.content-os-page {
  background:
    linear-gradient(135deg, rgba(230,48,34,0.08), transparent 28%),
    radial-gradient(circle at 80% 10%, rgba(37,99,235,0.1), transparent 32%),
    var(--bg);
}

.cos-shell {
  min-height: 100vh;
  padding: 104px 20px 28px;
}

.cos-topbar {
  max-width: 1480px;
  margin: 0 auto 18px;
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 24px;
}

.cos-kicker {
  color: var(--red);
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  margin-bottom: 6px;
}

.cos-topbar h1 {
  font-family: var(--ff-display);
  font-size: clamp(2.2rem, 5vw, 4.8rem);
  line-height: 0.95;
  margin-bottom: 8px;
}

.cos-topbar p {
  color: var(--text-3);
  max-width: 680px;
}

.cos-flow {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.cos-flow span {
  border: 1px solid var(--border);
  background: var(--bg-card);
  color: var(--text-2);
  border-radius: 100px;
  padding: 7px 12px;
  font-size: 0.72rem;
  font-weight: 800;
  text-transform: uppercase;
}

.cos-dev-notice {
  max-width: 1480px;
  margin: 0 auto 18px;
  border: 1px solid rgba(230,48,34,0.34);
  border-radius: 8px;
  background:
    linear-gradient(135deg, rgba(230,48,34,0.14), rgba(124,58,237,0.08)),
    rgba(255,255,255,0.035);
  padding: 16px 18px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
}

.cos-dev-notice__eyebrow,
.cos-dev-notice__status {
  color: var(--red);
  font-size: 0.68rem;
  font-weight: 900;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.cos-dev-notice h2 {
  margin: 5px 0 6px;
  font-size: clamp(1.1rem, 2vw, 1.55rem);
  line-height: 1.18;
}

.cos-dev-notice p {
  color: var(--text-2);
  max-width: 860px;
  font-size: 0.92rem;
}

.cos-dev-notice__status {
  border: 1px solid rgba(230,48,34,0.34);
  border-radius: 100px;
  background: rgba(230,48,34,0.1);
  padding: 8px 11px;
  white-space: nowrap;
}

.cos-workspace {
  max-width: 1480px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: minmax(300px, 0.9fr) minmax(420px, 1.35fr) minmax(310px, 0.95fr);
  gap: 14px;
  align-items: start;
}

.cos-panel {
  background: rgba(26,26,30,0.82);
  border: 1px solid var(--border);
  border-radius: 8px;
  box-shadow: var(--shadow);
  min-height: calc(100vh - 210px);
  overflow: hidden;
}

[data-theme="light"] .cos-panel {
  background: rgba(255,255,255,0.84);
}

.cos-panel__head {
  min-height: 70px;
  padding: 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  border-bottom: 1px solid var(--border);
  background: rgba(255,255,255,0.025);
}

.cos-panel__head h2 {
  font-size: 0.95rem;
  line-height: 1.2;
}

.cos-panel__actions {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.cos-step {
  display: block;
  color: var(--red);
  font-size: 0.68rem;
  font-weight: 900;
  letter-spacing: 0.16em;
  margin-bottom: 4px;
}

.cos-icon-btn {
  border: 1px solid var(--border);
  background: var(--bg-4);
  color: var(--text-2);
  border-radius: 7px;
  padding: 8px 10px;
  font: inherit;
  font-size: 0.72rem;
  font-weight: 800;
  cursor: pointer;
  white-space: nowrap;
}

.cos-icon-btn:hover {
  color: var(--text);
  border-color: var(--border-hover);
}

.cos-form {
  height: calc(100vh - 280px);
  min-height: 620px;
  overflow: auto;
  padding: 12px;
}

.cos-group {
  border: 1px solid var(--border);
  border-radius: 8px;
  margin-bottom: 10px;
  background: rgba(255,255,255,0.025);
}

.cos-group summary {
  list-style: none;
  padding: 12px 13px;
  color: var(--text);
  font-size: 0.78rem;
  font-weight: 900;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  cursor: pointer;
}

