/* ══════════════════════════════════════════════════════
   阿福 AFU — AI 协作管家
   全屏三列工作台 · 黑金克制 · ChatGPT 式沉浸对话
   ══════════════════════════════════════════════════════ */

:root {
  --bg:           #080808;
  --bg-sidebar:   #0F0F0F;
  --bg-chat:      #0C0C0C;
  --bg-user:      #1A1A1A;
  --text:         #EAE7E0;
  --text-soft:    #96928A;
  --text-dim:     #5C5852;
  --gold:         #B99858;
  --gold-light:   #D0B06B;
  --gold-dim:     #7A693E;
  --border:       rgba(255,255,255,0.09);
  --border-gold:  rgba(185,152,88,0.38);
  --border-focus: rgba(185,152,88,0.55);
  --radius-sm:    8px;
  --radius:       12px;
  --radius-lg:    18px;
  --transition:   180ms ease;
  --msg-max-w:    860px;
}

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

/* ═══════════════════════════════════════════════════════
   Root — full viewport, no scroll on body
   ═══════════════════════════════════════════════════════ */
html, body {
  width: 100vw;
  height: 100vh;
  margin: 0;
  overflow: hidden;
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "Segoe UI",
    "PingFang SC", "Microsoft YaHei", "Noto Sans SC", system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

body {
  display: flex;
  flex-direction: column;
}
}

/* ═══════════════════════════════════════════════════════
   Global Topbar — full width across all columns
   ═══════════════════════════════════════════════════════ */
.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0 24px;
  height: 48px;
  flex-shrink: 0;
  border-bottom: 1px solid var(--border);
  background: var(--bg);
  z-index: 10;
}

.topbar-left { display: flex; align-items: center; gap: 10px; }
.topbar-brand { display: flex; align-items: baseline; gap: 8px; }
.topbar-name {
  font-size: 0.92rem; font-weight: 600; color: var(--text); letter-spacing: 0.03em;
}
.topbar-subtitle { font-size: 0.68rem; color: var(--text-dim); font-weight: 400; }
.topbar-status { display: flex; align-items: center; gap: 6px; margin-left: 8px; padding-left: 12px; border-left: 1px solid var(--border); }
.status-dot { width: 6px; height: 6px; border-radius: 50%; background: var(--gold); box-shadow: 0 0 6px rgba(185,152,88,0.35); }
.status-text { font-size: 0.66rem; color: var(--text-dim); }
.topbar-right { display: flex; align-items: center; gap: 10px; }

.btn-outline {
  display: inline-flex; align-items: center; gap: 6px; padding: 5px 12px;
  border: 1px solid var(--border); border-radius: var(--radius-sm);
  background: transparent; color: var(--text-soft); font-size: 0.72rem;
  font-family: inherit; cursor: pointer; transition: all var(--transition); white-space: nowrap;
}
.btn-outline:hover { border-color: var(--border-gold); color: var(--text); background: rgba(185,152,88,0.04); }

.btn-accent {
  display: inline-flex; align-items: center; gap: 6px; padding: 5px 12px;
  border: 1px solid var(--border-gold); border-radius: var(--radius-sm);
  background: rgba(185,152,88,0.08); color: var(--gold-light); font-size: 0.72rem;
  font-family: inherit; cursor: pointer; transition: all var(--transition); white-space: nowrap;
}
.btn-accent:hover { background: rgba(185,152,88,0.15); border-color: var(--border-focus); }

/* ═══════════════════════════════════════════════════════
   Three-Column Body — CSS Grid, fills remaining height
   ┌──────────────┬───────────────────────────┬──────────┐
   │ 契约 20%     │      主对话区 70%          │ 导航 10% │
   └──────────────┴───────────────────────────┴──────────┘
   ═══════════════════════════════════════════════════════ */
.app-body {
  flex: 1;
  min-height: 0;
  display: grid;
  grid-template-columns: minmax(220px, 20%) minmax(0, 1fr) minmax(100px, 10%);
  overflow: hidden;
}

/* ═══════════════════════════════════════════════════════
   Left: Contract Sidebar ~20%
   ═══════════════════════════════════════════════════════ */
.contract-sidebar {
  display: flex;
  flex-direction: column;
  border-right: 1px solid var(--border);
  background: var(--bg-sidebar);
  overflow: hidden;
  min-width: 0;
}

.contract-header {
  display: flex; align-items: center;
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}

.contract-header-title {
  font-size: 0.72rem; font-weight: 500; color: var(--text-dim);
  letter-spacing: 0.05em;
}

