/* ============================================================
   Python v2 — style.css
   A faithful re-skin of the classic python.org homepage look:
   dark utility bar, steel-blue shell, light-blue nav, dark REPL
   panel with yellow accents — plus the parts python.org doesn't
   have (runnable playground, CPU-rendered game).
   ============================================================ */

:root {
  --shell: #2b5278;            /* the big blue field */
  --shell-deep: #24466a;
  --topbar: #1e2833;
  --topbar-cell: #2a3542;
  --nav: #3d6b96;
  --nav-hover: #4b8bbe;
  --panel: #25313d;            /* code panel */
  --panel-deep: #1d2731;
  --yellow: #ffd343;
  --yellow-deep: #e6b800;
  --blue-btn: #4b8bbe;
  --blue-ink: #2b5278;
  --blue-link: #2a6496;
  --ink: #25313d;
  --muted: #5c6b79;
  --line: #d5dde5;
  --paper: #ffffff;
  --paper-2: #f2f5f8;
  --code-str: #e3a86a;
  --code-key: #5fc4dc;
  --code-num: #86b8dd;
  --code-com: #8fa3ad;
  --code-txt: #e8eef2;
  --code-punct: #b9c6d0;
  --danger: #ff7b72;
  --ok: #f3f7fa;
  --font: "Open Sans", "Segoe UI", Verdana, Arial, sans-serif;
  --mono: Consolas, Menlo, "DejaVu Sans Mono", monospace;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font);
  color: var(--ink);
  background: var(--paper);
  line-height: 1.55;
  font-size: 15px;
}

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

code {
  font-family: var(--mono);
  font-size: 0.92em;
  background: rgba(43, 82, 120, 0.09);
  border-radius: 4px;
  padding: 0.05em 0.32em;
}

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

/* ============================== top utility bar ============================== */
.topbar {
  background: linear-gradient(180deg, #232d39 0%, var(--topbar) 100%);
  border-bottom: 1px solid #38434f;
}
.topbar-inner {
  display: flex; justify-content: center; align-items: stretch;
  max-width: 1400px; margin: 0 auto;
}
.topbar a {
  color: #b9c4cf;
  font-size: 15px;
  padding: 13px 34px;
  border-left: 1px solid #333e4a;
}
.topbar a:last-child { border-right: 1px solid #333e4a; }
.topbar a:hover { color: #fff; background: var(--topbar-cell); text-decoration: none; }
.topbar a.active {
  color: #fff;
  background: var(--topbar-cell);
  box-shadow: inset 0 2px 0 var(--yellow);
}

/* ============================== masthead ============================== */
.masthead { background: var(--shell); }
.masthead-inner {
  max-width: 1200px; margin: 0 auto;
  display: flex; align-items: center; justify-content: space-between;
  gap: 1.5rem; padding: 22px 24px 18px;
  flex-wrap: wrap;
}
.brand { display: flex; align-items: center; gap: 14px; }
.brand img { display: block; }
.brand-word {
  color: #fff;
  font-size: 42px;
  font-weight: 400;
  letter-spacing: 0.01em;
  line-height: 1;
}
.brand-word sup { font-size: 0.32em; font-weight: 600; margin-left: 0.15em; }
.brand-word em {
  font-style: normal;
  font-size: 0.36em;
  font-weight: 800;
  color: var(--yellow);
  letter-spacing: 0.08em;
  vertical-align: 0.75em;
  margin-left: 0.35em;
}

.masthead-tools { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; }

.btn-donate {
  background: var(--yellow);
  color: var(--topbar);
  font-weight: 700;
  font-size: 16px;
  padding: 11px 22px;
  border-radius: 8px;
  border: 0;
  cursor: pointer;
}
.btn-donate:hover { background: #ffdf70; text-decoration: none; }

