/* ============================================
   HAADHI IRFAN — PORTFOLIO DESIGN SYSTEM
   "The Ledger" — see DESIGN.md
   ============================================ */

/* ---------- CSS Custom Properties ---------- */
:root {
  color-scheme: dark; /* native form controls (select popups, scrollbars) follow the dark theme */
  --bg-primary: #0a0a0a;
  --bg-secondary: #141414;
  --text-primary: #eae7e0;
  --text-secondary: #8a8783;
  --accent: #c9974f;
  --accent-tint: rgba(201, 151, 79, 0.1);
  --accent-tint-strong: rgba(201, 151, 79, 0.2);
  --card-hover: rgba(201, 151, 79, 0.04);
  --card-border: rgba(201, 151, 79, 0.12);
  --shadow-ambient: rgba(0, 0, 0, 0.55);
  --border-neutral: #2a2a2a;
  --font-sans: 'Libre Franklin', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'Spline Sans Mono', ui-monospace, 'SFMono-Regular', Consolas, 'Liberation Mono', monospace;
  --transition-base: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  --mouse-x: 50%;
  --mouse-y: 50%;
}

/* ---------- Global Reset ---------- */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 6rem;
}

body {
  background-color: var(--bg-primary);
  color: var(--text-secondary);
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

::selection {
  background: var(--accent-tint-strong);
  color: var(--accent);
}

a {
  color: inherit;
  text-decoration: none;
}

ul, ol {
  list-style: none;
}

img {
  max-width: 100%;
  display: block;
}

/* ---------- Screen Reader Only ---------- */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border-width: 0;
}

/* ============================================
   CURSOR SPOTLIGHT
   ============================================ */
.spotlight {
  position: fixed;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  background: radial-gradient(
    600px circle at var(--mouse-x) var(--mouse-y),
    var(--accent-tint),
    transparent 80%
  );
  opacity: 0;
  transition: opacity 0.4s;
}

/* ============================================
   LAYOUT — Split Screen
   ============================================ */
.layout {
  position: relative;
  z-index: 2;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 1.5rem;
  min-height: 100vh;
}

/* ============================================
   SIDEBAR
   ============================================ */
.sidebar {
  padding: 3rem 0 1.5rem;
}

.sidebar-content {
  display: flex;
  flex-direction: column;
}

.sidebar-top {
  flex: 1;
}

.sidebar-name {
  font-size: clamp(2.5rem, 5vw, 3.2rem);
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.02em;
  line-height: 1.1;
}

.sidebar-title {
  font-size: 1.15rem;
  font-weight: 500;
  color: var(--text-primary);
  margin-top: 0.75rem;
  letter-spacing: -0.01em;
}

.sidebar-tagline {
  margin-top: 1rem;
  max-width: 320px;
  font-size: 0.95rem;
  line-height: 1.6;
  color: var(--text-secondary);
}

/* ---------- Navigation ---------- */
.nav {
  display: none;
}

.nav-list {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.nav-link {
  display: flex;
  align-items: center;
  padding: 0.75rem 0;
  cursor: pointer;
  transition: all var(--transition-base);
  outline: none;
}

.nav-link:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 4px;
  border-radius: 4px;
}

.nav-indicator {
  display: inline-block;
  height: 1px;
  width: 2rem;
  background: var(--text-secondary);
  margin-right: 1rem;
  transition: all var(--transition-base);
}

.nav-text {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-secondary);
  transition: color var(--transition-base);
}

.nav-link:hover .nav-indicator,
.nav-link.active .nav-indicator {
  width: 4rem;
  background: var(--text-primary);
}

.nav-link:hover .nav-text,
.nav-link.active .nav-text {
  color: var(--text-primary);
}

.nav-link.active .nav-indicator {
  background: var(--accent);
}

.nav-link.active .nav-text {
  color: var(--text-primary);
}

/* ---------- Social Links ---------- */
.social-links {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  margin-top: 2rem;
  margin-left: -0.65rem; /* pull first 44px hit-area flush with the text above */
}

.social-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 44px;
  min-height: 44px;
  color: var(--text-secondary);
  transition: color var(--transition-base), transform var(--transition-base);
}

.social-link:hover {
  color: var(--accent);
  transform: translateY(-2px);
}

.social-link svg {
  width: 1.4rem;
  height: 1.4rem;
}

/* ============================================
   MAIN CONTENT
   ============================================ */
.content {
  padding: 1rem 0 3rem;
}

/* ============================================
   SECTIONS
   ============================================ */
.section {
  margin-bottom: 5rem;
  scroll-margin-top: 5rem;
}

