/* ==========================================================================
   Parser Preview Iframe
   ========================================================================== */
.parser-preview-frame {
  margin: 34px 0;
  border: 1px solid rgba(127, 127, 127, 0.22);
  background: var(--ink-soft);
}

.parser-preview-iframe {
  display: block;
  width: 100%;
  height: min(325px, 82vh);
  border: 0;
  background: var(--ink);
}

.parser-preview-frame figcaption {
  padding: 12px 16px;
  border-top: 1px solid rgba(127, 127, 127, 0.18);
  color: var(--paper-dim);
  font-size: 0.82rem;
}

/* ==========================================================================
   Embed Word Popup (Iframe Context)
   ========================================================================== */
.embed-word-popup {
  position: absolute;
  z-index: 500;
  min-width: 240px;
  max-width: min(450px, 90vw);
  padding: 0.85rem 0.95rem;
  background: var(--ink-soft);
  color: var(--paper);
  border: 1px solid rgba(127, 127, 127, 0.28);
  font-size: 0.9rem;
}

.embed-word-popup-row {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  padding: 0.24rem 0;
  border-top: 1px solid rgba(127, 127, 127, 0.12);
}

.embed-word-popup-row:first-child {
  border-top: 0;
}

.embed-word-popup-label {
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--paper-dim);
}

.embed-word-popup-value {
  color: var(--paper);
  text-align: right;
}

.embed-word-popup-rules,
.embed-word-popup-empty {
  margin-top: 0.7rem;
  padding-top: 0.65rem;
  border-top: 1px solid rgba(127, 127, 127, 0.18);
  color: var(--paper-dim);
  line-height: 1.55;
}

/* ==========================================================================
   Guide Page Layout
   ========================================================================== */
.guide-page {
  max-width: 1100px;
}

.guide-page .status {
  margin-top: 42px;
  margin-bottom: 0;
}

.guide-main {
  display: block !important;
  padding: 72px 0 92px;
}

.guide-content {
  width: 100%;
  min-width: 0;
  overflow-wrap: anywhere;
}

.guide-hero {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(280px, 0.8fr);
  column-gap: 80px;
  align-items: start;
  margin-bottom: 64px;
}

.guide-content h1 {
  margin: 0;
  font-family: var(--en-font);
  font-size: clamp(2.4rem, 5.2vw, 4.8rem);
  font-weight: 600;
  line-height: 0.96;
  letter-spacing: -0.035em;
  color: var(--paper);
  max-width: 14ch;
}

.guide-content h1 span {
  color: var(--vermillion);
}

.guide-content .lead {
  margin: 6px 0 0;
  font-family: var(--en-font);
  font-size: 1.2rem;
  font-weight: 300;
  line-height: 1.9;
  color: var(--paper-dim);
  max-width: 100%;
}

.guide-content .lead em,
.lesson-section em,
.lesson-section strong,
.concept-box strong,
.faq-item strong {
  font-style: normal;
  color: var(--paper);
  font-weight: 400;
}

.guide-rules-panel.rules-panel.is-visible {
  margin-top: 28px;
  margin-bottom: 0;
}

/* ==========================================================================
   Table of Contents
   ========================================================================== */
.toc-container {
  margin: 0 0 64px 0;
  padding: 24px 30px;
  background: var(--ink-soft);
  border: 1px solid rgba(127, 127, 127, 0.22);
  border-left: 2px solid var(--vermillion);
}

.toc-title {
  margin-bottom: 14px;
  font-family: var(--en-font);
  font-size: 0.78rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--paper-dim);
}

.toc-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  grid-template-rows: repeat(3, auto);  /* enough rows for your longest column */
  grid-auto-flow: column;               /* fills down each column before moving right */
  gap: 12px 24px;
}

.toc-list li a {
  font-family: var(--en-font);
  font-size: 1rem;
  color: var(--paper);
  text-decoration: none;
  transition: color 0.15s ease;
}

.toc-list li a:hover {
  color: var(--vermillion);
}

/* ==========================================================================
   Lesson Sections & Typography
   ========================================================================== */
.lesson-section,
.faq-section {
  margin-top: 70px;
}

.lesson-section:first-of-type {
  margin-top: 0;
}

.section-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 18px;
  font-family: var(--en-font);
  font-size: 0.68rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--vermillion);
}

.section-label::before {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--vermillion);
}

.lesson-section h2,
.faq-section h2 {
  max-width: 760px;
  margin: 0 0 18px;
  font-family: var(--en-font);
  font-size: clamp(1.5rem, 3vw, 3.1rem);
  font-weight: 600;
  line-height: 1.03;
  letter-spacing: -0.02em;
  color: var(--paper);
}

