/* ============================================================
   EARN THE REST — Duolingo PRD
   Visual format: duolingoproject.rakshitagupta.com
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Nunito:ital,wght@0,400;0,600;0,700;0,800;0,900;1,700;1,800;1,900&display=swap');

/* ---- Smooth scroll + overflow lock ---- */
html {
  scroll-behavior: smooth;
  overflow-x: hidden;
}

/* body must NOT have overflow-x: hidden — it silently creates a new scroll container
   in some browsers, which traps position:sticky inside it and prevents it from
   sticking to the viewport. Horizontal overflow is already handled by html above. */
body {
  overflow-x: visible;
}

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

/* ---- Base ---- */
body {
  font-family: 'Nunito', sans-serif;
  background: #f0f0f0;
  color: #222222;
  font-size: 16px;
  line-height: 1.65;
}

/* ---- Layout: floating TOC card beside document ---- */
.layout {
  display: flex;
  align-items: flex-start;
  max-width: 1100px;
  margin: 0 auto;
  gap: 20px;
}

/* ---- Page Wrapper ---- */
.page {
  flex: 1;
  min-width: 0;
  background: #ffffff;
  overflow-x: hidden;
}

/* ---- Global image guard ---- */
img {
  max-width: 100%;
  height: auto;
}

/* ---- Scroll offset for headings ---- */
.page h1,
.page h2,
.page h3 {
  scroll-margin-top: 32px;
}

/* ============================================================
   FLOATING TOC CARD — Duolingo brand style
   ============================================================ */

.toc-sidebar {
  width: 220px;
  flex-shrink: 0;
  align-self: flex-start;      /* card only as tall as its content */
  position: sticky;
  top: 24px;
  background: #ffffff;
  border: 1.5px solid #e5e5e5;
  border-radius: 16px;
  overflow: hidden;            /* clips children to rounded corners */
}

/* TOC list */
.toc-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.toc-item {
  border-bottom: 1.5px solid #e5e5e5;
}

.toc-item:last-child {
  border-bottom: none;
}

/* TOC links — Duolingo row layout with right-side chevron */
.toc-item a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  padding: 13px 14px 13px 18px;
  font-size: 0.875rem;
  font-weight: 800;
  color: #3c3c3c;
  text-decoration: none;
  line-height: 1.3;
  transition: background-color 0.12s, color 0.12s;
}

.toc-item a span { flex: 1; }

.toc-item a:hover { background-color: #f7f7f7; }

.toc-item a:focus-visible {
  outline: 2px solid #58cc02;
  outline-offset: -2px;
}

/* Chevron icon */
.toc-chevron {
  flex-shrink: 0;
  opacity: 0.45;
  transition: opacity 0.12s, color 0.12s;
}

/* Active — Duolingo green */
.toc-item a.toc-active            { color: #58cc02; }
.toc-item a.toc-active .toc-chevron { opacity: 0.75; }
.toc-item a.toc-active:hover      { background-color: #f0fce8; }

/* ---- Header ---- */
.header {
  background: #58cc02;
  padding: 48px 48px 40px;
  text-align: center;
}

.header-banner {
  width: 100%;
  max-width: 600px;
  border-radius: 12px;
  margin: 0 auto 28px;
  display: block;
}

.header h1 {
  font-size: 2.2rem;
  font-weight: 900;
  font-style: italic;
  color: #ffffff;
  line-height: 1.2;
  margin-bottom: 12px;
}

.header .subtitle {
  font-size: 1rem;
  font-weight: 700;
  color: rgba(255, 255, 255, 0.88);
  letter-spacing: 0.02em;
  margin-bottom: 8px;
}

.header .byline {
  font-size: 0.9rem;
  font-weight: 500;
  color: rgba(255, 255, 255, 0.72);
}

/* ---- Regular Section (white background) ---- */
.section {
  padding: 40px 48px;
  border-bottom: 1px solid #eeeeee;
}

.section:last-of-type {
  border-bottom: none;
}

/* ---- Section Bands (numbered chapter headers) ---- */
.section-band {
  padding: 40px 48px;
  border-bottom: 1px solid rgba(0, 0, 0, 0.08);
}

