/* ═══════════════════════════════════════════════════════════
   SINGOLARITÀ — Design System
   ═══════════════════════════════════════════════════════════ */

/* ── Google Fonts ── */
@import url('https://fonts.googleapis.com/css2?family=EB+Garamond:ital,wght@0,400;0,500;0,600;1,400&display=swap');

/* ── CSS Variables ── */
:root {
  /* Typography */
  --font-family: 'EB Garamond', 'Georgia', serif;
  --font-weight-body: 400;
  --font-weight-title: 500;
  --font-weight-heading: 600;
  --font-size-body: 19px;
  --font-size-title: 100px;
  --font-size-heading: 23px;
  --line-height-body: 1.6;
  --max-width: 780px;
  --padding-lateral: 24px;
  --paragraph-gap: 0.2em;
  --heading-space-above: 2em;
  --heading-space-below: 1em;
  --title-space-above: 16vh;
  --title-space-below: 11vh;
  --spazio-extra: 1.1em;
}

/* ── Light Mode (default) ── */
[data-theme="light"], :root {
  --bg-page: #f8f6f0;
  --text-primary: #1a1918;
  --text-hover: #424140;
  --text-hover-special: #5a3d35;
  --text-hover-active: #1a1918;
  --box-bg: #ffffff;
  --box-border: #e0dcd4;
  --box-shadow-color: rgba(80, 40, 25, 0.5);
  --border-generic: #e0dcd4;
  --btn-benchmark-bg: #f0ede5;
  --btn-benchmark-border: #d5d0c8;
  --btn-benchmark-hover-border: #1a1918;
  --selection-bg: #c45a3b;
  --selection-text: #ffffff;
  --toggle-inactive-bg: #d5d0c8;
  --toggle-circle: #ffffff;
  --terracotta: #994d33;
  --scrollbar-track: #f0ede5;
  --scrollbar-thumb: #c45a3b;
}

/* ── Dark Mode ── */
[data-theme="dark"] {
  --bg-page: #1e1d1b;
  --text-primary: #e5e3dc;
  --text-hover: #b8b5ae;
  --text-hover-special: #c4a898;
  --text-hover-active: #e5e3dc;
  --box-bg: #282725;
  --box-border: #3a3835;
  --box-shadow-color: rgba(120, 80, 60, 0.3);
  --border-generic: #3a3835;
  --btn-benchmark-bg: #2a2928;
  --btn-benchmark-border: #3a3835;
  --btn-benchmark-hover-border: #e5e3dc;
  --selection-bg: #c45a3b;
  --selection-text: #ffffff;
  --toggle-inactive-bg: #3a3835;
  --toggle-circle: #e5e3dc;
  --terracotta: #994d33;
  --scrollbar-track: #232220;
  --scrollbar-thumb: #c45a3b;
}

/* ── Font Size Scaling ── */
[data-font-size="small"] {
  --font-size-body: 16px;
  --font-size-title: 80px;
  --font-size-heading: 20px;
}
[data-font-size="large"] {
  --font-size-body: 22px;
  --font-size-title: 110px;
  --font-size-heading: 26px;
}

/* ── Benchmark Colors ── */
:root {
  --bench-mmlu: #c45a3b;
  --bench-gpqa: #c49a3b;
  --bench-arc: #7a6b99;
  --bench-simple: #4a6a9a;
  --bench-osworld: #8a7560;
  --bench-swe: #7a9a5b;
  --bench-gdp: #3a8a7a;
  --bench-correct: #6b7a4a;
  --bench-wrong: #b34545;
}


/* ═══════════════════════════════════════════════════════════
   BASE RESET & BODY
   ═══════════════════════════════════════════════════════════ */

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

/* ── Custom Scrollbar ── */
/* Webkit (Chrome, Edge, Safari) */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

