@import url('https://fonts.googleapis.com/css2?family=Archivo:ital,wght@0,400;0,500;0,600;1,400&family=Space+Grotesk:wght@400;500;600;700&display=swap');

:root {
  --bg-primary: #090b10;
  --bg-secondary: #10141c;
  --bg-card: #151a23;
  --bg-card-hover: #1b2230;
  --text-main: #f4f7fb;
  --text-muted: #aeb8c7;
  --text-soft: #d5dce7;
  --accent-orange: #f97316;
  --accent-blue: #7dd3fc;
  --accent-green: #34d399;
  --accent-purple: #c4b5fd;
  --accent-red: #f87171;
  --border-color: #293241;
  --border-subtle: rgba(174, 184, 199, 0.13);
  --code-bg: #070a0f;
  --sidebar-width: 320px;
  --reading-width: 68ch;
  --font-heading: 'Space Grotesk', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-body: 'Archivo', -apple-system, BlinkMacSystemFont, 'Segoe UI', Helvetica, Arial, sans-serif;
  --ease: cubic-bezier(0.16, 1, 0.3, 1);
  --dot-color: rgba(125, 211, 252, 0.08);
  --shadow-card: 0 18px 60px rgba(0, 0, 0, 0.24);
  --sp-1: 4px;
  --sp-2: 8px;
  --sp-3: 12px;
  --sp-4: 16px;
  --sp-5: 24px;
  --sp-6: 32px;
  --sp-7: 48px;
  --sp-8: 64px;
}
:root[data-theme="light"] {
  --bg-primary: #f6f7f9;
  --bg-secondary: #ffffff;
  --bg-card: #ffffff;
  --bg-card-hover: #eef3f8;
  --text-main: #111827;
  --text-muted: #4b5563;
  --text-soft: #273244;
  --border-color: #dbe3ee;
  --border-subtle: rgba(75, 85, 99, 0.16);
  --code-bg: #eef2f7;
  --accent-blue: #0369a1;
  --dot-color: rgba(3, 105, 161, 0.08);
  --shadow-card: 0 18px 50px rgba(17, 24, 39, 0.08);
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html { color-scheme: dark; scroll-behavior: smooth; font-size: var(--reading-scale, 100%); }
html[data-theme="light"] { color-scheme: light; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { animation-duration: 0.001ms !important; animation-iteration-count: 1 !important; transition-duration: 0.001ms !important; }
}
body {
  font-family: var(--font-body);
  background-color: var(--bg-primary);
  background-image: radial-gradient(circle, var(--dot-color) 1.5px, transparent 1.6px);
  background-size: 22px 22px;
  color: var(--text-main);
  line-height: 1.6;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

html,
body {
  max-width: 100%;
  overflow-x: clip;
}
:focus-visible { outline: 2px solid var(--accent-blue); outline-offset: 2px; border-radius: 2px; }

/* Reading progress bar */
.reading-progress {
  position: fixed; top: 0; left: 0; height: 3px; width: 0%;
  background: linear-gradient(90deg, var(--accent-orange), var(--accent-blue));
  z-index: 999; transition: width 0.1s linear;
}

/* Floating reading-tools widget */
.reading-tools {
  position: fixed; bottom: 20px; right: 20px; z-index: 90;
  display: flex; align-items: center; gap: 4px;
  background: var(--bg-card); border: 1px solid var(--border-color);
  border-radius: 30px; padding: 6px; box-shadow: 0 12px 32px -12px rgba(0,0,0,0.45);
}
.reading-tools button {
  background: transparent; border: none; color: var(--text-main); cursor: pointer;
  width: 36px; height: 36px; border-radius: 50%; font-size: 0.95rem; font-weight: 700;
  display: flex; align-items: center; justify-content: center;
  transition: background 150ms var(--ease);
}
.reading-tools button:hover { background: var(--bg-card-hover); }
.reading-tools .divider { width: 1px; height: 20px; background: var(--border-color); margin: 0 2px; }