.section-band.green  { background: #58cc02; }
.section-band.blue   { background: #1cb0f6; }
.section-band.yellow { background: #ffc800; }
.section-band.dark   { background: #2d2d2d; }

.section-band-title {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 10px;
}

.section-num {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 900;
  font-size: 1.2rem;
  flex-shrink: 0;
}

.section-band.green  .section-num { color: #58cc02; }
.section-band.blue   .section-num { color: #1cb0f6; }
.section-band.yellow .section-num { color: #d4a700; }
.section-band.dark   .section-num { color: #2d2d2d; }

.section-band h2 {
  font-size: 1.55rem;
  font-weight: 900;
  font-style: italic;
  color: #ffffff;
  margin-bottom: 0;
}

.section-band.yellow h2 { color: #333333; }

.section-band .band-intro {
  font-size: 0.95rem;
  color: rgba(255, 255, 255, 0.88);
  margin-top: 4px;
}

.section-band.yellow .band-intro { color: rgba(0, 0, 0, 0.65); }
.section-band.dark   .band-intro { color: rgba(255, 255, 255, 0.75); }

/* ---- Typography ---- */
h2 {
  font-size: 1.35rem;
  font-weight: 900;
  color: #222222;
  margin-bottom: 16px;
}

h3 {
  font-size: 1.05rem;
  font-weight: 800;
  color: #222222;
  margin-bottom: 10px;
}

h4 {
  font-size: 0.72rem;
  font-weight: 800;
  color: #888888;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  margin-bottom: 8px;
}

p {
  color: #444444;
  margin-bottom: 14px;
}

p:last-child {
  margin-bottom: 0;
}

strong {
  font-weight: 800;
  color: #222222;
}

a {
  color: #1cb0f6;
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

ul, ol {
  margin: 12px 0 14px 22px;
}

li {
  color: #444444;
  margin-bottom: 6px;
}

li strong {
  color: #222222;
}

/* ---- Quote Blocks ---- */
.quote-block {
  border-left: 4px solid #58cc02;
  background: #f5f5f5;
  padding: 14px 18px;
  margin: 10px 0;
  border-radius: 0 8px 8px 0;
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 16px;
}

.quote-block p {
  font-style: italic;
  color: #444444;
  margin-bottom: 0;
  flex: 1;
}

.quote-block .source-tag {
  font-style: normal;
  font-size: 0.75rem;
  color: #888;
  margin-top: 4px;
  white-space: nowrap;
}

/* ---- Source Badges ---- */
.source-badge {
  display: inline-block;
  font-size: 0.68rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 4px 10px;
  border-radius: 20px;
  white-space: nowrap;
  flex-shrink: 0;
  margin-top: 1px;
}

.source-badge.founder  { background: #58cc02; color: #ffffff; }
.source-badge.earnings { background: #1cb0f6; color: #ffffff; }
.source-badge.reddit   { background: #ff4b4b; color: #ffffff; }
.source-badge.data     { background: #ffc800; color: #333333; }
.source-badge.signal   { background: #8549ba; color: #ffffff; }
.source-badge.community{ background: #ff9600; color: #ffffff; }

/* ---- HMW Box ---- */
.hmw-box {
  background: #e8f9d7;
  border: 1px solid #c5eea5;
  border-radius: 12px;
  padding: 20px 24px;
  margin: 20px 0 0;
}

.hmw-box p {
  color: #2a7a00;
  font-style: italic;
  font-weight: 700;
  font-size: 0.97rem;
  margin-bottom: 0;
}

/* ---- Two-Column Card Grid ---- */
.card-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-top: 16px;
}

.card {
  background: #f8f8f8;
  border-radius: 12px;
  padding: 20px 24px;
  border: 1px solid #eeeeee;
}

/* ---- Solution Cards (colored top border) ---- */
.solution-card {
  background: #ffffff;
  border-radius: 16px;
  padding: 28px 32px;
  margin: 0 0 24px;
  box-shadow: 0 1px 8px rgba(0, 0, 0, 0.08);
}

