/* Self-hosted Google Fonts (Variable Fonts, latin subset) */
@font-face {
  font-family: 'DM Sans';
  font-style: normal;
  font-weight: 300 600;
  font-display: swap;
  src: url(fonts/dm-sans.woff2) format('woff2');
}
@font-face {
  font-family: 'DM Sans';
  font-style: italic;
  font-weight: 300 400;
  font-display: swap;
  src: url(fonts/dm-sans-italic.woff2) format('woff2');
}
@font-face {
  font-family: 'JetBrains Mono';
  font-style: normal;
  font-weight: 300 500;
  font-display: swap;
  src: url(fonts/jetbrains-mono.woff2) format('woff2');
}
@font-face {
  font-family: 'Lora';
  font-style: normal;
  font-weight: 400 600;
  font-display: swap;
  src: url(fonts/lora.woff2) format('woff2');
}
@font-face {
  font-family: 'Lora';
  font-style: italic;
  font-weight: 400 600;
  font-display: swap;
  src: url(fonts/lora-italic.woff2) format('woff2');
}

:root {
  --font-display: 'Lora', Georgia, serif;
  --bg: #f5f2ed;
  --fg: #1a1a1a;
  --fg-muted: #666;
  --calendar-line: rgba(26,26,26,0.18);
  --calendar-text: rgba(26,26,26,0.45);
  --calendar-deadline: #1a1a1a;
  --calendar-secondary: rgba(26,26,26,0.35);
  --accent: #c0392b;
  --accent-bg: rgba(192,57,43,0.12);
  --accent-border: rgba(192,57,43,0.5);
  --accent-glow: none;
  --secondary-bg: rgba(26,26,26,0.06);
  --secondary-border: rgba(26,26,26,0.22);
  --marker-color: rgba(26,26,26,0.32);
  --line: rgba(26,26,26,0.12);
  --transition-speed: 1.6s;
}

.dark-mode {
  --bg: #111;
  --fg: #e8e4de;
  --fg-muted: #999;
  --calendar-line: rgba(255,255,255,0.18);
  --calendar-text: rgba(255,255,255,0.5);
  --calendar-deadline: #ddd;
  --calendar-secondary: rgba(255,255,255,0.35);
  --accent: #e74c3c;
  --accent-bg: rgba(231,76,60,0.2);
  --accent-border: rgba(231,76,60,0.55);
  --accent-glow: 0 0 10px rgba(231,76,60,0.25);
  --secondary-bg: rgba(255,255,255,0.07);
  --secondary-border: rgba(255,255,255,0.2);
  --marker-color: rgba(255,255,255,0.45);
  --line: rgba(255,255,255,0.1);
}

.warm-mode {
  --bg: #f0ece4;
  --fg: #1a1a1a;
  --fg-muted: #706d66;
  --calendar-line: rgba(26,26,26,0.15);
  --calendar-text: rgba(26,26,26,0.4);
  --calendar-deadline: #1a1a1a;
  --calendar-secondary: rgba(26,26,26,0.3);
  --accent: #c0392b;
  --accent-bg: rgba(192,57,43,0.1);
  --accent-border: rgba(192,57,43,0.4);
  --accent-glow: none;
  --secondary-bg: rgba(26,26,26,0.05);
  --secondary-border: rgba(26,26,26,0.18);
  --marker-color: rgba(26,26,26,0.28);
  --line: rgba(26,26,26,0.1);
}

.warm-dark-mode {
  --bg: #1a1510;
  --fg: #e8e2d8;
  --fg-muted: #9a8f80;
  --calendar-line: rgba(232,226,216,0.15);
  --calendar-text: rgba(232,226,216,0.45);
  --calendar-deadline: #d8ccbc;
  --calendar-secondary: rgba(232,226,216,0.3);
  --accent: #d4502a;
  --accent-bg: rgba(212,80,42,0.18);
  --accent-border: rgba(212,80,42,0.5);
  --accent-glow: 0 0 10px rgba(212,80,42,0.2);
  --secondary-bg: rgba(255,255,255,0.06);
  --secondary-border: rgba(255,255,255,0.15);
  --marker-color: rgba(232,226,216,0.38);
  --line: rgba(232,226,216,0.1);
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { font-size: 19px; }

body {
  font-family: 'DM Sans', sans-serif;
  background: var(--bg);
  color: var(--fg);
  transition: background var(--transition-speed) ease, color var(--transition-speed) ease;
  overflow-x: hidden;
}

/* ═══ SITE TOPBAR ═══ */
.site-topbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 9999;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 1.5rem;
  height: 42px;
  background: #3D3C3B;
  color: #fff;
  font-size: 0.74rem;
  font-family: 'DM Sans', sans-serif;
}
.topbar-left {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  min-width: 0;
}
.topbar-logo {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  text-decoration: none;
  color: #fff;
  transition: opacity 0.2s;
}
.topbar-logo:hover { opacity: 0.8; }
.topbar-logo-svg {
  width: 22px;
  height: 22px;
  flex-shrink: 0;
}
.topbar-uni-name {
  white-space: nowrap;
  font-weight: 400;
}
.topbar-separator {
  opacity: 0.4;
  font-weight: 300;
}
.topbar-faculty {
  opacity: 0.7;
  white-space: nowrap;
  color: #fff;
  text-decoration: none;
  transition: opacity 0.2s;
}
.topbar-faculty:hover { opacity: 1; }
.topbar-menu-btn {
  background: none;
  border: none;
  color: #fff;
  cursor: pointer;
  padding: 0.3rem;
  display: flex;
  align-items: center;
  transition: opacity 0.2s;
}
.topbar-menu-btn:hover { opacity: 0.7; }
.topbar-hamburger {
  width: 20px;
  height: 20px;
}
.topbar-dropdown {
  display: none;
  position: absolute;
  top: 100%;
  right: 1rem;
  background: #3D3C3B;
  border-radius: 0 0 4px 4px;
  padding: 0.4rem 0;
  min-width: 160px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.3);
}
.topbar-dropdown.is-open { display: block; }
.topbar-dropdown a {
  display: block;
  padding: 0.5rem 1.2rem;
  color: #fff;
  text-decoration: none;
  font-size: 0.74rem;
  transition: background 0.15s;
}
.topbar-dropdown a:hover { background: rgba(255,255,255,0.1); }

body { padding-top: 42px; }

/* ═══ HERO ═══ */
.hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  padding: 2rem;
  position: relative;
  background: var(--bg);
  transition: background var(--transition-speed) ease;
}

.hero-label {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.78rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 1.5rem;
  transition: color var(--transition-speed) ease;
}

