@font-face {
  font-family: "PT Serif";
  src: url("./fonts/PTSerif-BoldItalic.woff2") format("woff2"),
    url("./fonts/PTSerif-BoldItalic.woff") format("woff");
  font-weight: bold;
  font-style: italic;
  font-display: swap;
}
@font-face {
  font-family: "PT Serif";
  src: url("./fonts/PTSerif-Bold.woff2") format("woff2"),
    url("./fonts/PTSerif-Bold.woff") format("woff");
  font-weight: bold;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: "PT Serif";
  src: url("./fonts/PTSerif-Italic.woff2") format("woff2"),
    url("./fonts/PTSerif-Italic.woff") format("woff");
  font-weight: normal;
  font-style: italic;
  font-display: swap;
}
@font-face {
  font-family: "PT Serif";
  src: url("./fonts/PTSerif-Regular.woff2") format("woff2"),
    url("./fonts/PTSerif-Regular.woff") format("woff");
  font-weight: normal;
  font-style: normal;
  font-display: swap;
}

:root {
  --bg: #000;
  --text: #eee;
  --text-subtle: #aaa;
  --text-dim: #ccc;
  --user-color: #9900FC;
  --assistant-color: #00FF00;
  --accent: gold;
  --border-dim: #444;
  --border-hover: #666;
  --border-active: #999;
  --surface-raised: #1a1a1a;
  --surface-code: #2a2a2a;
  --surface-popup: #333;
  --font-main: "PT Serif";
  --font-mono: monospace;
  --font-size-base: 24px;
  --font-size-sm: 16px;
  --font-size-xs: 14px;
  --font-size-btn: 18px;
  --link: #fff;
  --link-hover-bg: #fff;
  --link-hover-text: #000;
}

html {
  box-sizing: border-box;
}
body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-main);
  font-size: var(--font-size-base);
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  margin: 0;
  padding: calc(20px + var(--brand-logo-height, 50px) + 20px) 20px 20px;
}
a {
  color: var(--link);
  font-family: var(--font-mono);
  font-size: 1rem;
  padding: 0.25rem;
  transition: all 0.333s;
}
a:hover {
  background-color: var(--link-hover-bg);
  color: var(--link-hover-text);
  text-decoration: none;
}
code {
  word-break: break-word !important;
  word-wrap: break-word;
  white-space: break-spaces;
}
details {
  padding: 5px;
}
details div {
  padding: 15px;
  font-style: italic;
  font-size: var(--font-size-sm);
  color: var(--text-dim);
}
summary {
  cursor: pointer;
  font-weight: bold;
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: var(--font-size-sm);
}

#chat {
  display: flex;
  flex-direction: column;
}
#chat div {
  max-width: 32em;
}
#chat:first-child {
  margin-top: 4rem;
}
#chat-container {
  width: 100%;
  max-width: 95vw;
  display: flex;
  flex-direction: column;
}
#text-input {
  width: 100%;
  max-width: 32em;
  background: var(--bg);
  color: var(--text);
  border: 1px dotted transparent;
  padding: 10px;
  outline: none;
  resize: none;
  overflow-y: hidden;
  min-height: 40px;
  font-family: var(--font-main);
  font-size: var(--font-size-base);
}
#submit-button {
  background: var(--bg);
  color: var(--text);
  border-width: 1px;
  padding: 10px 20px;
  font-family: var(--font-main);
  cursor: pointer;
  border-color: transparent;
  border-style: dotted;
  width: fit-content;
  margin-top: 2rem;
  font-size: var(--font-size-base);
}
#submit-button:hover {
  border-style: ridge;
  border-color: var(--border-hover);
}
#submit-button:active {
  border-style: inset;
  border-color: var(--border-active);
}
#user-input {
  display: flex;
  flex-direction: column;
  align-items: self-end;
  margin-top: 4rem;
}

