/* Calm type rhythm and mobile tool-card layouts. */
.tool-card h3,
.episode-ui b,
.poster-title {
  letter-spacing: -0.04em;
  line-height: 0.98;
}

.feature-article .article-art b,
.article-cover b {
  letter-spacing: -0.035em;
  line-height: 0.94;
}

.blog-page:not(.article-page) .feature-article h2,
.blog-page:not(.article-page) .coming-article h2,
.blog-page .article-header h1 {
  letter-spacing: -0.04em;
  line-height: 0.96;
}

.mobile-menu-button,
.mobile-menu-panel {
  display: none;
}

@media (max-width: 900px) {
  .tools { grid-template-columns: 1fr; }
  .tool-card,
  .voice {
    grid-column: auto;
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(210px, 0.82fr);
    gap: 28px;
    align-items: center;
    min-height: 0;
  }
  .tool-card > div:first-child { min-width: 0; }
  .tool-card a { position: static; display: inline-flex; margin-top: 28px; }
  .episode-ui,
  .chat-ui { width: 100%; margin: 0; }
  .episode-ui { max-width: 220px; justify-self: end; }
  .chat-ui { align-self: center; }
}

@media (max-width: 760px) {
  .nav { position: relative; gap: 0; }
  .nav > nav,
  .nav > .language-switch,
  .nav > .theme-switch,
  .nav > .button-small { display: none !important; }

  .mobile-menu-button {
    display: inline-grid;
    place-items: center;
    width: 42px;
    height: 42px;
    margin-left: auto;
    border: 1px solid var(--line);
    border-radius: 50%;
    background: transparent;
    color: var(--ink);
    cursor: pointer;
  }
  .mobile-menu-button span,
  .mobile-menu-button::before,
  .mobile-menu-button::after {
    grid-area: 1 / 1;
    width: 18px;
    height: 1.5px;
    background: currentColor;
    content: "";
    display: block;
    transition: transform 180ms ease, opacity 180ms ease;
  }
  .mobile-menu-button span { position: relative; }
  .mobile-menu-button::before { transform: translateY(-5px); }
  .mobile-menu-button::after { transform: translateY(5px); }
  .mobile-menu-button[aria-expanded="true"] span { opacity: 0; }
  .mobile-menu-button[aria-expanded="true"]::before { transform: translateY(1px) rotate(45deg); }
  .mobile-menu-button[aria-expanded="true"]::after { transform: translateY(-1px) rotate(-45deg); }

  .mobile-menu-panel {
    position: absolute;
    z-index: 30;
    top: calc(100% + 10px);
    right: 0;
    left: 0;
    display: grid;
    gap: 18px;
    padding: 20px;
    border: 1px solid var(--line);
    border-radius: 14px;
    background: var(--paper);
    box-shadow: 0 18px 40px rgba(29, 26, 44, 0.16);
    opacity: 0;
    pointer-events: none;
    transform: translateY(-8px);
    transition: opacity 180ms ease, transform 180ms ease;
  }
  .mobile-menu-panel.is-open { opacity: 1; pointer-events: auto; transform: translateY(0); }
  .mobile-menu-panel nav { display: grid; gap: 12px; }
  .mobile-menu-panel nav a { color: var(--ink); font-size: 17px; font-weight: 600; }
  .mobile-menu-panel .mobile-menu-actions {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 10px;
    padding-top: 16px;
    border-top: 1px solid var(--line);
  }
  .mobile-menu-panel .button-small { display: inline-flex !important; margin-left: auto; }

  .tool-card,
  .voice {
    display: flex;
    flex-direction: column;
    align-items: stretch;
    gap: 26px;
    padding: 28px;
  }
  .tool-card h3 { font-size: clamp(40px, 12vw, 54px); }
  .episode-ui { align-self: flex-start; }
  .chat-ui { align-self: stretch; }
}

:root[data-theme="night"] .mobile-menu-panel {
  background: #211e28;
  color: #f7f1e7;
  box-shadow: 0 18px 40px rgba(0, 0, 0, 0.42);
}

:root[data-theme="night"] .mobile-menu-panel nav a {
  color: #f7f1e7;
}

:root[data-theme="night"] .mobile-menu-panel .language-switch,
:root[data-theme="night"] .mobile-menu-panel .theme-switch {
  background: #15131a;
}

:root[data-theme="night"] .mobile-menu-panel .language-switch a,
:root[data-theme="night"] .mobile-menu-panel .theme-switch button {
  color: #f7f1e7;
}

@media (max-width: 420px) {
  .tool-card,
  .voice { padding: 24px; }
  .mobile-menu-panel .button-small { width: 100%; justify-content: space-between; }
}