:root {
  --bg: #fafafe;
  --bg-white: #ffffff;
  --bg-dark: #0c0a14;
  --ink: #1a1a2e;
  --ink-soft: #4a4660;
  --muted: #7a7490;
  --border: rgba(0,0,0,0.06);
  --accent: #7c3aed;
  --accent-soft: rgba(124,58,237,0.08);
  --cta: #d61f8c;
  --cta-light: #e040fb;
  --success: #10b981;
  --success-soft: rgba(16,185,129,0.08);
  --error: #ef4444;
  --error-soft: rgba(239,68,68,0.06);
  --sans: 'DM Sans', -apple-system, sans-serif;
}

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

body {
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

.hidden { display: none !important; }

/* ═══ NAV ═══ */
.app-nav {
  display: flex; justify-content: space-between; align-items: center;
  padding: 14px 24px;
  border-bottom: 1px solid var(--border);
  background: var(--bg-white);
  position: sticky; top: 0; z-index: 100;
}
.app-nav-brand { font-size: 15px; font-weight: 800; color: var(--ink); }
.app-nav-right { display: flex; gap: 6px; }
.app-nav-link {
  background: none; border: 1px solid var(--border); border-radius: 8px;
  font-family: var(--sans); font-size: 13px; font-weight: 600;
  color: var(--ink-soft); padding: 6px 14px; cursor: pointer;
}
.app-nav-link:hover { color: var(--ink); border-color: rgba(0,0,0,0.12); }

/* ═══ MAIN ═══ */
.app-main { max-width: 700px; margin: 0 auto; padding: 0 20px 60px; }

/* ═══ STEPS ═══ */
.app-step {
  background: var(--bg-white); border: 1px solid var(--border);
  border-radius: 16px; padding: 32px; margin-top: 24px;
}
.step-header { margin-bottom: 24px; }
.step-badge {
  display: inline-block; font-size: 11px; font-weight: 700;
  letter-spacing: 0.08em; text-transform: uppercase;
  color: var(--accent); background: var(--accent-soft);
  padding: 4px 12px; border-radius: 6px; margin-bottom: 10px;
}
.step-header h2 { font-size: 22px; font-weight: 800; color: var(--ink); margin-bottom: 4px; }
.step-header p { font-size: 14px; color: var(--ink-soft); }

/* ═══ FORM FIELDS ═══ */
.step-form { display: flex; flex-direction: column; gap: 16px; }
.field-group { display: flex; flex-direction: column; gap: 4px; }
.field-label { font-size: 13px; font-weight: 700; color: var(--ink); }
.field-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }

input[type="text"], select, textarea {
  width: 100%; padding: 10px 14px; border: 1px solid var(--border);
  border-radius: 8px; font-size: 14px; font-family: var(--sans);
  background: var(--bg); color: var(--ink);
}
input:focus, select:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-soft); }

.checkbox-row { display: flex; gap: 16px; padding-top: 4px; }
.check-label { display: flex; align-items: center; gap: 6px; font-size: 14px; color: var(--ink); cursor: pointer; }
.check-label input { cursor: pointer; }

/* ═══ UPLOAD ═══ */
.upload-zone {
  border: 2px dashed var(--border); border-radius: 14px;
  padding: 40px; text-align: center; cursor: pointer;
  transition: border-color 0.15s, background 0.15s;
}
.upload-zone:hover, .upload-zone.drag-over {
  border-color: var(--accent); background: var(--accent-soft);
}
.upload-icon { font-size: 32px; color: var(--accent); display: block; margin-bottom: 8px; }
.upload-prompt p { font-size: 14px; color: var(--ink-soft); margin: 0; }
.upload-hint { font-size: 12px; color: var(--muted); margin-top: 4px; }

.asset-list { display: flex; flex-direction: column; gap: 8px; margin-top: 16px; }
.asset-row {
  display: flex; align-items: center; gap: 10px;
  padding: 10px 14px; background: var(--bg-white);
  border: 1px solid var(--border); border-radius: 10px;
}
.asset-name { flex: 1; font-size: 13px; font-weight: 600; color: var(--ink); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.asset-role { width: 130px; font-size: 12px; padding: 6px 10px; }
.asset-remove {
  background: none; border: none; font-size: 16px;
  color: var(--muted); cursor: pointer; padding: 4px 8px;
}
.asset-remove:hover { color: var(--error); }

/* ═══ BUTTONS ═══ */
.step-next-btn {
  background: linear-gradient(135deg, var(--cta), var(--cta-light));
  color: #fff; border: none; border-radius: 10px;
  font-family: var(--sans); font-size: 15px; font-weight: 800;
  padding: 14px 28px; cursor: pointer; transition: transform 0.15s;
}
.step-next-btn:hover { transform: translateY(-1px); }
.step-back-btn {
  background: none; border: 1px solid var(--border); border-radius: 10px;
  font-family: var(--sans); font-size: 14px; font-weight: 600;
  color: var(--ink-soft); padding: 10px 20px; cursor: pointer;
}
.step-nav { display: flex; gap: 10px; margin-top: 20px; }

