/* ── Variables ─────────────────────────────────────────────────────────────── */
:root {
  --bg:        #1e1e2e;
  --surface:   #313244;
  --surface2:  #45475a;
  --border:    #585b70;
  --text:      #cdd6f4;
  --muted:     #a6adc8;
  --primary:   #cba6f7;
  --danger:    #f38ba8;
  --success:   #a6e3a1;

  --persona-0: #cba6f7;
  --persona-1: #89b4fa;
  --persona-2: #a6e3a1;
  --persona-3: #f9e2af;
  --persona-4: #fab387;
  --persona-5: #f38ba8;
}

/* ── Reset ─────────────────────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html, body { height: 100%; }
body {
  font-family: system-ui, -apple-system, sans-serif;
  font-size: 14px;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
}
input, textarea, select, button { font: inherit; color: inherit; }
button { cursor: pointer; border: none; background: none; }
textarea { resize: vertical; }

/* ── Auth overlay ──────────────────────────────────────────────────────────── */
.auth-overlay {
  position: fixed; inset: 0;
  background: var(--bg);
  display: flex; align-items: center; justify-content: center;
  z-index: 100;
}
.auth-overlay.hidden { display: none; }
.auth-modal {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 2rem;
  width: 100%;
  max-width: 380px;
}
.auth-modal h2 { text-align: center; font-size: 1.4rem; margin-bottom: .25rem; }
.auth-subtitle { text-align: center; color: var(--muted); font-size: .85rem; margin-bottom: 1.25rem; }
.auth-tabs { display: flex; gap: .5rem; margin-bottom: 1.25rem; }
.auth-tab {
  flex: 1; padding: .5rem; border-radius: 6px;
  background: transparent; color: var(--muted);
  border: 1px solid var(--border);
  transition: all .15s;
}
.auth-tab.active { background: var(--primary); color: var(--bg); border-color: var(--primary); }
.auth-form.hidden { display: none; }
.form-group { display: flex; flex-direction: column; gap: .3rem; margin-bottom: .9rem; }
.form-group label { font-size: .8rem; color: var(--muted); font-weight: 500; }
.form-group input, .form-group textarea, .form-group select {
  background: var(--bg); border: 1px solid var(--border); border-radius: 6px;
  padding: .5rem .75rem; color: var(--text);
  transition: border-color .15s;
}
.form-group input:focus, .form-group textarea:focus, .form-group select:focus {
  outline: none; border-color: var(--primary);
}
.form-row { display: flex; gap: .75rem; }
.input-suffix { display: flex; align-items: center; gap: .5rem; }
.input-suffix input { flex: 1; }
.input-suffix span { color: var(--muted); white-space: nowrap; }
.field-hint { font-size: .75rem; color: var(--muted); }
.optional { color: var(--muted); font-weight: normal; }
.auth-error { color: var(--danger); font-size: .8rem; min-height: 1rem; }

/* ── Buttons ───────────────────────────────────────────────────────────────── */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  padding: .5rem 1rem; border-radius: 6px;
  font-weight: 500; transition: all .15s; white-space: nowrap;
}
.btn-primary { background: var(--primary); color: var(--bg); }
.btn-primary:hover { filter: brightness(1.1); }
.btn-ghost { border: 1px solid var(--border); color: var(--muted); }
.btn-ghost:hover { border-color: var(--text); color: var(--text); }
.btn-sm { padding: .3rem .6rem; font-size: .8rem; }
.btn-danger { color: var(--danger) !important; }
.btn-danger:hover { border-color: var(--danger) !important; }
.btn-full { width: 100%; }
.btn:disabled { opacity: .5; cursor: not-allowed; }
.close-btn {
  background: none; border: none; font-size: 1.4rem; color: var(--muted);
  line-height: 1; padding: 0 .25rem;
}
.close-btn:hover { color: var(--text); }
.btn-icon {
  background: none; border: 1px solid var(--border); border-radius: 4px;
  padding: .2rem .4rem; font-size: .8rem; color: var(--muted);
}
.btn-icon:hover { border-color: var(--text); color: var(--text); }
.btn-signout {
  font-size: .8rem; color: var(--muted); padding: .25rem .5rem;
  border: 1px solid var(--border); border-radius: 5px;
}
.btn-signout:hover { color: var(--text); }