.loading {
  font-style: italic;
  color: var(--text-subtle);
}
.hidden {
  display: none !important;
}
.user {
  margin-top: 2rem;
  align-self: end;
}
.user span:first-child {
  color: var(--user-color);
}
.assistant .mr1 {
  color: var(--assistant-color);
}
.assistant div span p:first-child {
  margin-top: 0;
}
.bot-message {
  align-self: self-start;
}
.message {
  white-space: pre-wrap;
  margin: 10px 0;
  display: flex;
  align-items: baseline;
}

.message.assistant {
  align-items: flex-start;
}
.bot-message {
  padding: 25px;
  border-radius: 5px;
}
.loading-indicator {
  font-style: italic;
  margin: 1rem 0;
}
.mr1 {
  margin-right: 1rem;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(-4px); }
  to   { opacity: 1; transform: none; }
}
.emoji-popup {
  position: absolute;
  background: var(--surface-popup);
  color: var(--text);
  padding: 8px 12px;
  border-radius: 4px;
  font-size: var(--font-size-xs);
  z-index: 1000;
  max-width: 300px;
  box-shadow: 0 2px 10px rgba(0,0,0,0.2);
  white-space: normal;
  word-wrap: break-word;
  animation: fadeIn 0.15s ease;
}
.tool-emojis {
  border-bottom: 1px solid var(--border-dim);
  padding-bottom: 6px;
  margin-bottom: 6px;
}
.tool-emojis span {
  cursor: pointer;
  position: relative;
  margin-right: 5px;
}

/* Minimal responsive design */
@media (min-width: 768px) {
  #chat-container {
    max-width: 80vw;
  }
}
@media (min-width: 1440px) {
  #chat-container {
    max-width: 69vw;
  }
}

#files-container {
    width: 100%;
    height: calc(100vh - 80px);
    margin-top: 4rem;
}

#history-container {
    width: 100%;
    max-width: 95vw;
    padding: 20px;
}

#files-frame {
    width: 100%;
    height: 100%;
    border: none;
    background: var(--bg);
    color: var(--text);
}

#session-controls {
    position: fixed;
    top: 20px;
    left: 20px;
    display: flex;
    justify-content: space-between;
    width: 90vw;
    gap: 10px;
    z-index: 100;
}

#history-button,
#new-session-button,
#files-button {
    background: var(--bg);
    color: var(--text);
    border: 1px dotted transparent;
    padding: 8px 16px;
    font-family: var(--font-main);
    cursor: pointer;
    font-size: var(--font-size-btn);
    text-decoration: none;
}

#history-button:hover,
#new-session-button:hover,
#files-button:hover {
    border-style: ridge;
    border-color: var(--border-hover);
}

#history-button:active,
#new-session-button:active,
#files-button:active {
    border-style: inset;
    border-color: var(--border-active);
}

.session-item {
    cursor: pointer;
    padding: 12px;
    border-bottom: 1px solid var(--border-dim);
    display: flex;
    align-items: center;
    gap: 12px;
}
.session-item:hover { background: var(--surface-raised); }
.session-info { flex: 1; min-width: 0; }
.session-prompt { color: var(--text); }
.session-item:hover .session-prompt { color: var(--bg); }
.session-date { color: var(--text-subtle); font-size: var(--font-size-xs); }
.session-delete-btn {
    flex-shrink: 0;
    background: none;
    border: 1px solid transparent;
    color: #c0392b;
    cursor: pointer;
    font-size: var(--font-size-sm);
    padding: 4px 8px;
    border-radius: 4px;
    opacity: 0;
    transition: opacity 0.15s ease, background 0.15s ease, border-color 0.15s ease;
}
.session-item:hover .session-delete-btn {
    opacity: 1;
}
.session-delete-btn:hover {
    background: #c0392b;
    border-color: #c0392b;
    color: #fff;
}

.thinking-summary {
    cursor: pointer;
    font-size: var(--font-size-xs);
    color: var(--assistant-color);
    font-family: var(--font-main);
    font-style: italic;
    padding: 4px 0;
    transition: color 0.2s ease, opacity 0.2s ease;
    list-style: none;
    position: relative;
    opacity: 0.6;
}