/* Top Navigation */
header.topbar {
  height: 64px;
  background-color: var(--bg-secondary);
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 28px;
  flex-shrink: 0;
  z-index: 10;
  position: sticky;
  top: 0;
}
.brand-group { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; }
.brand-logo {
  font-family: var(--font-heading);
  background: var(--text-main);
  color: var(--bg-primary);
  font-weight: 700;
  font-size: 1.05rem;
  padding: 6px 12px;
  border-radius: 6px;
  letter-spacing: 0.02em;
  text-decoration: none;
  white-space: nowrap;
}
.brand-title { font-family: var(--font-heading); font-size: 1.05rem; font-weight: 600; color: var(--text-main); letter-spacing: -0.01em; }
.brand-domain {
  font-size: 0.8rem;
  background: rgba(96, 165, 250, 0.12);
  color: var(--accent-blue);
  padding: 4px 10px;
  border-radius: 20px;
  font-weight: 600;
  border: 1px solid rgba(96, 165, 250, 0.25);
}
.top-links { display: flex; align-items: center; gap: 18px; flex-wrap: wrap; }
.top-links a { color: var(--text-muted); text-decoration: none; font-size: 0.88rem; font-weight: 500; transition: color 150ms var(--ease); }
.top-links a:hover { color: var(--accent-orange); }
.badge-live {
  background: rgba(52, 211, 153, 0.15);
  color: var(--accent-green);
  padding: 4px 10px;
  border-radius: 12px;
  font-size: 0.75rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 6px;
}
.badge-live::before {
  content: "";
  width: 6px; height: 6px;
  border-radius: 50%;
  background-color: var(--accent-green);
  animation: pulse 2s infinite;
}
@keyframes pulse { 0% { opacity: 1; } 50% { opacity: 0.4; } 100% { opacity: 1; } }

/* Layout */
.app-container { display: flex; flex: 1; min-height: calc(100vh - 64px); }

/* Sidebar */
aside.sidebar {
  width: var(--sidebar-width);
  background-color: var(--bg-secondary);
  border-right: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
  overflow-y: auto;
  max-height: calc(100vh - 64px);
  position: sticky;
  top: 64px;
  align-self: flex-start;
}
.search-box { padding: 16px 20px; border-bottom: 1px solid var(--border-color); }
.search-input {
  width: 100%; padding: 8px 12px;
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 6px; color: var(--text-main);
  font-size: 0.85rem; outline: none;
  transition: border-color 150ms var(--ease);
}
.search-input:focus { border-color: var(--accent-blue); }
.nav-section { padding: 14px 0; border-bottom: 1px solid var(--border-color); }
.nav-section-title {
  font-family: var(--font-heading);
  font-size: 0.7rem; text-transform: uppercase; letter-spacing: 0.1em;
  color: var(--text-muted); font-weight: 600; padding: 6px 20px 8px 20px;
}
.nav-link {
  display: block; padding: var(--sp-2) var(--sp-4); color: var(--text-muted); text-decoration: none;
  font-size: 0.88rem; line-height: 1.35; border-left: 3px solid transparent; transition: all 150ms var(--ease);
}
.nav-link:hover { background-color: var(--bg-card); color: var(--accent-blue); border-left-color: var(--accent-blue); }
.nav-link.current { background-color: var(--bg-card); color: var(--accent-orange); border-left-color: var(--accent-orange); font-weight: 700; }
.nav-link.done::after { content: " \2713"; color: var(--accent-green); }

/* Main Content Area */
main.main-viewport { flex: 1; overflow-x: hidden; padding: 40px 60px; scroll-behavior: smooth; }
.content-wrapper { max-width: 1000px; margin: 0 auto; }
.content-wrapper.reading { max-width: 720px; }
.content-wrapper.reading .table-container,
.content-wrapper.reading pre { max-width: 100%; }

/* Typography & Sections */
h1.hero-title { font-family: var(--font-heading); font-size: 2.4rem; font-weight: 700; letter-spacing: -0.02em; line-height: 1.15; margin-bottom: 14px; color: var(--text-main); }
.hero-subtitle { font-size: 1.1rem; color: var(--text-muted); margin-bottom: var(--sp-6); max-width: 820px; line-height: 1.65; }
section.doc-section { margin-bottom: 56px; scroll-margin-top: 24px; }
h2.section-heading {
  font-family: var(--font-heading);
  font-size: 1.45rem; font-weight: 600; color: var(--accent-orange); margin-bottom: 20px;
  display: flex; align-items: center; gap: 12px; border-bottom: 1px solid var(--border-color); padding-bottom: 10px;
}
h3.sub-heading { font-family: var(--font-heading); font-size: 1.15rem; font-weight: 600; color: var(--accent-blue); margin: 26px 0 12px 0; }
h4.mini-heading { font-family: var(--font-heading); font-size: 1.02rem; font-weight: 600; color: var(--text-main); margin: 18px 0 8px 0; }
p { margin-bottom: 18px; color: var(--text-muted); max-width: 68ch; overflow-wrap: anywhere; }
li, td, dd, .scenario-question, .scenario-option { overflow-wrap: anywhere; }
code { overflow-wrap: anywhere; }
.content-wrapper.reading p { font-size: 1.06rem; line-height: 1.8; max-width: none; }
ul, ol { margin: 0 0 18px 22px; color: var(--text-muted); }
.content-wrapper.reading li { font-size: 1.02rem; line-height: 1.7; }
li { margin-bottom: 8px; }
.reading-meta { display: flex; align-items: center; gap: 14px; color: var(--text-muted); font-size: 0.85rem; margin-bottom: 28px; }