.hero h1 {
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  line-height: 1.15;
  margin-bottom: 1rem;
  max-width: 820px;
}

.hero h1 em {
  font-style: italic;
  font-size: 0.88em;
  color: var(--accent);
  transition: color var(--transition-speed) ease;
}

.hero .subtitle {
  font-size: 1.1rem;
  color: var(--fg-muted);
  font-weight: 300;
  max-width: 35em;
  line-height: 1.7;
  transition: color var(--transition-speed) ease;
}

.hero .reading-time {
  margin-top: 3rem;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.8rem;
  color: var(--fg-muted);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  transition: color var(--transition-speed) ease;
}

.hero .scroll-hint {
  position: absolute;
  bottom: 2.5rem;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.7rem;
  color: var(--fg-muted);
  opacity: 0.4;
  letter-spacing: 0.1em;
  animation: scrollBounce 2s ease-in-out infinite;
}
@keyframes scrollBounce {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(6px); }
}

.reader-link {
  margin-top: 1rem;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.72rem;
  color: var(--fg-muted);
  opacity: 0.35;
  text-decoration: none;
  letter-spacing: 0.08em;
  transition: opacity 0.2s;
}
.reader-link:hover { opacity: 0.8; }

/* ═══ SCROLLYTELLING GRID ═══ */
.scrollytelling {
  display: grid;
  grid-template-columns: 1fr 340px;
  gap: 2.5rem;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
  align-items: start;
}

.scrollytelling.calendar-hidden {
  grid-template-columns: 1fr 0px;
  gap: 0;
  transition: grid-template-columns 0.4s ease, gap 0.4s ease;
}
.scrollytelling.calendar-hidden .calendar-column {
  opacity: 0;
  overflow: hidden;
  pointer-events: none;
}
.scrollytelling.calendar-gone {
  grid-template-columns: 1fr;
}
.scrollytelling.calendar-gone .calendar-column {
  display: none;
}

/* ─── Story sections & steps ─── */
.story-section.is-locked { display: none; }

.story-step {
  padding: 4vh 0;
  min-height: 50vh;
  display: flex;
  align-items: center;
}
.story-step .inner {
  max-width: 800px;
  width: 100%;
  margin: 0 auto;
  padding: 1rem 2rem;
}
.story-step .inner.inner--wide {
  max-width: none;
}
.inner--wide > p,
.inner--wide > .voice,
.inner--wide > .thought {
  max-width: 800px;
}

/* ─── Section intros (formerly pre-section) ─── */
.section-intro {
  padding: 15vh 0 5vh;
  display: flex;
  align-items: center;
  justify-content: center;
}
.section-intro .inner { max-width: 800px; padding: 1rem 2rem; }
.section-intro--wide .inner { max-width: 1200px; }

/* ─── Click gates ─── */
.click-gate {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 40vh;
  padding: 4rem 2rem;
  position: relative;
}
.click-gate::before {
  content: '';
  position: absolute;
  top: 0; left: 2rem; right: 2rem;
  height: 1px;
  background: var(--line);
  transition: background var(--transition-speed) ease;
}
.gate-inner {
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.5rem;
}
.gate-label {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.72rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--fg-muted);
  opacity: 0.6;
  transition: color var(--transition-speed) ease;
}
.gate-hook {
  font-family: var(--font-display);
  font-style: italic;
  font-size: 1.05rem;
  color: var(--fg-muted);
  opacity: 0.7;
  transition: color var(--transition-speed) ease;
}
.gate-btn {
  font-family: 'DM Sans', sans-serif;
  font-size: 1rem;
  font-weight: 400;
  padding: 14px 48px;
  border: 1px solid var(--line);
  border-radius: 4px;
  background: var(--bg);
  color: var(--fg);
  cursor: pointer;
  letter-spacing: 0.04em;
  transition: background 0.2s ease, color 0.2s ease, border-color 0.2s ease, transform 0.15s ease;
}
.gate-btn:hover {
  background: var(--fg);
  color: var(--bg);
  border-color: var(--fg);
  transform: translateY(-1px);
}
.gate-btn:active {
  transform: translateY(0);
}

/* Special gate: Ergebnis reveal */
.gate-btn--reveal {
  font-size: 1.1rem;
  padding: 16px 56px;
  border-color: var(--accent);
  color: var(--accent);
}
.gate-btn--reveal:hover {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}

/* ═══ TYPOGRAPHY ═══ */
.story-step h2,
.section-intro h2 {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(1.6rem, 3.5vw, 2.4rem);
  margin-bottom: 1rem;
  line-height: 1.35;
  transition: color var(--transition-speed) ease;
}

.story-step p,
.section-intro p,
.outro p {
  font-size: 1.05rem;
  line-height: 1.8;
  color: var(--fg-muted);
  font-weight: 300;
  transition: color var(--transition-speed) ease;
  margin-bottom: 1rem;
  hyphens: auto;
  -webkit-hyphens: auto;
}

.story-step p:last-child,
.section-intro p:last-child { margin-bottom: 0; }

.story-step code {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.88em;
  font-variant-ligatures: none;
  background: var(--secondary-bg);
  padding: 1px 5px;
  border-radius: 3px;
  transition: background var(--transition-speed) ease;
}

.week-label {
  font-family: 'JetBrains Mono', monospace;
  font-size: 16px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 0.75rem;
  transition: color var(--transition-speed) ease;
}

.bignum {
  font-family: 'JetBrains Mono', monospace;
  font-size: clamp(3rem, 8vw, 5rem);
  font-weight: 500;
  color: var(--accent);
  line-height: 1;
  margin-bottom: 0.5rem;
  transition: color var(--transition-speed) ease;
}

.bignum-label {
  font-size: 0.88rem;
  color: var(--fg-muted);
  font-weight: 400;
  margin-bottom: 1.5rem;
  transition: color var(--transition-speed) ease;
}

/* ─── Voice blocks ─── */
.voice {
  margin: 0.5rem 0;
  padding: 1rem 1.2rem;
  border-radius: 4px;
  font-size: 0.95rem;
  line-height: 1.7;
  color: var(--fg-muted);
  transition: background var(--transition-speed) ease, border-color var(--transition-speed) ease, color var(--transition-speed) ease;
}

.voice-who {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.6rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-weight: 500;
  margin-bottom: 0.3rem;
  display: none;
}

.voice--alex {
  background: none;
  border-left: 2px solid var(--line);
  font-style: italic;
  font-family: var(--font-display);
  font-size: 1.63rem;
  margin: 42px 0 56px 0;
}
.voice--alex .voice-who { color: var(--fg-muted); }