/* ---------- Section Headers (mobile sticky) ---------- */
.section-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(10, 10, 10, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  padding: 1rem 1.5rem;
  margin: 0 -1.5rem 1.5rem;
}

.section-title {
  font-family: var(--font-mono);
  font-size: 0.875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-primary);
}

/* ============================================
   ABOUT SECTION
   ============================================ */
.about-text {
  margin-bottom: 1rem;
  font-size: 0.95rem;
  line-height: 1.7;
}

.about-text:last-child {
  margin-bottom: 0;
}

.inline-link {
  color: var(--text-primary);
  font-weight: 500;
  transition: color var(--transition-base);
  position: relative;
}

.inline-link::after {
  content: '';
  position: absolute;
  bottom: -1px;
  left: 0;
  width: 100%;
  height: 1px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: right;
  transition: transform var(--transition-base);
}

.inline-link:hover {
  color: var(--accent);
}

.inline-link:hover::after {
  transform: scaleX(1);
  transform-origin: left;
}

.highlight {
  color: var(--accent);
  font-weight: 500;
}

/* ============================================
   CARDS (Experience & Projects)
   ============================================ */
.card-list {
  display: flex;
  flex-direction: column;
}

.card {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.25rem;
  padding: 1.25rem;
  border-radius: 0.5rem;
  position: relative;
  isolation: isolate;
  transition: all var(--transition-base);
  cursor: default;
}

.card::before {
  content: '';
  position: absolute;
  inset: 0;
  z-index: -1;
  border-radius: 0.5rem;
  opacity: 0;
  background: var(--card-hover);
  box-shadow: inset 0 1px 0 0 var(--card-border);
  filter: drop-shadow(0 10px 8px var(--shadow-ambient));
  transition: opacity var(--transition-base);
  pointer-events: none;
}

.card:hover::before {
  opacity: 1;
}

/* Card list dims siblings on hover so the one you're reading stays lit */
.card-list:hover .card {
  opacity: 0.5;
}

.card-list:hover .card:hover {
  opacity: 1;
}

.card-list .card {
  transition: opacity var(--transition-base), background var(--transition-base);
}

/* ---------- Card Date ---------- */
.card-date {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  font-feature-settings: "tnum" 1;
  color: var(--text-secondary);
  padding-top: 0.35rem;
  white-space: nowrap;
}

/* ---------- Card Title ---------- */
.card-title {
  font-size: 1rem;
  font-weight: 500;
  color: var(--text-primary);
  line-height: 1.4;
  display: inline-flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 0.15rem;
  transition: color var(--transition-base);
}

.card:hover .card-title {
  color: var(--accent);
}

.card-company {
  font-weight: 400;
}

.card-arrow {
  display: inline-block;
  width: 1rem;
  height: 1rem;
  flex-shrink: 0;
  margin-left: 0.25rem;
  transition: transform var(--transition-base);
  translate: 0 2px;
}

.card:hover .card-arrow {
  transform: translate(3px, -3px);
}

/* ---------- Card Subtitle ---------- */
.card-subtitle {
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text-secondary);
  margin-top: 0.25rem;
  font-style: italic;
}

/* ---------- Card Description ---------- */
.card-description {
  font-size: 0.875rem;
  line-height: 1.6;
  color: var(--text-secondary);
  margin-top: 0.5rem;
}

/* ============================================
   TECH PILLS
   ============================================ */
.pills {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 0.75rem;
}

.pill {
  display: inline-flex;
  align-items: center;
  padding: 0.25rem 0.75rem;
  border-radius: 9999px;
  background: var(--accent-tint);
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 500;
  line-height: 1.5;
  white-space: nowrap;
}

/* ============================================
   EDUCATION CARDS
   ============================================ */
.edu-card {
  cursor: default;
}

.edu-institution {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--accent);
  margin-top: 0.25rem;
}

.edu-details {
  margin-top: 0.5rem;
  font-size: 0.875rem;
}

.edu-details li {
  padding: 0.15rem 0;
  color: var(--text-secondary);
  position: relative;
  padding-left: 1.25rem;
}

.edu-details li::before {
  content: '▹';
  position: absolute;
  left: 0;
  color: var(--accent);
  font-size: 0.75rem;
}

.edu-highlight {
  color: var(--accent);
  font-weight: 600;
}

/* ============================================
   SKILLS GRID
   ============================================ */
.skills-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
}