::-webkit-scrollbar-track {
  background: var(--scrollbar-track);
}

::-webkit-scrollbar-thumb {
  background: var(--scrollbar-thumb);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--terracotta);
}

::-webkit-scrollbar-button {
  display: none;
  width: 0;
  height: 0;
}

::-webkit-scrollbar-corner {
  background: transparent;
}

/* Firefox — standard properties (non interferiscono con ::-webkit-scrollbar) */
@supports not selector(::-webkit-scrollbar) {
  * {
    scrollbar-width: thin;
    scrollbar-color: var(--scrollbar-thumb) var(--scrollbar-track);
  }
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-family);
  font-weight: var(--font-weight-body);
  font-size: var(--font-size-body);
  line-height: var(--line-height-body);
  color: var(--text-primary);
  background-color: var(--bg-page);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  transition: background-color 0.3s ease, color 0.3s ease;
}

::selection {
  background-color: var(--selection-bg);
  color: var(--selection-text);
}

::-moz-selection {
  background-color: var(--selection-bg);
  color: var(--selection-text);
}


/* ═══════════════════════════════════════════════════════════
   LAYOUT
   ═══════════════════════════════════════════════════════════ */

.article-container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--padding-lateral);
  padding-bottom: 8vh;
}


/* ═══════════════════════════════════════════════════════════
   TYPOGRAPHY
   ═══════════════════════════════════════════════════════════ */

/* ── Title ── */
.article-title {
  font-size: var(--font-size-title);
  font-weight: var(--font-weight-title);
  text-align: center;
  margin-top: var(--title-space-above);
  margin-bottom: var(--title-space-below);
  line-height: 1.1;
  letter-spacing: -0.01em;
}

/* ── Section Headings ── */
.section-heading {
  font-size: var(--font-size-heading);
  font-weight: var(--font-weight-heading);
  margin-top: var(--heading-space-above);
  margin-bottom: var(--heading-space-below);
}

/* ── Paragraphs ── */
.article-paragraph {
  margin-bottom: var(--paragraph-gap);
}

/* ── Dramatic Pause ($ markers) ── */
.spazio {
  margin-top: var(--spazio-extra);
}

/* ── Triple Space ($$$ markers) ── */
.spazio-triplo {
  margin-top: calc(var(--spazio-extra) * 3);
}

/* ── Zero Space (€ marker) — next paragraph has 0 gap ── */
.spazio-zero + .article-paragraph {
  margin-top: calc(-1 * var(--paragraph-gap));
}

/* ── Signature ── */
.firma {
  text-align: right;
  margin-top: 2em;
}


/* ═══════════════════════════════════════════════════════════
   HOVER WORDS (TOOLTIP TRIGGERS)
   ═══════════════════════════════════════════════════════════ */

.hover-word {
  font-style: italic;
  color: var(--text-hover);
  cursor: pointer;
  transition: color 0.2s ease;
  position: relative;
}

.hover-word:hover,
.hover-word.active {
  color: var(--text-hover-active);
}

/* Special hover words */
.hover-word[data-hover="risolverla"],
.hover-word[data-hover="resolve_it"],
.hover-word[data-hover="atrocità"],
.hover-word[data-hover="atrocity"],
.hover-word[data-hover="singolarità"],
.hover-word[data-hover="singularity"],
.hover-word[data-hover="palantir"],
.hover-word[data-hover="palantír"] {
  color: var(--text-hover-special);
}

.hover-word[data-hover="risolverla"]:hover,
.hover-word[data-hover="resolve_it"]:hover,
.hover-word[data-hover="atrocità"]:hover,
.hover-word[data-hover="atrocity"]:hover,
.hover-word[data-hover="singolarità"]:hover,
.hover-word[data-hover="singularity"]:hover,
.hover-word[data-hover="palantir"]:hover,
.hover-word[data-hover="palantír"]:hover,
.hover-word[data-hover="risolverla"].active,
.hover-word[data-hover="resolve_it"].active,
.hover-word[data-hover="atrocità"].active,
.hover-word[data-hover="atrocity"].active,
.hover-word[data-hover="singolarità"].active,
.hover-word[data-hover="singularity"].active,
.hover-word[data-hover="palantir"].active,
.hover-word[data-hover="palantír"].active {
  color: var(--text-hover-active);
}


