/* === TOKENS — DARK (default) === */
:root {
  --bg:          #16171B;
  --surface:     #1E2026;
  --elevated:    #2A2B30;
  --deepgreen:   #052E16;
  --amber-bg:    #2D1B00;
  --text:        #F4F4F5;
  --text-sec:    #71717A;
  --text-muted:  #52525B;
  --text-ph:     #3F3F46;
  --green:       #22C55E;
  --amber:       #F59E0B;
  --border:      #2A2B30;
  --r:           4px;
  --font:        'Space Grotesk', system-ui, sans-serif;
  --mono:        'Roboto Mono', monospace;
  /* sidebar stays dark in both themes */
  --sb-bg:       #16171B;
  --sb-border:   #2A2B30;
  --sb-accent:   #22C55E;
  --sb-text:     #71717A;
  --sb-btn-bg:   #22C55E;
  --sb-btn-text: #16171B;
}

/* === TOKENS — LIGHT === */
[data-theme="light"] {
  --bg:          #F8FAFC;
  --surface:     #FFFFFF;
  --elevated:    #E2E8F0;
  --deepgreen:   #DCFCE7;
  --amber-bg:    #FEF3C7;
  --text:        #0F172A;
  --text-sec:    #475569;
  --text-muted:  #64748B;
  --text-ph:     #94A3B8;
  --green:       #16A34A;
  --amber:       #D97706;
  --border:      #E2E8F0;
  --r:           4px;
  /* sidebar stays dark */
  --sb-bg:       #0F172A;
  --sb-border:   #1E293B;
  --sb-accent:   #2563EB;
  --sb-text:     #94A3B8;
  --sb-btn-bg:   #2563EB;
  --sb-btn-text: #FFFFFF;
}

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

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  font-size: 14px;
}

/* ── LAYOUT ───────────────────────────────────────────────────────────────── */
.app { display: flex; height: 100vh; overflow: hidden; }

/* ── SIDEBAR ──────────────────────────────────────────────────────────────── */
.sidebar {
  width: 220px;
  background: var(--sb-bg);
  border-right: 1px solid var(--sb-border);
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
}

.logo-area {
  height: 56px;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 0 20px;
  border-bottom: 1px solid var(--sb-border);
  flex-shrink: 0;
}

.logo-area svg { color: var(--sb-accent); width: 20px; height: 20px; flex-shrink: 0; }

.logo-text {
  font-size: 13px;
  font-weight: 700;
  color: #F4F4F5;
  letter-spacing: -0.3px;
}

.nav-area {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: 8px;
  overflow-y: auto;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 8px;
  height: 34px;
  padding: 0 12px;
  border-radius: var(--r);
  cursor: pointer;
  color: var(--sb-text);
  font-size: 12px;
  font-weight: 400;
  transition: background 0.15s, color 0.15s;
  border-left: 2px solid transparent;
}

.nav-item svg { width: 16px; height: 16px; color: var(--sb-text); flex-shrink: 0; transition: color 0.15s; }
.nav-item:hover { background: rgba(255,255,255,0.05); color: #F4F4F5; }
.nav-item:hover svg { color: #94A3B8; }

.nav-item.active {
  background: rgba(255,255,255,0.07);
  color: var(--sb-accent);
  font-weight: 600;
  border-left-color: var(--sb-accent);
}
.nav-item.active svg { color: var(--sb-accent); }

.bottom-area {
  padding: 12px;
  border-top: 1px solid var(--sb-border);
  display: flex;
  flex-direction: column;
  gap: 8px;
  flex-shrink: 0;
}

/* Project Selector */
.proj-selector-wrap { position: relative; width: 100%; height: 34px; }

.proj-selector-display {
  position: absolute; inset: 0;
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 10px;
  background: rgba(255,255,255,0.05);
  border: 1px solid var(--sb-border);
  border-radius: var(--r);
  pointer-events: none;
}

.proj-selector-display span {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--sb-text);
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}

.proj-selector-display svg { width: 14px; height: 14px; color: var(--sb-text); flex-shrink: 0; }

.proj-selector-native {
  position: absolute; inset: 0;
  opacity: 0; cursor: pointer; width: 100%; height: 100%;
}