.skill-category {
  margin-bottom: 0.5rem;
}

.skill-category-title {
  font-family: var(--font-mono);
  font-size: 0.875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--text-primary);
  margin-bottom: 0.75rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.skill-category-title::before {
  content: '';
  display: inline-block;
  width: 1.5rem;
  height: 1px;
  background: var(--accent);
  flex-shrink: 0;
}

/* ============================================
   CONTACT SECTION
   ============================================ */
.contact-section {
  margin-bottom: 2rem;
}

.contact-content {
  text-align: center;
  max-width: 480px;
  margin: 0 auto;
  padding: 2rem 0;
}

.contact-heading {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 1rem;
  letter-spacing: -0.02em;
}

.contact-text {
  font-size: 0.95rem;
  line-height: 1.7;
  color: var(--text-secondary);
  margin-bottom: 2.5rem;
}

/* The one place the seal becomes a stamp: primary CTA is a solid brass fill */
.contact-cta {
  display: inline-block;
  padding: 1rem 2.25rem;
  background: var(--accent);
  border: 1px solid var(--accent);
  color: var(--bg-primary);
  border-radius: 6px;
  font-size: 0.875rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  transition: transform var(--transition-base), box-shadow var(--transition-base);
  position: relative;
  overflow: hidden;
}

.contact-cta::before {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.12); /* subtle darkening sheen on hover */
  opacity: 0;
  transition: opacity var(--transition-base);
}

.contact-cta:hover::before {
  opacity: 1;
}

.contact-cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 20px rgba(201, 151, 79, 0.15);
}

/* ============================================
   FOOTER
   ============================================ */
.footer {
  text-align: center;
  padding: 3rem 0;
  font-size: 0.8rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

.footer a {
  color: var(--text-primary);
  font-weight: 500;
  transition: color var(--transition-base);
}

.footer a:hover {
  color: var(--accent);
}

/* ============================================
   SCROLL ANIMATIONS
   ============================================ */
.fade-up {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-up.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ============================================
   MOBILE NAV (jump menu, native popover)
   ============================================ */
.mobile-nav-toggle {
  display: none; /* desktop: sidebar nav handles it */
}

/* ponytail: native popover API; unsupported browsers keep display:none and
   fall back to the sticky section headers — no JS menu machinery */
.mobile-nav {
  display: none;
}

.mobile-nav:popover-open {
  display: block;
  position: fixed;
  inset: auto auto calc(4.75rem + env(safe-area-inset-bottom)) 1rem;
  margin: 0;
  padding: 0.5rem 1.5rem;
  background: var(--bg-secondary);
  border: 1px solid var(--border-neutral);
  border-radius: 8px;
  box-shadow: 0 10px 30px var(--shadow-ambient);
}

.mobile-nav::backdrop {
  background: rgba(0, 0, 0, 0.45);
}

.mobile-nav .nav-link {
  min-height: 44px;
}

@media (max-width: 1023px) {
  .mobile-nav-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    position: fixed;
    left: 1rem;
    bottom: max(1.25rem, env(safe-area-inset-bottom));
    z-index: 25; /* above sticky section headers (20), below chat widget (1000) */
    min-width: 44px;
    min-height: 44px;
    padding: 0.6rem 1.1rem;
    background: var(--bg-secondary);
    border: 1px solid var(--border-neutral);
    border-radius: 999px;
    font-family: var(--font-mono);
    font-size: 0.7rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--text-primary);
    cursor: pointer;
    box-shadow: 0 6px 20px var(--shadow-ambient);
  }
}

/* ============================================
   RESPONSIVE — TABLET (768px+)
   ============================================ */
@media (min-width: 768px) {
  .layout {
    padding: 0 3rem;
  }

  .section-header {
    margin: 0 -3rem 1.5rem;
    padding-left: 3rem;
    padding-right: 3rem;
  }

  .card {
    grid-template-columns: 130px 1fr;
    gap: 0.5rem 1rem;
    padding: 1.5rem;
  }

  .skills-grid {
    grid-template-columns: 1fr 1fr;
  }
}

/* ============================================
   RESPONSIVE — DESKTOP (1024px+)
   ============================================ */
@media (min-width: 1024px) {
  .layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
    padding: 0 3rem;
  }

  .sidebar {
    position: sticky;
    top: 0;
    height: 100vh;
    padding: 6rem 0;
  }

  .sidebar-content {
    height: 100%;
    justify-content: space-between;
  }

  /* Show navigation on desktop */
  .nav {
    display: block;
    margin-top: 3rem;
  }

  /* Hide section headers on desktop (nav handles it) */
  .section-header {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
    background: none;
    backdrop-filter: none;
  }