/* ═══════════════════════════════════════════════════════════
   HOVER BOX (TOOLTIP)
   ═══════════════════════════════════════════════════════════ */

.hover-box {
  position: absolute;
  z-index: 1000;
  background: var(--box-bg);
  border: 1px solid var(--box-border);
  border-radius: 6px;
  box-shadow: 0 6px 20px var(--box-shadow-color);
  padding: 14px 16px;
  max-width: 420px;
  min-width: 120px;
  width: fit-content;
  font-style: normal;
  font-size: 16px;
  line-height: 1.5;
  color: var(--text-primary);
  overflow-y: auto;
  max-height: 80vh;
  opacity: 0;
  transform: translateY(4px);
  transition: opacity 0.2s ease, transform 0.2s ease;
  pointer-events: none;
}

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

.hover-box p {
  margin-bottom: 0.5em;
}

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

.hover-box br {
  display: block;
  content: '';
  margin-top: 0.4em;
}

.hover-box img {
  max-width: 100%;
  max-height: min(350px, 55vh);
  width: auto;
  height: auto;
  border-radius: 4px;
  margin: 8px 0;
  display: block;
  object-fit: contain;
}

.hover-box a {
  color: var(--text-hover);
  text-decoration: underline;
  cursor: pointer;
  transition: color 0.2s ease;
}

.hover-box a:hover {
  color: var(--text-hover-active);
}

/* ── Mobile Hover Box ── */
.hover-overlay {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.3);
  z-index: 999;
}

.hover-overlay.visible {
  display: block;
}

.hover-box-mobile {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 1001;
  background: var(--box-bg);
  border-top: 1px solid var(--box-border);
  border-radius: 12px 12px 0 0;
  box-shadow: 0 -6px 20px var(--box-shadow-color);
  padding: 20px 20px 28px;
  height: 40vh;
  min-height: 200px;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  font-style: normal;
  font-size: 16px;
  line-height: 1.5;
  color: var(--text-primary);
  transform: translateY(100%);
  transition: transform 0.3s ease;
}

.hover-box-mobile.visible {
  transform: translateY(0);
}

.hover-box-mobile .swipe-indicator {
  width: 36px;
  height: 4px;
  background: var(--border-generic);
  border-radius: 2px;
  margin: 0 auto 16px;
  flex-shrink: 0;
}

.hover-box-mobile img {
  max-width: 100%;
  max-height: 300px;
  width: auto;
  height: auto;
  border-radius: 4px;
  margin: 8px 0;
  display: block;
}

.hover-box-mobile a {
  color: var(--text-hover);
  text-decoration: underline;
  cursor: pointer;
}


/* ═══════════════════════════════════════════════════════════
   MENU
   ═══════════════════════════════════════════════════════════ */

.menu-toggle {
  position: fixed;
  top: 20px;
  right: 20px;
  z-index: 2000;
  width: 36px;
  height: 36px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  cursor: pointer;
  background: none;
  border: none;
  padding: 4px;
}

.menu-toggle span {
  display: block;
  width: 22px;
  height: 1.5px;
  background: var(--text-primary);
  border-radius: 1px;
  transition: background 0.2s ease;
}

.menu-panel {
  position: fixed;
  top: 60px;
  right: 20px;
  z-index: 2000;
  background: var(--box-bg);
  border: 1px solid var(--box-border);
  border-radius: 8px;
  box-shadow: 0 4px 16px var(--box-shadow-color);
  padding: 16px 20px;
  min-width: 200px;
  opacity: 0;
  transform: translateY(-8px) scale(0.96);
  transition: opacity 0.2s ease, transform 0.2s ease;
  pointer-events: none;
}

