:root {
  --bg: #f3f4ef;
  --card: rgba(255, 255, 255, 0.98);
  --ink: #1f2a1f;
  --muted: #5d665d;
  --line: #d9dfd5;
  --brand: #1f5f3b;
  --brand-soft: #d8eadf;
  --brand-soft-2: #edf5ef;
  --blue: #2f68b0;
  --shadow: 0 18px 38px rgba(18, 32, 21, 0.08);
  --radius-lg: 14px;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  color: var(--ink);
  background:
    radial-gradient(circle at top right, rgba(31, 95, 59, 0.11), transparent 24%),
    linear-gradient(180deg, #f7f8f4 0%, var(--bg) 100%);
}

button, input, textarea, select { font: inherit; }
button, .button-secondary {
  border-radius: 10px;
  padding: 11px 15px;
  font-weight: 600;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 140ms ease, box-shadow 140ms ease, background-color 140ms ease;
}
button:hover, .button-secondary:hover { transform: translateY(-1px); }
button { background: var(--brand); color: #fff; }
.button-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--brand-soft-2);
  color: var(--brand);
  border-color: var(--line);
  text-decoration: none;
}
button:disabled { opacity: .55; cursor: not-allowed; transform: none; }

input, textarea, select {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 12px 14px;
  background: #fff;
  color: var(--ink);
}
textarea { resize: vertical; min-height: 92px; }

.page-shell { max-width: 1780px; margin: 0 auto; padding: 22px 18px 36px; }
.hero-card, .metric-card, .surface-card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
}
.hero-card {
  padding: 22px 24px;
  display: flex;
  justify-content: space-between;
  gap: 18px;
  align-items: flex-start;
}
.hero-copy { max-width: 980px; }
.eyebrow {
  margin: 0 0 6px;
  color: var(--brand);
  font-size: .82rem;
  letter-spacing: .08em;
  text-transform: uppercase;
  font-weight: 700;
}
h1, h2, p { margin: 0; }
h1 { font-size: clamp(1.9rem, 2vw, 2.45rem); }
h2 { font-size: 1.2rem; }
.hero-note, .muted, .metric-label, .metric-note, .field span { color: var(--muted); }
.hero-note { margin-top: 10px; max-width: 920px; line-height: 1.55; }

.hero-actions, .inline-actions, .composer-actions, .file-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}
.hero-actions { justify-content: flex-end; }

.metrics-grid, .workspace-grid, .config-grid, .assets-grid, .library-grid {
  display: grid;
  gap: 14px;
}
.metrics-grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
  margin-top: 18px;
}
.metric-card {
  padding: 16px 18px;
  min-height: 118px;
  display: grid;
  gap: 8px;
  align-content: start;
}
.metric-value { font-size: 1.42rem; line-height: 1.15; }

.tabs-nav {
  margin-top: 18px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}
.tab-button {
  background: rgba(255, 255, 255, 0.78);
  color: var(--muted);
  border-color: var(--line);
}
.tab-button.is-active {
  background: var(--brand);
  color: #fff;
  box-shadow: 0 10px 22px rgba(31, 95, 59, 0.16);
}
.tab-panel { display: none; margin-top: 18px; }
.tab-panel.is-active { display: block; }

.workspace-grid {
  grid-template-columns: minmax(320px, .95fr) minmax(560px, 1.22fr) minmax(320px, .92fr);
  align-items: start;
}
.assets-grid { grid-template-columns: minmax(340px, .8fr) minmax(0, 1.2fr); }

.surface-card { padding: 18px; }
.surface-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 12px;
  margin-bottom: 16px;
}
.field {
  display: grid;
  gap: 6px;
  margin-bottom: 12px;
}
.config-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.checkbox-list {
  display: grid;
  gap: 8px;
  margin-bottom: 12px;
  color: var(--muted);
}
.checkbox-list label { display: flex; gap: 10px; align-items: center; }

.chat-messages {
  min-height: 280px;
  max-height: 560px;
  overflow: auto;
  display: grid;
  gap: 12px;
  margin-bottom: 16px;
}
.message {
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 14px 16px;
  background: #fff;
}
.message.user { background: #f4fbf6; border-color: #cfe4d5; }
.message.assistant { background: #fbfcff; border-color: #d7e2f3; }
.message-meta {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 6px;
  color: var(--muted);
  font-size: .84rem;
}
.message-body { white-space: pre-wrap; line-height: 1.55; }

.current-stage-card, .soft-block, .details-box {
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 14px;
  background: #fbfcfa;
  margin-bottom: 14px;
}
.soft-head {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: baseline;
  margin-bottom: 10px;
}
.stage-preview {
  border: 1px dashed var(--line);
  border-radius: 14px;
  min-height: 240px;
  display: grid;
  place-items: center;
  background: linear-gradient(180deg, rgba(255,255,255,.9), rgba(243,246,242,.9));
  overflow: hidden;
}
.stage-preview img, .asset-card img, .history-card img, .asset-mini img {
  max-width: 100%;
  display: block;
}
.empty-state { color: var(--muted); text-align: center; padding: 24px; }
.details-box summary { cursor: pointer; font-weight: 600; }
.details-box pre {
  white-space: pre-wrap;
  word-break: break-word;
  margin: 12px 0 0;
  font-size: .9rem;
}

.pipeline-list, .history-list, .assets-list, .asset-mini-list {
  display: grid;
  gap: 12px;
}
.pipeline-item, .asset-card, .history-card, .library-card, .asset-mini {
  border: 1px solid var(--line);
  border-radius: 14px;
  background: #fff;
}
.pipeline-item {
  padding: 14px;
  display: grid;
  gap: 8px;
  cursor: pointer;
}
.pipeline-item.is-selected { border-color: var(--brand); box-shadow: 0 10px 24px rgba(31,95,59,.1); }
.pipeline-item.is-current { background: #f4fbf6; }
.pipeline-top, .asset-top, .history-top {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: start;
}
.pill {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 999px;
  padding: 6px 10px;
  background: #edf5ef;
  color: var(--brand);
  font-size: .82rem;
  font-weight: 700;
}

.composer { margin-top: 8px; }
.attachment-chip {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 12px;
}
.attachment-chip-item {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 10px;
  border-radius: 999px;
  background: #eef4fb;
  color: var(--blue);
  font-size: .88rem;
}
.attachment-chip.is-hidden { display: none; }

.asset-card, .history-card, .library-card { padding: 14px; }
.asset-card-grid, .history-card-grid {
  display: grid;
  grid-template-columns: 130px minmax(0, 1fr);
  gap: 12px;
  align-items: start;
}
.asset-thumb, .history-thumb, .asset-mini-thumb {
  border-radius: 12px;
  overflow: hidden;
  background: #f0f3ee;
  border: 1px solid var(--line);
}
.asset-mini {
  padding: 10px;
  display: grid;
  grid-template-columns: 62px minmax(0, 1fr);
  gap: 10px;
  align-items: center;
}

.library-grid {
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
}
.library-card {
  display: grid;
  gap: 8px;
  cursor: pointer;
}
.library-card.is-selected { border-color: var(--brand); box-shadow: 0 10px 24px rgba(31,95,59,.1); }

.toast {
  position: fixed;
  right: 20px;
  bottom: 20px;
  background: #173f28;
  color: #fff;
  padding: 12px 14px;
  border-radius: 12px;
  box-shadow: 0 18px 38px rgba(18,32,21,.22);
  max-width: 360px;
  z-index: 30;
}
.toast.is-hidden { display: none; }

@media (max-width: 1280px) {
  .workspace-grid, .assets-grid, .metrics-grid { grid-template-columns: 1fr; }
}