.voice--scene {
  background: var(--secondary-bg);
  border-left: 3px solid var(--line);
  font-style: italic;
}

/* ─── Thought blocks ─── */
.thought {
  font-family: var(--font-display);
  font-style: italic;
  color: var(--fg-muted);
  padding-left: 1.2rem;
  border-left: 2px solid var(--line);
  margin: 24px 0 44px 0;
  font-size: 1.63rem;
  line-height: 1.7;
  hyphens: auto;
  -webkit-hyphens: auto;
  transition: color var(--transition-speed) ease, border-color var(--transition-speed) ease;
}

/* ─── Section intro ─── */
.s__intro {
  font-size: 0.95rem;
  color: var(--fg-muted);
  margin-bottom: 1rem;
  font-style: italic;
}

/* ─── Inline code block ─── */
.code-block {
  background: var(--secondary-bg);
  padding: 0.8rem 1rem;
  border-radius: 4px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.8rem;
  font-variant-ligatures: none;
  margin: 1rem 0;
  overflow-x: auto;
  transition: background var(--transition-speed) ease;
}

/* ─── Separator ─── */
.sep {
  text-align: center;
  padding: 0.5rem 0;
  color: var(--fg-muted);
  opacity: 0.25;
  font-size: 1.2rem;
  letter-spacing: 0.5em;
}

/* ─── Spacing utilities ─── */
.mb-gap { margin-bottom: 2.5rem; }
.mt-gap { margin-top: 4rem; }

/* ─── Schedule grid ─── */
.sched-wrap { overflow-x: auto; -webkit-overflow-scrolling: touch; margin: 0 0 2rem 0; }
.sched {
  display: grid;
  grid-template-columns: 50px repeat(5, minmax(0, 1fr));
  gap: 1px;
  font-size: 0.85rem;
  min-width: 580px;
  background: var(--calendar-line);
  border-radius: 4px;
  overflow: hidden;
  transition: background var(--transition-speed) ease;
}
.sched--7d {
  grid-template-columns: 50px repeat(7, minmax(0, 1fr));
  min-width: 750px;
}
.sched > * {
  background: var(--bg);
  transition: background var(--transition-speed) ease;
}
.sched__day {
  text-align: center;
  font-family: 'JetBrains Mono', monospace;
  font-weight: 500;
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  padding: 8px 0;
  color: var(--fg-muted);
}
.sched__time {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.65rem;
  text-align: right;
  padding-right: 8px;
  padding-top: 6px;
  color: var(--fg-muted);
  opacity: 0.5;
}
.sched__cell-2h { height: 100px; }
.sched__cell-4h { height: 200px; }
.sched__cell-eve { height: 80px; }
.sched__b {
  padding: 8px 10px;
  font-size: 0.78rem;
  line-height: 1.35;
  height: 100%;
  display: flex;
  flex-direction: column;
  justify-content: center;
  overflow: hidden;
  background: var(--secondary-bg);
  transition: background var(--transition-speed) ease;
}
.sched__b strong { font-weight: 600; font-size: 0.76rem; }
.sched__b small { opacity: 0.7; font-size: 0.62rem; display: block; margin-top: 2px; }
.sched__b--own { border: 1px dashed var(--line); background: transparent; }

/* ─── Workload bars ─── */
.wlbar { margin: 1.5rem 0 2.5rem 0; }
.wlbar__label {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.85rem;
  color: var(--fg-muted);
  margin-bottom: 0.4rem;
  display: flex;
  justify-content: space-between;
  transition: color var(--transition-speed) ease;
}
.wlbar__track {
  height: 36px;
  background: var(--secondary-bg);
  border-radius: 4px;
  overflow: hidden;
  display: flex;
  gap: 1px;
  transition: background var(--transition-speed) ease;
}
.wlbar__seg {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.7rem;
  border-radius: 3px;
  color: var(--fg-muted);
  transition: color var(--transition-speed) ease;
}

/* ─── Exam box ─── */
.exam-box {
  border: 1px solid var(--line);
  border-radius: 6px;
  overflow: hidden;
  margin: 1.5rem 0;
  transition: border-color var(--transition-speed) ease;
}
.exam-box__hd {
  font-family: 'JetBrains Mono', monospace;
  padding: 0.55rem 1rem;
  font-size: 0.62rem;
  font-weight: 500;
  border-bottom: 1px solid var(--line);
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  transition: border-color var(--transition-speed) ease, color var(--transition-speed) ease;
}
.exam-box__body {
  padding: 1rem;
  font-size: 0.88rem;
  line-height: 1.6;
  color: var(--fg-muted);
  transition: color var(--transition-speed) ease;
}
.exam-box__body p { margin-bottom: 0.5rem; }
.exam-box pre {
  font-family: 'JetBrains Mono', monospace;
  font-variant-ligatures: none;
  background: var(--secondary-bg);
  padding: 0.7rem 0.9rem;
  border-radius: 4px;
  font-size: 0.72rem;
  line-height: 1.5;
  overflow-x: auto;
  margin: 0.6rem 0;
  color: var(--fg);
  transition: background var(--transition-speed) ease, color var(--transition-speed) ease;
}

/* ─── Term popovers ─── */
.term {
  border-bottom: 1px dotted var(--fg-muted);
  cursor: help;
  position: relative;
  transition: border-color var(--transition-speed) ease;
}
.term__popover {
  position: absolute;
  bottom: calc(100% + 8px);
  left: 50%;
  transform: translateX(-50%);
  background: var(--fg);
  color: var(--bg);
  padding: 0.6rem 0.9rem;
  border-radius: 4px;
  font-size: 0.8rem;
  font-family: 'DM Sans', sans-serif;
  font-style: normal;
  font-weight: 400;
  line-height: 1.5;
  width: 260px;
  max-width: 90vw;
  pointer-events: none;
  z-index: 100;
  opacity: 0;
  transition: opacity 0.2s ease;
  text-align: left;
}
.term__popover::after {
  content: '';
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%);
  border: 5px solid transparent;
  border-top-color: var(--fg);
}
.term:hover .term__popover,
.term.is-open .term__popover { opacity: 1; pointer-events: auto; }

/* ─── Quiet links after sections ─── */
.quiet-link {
  display: block;
  font-size: 0.88rem;
  color: var(--fg-muted);
  text-decoration: none;
  padding: 1.5rem 0;
  margin: 1rem 0;
  border-top: 1px solid var(--line);
  opacity: 0.6;
  transition: opacity 0.2s ease, color var(--transition-speed) ease, border-color var(--transition-speed) ease;
}
.quiet-link:hover { opacity: 1; }

