/* ==========================================================================
   RubyInsights theme for "Aprenda a Programar"
   Design tokens, chrome (header/footer), layout and typography adapted from the
   rubyinsights.blog Next.js app so the tutorial matches the RubyInsights brand.
   The tutorial engine's L2P* syntax classes are preserved (recolored below).
   ========================================================================== */

:root {
  --ruby-red: #D43A3A;
  --ruby-dark: #273646;
  --ruby-navy: #2B3C4A;
  --slate-navy: #1F2D3A;
  --mid-blue-gray: #415A6B;
  --light-bg: #E9EEF3;
  --white: #ffffff;
  --accent-yellow: #FFD66E;

  --border: #d7dee6;
  --card: #ffffff;
  --radius: 0.75rem;
  --radius-sm: 0.4rem;
  --shadow-sm: 0 1px 2px rgba(31, 45, 58, 0.06);
  --shadow-md: 0 10px 30px -12px rgba(31, 45, 58, 0.35);

  --font-sans: "Geist", system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --font-mono: "Geist Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
}

/* ------------------------------- reset ---------------------------------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  font-family: var(--font-sans);
  font-size: 17px;
  line-height: 1.7;
  color: var(--ruby-dark);
  background: var(--light-bg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

img { max-width: 100%; height: auto; }
a { color: var(--ruby-red); text-decoration: none; }
a:hover { color: var(--ruby-dark); text-decoration: underline; }

/* --------------------------- skip link ---------------------------------- */
.ri-skip { position: absolute; left: -9999px; top: auto; }
.ri-skip:focus {
  left: 1rem; top: 0.5rem; z-index: 60;
  background: #fff; color: var(--ruby-navy);
  padding: 0.5rem 0.75rem; border-radius: var(--radius-sm);
  box-shadow: var(--shadow-sm); font-weight: 600;
}

/* ----------------------------- header ----------------------------------- */
.ri-header {
  position: sticky; top: 0; z-index: 50;
  width: 100%;
  background: rgba(255, 255, 255, 0.85);
  -webkit-backdrop-filter: saturate(180%) blur(10px);
  backdrop-filter: saturate(180%) blur(10px);
  border-bottom: 1px solid var(--border);
}
.ri-header-inner {
  max-width: 1120px; margin: 0 auto; padding: 0 1.25rem;
  height: 64px; display: flex; align-items: center; justify-content: space-between; gap: 1rem;
}
.ri-logo { display: inline-flex; align-items: center; gap: 0.5rem; text-decoration: none; }
.ri-logo:hover { text-decoration: none; }
.ri-gem { width: 30px; height: 30px; color: var(--ruby-red); transition: transform 0.15s ease; }
.ri-logo:hover .ri-gem { transform: scale(1.1); }
.ri-logo-badge {
  background: var(--ruby-red); color: #fff; font-weight: 700; font-size: 1.15rem;
  line-height: 1; padding: 0.2rem 0.5rem; border-radius: var(--radius-sm); letter-spacing: -0.01em;
}
.ri-logo-word { color: var(--ruby-navy); font-weight: 700; font-size: 1.15rem; margin-left: 0.2rem; }

.ri-nav { display: flex; align-items: center; gap: 1.4rem; font-size: 0.95rem; font-weight: 500; }
.ri-nav a { color: rgba(43, 60, 74, 0.8); text-decoration: none; transition: color 0.15s ease; }
.ri-nav a:hover { color: var(--ruby-red); text-decoration: none; }
.ri-nav a.ri-nav-current { color: var(--ruby-red); }

/* language switcher */
.ri-lang { display: inline-flex; align-items: center; gap: 0.4rem; font-size: 0.85rem; font-weight: 600; }
.ri-lang a { color: rgba(43, 60, 74, 0.6); text-decoration: none; transition: color 0.15s ease; }
.ri-lang a:hover { color: var(--ruby-red); text-decoration: none; }
.ri-lang-current { color: var(--ruby-red); }
.ri-lang-sep { color: rgba(43, 60, 74, 0.3); }

/* "em tradução" / work-in-progress banner (shown on /en) */
.ri-wip {
  margin: 0 0 1.5rem; padding: 0.85rem 1.1rem;
  background: #fff7e6; border: 1px solid #ffd66e;
  border-left: 4px solid var(--ruby-red); border-radius: var(--radius-sm);
  color: var(--ruby-dark); font-size: 0.92rem; line-height: 1.5;
}
.ri-wip a { color: var(--ruby-red); font-weight: 600; }