/* ── App layout ─────────────────────────────────────────────────────────────── */
.app { display: flex; flex-direction: column; height: 100vh; }
.app.hidden { display: none; }
.header {
  background: var(--surface); border-bottom: 1px solid var(--border);
  padding: .75rem 1.5rem; flex-shrink: 0;
}
.header-inner { display: flex; align-items: center; justify-content: space-between; }
.header-logo { font-size: 1.1rem; font-weight: 700; color: var(--primary); }
.header-right { display: flex; align-items: center; gap: .75rem; }
.header-username { color: var(--muted); font-size: .85rem; }
.view { flex: 1; overflow-y: auto; padding: 1.5rem; }
.view.hidden { display: none; }

/* ── Groups view ────────────────────────────────────────────────────────────── */
.view-toolbar {
  display: flex; align-items: center; justify-content: space-between;
  margin-bottom: 1.25rem;
}
.view-toolbar h2 { font-size: 1.1rem; }
.groups-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1rem;
}
.group-card {
  background: var(--surface); border: 1px solid var(--border); border-radius: 10px;
  padding: 1rem; display: flex; flex-direction: column; gap: .6rem;
}
.group-card-top { display: flex; align-items: flex-start; justify-content: space-between; gap: .5rem; }
.group-card-name { font-size: 1rem; font-weight: 600; }
.model-badge {
  font-size: .7rem; background: var(--surface2); color: var(--muted);
  padding: .2rem .5rem; border-radius: 20px; white-space: nowrap; flex-shrink: 0;
}
.group-card-meta { display: flex; gap: 1rem; color: var(--muted); font-size: .8rem; }
.group-card-actions { display: flex; gap: .5rem; flex-wrap: wrap; }
.empty-state { text-align: center; color: var(--muted); padding: 3rem; }

/* ── Modals ─────────────────────────────────────────────────────────────────── */
.modal-overlay {
  position: fixed; inset: 0; background: rgba(0,0,0,.6);
  display: flex; align-items: center; justify-content: center;
  z-index: 50; padding: 1rem;
}
.modal-overlay.hidden { display: none; }
.modal {
  background: var(--surface); border: 1px solid var(--border); border-radius: 12px;
  width: 100%; max-width: 560px; max-height: 90vh;
  display: flex; flex-direction: column;
}
.modal-sm { max-width: 420px; }
.modal-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 1rem 1.25rem; border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}
.modal-header h3 { font-size: 1rem; }
.modal-body { padding: 1.25rem; overflow-y: auto; flex: 1; }
.modal-footer {
  display: flex; justify-content: flex-end; gap: .75rem;
  padding: 1rem 1.25rem; border-top: 1px solid var(--border);
  flex-shrink: 0;
}

/* ── Personas editor ────────────────────────────────────────────────────────── */
.personas-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: .5rem; }
.personas-header label { font-size: .8rem; color: var(--muted); font-weight: 500; }
.personas-list { display: flex; flex-direction: column; gap: .75rem; }
.persona-row {
  background: var(--bg); border: 1px solid var(--border); border-radius: 8px;
  padding: .75rem; display: flex; gap: .5rem; align-items: flex-start;
}
.persona-row-fields { display: flex; flex-direction: column; gap: .4rem; flex: 1; }
.persona-name {
  background: var(--surface); border: 1px solid var(--border); border-radius: 5px;
  padding: .35rem .6rem; font-weight: 600;
}
.persona-prompt {
  background: var(--surface); border: 1px solid var(--border); border-radius: 5px;
  padding: .35rem .6rem; font-size: .85rem; min-height: 52px;
}
.persona-name:focus, .persona-prompt:focus { outline: none; border-color: var(--primary); }
.persona-row-controls { display: flex; flex-direction: column; gap: .25rem; padding-top: .1rem; }