.lesson-section > p,
.concept-box p,
.pattern-card p,
.verb-rule-card p,
.special-case p,
.faq-item p,
.special-list,
.special-list li,
.parser-screenshot-caption,
.parser-preview-frame figcaption {
  font-family: var(--en-font);
  font-size: 1.12rem;
  font-weight: 300;
  line-height: 1.85;
  color: var(--paper-dim);
  margin-bottom: 16px;
  max-width: 100%;
  overflow-wrap: anywhere;
}

.lesson-section > p:last-child,
.concept-box p:last-child,
.special-case p:last-child {
  margin-bottom: 0;
}

p.note {
  font-size: 1.02rem;
  color: var(--paper-dim);
  opacity: 0.85;
}

.jp {
  font-family: var(--ja-font);
  letter-spacing: 0.02em;
}

/* ==========================================================================
   Grids & Content Boxes
   ========================================================================== */
.pattern-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
  margin-top: 34px;
}

.pattern-card,
.concept-box,
.special-case,
.faq-item,
.parser-screenshot-frame {
  background: var(--ink-soft);
  border: 1px solid rgba(127, 127, 127, 0.22);
}

.pattern-card.heiban {
  border-left: 2px solid var(--heiban-color);
}

.pattern-card.heiban::after, .pattern-card.atamadaka::after, .pattern-card.nakadaka::after, .pattern-card.odaka::after {
  content: '';
  position: absolute;
  right: 15px;
  top: 15px;
  bottom: 0;
  width: 20px;
  height: 20px;
  border-radius: 999px;
  box-shadow: inset 0 0 0 1px rgba(0, 0, 0, 0.08);
}

.pattern-card.heiban::after {
  background: var(--heiban-color);
}

.pattern-card.atamadaka::after {
  background: var(--atamadaka-color);
}

.pattern-card.nakadaka::after {
  background: var(--nakadaka-color);
}

.pattern-card.odaka::after {
  background: var(--odaka-color);
}

.pattern-card.atamadaka {
  border-left: 2px solid var(--atamadaka-color);
}

.pattern-card.nakadaka {
  border-left: 2px solid var(--nakadaka-color);
}

.pattern-card.odaka {
  border-left: 2px solid var(--odaka-color);
}

.pattern-card {
  padding: 26px;
  display: flex;
  flex-direction: column;
  opacity: 0;
  animation: fade-up 1s cubic-bezier(0.22, 1, 0.36, 1) 0.18s forwards;
}

.concept-box {
  margin-top: 22px;
  padding: 30px;
}

.special-case, .concept-box {
  margin-top: 22px;
  padding: 30px;
  border-left: 2px solid var(--vermillion);
}

.faq-item {
  padding: 26px;
}

.pattern-card h3,
.concept-box h3,
.special-case h3,
.faq-item h3 {
  margin: 0 0 12px;
  font-family: var(--en-font);
  font-size: clamp(1.25rem, 2vw, 1.55rem);
  font-weight: 500;
  line-height: 1.25;
  color: var(--paper);
}

.pattern-card p {
  margin: 0 0 20px;
  font-family: var(--en-font);
  font-size: 1.2rem;
  font-weight: 300;
  line-height: 1.75;
  color: var(--paper-dim);
}

.special-list {
  margin: 18px 0;
  padding-left: 1.4rem;
}

.special-list li + li {
  margin-top: 10px;
}

/* ==========================================================================
   Visual Assets & Renders
   ========================================================================== */
.akusento-render-target {
  margin-top: auto;
  padding: 18px;
  background: var(--ink);
  border: 1px solid rgba(127, 127, 127, 0.18);
  font-family: var(--ja-font);
  font-size: clamp(1.35rem, 2.2vw, 1.95rem);
  line-height: 2;
  color: var(--paper);
  overflow-x: auto;
  display: flex;
  align-items: center;
}

.parser-screenshot-frame {
  margin-top: 28px;
  margin-bottom: 28px;
  padding: 16px;
  text-align: center;
  border-radius: 4px;
}

.parser-screenshot {
  display: block;
  max-width: 100%;
  height: auto;
  margin: 0 auto;
  border-radius: 2px;
  border: 1px solid rgba(127, 127, 127, 0.18);
}

.parser-screenshot-caption {
  margin-top: 14px;
  font-family: var(--en-font);
  font-size: 0.85rem;
  font-style: italic;
  color: var(--paper-dim);
}

.complex-example-text {
  margin-top: 20px;
}

.complex-example-text .jp {
  display: block;
  margin: 14px 0;
  color: var(--paper);
  font-size: 1.06em;
  line-height: 1.7;
}

/* ==========================================================================
   FAQ Section
   ========================================================================== */
.faq-section {
  display: grid;
  gap: 16px;
}