/* Cards */
.card { background-color: var(--bg-card); border: 1px solid var(--border-color); border-radius: 12px; padding: 24px; margin-bottom: 24px; box-shadow: 0 1px 2px rgba(0,0,0,0.04); transition: border-color 200ms var(--ease); }
.card-accent { border-left: 4px solid var(--accent-orange); }
.card-sre { border-left: 4px solid var(--accent-blue); }
.card-green { border-left: 4px solid var(--accent-green); }
.card-purple { border-left: 4px solid var(--accent-purple); }

/* Badges */
.pill {
  display: inline-block; font-family: var(--font-heading); font-size: 0.72rem; font-weight: 600; text-transform: uppercase;
  letter-spacing: 0.06em; padding: 5px 12px; border-radius: 20px; margin-right: 8px; margin-bottom: 6px;
}
.day-meta .pill { margin-right: 0; margin-bottom: 0; }
.pill-orange { background: rgba(249, 115, 22, 0.16); color: var(--accent-orange); }
.pill-blue { background: rgba(96, 165, 250, 0.16); color: var(--accent-blue); }
.pill-green { background: rgba(52, 211, 153, 0.16); color: var(--accent-green); }
.pill-purple { background: rgba(167, 139, 250, 0.16); color: var(--accent-purple); }
.pill-red { background: rgba(248, 113, 113, 0.16); color: var(--accent-red); }

/* Code & Pre */
pre {
  background-color: var(--code-bg); border: 1px solid var(--border-color); border-radius: 8px;
  padding: 18px; overflow-x: auto; font-family: 'SFMono-Regular', Consolas, Menlo, monospace;
  font-size: 0.85rem; color: var(--accent-blue); margin: 16px 0 24px 0;
}
code {
  font-family: 'SFMono-Regular', Consolas, Menlo, monospace; background: rgba(127, 127, 127, 0.16);
  padding: 2px 6px; border-radius: 4px; font-size: 0.9em;
}
pre code { background: none; padding: 0; color: inherit; }

/* Tables */
.table-container { overflow-x: auto; margin: 20px 0 30px 0; border: 1px solid var(--border-color); border-radius: 8px; }
table.data-table { width: 100%; border-collapse: collapse; font-size: 0.9rem; text-align: left; }
table.data-table th { background-color: var(--bg-secondary); color: var(--text-main); padding: 12px 16px; border-bottom: 1px solid var(--border-color); font-weight: 600; white-space: nowrap; }
table.data-table td { padding: 12px 16px; border-bottom: 1px solid var(--border-color); color: var(--text-muted); }
table.data-table tr:last-child td { border-bottom: none; }
table.data-table tr:hover td { background-color: var(--bg-card-hover); }
table.data-table tr.today-row td { background-color: rgba(249, 115, 22, 0.1); }
table.data-table a.day-link { color: var(--text-main); font-weight: 600; }
table.data-table a.day-link:hover { color: var(--accent-orange); }