.solution-card:last-child {
  margin-bottom: 0;
}

.solution-card.blue-top   { border-top: 4px solid #1cb0f6; }
.solution-card.yellow-top { border-top: 4px solid #ffc800; }
.solution-card.red-top    { border-top: 4px solid #ff4b4b; }

.solution-label {
  font-size: 0.72rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 6px;
}

.solution-card.blue-top   .solution-label { color: #1cb0f6; }
.solution-card.yellow-top .solution-label { color: #d4a700; }
.solution-card.red-top    .solution-label { color: #ff4b4b; }

.solution-card h3 {
  font-size: 1.2rem;
  font-weight: 900;
  margin-bottom: 14px;
}

.solution-sub {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  margin-top: 18px;
}

.sub-card {
  background: #f8f8f8;
  border-radius: 10px;
  padding: 16px 18px;
}

.sub-card h4 {
  margin-bottom: 6px;
}

.sub-card p {
  font-size: 0.92rem;
  margin-bottom: 0;
}

.sub-card.full-width {
  grid-column: 1 / -1;
}

/* ---- Hamburger button — desktop: hidden ---- */
.toc-hamburger {
  display: none;
}

/* ---- Backdrop — invisible/inactive on desktop ---- */
.toc-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.45);
  z-index: 98;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s;
}

.toc-backdrop.toc-open {
  opacity: 1;
  pointer-events: all;
}

/* ---- Drawer close button — desktop: hidden ---- */
.toc-close {
  display: none;
}

/* ---- Body scroll lock when drawer is open ---- */
.toc-body-lock {
  overflow: hidden;
}

/* ---- Solution card body: 4 cards left + prototype right ---- */
.solution-body {
  display: flex;
  gap: 24px;
  align-items: flex-start;
  margin-top: 18px;
}

.solution-left {
  flex: 1;
  min-width: 0;
}

/* sub-cards inside solution-body: single column — left lane is ~226px, no room for 2 cols */
.solution-body .solution-sub {
  margin-top: 0;
  grid-template-columns: 1fr;
}

/* figma-col: right-side flex column containing iframe + hint */
.figma-col {
  flex-shrink: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.figma-col .figma-wrap {
  margin-top: 0;
}

/* Loading hint text below prototype */
.figma-hint {
  font-style: italic;
  opacity: 0.6;
  font-size: 0.875rem; /* 14px — 2px smaller than 16px body */
  color: #444444;
  text-align: center;
  line-height: 1.5;
}

/* ---- Figma Embed ---- */
.figma-wrap {
  margin-top: 24px;
  border-radius: 12px;
  overflow: hidden;
  border: 1px solid rgba(0, 0, 0, 0.1);
}

/* Desktop: 450×830 — max-width: 100% ensures it never overflows its container */
.figma-wrap iframe {
  display: block;
  width: 450px;
  max-width: 100%;
  height: 830px;
  border: none;
}

/* ---- About Me section ---- */
.about-row {
  display: flex;
  gap: 32px;
  align-items: flex-start;
  margin-bottom: 40px;
}

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

/* All about-me columns are equal 50/50 — photos take half the container */
.about-col-2 { flex: 1; min-width: 0; }
.about-col-1 { flex: 1; min-width: 0; }

.about-photo {
  width: 100%;
  display: block;
  border-radius: 20px;
  object-fit: cover;
}

.about-sig {
  margin-top: 24px;
  font-style: italic;
  font-weight: 700;
  color: #444444;
  line-height: 1.8;
}

.about-sig a {
  color: #1cb0f6;
  font-weight: 700;
}

/* ---- Content Images ---- */
.content-image {
  width: 100%;
  border-radius: 12px;
  margin: 20px 0;
  display: block;
  border: 4px solid #ffc800;
}