/* ═══ CALENDAR ═══ */
.calendar-column {
  position: sticky;
  top: 0;
  height: 100vh;
  padding: 10vh 1.5rem 0 1.5rem;
  transition: opacity 0.6s ease;
  display: flex;
  flex-direction: column;
  align-self: start;
}

.cal-bg-strip {
  position: fixed;
  top: 0;
  bottom: 0;
  right: 0;
  width: calc(340px + 2rem + max(0px, (100vw - 1200px) / 2));
  background: rgba(0,0,0,0.025);
  z-index: 4;
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.6s ease, background var(--transition-speed) ease;
}
.cal-bg-strip.is-visible { opacity: 1; }
.dark-mode .cal-bg-strip { background: rgba(255,255,255,0.03); }
.warm-mode .cal-bg-strip { background: rgba(0,0,0,0.02); }
.warm-dark-mode .cal-bg-strip { background: rgba(255,255,255,0.025); }

.calendar-sticky {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

#calendarContainer {
  flex-shrink: 0;
  position: relative;
}

.calendar-month {
  position: absolute;
  top: 0; left: 0;
  width: 100%;
  opacity: 0;
  transition: opacity 0.8s ease;
  pointer-events: none;
}

.calendar-month.is-visible {
  opacity: 1;
  pointer-events: auto;
  position: relative;
}

.month-name {
  font-family: 'JetBrains Mono', monospace;
  font-size: 1rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--calendar-text);
  margin-bottom: 1rem;
  transition: color var(--transition-speed) ease;
}

.month-year { opacity: 0.5; }

.cal-wrapper {
  position: relative;
  padding-left: 22px;
}

.cal-grid {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 3px;
  margin-bottom: 1.25rem;
}

.cal-header {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.75rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--calendar-text);
  text-align: center;
  padding: 0 0 10px 0;
  transition: color var(--transition-speed) ease;
}

.cal-cell {
  aspect-ratio: 1;
  border: 1px solid transparent;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 2px;
}

.cal-cell.has-day {
  border-color: var(--calendar-line);
  transition: border-color var(--transition-speed) ease, background 0.4s ease, box-shadow 0.4s ease;
}

.cal-cell .day-num {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.8rem;
  color: var(--calendar-text);
  opacity: 0;
  transition: opacity 0.3s ease, color var(--transition-speed) ease;
}

.cal-cell.has-deadline .day-num {
  color: var(--calendar-deadline);
  font-weight: 500;
}

.cal-cell.has-deadline.is-revealed .day-num { opacity: 1; }

.cal-cell.has-deadline.primary.is-revealed {
  background: var(--accent-bg);
  border-color: var(--accent-border);
  box-shadow: var(--accent-glow);
}

.cal-cell.has-deadline.secondary.is-revealed {
  background: var(--secondary-bg);
  border-color: var(--secondary-border);
  box-shadow: none;
}

.week-marker {
  position: absolute;
  left: 2px;
  width: 0;
  height: 0;
  border-top: 5px solid transparent;
  border-bottom: 5px solid transparent;
  border-left: 8px solid var(--marker-color);
  transition: top 0.4s ease, border-left-color var(--transition-speed) ease;
  z-index: 2;
  display: none;
}

.deadline-list {
  flex: 1;
  min-height: 0;
  overflow: hidden;
  position: relative;
}

.deadline-list::after {
  content: '…';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  text-align: center;
  background: linear-gradient(transparent, var(--bg));
  padding: 1.5rem 0 0.25rem;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.75rem;
  color: var(--fg-muted);
  opacity: 0;
  transition: opacity 0.3s ease, background var(--transition-speed) ease, color var(--transition-speed) ease;
  pointer-events: none;
}

.deadline-list.is-overflowing::after {
  opacity: 1;
}

.deadline-item {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 5px 0;
  opacity: 0;
  transform: translateY(6px);
  transition: opacity 0.5s ease, transform 0.5s ease;
  position: absolute;
  width: 100%;
  left: 0;
}

.deadline-item.is-shown {
  opacity: 1;
  transform: translateY(0);
  position: relative;
}

.deadline-item.is-fading { opacity: 0.2; }

.deadline-dot {
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--accent);
  flex-shrink: 0;
  margin-top: 4px;
  transition: background var(--transition-speed) ease;
}

.deadline-dot.secondary { background: var(--calendar-secondary); }

.deadline-label {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.85rem;
  line-height: 1.55;
  color: var(--calendar-deadline);
  letter-spacing: 0.01em;
  transition: color var(--transition-speed) ease;
}

.deadline-label.secondary { color: var(--calendar-secondary); }

.weeks-counter {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.8rem;
  color: var(--fg-muted);
  letter-spacing: 0.06em;
  text-align: center;
  padding: 1.25rem 0 6rem 0;
  border-top: 1px solid var(--calendar-line);
  margin-top: auto;
  flex-shrink: 0;
  transition: color var(--transition-speed) ease, border-color var(--transition-speed) ease;
}

.weeks-counter .num {
  font-size: 1.8rem;
  font-weight: 500;
  color: var(--accent);
  display: block;
  margin-bottom: 2px;
  transition: color var(--transition-speed) ease;
}

/* ═══ OUTRO ═══ */
.outro {
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 8rem 2rem;
}

.outro p {
  font-family: var(--font-display);
  font-size: 1.3rem;
  font-weight: 300;
  max-width: 500px;
  line-height: 1.6;
  color: var(--fg-muted);
  transition: color var(--transition-speed) ease;
}

/* ═══ MOBILE ═══ */
.mobile-calendar-break { display: none; }

@media (max-width: 768px) {
  html { font-size: 17px; }
  .topbar-uni-name { display: none; }
  .topbar-separator { display: none; }
  .topbar-faculty { font-size: 0.7rem; }
  .scrollytelling {
    grid-template-columns: 1fr;
    padding: 0 1.5rem;
  }
  .calendar-column { display: none; }

  .mobile-progress {
    display: block !important;
    position: fixed;
    top: 42px; left: 0; right: 0;
    z-index: 100;
    padding: 14px 1.5rem 12px;
    background: var(--bg);
    border-bottom: 1px solid var(--calendar-line);
    transition: background var(--transition-speed) ease, border-color var(--transition-speed) ease;
  }

  .mobile-progress-bar {
    height: 4px;
    background: var(--calendar-line);
    border-radius: 2px;
    overflow: hidden;
    margin-bottom: 6px;
    transition: background var(--transition-speed) ease;
  }