.faq-section h2 {
  margin-bottom: 8px;
}

/* ==========================================================================
   Responsive Breakpoints
   ========================================================================== */
@media (max-width: 900px) {
  .guide-hero {
    grid-template-columns: 1fr;
    row-gap: 32px;
    margin-bottom: 48px;
  }

  .guide-content h1 {
    max-width: 11ch;
  }
}

@media (max-width: 820px) {
  .pattern-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 720px) {
  .guide-page .status {
    margin-top: 34px;
  }

  .guide-main {
    padding: 56px 0 72px;
  }

  .lesson-section,
  .faq-section {
    margin-top: 64px;
  }

  .guide-content h1 {
    font-size: clamp(2.75rem, 13vw, 4.25rem);
  }

  .guide-content .lead,
  .lesson-section > p,
  .concept-box p,
  .special-case p,
  .faq-item p,
  .special-list {
    font-size: 1.02rem;
  }

  .pattern-card,
  .concept-box,
  .special-case,
  .faq-item {
    padding: 22px;
  }

  .parser-screenshot-frame {
    padding: 10px;
  }
  
  .parser-preview-iframe {
    height: min(450px, 78vh);
  }
  
  .toc-list {
    grid-template-rows: repeat(7, auto);
  }
}

.guide-drop.pitch-drop {
  background-size: 80% 1.5px, 1.5px 33%;
  background-position: calc(100% - -1px) 2px, calc(100% - 0px) 3px;
  padding-left: 2px;
  padding-right: 3px;
}

/* ==========================================================================
   Verb Rule Section
   ========================================================================== */

.verb-rule-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
  margin-top: 28px;
}

.verb-rule-card {
  padding: 28px;
  background: var(--ink-soft);
  border: 1px solid rgba(127, 127, 127, 0.22);
  border-left: 2px solid var(--vermillion);
}

.verb-rule-card h3 {
  margin: 0 0 12px;
  font-family: var(--en-font);
  font-size: clamp(1.25rem, 2vw, 1.55rem);
  font-weight: 500;
  line-height: 1.25;
  color: var(--paper);
}

.verb-rule-card p {
  margin: 0 0 20px;
  font-family: var(--en-font);
  font-size: 1.04rem;
  font-weight: 300;
  line-height: 1.75;
  color: var(--paper-dim);
}

.verb-example-list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid rgba(127, 127, 127, 0.16);
}

.verb-example-list li {
  display: grid;
  grid-template-columns: minmax(110px, 0.7fr) minmax(0, 1fr);
  gap: 16px;
  align-items: baseline;
  padding: 12px 0;
  border-bottom: 1px solid rgba(127, 127, 127, 0.16);
}

.verb-form-label {
  font-family: var(--en-font);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--paper-dim);
}

.verb-example-list .jp {
  color: var(--paper);
  font-size: 1.08rem;
  line-height: 1.55;
}

.verb-table-wrap {
  margin-top: 28px;
  overflow-x: auto;
  border: 1px solid rgba(127, 127, 127, 0.22);
  background: var(--ink-soft);
}

.verb-rule-table {
  width: 100%;
  min-width: 760px;
  border-collapse: collapse;
  font-family: var(--en-font);
}

.verb-rule-table th,
.verb-rule-table td {
  padding: 16px 18px;
  border-bottom: 1px solid rgba(127, 127, 127, 0.16);
  vertical-align: top;
  text-align: left;
}

.verb-rule-table th {
  font-size: 0.72rem;
  letter-spacing: 0.11em;
  text-transform: uppercase;
  color: var(--paper-dim);
  font-weight: 500;
}

.verb-rule-table td {
  color: var(--paper-dim);
  font-size: 0.98rem;
  line-height: 1.65;
}

.verb-rule-table td:first-child {
  color: var(--paper);
  white-space: nowrap;
}

.verb-rule-table .jp {
  color: var(--paper);
  font-size: 1.02rem;
}

@media (max-width: 760px) {
  .verb-rule-grid {
    grid-template-columns: 1fr;
  }

  .verb-rule-card {
    padding: 24px;
  }

  .verb-example-list li {
    grid-template-columns: 1fr;
    gap: 4px;
  }
}

/* ==========================================================================
   Mobile guide fixes
   ========================================================================== */

html,
body {
  overflow-x: hidden;
}

@media (max-width: 760px) {
  .guide-page,
  .guide-main,
  .guide-content,
  .guide-hero,
  .guide-hero-left,
  .guide-hero-right,
  .lesson-section,
  .special-case,
  .concept-box,
  .pattern-card,
  .verb-rule-card,
  .verb-table-wrap {
    min-width: 0;
    width: 100%;
    max-width: 100%;
  }