/* ── Discussion view ────────────────────────────────────────────────────────── */
.discussion-header {
  display: flex; align-items: center; gap: 1rem;
  padding: .75rem 1.25rem; background: var(--surface);
  border-bottom: 1px solid var(--border); flex-shrink: 0;
}
.discussion-header-center { flex: 1; min-width: 0; }
.discussion-header-center h2 { font-size: 1rem; }
.discussion-header-right { flex-shrink: 0; }
.persona-badges { display: flex; flex-wrap: wrap; gap: .4rem; margin-top: .3rem; }
.persona-badge {
  font-size: .75rem; padding: .2rem .55rem; border-radius: 20px;
  border: 1px solid; font-weight: 500;
}
.persona-badge[data-persona-index="0"] { color: var(--persona-0); border-color: var(--persona-0); }
.persona-badge[data-persona-index="1"] { color: var(--persona-1); border-color: var(--persona-1); }
.persona-badge[data-persona-index="2"] { color: var(--persona-2); border-color: var(--persona-2); }
.persona-badge[data-persona-index="3"] { color: var(--persona-3); border-color: var(--persona-3); }
.persona-badge[data-persona-index="4"] { color: var(--persona-4); border-color: var(--persona-4); }
.persona-badge[data-persona-index="5"] { color: var(--persona-5); border-color: var(--persona-5); }

#discussion-view {
  display: flex; flex-direction: column; height: calc(100vh - 57px);
}
#discussion-view.hidden { display: none; }
.feed {
  flex: 1; overflow-y: auto; padding: 1.25rem;
  display: flex; flex-direction: column; gap: .75rem;
}

/* ── Feed elements ──────────────────────────────────────────────────────────── */
.topic-banner {
  text-align: center; color: var(--muted); font-size: .85rem;
  padding: .6rem 1rem; border: 1px dashed var(--border); border-radius: 8px;
}
.topic-label {
  display: inline-block; background: var(--surface2); border-radius: 4px;
  padding: 0 .4rem; font-size: .75rem; margin-right: .4rem; color: var(--text);
}

.turn-bubble {
  background: var(--surface); border-radius: 10px;
  border-left: 3px solid;
  padding: .75rem 1rem; max-width: 820px;
}
.turn-bubble[data-persona-index="0"] { border-color: var(--persona-0); }
.turn-bubble[data-persona-index="1"] { border-color: var(--persona-1); }
.turn-bubble[data-persona-index="2"] { border-color: var(--persona-2); }
.turn-bubble[data-persona-index="3"] { border-color: var(--persona-3); }
.turn-bubble[data-persona-index="4"] { border-color: var(--persona-4); }
.turn-bubble[data-persona-index="5"] { border-color: var(--persona-5); }
.bubble-header {
  font-size: .78rem; font-weight: 700; margin-bottom: .4rem;
  text-transform: uppercase; letter-spacing: .04em;
}
.turn-bubble[data-persona-index="0"] .bubble-header { color: var(--persona-0); }
.turn-bubble[data-persona-index="1"] .bubble-header { color: var(--persona-1); }
.turn-bubble[data-persona-index="2"] .bubble-header { color: var(--persona-2); }
.turn-bubble[data-persona-index="3"] .bubble-header { color: var(--persona-3); }
.turn-bubble[data-persona-index="4"] .bubble-header { color: var(--persona-4); }
.turn-bubble[data-persona-index="5"] .bubble-header { color: var(--persona-5); }
.bubble-body { white-space: pre-wrap; line-height: 1.65; }
.turn-bubble.streaming .bubble-body::after {
  content: '▋'; animation: blink .7s step-end infinite;
  display: inline-block; margin-left: 1px;
}
@keyframes blink { 0%,100% { opacity: 1; } 50% { opacity: 0; } }

.summary-banner {
  background: var(--surface2); border: 1px solid var(--border); border-radius: 10px;
  padding: 1rem; font-style: italic;
}
.summary-label {
  font-style: normal; font-weight: 700; font-size: .75rem;
  text-transform: uppercase; letter-spacing: .05em;
  color: var(--primary); margin-bottom: .5rem;
}
.summary-text { color: var(--muted); line-height: 1.65; white-space: pre-wrap; }
.summarizing-msg { color: var(--muted); font-size: .85rem; text-align: center; }
.feed-msg { font-size: .85rem; text-align: center; }
.welcome-msg { color: var(--muted); padding: 2rem 0; }
.error-msg { color: var(--danger); }

/* ── Question footer ────────────────────────────────────────────────────────── */
.question-footer {
  display: flex; gap: .75rem; align-items: flex-end;
  padding: .75rem 1.25rem; background: var(--surface);
  border-top: 1px solid var(--border); flex-shrink: 0;
}
#question-input {
  flex: 1; background: var(--bg); border: 1px solid var(--border); border-radius: 8px;
  padding: .5rem .75rem; max-height: 120px;
}
#question-input:focus { outline: none; border-color: var(--primary); }
#question-input:disabled { opacity: .5; }