/* ---- Tables ---- */
.table-wrap {
  overflow-x: auto;
  margin: 20px 0;
  border-radius: 12px;
  box-shadow: 0 1px 6px rgba(0, 0, 0, 0.07);
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.92rem;
}

thead th {
  background: #58cc02;
  color: #ffffff;
  padding: 13px 16px;
  text-align: left;
  font-weight: 800;
  font-size: 0.88rem;
}

thead th:first-child { border-radius: 0; }
thead th:last-child  { border-radius: 0; }

tbody td {
  padding: 13px 16px;
  border-bottom: 1px solid #eeeeee;
  vertical-align: top;
  color: #444444;
}

tbody tr:last-child td {
  border-bottom: none;
}

tbody tr:nth-child(even) td {
  background: #fafafa;
}

/* ---- Risk Levels ---- */
.risk-high   { color: #ff4b4b; font-weight: 800; }
.risk-medium { color: #ff9600; font-weight: 800; }
.risk-low    { color: #58cc02; font-weight: 800; }

/* ---- IF Condition Cards ---- */
.if-card {
  background: #f8f8f8;
  border-radius: 8px;
  padding: 16px 20px;
  margin: 10px 0;
  display: flex;
  gap: 16px;
  align-items: flex-start;
  border: 1px solid #eeeeee;
}

.if-label {
  font-size: 0.75rem;
  font-weight: 900;
  color: #58cc02;
  text-transform: uppercase;
  flex-shrink: 0;
  padding-top: 2px;
  letter-spacing: 0.04em;
}

.if-card p {
  margin-bottom: 0;
  font-size: 0.95rem;
}

/* ---- Roadmap / Phase Items ---- */
.phase-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.phase-item {
  background: #ffffff;
  border-radius: 12px;
  padding: 20px 24px;
  box-shadow: 0 1px 5px rgba(0, 0, 0, 0.07);
  display: flex;
  gap: 20px;
  align-items: flex-start;
}

.phase-pill {
  font-size: 0.75rem;
  font-weight: 800;
  padding: 6px 14px;
  border-radius: 20px;
  white-space: nowrap;
  flex-shrink: 0;
  margin-top: 3px;
  color: #ffffff;
}

.phase-pill.p1 { background: #58cc02; }
.phase-pill.p2 { background: #1cb0f6; }
.phase-pill.p3 { background: #ffc800; color: #333333; }
.phase-pill.p4 { background: #ff4b4b; }

.phase-content h4 {
  font-size: 0.95rem;
  font-weight: 800;
  color: #222222;
  text-transform: none;
  letter-spacing: 0;
  margin-bottom: 6px;
}

.phase-content p {
  font-size: 0.92rem;
  margin-bottom: 0;
}

/* ---- Flow Steps ---- */
.flow-steps {
  counter-reset: flow;
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin: 16px 0;
}

.flow-step {
  display: flex;
  gap: 16px;
  align-items: flex-start;
}

.flow-num {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: #58cc02;
  color: #ffffff;
  font-weight: 900;
  font-size: 0.85rem;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.flow-step p {
  margin-bottom: 0;
  padding-top: 4px;
}

/* ---- Persona / Profile Card ---- */
.persona-card {
  background: #f8f8f8;
  border-radius: 16px;
  padding: 24px;
  margin: 16px 0;
  border: 1px solid #eeeeee;
}

/* ---- Section Divider ---- */
.divider {
  height: 1px;
  background: #eeeeee;
  margin: 24px 0;
}

/* ---- Floating CTA Button ---- */
.fab-container {
  display: none; /* hidden for now — re-enable when needed */
  position: fixed;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 9999;
  width: max-content;
}

.duo-fab {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  background: #58cc02;
  color: #ffffff;
  text-decoration: none;
  font-size: 1.05rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 16px 32px;
  border-radius: 16px;
  box-shadow: #89e219 0 4px 0;
  transition: transform 0.15s cubic-bezier(0.34, 1.56, 0.64, 1),
              box-shadow 0.15s cubic-bezier(0.34, 1.56, 0.64, 1),
              filter 0.15s;
}

.duo-fab:hover {
  filter: brightness(1.08);
  transform: translateY(-2px);
  box-shadow: #89e219 0 6px 0;
  text-decoration: none;
}

.duo-fab:active {
  transform: translateY(4px);
  box-shadow: #89e219 0 0 0;
  transition: transform 0.05s, box-shadow 0.05s;
}

