:root {
  --paper: #f4efe6;
  --paper-2: #eae3d4;
  --ink: #1f1b17;
  --ink-soft: #4a433b;
  --accent: #d7462f; /* stamp red */
  --accent-2: #c9a24a; /* brass */
  --line: #2a241e;
  --rule: rgba(31, 27, 23, 0.18);
  --shadow: 0 18px 40px -22px rgba(31, 27, 23, 0.45);
  --card-bg: #fbf7ee;
  --tape: rgba(215, 70, 47, 0.08);
}

* {
  box-sizing: border-box;
}

/* HTML `hidden` attribute must beat any display: flex/grid rule below */
[hidden] {
  display: none !important;
}

/* ───────── LOGIN PAGE ───────── */
.login-body {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
}

.login-wrap {
  width: 100%;
  max-width: 420px;
  padding: 40px 20px;
  position: relative;
  z-index: 1;
}

.login-card {
  padding: 44px 36px 36px;
}

.login-brand {
  text-align: center;
  margin-bottom: 32px;
  padding-bottom: 22px;
  border-bottom: 1px dashed var(--rule);
}

.login-brand .brand-mark {
  font-size: 44px;
  color: var(--accent);
  display: block;
  margin-bottom: 4px;
}

.login-brand h1 {
  font-family: "DM Serif Display", serif;
  font-style: italic;
  font-size: 42px;
  margin: 0 0 4px;
}

.login-err {
  min-height: 18px;
  color: var(--accent);
  font-family: "JetBrains Mono", monospace;
  font-size: 11px;
  text-align: center;
  margin: 12px 0 4px;
}

.login-foot {
  text-align: center;
  font-family: "JetBrains Mono", monospace;
  font-size: 10px;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  margin-top: 24px;
  padding-top: 16px;
  border-top: 1px dashed var(--rule);
}

/* logout button used on studio/chat headers */
.logout-btn {
  margin-left: 10px;
  padding: 6px 12px;
  font-family: "JetBrains Mono", monospace;
  font-size: 10px;
  letter-spacing: 1.2px;
  text-transform: uppercase;
  background: transparent;
  border: 1px dashed var(--rule);
  color: var(--ink-soft);
  cursor: pointer;
  border-radius: 2px;
  transition: all 0.15s;
}

.logout-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
}

html,
body {
  margin: 0;
  padding: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 15px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  background-image:
    radial-gradient(circle at 20% 10%, rgba(201, 162, 74, 0.08), transparent 40%),
    radial-gradient(circle at 80% 80%, rgba(215, 70, 47, 0.06), transparent 50%),
    repeating-linear-gradient(
      0deg,
      rgba(42, 36, 30, 0.025) 0 1px,
      transparent 1px 28px
    );
  pointer-events: none;
  z-index: 0;
}

.studio-header,
.desk,
.toast,
.loading {
  position: relative;
  z-index: 1;
}

/* ───────── HEADER ───────── */
.studio-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 28px 44px 18px;
  border-bottom: 1px dashed var(--rule);
}

.brand {
  display: flex;
  align-items: center;
  gap: 16px;
}

.brand-mark {
  font-size: 42px;
  color: var(--accent);
  transform: translateY(-4px);
}

.brand h1 {
  font-family: "DM Serif Display", serif;
  margin: 0;
  font-size: 38px;
  letter-spacing: 0.5px;
  font-style: italic;
}

.tagline {
  margin: 0;
  font-size: 11px;
  letter-spacing: 3.5px;
  text-transform: uppercase;
  color: var(--ink-soft);
}

.session-meta {
  font-family: "JetBrains Mono", monospace;
  font-size: 11px;
  padding: 6px 12px;
  border: 1px solid var(--rule);
  border-radius: 2px;
  color: var(--ink-soft);
  background: var(--tape);
}