.contract-body { flex: 1; overflow-y: auto; min-height: 0; }

.contract-empty {
  display: flex; align-items: center; justify-content: center;
  height: 100%; padding: 2rem 1rem; text-align: center;
}
.contract-empty-text { font-size: 0.7rem; color: var(--text-dim); line-height: 1.7; }

.contract-card { padding: 16px; display: flex; flex-direction: column; gap: 12px; }

.cc-section { display: flex; flex-direction: column; gap: 3px; }
.cc-label {
  font-size: 0.6rem; font-weight: 600; color: var(--text-dim);
  text-transform: uppercase; letter-spacing: 0.06em; margin-bottom: 1px;
}
.cc-value { font-size: 0.76rem; color: var(--text); line-height: 1.5; }
.cc-goal { font-size: 0.82rem; font-weight: 500; color: var(--gold-light); }
.cc-meta { font-size: 0.7rem; color: var(--text-soft); }

.cc-list { list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; gap: 2px; }
.cc-list li { font-size: 0.72rem; color: var(--text-soft); line-height: 1.5; padding: 2px 0; }
.cc-list li::before { content: "·"; color: var(--text-dim); margin-right: 6px; font-weight: bold; }
.cc-list-check li::before { content: "☐"; color: var(--gold-dim); }
.cc-list-warn li::before { content: "⚠"; color: var(--gold); }

.cc-scope-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
.cc-scope-tag { font-size: 0.58rem; font-weight: 600; color: var(--text-dim); text-transform: uppercase; letter-spacing: 0.04em; margin-bottom: 3px; }
.cc-scope-tag-out { color: var(--gold-dim); }

.cc-confidence { padding: 8px 0; border-top: 1px solid var(--border); }
.cc-confidence-label { display: flex; justify-content: space-between; align-items: center; margin-bottom: 4px; font-size: 0.66rem; color: var(--text-dim); }
.cc-confidence-pct { font-size: 0.7rem; font-weight: 600; color: var(--gold-light); }
.cc-confidence-bar { width: 100%; height: 3px; background: rgba(255,255,255,0.06); border-radius: 2px; overflow: hidden; }
.cc-confidence-fill { height: 100%; background: var(--gold); border-radius: 2px; transition: width 0.4s ease; }

.cc-actions { display: flex; gap: 6px; }
.cc-btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 5px;
  flex: 1; padding: 6px 0; border-radius: var(--radius-sm);
  font-size: 0.7rem; font-family: inherit; cursor: pointer; transition: all var(--transition);
}
.cc-btn-confirm {
  border: 1px solid var(--border-gold); background: rgba(185,152,88,0.12); color: var(--gold-light); font-weight: 500;
}
.cc-btn-confirm:hover { background: rgba(185,152,88,0.2); border-color: var(--border-focus); }
.cc-btn-modify { border: 1px solid var(--border); background: transparent; color: var(--text-soft); }
.cc-btn-modify:hover { border-color: var(--border-gold); color: var(--text); background: rgba(185,152,88,0.04); }

.cc-status { text-align: center; padding-bottom: 4px; }
.cc-status-badge {
  display: inline-block; padding: 1px 10px; border-radius: 10px;
  font-size: 0.6rem; font-weight: 500; letter-spacing: 0.04em;
}
.cc-status-badge.draft { border: 1px solid var(--border); color: var(--text-dim); background: rgba(255,255,255,0.03); }
.cc-status-badge.confirmed { border: 1px solid var(--border-gold); color: var(--gold-light); background: rgba(185,152,88,0.1); }
.cc-status-badge.executing { border: 1px solid var(--border-gold); color: var(--gold-light); background: rgba(185,152,88,0.15); animation: pulse 2s infinite; }
@keyframes pulse { 0%,100%{opacity:1} 50%{opacity:.5} }

.cc-edit { width: 100%; padding: 5px 7px; border: 1px solid var(--border-gold); border-radius: 4px; background: var(--bg-chat); color: var(--text); font-size: 0.74rem; font-family: inherit; line-height: 1.5; outline: none; }
.cc-edit:focus { border-color: var(--border-focus); box-shadow: 0 0 6px rgba(185,152,88,0.15); }
.cc-edit-ta { min-height: 50px; resize: vertical; font-size: 0.7rem; }
.cc-edit-hint { font-size: 0.56rem; color: var(--text-dim); margin-top: 2px; }