.menu-panel.visible {
  opacity: 1;
  transform: translateY(0) scale(1);
  pointer-events: auto;
}

.menu-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 8px 0;
  font-size: 15px;
  color: var(--text-primary);
}

.menu-item + .menu-item {
  border-top: 1px solid var(--border-generic);
}

.menu-item-label {
  font-weight: var(--font-weight-body);
}

/* ── Toggle Pill (iOS style) ── */
.toggle-pill {
  position: relative;
  width: 40px;
  height: 22px;
  background: var(--toggle-inactive-bg);
  border-radius: 11px;
  cursor: pointer;
  transition: background 0.2s ease;
  flex-shrink: 0;
}

.toggle-pill.active {
  background: var(--selection-bg);
}

.toggle-pill .toggle-circle {
  position: absolute;
  top: 2px;
  left: 2px;
  width: 18px;
  height: 18px;
  background: var(--toggle-circle);
  border-radius: 50%;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.15);
  transition: transform 0.2s ease;
}

.toggle-pill.active .toggle-circle {
  transform: translateX(18px);
}

/* ── Language Toggle ── */
.lang-toggle {
  display: flex;
  gap: 0;
  border: 1px solid var(--btn-benchmark-border);
  border-radius: 6px;
  overflow: hidden;
}

.lang-toggle button {
  background: none;
  border: none;
  padding: 3px 10px;
  font-family: var(--font-family);
  font-size: 14px;
  color: var(--text-hover);
  cursor: pointer;
  transition: all 0.2s ease;
}

.lang-toggle button.active {
  background: var(--selection-bg);
  color: var(--selection-text);
}

/* ── Font Size Selector ── */
.font-size-selector {
  display: flex;
  gap: 0;
  border: 1px solid var(--btn-benchmark-border);
  border-radius: 6px;
  overflow: hidden;
}

.font-size-selector button {
  background: none;
  border: none;
  border-right: 1px solid var(--btn-benchmark-border);
  padding: 3px 8px;
  font-family: var(--font-family);
  cursor: pointer;
  color: var(--text-hover);
  transition: all 0.2s ease;
}

.font-size-selector button:last-child {
  border-right: none;
}

.font-size-selector button.active {
  background: var(--selection-bg);
  color: var(--selection-text);
}

.font-size-selector .fs-small { font-size: 11px; }
.font-size-selector .fs-medium { font-size: 15px; }
.font-size-selector .fs-large { font-size: 20px; }


/* ═══════════════════════════════════════════════════════════
   BENCHMARK SECTION
   ═══════════════════════════════════════════════════════════ */

.benchmark-section {
  margin: 2em 0;
}

.benchmark-chart-container {
  width: 100%;
  position: relative;
  margin-bottom: 1.5em;
}

.benchmark-chart-container canvas {
  width: 100%;
  display: block;
}

.benchmark-tooltip {
  display: none;
  position: absolute;
  background: var(--box-bg);
  border: 1px solid var(--box-border);
  border-radius: 4px;
  padding: 4px 8px;
  font-size: 12px;
  font-family: var(--font-family);
  color: var(--text-primary);
  white-space: nowrap;
  pointer-events: none;
  transform: translateX(-50%);
  z-index: 10;
  box-shadow: 0 2px 8px var(--box-shadow-color);
}

/* ── Benchmark Buttons ── */
.benchmark-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  justify-content: center;
  margin-bottom: 1em;
}

.benchmark-btn {
  background: var(--btn-benchmark-bg);
  border: 1px solid var(--btn-benchmark-border);
  border-radius: 6px;
  padding: 6px 14px;
  font-family: var(--font-family);
  font-size: 15px;
  color: var(--text-primary);
  cursor: pointer;
  transition: border-color 0.2s ease, border-width 0.15s ease;
  user-select: none;
}

