@font-face {
  font-family: "Libre Baskerville";
  font-style: normal;
  font-weight: 400 700;
  font-display: swap;
  src: url("fonts/libre-baskerville-normal-latin-ext.woff2") format("woff2");
  unicode-range: U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7,
    U+02DD-02FF, U+0304, U+0308, U+0329, U+1D00-1DBF, U+1E00-1E9F,
    U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C0, U+2113,
    U+2C60-2C7F, U+A720-A7FF;
}

@font-face {
  font-family: "Libre Baskerville";
  font-style: normal;
  font-weight: 400 700;
  font-display: swap;
  src: url("fonts/libre-baskerville-normal-latin.woff2") format("woff2");
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC,
    U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F,
    U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}

@font-face {
  font-family: "Libre Baskerville";
  font-style: italic;
  font-weight: 400;
  font-display: swap;
  src: url("fonts/libre-baskerville-italic-latin-ext.woff2") format("woff2");
  unicode-range: U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7,
    U+02DD-02FF, U+0304, U+0308, U+0329, U+1D00-1DBF, U+1E00-1E9F,
    U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C0, U+2113,
    U+2C60-2C7F, U+A720-A7FF;
}

@font-face {
  font-family: "Libre Baskerville";
  font-style: italic;
  font-weight: 400;
  font-display: swap;
  src: url("fonts/libre-baskerville-italic-latin.woff2") format("woff2");
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC,
    U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F,
    U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}

:root {
  color-scheme: light;
  --font-book: "Libre Baskerville", Baskerville, Georgia, serif;
  --ink: #20292b;
  --muted: #526367;
  --paper: #cfe5e8;
  --panel: #edf5f5;
  --line: #a9c3c7;
  --line-strong: #8fadb2;
  --accent: #3d585d;
  --accent-soft: #d8e9eb;
  --user: #bdd7db;
  --on-accent: #f7fbfb;
  --shadow: 0 18px 55px rgba(32, 55, 59, 0.1);
  --shadow-soft: 0 6px 22px rgba(32, 55, 59, 0.05);
}

* { box-sizing: border-box; }

[hidden] { display: none !important; }

html, body { min-height: 100%; min-height: 100dvh; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-book);
}

.shell {
  width: min(880px, 100%);
  min-height: 100vh;
  margin: 0 auto;
  display: grid;
  grid-template-rows: auto 1fr auto;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 3;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.4rem 1.5rem 1.1rem;
  background: color-mix(in srgb, var(--paper) 91%, transparent);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid color-mix(in srgb, var(--line) 75%, transparent);
}

.topbar-controls {
  display: flex;
  align-items: center;
  gap: 0.65rem;
}

.language-select {
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--paper);
  color: var(--muted);
  padding: 0.45rem 0.7rem;
  font: inherit;
}

.header-action {
  border: 0;
  padding: .45rem .25rem;
  background: transparent;
  color: var(--accent);
  font: inherit;
  font-size: .76rem;
  cursor: pointer;
}
.header-action:hover { text-decoration: underline; text-underline-offset: .2em; }

.icon-button {
  display: grid;
  place-items: center;
  flex: 0 0 2.25rem;
  min-width: 2.25rem;
  min-height: 2.25rem;
  border: 1px solid var(--line);
  border-radius: 50%;
  background: var(--panel);
  color: var(--accent);
  font: inherit;
  cursor: pointer;
}
.icon-button:hover { background: var(--accent-soft); border-color: var(--line-strong); }

h1 {
  margin: 0;
  font-family: var(--font-book);
  font-size: clamp(1.3rem, 2.6vw, 1.55rem);
  font-weight: 700;
  letter-spacing: 0.015em;
  white-space: nowrap;
}

.topbar p { margin: .2rem 0 0; color: var(--muted); font-size: .86rem; }

.coverage {
  flex: 0 0 auto;
  padding: .4rem .7rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--muted);
  background: var(--panel);
  font-size: .76rem;
}

