:root {
  --green: #7cb899;
  --green-light: #a8d5b9;
  --green-dark: #5a9a7a;
  --bg: #0d1117;
  --surface: #161b22;
  --card: #1c2333;
  --card-hover: #212d3f;
  --border: #30363d;
  --text: #e6edf3;
  --subtext: #8b949e;
  --tag-bg: #1f2d1f;
  --sidebar-w: 260px;
  --danger: #f87171;
  --danger-bg: #2b0d0d;
  --icon-filter: invert(1);
}

[data-theme="light"] {
  --bg: #f6f8fa;
  --surface: #ffffff;
  --card: #eef1f4;
  --card-hover: #e4e9ef;
  --border: #d0d7de;
  --text: #1f2328;
  --subtext: #656d76;
  --tag-bg: #ddf4e4;
  --danger: #cf222e;
  --danger-bg: #ffebe9;
  --icon-filter: invert(0);
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
}

body.loading #app, body.loading #auth-overlay { opacity: 0; }

/* ── AUTH ── */
#auth-overlay {
  position: fixed; inset: 0;
  background: var(--bg);
  display: flex; align-items: center; justify-content: center;
  z-index: 1000;
  transition: opacity 0.3s;
}

#auth-overlay.hidden { display: none; }

.auth-box {
  width: 360px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 32px;
}

.auth-logo {
  display: flex; align-items: center; gap: 12px;
  margin-bottom: 24px;
}

.auth-title { font-size: 18px; font-weight: 700; }
.auth-sub { font-size: 12px; color: var(--subtext); }

#auth-tabs {
  display: flex; gap: 4px;
  background: var(--card);
  border-radius: 8px;
  padding: 4px;
  margin-bottom: 20px;
}

.auth-form { display: flex; flex-direction: column; gap: 10px; }
.auth-form input {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text);
  font-size: 14px;
  padding: 9px 12px;
  outline: none;
  transition: border-color 0.2s;
}
.auth-form input:focus { border-color: var(--green); }

.form-error { font-size: 12px; color: var(--danger); min-height: 16px; }

/* ── LAYOUT ── */
#app {
  display: flex;
  min-height: 100vh;
  transition: opacity 0.3s;
}

#app.hidden { display: none; }

/* ── SIDEBAR ── */
#sidebar {
  width: var(--sidebar-w);
  background: var(--surface);
  border-right: 1px solid var(--border);
  position: fixed;
  top: 0; left: 0; bottom: 0;
  overflow-y: auto;
  z-index: 50;
  display: flex;
  flex-direction: column;
}

.sidebar-logo {
  padding: 20px 16px 14px;
  border-bottom: 1px solid var(--border);
  display: flex; align-items: center; gap: 10px;
}

.s6-icon {
  width: 34px; height: 34px;
  background: var(--green);
  border-radius: 8px;
  display: flex; align-items: center; justify-content: center;
  font-weight: 800; font-size: 14px; color: #fff;
  flex-shrink: 0;
}

.sidebar-title { font-size: 14px; font-weight: 700; }
.sidebar-sub { font-size: 10px; color: var(--subtext); text-transform: uppercase; letter-spacing: 0.06em; }

#search-wrap { padding: 10px 12px; border-bottom: 1px solid var(--border); }
#search {
  width: 100%; background: var(--card); border: 1px solid var(--border);
  border-radius: 6px; color: var(--text); font-size: 13px;
  padding: 6px 10px; outline: none; transition: border-color 0.2s;
}
#search:focus { border-color: var(--green); }
#search::placeholder { color: var(--subtext); }

#nav-tree { flex: 1; padding: 8px 0; overflow-y: auto; }

.nav-category {
  padding: 6px 12px 2px;
  font-size: 10px; font-weight: 700;
  text-transform: uppercase; letter-spacing: 0.1em;
  color: var(--subtext);
  display: flex; align-items: center; justify-content: space-between;
}

.nav-link {
  display: flex; align-items: center;
  padding: 6px 12px;
  font-size: 13px;
  color: var(--subtext);
  border-left: 2px solid transparent;
  cursor: pointer;
  transition: all 0.12s;
  text-decoration: none;
  user-select: none;
}
.nav-link:hover { color: var(--text); background: rgba(124,184,153,0.06); }
.nav-link.active { color: var(--green); border-left-color: var(--green); background: rgba(124,184,153,0.08); font-weight: 500; }
.nav-link.subpage { padding-left: 26px; font-size: 12px; }
.nav-link.hypatia { color: var(--green-light); margin-top: 4px; }

