/* Shared styles for the 100 Days of Python site. Vanilla CSS, no frameworks. */
:root {
  --bg: #f6f7fb;
  --card: #ffffff;
  --ink: #1c2333;
  --muted: #5b6478;
  --accent: #2563eb;
  --accent-dark: #1d4ed8;
  --green: #16a34a;
  --amber: #d97706;
  --purple: #7c3aed;
  --border: #e3e7f0;
  /* Code theme: shared by the code viewer and the markdown preview. */
  --code-bg: #0f172a;
  --code-ink: #e2e8f0;
  --code-muted: #94a3b8;
  --code-accent: #93c5fd;
  --code-border: #334155;
  --code-raised: #1e293b;
  --code-deep: #0b0f1a;
  --radius: 12px;
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--ink);
  line-height: 1.5;
}

.wrap { max-width: 1080px; margin: 0 auto; padding: 0 20px; }

header.site {
  background: linear-gradient(135deg, #1e293b, #0f172a);
  color: #fff;
  padding: 44px 0 36px;
  margin-bottom: 28px;
}
header.site h1 { margin: 0 0 8px; font-size: 2rem; letter-spacing: -0.02em; }
header.site p { margin: 0; color: #c3cede; max-width: 640px; }
header.site a { color: #93c5fd; }

.toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
  margin-bottom: 20px;
}
.toolbar input[type="search"] {
  flex: 1 1 240px;
  padding: 10px 14px;
  font-size: 1rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--card);
}
.filters { display: flex; gap: 8px; flex-wrap: wrap; }
.filters button {
  border: 1px solid var(--border);
  background: var(--card);
  color: var(--ink);
  padding: 8px 14px;
  border-radius: 999px;
  cursor: pointer;
  font-size: 0.9rem;
}
.filters button.active { background: var(--ink); color: #fff; border-color: var(--ink); }

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 16px;
  padding-bottom: 60px;
}
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  transition: transform 0.12s ease, box-shadow 0.12s ease;
}
.card:hover { transform: translateY(-2px); box-shadow: 0 8px 24px rgba(15, 23, 42, 0.08); }
.card h3 { margin: 0; font-size: 1.05rem; }
.card .meta { color: var(--muted); font-size: 0.85rem; }
.badge {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: 3px 10px;
  border-radius: 999px;
  width: fit-content;
}
.badge.console { background: #dcfce7; color: #166534; }
.badge.turtle { background: #fef3c7; color: #92400e; }
.badge.tkinter { background: #ede9fe; color: #5b21b6; }
.card a.run-btn, .btn {
  display: inline-block;
  text-align: center;
  background: var(--accent);
  color: #fff;
  text-decoration: none;
  padding: 10px 16px;
  border-radius: 8px;
  font-weight: 600;
  border: none;
  cursor: pointer;
  font-size: 0.95rem;
  margin-top: auto;
}
.card a.run-btn:hover, .btn:hover { background: var(--accent-dark); }
.btn.secondary { background: #e2e8f0; color: var(--ink); }
.btn.secondary:hover { background: #cbd5e1; }
.btn:disabled { opacity: 0.55; cursor: wait; }

.back-link { display: inline-block; margin: 18px 0; color: var(--accent); text-decoration: none; font-weight: 600; }
.back-link:hover { text-decoration: underline; }

.panel {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  margin-bottom: 20px;
}
.panel h2 { margin-top: 0; font-size: 1.2rem; }

.code-view {
  background: var(--code-bg);
  color: var(--code-ink);
  border-radius: var(--radius);
  padding: 16px;
  overflow: auto;
  max-height: 420px;
  font-family: var(--mono);
  font-size: 0.85rem;
  white-space: pre;
}
/* Markdown preview: same code theme variables as .code-view, no colors of its own. */
.md-view {
  background: var(--code-bg);
  color: var(--code-ink);
  border-radius: var(--radius);
  padding: 4px 20px 16px;
  overflow: auto;
  max-height: 420px;
  line-height: 1.6;
  overflow-wrap: anywhere;
}
.md-view h1, .md-view h2, .md-view h3, .md-view h4 { margin: 1.1em 0 0.4em; line-height: 1.25; }
.md-view h1 { font-size: 1.4rem; }
.md-view h2 { font-size: 1.2rem; }
.md-view h3 { font-size: 1.05rem; }
.md-view p, .md-view ul, .md-view ol { margin: 0.6em 0; }
.md-view img { max-width: 100%; height: auto; }
.md-view a { color: var(--code-accent); }
.md-view blockquote { margin: 0.8em 0; padding: 2px 14px; border-left: 4px solid var(--code-border); color: var(--code-muted); }
.md-view code { font-family: var(--mono); font-size: 0.85em; background: var(--code-raised); padding: 1px 5px; border-radius: 4px; }
.md-view pre { background: var(--code-deep); padding: 12px 14px; border-radius: 8px; overflow: auto; }
.md-view pre code { background: none; padding: 0; }
.md-view hr { border: 0; border-top: 1px solid var(--code-border); }
.md-view .status { color: var(--code-muted); }
.terminal {
  background: #0b0f1a;
  color: #d1fae5;
  border-radius: var(--radius);
  padding: 16px;
  font-family: var(--mono);
  font-size: 0.9rem;
  min-height: 180px;
  max-height: 420px;
  overflow-y: auto;
  white-space: pre-wrap;
  word-break: break-word;
}
.terminal .err { color: #fca5a5; }