/* Scenario / Quiz */
.scenario-card { background: var(--bg-card); border: 1px solid var(--border-color); border-left: 4px solid var(--accent-purple); border-radius: 12px; padding: 24px; margin: 28px 0; }
.scenario-question { font-size: 1rem; font-weight: 500; color: var(--text-main); margin-bottom: 16px; }
.scenario-options { display: flex; flex-direction: column; gap: 8px; margin-bottom: 18px; font-size: 0.9rem; color: var(--text-muted); }
.scenario-option { background: var(--bg-secondary); padding: 10px 14px; border-radius: 6px; border: 1px solid var(--border-color); cursor: default; }
.scenario-option.correct-answer { border-color: var(--accent-green); background: rgba(52, 211, 153, 0.1); color: var(--text-main); }
.scenario-reveal-btn {
  background-color: var(--accent-purple); color: #0a0a0b; border: none; padding: 8px 16px; border-radius: 6px;
  font-weight: 600; cursor: pointer; font-size: 0.85rem; transition: opacity 150ms var(--ease);
}
.scenario-reveal-btn:hover { opacity: 0.85; }
.scenario-explanation {
  margin-top: 14px; padding: 14px; background: var(--bg-secondary); border-left: 4px solid var(--accent-orange);
  border-radius: 4px; font-size: 0.88rem; color: var(--text-muted); display: none;
}
.scenario-explanation.shown { display: block; }

/* Day tracker widget */
.tracker-card {
  display: flex; align-items: center; gap: 28px; flex-wrap: wrap;
  background: var(--bg-card);
  border: 1px solid var(--border-color); border-radius: 12px; padding: 22px 24px; margin: 32px 0 40px;
  box-shadow: 0 1px 2px rgba(0,0,0,0.04);
}
.tracker-progress { flex: 1; min-width: 220px; }
.tracker-progress strong { font-family: var(--font-heading); font-weight: 600; }
.btn {
  display: inline-block; background-color: var(--text-main); color: var(--bg-primary); font-family: var(--font-heading); font-weight: 600;
  padding: 10px 18px; border-radius: 8px; border: none; cursor: pointer; font-size: 0.9rem; text-decoration: none; white-space: nowrap;
  transition: opacity 150ms var(--ease), transform 150ms var(--ease);
}
.btn:hover { opacity: 0.85; text-decoration: none; transform: translateY(-1px); }
.btn-outline { background: transparent; border: 1px solid var(--border-color); color: var(--text-main); }
.btn-outline:hover { border-color: var(--accent-blue); color: var(--accent-blue); opacity: 1; }
.btn-green { background-color: var(--accent-green); color: #04231a; }
.btn[aria-disabled="true"] { background-color: var(--bg-secondary); color: var(--text-muted); cursor: default; }
.btn[aria-disabled="true"]:hover { opacity: 1; transform: none; }
.jump-select-wrap { position: relative; display: inline-flex; flex-shrink: 0; }
select.jump-select {
  display: block;
  appearance: none; -webkit-appearance: none; -moz-appearance: none;
  font-family: var(--font-heading); padding-right: 36px;
  max-width: 160px; overflow: hidden; text-overflow: ellipsis;
}
select.jump-select:focus-visible { outline: 2px solid var(--accent-blue); outline-offset: 2px; }
.jump-select-wrap::after {
  content: ""; position: absolute; right: 16px; top: 50%; width: 7px; height: 7px;
  border-right: 2px solid var(--text-muted); border-bottom: 2px solid var(--text-muted);
  transform: translateY(-65%) rotate(45deg); pointer-events: none;
}

/* Day page header / nav */
.day-meta { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 18px; }
.day-nav {
  display: flex; justify-content: space-between; align-items: center; gap: 12px;
  padding: 16px 0; margin-top: 40px; border-top: 1px solid var(--border-color); flex-wrap: wrap;
}
.day-nav a, .day-nav span { font-size: 0.9rem; }
.services-grid { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 20px; }
.service-tag {
  background: var(--bg-secondary); border: 1px solid var(--border-color); border-radius: 6px;
  padding: 6px 12px; font-size: 0.82rem; color: var(--accent-blue);
}
.source-list { font-size: 0.82rem; color: var(--text-muted); }
.source-list a { color: var(--text-muted); }
.source-list a:hover { color: var(--accent-blue); }

/* Links */
a { color: var(--accent-blue); text-decoration: none; }
a:hover { text-decoration: underline; }

/* Mobile nav toggle */
.mobile-nav-toggle { display: none; background: var(--bg-card); border: 1px solid var(--border-color); color: var(--text-main); padding: 8px 14px; border-radius: 6px; font-size: 0.85rem; cursor: pointer; }

/* Long-form reading and mobile polish */
body {
  background-image:
    radial-gradient(circle at 20% 0%, rgba(125, 211, 252, 0.08), transparent 28rem),
    radial-gradient(circle, var(--dot-color) 1.2px, transparent 1.4px);
  background-attachment: fixed;
  text-rendering: optimizeLegibility;
}