.nav-loading { padding: 16px 12px; font-size: 13px; color: var(--subtext); }

.sidebar-footer {
  padding: 10px 16px;
  border-top: 1px solid var(--border);
  margin-top: auto;
}

.sidebar-wordmark {
  font-size: 10px; color: var(--subtext); letter-spacing: 0.08em;
  font-weight: 600; text-transform: uppercase; opacity: 0.6;
}

.user-role-badge {
  font-size: 10px; padding: 1px 6px; border-radius: 4px;
  background: var(--tag-bg); color: var(--green-light); border: 1px solid var(--green-dark);
  font-weight: 600; text-transform: uppercase; letter-spacing: 0.04em;
}

/* ── TOPBAR ── */
#topbar {
  position: fixed;
  top: 0; left: var(--sidebar-w); right: 0;
  height: 40px;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  display: flex; align-items: center; justify-content: flex-end;
  gap: 6px; padding: 0 16px;
  font-size: 12px; color: var(--subtext);
  z-index: 40;
  white-space: nowrap;
}

/* ── MAIN ── */
#main {
  margin-left: var(--sidebar-w);
  flex: 1;
  min-height: 100vh;
  padding: 80px 48px 80px;
  max-width: calc(100vw - var(--sidebar-w));
}

/* ── PAGE VIEW ── */
#page-header {
  display: flex; align-items: center; justify-content: space-between;
  margin-bottom: 28px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--border);
}

#page-breadcrumb { font-size: 13px; color: var(--subtext); }
#page-breadcrumb span { color: var(--text); }

#page-actions { display: flex; gap: 8px; }

/* ── HISTORY PANEL ── */
#history-panel {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 16px 20px;
  margin-bottom: 24px;
}
.history-title {
  font-size: 13px; font-weight: 700;
  display: flex; justify-content: space-between; align-items: center;
  margin-bottom: 12px;
}
.history-item {
  display: flex; align-items: center; gap: 12px;
  padding: 8px 0;
  border-bottom: 1px solid var(--border);
  font-size: 13px;
}
.history-item:last-child { border-bottom: none; }
.history-ts { color: var(--subtext); font-size: 12px; min-width: 140px; }
.history-editor { color: var(--green-light); }

/* ── MARKDOWN BODY ── */
.markdown-body { font-size: 15px; line-height: 1.75; max-width: 800px; }
.markdown-body h1 { font-size: 28px; font-weight: 800; margin: 0 0 20px; letter-spacing: -0.02em; }
.markdown-body h2 { font-size: 20px; font-weight: 700; margin: 36px 0 12px; padding-bottom: 8px; border-bottom: 1px solid var(--border); }
.markdown-body h3 { font-size: 16px; font-weight: 700; margin: 24px 0 8px; color: var(--green-light); }
.markdown-body p { margin-bottom: 14px; color: var(--subtext); }
.markdown-body a { color: var(--green); text-decoration: none; }
.markdown-body a:hover { text-decoration: underline; }
.markdown-body ul, .markdown-body ol { padding-left: 22px; margin-bottom: 14px; }
.markdown-body li { margin-bottom: 4px; color: var(--subtext); }
.markdown-body strong { color: var(--text); font-weight: 700; }
.markdown-body em { color: var(--green-light); }
.markdown-body code {
  background: var(--card); border: 1px solid var(--border);
  border-radius: 4px; padding: 2px 6px; font-size: 13px; font-family: monospace;
}
.markdown-body pre {
  background: var(--card); border: 1px solid var(--border);
  border-radius: 8px; padding: 16px; overflow-x: auto; margin-bottom: 14px;
}
.markdown-body pre code { background: none; border: none; padding: 0; }
.markdown-body blockquote {
  border-left: 3px solid var(--green); padding: 8px 16px;
  background: rgba(124,184,153,0.05); border-radius: 0 6px 6px 0;
  margin: 0 0 14px; color: var(--text); font-style: italic;
}
.markdown-body img { max-width: 100%; border-radius: 8px; margin: 8px 0; border: 1px solid var(--border); }
.markdown-body video { max-width: 100%; border-radius: 8px; margin: 8px 0; }
.markdown-body table { width: 100%; border-collapse: collapse; margin-bottom: 14px; font-size: 14px; }
.markdown-body th { background: var(--card); border-bottom: 2px solid var(--green-dark); padding: 8px 12px; text-align: left; color: var(--green-light); font-size: 12px; text-transform: uppercase; letter-spacing: 0.06em; }
.markdown-body td { padding: 9px 12px; border-bottom: 1px solid var(--border); color: var(--subtext); }
.markdown-body hr { border: none; border-top: 1px solid var(--border); margin: 24px 0; }

