
  box-shadow: 0 6px 18px rgba(15, 99, 176, 0.22);
}
.aero-stack-row {
  position: relative;
  display: grid;
  grid-template-columns: 80px 1fr auto;
  gap: 14px;
  align-items: center;
  padding: 12px 16px;
  color: #ffffff;
  text-shadow: 0 1px 1px rgba(0, 30, 80, 0.45);
}
.aero-stack-row::before {
  content: '';
  position: absolute;
  left: 0; right: 0; top: 0; height: 50%;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.3), rgba(255, 255, 255, 0));
  pointer-events: none;
}
.aero-stack-row > * { position: relative; z-index: 1; }
.aero-stack-row .level-label {
  font-weight: 700;
  font-size: 10.5px;
  letter-spacing: 0.08em;
  opacity: 0.95;
}
.aero-stack-row .level-title { font-weight: 600; font-size: 13px; }
.aero-stack-row .level-note { font-size: 11px; opacity: 0.85; font-style: italic; }
.aero-stack-row.level-1 { background: linear-gradient(180deg, #b2e57c 0%, #6cba2e 100%); }
.aero-stack-row.level-2 { background: linear-gradient(180deg, #66c0ee 0%, #2b8bd1 100%); }
.aero-stack-row.level-3 { background: linear-gradient(180deg, #4f9fdb 0%, #1d6db0 100%); }
.aero-stack-row.level-4 { background: linear-gradient(180deg, #2a7bbf 0%, #093e6e 100%); }

@media (max-width: 600px) {
  .aero-stack-row { grid-template-columns: 64px 1fr; }
  .aero-stack-row .level-note { grid-column: 2; margin-top: -4px; }
}

/* Tree schema: ROW = ENTITY → branches (section 5.2) */
.aero-tree {
  margin: 14px 0;
  padding: 14px 18px;
  background: linear-gradient(180deg, #ffffff, #eaf3fb);
  border: 1px solid rgba(15, 99, 176, 0.28);
  border-radius: 12px;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.95), 0 3px 10px rgba(15, 99, 176, 0.14);
}
.aero-tree-root {
  display: inline-block;
  padding: 6px 14px;
  background: linear-gradient(180deg, #cfeaf7, #95c1de);
  border: 1px solid rgba(15, 99, 176, 0.4);
  border-radius: 8px;
  font-weight: 700;
  color: var(--aero-blue-deep);
  font-size: 13px;
  margin-bottom: 12px;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.85);
}
.aero-tree-branches {
  list-style: none;
  margin: 0 0 0 14px;
  padding: 0;
  position: relative;
  font-size: 12.5px;
}
.aero-tree-branches::before {
  content: '';
  position: absolute;
  left: 0; top: 0; bottom: 14px;
  width: 2px;
  background: rgba(15, 99, 176, 0.35);
}
.aero-tree-branches li {
  position: relative;
  padding: 6px 0 6px 24px;
}
.aero-tree-branches li::before {
  content: '';
  position: absolute;
  left: 0; top: 14px;
  width: 18px; height: 2px;
  background: rgba(15, 99, 176, 0.35);
}
.aero-tree-branches strong { color: var(--aero-blue-deep); }

/* Weekly cadence: 7-day grid (section 5.3) */
.aero-week {
  display: grid;
  grid-template-columns: repeat(7, minmax(0, 1fr));
  gap: 6px;
  margin: 14px 0;
}
.aero-day {
  display: flex;
  flex-direction: column;
  padding: 8px;
  background: linear-gradient(180deg, #ffffff 0%, #e7f3fb 100%);
  border: 1px solid rgba(15, 99, 176, 0.3);
  border-radius: 10px;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.95), 0 3px 8px rgba(15, 99, 176, 0.12);
  min-height: 100px;
}
.aero-day-name {
  font-weight: 700;
  text-align: center;
  color: var(--aero-blue-deep);
  border-bottom: 1px solid rgba(15, 99, 176, 0.2);
  padding-bottom: 4px;
  margin-bottom: 6px;
  font-size: 11.5px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}
.aero-day-task { font-size: 10.5px; line-height: 1.35; color: var(--aero-text); }
.aero-day.weekend {
  background: linear-gradient(180deg, #f1faea 0%, #cce5b3 100%);
  border-color: rgba(108, 186, 46, 0.45);
}
.aero-day.weekend .aero-day-name {
  color: var(--aero-green-deep);
  border-bottom-color: rgba(108, 186, 46, 0.3);
}