.messages { padding: 2.4rem 1.5rem 10rem; }

.message {
  display: flex;
  gap: .8rem;
  margin: 0 0 1.8rem;
  animation: appear .24s ease-out;
}

.message.user { justify-content: flex-end; }
.message.user .bubble { max-width: min(78%, 630px); background: var(--user); border-radius: 18px 18px 4px 18px; }
.message.assistant .bubble { max-width: min(88%, 720px); }

.avatar {
  display: grid;
  place-items: center;
  flex: 0 0 2rem;
  height: 2rem;
  border-radius: 50%;
  background: var(--accent);
  color: var(--on-accent);
  font-family: var(--font-book);
  font-size: .72rem;
}

.bubble {
  padding: .85rem 1rem;
  border-radius: 4px 18px 18px 18px;
  background: var(--panel);
  border: 1px solid var(--line);
  box-shadow: var(--shadow-soft);
  line-height: 1.62;
}

.bubble p { margin: 0 0 .7rem; }
.bubble p:last-child { margin-bottom: 0; }
.hint, .review-note, .mode-note { color: var(--muted); font-size: .8rem; }

.answer-feedback {
  margin-top: .65rem;
  padding-top: .55rem;
  border-top: 1px solid color-mix(in srgb, var(--line) 68%, transparent);
  text-align: right;
}
.answer-feedback-button {
  border: 0;
  padding: .25rem 0;
  background: transparent;
  color: var(--muted);
  font: inherit;
  font-size: .72rem;
  cursor: pointer;
}
.answer-feedback-button:hover { color: var(--accent); text-decoration: underline; text-underline-offset: .2em; }

.source-list {
  margin-top: 1rem;
  padding-top: .9rem;
  border-top: 1px solid var(--line);
}

.source-card {
  padding: .2rem 0 .85rem;
}

.source-card + .source-card {
  margin-top: .75rem;
  padding-top: .9rem;
  border-top: 1px solid color-mix(in srgb, var(--line) 72%, transparent);
}
.reference-list {
  margin-top: 1rem;
  border-top: 1px solid var(--line);
}
.reference-list summary {
  padding: .8rem 0;
  color: var(--accent);
  cursor: pointer;
}
.reference-boundary {
  color: var(--muted);
  font-size: .78rem;
}

.source-card strong {
  display: block;
  font-family: var(--font-book);
  font-weight: 700;
}

.source-meta { margin-top: .18rem; color: var(--muted); font-size: .82rem; }

.actions { display: flex; flex-wrap: wrap; gap: .45rem; margin-top: .9rem; }
.source-actions { margin-top: .55rem; }
.more-results-actions { margin-top: .75rem; }

.action {
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: .5rem .75rem;
  background: transparent;
  color: var(--accent);
  font: inherit;
  font-size: .78rem;
  cursor: pointer;
}

.action:hover { background: var(--accent-soft); border-color: var(--line-strong); }

.excerpt {
  display: none;
  margin-top: .8rem;
  padding: .9rem;
  border-left: 3px solid var(--line-strong);
  background: var(--accent-soft);
  color: var(--ink);
  font-family: var(--font-book);
  font-size: .9rem;
  white-space: pre-wrap;
}

.excerpt.open { display: block; }

.composer {
  position: fixed;
  left: 50%;
  bottom: 0;
  transform: translateX(-50%);
  width: min(880px, 100%);
  padding: .8rem 1.5rem 1.25rem;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: .65rem;
  background: linear-gradient(transparent, var(--paper) 20%);
  z-index: 4;
}

textarea {
  width: 100%;
  min-height: 3.15rem;
  max-height: 9rem;
  resize: none;
  padding: .9rem 1rem;
  border: 1px solid var(--line-strong);
  border-radius: 18px;
  outline: none;
  background: var(--panel);
  color: var(--ink);
  font: inherit;
  line-height: 1.35;
  box-shadow: var(--shadow);
}

textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 18%, transparent), var(--shadow);
}