/* ── COMMENTS ── */
#comments-section {
  margin-top: 48px;
  max-width: 800px;
  border-top: 1px solid var(--border);
  padding-top: 28px;
}
.comments-title { font-size: 14px; font-weight: 700; margin-bottom: 16px; color: var(--subtext); }
.comment-item {
  background: var(--card); border: 1px solid var(--border);
  border-radius: 8px; padding: 14px 16px; margin-bottom: 10px;
}
.comment-meta { display: flex; align-items: center; gap: 10px; margin-bottom: 6px; }
.comment-author { font-size: 13px; font-weight: 700; color: var(--green-light); }
.comment-date { font-size: 11px; color: var(--subtext); }
.comment-del { margin-left: auto; font-size: 11px; color: var(--subtext); cursor: pointer; }
.comment-del:hover { color: var(--danger); }
.comment-text { font-size: 13.5px; color: var(--subtext); line-height: 1.6; white-space: pre-wrap; }
#comment-form { display: flex; flex-direction: column; gap: 8px; margin-top: 16px; }
#comment-input {
  background: var(--card); border: 1px solid var(--border); border-radius: 6px;
  color: var(--text); font-size: 13.5px; padding: 10px 12px; resize: vertical; outline: none;
  font-family: inherit; transition: border-color 0.2s;
}
#comment-input:focus { border-color: var(--green); }

/* ── EDIT VIEW ── */
#edit-header {
  display: flex; align-items: center; justify-content: space-between;
  margin-bottom: 20px; padding-bottom: 14px; border-bottom: 1px solid var(--border);
}
#edit-actions { display: flex; gap: 8px; }
#editor-wrap { display: flex; gap: 16px; height: calc(100vh - 180px); }
#editor-pane, #preview-pane { flex: 1; display: flex; flex-direction: column; }
.pane-label { font-size: 11px; text-transform: uppercase; letter-spacing: 0.08em; color: var(--subtext); font-weight: 700; margin-bottom: 8px; }
#editor {
  flex: 1; background: var(--card); border: 1px solid var(--border);
  border-radius: 8px; color: var(--text); font-family: 'SF Mono', 'Fira Code', monospace;
  font-size: 13.5px; line-height: 1.65; padding: 16px; resize: none; outline: none;
  transition: border-color 0.2s;
}
#editor:focus { border-color: var(--green); }
#editor-preview {
  flex: 1; overflow-y: auto; background: var(--card);
  border: 1px solid var(--border); border-radius: 8px; padding: 16px;
}

/* ── HYPATIA ── */
#hypatia-view { max-width: 800px; }
.hypatia-header { margin-bottom: 28px; }
.hypatia-title { font-size: 28px; font-weight: 800; margin-bottom: 4px; }
.hypatia-sub { font-size: 15px; color: var(--subtext); margin-bottom: 12px; }
#chat-messages {
  background: var(--card); border: 1px solid var(--border); border-radius: 10px;
  padding: 20px; min-height: 400px; max-height: 60vh; overflow-y: auto;
  margin-bottom: 16px; display: flex; flex-direction: column; gap: 16px;
}
.chat-msg { display: flex; gap: 10px; }
.chat-msg.user { flex-direction: row-reverse; }
.chat-avatar {
  width: 30px; height: 30px; border-radius: 8px;
  display: flex; align-items: center; justify-content: center;
  font-size: 13px; font-weight: 700; flex-shrink: 0;
}
.chat-msg.user .chat-avatar { background: var(--green-dark); color: #fff; }
.chat-msg.assistant .chat-avatar { background: rgba(124,184,153,0.15); color: var(--green-light); border: 1px solid var(--green-dark); }
.chat-bubble {
  max-width: 80%; padding: 10px 14px; border-radius: 8px; font-size: 14px; line-height: 1.65;
}
.chat-msg.user .chat-bubble { background: rgba(124,184,153,0.12); border: 1px solid rgba(124,184,153,0.2); color: var(--text); }
.chat-msg.assistant .chat-bubble { background: var(--surface); border: 1px solid var(--border); color: var(--subtext); }
.chat-msg.assistant .chat-bubble p { margin-bottom: 8px; }
.chat-msg.assistant .chat-bubble p:last-child { margin-bottom: 0; }
.chat-thinking { color: var(--subtext); font-style: italic; }
#chat-form { display: flex; gap: 8px; align-items: flex-end; }
#chat-input {
  flex: 1; background: var(--card); border: 1px solid var(--border); border-radius: 8px;
  color: var(--text); font-size: 14px; padding: 10px 14px; resize: none; outline: none;
  font-family: inherit; transition: border-color 0.2s;
}
#chat-input:focus { border-color: var(--green); }