@media (max-width: 800px) {
  .aero-week { grid-template-columns: repeat(2, 1fr); }
}

/* Small button variant for inline CTAs */
.btn-sm {
  min-width: 0;
  padding: 5px 14px;
  font-size: 11px;
}

/* Callout / blockquote */
.callout, blockquote.callout {
  margin: 12px 0;
  padding: 10px 16px;
  border-left: 4px solid var(--aero-green);
  background: linear-gradient(180deg, #eff8e6, #e0f0c8);
  border-radius: 6px;
  font-style: italic;
  color: var(--aero-blue-deep);
}

.reference {
  font-size: 12px;
  color: var(--aero-text-soft);
  margin: 6px 0 12px;
}

/* Vista glossy pill button (used by the CV link inside the article) */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 86px;
  padding: 7px 18px;
  border: 1px solid rgba(0, 50, 100, 0.45);
  border-radius: var(--radius-pill);
  color: #ffffff;
  font-family: inherit;
  font-size: 12px;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
  text-shadow: 0 1px 1px rgba(0, 30, 70, 0.55);
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.65) 0%, rgba(255, 255, 255, 0.05) 50%, rgba(0, 0, 0, 0.1) 51%, rgba(0, 0, 0, 0.15) 100%),
    linear-gradient(180deg, #66c0ee 0%, #2b8bd1 60%, #105a99 100%);
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.85),
    0 4px 10px rgba(0, 30, 80, 0.25);
  transition: filter 0.15s, transform 0.05s;
}
.btn:hover { filter: brightness(1.08); }
.btn:active { transform: translateY(1px); }

/* ===== Status bar ===== */
.explorer-statusbar {
  height: 30px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 0 14px;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.4), rgba(220, 240, 220, 0.45));
  border-top: 1px solid rgba(255, 255, 255, 0.55);
  font-size: 11px;
  color: rgba(20, 60, 90, 0.65);
  flex-shrink: 0;
}
.status-left { flex-shrink: 0; }
.status-right { font-variant-numeric: tabular-nums; flex-shrink: 0; }

/* Background music toggle (sits between the status text and the clock) */
.music-toggle {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 12px;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.65), rgba(220, 240, 230, 0.45));
  border: 1px solid rgba(15, 99, 176, 0.35);
  border-radius: var(--radius-pill);
  color: var(--aero-blue-deep);
  font-family: inherit;
  font-size: 11px;
  font-weight: 600;
  cursor: pointer;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.95);
  transition: filter 0.15s, background 0.15s;
  white-space: nowrap;
}
.music-toggle:hover { filter: brightness(1.06); }
.music-toggle.playing {
  background: linear-gradient(180deg, #b2e57c 0%, #6cba2e 100%);
  color: #1f4408;
  border-color: rgba(40, 80, 20, 0.55);
  text-shadow: 0 1px 0 rgba(255, 255, 255, 0.55);
}
.music-toggle .music-icon { font-size: 13px; line-height: 1; }
.music-toggle.playing .music-icon { animation: music-pulse 1.4s ease-in-out infinite; }
@keyframes music-pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50%      { opacity: 0.55; transform: scale(0.85); }
}

/* Hidden YouTube audio engine */
#yt-audio {
  position: fixed;
  left: -9999px; top: -9999px;
  width: 1px; height: 1px;
  pointer-events: none;
  opacity: 0;
}