  .content {
    padding: 6rem 0 6rem 2rem;
  }

  .section {
    margin-bottom: 8rem;
    scroll-margin-top: 6rem;
  }

  /* Show spotlight on desktop */
  .spotlight {
    opacity: 1;
  }

  .social-links {
    margin-top: auto;
  }
}

/* ============================================
   RESPONSIVE — LARGE DESKTOP (1280px+)
   ============================================ */
@media (min-width: 1280px) {
  .layout {
    padding: 0 6rem;
    gap: 2rem;
  }

  .content {
    padding-left: 3rem;
  }
}

/* ============================================
   FOCUS VISIBLE STYLES
   ============================================ */
a:focus-visible,
button:focus-visible,
canvas:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 4px;
}

/* ============================================
   REDUCED MOTION
   ============================================ */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  html {
    scroll-behavior: auto;
  }

  .fade-up {
    opacity: 1;
    transform: none;
  }

  .spotlight {
    display: none;
  }
}

/* ============================================
   DETAIL & ARCHIVE PAGES
   ============================================ */
.page {
  position: relative;
  z-index: 2;
  max-width: 780px;
  margin: 0 auto;
  padding: 4rem 1.5rem 5rem;
}

.back-link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--accent);
  margin-bottom: 2rem;
  transition: transform var(--transition-base);
}

.back-link:hover {
  transform: translateX(-4px);
}

.page-title {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.02em;
  line-height: 1.2;
}

.page-meta {
  margin-top: 0.75rem;
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.page-meta .highlight {
  font-weight: 600;
}

.page .edu-details {
  margin-top: 1.5rem;
}

.page .edu-details li {
  padding: 0.4rem 0 0.4rem 1.25rem;
  font-size: 0.95rem;
  line-height: 1.7;
}

.page-section-label {
  margin-top: 2.5rem;
  font-family: var(--font-mono);
  font-size: 0.875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-primary);
}

/* ---------- Archive table ---------- */
.archive-table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 2rem;
}

.archive-table th {
  text-align: left;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-primary);
  padding: 0.6rem 0.75rem;
  border-bottom: 1px solid var(--card-border);
}

.archive-table td {
  padding: 0.85rem 0.75rem;
  font-size: 0.875rem;
  border-bottom: 1px solid var(--border-neutral);
  vertical-align: top;
}

.archive-table td.year {
  font-family: var(--font-mono);
  font-feature-settings: "tnum" 1;
  color: var(--text-secondary);
  white-space: nowrap;
}

.archive-table td.title {
  color: var(--text-primary);
  font-weight: 500;
}

.archive-table td.title a {
  transition: color var(--transition-base);
}

.archive-table td.title a:hover {
  color: var(--accent);
}

.archive-table .pills {
  margin-top: 0;
}

@media (max-width: 767px) {
  .archive-table .col-tech {
    display: none;
  }
}

/* ---------- Archive CTA link (main page) ---------- */
.archive-cta {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  margin-top: 1.5rem;
  padding-left: 1.25rem;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-primary);
  transition: color var(--transition-base);
}

.archive-cta:hover {
  color: var(--accent);
}

.archive-cta:hover .card-arrow {
  transform: translate(3px, -3px);
}

/* ---------- Metrics strip (About) ---------- */
.metrics {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
  margin-top: 2rem;
}

@media (min-width: 768px) {
  .metrics {
    grid-template-columns: repeat(4, 1fr);
  }
}

.metric {
  padding: 1rem;
  border-radius: 0.5rem;
  background: var(--accent-tint);
  text-align: center;
}

.metric-value {
  display: block;
  font-family: var(--font-mono);
  font-size: 1.35rem;
  font-weight: 600;
  font-feature-settings: "tnum" 1;
  color: var(--accent);
  letter-spacing: -0.01em;
}

.metric-label {
  display: block;
  margin-top: 0.25rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-secondary);
}

/* ---------- Card link (whole card clickable) ---------- */
.card-link::after {
  content: '';
  position: absolute;
  inset: 0;
  z-index: 3;
  border-radius: 0.5rem;
}

/* ---------- Prototype demos (detail pages) ---------- */
.demo {
  margin-top: 1rem;
  padding: 1.25rem;
  border: 1px solid var(--card-border);
  border-radius: 0.5rem;
  background: rgba(20, 20, 20, 0.6);
}

.demo-controls {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem 1.25rem;
  margin-bottom: 1rem;
}

.demo-controls label {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-secondary);
}