.reading-progress {
  height: 4px;
  background: linear-gradient(90deg, var(--accent-orange), var(--accent-blue), var(--accent-green));
  box-shadow: 0 0 18px rgba(125, 211, 252, 0.28);
}

header.topbar {
  background: color-mix(in srgb, var(--bg-secondary) 92%, transparent);
  backdrop-filter: blur(18px);
  box-shadow: 0 1px 0 var(--border-subtle);
}

.brand-logo,
.brand-domain,
.pill,
.service-tag,
.btn,
.mobile-nav-toggle {
  border-radius: 8px;
}

.top-links a,
.nav-link,
.source-list a,
a.day-link {
  text-underline-offset: 3px;
}

.mobile-nav-toggle,
.sidebar-toggle,
.btn,
.scenario-reveal-btn,
.search-input,
.jump-select {
  min-height: 44px;
}

.mobile-nav-toggle {
  min-width: 44px;
  font-weight: 700;
}

.sidebar {
  scrollbar-color: var(--border-color) transparent;
}

.search-box {
  background: color-mix(in srgb, var(--bg-secondary) 88%, transparent);
  position: sticky;
  top: 0;
  z-index: 2;
}

.search-input {
  padding: 11px 13px;
  border-radius: 8px;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.03);
}

main.main-viewport {
  padding: var(--sp-6) clamp(20px, 4vw, 56px) var(--sp-7);
}

.content-wrapper {
  max-width: 1080px;
}

.content-wrapper.reading {
  max-width: var(--reading-width);
}

.content-wrapper.reading p,
.content-wrapper.reading li {
  color: var(--text-soft);
}

.content-wrapper.reading p {
  font-size: clamp(1.03rem, 0.98rem + 0.22vw, 1.13rem);
  line-height: 1.82;
  margin-bottom: 1.15em;
}

.content-wrapper.reading ul,
.content-wrapper.reading ol {
  margin-bottom: 1.4rem;
}

.content-wrapper.reading li {
  line-height: 1.75;
  margin-bottom: 0.55em;
  padding-left: 0.12rem;
}

h1.hero-title {
  font-size: clamp(2rem, 1.35rem + 2.2vw, 3.1rem);
  max-width: 22ch;
  margin-bottom: 18px;
}

.content-wrapper.reading h1.hero-title {
  max-width: 24ch;
}

.hero-subtitle {
  color: var(--text-soft);
  max-width: 72ch;
}

section.doc-section {
  margin-bottom: var(--sp-7);
  scroll-margin-top: 92px;
}

h2.section-heading {
  color: var(--text-main);
  font-size: clamp(1.28rem, 1.08rem + 0.7vw, 1.65rem);
  margin-bottom: var(--sp-5);
  padding-bottom: var(--sp-3);
  border-bottom-color: var(--border-subtle);
}

h2.section-heading::before {
  content: "";
  width: 10px;
  height: 10px;
  flex: 0 0 auto;
  border-radius: 999px;
  background: var(--accent-orange);
  box-shadow: 0 0 0 5px rgba(249, 115, 22, 0.14);
}

h3.sub-heading {
  margin: var(--sp-6) 0 var(--sp-3);
  color: var(--accent-blue);
}

h4.mini-heading {
  margin-top: var(--sp-5);
}

.reading-meta,
.day-meta,
.services-grid {
  margin-bottom: 24px;
}

.card,
.scenario-card,
.tracker-card {
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.025), rgba(255, 255, 255, 0)),
    var(--bg-card);
  border-color: var(--border-subtle);
  border-radius: 10px;
  box-shadow: var(--shadow-card);
}

.card {
  padding: var(--sp-5);
  margin-bottom: var(--sp-5);
}

.card > :last-child,
.scenario-card > :last-child {
  margin-bottom: 0;
}

.card:hover {
  border-color: color-mix(in srgb, var(--accent-blue) 34%, var(--border-color));
}

.pill {
  border: 1px solid currentColor;
  border-color: color-mix(in srgb, currentColor 28%, transparent);
}

pre,
code {
  border: 1px solid var(--border-subtle);
}

pre {
  line-height: 1.65;
}

.table-container {
  position: relative;
  border-color: var(--border-subtle);
  border-radius: 10px;
  box-shadow: var(--shadow-card);
  scrollbar-color: var(--accent-blue) var(--bg-secondary);
}