/* ═══════════════════════════════════════════════════════
   Center: Main Chat Area ~70%
   ═══════════════════════════════════════════════════════ */
.main-area {
  display: flex;
  flex-direction: column;
  min-width: 0;
  overflow: hidden;
  background: var(--bg);
}

.chat-area {
  flex: 1;
  overflow-y: auto;
  min-height: 0;
  display: flex;
  flex-direction: column;
  padding: 0 24px;
  /* No justify-content — empty state centers itself via flex:1 */
}

/* ── Empty / Welcome State ── */
.empty-state {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 2rem 1rem;
  text-align: center;
}

.empty-avatar {
  width: 64px; height: 64px; border-radius: 50%; overflow: hidden;
  border: 1.5px solid var(--border-gold);
  box-shadow: 0 0 24px rgba(185,152,88,0.1);
  margin-bottom: 1.2rem;
  flex-shrink: 0;
}
.empty-avatar img { width: 100%; height: 100%; object-fit: cover; display: block; }

.empty-greeting { font-size: 1.25rem; font-weight: 500; color: var(--text); letter-spacing: 0.03em; margin-bottom: 0.3rem; }
.empty-hint { font-size: 0.8rem; color: var(--text-soft); line-height: 1.5; margin-bottom: 1.4rem; max-width: 480px; }

.example-questions { display: flex; flex-direction: column; gap: 6px; width: 100%; max-width: 500px; }
.example-btn {
  display: block; width: 100%; padding: 8px 14px;
  border: 1px solid var(--border); border-radius: var(--radius-sm);
  background: var(--bg-chat); color: var(--text-soft); font-size: 0.76rem;
  font-family: inherit; text-align: center; cursor: pointer; transition: all var(--transition);
}
.example-btn:hover { border-color: var(--border-gold); color: var(--text); background: rgba(185,152,88,0.04); }

/* ── Messages ── */
.messages { padding: 1.2rem 0; }

.msg { display: flex; flex-direction: column; margin-bottom: 1.5rem; animation: msgIn 0.2s ease; }
.msg:first-child { margin-top: 0.4rem; }
.msg-user { align-items: flex-end; }
.msg-afu { align-items: flex-start; }
@keyframes msgIn { from{opacity:0;transform:translateY(6px)} to{opacity:1;transform:translateY(0)} }

.msg-afu .msg-row {
  display: flex; gap: 10px;
  max-width: min(var(--msg-max-w), 100%);
}
.msg-afu .msg-avatar {
  width: 36px; height: 36px; border-radius: 50%; overflow: hidden; flex-shrink: 0;
  border: 1px solid var(--border-gold); box-shadow: 0 0 10px rgba(185,152,88,0.06);
}
.msg-afu .msg-avatar img { width: 100%; height: 100%; object-fit: cover; display: block; }
.msg-afu .msg-body { display: flex; flex-direction: column; gap: 3px; min-width: 0; }
.msg-afu .msg-sender { font-size: 0.7rem; font-weight: 500; color: var(--text); letter-spacing: 0.02em; }
.msg-afu .msg-role { font-size: 0.6rem; color: var(--text-dim); font-weight: 400; margin-left: 5px; }
.msg-afu .msg-content { font-size: 0.82rem; line-height: 1.68; color: var(--text-soft); }

.msg-user .msg-bubble {
  max-width: min(var(--msg-max-w), 65%);
  padding: 8px 14px; border-radius: var(--radius);
  background: var(--bg-user); border: 1px solid var(--border);
  font-size: 0.82rem; line-height: 1.55; color: var(--text);
}

.copy-row { display: flex; align-items: center; margin-top: 6px; margin-left: 46px; }
.copy-btn {
  display: inline-flex; align-items: center; gap: 3px; padding: 2px 7px;
  border: none; border-radius: 4px; background: transparent; color: var(--text-dim);
  font-size: 0.62rem; font-family: inherit; cursor: pointer; transition: all var(--transition);
}
.copy-btn:hover { color: var(--gold); background: rgba(185,152,88,0.06); }
.dl-btn { margin-left: 4px; }
.dl-btn:hover { color: var(--gold-light); background: rgba(185,152,88,0.08); }

/* ── Markdown content ── */
.msg-content p { margin: 0 0 0.4em; }
.msg-content p:last-child { margin-bottom: 0; }
.msg-content h3 { font-size: 0.86rem; font-weight: 600; color: var(--text); margin: 0.7em 0 0.2em; }
.msg-content h4 { font-size: 0.8rem; font-weight: 600; color: var(--text); margin: 0.5em 0 0.15em; }
.msg-content h5 { font-size: 0.74rem; font-weight: 600; color: var(--text); margin: 0.4em 0 0.1em; }
.msg-content strong { color: var(--text); }
.msg-content code { font-size: 0.74rem; background: rgba(255,255,255,0.06); padding: 1px 5px; border-radius: 3px; border: 1px solid var(--border); }