.benchmark-btn:hover {
  border-color: var(--btn-benchmark-hover-border);
}

.benchmark-btn.active {
  border-width: 2px;
  padding: 5px 13px; /* compensate for wider border */
}

/* ── Benchmark Objections ── */
.benchmark-objection {
  text-align: center;
  color: var(--text-hover);
  font-style: normal;
  margin: 1em 0;
  opacity: 0;
  transition: opacity 0.5s ease;
}

.benchmark-objection.visible {
  opacity: 1;
}

/* ── Benchmark Panel (PC) ── */
.benchmark-panel-overlay {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.3);
  z-index: 1500;
}

.benchmark-panel-overlay.visible {
  display: flex;
  align-items: center;
  justify-content: center;
}

.benchmark-panel {
  background: var(--box-bg);
  border: 1px solid var(--box-border);
  border-radius: 8px;
  box-shadow: 0 8px 32px var(--box-shadow-color);
  padding: 28px 32px;
  max-width: 560px;
  width: 90%;
  max-height: 80vh;
  overflow-y: auto;
  color: var(--text-primary);
  font-size: 16px;
  line-height: 1.5;
}

.benchmark-panel-title {
  font-size: 20px;
  font-weight: var(--font-weight-heading);
  margin-bottom: 12px;
}

.benchmark-panel-description {
  margin-bottom: 16px;
}

.benchmark-panel-question {
  margin-bottom: 16px;
}

.benchmark-panel-question img {
  max-width: 100%;
  border-radius: 4px;
  margin: 8px 0;
}

/* ── Benchmark Answer Buttons ── */
.benchmark-answers {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 16px;
}

.benchmark-answer-btn {
  background: var(--btn-benchmark-bg);
  border: 1px solid var(--btn-benchmark-border);
  border-radius: 6px;
  padding: 5px 12px;
  font-family: var(--font-family);
  font-size: 14px;
  color: var(--text-primary);
  cursor: pointer;
  transition: border-color 0.2s ease;
}

.benchmark-answer-btn.correct {
  border-width: 2px;
  border-color: var(--bench-correct);
  padding: 4px 11px;
}

.benchmark-answer-btn.wrong {
  border-width: 2px;
  border-color: var(--bench-wrong);
  padding: 4px 11px;
}

/* ── Slider ── */
.benchmark-slider-container {
  margin-bottom: 20px;
}

.benchmark-slider-label {
  font-size: 14px;
  color: var(--text-hover);
  margin-bottom: 8px;
}

.benchmark-slider {
  width: 100%;
  height: 4px;
  -webkit-appearance: none;
  appearance: none;
  background: var(--border-generic);
  border-radius: 2px;
  outline: none;
}

.benchmark-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--selection-bg);
  cursor: pointer;
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.2);
}

.benchmark-slider::-moz-range-thumb {
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--selection-bg);
  cursor: pointer;
  border: none;
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.2);
}

.benchmark-slider-value {
  text-align: center;
  font-size: 14px;
  color: var(--text-hover);
  margin-top: 4px;
}

/* ── Add to Graph Button ── */
.benchmark-add-btn {
  display: block;
  width: 100%;
  background: none;
  border: 1px solid var(--btn-benchmark-border);
  border-radius: 6px;
  padding: 10px 20px;
  font-family: var(--font-family);
  font-size: 16px;
  color: var(--text-primary);
  cursor: pointer;
  transition: border-color 0.3s ease-out;
}

.benchmark-add-btn:hover {
  border-color: var(--btn-benchmark-hover-border);
}

.benchmark-add-btn.flash {
  border-color: var(--terracotta);
}

/* ── Mobile Benchmark Panel ── */
@media (max-width: 767px), (pointer: coarse) {
  .benchmark-panel-overlay.visible {
    align-items: flex-end;
  }