.top-nav {
  display: flex;
  gap: 4px;
}

.top-nav a {
  font-family: "JetBrains Mono", monospace;
  font-size: 11px;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  padding: 8px 16px;
  color: var(--ink-soft);
  text-decoration: none;
  border: 1px solid var(--rule);
  border-radius: 2px;
  background: transparent;
  transition: all 0.15s;
}

.top-nav a:hover {
  color: var(--accent);
  border-color: var(--accent);
}

.top-nav a.active {
  background: var(--ink);
  color: var(--paper);
  border-color: var(--ink);
}

/* ───────── DESK LAYOUT ───────── */
.desk {
  display: grid;
  grid-template-columns: 380px 1fr;
  gap: 32px;
  padding: 28px 44px 80px;
  min-height: calc(100vh - 110px);
}

@media (max-width: 960px) {
  .desk {
    grid-template-columns: 1fr;
    padding: 20px;
  }
  .studio-header {
    padding: 14px 20px;
    gap: 8px;
  }
  .brand h1 {
    font-size: 28px;
  }
  .tagline {
    font-size: 10px;
    letter-spacing: 2px;
  }
}

.pane {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

/* ───────── CARD (paper sheet) ───────── */
.card {
  position: relative;
  background: var(--card-bg);
  padding: 28px 28px 26px;
  border: 1px solid var(--rule);
  box-shadow: var(--shadow);
  border-radius: 2px;
}

.card::before {
  content: "";
  position: absolute;
  top: -14px;
  left: 28px;
  width: 72px;
  height: 20px;
  background: var(--tape);
  border: 1px dashed rgba(215, 70, 47, 0.25);
  transform: rotate(-2deg);
}

.card-head {
  display: flex;
  align-items: baseline;
  gap: 14px;
  margin-bottom: 18px;
  padding-bottom: 14px;
  border-bottom: 1px dashed var(--rule);
}

.card-head h2 {
  font-family: "DM Serif Display", serif;
  font-size: 26px;
  margin: 0;
  color: var(--ink);
  font-style: italic;
}

.stamp {
  font-family: "JetBrains Mono", monospace;
  font-size: 10px;
  letter-spacing: 1.5px;
  padding: 4px 8px;
  border: 1px solid var(--accent);
  color: var(--accent);
  text-transform: uppercase;
  transform: rotate(-1.5deg);
}

.model-tag {
  margin-left: auto;
  font-family: "JetBrains Mono", monospace;
  font-size: 10px;
  color: var(--ink-soft);
  background: var(--paper-2);
  padding: 3px 8px;
  border-radius: 2px;
}

/* ───────── BRIEF CARD ───────── */
.drop {
  display: block;
  position: relative;
  border: 2px dashed rgba(31, 27, 23, 0.3);
  background: #fdfaf3;
  min-height: 180px;
  margin-bottom: 18px;
  cursor: pointer;
  transition: all 0.2s;
  overflow: hidden;
}

.drop:hover {
  border-color: var(--accent);
  background: #fffbef;
}

.drop.dragging {
  border-color: var(--accent);
  background: rgba(215, 70, 47, 0.05);
}

.drop-inner {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  color: var(--ink-soft);
  text-align: center;
  font-size: 13px;
}

.drop-icon {
  font-size: 32px;
  margin-bottom: 6px;
  color: var(--accent);
}

.drop-text span {
  font-size: 11px;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--ink-soft);
}

.thumb-strip {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: -4px 0 18px;
  min-height: 0;
}

.thumb-strip:empty {
  display: none;
}

.thumb {
  position: relative;
  width: 72px;
  height: 72px;
  border: 1px solid var(--rule);
  background: #fffdf6;
  overflow: hidden;
  box-shadow: 0 6px 12px -8px rgba(31, 27, 23, 0.4);
}

.thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.thumb-remove {
  position: absolute;
  top: 2px;
  right: 2px;
  width: 18px;
  height: 18px;
  border: none;
  background: rgba(31, 27, 23, 0.85);
  color: #fff;
  cursor: pointer;
  font-size: 11px;
  line-height: 1;
  padding: 0;
  border-radius: 2px;
}