/* ── Thinking indicator ── */
.msg-content-thinking { display: flex; align-items: center; gap: 2px; min-height: auto; }
.thinking-text { font-size: 0.82rem; color: var(--text-soft); }
.thinking-dots { display: inline-flex; }
.thinking-dots span {
  font-size: 0.82rem; color: var(--text-soft);
  animation: thinkDot 1.4s infinite;
}
.thinking-dots span:nth-child(2) { animation-delay: 0.2s; }
.thinking-dots span:nth-child(3) { animation-delay: 0.4s; }
@keyframes thinkDot {
  0%, 60%, 100% { opacity: 0.2; }
  30% { opacity: 1; }
}
.msg-content pre { background: rgba(0,0,0,0.3); border: 1px solid var(--border); border-radius: var(--radius-sm); padding: 10px 14px; margin: 8px 0; overflow-x: auto; font-size: 0.74rem; line-height: 1.5; }
.msg-content pre code { background: none; border: none; padding: 0; font-size: inherit; }
.msg-content hr { border: none; border-top: 1px solid var(--border); margin: 10px 0; }
.msg-content ul, .msg-content ol { padding-left: 1.2em; margin: 0.3em 0; }
.msg-content li { margin-bottom: 0.15em; }
.msg-content blockquote { border-left: 2px solid var(--border-gold); margin: 6px 0; padding: 2px 10px; color: var(--text-dim); }
.msg-content a { color: var(--gold-light); text-decoration: underline; text-underline-offset: 3px; }
.msg-content a:hover { color: var(--gold); }

.msg-table { width: 100%; border-collapse: collapse; margin: 6px 0; font-size: 0.7rem; }
.msg-table th { text-align: left; padding: 5px 8px; border-bottom: 1px solid var(--border-gold); color: var(--text); font-weight: 600; }
.msg-table td { padding: 4px 8px; border-bottom: 1px solid var(--border); color: var(--text-soft); }

/* ── Perspective cards ── */
.msg-perspective { padding: 6px 10px; margin: 3px 0; border-radius: var(--radius-sm); background: rgba(255,255,255,0.012); }
.msg-perspective .msg-avatar { border: none !important; box-shadow: none !important; background: transparent; }
.msg-content-rich strong { color: var(--text); }

/* ── Streaming cursor ── */
.msg-streaming .msg-content { min-height: 1.2em; }
.msg-streaming .msg-content::after { content:''; display:inline-block; width:5px; height:13px; background:var(--gold); margin-left:2px; vertical-align:text-bottom; animation:blink .8s infinite; }
@keyframes blink { 0%,100%{opacity:1} 50%{opacity:0} }

/* ── Tool indicator ── */
.msg-tool { padding: 2px 0 2px 46px; margin: 0 0 3px 0; font-size: 0.66rem; color: var(--text-dim); }
.tool-indicator { display:inline-flex; align-items:center; gap:7px; padding:2px 10px; border:1px solid var(--border); border-radius:20px; background:rgba(255,255,255,0.02); }
.tool-spinner { display:inline-block; width:9px; height:9px; border:1.5px solid var(--border); border-top-color:var(--gold); border-radius:50%; animation:spin .8s linear infinite; }
@keyframes spin { to{transform:rotate(360deg)} }
.tool-done { opacity: .5; }
.tool-done .tool-spinner { border-color: var(--gold-dim); animation: none; }

/* ═══════════════════════════════════════════════════════
   Composer — fixed at bottom of center column
   ═══════════════════════════════════════════════════════ */
.composer {
  flex-shrink: 0;
  padding: 10px 24px 14px;
  background: var(--bg);
  border-top: 1px solid var(--border);
}

.composer-box {
  display: flex; align-items: flex-end; gap: 8px;
  background: var(--bg-chat); border: 1px solid var(--border);
  border-radius: var(--radius-lg); padding: 6px 10px;
  transition: border-color var(--transition);
}
.composer-box:focus-within { border-color: var(--border-focus); }

.composer-attach {
  display: flex; align-items: center; justify-content: center;
  width: 28px; height: 28px; border: none; border-radius: 6px;
  background: transparent; color: var(--text-dim); cursor: pointer; flex-shrink: 0;
}
.composer-attach:hover { color: var(--text-soft); }