.searchbox {
  display: flex; align-items: center;
  background: var(--topbar);
  border-radius: 10px;
  padding: 8px;
  gap: 8px;
}
.search-mag {
  width: 38px; height: 38px;
  display: flex; align-items: center; justify-content: center;
  color: var(--blue-btn);
  font-size: 22px;
  border-radius: 50%;
}
.searchbox input {
  border: 0; border-radius: 6px;
  background: #fff;
  padding: 10px 14px;
  width: 230px;
  font-size: 15px;
  font-family: var(--font);
}
.searchbox input:focus { outline: 2px solid var(--yellow); }
.btn-go {
  background: var(--blue-btn);
  color: #fff;
  font-weight: 700;
  border: 0;
  border-radius: 6px;
  padding: 10px 18px;
  cursor: pointer;
  font-size: 15px;
}
.btn-go:hover { background: #5c9ad0; }

.btn-social {
  background: var(--topbar);
  color: #fff;
  font-size: 15px;
  font-weight: 600;
  border: 1px solid #46525f;
  border-radius: 8px;
  padding: 12px 20px;
  cursor: pointer;
}
.btn-social:hover { background: var(--topbar-cell); }

/* ============================== main nav ============================== */
.mainnav { background: var(--shell); padding: 6px 18px 0; }
.mainnav-inner {
  max-width: 1200px; margin: 0 auto;
  background: linear-gradient(180deg, #4479a8 0%, var(--nav) 100%);
  border-radius: 8px 8px 0 0;
  display: flex; justify-content: center; flex-wrap: wrap;
}
.mainnav a {
  color: #fff;
  font-size: 16px;
  padding: 15px 28px;
}
.mainnav a:hover { background: rgba(255, 255, 255, 0.12); text-decoration: none; }

/* ============================== hero ============================== */
.hero {
  background: linear-gradient(180deg, var(--shell) 0%, var(--shell-deep) 100%);
  padding: 18px 24px 10px;
}
.hero-panel {
  max-width: 1180px; margin: 0 auto;
  display: grid;
  grid-template-columns: minmax(0, 1.32fr) minmax(0, 1fr);
  gap: 34px;
  align-items: stretch;
}

.hero-code {
  position: relative;
  background: var(--panel);
  border-radius: 10px;
  box-shadow: 0 18px 40px rgba(0, 0, 0, 0.32);
  display: flex; flex-direction: column;
  min-height: 335px;
}

.run-badge {
  position: absolute;
  top: 16px; right: 16px;
  width: 52px; height: 44px;
  background: var(--yellow);
  border: 0; border-radius: 10px;
  color: var(--topbar);
  font-family: var(--mono);
  font-size: 20px; font-weight: 700;
  cursor: pointer;
  z-index: 5;
  box-shadow: 0 6px 16px rgba(0, 0, 0, 0.3);
}
.run-badge:hover { background: #ffdf70; }

/* syntax-highlighted editor: highlight layer under a transparent textarea */
.editor {
  position: relative;
  flex: 1;
  margin: 26px 22px 0;
  min-height: 235px;
}
.editor pre,
.editor textarea {
  margin: 0;
  font-family: var(--mono);
  font-size: 15.5px;
  line-height: 1.72;
  tab-size: 4;
  white-space: pre-wrap;
  word-break: break-word;
}
.editor pre {
  position: absolute; inset: 0;
  pointer-events: none;
  color: var(--code-txt);
  overflow: hidden;
}
.editor textarea {
  position: relative;
  width: 100%; height: 100%;
  background: transparent;
  color: transparent;
  caret-color: var(--yellow);
  border: 0; resize: none;
  outline: none;
  overflow: hidden;
  padding: 0;
  display: block;
}
.editor:focus-within { outline: 2px solid rgba(255, 211, 67, 0.35); outline-offset: 6px; border-radius: 4px; }

.tok-com  { color: var(--code-com); }
.tok-str  { color: var(--code-str); }
.tok-key  { color: var(--code-key); }
.tok-num  { color: var(--code-num); }
.tok-pun  { color: var(--code-punct); }