#send {
  align-self: start;
  min-height: 3.15rem;
  display: flex;
  align-items: center;
  gap: .4rem;
  padding: 0 1rem;
  border: 0;
  border-radius: 16px;
  background: var(--accent);
  color: var(--on-accent);
  font: inherit;
  cursor: pointer;
}

#send:disabled { opacity: .48; cursor: wait; }
.mode-note { grid-column: 1 / -1; margin: -.25rem 0 0 .25rem; }

.typing { display: inline-flex; gap: .25rem; padding: .25rem; }
.typing i { width: .42rem; height: .42rem; border-radius: 50%; background: var(--muted); animation: pulse 1s infinite ease-in-out; }
.typing i:nth-child(2) { animation-delay: .15s; }
.typing i:nth-child(3) { animation-delay: .3s; }

dialog {
  width: min(820px, 94vw);
  max-height: 92vh;
  padding: 1rem;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: var(--panel);
  box-shadow: var(--shadow);
}

dialog::backdrop { background: color-mix(in srgb, var(--ink) 58%, transparent); backdrop-filter: blur(3px); }
dialog img { display: block; max-width: 100%; margin: 1rem auto 0; border: 1px solid var(--line); }
.dialog-heading h2 { margin: 0; font-family: var(--font-book); }
.dialog-heading p { margin: .25rem 0 0; color: var(--muted); }
.close { float: right; border: 0; background: transparent; font-size: 1.8rem; cursor: pointer; }
.page-navigation {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: .7rem;
  margin-top: 1rem;
  padding: .7rem;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--paper);
}
.page-buttons { display: flex; justify-content: center; flex-wrap: wrap; gap: .35rem; }
.page-number, .page-step {
  border: 1px solid var(--line);
  border-radius: 999px;
  min-height: 2.35rem;
  padding: .35rem .7rem;
  background: var(--panel);
  color: var(--accent);
  font: inherit;
  font-size: .8rem;
  cursor: pointer;
}
.page-number { min-width: 2.35rem; padding-inline: .5rem; }
.page-number.active { border-color: var(--accent); background: var(--accent); color: var(--on-accent); }
.page-step:disabled { opacity: .4; cursor: default; }
.page-status { min-height: 1.25rem; margin: .8rem 0 0; color: var(--muted); font-size: .82rem; text-align: center; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0, 0, 0, 0); }

.auth-shell {
  width: min(520px, 100%);
  min-height: 100vh;
  min-height: 100dvh;
  margin: 0 auto;
  padding: clamp(2rem, 8vh, 5.5rem) 1rem 2rem;
}

.auth-brand { margin-bottom: 1.4rem; text-align: center; }
.auth-brand h1 { white-space: normal; font-size: clamp(1.75rem, 7vw, 2.35rem); }
.auth-brand p { color: var(--muted); }
.edition-label {
  margin: 0 0 .65rem;
  color: var(--muted);
  font-size: .72rem;
  letter-spacing: .13em;
  text-transform: uppercase;
}