.build-btn {
  width: 100%; padding: 18px; border: none; border-radius: 12px;
  background: linear-gradient(135deg, var(--cta), var(--cta-light));
  color: #fff; font-size: 17px; font-weight: 800;
  font-family: var(--sans); cursor: pointer;
  box-shadow: 0 8px 24px rgba(214,31,140,0.2);
  transition: transform 0.15s;
}
.build-btn:hover { transform: translateY(-2px); }
.build-btn:disabled { opacity: 0.6; cursor: not-allowed; transform: none; }

/* ═══ SUMMARY ═══ */
.build-summary {
  background: var(--bg); border-radius: 12px;
  padding: 16px 20px; margin-bottom: 20px;
}
.summary-row { display: flex; justify-content: space-between; padding: 6px 0; }
.summary-label { font-size: 13px; font-weight: 600; color: var(--muted); }
.summary-value { font-size: 13px; font-weight: 700; color: var(--ink); text-align: right; }

/* ═══ AGENT PROGRESS ═══ */
.agent-progress { margin-top: 24px; }
.agent-list { display: flex; flex-direction: column; gap: 6px; }
.agent-row {
  display: flex; align-items: center; gap: 12px;
  padding: 12px 16px; border-radius: 10px;
  background: var(--bg); transition: background 0.3s;
}
.agent-row.is-active { background: var(--accent-soft); }
.agent-row.is-done { opacity: 0.5; }
.agent-dot {
  width: 10px; height: 10px; border-radius: 50%;
  background: var(--border); flex-shrink: 0;
  transition: background 0.3s;
}
.agent-row.is-active .agent-dot {
  background: var(--accent);
  box-shadow: 0 0 8px rgba(124,58,237,0.4);
  animation: pulse 1.5s infinite;
}
.agent-row.is-done .agent-dot { background: var(--success); }
@keyframes pulse { 0%, 100% { opacity: 1; } 50% { opacity: 0.4; } }
.agent-info { display: flex; flex-direction: column; }
.agent-info strong { font-size: 13px; color: var(--ink); }
.agent-info span { font-size: 12px; color: var(--muted); }
.agent-row.is-active .agent-info strong { color: var(--accent); }
.agent-row.is-done .agent-info strong { color: var(--success); }
.agent-status-text { font-size: 13px; color: var(--muted); text-align: center; margin-top: 12px; }

/* ═══ RESULTS ═══ */
.result-section { margin-top: 24px; }
.result-card {
  background: var(--bg-white); border: 2px solid var(--success);
  border-radius: 14px; padding: 28px; text-align: center;
}
.result-icon { font-size: 36px; color: var(--success); margin-bottom: 12px; }
.result-card h3 { font-size: 18px; font-weight: 800; color: var(--ink); margin-bottom: 16px; }
.result-card h4 { font-size: 14px; font-weight: 700; color: var(--ink); margin: 16px 0 8px; text-align: left; }
.result-card ol, .result-card ul { text-align: left; padding-left: 20px; font-size: 14px; color: var(--ink-soft); }
.result-card p { text-align: left; font-size: 14px; color: var(--ink-soft); line-height: 1.6; }
.result-links { display: flex; gap: 10px; justify-content: center; margin-top: 16px; }
.primary-link {
  display: inline-block; background: linear-gradient(135deg, var(--cta), var(--cta-light));
  color: #fff; font-size: 14px; font-weight: 700;
  padding: 12px 24px; border-radius: 10px; text-decoration: none;
}

/* ═══ ERROR ═══ */
.error-section { margin-top: 24px; }
.error-section p {
  background: var(--error-soft); color: var(--error);
  padding: 14px 18px; border-radius: 10px; font-size: 14px;
  margin-bottom: 12px;
}

/* ═══ HISTORY ═══ */
.app-section { margin-top: 32px; }
.section-title h2 { font-size: 18px; font-weight: 800; color: var(--ink); margin-bottom: 4px; }
.section-title p { font-size: 13px; color: var(--muted); margin-bottom: 16px; }
.runs-list { display: flex; flex-direction: column; gap: 10px; max-height: 400px; overflow-y: auto; }
.empty-state {
  padding: 20px; border: 1px dashed var(--border); border-radius: 12px;
  color: var(--muted); font-size: 14px; text-align: center;
}

/* ═══ RESPONSIVE ═══ */
@media (max-width: 640px) {
  .app-step { padding: 24px 18px; }
  .field-row { grid-template-columns: 1fr; }
  .step-nav { flex-direction: column; }
}