.hero-out {
  margin: 14px 22px 22px;
  padding-top: 12px;
  border-top: 1px dashed rgba(255, 255, 255, 0.14);
  font-family: var(--mono);
  font-size: 15.5px;
  color: var(--ok);
  white-space: pre-wrap;
  min-height: 22px;
}
.hero-out.error { color: var(--danger); }

.hero-copy {
  display: flex; flex-direction: column;
  padding: 26px 4px 18px;
  color: #eaf1f8;
}
.hero-copy h2 {
  color: var(--yellow);
  font-size: 27px;
  margin: 4px 0 18px;
  letter-spacing: 0.01em;
}
.hero-copy p {
  font-size: 16.5px;
  margin: 0 0 22px;
  color: #f2f6fa;
}
.hero-copy code {
  background: rgba(13, 27, 42, 0.5);
  color: var(--code-txt);
  border: 1px solid rgba(255, 255, 255, 0.12);
}
.hero-link {
  color: #fff;
  text-decoration: underline;
  text-underline-offset: 4px;
}
.hero-link:hover { color: var(--yellow); }

.pager {
  display: flex; gap: 10px;
  justify-content: center;
  margin-top: auto;
  padding-top: 34px;
}
.pager button {
  width: 38px; height: 36px;
  border: 0;
  border-radius: 6px;
  background: var(--blue-btn);
  color: #fff;
  font-size: 15px;
  cursor: pointer;
}
.pager button:hover { background: #5c9ad0; }
.pager button[aria-selected="true"] {
  background: var(--yellow);
  color: var(--topbar);
  font-weight: 700;
}

.hero-tagline {
  max-width: 1180px;
  margin: 34px auto 30px;
  text-align: center;
  color: #e2e9f0;
  font-size: 24px;
  line-height: 1.45;
}
.hero-tagline a {
  color: #fff;
  font-weight: 700;
  text-decoration: underline;
  text-underline-offset: 4px;
  white-space: nowrap;
}
.hero-tagline a:hover { color: var(--yellow); }
.hero-tagline .prompt { color: var(--yellow); font-family: var(--mono); }

/* ============================== yellow band ============================== */
.band {
  background: var(--paper);
  padding: 0 24px;
}
.band-inner {
  max-width: 1180px; margin: 0 auto;
  position: relative;
  padding-bottom: 64px;
}
.band-yellow {
  background: var(--yellow);
  border-radius: 12px;
  padding: 34px 40px 46px;
  display: flex; align-items: center; justify-content: space-between;
  gap: 24px; flex-wrap: wrap;
}
.band-yellow h2 {
  margin: 0 0 6px;
  color: var(--topbar);
  font-size: 24px;
}
.band-yellow p { margin: 0; color: #4a3c12; font-size: 16px; max-width: 46rem; }
.band-card {
  position: absolute;
  left: 40px; right: 40px;
  bottom: 0;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 20px 30px;
  box-shadow: 0 16px 32px rgba(30, 40, 51, 0.12);
  display: flex; align-items: center; justify-content: space-between;
  gap: 18px; flex-wrap: wrap;
}
.band-card strong { color: var(--blue-ink); font-size: 17px; }
.band-card span { color: var(--muted); }

/* ============================== sections ============================== */
.section { padding: 58px 24px; }
.section-inner { max-width: 1180px; margin: 0 auto; }
.section h2 {
  color: var(--blue-ink);
  font-size: 30px;
  margin: 0 0 10px;
  letter-spacing: 0.01em;
}
.section h2 .prompt {
  color: var(--yellow-deep);
  font-family: var(--mono);
  margin-right: 8px;
}
.lede { font-size: 17px; color: var(--muted); max-width: 46rem; margin: 0 0 28px; }