.thumb-remove:hover {
  background: var(--accent);
}

.ref-strip {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding: 10px 0 6px;
}

.ref-strip img {
  width: 72px;
  height: 72px;
  object-fit: cover;
  border: 1px solid var(--rule);
  box-shadow: 0 6px 12px -8px rgba(31, 27, 23, 0.4);
}

.field {
  display: block;
  margin-bottom: 18px;
}

.field > span {
  display: block;
  font-family: "JetBrains Mono", monospace;
  font-size: 10px;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--ink-soft);
  margin-bottom: 6px;
}

textarea,
input[type="text"],
input[type="password"],
input[type="email"] {
  width: 100%;
  padding: 12px 14px;
  font-family: inherit;
  font-size: 14px;
  color: var(--ink);
  background: #fffdf6;
  border: 1px solid var(--rule);
  border-radius: 2px;
  resize: vertical;
  outline: none;
  transition: border-color 0.2s;
  -webkit-appearance: none;
  appearance: none;
}

textarea:focus,
input[type="text"]:focus,
input[type="password"]:focus,
input[type="email"]:focus {
  border-color: var(--accent);
}

/* ───────── BUTTONS ───────── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 20px;
  font-family: "JetBrains Mono", monospace;
  font-size: 12px;
  letter-spacing: 1.2px;
  text-transform: uppercase;
  cursor: pointer;
  border-radius: 2px;
  transition: all 0.15s;
  border: 1px solid var(--line);
}

.btn--primary {
  background: var(--ink);
  color: var(--paper);
  width: 100%;
}
.btn--primary:hover {
  background: var(--accent);
  border-color: var(--accent);
}

.btn--ghost {
  background: transparent;
  color: var(--ink);
  border: 1px dashed var(--rule);
}
.btn--ghost:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.btn--positive {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}
.btn--positive:hover {
  background: #b73a25;
}

.btn .dot {
  width: 6px;
  height: 6px;
  background: var(--accent-2);
  border-radius: 50%;
  display: inline-block;
}

/* ───────── BOARD (right pane) ───────── */
.pane--board {
  min-height: 640px;
}

.board {
  display: flex;
  flex-direction: column;
  gap: 28px;
  height: 100%;
}

.idle-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  color: var(--ink-soft);
  padding: 120px 40px;
  border: 2px dashed var(--rule);
  background: rgba(255, 253, 246, 0.4);
}

.idle-icon {
  font-size: 64px;
  color: var(--accent-2);
  margin-bottom: 18px;
  font-family: "DM Serif Display", serif;
}

/* ───────── PALETTE CARD ───────── */
.palette-row {
  display: flex;
  gap: 0;
  height: 90px;
  margin-bottom: 22px;
  border: 1px solid var(--rule);
}

.swatch {
  flex: 1;
  display: flex;
  align-items: flex-end;
  justify-content: center;
  padding-bottom: 8px;
  font-family: "JetBrains Mono", monospace;
  font-size: 10px;
  color: #fff;
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.4);
  position: relative;
}

.kw-row {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 18px;
}

.kw-block h4 {
  font-family: "JetBrains Mono", monospace;
  font-size: 10px;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--ink-soft);
  margin: 0 0 8px;
}

.chips {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.chip {
  display: inline-block;
  padding: 4px 10px;
  background: var(--paper-2);
  border: 1px solid var(--rule);
  border-radius: 20px;
  font-size: 12px;
  color: var(--ink);
}

/* ───────── CONCEPT CARD ───────── */
.markdown {
  font-size: 14px;
  line-height: 1.7;
  color: var(--ink);
  padding: 6px 2px 16px;
  border-bottom: 1px dashed var(--rule);
  margin-bottom: 16px;
}