  .benchmark-panel {
    width: 100%;
    max-width: 100%;
    max-height: 70vh;
    border-radius: 12px 12px 0 0;
    padding: 20px;
  }
}


/* ═══════════════════════════════════════════════════════════
   COMPLEXITY GRAPH
   ═══════════════════════════════════════════════════════════ */

.complexity-graph-container {
  width: 100%;
  position: relative;
  margin: 1.5em 0;
  touch-action: none; /* for pinch zoom */
}

.complexity-graph-container canvas {
  width: 100%;
  display: block;
  cursor: default;
}

.complexity-labels {
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 180px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  pointer-events: none;
  padding: 20px 0 30px;
}

.complexity-label {
  font-size: 10px;
  color: var(--text-hover);
  white-space: nowrap;
  transition: opacity 0.15s ease, font-weight 0.15s ease;
  line-height: 1.1;
}

.complexity-label.bold {
  font-weight: var(--font-weight-heading);
  color: var(--text-primary);
}

.complexity-label.dimmed {
  opacity: 0;
}

/* ── Complexity Caption ── */
.complexity-caption {
  font-size: 14px;
  color: var(--text-hover);
  text-align: center;
  margin-top: 0.5em;
  line-height: 1.4;
}

.complexity-caption .hover-word {
  font-style: normal;
}

.complexity-caption-sources {
  margin-top: 0.3em;
  font-size: 14px;
}

.complexity-sources-link {
  color: var(--text-hover);
  text-decoration: underline;
  cursor: pointer;
  transition: color 0.2s ease;
}

.complexity-sources-link:hover {
  color: var(--text-hover-active);
}


/* ═══════════════════════════════════════════════════════════
   SHARE BUTTON
   ═══════════════════════════════════════════════════════════ */

.share-btn {
  background: none;
  border: 1px solid var(--btn-benchmark-border);
  border-radius: 6px;
  padding: 8px 20px;
  font-family: var(--font-family);
  font-size: 16px;
  color: var(--text-primary);
  cursor: pointer;
  transition: border-color 0.2s ease;
  display: block;
  margin: 16px auto 0;
  text-align: center;
}

.share-btn:hover {
  border-color: var(--btn-benchmark-hover-border);
}


/* ═══════════════════════════════════════════════════════════
   RESPONSIVE
   ═══════════════════════════════════════════════════════════ */

@media (max-width: 767px) {
  :root {
    --font-size-title: 52px;
    --title-space-above: 10vh;
    --title-space-below: 7vh;
    --padding-lateral: 18px;
  }

  .hover-box {
    display: none !important; /* PC-only tooltip; mobile uses bottom panel */
  }

  .complexity-labels {
    width: 140px;
  }

  .complexity-label {
    font-size: 8px;
  }
}

@media (min-width: 768px) {
  .hover-overlay,
  .hover-box-mobile {
    display: none !important; /* PC uses absolute hover box */
  }
}


/* ═══════════════════════════════════════════════════════════
   FULLSCREEN
   ═══════════════════════════════════════════════════════════ */

:fullscreen body,
:-webkit-full-screen body,
:-moz-full-screen body {
  overflow-y: auto;
}


/* ═══════════════════════════════════════════════════════════
   TRANSITIONS & ANIMATIONS
   ═══════════════════════════════════════════════════════════ */

/* Smooth theme transition for all color properties */
body, .menu-panel, .hover-box, .hover-box-mobile,
.benchmark-panel, .benchmark-btn, .benchmark-add-btn,
.share-btn, .menu-toggle span, .toggle-pill {
  transition-property: background-color, color, border-color, box-shadow;
  transition-duration: 0.3s;
  transition-timing-function: ease;
}

/* Fade-in utility */
.fade-in {
  animation: fadeIn 0.5s ease forwards;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Hide elements */
.hidden {
  display: none !important;
}

.invisible {
  opacity: 0;
  pointer-events: none;
}