/* feature / story cards */
.grid {
  display: grid; grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}
.card {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 24px 22px;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}
.card:hover {
  transform: translateY(-3px);
  box-shadow: 0 16px 30px rgba(30, 40, 51, 0.12);
}
.card-icon {
  width: 46px; height: 46px;
  display: flex; align-items: center; justify-content: center;
  background: var(--yellow);
  color: var(--topbar);
  font-size: 20px; font-weight: 800;
  border-radius: 9px;
  margin-bottom: 14px;
}
.card h3 { margin: 0 0 8px; font-size: 17.5px; color: var(--blue-ink); }
.card p { margin: 0; color: var(--muted); }

.features { background: var(--paper-2); }

/* ============================== game ============================== */
.game-section {
  background:
    radial-gradient(900px 400px at 12% 0%, rgba(75, 139, 190, 0.18), transparent 55%),
    var(--topbar);
}
.game-section h2 { color: var(--yellow); }
.game-section .lede { color: #b8c7d4; }
.game-section .lede code { background: rgba(255, 211, 67, 0.12); color: var(--yellow); }
.game-section a { color: var(--blue-btn); }

.game-wrap {
  display: grid; grid-template-columns: minmax(0, 1.6fr) minmax(0, 1fr);
  gap: 30px; align-items: start;
}
.game-frame {
  background: #000;
  border: 2px solid rgba(255, 211, 67, 0.35);
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 30px 70px rgba(0, 0, 0, 0.55);
}
#game-canvas {
  display: block; width: 100%; height: auto;
  image-rendering: pixelated; image-rendering: crisp-edges;
  cursor: crosshair; outline: none;
}
#game-canvas:focus-visible { box-shadow: inset 0 0 0 2px var(--yellow); }
.game-hud {
  display: flex; justify-content: space-between; gap: 1rem;
  background: rgba(13, 22, 32, 0.95);
  color: var(--blue-btn);
  font-family: var(--mono); font-size: 0.82rem;
  padding: 0.55rem 1rem;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}
.game-hud #hud-fps { color: var(--yellow); font-weight: 700; }

.game-side h3 { color: #fff; margin: 0.2rem 0 0.8rem; }
.game-side p { color: #b8c7d4; }
.game-side code { background: rgba(255, 211, 67, 0.12); color: var(--yellow); }
.key-list { list-style: none; padding: 0; margin: 0 0 1.1rem; color: #dce8f2; }
.key-list li { margin-bottom: 0.55rem; }
kbd {
  display: inline-block;
  background: #22384e;
  border: 1px solid rgba(255, 255, 255, 0.22);
  border-bottom-width: 3px;
  border-radius: 6px;
  padding: 0.1rem 0.55rem;
  margin-right: 0.3rem;
  font-family: var(--mono); font-size: 0.85rem;
  color: #fff;
}
.stat-row { display: flex; gap: 1rem; margin-top: 1.5rem; flex-wrap: wrap; }
.stat {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 10px;
  padding: 0.85rem 1.15rem;
  color: var(--blue-btn);
  display: flex; flex-direction: column;
}
.stat strong { color: var(--yellow); font-size: 1.55rem; line-height: 1.15; }
.stat span { font-size: 0.85rem; }

/* ============================== start / compare ============================== */
.start-grid {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: 22px; margin-bottom: 44px;
}
.start-box {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 12px; padding: 26px;
}
.start-box h3 { margin: 18px 0 10px; color: var(--blue-ink); font-size: 17px; }
.start-box h3:first-child { margin-top: 0; }

.terminal {
  background: var(--panel-deep);
  border-radius: 10px;
  padding: 16px 18px;
  overflow-x: auto;
  margin: 0;
}
.terminal code {
  background: transparent; padding: 0; border-radius: 0;
  color: #d7e3ee;
  font-family: var(--mono);
  font-size: 14px; line-height: 1.7;
  white-space: pre;
}