.markdown h1,
.markdown h2,
.markdown h3 {
  font-family: "DM Serif Display", serif;
  font-style: italic;
  color: var(--ink);
  margin: 22px 0 8px;
  font-weight: normal;
}

.markdown h2 {
  font-size: 22px;
  border-bottom: 1px solid var(--rule);
  padding-bottom: 4px;
}

.markdown h3 {
  font-size: 17px;
}

.markdown p {
  margin: 8px 0;
}

.markdown ul,
.markdown ol {
  padding-left: 22px;
}

.markdown li {
  margin: 4px 0;
}

.markdown code {
  background: var(--paper-2);
  padding: 1px 6px;
  border-radius: 2px;
  font-family: "JetBrains Mono", monospace;
  font-size: 12px;
}

.image-prompt {
  margin: 6px 0 16px;
  padding: 12px 14px;
  background: #fffbef;
  border: 1px dashed var(--rule);
}

.image-prompt summary {
  cursor: pointer;
  font-family: "JetBrains Mono", monospace;
  font-size: 11px;
  letter-spacing: 1px;
  color: var(--ink-soft);
  margin-bottom: 8px;
}

.image-prompt textarea {
  margin-top: 10px;
  font-family: "JetBrains Mono", monospace;
  font-size: 12px;
  background: #fffefa;
}

.hitl-row {
  display: flex;
  gap: 10px;
  margin-top: 4px;
}

.hitl-row .btn {
  flex: 1;
}

/* ───────── MOCKUP CARD ───────── */
.mockup-frame {
  background: #fffdf6;
  border: 1px solid var(--rule);
  padding: 14px;
  margin-bottom: 18px;
  box-shadow: inset 0 0 0 1px rgba(201, 162, 74, 0.12);
}

.mockup-frame img {
  width: 100%;
  display: block;
}

.mockup-meta {
  margin: -6px 0 14px;
  font-family: "JetBrains Mono", monospace;
  font-size: 11px;
  letter-spacing: 1.1px;
  text-transform: uppercase;
  color: var(--ink-soft);
}

.mockup-options {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 12px;
  margin-bottom: 16px;
}

.mockup-option {
  appearance: none;
  border: 1px solid var(--rule);
  background: #fffdf6;
  padding: 10px;
  text-align: left;
  cursor: pointer;
  transition: transform 0.15s, border-color 0.15s, box-shadow 0.15s;
}

.mockup-option:hover {
  transform: translateY(-1px);
  border-color: var(--accent);
}

.mockup-option.active {
  border-color: var(--accent);
  box-shadow: inset 0 0 0 1px rgba(215, 70, 47, 0.2);
}

.mockup-option img {
  width: 100%;
  display: block;
  margin-top: 8px;
  border: 1px solid rgba(31, 27, 23, 0.08);
}

.mockup-option__label {
  display: block;
  font-family: "JetBrains Mono", monospace;
  font-size: 11px;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--ink-soft);
}

.feedback-bar {
  display: flex;
  gap: 8px;
}

.feedback-bar input {
  flex: 1;
}

/* ───────── PREFS LIST ───────── */
.muted {
  color: var(--ink-soft);
  font-size: 12px;
  margin: 6px 0 12px;
}

.prefs-list {
  list-style: none;
  padding: 0;
  margin: 14px 0 0;
  max-height: 320px;
  overflow-y: auto;
}

.prefs-list li {
  padding: 10px 12px;
  border-bottom: 1px dashed var(--rule);
  font-size: 12px;
  color: var(--ink-soft);
}

.prefs-list li strong {
  color: var(--ink);
  display: block;
  font-size: 13px;
  margin-bottom: 2px;
}

.prefs-list li.clickable {
  cursor: pointer;
  transition: background 0.15s;
}

.prefs-list li.clickable:hover {
  background: var(--tape);
  border-left: 2px solid var(--accent);
  padding-left: 10px;
}

.prefs-list li.active {
  background: var(--tape);
  border-left: 2px solid var(--accent);
  padding-left: 10px;
}