.btn-new-proj {
  display: flex; align-items: center; justify-content: center; gap: 6px;
  width: 100%; height: 32px;
  background: var(--sb-btn-bg); border: none; border-radius: var(--r);
  cursor: pointer;
  font-family: var(--mono); font-size: 11px; font-weight: 700; color: var(--sb-btn-text);
  transition: opacity 0.15s;
}
.btn-new-proj:hover { opacity: 0.88; }
.btn-new-proj svg { width: 14px; height: 14px; color: var(--sb-btn-text); }

/* ── THEME TOGGLE ─────────────────────────────────────────────────────────── */
.theme-toggle {
  display: flex; align-items: center; justify-content: center;
  width: 32px; height: 32px; border-radius: var(--r);
  background: transparent; border: 1px solid var(--border);
  cursor: pointer; color: var(--text-muted); transition: all 0.15s;
}
.theme-toggle:hover { border-color: var(--green); color: var(--green); }
.theme-toggle svg { width: 16px; height: 16px; }

/* ── MAIN ─────────────────────────────────────────────────────────────────── */
.main { flex: 1; display: flex; flex-direction: column; overflow: hidden; }

/* ── TOPBAR ───────────────────────────────────────────────────────────────── */
.topbar {
  height: 52px;
  background: var(--bg);
  border-bottom: 1px solid var(--border);
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 24px;
  flex-shrink: 0;
}

.topbar-title { font-size: 16px; font-weight: 700; letter-spacing: -0.5px; }

.topbar-right { display: flex; align-items: center; gap: 12px; }
.topbar-bell { width: 18px; height: 18px; color: var(--text-muted); }
.topbar-avatar {
  width: 32px; height: 32px; border-radius: 50%;
  background: var(--surface); border: 1px solid var(--border);
}

/* ── CONTENT ──────────────────────────────────────────────────────────────── */
.content { flex: 1; overflow-y: auto; padding: 24px; }

.tab-content { display: none; }
.tab-content.active { display: block; }

/* ── EMPTY STATE ──────────────────────────────────────────────────────────── */
.empty-state {
  display: flex; align-items: center; justify-content: center;
  padding: 64px; color: var(--text-muted); font-size: 13px;
}

/* ── STAT CARDS ───────────────────────────────────────────────────────────── */
.stat-row { display: flex; gap: 16px; margin-bottom: 20px; }

.stat-card {
  flex: 1;
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--r);
  padding: 16px 20px; display: flex; flex-direction: column; gap: 6px;
}

.stat-label { font-family: var(--mono); font-size: 11px; font-weight: 600; color: var(--text-muted); }
.stat-value { font-size: 22px; font-weight: 700; letter-spacing: -0.3px; color: var(--text); }
.stat-value.green { color: var(--green); }
.stat-value.amber { color: var(--amber); }
.stat-sub { font-family: var(--mono); font-size: 10px; color: var(--text-muted); }

/* ── CARDS ────────────────────────────────────────────────────────────────── */
.card {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--r);
  margin-bottom: 16px; overflow: hidden;
}

.card-header {
  height: 44px; padding: 0 16px;
  display: flex; align-items: center; justify-content: space-between;
  border-bottom: 1px solid var(--border);
}

.card-title { font-size: 13px; font-weight: 700; color: var(--text); }
.card-body { padding: 16px; }

/* ── TABLES ───────────────────────────────────────────────────────────────── */
.tbl-wrap { overflow-x: auto; }

table { width: 100%; border-collapse: collapse; }

thead tr { height: 32px; background: var(--bg); }
thead th {
  font-family: var(--mono); font-size: 10px; font-weight: 700; color: var(--text-muted);
  padding: 0 12px; text-align: left; white-space: nowrap;
  border-top: 1px solid var(--border); border-bottom: 1px solid var(--border);
}
thead th.right { text-align: right; }
thead th.center { text-align: center; }

tbody td {
  padding: 0 12px; height: 38px; vertical-align: middle;
  border-bottom: 1px solid rgba(42,43,48,0.7);
}

.td-name  { font-family: var(--font); font-size: 12px; color: var(--text-sec); }
.td-mono  { font-family: var(--mono); font-size: 11px; color: var(--text-muted); }
.td-val   { font-family: var(--mono); font-size: 11px; color: var(--text); text-align: right; }
.td-bold  { font-family: var(--mono); font-size: 11px; font-weight: 700; color: var(--green); text-align: right; }
.td-amber { font-family: var(--mono); font-size: 11px; font-weight: 700; color: var(--amber); text-align: right; }
.td-center { text-align: center; }