.compare-title { margin-top: 8px; }
.compare {
  width: 100%; border-collapse: collapse;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 10px;
  overflow: hidden;
}
.compare th {
  text-align: left; padding: 13px 20px;
  background: var(--blue-ink); color: #fff; font-size: 15.5px;
}
.compare th:last-child { background: var(--nav); }
.compare td {
  padding: 12px 20px;
  border-top: 1px solid var(--line);
  color: var(--muted);
}
.compare tr:hover td { background: rgba(75, 139, 190, 0.06); }
.compare td:last-child { color: var(--ink); font-weight: 600; }

.btn {
  display: inline-block;
  font-family: var(--font);
  font-weight: 700;
  font-size: 15px;
  border: 0;
  border-radius: 8px;
  padding: 11px 22px;
  cursor: pointer;
  transition: transform 0.12s ease, filter 0.12s ease;
  white-space: nowrap;
}
.btn:hover { transform: translateY(-1px); filter: brightness(1.05); text-decoration: none; }
.btn-blue { background: var(--blue-btn); color: #fff; }
.btn-inline { margin-top: 16px; }

/* ============================== docs teaser ============================== */
.docs-grid {
  display: grid; grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}
.doc-card {
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 18px 20px;
  background: var(--paper);
  transition: border-color 0.15s ease, transform 0.15s ease;
}
.doc-card:hover { border-color: var(--blue-btn); transform: translateY(-2px); }
.doc-card.hidden { display: none; }
.doc-card h3 { margin: 0 0 6px; font-size: 16px; color: var(--blue-ink); }
.doc-card p { margin: 0 0 10px; color: var(--muted); font-size: 14.5px; }
.snippet {
  display: inline-block;
  background: var(--panel);
  color: var(--yellow);
  font-family: var(--mono); font-size: 13px;
  padding: 6px 10px; border-radius: 6px;
}
.docs-foot { margin-top: 24px; color: var(--muted); }

/* ============================== news ============================== */
.news-section { background: var(--paper-2); }
.news-grid {
  display: grid; grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}
.news-card {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 10px; padding: 24px;
}
.news-date {
  color: var(--blue-link); font-size: 12.5px; font-weight: 700;
  letter-spacing: 0.09em; text-transform: uppercase;
}
.news-card h3 { margin: 8px 0 10px; color: var(--blue-ink); font-size: 18px; }
.news-card p { margin: 0 0 14px; color: var(--muted); }
.news-card a { font-weight: 700; }

/* ============================== community ============================== */
.community-section {
  background: linear-gradient(180deg, var(--shell) 0%, var(--shell-deep) 100%);
  color: #eaf1f8;
}
.community-section h2 { color: var(--yellow); }
.community-section .lede { color: #c9d6e2; }
.stat-row-big { justify-content: center; margin: 28px 0; }
.stat-row-big .stat { min-width: 150px; align-items: center; text-align: center; }
.community-cta { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }

/* ============================== footer ============================== */
.footer {
  background: var(--topbar);
  color: #9db0c0;
  padding: 46px 24px 24px;
}
.footer-inner {
  max-width: 1180px; margin: 0 auto;
  display: grid; grid-template-columns: repeat(5, 1fr);
  gap: 22px;
}
.footer-col h4 {
  color: var(--blue-btn); margin: 0 0 12px;
  font-size: 12.5px; letter-spacing: 0.12em; text-transform: uppercase;
}
.footer-col a { display: block; color: #9db0c0; padding: 3px 0; font-size: 14.5px; }
.footer-col a:hover { color: var(--yellow); }
.footer-legal {
  max-width: 1180px; margin: 34px auto 0;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: 18px;
  font-size: 13.5px;
}
.footer-legal img { vertical-align: -0.35em; margin-right: 6px; }
.footer-legal a { color: #9db0c0; }
.footer-meta { color: #6c8095; }

/* ============================== docs.html ============================== */
.page-head {
  background: linear-gradient(180deg, var(--shell) 0%, var(--shell-deep) 100%);
  padding: 34px 24px 30px;
}
.page-head-inner { max-width: 1180px; margin: 0 auto; }
.page-head h1 {
  color: var(--yellow);
  font-size: 34px;
  margin: 0 0 10px;
}
.page-head p { color: #e2e9f0; font-size: 17px; max-width: 48rem; margin: 0; }