  .mobile-progress-fill {
    height: 100%;
    background: var(--accent);
    width: 0%;
    transition: width 0.3s ease, background var(--transition-speed) ease;
    border-radius: 2px;
  }

  .mobile-progress-label {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.8rem;
    color: var(--calendar-text);
    letter-spacing: 0.06em;
    transition: color var(--transition-speed) ease;
  }

  .story-step .inner { padding: 1rem 1.5rem; }
  .story-step { min-height: 40vh; }

  .cal-bg-strip { display: none !important; }

  .mobile-calendar-break {
    display: none;
    flex-direction: column;
    padding: 3.5rem 1rem 2rem;
    min-height: 40vh;
    justify-content: center;
  }
  .mobile-calendar-break.is-visible {
    display: flex;
  }
  .mobile-calendar-break .cal-wrapper {
    padding-left: 0;
  }
  .mobile-calendar-break .week-marker {
    display: none;
  }
  .mobile-calendar-break .cal-grid {
    gap: 4px;
    margin-bottom: 1.5rem;
  }
  .mobile-calendar-break .cal-cell {
    min-width: 0;
  }
  .mobile-calendar-break .month-name {
    font-size: 1.1rem;
    margin-bottom: 1.2rem;
    text-align: center;
  }
  .mobile-calendar-break .deadline-list {
    margin-top: 0.5rem;
  }

  .sched { min-width: 520px; }
  .sched--7d { min-width: 700px; }

  .story-step .inner.inner--wide,
  .section-intro--wide .inner {
    max-width: calc(100vw - 3rem);
    min-width: 0;
  }

  .section-intro { padding: 10vh 0 3vh; }

  .click-gate { min-height: 30vh; padding: 3rem 1.5rem; }
  .gate-btn { padding: 12px 36px; font-size: 0.95rem; }
}

@media (min-width: 769px) { .mobile-progress { display: none; } }

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

/* ═══ READER MODE ═══ */
body.reader-mode,
body.reader-mode * {
  --bg: #f5f2ed;
  --fg: #1a1a1a;
  --fg-muted: #666;
  --accent: #c0392b;
  --accent-bg: rgba(192,57,43,0.12);
  --accent-border: rgba(192,57,43,0.5);
  --accent-glow: none;
  --secondary-bg: rgba(26,26,26,0.06);
  --secondary-border: rgba(26,26,26,0.22);
  --marker-color: rgba(26,26,26,0.32);
  --line: rgba(26,26,26,0.12);
  --calendar-line: rgba(26,26,26,0.18);
  --calendar-text: rgba(26,26,26,0.45);
  transition: none;
}

body.reader-mode .scrollytelling {
  display: block;
  max-width: none;
}

body.reader-mode .calendar-column { display: none; }

body.reader-mode .story-step .inner,
body.reader-mode .section-intro .inner {
  max-width: 700px;
  margin: 0 auto;
  padding: 0 2rem 2.5rem;
}

body.reader-mode .story-step .inner.inner--wide,
body.reader-mode .section-intro--wide .inner {
  max-width: 900px;
}

body.reader-mode .story-step,
body.reader-mode .section-intro {
  min-height: 0;
  padding: 0;
}

body.reader-mode .story-section.is-locked {
  display: block;
}

body.reader-mode .click-gate,
body.reader-mode .mobile-progress,
body.reader-mode .cal-bg-strip,
body.reader-mode .mobile-calendar-break,
body.reader-mode .hero .scroll-hint { display: none !important; }

body.reader-mode .hero .reader-link { display: none; }

body.reader-mode .hero {
  min-height: 50vh;
}

body.reader-mode .hero .reading-time {
  position: relative;
  bottom: auto;
}

body.reader-mode .outro {
  padding: 4rem 2rem;
}

body.reader-mode .week-label {
  margin-top: 2.5rem;
  padding-top: 2rem;
  border-top: 1px solid rgba(26,26,26,0.12);
}

body.reader-mode .story-section:first-child .story-step:first-child .week-label {
  border-top: none;
  margin-top: 0;
}

body.reader-mode .quiet-link {
  max-width: 700px;
  margin-left: auto;
  margin-right: auto;
  padding-left: 2rem;
  padding-right: 2rem;
}

body.reader-mode .term__popover { display: none; }
body.reader-mode .term {
  border-bottom: none;
  cursor: auto;
}

/* Reader-mode legal footer */
body.reader-mode .reader-footer {
  display: block;
  max-width: 700px;
  margin: 3rem auto;
  padding: 2rem;
  text-align: center;
  font-size: 0.7rem;
  color: var(--fg-muted);
}
body.reader-mode .reader-footer a {
  color: var(--fg-muted);
  text-decoration: none;
  opacity: 0.6;
}
body.reader-mode .reader-footer a:hover { opacity: 1; }
.reader-footer { display: none; }

/* ═══ PRINT ═══ */
@media print {
  body { overflow: auto !important; }
  .hero {
    min-height: 40vh;
  }
  .hero .scroll-hint,
  .hero .reader-link,
  .click-gate, .mobile-progress,
  .cal-bg-strip, .mobile-calendar-break { display: none !important; }
  .hero .reading-time {
    position: relative !important;
    bottom: auto !important;
    margin-top: 1rem;
  }
  .scrollytelling {
    display: block !important;
  }
  .calendar-column { display: none !important; }
  .story-section.is-locked { display: block !important; }
  .story-step {
    min-height: 0 !important;
    padding: 0.5rem 0 !important;
  }
  .story-step .inner {
    max-width: 100% !important;
    padding-bottom: 1.5rem !important;
  }
  .reader-footer { display: block !important; }
  h2 { page-break-after: avoid; }
  .story-step, .section-intro { break-inside: avoid; }
  .term__popover { display: none !important; }
  .cc-prompt, .cc-bugfix, .cc-builder-btn, .cc-overlay { display: none !important; }
}

/* ═══ CODING CHALLENGE: Shared ═══ */

.cc-check50 {
  border: 1px solid var(--line);
  border-radius: 6px;
  overflow: hidden;
}

.cc-check50__header,
.cc-code__header,
.cc-workspace__header,
.cc-solution__header {
  font-family: 'JetBrains Mono', monospace;
  padding: 0.55rem 1rem;
  font-size: 0.62rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.cc-check50__header,
.cc-code__header,
.cc-workspace__header {
  border-bottom: 1px solid var(--line);
  transition: border-color var(--transition-speed) ease, color var(--transition-speed) ease;
}