/* ── BADGES ───────────────────────────────────────────────────────────────── */
.badge {
  display: inline-flex; align-items: center;
  height: 20px; padding: 0 8px; border-radius: 2px;
  font-family: var(--mono); font-weight: 700; font-size: 10px;
}
.badge-green { background: var(--deepgreen); color: var(--green); }
.badge-amber { background: var(--amber-bg); color: var(--amber); }

/* ── FORMS ────────────────────────────────────────────────────────────────── */
.form-grid   { display: grid; gap: 12px; }
.form-grid-3 { grid-template-columns: repeat(3, 1fr); }
.form-grid-2 { grid-template-columns: repeat(2, 1fr); }
.form-full   { grid-column: 1 / -1; }

.field { display: flex; flex-direction: column; gap: 6px; }

.field-label {
  font-family: var(--mono); font-size: 10px; font-weight: 700;
  color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.05em;
}

input, select, textarea {
  background: var(--bg); border: 1px solid var(--border); color: var(--text);
  padding: 0 10px; height: 34px; border-radius: var(--r);
  font-family: var(--mono); font-size: 11px; width: 100%;
  transition: border-color 0.15s;
}
input::placeholder, textarea::placeholder { color: var(--text-ph); }
input:focus, select:focus, textarea:focus { outline: none; border-color: var(--green); }
textarea { height: 56px; padding: 10px; resize: none; }

/* ── BUTTONS ──────────────────────────────────────────────────────────────── */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  height: 34px; padding: 0 16px; border-radius: var(--r); border: none;
  cursor: pointer; font-family: var(--font); font-size: 13px; font-weight: 700;
  transition: opacity 0.15s;
}
.btn svg { width: 14px; height: 14px; }
.btn-primary { background: var(--green); color: var(--bg); }
.btn-primary:hover { opacity: 0.88; }
.btn-secondary {
  background: var(--surface); color: var(--text-sec); border: 1px solid var(--border);
  font-family: var(--mono); font-size: 11px; font-weight: 400; height: 32px;
}
.btn-secondary:hover { border-color: var(--green); color: var(--green); }
.btn-secondary svg { color: var(--green); }

/* ── TOOLBAR ──────────────────────────────────────────────────────────────── */
.toolbar { display: flex; align-items: center; gap: 12px; height: 36px; margin-bottom: 16px; }

/* ── UPLOAD ───────────────────────────────────────────────────────────────── */
.upload-wrap {
  display: flex; align-items: center; justify-content: center;
  padding: 24px;
}

.upload-card { width: 480px; }

.upload-zone {
  margin: 16px;
  background: var(--bg); border: 2px solid var(--green); border-radius: var(--r);
  padding: 32px; display: flex; flex-direction: column; align-items: center;
  justify-content: center; gap: 16px; cursor: pointer; transition: opacity 0.15s;
}
.upload-zone:hover { opacity: 0.8; }
.upload-zone.drag { opacity: 0.7; }
.upload-zone svg { width: 48px; height: 48px; color: var(--green); }
.upload-zone-text { font-size: 13px; font-weight: 600; color: var(--text-sec); text-align: center; }
.upload-zone-sub { font-family: var(--mono); font-size: 10px; color: var(--text-muted); }

/* ── CHAPTER CARDS ────────────────────────────────────────────────────────── */
.chapter-card {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--r);
  margin-bottom: 12px; overflow: hidden;
}

.chapter-header {
  height: 44px; padding: 0 16px;
  display: flex; align-items: center; justify-content: space-between;
  cursor: pointer; border-bottom: 1px solid var(--border); transition: background 0.1s;
}
.chapter-header:hover { background: rgba(34,197,94,0.04); }

.ch-left { display: flex; align-items: center; gap: 8px; }

.ch-chevron svg { width: 14px; height: 14px; color: var(--green); }
.ch-chevron.collapsed svg { color: var(--text-muted); }

.ch-title { font-size: 13px; font-weight: 700; color: var(--text); }
.ch-value { font-family: var(--mono); font-size: 13px; font-weight: 700; color: var(--green); }

.chapter-body { overflow: hidden; }
.chapter-body.hidden { display: none; }

/* ── PROGRESS BARS ────────────────────────────────────────────────────────── */
.progress-row {
  padding-bottom: 8px; border-bottom: 1px solid var(--border);
  margin-bottom: 12px; display: flex; flex-direction: column; gap: 6px;
}
.progress-row:last-child { border-bottom: none; margin-bottom: 0; padding-bottom: 0; }