/* Live input line: a bare input styled to disappear into the terminal text. */
.term-input-line { display: flex; align-items: baseline; gap: 6px; }
/* display:flex would otherwise beat the UA stylesheet's [hidden] rule. */
.term-input-line[hidden] { display: none; }
.term-caret { color: #34d399; flex: none; }
.term-input {
  flex: 1 1 auto;
  min-width: 0;
  background: transparent;
  border: 0;
  outline: none;
  padding: 0;
  color: inherit;
  font: inherit;
  caret-color: #34d399;
}

.file-tabs { display: flex; gap: 6px; flex-wrap: wrap; margin-bottom: 10px; }
.file-tabs button {
  font-family: var(--mono);
  font-size: 0.8rem;
  border: 1px solid var(--border);
  background: #eef1f7;
  padding: 6px 12px;
  border-radius: 6px;
  cursor: pointer;
}
.file-tabs button.active { background: var(--ink); color: #fff; }

#turtle-stage { text-align: center; }
/* The drawing area is the same colour as the card, so mark its edges: without a
   border you cannot tell where the canvas ends and a turtle has gone off-screen. */
#turtle-canvas {
  display: inline-block;
  border: 2px solid var(--border);
  border-radius: var(--radius);
  background: #fff;
  overflow: hidden;
  max-width: 100%;
}
#turtle-canvas:empty { display: none; }
#turtle-stage canvas, #turtle-stage > div { margin: 0 auto; }
#turtle-canvas canvas { display: block; max-width: 100%; }

.status { color: var(--muted); font-size: 0.9rem; margin: 10px 0; }

.app-form { display: grid; gap: 12px; max-width: 520px; }
.app-form label { font-weight: 600; font-size: 0.9rem; }
.app-form input[type="text"], .app-form input[type="number"], .app-form select, .app-form textarea {
  padding: 10px 12px;
  font-size: 1rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  width: 100%;
}
.result-box {
  background: #f1f5f9;
  border: 1px dashed var(--border);
  border-radius: 8px;
  padding: 16px;
  font-size: 1.1rem;
  margin-top: 8px;
}
.flashcard {
  width: 100%;
  max-width: 560px;
  aspect-ratio: 8 / 5;
  margin: 0 auto 16px;
  perspective: 1000px;
  cursor: pointer;
}
.flashcard-inner {
  position: relative;
  width: 100%;
  height: 100%;
  transition: transform 0.5s;
  transform-style: preserve-3d;
}
.flashcard.flipped .flashcard-inner { transform: rotateY(180deg); }
.flashcard-face {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border-radius: 16px;
  backface-visibility: hidden;
  box-shadow: 0 10px 30px rgba(15, 23, 42, 0.12);
}
.flashcard-front { background: #fff; }
.flashcard-back { background: #1e3a5f; color: #fff; transform: rotateY(180deg); }
.flashcard-face .lang { font-size: 0.85rem; text-transform: uppercase; letter-spacing: 0.15em; opacity: 0.6; }
.flashcard-face .word { font-size: 2.2rem; font-weight: 700; }
.quiz-card {
  background: #fff;
  /* The quizzler page sets color:#fff on body; without this the question text
     is white on a white card and the card looks blank. */
  color: var(--ink);
  border-radius: 12px;
  padding: 32px 24px;
  text-align: center;
  font-size: 1.25rem;
  min-height: 180px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--border);
  transition: background 0.2s, color 0.2s;
}
/* Answer feedback paints the card green/red - switch to white text to stay legible. */
.quiz-card.answered { color: #fff; }
/* Code panel appended to the web-app pages. Needs its own card look because some
   of those pages restyle .panel (quizzler makes panels transparent on a dark bg). */
.code-panel {
  background: var(--card) !important;
  border: 1px solid var(--border) !important;
  color: var(--ink);
  max-width: 900px;
  margin: 24px auto 0;
  text-align: left;
}
.code-panel h2, .code-panel .status { color: var(--ink); }
.code-panel .status { color: var(--muted); }
.quote-box {
  background: #fff;
  border-left: 5px solid var(--accent);
  border-radius: 0 12px 12px 0;
  padding: 28px;
  font-size: 1.4rem;
  font-style: italic;
  margin: 16px 0;
  box-shadow: 0 4px 14px rgba(15, 23, 42, 0.06);
}
.timer-display {
  font-family: var(--mono);
  font-size: 4rem;
  font-weight: 700;
  text-align: center;
  margin: 12px 0;
}
.checkmarks { text-align: center; font-size: 1.4rem; color: var(--green); min-height: 2rem; }
.log-box {
  background: #0f172a;
  color: #e2e8f0;
  border-radius: 8px;
  padding: 12px;
  font-family: var(--mono);
  font-size: 0.85rem;
  min-height: 90px;
  max-height: 220px;
  overflow-y: auto;
  white-space: pre-wrap;
}
.row { display: flex; gap: 10px; flex-wrap: wrap; align-items: center; }
footer.site { text-align: center; color: var(--muted); padding: 30px 0 50px; font-size: 0.9rem; }
footer.site a { color: var(--accent); }

@media (max-width: 640px) {
  header.site h1 { font-size: 1.5rem; }
  .timer-display { font-size: 3rem; }
  .flashcard-face .word { font-size: 1.6rem; }
}
.hint { color: var(--muted); font-size: 0.9rem; margin: 8px 0; text-align: center; }