.composer-box textarea {
  flex: 1; background: transparent; border: none; color: var(--text);
  font-size: 0.82rem; font-family: inherit; line-height: 1.5;
  resize: none; padding: 3px 0; outline: none; max-height: 120px;
}
.composer-box textarea::placeholder { color: var(--text-dim); }

.composer-send {
  display: flex; align-items: center; justify-content: center;
  width: 30px; height: 30px; border: none; border-radius: 7px;
  background: var(--gold); color: #0D0D0D; cursor: pointer; flex-shrink: 0;
  transition: all var(--transition);
}
.composer-send:hover { background: var(--gold-light); }
.composer-send:active { transform: scale(0.95); }
.composer-send:disabled { opacity: 0.25; cursor: not-allowed; pointer-events: none; }

.composer-hint { margin-top: 6px; font-size: 0.62rem; color: var(--text-dim); text-align: center; }

/* ═══════════════════════════════════════════════════════
   Right: Turn Navigation ~10%
   ═══════════════════════════════════════════════════════ */
.turn-nav {
  display: flex; flex-direction: column;
  border-left: 1px solid var(--border);
  background: var(--bg-sidebar);
  overflow: hidden; min-width: 0;
}

.turn-nav-header {
  padding: 12px 10px; border-bottom: 1px solid var(--border); flex-shrink: 0;
}
.turn-nav-title { font-size: 0.64rem; font-weight: 500; color: var(--text-dim); letter-spacing: 0.04em; }

.turn-nav-list { flex: 1; overflow-y: auto; padding: 6px 0; }

.turn-node {
  display: flex; align-items: center; gap: 7px; padding: 6px 10px;
  cursor: pointer; transition: all var(--transition);
  border: none; background: none; width: 100%;
  text-align: left; font-family: inherit; position: relative;
  color: var(--text-dim);
}
.turn-node:hover { background: rgba(185,152,88,0.03); color: var(--text-soft); }

.turn-node.active .turn-dot {
  border-color: var(--gold); background: var(--gold);
  box-shadow: 0 0 6px rgba(185,152,88,0.25);
}
.turn-node.active .turn-label { color: var(--gold-light); }

/* ── Timeline connector lines ── */
.turn-line-top, .turn-line-bottom { position: absolute; left: 16px; width: 1px; background: var(--border); }
.turn-line-top { top: 0; height: 50%; }
.turn-line-bottom { top: 50%; height: 50%; }
.turn-node:first-child .turn-line-top,
.turn-node:last-child .turn-line-bottom { display: none; }
.turn-node.active .turn-line-top,
.turn-node.active .turn-line-bottom { background: var(--gold-dim); }

.turn-dot {
  width: 10px; height: 10px; border-radius: 50%;
  border: 1.5px solid var(--border); background: transparent;
  flex-shrink: 0; z-index: 1; transition: all var(--transition);
}
.turn-node:hover .turn-dot { border-color: var(--text-dim); }

.turn-label {
  flex: 1; font-size: 0.62rem; line-height: 1.2;
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
  min-width: 0;
}

.turn-tooltip {
  display: none; position: absolute; right: calc(100% + 6px); top: 50%;
  transform: translateY(-50%); padding: 4px 8px;
  background: var(--bg-chat); border: 1px solid var(--border-gold);
  border-radius: var(--radius-sm); font-size: 0.6rem; color: var(--text-soft);
  white-space: nowrap; z-index: 10; pointer-events: none;
}
.turn-node:hover .turn-tooltip { display: block; }

/* ═══════════════════════════════════════════════════════
   Scrollbar — subtle, per-column
   ═══════════════════════════════════════════════════════ */
.chat-area {
  scrollbar-width: thin;
  scrollbar-color: rgba(255,255,255,0.08) transparent;
}
.chat-area::-webkit-scrollbar { width: 4px; }
.chat-area::-webkit-scrollbar-track { background: transparent; }
.chat-area::-webkit-scrollbar-thumb { background: rgba(255,255,255,0.08); border-radius: 4px; }

.turn-nav-list {
  scrollbar-width: thin;
  scrollbar-color: rgba(255,255,255,0.04) transparent;
}
.turn-nav-list::-webkit-scrollbar { width: 2px; }
.turn-nav-list::-webkit-scrollbar-track { background: transparent; }
.turn-nav-list::-webkit-scrollbar-thumb { background: rgba(255,255,255,0.04); border-radius: 2px; }