/* ------------------------------ layout ---------------------------------- */
#pageWidth {
  flex: 1 0 auto;
  width: 100%; max-width: 1120px; min-width: 0;
  margin: 0 auto; padding: 1.5rem 1.25rem 3rem;
  display: grid; gap: 1.5rem; align-items: start;
  grid-template-columns: 240px minmax(0, 1fr);
  grid-template-areas: "hero hero" "menu content";
}

/* --------------------------- hero banner -------------------------------- */
#headerBar {
  grid-area: hero;
  position: relative; overflow: hidden;
  background: linear-gradient(135deg, var(--ruby-navy) 0%, var(--slate-navy) 100%);
  border-radius: var(--radius);
  padding: 2.25rem 1.5rem;
  text-align: center;
  box-shadow: var(--shadow-md);
}
#headerBar::before,
#headerBar::after {
  content: ""; position: absolute; width: 260px; height: 260px; border-radius: 50%;
  filter: blur(60px); z-index: 0; pointer-events: none;
}
#headerBar::before { background: rgba(212, 58, 58, 0.28); top: -120px; left: -80px; }
#headerBar::after { background: rgba(255, 214, 110, 0.16); bottom: -140px; right: -60px; }
#titlePicContainer { position: relative; z-index: 1; left: 0; width: auto; }
#titlePic { position: static; left: 0; top: 0; display: inline-block; max-width: min(100%, 440px); height: auto; }
#locket { display: none; }

/* ---------------------------- side menu --------------------------------- */
#menuPane {
  grid-area: menu;
  position: sticky; top: 84px; left: 0; width: auto;
  background: var(--card); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 1.25rem; box-shadow: var(--shadow-sm);
  font-family: var(--font-sans); font-size: 0.9rem; align-self: start;
}
#menuPane img, #menuSpearTop, #menuSpearBottom { display: none; }

#menuPane .funnyMenuText,
#menuPane .fancyMenuText {
  position: static; left: 0; text-align: left; margin: 0 0 0.5rem; padding: 0;
  letter-spacing: 0.06em; text-transform: uppercase; font-size: 0.72rem; font-weight: 700;
  color: var(--mid-blue-gray);
}
#menuPane ol {
  list-style: none; margin: 0.5rem 0 1rem; padding: 0;
  font-size: 0.92rem; font-family: var(--font-sans); line-height: 1.4;
}
#menuPane ol li { margin: 0; padding: 0; }
#menuPane ol li a {
  display: block; padding: 0.4rem 0.55rem; border-radius: var(--radius-sm);
  color: var(--ruby-navy); font-weight: 500; text-decoration: none; transition: background 0.12s ease, color 0.12s ease;
}
#menuPane ol li a:visited { color: var(--ruby-navy); }
#menuPane ol li a:hover { background: var(--light-bg); color: var(--ruby-red); text-decoration: none; }
#menuPane p {
  font-size: 0.78rem; font-family: var(--font-sans); line-height: 1.5;
  color: var(--mid-blue-gray); margin: 0.35rem 0; padding: 0;
}
#menuPane a { color: var(--ruby-red); }

/* --------------------------- content card ------------------------------- */
#contentPane {
  grid-area: content; position: static; left: 0; right: 0; top: 0; min-width: 0;
  background: var(--card); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 2rem 2.25rem; box-shadow: var(--shadow-sm);
}
#contentPane p { line-height: 1.75; padding: 0; margin: 0 0 1rem; clear: none; }
#contentPane ul, #contentPane ol { margin: 0 0 1rem 1.25rem; padding-left: 1rem; }
#contentPane li { margin: 0.3rem 0; }

/* --------------------------- typography --------------------------------- */
h1, h2, h3, h4 {
  font-family: var(--font-sans); color: var(--ruby-navy);
  letter-spacing: -0.015em; font-variant: normal; text-align: left;
}
h1 {
  font-size: 2rem; font-weight: 800; line-height: 1.2;
  margin: 0 0 1rem; padding-top: 0.5rem;
}
h2 {
  font-size: 1.4rem; font-weight: 700; line-height: 1.3;
  margin: 1.75rem 0 0.75rem; padding: 0;
}
h3 { font-size: 1.15rem; font-weight: 700; margin: 1.25rem 0 0.5rem; padding: 0; position: static; left: 0; }
h4 { font-size: 1rem; font-weight: 700; margin: 1rem 0 0.4rem; }

blockquote {
  border-left: 3px solid var(--ruby-red); background: var(--light-bg);
  padding: 0.75rem 1rem; margin: 1rem 0 1rem 0.25rem; font-style: italic;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0; font-size: 0.95rem;
}
blockquote em { font-style: normal; }
blockquote p { font-size: 0.95rem; }

kbd {
  font-family: var(--font-mono); font-size: 0.85em;
  background: var(--ruby-navy); color: #fff; padding: 0.1rem 0.35rem; border-radius: 0.3rem;
}
dfn { font-style: italic; font-weight: 600; color: var(--ruby-red); }
acronym, abbr { border-bottom: 1px dotted var(--mid-blue-gray); cursor: help; }