.thinking-summary:hover {
    opacity: 1;
}

.thinking-summary::before {
    content: "▶";
    color: var(--assistant-color);
    margin-right: 6px;
    transition: transform 0.2s ease;
    font-size: 12px;
}

.thinking-details[open] .thinking-summary::before {
    transform: rotate(90deg);
}

.thinking-content {
    margin-top: 8px;
    padding: 12px;
    background: var(--surface-raised);
    border-radius: 6px;
    font-size: var(--font-size-sm);
    color: var(--text-dim);
    border-left: 3px solid var(--assistant-color);
    font-style: italic;
    line-height: 1.4;
    opacity: 0.8;
}

.thinking-content p {
    margin: 0 0 8px 0;
}

.thinking-content p:last-child {
    margin-bottom: 0;
}

.thinking-content code {
    background: var(--surface-code);
    padding: 2px 4px;
    border-radius: 3px;
    font-size: var(--font-size-xs);
}

.thinking-content pre {
    background: var(--surface-code);
    padding: 8px;
    border-radius: 4px;
    overflow-x: auto;
    margin: 8px 0;
}

.thinking-content ul, .thinking-content ol {
    margin: 8px 0;
    padding-left: 20px;
}

#indexer-status {
    font-family: var(--font-mono);
    font-size: 13px;
    color: var(--text-subtle);
    padding: 8px 10px;
    transition: color 0.3s ease;
}
#indexer-status.status-loading  { color: var(--text-subtle); font-style: italic; }
#indexer-status.status-ready    { color: var(--text-subtle); }
#indexer-status.status-indexing { color: #f0c040; }
#indexer-status.status-warning  { color: #ff6666; }
#indexer-status.status-offline  { color: #ff6666; font-style: italic; }

.source-citation {
    font-size: 0.75em;
    color: #88aacc;
    padding: 1px 4px;
    border: 1px solid #335;
    border-radius: 3px;
    text-decoration: none;
    white-space: nowrap;
}
.source-citation:hover {
    background-color: #88aacc;
    color: black;
    border-color: #88aacc;
}

#file-viewer {
    position: fixed; inset: 0;
    background: var(--bg);
    z-index: 500;
    display: flex; flex-direction: column;
}
#file-viewer.hidden { display: none; }
#file-viewer-header {
    display: flex; align-items: center; justify-content: space-between;
    padding: 8px 16px;
    border-bottom: 1px solid var(--border-dim);
    font-family: var(--font-mono); font-size: var(--font-size-sm);
}
#file-viewer-name { color: var(--text); }
#file-viewer-close {
    background: none; border: none; color: var(--text); cursor: pointer;
    font-size: var(--font-size-base);
}
#file-viewer-frame { flex: 1; border: none; width: 100%; }

/* === Live streaming rendering === */
@keyframes blink-cursor {
    0%, 100% { opacity: 1; }
    50%       { opacity: 0; }
}
.streaming-cursor {
    display: inline-block;
    width: 0.5ch;
    height: 1em;
    background-color: var(--assistant-color);
    vertical-align: text-bottom;
    margin-left: 1px;
    animation: blink-cursor 0.85s step-start infinite;
}
.streaming-pending {
    opacity: 0.75;
    white-space: pre-wrap;
}
.streaming-committed {
    white-space: normal;
}
@keyframes thinking-dots {
    0%  { content: ""; }
    25% { content: "."; }
    50% { content: ".."; }
    75% { content: "..."; }
}
.streaming-thinking-indicator {
    font-style: italic;
    color: var(--assistant-color);
    font-size: var(--font-size-sm);
    opacity: 0.6;
}
.streaming-thinking-content {
    margin-top: 6px;
    padding: 10px 12px;
    background: var(--surface-raised);
    border-left: 3px solid var(--assistant-color);
    border-radius: 4px;
    font-size: var(--font-size-xs);
    font-style: italic;
    color: var(--text-dim);
    white-space: pre-wrap;
    max-height: 180px;
    overflow-y: auto;
    opacity: 0.7;
    line-height: 1.4;
}
.streaming-thinking-indicator::after {
    content: "";
    animation: thinking-dots 1.2s step-start infinite;
}