.cc-check50__header,
.cc-workspace__header {
  color: var(--fg-muted);
}

.cc-check50__body {
  padding: 0.6rem 0.8rem;
}

.cc-check50__test {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.68rem;
  line-height: 1.4;
  padding: 0.35rem 0.4rem;
  border-radius: 4px;
  margin-bottom: 0.25rem;
  opacity: 0;
  transform: translateY(4px);
  transition: opacity 0.3s ease, transform 0.3s ease;
}

.cc-check50__test.visible {
  opacity: 1;
  transform: translateY(0);
}

.cc-check50__test.pass { color: #27ae60; }
.cc-check50__test.fail { color: #c0392b; }

.cc-check50__icon {
  display: inline-block;
  width: 1.3em;
}

.cc-check50__success {
  font-family: 'DM Sans', sans-serif;
  font-size: 0.82rem;
  font-weight: 500;
  color: #27ae60;
  padding: 0.5rem 0.4rem 0.3rem;
  opacity: 0;
  transition: opacity 0.4s ease;
}

.cc-check50__success.visible { opacity: 1; }

/* ═══ CODING CHALLENGE: Bugfix ═══ */

.cc-prompt {
  font-family: 'DM Sans', sans-serif;
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--accent);
  margin-bottom: 0.6rem;
}

.cc-bugfix {
  max-width: 540px;
}

.cc-code {
  border: 1px solid var(--line);
  border-radius: 6px;
  overflow: hidden;
  margin-bottom: 1.5rem;
  transition: border-color var(--transition-speed) ease;
}

.cc-code__header {
  color: var(--accent);
}

.cc-code__body {
  padding: 0.7rem 0.9rem;
  background: var(--secondary-bg);
  overflow-x: auto;
  transition: background var(--transition-speed) ease;
}

.cc-code__body pre {
  font-family: 'JetBrains Mono', monospace;
  font-variant-ligatures: none;
  font-size: 0.72rem;
  line-height: 1.7;
  color: var(--fg);
  white-space: pre;
  transition: color var(--transition-speed) ease;
}

.cc-line-num {
  color: var(--fg-muted);
  opacity: 0.5;
  user-select: none;
  display: inline-block;
  width: 1.5em;
  text-align: right;
  margin-right: 1em;
}

.cc-op-input {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.72rem;
  font-variant-ligatures: none;
  width: 2.4em;
  padding: 0.1em 0.25em;
  border: 1.5px solid var(--accent-border);
  border-radius: 3px;
  background: var(--accent-bg);
  color: var(--accent);
  text-align: center;
  outline: none;
  font-weight: 500;
  transition: border-color 0.2s, box-shadow 0.2s, background var(--transition-speed) ease, color var(--transition-speed) ease;
  vertical-align: baseline;
  line-height: 1.4;
}

.cc-op-input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 2px rgba(192,57,43,0.15);
}

.cc-op-input.is-correct {
  border-color: #27ae60;
  background: rgba(39,174,96,0.08);
  color: #27ae60;
}

.cc-preview {
  margin-bottom: 1.5rem;
}

.cc-preview__label {
  font-family: 'DM Sans', sans-serif;
  font-size: 0.68rem;
  font-weight: 500;
  color: var(--fg-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 0.5rem;
  transition: color var(--transition-speed) ease;
}

.cc-preview__output,
.cc-output-preview__content {
  font-family: 'JetBrains Mono', monospace;
  font-variant-ligatures: none;
  line-height: 1.5;
  background: var(--secondary-bg);
  border: 1px solid var(--line);
  border-radius: 6px;
  white-space: pre;
  color: var(--fg);
  transition: border-color 0.3s, background var(--transition-speed) ease, color var(--transition-speed) ease;
}

.cc-preview__output {
  font-size: 0.78rem;
  padding: 0.8rem 1rem;
  min-height: 4.5rem;
}

.cc-preview__output.is-correct,
.cc-output-preview__content.is-correct {
  border-color: rgba(39,174,96,0.4);
}

.cc-preview__output.is-empty,
.cc-preview__output.is-error,
.cc-output-preview__content.is-empty,
.cc-output-preview__content.is-error {
  color: var(--fg-muted);
  font-style: italic;
  font-family: 'DM Sans', sans-serif;
}

/* ═══ CODING CHALLENGE: Builder Teaser ═══ */

.cc-builder-tease {
  font-family: 'Lora', Georgia, serif;
  font-style: italic;
  font-size: 1.1rem;
  color: var(--fg-muted);
  margin-bottom: 1rem;
  transition: color var(--transition-speed) ease;
}

.cc-builder-btn {
  font-family: 'DM Sans', sans-serif;
  font-size: 1rem;
  font-weight: 400;
  padding: 14px 48px;
  border: 1px solid var(--line);
  border-radius: 4px;
  background: var(--bg);
  color: var(--fg);
  cursor: pointer;
  letter-spacing: 0.04em;
  transition: background 0.2s ease, color 0.2s ease, border-color 0.2s ease, transform 0.15s ease;
}

.cc-builder-btn:hover {
  background: var(--fg);
  color: var(--bg);
  border-color: var(--fg);
  transform: translateY(-1px);
}

.cc-builder-btn:active {
  transform: translateY(0);
}

/* ═══ CODING CHALLENGE: Builder Overlay ═══ */

.cc-overlay {
  position: fixed;
  inset: 0;
  z-index: 200;
  background: var(--bg);
  overflow-y: auto;
  transition: background var(--transition-speed) ease;
}

.cc-overlay[hidden] { display: none; }

.cc-overlay__bar {
  display: none;
}

.cc-overlay__close {
  font-family: 'DM Sans', sans-serif;
  font-size: 0.85rem;
  background: none;
  border: none;
  color: var(--fg-muted);
  cursor: pointer;
  padding: 0.3rem 0;
  transition: color 0.2s;
}

.cc-overlay__close:hover { color: var(--fg); }

.cc-overlay__content {
  max-width: 1060px;
  margin: 0 auto;
  padding: 3.5rem 1.5rem 4rem;
}

/* ═══ CODING CHALLENGE: Builder UI ═══ */

.cc-task {
  position: sticky;
  top: 4rem;
  align-self: start;
}

.cc-builder__top {
  margin-bottom: 1.2rem;
}

.cc-task__title {
  font-family: 'DM Sans', sans-serif;
  font-size: 0.85rem;
  font-weight: 500;
  line-height: 1.45;
  margin-bottom: 0.8rem;
  color: var(--fg);
  transition: color var(--transition-speed) ease;
}

.cc-task__instructions {
  font-family: 'DM Sans', sans-serif;
  font-size: 0.78rem;
  line-height: 1.5;
  color: var(--fg-muted);
  margin-bottom: 1rem;
  transition: color var(--transition-speed) ease;
}