.cos-group summary::-webkit-details-marker {
  display: none;
}

.cos-group label {
  display: grid;
  gap: 6px;
  padding: 0 13px 12px;
  color: var(--text-3);
  font-size: 0.72rem;
  font-weight: 700;
}

.cos-group input,
.cos-group textarea,
.cos-group select {
  width: 100%;
  border: 1px solid var(--border);
  border-radius: 7px;
  background: var(--bg);
  color: var(--text);
  padding: 10px 11px;
  font: inherit;
  font-size: 0.82rem;
  outline: none;
}

.cos-group textarea {
  resize: vertical;
}

.cos-group input:focus,
.cos-group textarea:focus,
.cos-group select:focus {
  border-color: var(--red);
}

.cos-grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0 8px;
}

.cos-upload {
  margin: 0 13px 12px;
  min-height: 72px;
  border: 1px dashed var(--border-hover);
  border-radius: 8px;
  place-items: center;
  text-align: center;
  cursor: pointer;
}

.cos-upload input {
  display: none;
}

.cos-upload span {
  color: var(--text-2);
  font-size: 0.78rem;
}

.cos-upload-list {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  padding: 0 13px 12px;
}

.cos-thumb-wrap {
  position: relative;
  width: 52px;
  height: 52px;
  flex: 0 0 52px;
}

.cos-thumb {
  width: 52px;
  height: 52px;
  border: 1px solid var(--border);
  border-radius: 8px;
  object-fit: cover;
  background: var(--bg);
  display: block;
}

.cos-thumb-remove {
  position: absolute;
  top: -6px;
  right: -6px;
  width: 20px;
  height: 20px;
  border: 1px solid rgba(255,255,255,0.22);
  border-radius: 50%;
  background: var(--red);
  color: #fff;
  font: inherit;
  font-size: 14px;
  font-weight: 900;
  line-height: 1;
  cursor: pointer;
  display: grid;
  place-items: center;
}

.cos-generate {
  position: sticky;
  bottom: 0;
  width: 100%;
  border: 0;
  border-radius: 8px;
  padding: 14px;
  background: linear-gradient(135deg, var(--red), #7c3aed);
  color: #fff;
  font: inherit;
  font-weight: 900;
  cursor: pointer;
  box-shadow: var(--shadow-red);
}

.cos-generate:disabled {
  cursor: wait;
  opacity: 0.72;
}

.cos-icon-btn:disabled {
  cursor: wait;
  opacity: 0.64;
}

.cos-output,
.cos-visual-list {
  max-height: calc(100vh - 280px);
  min-height: 360px;
  overflow: auto;
  padding: 14px;
}

.cos-empty,
.cos-section,
.cos-visual-card {
  border: 1px solid var(--border);
  border-radius: 8px;
  background: rgba(255,255,255,0.03);
}

.cos-empty {
  min-height: 280px;
  display: grid;
  place-items: center;
  align-content: center;
  text-align: center;
  padding: 28px;
}

.cos-empty span {
  color: var(--red);
  font-size: 0.75rem;
  font-weight: 900;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.cos-empty p {
  color: var(--text-3);
  max-width: 420px;
  margin-top: 10px;
}

.cos-section {
  padding: 16px;
  margin-bottom: 12px;
}

.cos-section__label {
  color: #a78bfa;
  font-size: 0.68rem;
  font-weight: 900;
  letter-spacing: 0.13em;
  text-transform: uppercase;
  margin-bottom: 8px;
}

.cos-section h3 {
  font-size: clamp(1.15rem, 2vw, 1.8rem);
  line-height: 1.22;
  margin-bottom: 8px;
}

.cos-prompt-box {
  padding: 14px;
  border-top: 1px solid var(--border);
}

.cos-prompt-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 10px;
}

.cos-prompt-head span {
  color: var(--text);
  font-size: 0.78rem;
  font-weight: 900;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.cos-prompt-box textarea {
  width: 100%;
  min-height: 180px;
  resize: vertical;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--bg);
  color: var(--text-2);
  padding: 12px;
  font: 500 0.78rem/1.6 var(--ff-body);
  outline: none;
}