/* ── ADMIN ── */
#admin-view { max-width: 900px; }
.admin-tabs { display: flex; gap: 4px; background: var(--card); border-radius: 8px; padding: 4px; margin: 16px 0 24px; width: fit-content; }
.admin-tab-content.hidden { display: none; }
.admin-section-title { font-size: 12px; font-weight: 700; text-transform: uppercase; letter-spacing: 0.08em; color: var(--subtext); margin-bottom: 12px; }
.user-row {
  display: flex; align-items: center; gap: 12px;
  background: var(--card); border: 1px solid var(--border);
  border-radius: 8px 8px 0 0; border-bottom: none;
  padding: 12px 16px; font-size: 13px;
}
.user-row:has(+ .user-edit-panel.hidden) { border-radius: 8px; border-bottom: 1px solid var(--border); }
.user-row .uname { font-weight: 700; }
.user-row .udisp { color: var(--subtext); flex: 1; }
.user-row .urole-badge { font-size: 10px; padding: 1px 6px; border-radius: 4px; background: var(--tag-bg); color: var(--green-light); border: 1px solid var(--green-dark); text-transform: uppercase; font-weight: 600; letter-spacing: 0.04em; }
.user-row select { background: var(--card); border: 1px solid var(--border); color: var(--text); border-radius: 4px; padding: 4px 8px; font-size: 12px; }

.user-edit-panel {
  background: var(--surface); border: 1px solid var(--border); border-top: none;
  border-radius: 0 0 8px 8px; padding: 16px; margin-bottom: 8px;
}
.user-edit-panel.hidden { display: none; }
.user-edit-grid {
  display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 12px;
}
.user-edit-grid label { display: flex; flex-direction: column; gap: 4px; font-size: 12px; color: var(--subtext); font-weight: 600; text-transform: uppercase; letter-spacing: 0.06em; }
.user-edit-grid input, .user-edit-grid select { background: var(--card); border: 1px solid var(--border); color: var(--text); border-radius: 6px; padding: 6px 10px; font-size: 13px; }

.model-section-header { display:flex; align-items:center; justify-content:space-between; margin-bottom:12px; }
.model-hint { font-size:11px; color:var(--subtext); font-weight:400; text-transform:none; letter-spacing:0; margin-left:6px; }
.model-card {
  background: var(--card); border: 1px solid var(--border); border-radius: 8px;
  padding: 14px 16px; margin-bottom: 8px;
}
.model-card-row { display:flex; gap:12px; align-items:flex-end; margin-bottom:10px; }
.model-card-row:last-child { margin-bottom:0; }
.mc-label { display:flex; flex-direction:column; gap:4px; font-size:11px; font-weight:600; text-transform:uppercase; letter-spacing:0.06em; color:var(--subtext); flex:1; }
.mc-label input, .mc-label select { background:var(--surface); border:1px solid var(--border); color:var(--text); border-radius:6px; padding:6px 10px; font-size:13px; font-weight:400; text-transform:none; letter-spacing:0; }

.inline-form { display: flex; gap: 8px; align-items: center; }
.inline-form.col { flex-direction: column; align-items: flex-start; max-width: 400px; }
.inline-form input, .inline-form select {
  background: var(--card); border: 1px solid var(--border); border-radius: 6px;
  color: var(--text); font-size: 13px; padding: 7px 10px; outline: none; flex: 1;
}
.inline-form.col input, .inline-form.col select { width: 100%; }
.inline-form input:focus, .inline-form select:focus { border-color: var(--green); }