.cc-task__goal {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.cc-task__goal-label {
  font-size: 0.62rem;
  font-weight: 500;
  color: var(--fg-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  transition: color var(--transition-speed) ease;
}

.cc-task__goal-output {
  font-family: 'JetBrains Mono', monospace;
  font-variant-ligatures: none;
  font-size: 0.74rem;
  line-height: 1.45;
  background: var(--secondary-bg);
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 0.6rem 0.8rem;
  white-space: pre;
  color: var(--fg);
  transition: background var(--transition-speed) ease, border-color var(--transition-speed) ease, color var(--transition-speed) ease;
}

.cc-palette {
  display: flex;
  gap: 0.4rem;
  flex-wrap: wrap;
  margin-bottom: 1.5rem;
}

.cc-palette__btn {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.68rem;
  padding: 0.45rem 0.7rem;
  border: 1px solid var(--line);
  border-radius: 5px;
  background: var(--bg);
  color: var(--fg);
  cursor: grab;
  transition: border-color 0.15s, box-shadow 0.15s, transform 0.1s, background var(--transition-speed) ease, color var(--transition-speed) ease;
  min-height: 2.4rem;
  display: flex;
  align-items: center;
  gap: 0.3rem;
  user-select: none;
  -webkit-user-select: none;
}

.cc-palette__btn:hover {
  border-color: var(--accent-border);
  box-shadow: 0 1px 4px rgba(0,0,0,0.06);
}

.cc-palette__btn:active {
  cursor: grabbing;
  transform: scale(0.97);
}

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

/* Builder 3-column layout */

.cc-builder__main {
  display: grid;
  grid-template-columns: 190px 1fr 260px;
  gap: 1.2rem;
  margin-bottom: 1.5rem;
}

.cc-workspace {
  border: 1px solid var(--line);
  border-radius: 6px;
  overflow: hidden;
  margin-bottom: 1rem;
  transition: border-color var(--transition-speed) ease;
}

.cc-workspace__header {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.cc-workspace__clear {
  font-family: 'DM Sans', sans-serif;
  font-size: 0.65rem;
  color: var(--fg-muted);
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.1rem 0.3rem;
  border-radius: 3px;
  transition: color 0.2s;
}
.cc-workspace__clear:hover { color: var(--accent); }

.cc-workspace__body {
  padding: 0.6rem;
  min-height: 80px;
  background: var(--secondary-bg);
  transition: background var(--transition-speed) ease;
}

.cc-workspace__empty {
  font-family: 'DM Sans', sans-serif;
  font-size: 0.78rem;
  color: var(--fg-muted);
  text-align: center;
  padding: 1.5rem;
  opacity: 0.6;
}

/* Blocks */

.cc-block {
  display: flex;
  align-items: flex-start;
  gap: 0.3rem;
  margin-bottom: 0.3rem;
  animation: ccBlockIn 0.2s ease;
}

@keyframes ccBlockIn {
  from { opacity: 0; transform: translateY(-4px); }
  to { opacity: 1; transform: translateY(0); }
}

.cc-block__content {
  flex: 1;
  font-family: 'JetBrains Mono', monospace;
  font-variant-ligatures: none;
  font-size: 0.68rem;
  line-height: 1.5;
  padding: 0.4rem 0.6rem;
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: 4px;
  min-height: 2.2rem;
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.2rem;
  cursor: grab;
  transition: box-shadow 0.15s, border-color 0.15s, background var(--transition-speed) ease, color var(--transition-speed) ease;
}

.cc-block__content:active { cursor: grabbing; }

.cc-block--for .cc-block__content {
  flex-direction: column;
  align-items: stretch;
}

.cc-block--for .cc-block__header-row {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.2rem;
  cursor: grab;
}

.cc-block--for .cc-block__header-row:active { cursor: grabbing; }

.cc-block--for .cc-block__body {
  margin-top: 0.3rem;
  padding: 0.4rem;
  padding-left: 0.8rem;
  background: var(--secondary-bg);
  border-left: 2px solid var(--line);
  border-radius: 0 4px 4px 0;
  min-height: 2.4rem;
  transition: background var(--transition-speed) ease, border-color var(--transition-speed) ease;
}

.cc-block--for .cc-block__body .cc-block__content {
  background: var(--bg);
}

.cc-block__body-empty {
  font-family: 'DM Sans', sans-serif;
  font-size: 0.68rem;
  color: var(--fg-muted);
  opacity: 0.5;
  padding: 0.3rem 0;
  text-align: center;
}

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

.cc-block__controls {
  display: flex;
  flex-direction: column;
  gap: 1px;
  flex-shrink: 0;
  padding-top: 0.25rem;
}

.cc-block__btn {
  font-family: 'DM Sans', sans-serif;
  font-size: 0.6rem;
  width: 1.4rem;
  height: 1.2rem;
  display: flex;
  align-items: center;
  justify-content: center;
  background: none;
  border: 1px solid var(--line);
  border-radius: 3px;
  color: var(--fg-muted);
  cursor: pointer;
  transition: color 0.15s, border-color 0.15s;
  padding: 0;
  line-height: 1;
}

.cc-block__btn:hover {
  color: var(--fg);
  border-color: var(--secondary-border);
}

.cc-block__btn--delete:hover {
  color: var(--accent);
  border-color: var(--accent-border);
}

.cc-block select {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.65rem;
  padding: 0.1em 0.2em;
  border: 1px solid var(--line);
  border-radius: 3px;
  background: var(--bg);
  color: var(--fg);
  cursor: pointer;
  outline: none;
  transition: background var(--transition-speed) ease, color var(--transition-speed) ease, border-color var(--transition-speed) ease;
}

.cc-block select:focus {
  border-color: var(--accent-border);
}

/* Drag & Drop */

.cc-drop-indicator {
  height: 3px;
  background: var(--accent);
  border-radius: 2px;
  margin: 2px 0;
  pointer-events: none;
  transition: opacity 0.15s;
}

.cc-builder.is-dragging .cc-workspace__body {
  background: var(--secondary-bg);
}

.cc-builder.is-dragging .cc-block__body {
  border-color: var(--accent-border);
  background: var(--accent-bg);
}

.cc-builder.is-dragging .cc-block__body-empty {
  color: var(--accent);
  opacity: 0.7;
}

.cc-builder.is-dragging .cc-workspace__empty {
  color: var(--accent);
  opacity: 0.8;
}