.auth-card {
  padding: 1.35rem;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: var(--panel);
  box-shadow: var(--shadow);
}
.auth-card h2 { margin: 0 0 .4rem; }
.auth-intro { margin: 0 0 1.1rem; color: var(--muted); line-height: 1.55; }
.form-stack { display: grid; gap: .65rem; }
.form-stack label { margin-top: .25rem; color: var(--muted); font-size: .8rem; }
.form-stack input {
  width: 100%;
  min-height: 3rem;
  padding: .75rem .85rem;
  border: 1px solid var(--line-strong);
  border-radius: 12px;
  outline: none;
  background: var(--paper);
  color: var(--ink);
  font: inherit;
}
.form-stack select {
  width: 100%;
  min-height: 3rem;
  padding: .7rem .85rem;
  border: 1px solid var(--line-strong);
  border-radius: 12px;
  background: var(--paper);
  color: var(--ink);
  font: inherit;
}
.form-stack input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 18%, transparent);
}
.primary-button {
  min-height: 3rem;
  margin-top: .55rem;
  border: 0;
  border-radius: 12px;
  background: var(--accent);
  color: var(--on-accent);
  font: inherit;
  cursor: pointer;
}
.primary-button:disabled,
.form-stack input:disabled {
  cursor: not-allowed;
  opacity: .5;
}
.reset-invalid {
  padding: 1rem;
  border: 1px solid var(--line-strong);
  border-radius: 12px;
  background: var(--paper);
}
.reset-invalid h3 { margin: 0 0 .45rem; font-size: 1rem; }
.reset-invalid p { margin: 0 0 1rem; color: var(--muted); line-height: 1.55; }
.primary-link {
  display: inline-block;
  padding: .75rem 1rem;
  border-radius: 12px;
  background: var(--accent);
  color: var(--on-accent);
  text-decoration: none;
}
.primary-link:focus-visible { outline: 3px solid var(--line-strong); outline-offset: 3px; }
.text-button {
  margin-top: 1rem;
  padding: .2rem 0;
  border: 0;
  background: transparent;
  color: var(--accent);
  font: inherit;
  font-size: .82rem;
  cursor: pointer;
  text-decoration: underline;
  text-underline-offset: .2em;
}
.secondary-link { display: block; margin-top: .55rem; }
.consent-row {
  display: flex;
  align-items: flex-start;
  gap: .65rem;
  line-height: 1.5;
  cursor: pointer;
}
.form-stack .consent-row input {
  width: 1.15rem;
  min-height: 1.15rem;
  margin: .15rem 0 0;
  flex: 0 0 1.15rem;
  accent-color: var(--accent);
}
.consent-row span { color: var(--muted); }
.form-status { min-height: 1.4rem; margin: 1rem 0 0; color: var(--accent); font-size: .82rem; }
.dev-reset { margin: .6rem 0 0; font-size: .8rem; }
.dev-reset a { color: var(--accent); }
.privacy-note { margin: 1rem 0 0; font-size: .76rem; }
.privacy-note a { color: var(--accent); text-underline-offset: .2em; }

.feedback-dialog { width: min(560px, 94vw); }
.feedback-dialog .form-stack { margin-top: 1rem; }
.feedback-dialog textarea { min-height: 8rem; border-radius: 12px; box-shadow: none; }
.feedback-actions { display: flex; justify-content: flex-end; gap: .55rem; margin-top: .35rem; }
.feedback-actions .action, .feedback-actions .primary-button { min-height: 2.75rem; margin: 0; padding-inline: 1rem; }

@keyframes appear { from { opacity: 0; transform: translateY(5px); } }
@keyframes pulse { 0%, 70%, 100% { opacity: .3; transform: translateY(0); } 35% { opacity: 1; transform: translateY(-3px); } }

@media (max-width: 620px) {
  .topbar {
    position: static;
    align-items: stretch;
    flex-direction: column;
    gap: .85rem;
    padding: 1rem;
  }
  .topbar-controls {
    align-items: stretch;
    flex-wrap: wrap;
    gap: .5rem;
    width: 100%;
  }
  .language-select { flex: 0 0 auto; }
  .header-action { align-self: center; }
  .coverage {
    flex: 1 1 100%;
    border-radius: 14px;
    line-height: 1.4;
    overflow-wrap: anywhere;
    white-space: normal;
  }
  .messages { padding: 2rem 1rem calc(8.5rem + env(safe-area-inset-bottom)); }
  .composer {
    inset-inline: 0;
    left: 0;
    bottom: 0;
    transform: none;
    width: 100%;
    padding: .65rem 1rem calc(.75rem + env(safe-area-inset-bottom));
  }
  #send span:first-child { display: none; }
  .message.assistant .bubble, .message.user .bubble { max-width: calc(100vw - 4.3rem); }
  .page-navigation { grid-template-columns: 1fr 1fr; }
  .page-buttons { grid-column: 1 / -1; grid-row: 1; }
  .page-step { grid-row: 2; }
  .page-step span { display: none; }
}