.cos-prompt-box textarea:focus {
  border-color: var(--red);
}

.cos-section p,
.cos-section li {
  color: var(--text-2);
  font-size: 0.92rem;
}

.cos-section ul {
  display: grid;
  gap: 9px;
  padding-left: 18px;
}

.cos-note {
  margin-top: 10px;
  padding: 10px;
  border-left: 3px solid var(--red);
  background: rgba(230,48,34,0.08);
  color: var(--text-3);
  font-size: 0.78rem;
}

.cos-copy-ghost {
  position: fixed;
  right: 24px;
  bottom: 24px;
  z-index: 1000;
  border-radius: 8px;
  background: var(--red);
  color: #fff;
  padding: 10px 14px;
  font-size: 0.78rem;
  font-weight: 900;
  box-shadow: var(--shadow-red);
}

.cos-brand-strip {
  padding: 12px 14px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  border-bottom: 1px solid var(--border);
  color: var(--text-3);
  font-size: 0.72rem;
  font-weight: 900;
  text-transform: uppercase;
}

.cos-swatches {
  display: flex;
  gap: 6px;
}

.cos-swatch {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  border: 1px solid rgba(255,255,255,0.28);
}

.cos-visual-list {
  display: grid;
  gap: 12px;
  align-content: start;
  min-height: 574px;
}

.cos-visual-card {
  min-height: 260px;
  padding: 18px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  background:
    linear-gradient(135deg, color-mix(in srgb, var(--visual-color, var(--red)) 28%, transparent), transparent 52%),
    var(--bg-3);
  aspect-ratio: var(--visual-ratio, 1 / 1);
}

.cos-visual-card.has-ai-image {
  aspect-ratio: auto;
  min-height: auto;
  gap: 12px;
}

.cos-ai-image {
  width: 100%;
  border-radius: 8px;
  border: 1px solid var(--border);
  object-fit: cover;
  aspect-ratio: var(--visual-ratio, 1 / 1);
}

.cos-visual-card span {
  color: var(--visual-color, var(--red));
  font-size: 0.68rem;
  font-weight: 900;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.cos-visual-card strong {
  display: block;
  font-family: var(--ff-display);
  font-size: clamp(1.55rem, 3vw, 2.4rem);
  line-height: 1.05;
  color: var(--text);
}

.cos-visual-card p {
  color: var(--text-2);
  font-size: 0.84rem;
}

.cos-image-note {
  display: grid;
  gap: 8px;
}

.cos-image-note textarea {
  width: 100%;
  min-height: 74px;
  resize: vertical;
  border: 1px solid var(--border);
  border-radius: 7px;
  background: rgba(10,10,11,0.74);
  color: var(--text);
  padding: 10px;
  font: inherit;
  font-size: 0.78rem;
  outline: none;
}

.cos-image-note textarea:focus {
  border-color: var(--red);
}

.cos-image-actions {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.cos-visual-card.is-empty {
  justify-content: center;
  gap: 14px;
}

@media (max-width: 1180px) {
  .cos-workspace {
    grid-template-columns: 1fr;
  }

  .cos-panel,
  .cos-form,
  .cos-output,
  .cos-visual-list {
    min-height: 0;
    height: auto;
    max-height: none;
  }
}

@media (max-width: 760px) {
  .cos-shell {
    padding: 92px 12px 18px;
  }

  .cos-topbar {
    align-items: start;
    flex-direction: column;
  }

  .cos-dev-notice {
    align-items: start;
    flex-direction: column;
  }

  .cos-flow {
    justify-content: flex-start;
  }

  .cos-grid-2 {
    grid-template-columns: 1fr;
  }

  .cos-panel__head {
    align-items: start;
    flex-direction: column;
  }
}