/* ===== Scrollbars (Vista-flavored) ===== */
.explorer-main::-webkit-scrollbar,
.explorer-sidebar::-webkit-scrollbar { width: 14px; }
.explorer-main::-webkit-scrollbar-track,
.explorer-sidebar::-webkit-scrollbar-track {
  background: linear-gradient(90deg, rgba(15, 99, 176, 0.04), rgba(15, 99, 176, 0.02));
}
.explorer-main::-webkit-scrollbar-thumb,
.explorer-sidebar::-webkit-scrollbar-thumb {
  background: linear-gradient(180deg, #cfe9fb, #6db5e8 60%, #2a7ec4);
  border: 1px solid rgba(15, 99, 176, 0.35);
  border-radius: 8px;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.85);
}
.explorer-main::-webkit-scrollbar-thumb:hover,
.explorer-sidebar::-webkit-scrollbar-thumb:hover { filter: brightness(1.1); }

/* ===== Mobile ===== */
@media (max-width: 800px) {
  /* The explorer chrome stops trying to look like a centered window
     and just fills the viewport. Use dvh where supported so iOS
     Safari doesn't leave a strip under the address bar. */
  .explorer-window {
    width: 100vw;
    height: 100vh;
    height: 100dvh;
    border-radius: 0;
    top: 0; left: 0;
    transform: none;
    box-shadow: none;
  }

  /* Compact title bar — keep the close (×) so back to home still works. */
  .explorer-titlebar { height: 30px; font-size: 10px; }
  .window-controls { top: 4px; right: 4px; gap: 2px; }
  .window-btn { width: 26px; height: 20px; font-size: 9px; }

  /* The address bar is decorative ornament; drop it on mobile to claim
     the real estate for the article. */
  .explorer-addressbar { display: none; }

  /* Tabs row stays, but tighter and without the dropdown chevrons. */
  .explorer-tabs { padding: 0 6px; height: 30px; }
  .tab { padding: 0 10px; margin: 0; font-size: 11px; }
  .tab-chev { display: none; }

  /* Sidebar is removed on mobile; the inline TOC inside the article
     takes its place so navigation stays one tap away. */
  .explorer-sidebar { display: none; }
  .explorer-body { flex-direction: column; }

  /* Re-enable the inline TOC (hidden on desktop because the sidebar
     covers it). */
  .article-toc {
    display: block;
    margin: 4px 0 14px;
    padding: 10px 14px;
    background: linear-gradient(180deg, rgba(255, 255, 255, 0.95), rgba(220, 240, 252, 0.6));
    border: 1px solid rgba(15, 99, 176, 0.18);
    border-radius: 10px;
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.85);
  }
  .article-toc strong {
    display: block;
    margin-bottom: 6px;
    color: var(--aero-blue-deep);
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 0.06em;
  }
  .article-toc ol {
    columns: 1;
    -webkit-columns: 1;
    margin: 0 0 0 18px;
    font-size: 12px;
  }
  .article-toc li { margin: 2px 0; }

  /* Tighter article typography. */
  .explorer-main { padding: 14px 16px 24px; }
  .article-title { font-size: 22px; line-height: 1.2; }
  .explorer-main h1 { font-size: 22px; }
  .explorer-main h2 { font-size: 16px; }
  .article-meta { font-size: 10px; gap: 4px 8px; }
  .article-subtitle { font-size: 13px; }

  /* Lead positioning block: smaller padding so it doesn't dominate. */
  .article-lead { margin: 4px 0 14px; padding: 12px 14px; border-radius: 10px; }
  .article-lead > p:not(.article-lead-eyebrow) { font-size: 13px; line-height: 1.5; }

  /* Status bar: hide "1 item" decorative label so the music toggle and
     clock have room. */
  .status-left { display: none; }
  .explorer-statusbar { padding: 0 10px; gap: 8px; height: 32px; }
  .music-toggle { font-size: 10px; padding: 3px 10px; }
  .status-right { font-size: 10px; }
}