.doc-section { padding: 46px 24px 10px; }
.doc-section-inner { max-width: 1180px; margin: 0 auto; }
.doc-section h2 {
  color: var(--blue-ink);
  font-size: 26px;
  margin: 26px 0 14px;
  padding-bottom: 10px;
  border-bottom: 3px solid var(--yellow);
  display: flex; align-items: center; gap: 10px;
}
.doc-section h2 .badge {
  background: var(--yellow);
  color: var(--topbar);
  font-size: 13px;
  border-radius: 6px;
  padding: 3px 10px;
  letter-spacing: 0.04em;
}
.doc-section h3 {
  color: var(--blue-ink);
  font-size: 18px;
  margin: 24px 0 10px;
}
.doc-section p { color: var(--muted); max-width: 52rem; }
.doc-section ol, .doc-section ul { color: var(--muted); max-width: 52rem; }
.doc-section li { margin-bottom: 8px; }

.steps {
  background: var(--paper-2);
  border: 1px solid var(--line);
  border-left: 5px solid var(--yellow);
  border-radius: 10px;
  padding: 18px 22px;
  margin: 16px 0;
  max-width: 52rem;
}
.steps strong { color: var(--blue-ink); }

.checklist {
  list-style: none; padding: 0; max-width: 52rem;
}
.checklist li {
  padding-left: 30px;
  position: relative;
  margin-bottom: 10px;
}
.checklist li::before {
  content: "✓";
  position: absolute; left: 0;
  color: var(--yellow-deep);
  font-weight: 800;
}

table.ref-table {
  width: 100%; border-collapse: collapse;
  border: 1px solid var(--line);
  border-radius: 10px; overflow: hidden;
  margin: 14px 0 26px;
}
.ref-table th {
  text-align: left;
  background: var(--blue-ink); color: #fff;
  padding: 11px 16px; font-size: 14.5px;
}
.ref-table td {
  padding: 10px 16px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  vertical-align: top;
}
.ref-table tr:hover td { background: rgba(75, 139, 190, 0.06); }
.ref-table td:first-child { white-space: nowrap; }

.try-grid {
  display: grid; grid-template-columns: 1.2fr 1fr;
  gap: 22px; margin: 22px 0 10px;
}
.try-editor { display: flex; flex-direction: column; }
.try-editor textarea {
  width: 100%; min-height: 190px;
  background: var(--panel-deep);
  color: var(--code-txt);
  border: 0; border-radius: 10px;
  padding: 16px 18px;
  font-family: var(--mono); font-size: 14px; line-height: 1.65;
  resize: vertical;
}
.try-out {
  background: var(--panel-deep);
  border-radius: 10px;
  padding: 16px 18px;
  font-family: var(--mono); font-size: 14px;
  color: var(--ok);
  white-space: pre-wrap;
  min-height: 190px;
}
.try-out.error { color: var(--danger); }

/* ============================== responsive ============================== */
@media (max-width: 1000px) {
  .hero-panel, .game-wrap, .start-grid, .try-grid { grid-template-columns: 1fr; }
  .grid, .docs-grid, .news-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-inner { grid-template-columns: repeat(3, 1fr); }
  .band-card { position: static; margin-top: -28px; }
}
@media (max-width: 640px) {
  .grid, .docs-grid, .news-grid { grid-template-columns: 1fr; }
  .footer-inner { grid-template-columns: repeat(2, 1fr); }
  .topbar a { padding: 10px 16px; font-size: 13.5px; }
  .mainnav a { padding: 12px 16px; font-size: 14px; }
  .brand-word { font-size: 32px; }
  .searchbox input { width: 150px; }
  .hero-copy h2 { font-size: 23px; }
  .hero-tagline { font-size: 19px; }
}