.progress-row-top { display: flex; justify-content: space-between; align-items: center; }
.progress-row-name { font-size: 12px; color: var(--text-sec); }
.progress-row-val { font-family: var(--mono); font-size: 11px; font-weight: 700; }
.progress-row-val.green { color: var(--green); }
.progress-row-val.amber { color: var(--amber); }

.progress-track { height: 6px; background: var(--elevated); border-radius: 2px; overflow: hidden; }
.progress-fill { height: 100%; border-radius: 2px; transition: width 0.3s; }
.progress-fill.green { background: var(--green); }
.progress-fill.amber { background: var(--amber); }

/* ── CHAT ─────────────────────────────────────────────────────────────────── */
.chat-container { display: flex; flex-direction: column; height: calc(100vh - 52px); }

.chat-messages {
  flex: 1; overflow-y: auto; padding: 20px;
  display: flex; flex-direction: column; gap: 16px;
}

.msg-row { display: flex; gap: 10px; }
.msg-row.user { justify-content: flex-end; }

.ai-avatar {
  width: 32px; height: 32px; border-radius: var(--r);
  background: var(--deepgreen); border: 1px solid var(--green);
  display: flex; align-items: center; justify-content: center; flex-shrink: 0;
}
.ai-avatar svg { width: 16px; height: 16px; color: var(--green); }

.ai-bubble {
  max-width: 520px;
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--r);
  padding: 12px 16px; font-size: 13px; color: var(--text-sec); line-height: 1.5;
  white-space: pre-wrap;
}

.ai-bubble.streaming::after {
  content: '';
  display: inline-block; width: 8px; height: 14px;
  background: var(--green); border-radius: 1px; margin-left: 4px;
  vertical-align: middle; animation: blink 1s infinite;
}

.user-bubble {
  max-width: 360px;
  background: var(--deepgreen); border: 1px solid var(--green); border-radius: var(--r);
  padding: 12px 16px; font-size: 13px; color: var(--text); line-height: 1.5;
}

@keyframes blink { 0%, 100% { opacity: 1; } 50% { opacity: 0; } }

.chat-input-area {
  height: 60px; background: var(--bg); border-top: 1px solid var(--border);
  display: flex; align-items: center; gap: 12px; padding: 10px 16px; flex-shrink: 0;
}

#chatInput {
  flex: 1 !important; height: 38px !important; width: auto !important;
  background: var(--surface) !important; border-color: var(--green) !important;
  font-family: var(--mono) !important; font-size: 12px !important;
  resize: none; line-height: 38px; padding: 0 12px !important;
}

.chat-send-btn {
  width: 80px; height: 36px; flex-shrink: 0;
  background: var(--green); border: none; border-radius: var(--r);
  font-family: var(--font); font-size: 13px; font-weight: 700; color: var(--bg);
  cursor: pointer; transition: opacity 0.15s;
}
.chat-send-btn:hover { opacity: 0.88; }

/* ── PRICE GUIDE ──────────────────────────────────────────────────────────── */
.pg-count-chip {
  display: inline-flex; align-items: center;
  height: 22px; padding: 0 10px;
  background: var(--deepgreen); border: 1px solid var(--green); border-radius: var(--r);
  font-family: var(--mono); font-size: 11px; font-weight: 700; color: var(--green);
}

.pg-grid {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 8px; padding: 16px;
}

.pg-tile {
  height: 44px; background: var(--bg); border: 1px solid var(--border);
  border-radius: var(--r); padding: 0 14px;
  display: flex; align-items: center; justify-content: space-between; gap: 8px;
}

.pg-tile-name {
  font-size: 12px; color: var(--text-sec);
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap; flex: 1;
}

.pg-tile-price {
  font-family: var(--mono); font-size: 13px; font-weight: 700; color: var(--green);
  white-space: nowrap; flex-shrink: 0;
}

/* ── TOAST ────────────────────────────────────────────────────────────────── */
.toast {
  position: fixed; bottom: 20px; right: 20px;
  background: var(--surface); border: 1px solid var(--border);
  border-left: 3px solid var(--green);
  padding: 12px 16px; border-radius: var(--r);
  font-size: 13px; z-index: 999; animation: slide-in 0.2s ease; color: var(--text);
}

@keyframes slide-in { from { transform: translateX(100%); opacity: 0; } to { transform: translateX(0); opacity: 1; } }