.demo input[type="range"] {
  accent-color: var(--accent);
  width: 140px;
}

.demo select {
  background: var(--bg-primary);
  color: var(--text-primary);
  border: 1px solid var(--border-neutral);
  border-radius: 6px;
  padding: 0.3rem 0.5rem;
  font-size: 0.8rem;
  font-family: inherit;
}

.demo-btn {
  padding: 0.4rem 1rem;
  border: 1px solid var(--accent);
  border-radius: 6px;
  background: none;
  color: var(--accent);
  font-size: 0.8rem;
  font-weight: 600;
  font-family: inherit;
  cursor: pointer;
  transition: background var(--transition-base);
}

.demo-btn:hover:not(:disabled) {
  background: var(--accent-tint);
}

.demo-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.demo canvas {
  display: block;
  width: 100%;
  height: auto;
  background: var(--bg-primary);
  border-radius: 0.4rem;
}

.demo-readout {
  margin-top: 0.75rem;
  font-size: 0.875rem;
  color: var(--text-primary);
}

.demo-readout .highlight {
  font-weight: 600;
}

.demo-list {
  margin-top: 0.5rem;
  font-size: 0.85rem;
}

.demo-list li {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.35rem 0;
  border-bottom: 1px solid var(--border-neutral);
}

.demo-bar {
  display: block; /* inline spans ignore width — bars nested in wrappers were invisible */
  height: 8px;
  border-radius: 4px;
  background: var(--accent);
  transition: width 0.4s ease;
}

.demo-code {
  display: block;
  background: var(--bg-primary);
  border-radius: 0.4rem;
  padding: 0.9rem 1rem;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  line-height: 1.6;
  color: var(--text-primary);
  overflow-x: auto;
  white-space: pre;
}

.demo-note {
  margin-top: 0.75rem;
  font-size: 0.75rem;
  color: var(--text-secondary);
  font-style: italic;
}

.demo-help {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1.15rem;
  height: 1.15rem;
  border: 1px solid var(--card-border);
  border-radius: 50%;
  color: var(--accent);
  font-size: 0.75rem;
  font-weight: 700;
  cursor: help;
  flex-shrink: 0;
}

@media (max-width: 480px) {
  .demo-list li {
    flex-wrap: wrap;
  }

  .demo input[type="range"] {
    width: 110px;
  }
}

/* ===== Chatbot widget ===== */
.chat-toggle{position:fixed;bottom:24px;right:24px;width:56px;height:56px;border-radius:50%;
  border:none;background:var(--accent);color:var(--bg-primary);display:flex;align-items:center;justify-content:center;
  cursor:pointer;box-shadow:0 6px 20px rgba(0,0,0,.35);z-index:1000}
.chat-toggle svg{width:24px;height:24px}
.chat-panel{position:fixed;bottom:92px;right:24px;width:min(360px,calc(100vw - 48px));height:480px;
  max-height:calc(100vh - 120px);background:var(--bg-secondary);border:1px solid var(--border-neutral);border-radius:12px;
  display:flex;flex-direction:column;overflow:hidden;z-index:1000;box-shadow:0 10px 30px rgba(0,0,0,.45)}
.chat-panel[hidden]{display:none} /* ponytail: class display:flex beats UA [hidden], so re-assert it */
.chat-header{display:flex;justify-content:space-between;align-items:center;padding:12px 16px;
  background:var(--bg-primary);color:var(--text-primary);font-weight:600;border-bottom:1px solid var(--border-neutral)}
.chat-close{background:none;border:none;color:var(--text-secondary);font-size:1.35rem;cursor:pointer;line-height:1}
.chat-log{flex:1;overflow-y:auto;padding:16px;display:flex;flex-direction:column;gap:10px}
.chat-msg{max-width:85%;padding:8px 12px;border-radius:8px;font-size:0.875rem;line-height:1.45;white-space:pre-wrap}
.chat-msg.user{align-self:flex-end;background:var(--accent);color:var(--bg-primary)}
.chat-msg.bot{align-self:flex-start;background:#1e1e1e;color:var(--text-primary)}
.chat-msg.bot.pending{opacity:.6;font-style:italic}
.chat-form{display:flex;gap:8px;padding:12px;border-top:1px solid var(--border-neutral)}
.chat-input{flex:1;background:var(--bg-primary);border:1px solid var(--border-neutral);border-radius:8px;padding:8px 10px;
  color:var(--text-primary);font-size:0.875rem}
.chat-input:focus{outline:none;border-color:var(--accent)}
.chat-send{background:var(--accent);color:var(--bg-primary);border:none;border-radius:8px;padding:0 14px;font-weight:600;cursor:pointer}
.chat-send:disabled{opacity:.5;cursor:not-allowed}