/* fleur divider (HLINE) -> subtle rule */
.fleur { clear: both; background: none; padding: 0; margin: 2rem 0; }
.fleur_stem {
  padding: 0; margin: 0; height: 0;
  border: 0; border-top: 1px solid var(--border);
}

/* ------------------------- code & output -------------------------------- */
/* Sample source cards (light, GitHub-like) with recolored syntax spans. */
pre {
  font-family: var(--font-mono); font-size: 0.88rem; line-height: 1.6;
  padding: 1rem 1.15rem; margin: 1.25rem 0; width: auto; max-width: 100%;
  border-radius: 0.6rem; overflow-x: auto; white-space: pre; tab-size: 2;
}
pre.L2PcodeBlock {
  background: #f6f8fa; color: #24292e; border: 1px solid var(--border);
}
/* Program output cards -> dark "console" look. */
pre.L2PoutputBlock {
  background: var(--slate-navy); color: #e6edf3; border: 1px solid var(--slate-navy);
}

/* Inline code / output chips inside prose. */
.L2Pcode {
  font-family: var(--font-mono); font-weight: 600; white-space: pre; font-size: 0.9em;
}
:not(pre) > .L2Pcode {
  background: var(--light-bg); border: 1px solid var(--border);
  border-radius: 0.3rem; padding: 0.03rem 0.35rem;
}
.L2PcodeBG { background: var(--light-bg); }
:not(pre) > .L2Pcode.L2PcodeBG {
  background: var(--slate-navy); color: #e6edf3; border-color: var(--slate-navy);
}

/* Typed-input highlight (echoed in output, and inline in prose). */
.L2Pinput {
  font-family: var(--font-mono); background: #fff; color: var(--ruby-dark);
  border: 1px solid var(--border); border-radius: 0.3rem;
  padding: 0 0.3rem; white-space: pre;
}

/* Syntax colors — matched to the blog's highlight.js palette (light bg). */
.L2Pkeyword    { color: #d73a49; font-weight: 600; }
.L2Pstring     { color: #22863a; }
.L2Pnumber     { color: #005cc5; }
.L2Pdefinition { color: #6f42c1; font-weight: 600; }
.L2Pcomment    { color: #6a737d; font-style: italic; }

/* ------------------------------ footer ---------------------------------- */
.ri-footer { margin-top: auto; background: var(--ruby-red); color: #fff; }
.ri-footer-inner {
  max-width: 1120px; margin: 0 auto; padding: 2.25rem 1.25rem;
  display: flex; flex-direction: column; gap: 1rem;
}
.ri-footer-copy { margin: 0; font-size: 0.9rem; color: rgba(255, 255, 255, 0.92); }
.ri-footer-copy a { color: #fff; text-decoration: underline; text-underline-offset: 3px; }
.ri-footer-nav { display: flex; flex-wrap: wrap; gap: 1.25rem; font-size: 0.9rem; }
.ri-footer-nav a { color: rgba(255, 255, 255, 0.92); text-decoration: none; }
.ri-footer-nav a:hover { color: #fff; text-decoration: underline; text-underline-offset: 3px; }

@media (min-width: 700px) {
  .ri-footer-inner { flex-direction: row; align-items: center; justify-content: space-between; }
}

/* ---------------------------- responsive -------------------------------- */
@media (max-width: 860px) {
  #pageWidth { grid-template-columns: 1fr; grid-template-areas: "hero" "menu" "content"; }
  #menuPane { position: static; top: auto; }
  #contentPane { padding: 1.5rem 1.35rem; }
}
@media (max-width: 640px) {
  body { font-size: 16px; }
  .ri-nav { display: none; }
  .ri-header-inner { padding: 0 1rem; }
  #pageWidth { padding: 1rem 1rem 2.5rem; }
  #headerBar { padding: 1.75rem 1rem; }
  h1 { font-size: 1.6rem; }
  h2 { font-size: 1.25rem; }
}