.cc-builder.is-dragging .cc-workspace__insert,
.cc-builder.is-dragging .cc-block__insert-btn {
  opacity: 0.3;
  pointer-events: none;
}

.cc-block.is-drag-source {
  opacity: 0.25;
}

/* Click-based insert (mobile fallback) */

.cc-workspace__insert {
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: 'DM Sans', sans-serif;
  font-size: 0.68rem;
  color: var(--fg-muted);
  background: none;
  border: 1.5px dashed var(--line);
  border-radius: 5px;
  padding: 0.5rem;
  cursor: pointer;
  width: 100%;
  margin-top: 0.3rem;
  transition: color 0.15s, border-color 0.15s, background 0.15s, opacity 0.15s;
}

.cc-workspace__insert:hover {
  color: var(--accent);
  border-color: var(--accent-border);
  background: var(--accent-bg);
}

.cc-block__insert-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: 'DM Sans', sans-serif;
  font-size: 0.62rem;
  color: var(--fg-muted);
  background: none;
  border: 1px dashed var(--line);
  border-radius: 4px;
  padding: 0.2rem 0.5rem;
  cursor: pointer;
  width: 100%;
  margin-top: 0.2rem;
  transition: color 0.15s, border-color 0.15s, opacity 0.15s;
  opacity: 0.6;
}

.cc-block__insert-btn:hover {
  opacity: 1;
  color: var(--accent);
  border-color: var(--accent-border);
}

.cc-insert-target-active {
  border-color: var(--accent-border) !important;
  background: var(--accent-bg) !important;
  opacity: 1 !important;
}

/* Run area */

.cc-run-area {
  display: flex;
  gap: 0.8rem;
  align-items: center;
}

.cc-run-btn {
  font-family: 'DM Sans', sans-serif;
  font-size: 0.78rem;
  font-weight: 500;
  padding: 0.55rem 1.4rem;
  border: none;
  border-radius: 5px;
  background: var(--fg);
  color: var(--bg);
  cursor: pointer;
  transition: opacity 0.15s, transform 0.1s, background var(--transition-speed) ease, color var(--transition-speed) ease;
}

.cc-run-btn:hover { opacity: 0.85; }
.cc-run-btn:active { transform: scale(0.97); }

/* Output preview */

.cc-output-preview {
  margin-bottom: 1rem;
}

.cc-output-preview__label {
  font-size: 0.68rem;
  font-weight: 500;
  color: var(--fg-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 0.4rem;
  transition: color var(--transition-speed) ease;
}

.cc-output-preview__content {
  font-size: 0.74rem;
  line-height: 1.45;
  padding: 0.7rem 0.9rem;
  min-height: 3.5rem;
}

/* Hint (graceful exit) */

.cc-hint {
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 1rem 1.2rem;
  margin-bottom: 1rem;
  opacity: 0;
  transform: translateY(6px);
  transition: opacity 0.5s ease, transform 0.5s ease, border-color var(--transition-speed) ease;
  pointer-events: none;
}

.cc-hint.visible {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}

.cc-hint__text {
  font-family: 'Lora', Georgia, serif;
  font-style: italic;
  font-size: 0.85rem;
  line-height: 1.5;
  color: var(--fg-muted);
  margin-bottom: 0.7rem;
  transition: color var(--transition-speed) ease;
}

.cc-hint__btn {
  font-family: 'DM Sans', sans-serif;
  font-size: 0.75rem;
  font-weight: 500;
  padding: 0.45rem 1rem;
  border: 1px solid var(--line);
  border-radius: 5px;
  background: var(--bg);
  color: var(--fg);
  cursor: pointer;
  transition: border-color 0.15s, background var(--transition-speed) ease, color var(--transition-speed) ease;
}

.cc-hint__btn:hover {
  border-color: var(--secondary-border);
}

/* Solution */

.cc-solution {
  border: 1px solid rgba(39,174,96,0.3);
  border-radius: 6px;
  overflow: hidden;
  margin-bottom: 1rem;
  display: none;
}

.cc-solution.visible { display: block; }

.cc-solution__header {
  border-bottom: 1px solid rgba(39,174,96,0.2);
  color: #27ae60;
}

.cc-solution__body {
  padding: 0.8rem 1rem;
}

.cc-solution__code {
  font-family: 'JetBrains Mono', monospace;
  font-variant-ligatures: none;
  font-size: 0.68rem;
  line-height: 1.65;
  background: var(--secondary-bg);
  padding: 0.7rem 0.9rem;
  border-radius: 4px;
  white-space: pre;
  color: var(--fg);
  margin-bottom: 0.6rem;
  transition: background var(--transition-speed) ease, color var(--transition-speed) ease;
}

.cc-solution__explain {
  font-family: 'DM Sans', sans-serif;
  font-size: 0.75rem;
  line-height: 1.55;
  color: var(--fg-muted);
  transition: color var(--transition-speed) ease;
}

/* ═══ CODING CHALLENGE: Mobile ═══ */

@media (max-width: 768px) {
  .cc-builder__main {
    grid-template-columns: 1fr;
  }

  .cc-overlay__content {
    padding: 1.5rem 1rem 3rem;
  }

  .cc-task {
    position: static;
  }

  .cc-task__goal {
    flex-direction: row;
    gap: 0.8rem;
    align-items: flex-start;
  }

  .cc-palette { gap: 0.35rem; }
  .cc-palette__btn {
    padding: 0.55rem 0.7rem;
    font-size: 0.72rem;
    min-height: 2.75rem;
    cursor: pointer;
  }

  .cc-block__content { cursor: default; }
  .cc-block--for .cc-block__header-row { cursor: default; }

  .cc-block select {
    font-size: 0.72rem;
    padding: 0.2em 0.3em;
    min-height: 1.8rem;
  }

  .cc-block__btn {
    width: 1.8rem;
    height: 1.6rem;
    font-size: 0.65rem;
  }

  .cc-block__insert-btn {
    padding: 0.45rem 0.5rem;
    font-size: 0.68rem;
    min-height: 2.2rem;
  }

  .cc-workspace__insert {
    padding: 0.6rem;
    font-size: 0.72rem;
    min-height: 2.75rem;
  }

  .cc-run-btn {
    padding: 0.65rem 1.6rem;
    font-size: 0.82rem;
    min-height: 2.75rem;
  }

  .cc-builder-btn { padding: 12px 36px; font-size: 0.95rem; }
}

/* ═══ CODING CHALLENGE: Reader Mode ═══ */

body.reader-mode .cc-bugfix,
body.reader-mode .cc-builder-tease,
body.reader-mode .cc-builder-btn,
body.reader-mode .cc-overlay { display: none !important; }