.prefs-list li.clickable {
  position: relative;
  padding-right: 28px;
}

.list-del {
  position: absolute;
  top: 50%;
  right: 8px;
  transform: translateY(-50%);
  width: 20px;
  height: 20px;
  border: 1px solid var(--rule);
  background: transparent;
  color: var(--ink-soft);
  cursor: pointer;
  font-size: 11px;
  line-height: 1;
  padding: 0;
  border-radius: 2px;
  opacity: 0;
  transition: all 0.15s;
}

.prefs-list li:hover .list-del {
  opacity: 1;
}

.list-del:hover {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}

.session-meta-row {
  display: flex;
  gap: 8px;
  font-size: 10px;
  font-family: "JetBrains Mono", monospace;
  color: var(--ink-soft);
  margin-top: 3px;
}

.session-meta-row .tag {
  padding: 1px 6px;
  background: var(--paper-2);
  border-radius: 2px;
}

.session-meta-row .tag.ok {
  background: rgba(215, 70, 47, 0.15);
  color: var(--accent);
}

/* ───────── HELPERS ───────── */
.hidden {
  display: none !important;
}

/* ───────── TOAST / LOADING ───────── */
.toast {
  position: fixed;
  bottom: 28px;
  left: 50%;
  transform: translateX(-50%);
  padding: 12px 20px;
  background: var(--ink);
  color: var(--paper);
  font-family: "JetBrains Mono", monospace;
  font-size: 12px;
  letter-spacing: 0.8px;
  z-index: 100;
  box-shadow: var(--shadow);
}

.loading {
  position: fixed;
  inset: 0;
  background: rgba(244, 239, 230, 0.85);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 20px;
  z-index: 90;
  backdrop-filter: blur(3px);
}

.loader {
  width: 48px;
  height: 48px;
  border: 3px solid var(--rule);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.9s linear infinite;
}

.loading p {
  font-family: "JetBrains Mono", monospace;
  font-size: 12px;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--ink);
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

/* ───────── CHAT PAGE ───────── */
.chat-body {
  height: 100vh;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.chat-body .studio-header {
  flex-shrink: 0;
}

.chat-shell {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 28px;
  padding: 20px 44px 28px;
  flex: 1;
  min-height: 0;
  position: relative;
  z-index: 1;
}

.chat-sidebar {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 22px 20px;
  background: var(--card-bg);
  border: 1px solid var(--rule);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.chat-sidebar .muted {
  margin-top: 6px;
  padding-top: 10px;
  border-top: 1px dashed var(--rule);
}

.conv-list {
  list-style: none;
  padding: 0;
  margin: 0;
  overflow-y: auto;
  flex: 1;
}

.conv-list li {
  padding: 10px 30px 10px 12px;
  border-bottom: 1px dashed var(--rule);
  font-size: 13px;
  color: var(--ink);
  cursor: pointer;
  position: relative;
  transition: all 0.15s;
}

.conv-list li:hover {
  background: var(--tape);
}

.conv-list li.active {
  background: var(--tape);
  border-left: 2px solid var(--accent);
  padding-left: 10px;
}

.conv-list li .conv-title {
  font-weight: 500;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.conv-list li .conv-sub {
  font-size: 10px;
  color: var(--ink-soft);
  font-family: "JetBrains Mono", monospace;
  margin-top: 2px;
}

.conv-list .list-del {
  opacity: 0;
}

.conv-list li:hover .list-del {
  opacity: 1;
}

/* chat main column */
.chat-main {
  display: flex;
  flex-direction: column;
  background: var(--card-bg);
  border: 1px solid var(--rule);
  box-shadow: var(--shadow);
  min-height: 0;
  overflow: hidden;
}

.chat-head {
  padding: 18px 28px;
  border-bottom: 1px dashed var(--rule);
  display: flex;
  align-items: baseline;
  gap: 14px;
}