.table-container::after {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  width: 38px;
  pointer-events: none;
  background: linear-gradient(90deg, transparent, var(--bg-card));
  opacity: 0;
  transition: opacity 160ms var(--ease);
}

.table-container.is-scrollable::after {
  opacity: 1;
}

table.data-table {
  min-width: 640px;
}

table.data-table th {
  background: color-mix(in srgb, var(--bg-secondary) 88%, var(--accent-blue));
  font-family: var(--font-heading);
  font-size: 0.8rem;
  letter-spacing: 0.03em;
}

table.data-table td {
  line-height: 1.55;
  vertical-align: top;
}

.scenario-card {
  padding: var(--sp-5);
  margin: var(--sp-6) 0;
}

.scenario-question {
  font-size: clamp(1rem, 0.96rem + 0.18vw, 1.08rem);
  line-height: 1.72;
}

.scenario-options {
  gap: 10px;
}

.scenario-option {
  border-radius: 8px;
  padding: 13px 15px;
  line-height: 1.55;
}

.scenario-reveal-btn {
  border-radius: 8px;
  padding: 10px 16px;
}

.scenario-explanation {
  border-radius: 8px;
  line-height: 1.65;
}

#tracker:not(:empty) {
  margin: var(--sp-5) 0 var(--sp-6);
}

#tracker.tracker-card {
  display: flex;
}

.tracker-card,
#tracker:not(:empty) {
  padding: clamp(18px, 3vw, 24px);
}

#tracker:not(:empty),
.tracker-card:not(:empty) {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
  background:
    linear-gradient(135deg, rgba(125, 211, 252, 0.08), rgba(249, 115, 22, 0.07)),
    var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: 10px;
  box-shadow: var(--shadow-card);
}

.tracker-progress {
  color: var(--text-soft);
  line-height: 1.5;
}

.tracker-card:empty {
  display: none;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  line-height: 1.15;
}

.sidebar-toggle {
  display: none;
}

.jump-select-wrap {
  min-width: 170px;
  max-width: 260px;
}

select.jump-select {
  width: 100%;
  max-width: 100%;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  color: var(--text-main);
}

.reading-tools {
  background: color-mix(in srgb, var(--bg-card) 94%, transparent);
  backdrop-filter: blur(18px);
  border-color: var(--border-subtle);
  border-radius: 999px;
}

.reading-tools button {
  color: var(--text-soft);
}

.back-to-top {
  position: fixed;
  left: 20px;
  bottom: 20px;
  z-index: 90;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  background: color-mix(in srgb, var(--bg-card) 94%, transparent);
  backdrop-filter: blur(18px);
  border: 1px solid var(--border-subtle);
  color: var(--text-soft);
  font-size: 1.1rem;
  cursor: pointer;
  box-shadow: var(--shadow-card);
  opacity: 0;
  pointer-events: none;
  transform: translateY(8px);
  transition: opacity 180ms var(--ease), transform 180ms var(--ease), background 150ms var(--ease);
}

.back-to-top:hover {
  background: var(--bg-card-hover);
  color: var(--text-main);
}

.back-to-top.shown {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
}

.resume-reading {
  position: fixed;
  left: 50%;
  bottom: 18px;
  transform: translateX(-50%) translateY(120%);
  z-index: 95;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  max-width: min(92vw, 460px);
  padding: 10px 12px 10px 16px;
  background: color-mix(in srgb, var(--bg-card) 96%, transparent);
  color: var(--text-soft);
  border: 1px solid var(--border-subtle);
  border-radius: 999px;
  box-shadow: var(--shadow-card);
  opacity: 0;
  pointer-events: none;
  transition: opacity 180ms var(--ease), transform 180ms var(--ease);
}

.resume-reading.shown {
  opacity: 1;
  pointer-events: auto;
  transform: translateX(-50%) translateY(0);
}

.resume-reading button {
  min-height: 36px;
  padding: 7px 12px;
  border-radius: 999px;
}

.resume-reading .resume-dismiss {
  width: 36px;
  padding: 0;
  background: transparent;
  color: var(--text-muted);
  border: 1px solid var(--border-subtle);
}

.day-nav {
  align-items: stretch;
  gap: 14px;
  padding-top: 24px;
}

.day-nav a,
.day-nav .btn {
  min-height: 44px;
  display: inline-flex;
  align-items: center;
}