  .guide-main,
  .guide-content,
  .guide-hero,
  .guide-hero-left,
  .guide-hero-right,
  .toc-container,
  .lesson-section,
  .faq-section {
    max-width: calc(100vw - 56px);
  }

  .guide-main {
    padding: 48px 0 72px;
  }

  .guide-hero {
    display: grid;
    grid-template-columns: 1fr;
    row-gap: 28px;
    margin-bottom: 44px;
  }

  .guide-content h1 {
    font-size: clamp(2.2rem, 10vw, 3.5rem);
    line-height: 0.98;
    overflow-wrap: anywhere;
  }

  .guide-content .lead {
    width: 100%;
    max-width: 100%;
    font-size: 1.02rem;
    line-height: 1.75;
    overflow-wrap: anywhere;
  }

  .toc-container {
    margin-bottom: 48px;
    padding: 20px 22px;
  }

  .toc-list {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .lesson-section,
  .faq-section {
    margin-top: 56px;
  }

  .lesson-section h2,
  .faq-section h2 {
    font-size: clamp(1.7rem, 8vw, 2.5rem);
    overflow-wrap: anywhere;
  }

  .lesson-section > p,
  .concept-box p,
  .special-case p,
  .faq-item p,
  .special-list {
    width: 100%;
    font-size: 1.02rem;
    line-height: 1.75;
    overflow-wrap: anywhere;
  }

  .pattern-grid,
  .verb-rule-grid {
    grid-template-columns: 1fr;
  }

  .pattern-card,
  .concept-box,
  .special-case,
  .verb-rule-card,
  .faq-item {
    padding: 22px;
  }

  .akusento-render-target {
    padding: 14px;
    font-size: clamp(1.2rem, 6vw, 1.55rem);
  }

  .verb-example-list li {
    grid-template-columns: 1fr;
    gap: 4px;
  }

  .verb-table-wrap {
    width: 100%;
    max-width: 100%;
    overflow: visible;
    border: 1px solid rgba(127, 127, 127, 0.22);
    background: var(--ink-soft);
  }

  .verb-rule-table {
    width: 100%;
    min-width: 0;
    max-width: 100%;
    table-layout: auto;
    border-collapse: collapse;
  }

  .verb-rule-table thead {
    display: none;
  }

  .verb-rule-table,
  .verb-rule-table tbody,
  .verb-rule-table tr,
  .verb-rule-table td {
    display: block;
  }

  .verb-rule-table tr {
    display: grid;
    gap: 14px;
    padding: 20px 16px;
    border-bottom: 1px solid rgba(127, 127, 127, 0.18);
  }

  .verb-rule-table tr:last-child {
    border-bottom: 0;
  }

  .verb-rule-table td {
    width: auto !important;
    padding: 0;
    border-bottom: 0;
    font-size: 0.98rem;
    line-height: 1.65;
    overflow-wrap: anywhere;
    word-break: normal;
  }

  .verb-rule-table td::before {
    display: block;
    margin-bottom: 5px;
    font-family: var(--en-font);
    font-size: 0.62rem;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--paper-dim);
  }

  .verb-rule-table .jp {
    display: inline;
    font-size: 1.08rem;
    line-height: 1.8;
    white-space: normal;
    word-break: keep-all;
    overflow-wrap: normal;
  }

  /* Basic conjugation table:
     Form / Heiban example / Kifuku example / What happens */

  .verb-conjugation-table td:nth-child(1)::before {
    content: "Form";
  }

  .verb-conjugation-table td:nth-child(2)::before {
    content: "Heiban example";
  }

  .verb-conjugation-table td:nth-child(3)::before {
    content: "Kifuku example";
  }

  .verb-conjugation-table td:nth-child(4)::before {
    content: "Behavior";
  }

  /* Advanced chain table:
     Base type / Careful form / Contracted form / Pitch behavior */

  .verb-chain-table td:nth-child(1)::before {
    content: "Base type";
  }

  .verb-chain-table td:nth-child(2)::before {
    content: "Careful form";
  }

  .verb-chain-table td:nth-child(3)::before {
    content: "Contracted form";
  }

  .verb-chain-table td:nth-child(4)::before {
    content: "Pitch behavior";
  }

  /* Polite form table:
     Base type / Form / Typical pitch behavior */

  .verb-polite-table td:nth-child(1)::before {
    content: "Base type";
  }

  .verb-polite-table td:nth-child(2)::before {
    content: "Form";
  }

  .verb-polite-table td:nth-child(3)::before {
    content: "Pitch behavior";
  }

  .parser-preview-frame {
    margin: 28px 0;
  }

  .parser-preview-iframe {
    height: min(450px, 78vh);
  }

  .parser-screenshot-frame {
    padding: 10px;
  }
}