.chat-head h2 {
  font-family: "DM Serif Display", serif;
  font-size: 22px;
  font-style: italic;
  margin: 0;
  flex: 1;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.chat-thread {
  flex: 1;
  overflow-y: auto;
  padding: 26px 28px 20px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.chat-empty {
  margin: auto;
  text-align: center;
  color: var(--ink-soft);
}

.chat-empty .idle-icon {
  font-size: 64px;
  color: var(--accent-2);
  font-family: "DM Serif Display", serif;
  margin-bottom: 12px;
}

.msg {
  max-width: 78%;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.msg.user {
  align-self: flex-end;
  align-items: flex-end;
}

.msg.assistant {
  align-self: flex-start;
  align-items: flex-start;
}

.msg .bubble {
  padding: 14px 18px;
  background: #fffdf6;
  border: 1px solid var(--rule);
  font-size: 14px;
  line-height: 1.65;
  color: var(--ink);
  box-shadow: 0 6px 12px -10px rgba(31, 27, 23, 0.35);
  border-radius: 2px;
  white-space: pre-wrap;
  word-break: break-word;
}

.msg.user .bubble {
  background: var(--ink);
  color: var(--paper);
  border-color: var(--ink);
  white-space: pre-wrap;
}

.msg.assistant .bubble {
  background: #fffdf6;
  position: relative;
}

.msg.assistant .bubble::before {
  content: "✦";
  position: absolute;
  left: -22px;
  top: 16px;
  color: var(--accent);
  font-size: 14px;
}

.msg .bubble .markdown {
  font-size: 14px;
  padding: 0;
  border: none;
  margin: 0;
  white-space: normal; /* pre-wrap 상속 차단 — HTML 마크다운 줄간격 정상화 */
}

.msg .bubble .markdown h1,
.msg .bubble .markdown h2,
.msg .bubble .markdown h3 {
  margin: 10px 0 4px;
  font-size: 16px;
}

.msg .bubble .markdown p {
  margin: 4px 0;
}

.msg .bubble .markdown ul,
.msg .bubble .markdown ol {
  padding-left: 20px;
  margin: 4px 0 6px;
}

/* 코드 블록 */
.msg .bubble .markdown pre {
  background: var(--paper-2);
  border: 1px solid var(--rule);
  border-radius: 2px;
  padding: 10px 14px;
  margin: 8px 0;
  overflow-x: auto;
  font-family: "JetBrains Mono", monospace;
  font-size: 12px;
  line-height: 1.55;
  white-space: pre;
}
.msg .bubble .markdown pre code {
  background: none;
  padding: 0;
  font-size: inherit;
  border-radius: 0;
}

/* 인라인 코드 */
.msg .bubble .markdown code {
  background: var(--paper-2);
  padding: 1px 5px;
  border-radius: 2px;
  font-family: "JetBrains Mono", monospace;
  font-size: 12px;
}

/* blockquote */
.msg .bubble .markdown blockquote {
  border-left: 3px solid var(--accent);
  margin: 6px 0;
  padding: 4px 12px;
  color: var(--ink-soft);
  font-style: italic;
}
.msg .bubble .markdown blockquote p { margin: 2px 0; }

/* 표 */
.msg .bubble .markdown table {
  border-collapse: collapse;
  width: 100%;
  margin: 8px 0;
  font-size: 13px;
}
.msg .bubble .markdown th,
.msg .bubble .markdown td {
  border: 1px solid var(--rule);
  padding: 6px 10px;
  text-align: left;
}
.msg .bubble .markdown th {
  background: var(--paper-2);
  font-weight: 600;
}

/* 수평선 */
.msg .bubble .markdown hr {
  border: none;
  border-top: 1px dashed var(--rule);
  margin: 10px 0;
}

/* 링크 */
.msg .bubble .markdown a {
  color: var(--accent);
  text-decoration: underline;
  text-underline-offset: 2px;
}