@media (max-width: 1100px) {
  header.topbar {
    gap: 12px;
  }

  .brand-group {
    min-width: 0;
  }

  .brand-title {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
  }
}

@media (max-width: 900px) {
  body.sidebar-open,
  body.top-links-open {
    overflow: hidden;
  }

  header.topbar {
    position: sticky;
    top: 0;
    min-height: 60px;
    padding: 10px 14px;
  }

  .brand-group {
    flex: 1 1 auto;
    gap: 8px;
    flex-wrap: nowrap;
  }

  .brand-title {
    font-size: 0.92rem;
  }

  .brand-domain {
    display: none;
  }

  .mobile-nav-toggle {
    display: inline-block;
    order: 2;
  }

  .top-links {
    display: none;
    width: 100%;
    order: 3;
    gap: 8px;
    padding: 10px 0 2px;
  }

  .top-links.open {
    display: flex;
    flex-direction: column;
    max-height: calc(100vh - 72px);
    overflow-y: auto;
  }

  .top-links a,
  .badge-live {
    width: 100%;
    min-height: 44px;
    align-items: center;
    padding: 11px 12px;
    border: 1px solid var(--border-subtle);
    border-radius: 8px;
    background: var(--bg-card);
  }

  .badge-live {
    display: flex;
  }

  .app-container {
    display: block;
    min-height: auto;
  }

  .sidebar-toggle {
    display: flex;
    position: static;
    width: auto;
    margin: 12px 14px;
    justify-content: center;
  }

  table.data-table {
    font-size: 0.82rem;
  }

  table.data-table th,
  table.data-table td {
    padding: 8px 10px;
  }

  aside.sidebar {
    position: fixed;
    inset: 0 auto 0 0;
    display: flex;
    width: min(88vw, 360px);
    height: 100vh;
    max-height: none;
    z-index: 101;
    transform: translateX(-102%);
    transition: transform 220ms var(--ease);
    box-shadow: 24px 0 80px rgba(0, 0, 0, 0.45);
  }

  aside.sidebar.open {
    transform: translateX(0);
  }

  .sidebar-backdrop {
    position: fixed;
    inset: 0;
    z-index: 100;
    background: rgba(0, 0, 0, 0.54);
    border: 0;
    opacity: 0;
    pointer-events: none;
    transition: opacity 180ms var(--ease);
  }

  .sidebar-backdrop.open {
    opacity: 1;
    pointer-events: auto;
  }

  .search-box {
    padding: 18px 16px;
  }

  .nav-link {
    padding: var(--sp-3) var(--sp-4);
    min-height: 44px;
  }

  main.main-viewport {
    padding: 24px 16px 76px;
  }

  h1.hero-title {
    max-width: none;
  }

  h2.section-heading {
    align-items: flex-start;
    gap: 10px;
  }

  .card,
  .scenario-card {
    padding: var(--sp-5);
  }

  #tracker:not(:empty),
  .tracker-card:not(:empty) {
    align-items: stretch;
    flex-direction: column;
  }

  .tracker-progress {
    min-width: 0;
  }

  .btn,
  .jump-select-wrap,
  select.jump-select,
  .scenario-reveal-btn {
    width: 100%;
    max-width: none;
  }

  .btn {
    white-space: normal;
    text-align: center;
  }

  .jump-select-wrap {
    min-width: 0;
  }

  .scenario-option {
    padding: 12px;
  }

  .reading-tools {
    right: 10px;
    bottom: 10px;
    gap: 2px;
    padding: 5px;
    opacity: 0.72;
  }

  .reading-tools:focus-within {
    opacity: 1;
  }

  .reading-tools button {
    width: 34px;
    height: 34px;
    font-size: 0.82rem;
  }

  .resume-reading {
    left: 10px;
    right: 10px;
    bottom: 58px;
    transform: translateY(120%);
    max-width: none;
    border-radius: 12px;
  }

  .resume-reading.shown {
    transform: translateY(0);
  }

  .day-nav {
    display: grid;
    grid-template-columns: 1fr;
  }

  .day-nav span:empty {
    display: none;
  }

  .day-nav a,
  .day-nav .btn {
    width: 100%;
    justify-content: center;
    text-align: center;
    white-space: normal;
  }
}