.col-form { display: flex; flex-direction: column; gap: 10px; max-width: 500px; }
.col-form label { display: flex; flex-direction: column; gap: 4px; font-size: 13px; color: var(--subtext); }
.col-form input, .col-form textarea {
  background: var(--card); border: 1px solid var(--border); border-radius: 6px;
  color: var(--text); font-size: 13.5px; padding: 8px 12px; outline: none;
  font-family: inherit; resize: vertical;
}
.col-form input:focus, .col-form textarea:focus { border-color: var(--green); }

/* ── BUTTONS ── */
.btn-primary {
  background: var(--green); color: #fff; border: none;
  border-radius: 6px; padding: 8px 16px; font-size: 13px; font-weight: 600;
  cursor: pointer; transition: all 0.15s; white-space: nowrap;
}
.btn-primary:hover { background: var(--green-dark); }
.btn-primary:disabled { opacity: 0.5; cursor: not-allowed; }

.btn-ghost {
  background: transparent; color: var(--subtext);
  border: 1px solid var(--border); border-radius: 6px;
  padding: 7px 14px; font-size: 13px; cursor: pointer; transition: all 0.15s; white-space: nowrap;
}
.btn-ghost:hover { color: var(--text); border-color: var(--subtext); }

.btn-danger {
  background: var(--danger-bg); color: var(--danger);
  border: 1px solid #991b1b; border-radius: 6px;
  padding: 5px 10px; font-size: 12px; cursor: pointer; transition: all 0.15s;
}
.btn-danger:hover { background: #3b0e0e; }

.btn-approve {
  background: var(--tag-bg); color: var(--green-light);
  border: 1px solid var(--green-dark); border-radius: 6px;
  padding: 5px 10px; font-size: 12px; cursor: pointer; transition: all 0.15s;
}
.btn-approve:hover { background: rgba(124,184,153,0.2); }

.icon-btn {
  background: transparent; border: none; color: var(--subtext);
  font-size: 16px; cursor: pointer; padding: 4px 6px; border-radius: 4px;
  transition: all 0.15s; line-height: 1; text-decoration: none;
  display: inline-flex; align-items: center;
}
.icon-btn:hover { color: var(--text); background: rgba(255,255,255,0.05); }
.icon-btn img, .btn-ghost img { opacity: 0.55; filter: var(--icon-filter); vertical-align: middle; }
.icon-btn:hover img, .btn-ghost:hover img { opacity: 0.9; }

.close-btn {
  background: transparent; border: none; color: var(--subtext);
  font-size: 14px; cursor: pointer; padding: 2px 6px; border-radius: 4px;
}
.close-btn:hover { color: var(--text); }

.tab {
  flex: 1; background: transparent; border: none; color: var(--subtext);
  padding: 6px 12px; border-radius: 5px; font-size: 13px; cursor: pointer; transition: all 0.12s;
}
.tab.active { background: var(--surface); color: var(--text); font-weight: 600; }
.tab:hover:not(.active) { color: var(--text); }
.tab.admin-tab.active { color: #5b9cf6; }
.tab.admin-tab:hover:not(.active) { color: #5b9cf6; }
.tab.sa-tab { color: #a78bfa; }
.tab.sa-tab:hover { color: #c4b5fd; background: rgba(167,139,250,0.08); }
.tab.sa-tab.active { background: var(--surface); color: #a78bfa; font-weight: 600; }
.tab-divider { width: 1px; background: var(--border); margin: 4px 2px; align-self: stretch; }

.section-header { padding-bottom: 16px; border-bottom: 1px solid var(--border); margin-bottom: 24px; display: flex; align-items: center; justify-content: space-between; }
.section-header h2 { font-size: 22px; font-weight: 700; }

.hidden { display: none !important; }

.form-hint {
  font-size: 11px;
  color: var(--green-light);
  margin-top: -4px;
  min-height: 14px;
}

/* ── MODAL ── */
.modal-overlay {
  position: fixed; inset: 0;
  background: rgba(0,0,0,0.6);
  display: flex; align-items: center; justify-content: center;
  z-index: 200;
}
.modal-box {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 28px 32px;
  width: 380px;
}
.modal-title {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 12px;
}

@media (max-width: 780px) {
  #editor-wrap { flex-direction: column; height: auto; }
  #editor { min-height: 300px; }
  #main { padding: 20px 20px 60px; }
}