.msg .bubble .markdown ul {
  padding-left: 18px;
  margin: 6px 0;
}

.msg .role-tag {
  font-family: "JetBrains Mono", monospace;
  font-size: 9px;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--ink-soft);
}

.msg.thinking .bubble {
  color: var(--ink-soft);
  font-style: italic;
}

.msg.thinking .bubble::after {
  content: " …";
  animation: pulse 1.1s infinite;
}

@keyframes pulse {
  0%,
  100% {
    opacity: 0.3;
  }
  50% {
    opacity: 1;
  }
}

.chat-input {
  padding: 16px 20px 18px;
  border-top: 1px dashed var(--rule);
  display: flex;
  gap: 10px;
  align-items: flex-end;
  background: var(--paper-2);
}

.chat-input-col {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 8px;
  min-width: 0;
}

.chat-attach-strip {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}
.chat-attach-strip:empty {
  display: none;
}
.chat-attach-strip .thumb {
  width: 56px;
  height: 56px;
}

.chat-input textarea {
  width: 100%;
  min-height: 44px;
  max-height: 200px;
  resize: none;
  font-family: inherit;
  font-size: 14px;
}

.chat-input textarea:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.chat-input .btn {
  width: auto;
  flex-shrink: 0;
}

.chat-attach-btn {
  padding: 12px 14px;
  font-size: 16px;
}
.chat-attach-btn:disabled {
  opacity: 0.35;
  cursor: not-allowed;
}

/* ── Model Selector (Chat) ── */
.model-select {
  background: #1e1e30;
  color: #e0e0e0;
  border: 1px solid #444;
  border-radius: 8px;
  padding: 7px 10px;
  font-size: 0.82rem;
  font-family: inherit;
  cursor: pointer;
  min-width: 92px;
  text-align: center;
  transition: border-color 0.2s, box-shadow 0.2s;
  align-self: center;
}
.model-select option {
  background: #1e1e30;
  color: #e0e0e0;
}
.model-select:hover:not(:disabled) {
  border-color: #7c5cbf;
}
.model-select:focus {
  outline: none;
  border-color: #7c5cbf;
  box-shadow: 0 0 0 2px rgba(124, 92, 191, 0.25);
}
.model-select:disabled {
  opacity: 0.35;
  cursor: not-allowed;
}

/* attachments inside message bubbles */
.msg-attachments {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 6px;
}

.msg-attachments img {
  width: 120px;
  height: 120px;
  object-fit: cover;
  border: 1px solid var(--rule);
  cursor: pointer;
  transition: transform 0.15s;
}

.msg-attachments img:hover {
  transform: scale(1.04);
}

.msg-generated {
  margin-top: 12px;
  padding: 12px;
  background: #fffbef;
  border: 1px dashed var(--rule);
  box-shadow: inset 0 0 0 1px rgba(201, 162, 74, 0.12);
}

.msg-generated img {
  width: 100%;
  max-width: 480px;
  display: block;
  border: 1px solid var(--rule);
}

.msg-generated .gen-grid {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.msg-generated .gen-grid.multi {
  flex-direction: row;
  flex-wrap: wrap;
}

.msg-generated .gen-grid.multi .gen-item {
  flex: 1 1 240px;
  min-width: 0;
}

.msg-generated .gen-grid.multi img {
  max-width: 100%;
}

.msg-generated .gen-label {
  font-family: "JetBrains Mono", monospace;
  font-size: 10px;
  letter-spacing: 1px;
  color: var(--ink-soft);
  margin-bottom: 4px;
}

.msg-generated .tag {
  display: inline-block;
  font-family: "JetBrains Mono", monospace;
  font-size: 9px;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 8px;
}

/* ═══════════════════════════════════════════════
   RESPONSIVE — 파일 맨 끝 (cascade 최우선)
   ═══════════════════════════════════════════════ */

/* 데스크탑: 토글/backdrop 숨김 */
@media (min-width: 821px) {
  .sidebar-toggle   { display: none; }
  .sidebar-backdrop { display: none !important; }
}