.contract-body {
  scrollbar-width: thin;
  scrollbar-color: rgba(255,255,255,0.04) transparent;
}
.contract-body::-webkit-scrollbar { width: 2px; }
.contract-body::-webkit-scrollbar-track { background: transparent; }
.contract-body::-webkit-scrollbar-thumb { background: rgba(255,255,255,0.04); border-radius: 2px; }

/* ═══════════════════════════════════════════════════════
   Modal
   ═══════════════════════════════════════════════════════ */
.modal-overlay {
  position: fixed; inset: 0; background: rgba(0,0,0,0.65);
  display: flex; align-items: center; justify-content: center; z-index: 100;
  opacity: 0; pointer-events: none; transition: opacity 0.2s ease;
}
.modal-overlay.active { opacity: 1; pointer-events: auto; }
.modal { background: var(--bg-chat); border: 1px solid var(--border); border-radius: var(--radius); padding: 28px 32px; max-width: 400px; width: 90%; text-align: center; }
.modal-title { font-size: 0.9rem; font-weight: 500; color: var(--text); margin-bottom: 8px; }
.modal-body { font-size: 0.76rem; color: var(--text-soft); line-height: 1.6; margin-bottom: 18px; }
.modal-btn { display: inline-block; padding: 7px 24px; border: 1px solid var(--border-gold); border-radius: var(--radius-sm); background: rgba(185,152,88,0.08); color: var(--gold-light); font-size: 0.74rem; font-family: inherit; cursor: pointer; transition: all var(--transition); }
.modal-btn:hover { background: rgba(185,152,88,0.16); border-color: var(--border-focus); }
.modal-btn:disabled { opacity: 0.3; cursor: not-allowed; pointer-events: none; }
.modal-actions { display: flex; gap: 8px; justify-content: center; margin-top: 14px; }
.modal-btn-cancel { border-color: var(--border); background: transparent; color: var(--text-soft); }
.modal-btn-cancel:hover { border-color: var(--border-gold); color: var(--text); }

.modal-upload { border: 1.5px dashed var(--border); border-radius: var(--radius); padding: 24px 14px; margin: 10px 0; text-align: center; cursor: pointer; transition: all 0.2s ease; }
.modal-upload:hover, .modal-upload.has-file { border-color: var(--border-gold); background: rgba(185,152,88,0.04); }
.modal-upload-icon { color: var(--text-dim); margin-bottom: 6px; }
.modal-upload-text { font-size: 0.72rem; color: var(--text-soft); }
.modal-upload-link { color: var(--gold-light); text-decoration: underline; cursor: pointer; }
.modal-upload-hint { font-size: 0.62rem; color: var(--text-dim); margin-top: 4px; }

.modal-format-picker { display: flex; gap: 6px; margin: 10px 0; }
.mf-option { flex:1; display:flex; flex-direction:column; align-items:center; gap:3px; padding:12px 8px; border:1px solid var(--border); border-radius:var(--radius-sm); cursor:pointer; transition:all var(--transition); }
.mf-option:hover { border-color: var(--border-gold); }
.mf-option.active { border-color: var(--border-gold); background: rgba(185,152,88,0.08); }
.mf-radio { width:10px; height:10px; border-radius:50%; border:1.5px solid var(--border); transition:all var(--transition); }
.mf-option.active .mf-radio { border-color:var(--gold); background:var(--gold); box-shadow:0 0 6px rgba(185,152,88,0.3); }
.mf-label { font-size:0.74rem; font-weight:500; color:var(--text); }
.mf-hint { font-size:0.6rem; color:var(--text-dim); }

/* ═══════════════════════════════════════════════════════
   Responsive — collapse to single column
   ═══════════════════════════════════════════════════════ */
@media (max-width: 960px) {
  .app-body {
    grid-template-columns: 1fr;
    grid-template-rows: auto 1fr;
  }
  .contract-sidebar { border-right: none; border-bottom: 1px solid var(--border); max-height: 25vh; }
  .turn-nav { display: none; }
  .topbar { padding: 0 16px; }
  .topbar-status { display: none; }
  .topbar-right .btn-outline span, .topbar-right .btn-accent span { display: none; }
  .topbar-right .btn-outline, .topbar-right .btn-accent { padding: 6px 8px; gap: 0; }
  .topbar-right { gap: 4px; }
  .chat-area { padding: 0 16px; }
  .composer { padding: 8px 16px 12px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
}