@media (max-width: 640px) {
  :root {
    --reading-width: 100%;
  }

  body {
    line-height: 1.65;
    background-size: 24px 24px;
  }

  .brand-logo {
    padding: 6px 9px;
    font-size: 0.9rem;
  }

  .content-wrapper.reading p {
    font-size: 1.02rem;
    line-height: 1.78;
  }

  .reading-tools {
    display: none;
  }

  .resume-reading {
    bottom: 12px;
  }

  section.doc-section {
    margin-bottom: 48px;
  }

  .table-container {
    overflow-x: visible;
    border: 0;
    box-shadow: none;
    background: transparent;
  }

  .table-container::after {
    display: none;
  }

  table.data-table,
  table.data-table thead,
  table.data-table tbody,
  table.data-table th,
  table.data-table td,
  table.data-table tr {
    display: block;
  }

  table.data-table {
    min-width: 0;
    border-collapse: separate;
    border-spacing: 0 12px;
  }

  table.data-table thead {
    position: absolute;
    width: 1px;
    height: 1px;
    overflow: hidden;
    clip: rect(0 0 0 0);
    white-space: nowrap;
  }

  table.data-table tr {
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: 10px;
    box-shadow: var(--shadow-card);
    overflow: hidden;
  }

  table.data-table td {
    display: grid;
    grid-template-columns: minmax(7.5rem, 38%) 1fr;
    gap: 12px;
    align-items: start;
    padding: 12px 14px;
    border-bottom: 1px solid var(--border-subtle);
    overflow-wrap: anywhere;
  }

  table.data-table td::before {
    content: attr(data-label);
    color: var(--text-main);
    font-family: var(--font-heading);
    font-size: 0.78rem;
    font-weight: 700;
    line-height: 1.35;
  }

  table.data-table tr:last-child td {
    border-bottom: 1px solid var(--border-subtle);
  }

  table.data-table td:last-child {
    border-bottom: 0;
  }

  table.data-table tr:hover td {
    background: transparent;
  }

  table.data-table tr.today-row {
    border-color: rgba(249, 115, 22, 0.46);
  }

  table.data-table tr.today-row td {
    background: rgba(249, 115, 22, 0.08);
  }
}

@media (max-width: 380px) {
  main.main-viewport {
    padding-left: 12px;
    padding-right: 12px;
  }

  .card,
  .scenario-card {
    padding: var(--sp-4);
  }

  table.data-table td {
    grid-template-columns: 1fr;
    gap: 5px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .resume-reading,
  .sidebar-backdrop,
  aside.sidebar {
    transition: none;
  }
}

/* ==== Motion graphics pass ==== */

header.topbar { position: sticky; overflow: visible; }
header.topbar::after {
  content: '';
  position: absolute;
  left: 0; right: 0; bottom: -1px;
  height: 2px;
  background: linear-gradient(90deg, var(--accent-orange), var(--accent-blue), var(--accent-purple), var(--accent-green), var(--accent-orange));
  background-size: 300% 100%;
  animation: topbarShimmer 14s linear infinite;
  opacity: 0.7;
}
@keyframes topbarShimmer { 0% { background-position: 0% 0; } 100% { background-position: 300% 0; } }

.doc-section.reveal-init { opacity: 0; transform: translateY(20px); transition: opacity 650ms var(--ease), transform 650ms var(--ease); }
.doc-section.reveal-visible { opacity: 1; transform: none; }

.card, .scenario-card {
  transition: transform 220ms var(--ease), box-shadow 220ms var(--ease), border-color 200ms var(--ease);
}
.card:hover, .scenario-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 16px 36px -18px rgba(0, 0, 0, 0.4);
  border-color: var(--accent-blue);
}

.btn-green {
  animation: ctaGlow 3.4s ease-in-out infinite;
}
@keyframes ctaGlow {
  0%, 100% { box-shadow: 0 0 0 0 color-mix(in srgb, var(--accent-green) 45%, transparent); }
  50% { box-shadow: 0 0 0 6px color-mix(in srgb, var(--accent-green) 0%, transparent); }
}

.pill {
  transition: transform 180ms var(--ease);
}
.pill:hover { transform: translateY(-1px); }

@media (prefers-reduced-motion: reduce) {
  header.topbar::after { animation: none; }
  .btn-green { animation: none; }
}

/* ---- Tactile press feedback (apple-design: respond on press, not release) ---- */
.btn:active { transform: scale(0.96); transition-duration: 90ms; }
.card:active, .scenario-card:active { transform: translateY(-1px) scale(0.99); transition-duration: 90ms; }
.nav-link:active { transform: scale(0.98); }