/* 960px 이하 — 헤더 compact */
@media (max-width: 960px) {
  .studio-header { padding: 14px 20px; gap: 8px; }
  .brand h1      { font-size: 28px; }
  .tagline       { font-size: 10px; letter-spacing: 2px; }
}

/* 820px 이하 — 모바일 전체 */
@media (max-width: 820px) {
  /* 헤더 */
  .studio-header { padding: 10px 16px; flex-wrap: wrap; gap: 8px; }
  .brand-mark    { font-size: 28px; }
  .brand h1      { font-size: 22px; }
  .tagline       { display: none; }
  .top-nav a     { padding: 6px 10px; font-size: 10px; letter-spacing: 1px; }
  .logout-btn    { padding: 5px 8px; font-size: 9px; letter-spacing: 0.8px; }

  /* 채팅 쉘: sidebar fixed overlay → 단일 컬럼
     z-index: auto 로 stacking context 해제 → sidebar가 backdrop 위에 올라옴 */
  .chat-shell {
    display: flex;
    flex-direction: column;
    padding: 0;
    gap: 0;
    z-index: auto;
  }

  /* 햄버거 토글 버튼 */
  .sidebar-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 34px;
    height: 34px;
    flex-shrink: 0;
    align-self: center;
    background: transparent;
    border: 1px dashed var(--rule);
    color: var(--ink);
    cursor: pointer;
    font-size: 16px;
    border-radius: 2px;
    transition: all 0.15s;
  }
  .sidebar-toggle:hover {
    border-color: var(--accent);
    color: var(--accent);
  }

  /* 사이드바: 왼쪽 슬라이드 drawer */
  .chat-sidebar {
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    width: 290px;
    max-height: none;
    z-index: 200;
    transform: translateX(-100%);
    transition: transform 0.26s cubic-bezier(0.4, 0, 0.2, 1);
    overflow-y: auto;
    padding: 22px 18px;
    border: none;
    border-right: 1px solid var(--rule);
    box-shadow: none;
    gap: 12px;
  }
  .chat-sidebar.open {
    transform: translateX(0);
    box-shadow: 8px 0 28px -6px rgba(31, 27, 23, 0.28);
  }

  /* 반투명 backdrop */
  .sidebar-backdrop {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(31, 27, 23, 0.4);
    z-index: 199;
    backdrop-filter: blur(1px);
    -webkit-backdrop-filter: blur(1px);
  }
  .sidebar-backdrop.open { display: block; }

  /* 채팅 메인: 전체 너비/높이 */
  .chat-main { flex: 1; min-height: 0; width: 100%; }
  .chat-head { padding: 11px 16px; align-items: center; }
  .chat-head h2 { font-size: 17px; }

  /* 스레드 */
  .chat-thread { padding: 16px 12px 12px 24px; gap: 14px; }
  .msg { max-width: 90%; }
  .msg.assistant .bubble::before { left: -16px; font-size: 12px; }
  .msg .bubble { padding: 11px 14px; font-size: 13px; }

  /* 입력창 */
  .chat-input { padding: 10px 12px 12px; gap: 6px; }
  .chat-input textarea { font-size: 16px; min-height: 40px; }
  .chat-attach-btn { padding: 9px 11px; font-size: 14px; }
  .model-select { min-width: 78px; font-size: 0.75rem; padding: 6px 8px; }
  .chat-input .btn--primary { padding: 9px 12px; font-size: 11px; letter-spacing: 1px; }
}

/* 480px 이하 — 초소형 */
@media (max-width: 480px) {
  .brand { gap: 8px; }
  .brand-mark { font-size: 22px; }
  .brand h1   { font-size: 19px; }
  .top-nav a  { padding: 5px 8px; font-size: 9px; }
  .chat-thread { padding: 12px 10px 10px 22px; }
  .msg { max-width: 95%; }
  .msg-attachments img { width: 90px; height: 90px; }
}