/* ---- Footer ---- */
.footer {
  background: #f5f5f5;
  padding: 32px 48px;
  text-align: center;
  border-top: 1px solid #eeeeee;
}

.footer p {
  font-size: 0.8rem;
  color: #999999;
  margin-bottom: 4px;
}

.footer p:last-child {
  margin-bottom: 0;
}

/* ---- Responsive: hamburger drawer below 960px ---- */
@media (max-width: 960px) {

  /* Layout: TOC is fixed/out-of-flow, page fills full width */
  .layout {
    flex-direction: column;
    gap: 0;
    max-width: 860px;
  }

  /* TOC becomes a fixed left drawer */
  .toc-sidebar {
    position: fixed;
    top: 0;
    left: 0;
    width: 280px;
    height: 100vh;
    height: 100dvh;
    border-radius: 0 16px 16px 0;
    border: 1.5px solid #e5e5e5;
    border-left: none;
    transform: translateX(-100%);
    transition: transform 0.28s cubic-bezier(0.4, 0, 0.2, 1);
    z-index: 100;
    overflow-y: auto;
    padding-top: 56px;
    box-shadow: 4px 0 24px rgba(0, 0, 0, 0.12);
    background: #ffffff;
  }

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

  /* Hamburger button */
  .toc-hamburger {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 5px;
    position: fixed;
    top: 14px;
    left: 14px;
    z-index: 101;
    width: 44px;
    height: 44px;
    background: #ffffff;
    border: 1.5px solid #e5e5e5;
    border-radius: 12px;
    cursor: pointer;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.10);
    padding: 0;
  }

  .toc-hamburger span {
    display: block;
    width: 18px;
    height: 2px;
    background: #3c3c3c;
    border-radius: 2px;
  }

  /* Close (×) button inside drawer */
  .toc-close {
    display: flex;
    align-items: center;
    justify-content: center;
    position: absolute;
    top: 12px;
    right: 12px;
    width: 32px;
    height: 32px;
    background: none;
    border: none;
    cursor: pointer;
    font-size: 1.6rem;
    color: #888888;
    border-radius: 8px;
    line-height: 1;
    transition: background-color 0.12s, color 0.12s;
  }

  .toc-close:hover { background: #f0f0f0; color: #333333; }

  .toc-item a { padding: 13px 18px; }

  /* Stack solution cards so 450px iframe never causes horizontal overflow */
  .solution-body {
    flex-direction: column;
  }

  .figma-col {
    width: 100%;
  }

  .figma-wrap iframe {
    width: 100%;
    height: 75vh;
    aspect-ratio: unset;
  }

  /* Tighten solution-card padding on tablet */
  .solution-card {
    padding: 20px 20px;
  }
}

/* ---- Responsive: small phones ---- */
@media (max-width: 640px) {
  .section,
  .section-band {
    padding: 28px 16px;
  }

  .header {
    padding: 32px 16px 28px;
  }

  .header h1 {
    font-size: 1.55rem;
  }

  .card-grid,
  .solution-sub {
    grid-template-columns: 1fr;
  }

  .solution-card {
    padding: 16px 12px;
    border-radius: 12px;
  }

  .sub-card {
    padding: 12px 14px;
  }

  .fab-container {
    bottom: 24px;
    width: calc(100% - 32px);
  }

  .duo-fab {
    width: 100%;
    padding: 16px 20px;
    font-size: 0.9rem;
  }

  .phase-item {
    flex-direction: column;
    gap: 10px;
  }

  .quote-block {
    flex-direction: column;
    gap: 8px;
  }

  /* solution-body already stacked from 960px block */
  .solution-body .solution-sub {
    grid-template-columns: 1fr;
  }

  .figma-wrap iframe {
    width: 100%;
    height: 65vh;
    aspect-ratio: unset;
  }

  .table-wrap {
    width: 100%;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
  }

  .about-row {
    flex-direction: column;
    gap: 16px;
  }

  .about-col-1,
  .about-col-2 {
    width: 100%;
  }

  .flow-steps {
    gap: 10px;
  }

  .footer {
    padding: 20px 16px;
  }
}