:root {
  --bg: #0f1117;
  --bg-card: #1a1d27;
  --bg-input: #232633;
  --border: #2d3148;
  --text: #e1e4ed;
  --text-dim: #8b8fa7;
  --accent: #6366f1;
  --accent-hover: #818cf8;
  --danger: #ef4444;
  --success: #22c55e;
  --warning: #f59e0b;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

main { flex: 1; max-width: 960px; margin: 0 auto; padding: 2rem 1rem; width: 100%; }

a { color: var(--accent); text-decoration: none; }
a:hover { color: var(--accent-hover); }

/* Nav */
nav { background: var(--bg-card); border-bottom: 1px solid var(--border); }
.nav-inner { max-width: 960px; margin: 0 auto; padding: 0.75rem 1rem; display: flex; align-items: center; justify-content: space-between; }
.nav-brand { color: var(--text); font-weight: 700; font-size: 1.1rem; }
.nav-links { display: flex; align-items: center; gap: 1.25rem; }
.nav-links a { color: var(--text-dim); font-size: 0.9rem; }
.nav-links a:hover { color: var(--text); }
.credits { color: var(--text-dim); font-size: 0.85rem; }
.btn-link { background: none; border: none; color: var(--text-dim); cursor: pointer; font-size: 0.9rem; }
.btn-link:hover { color: var(--text); }

/* Buttons */
.btn {
  display: inline-block; padding: 0.5rem 1rem; border-radius: 6px; font-size: 0.9rem;
  border: 1px solid var(--border); cursor: pointer; text-align: center; transition: all 0.15s;
  background: var(--bg-card); color: var(--text);
}
.btn:hover { border-color: var(--text-dim); }
.btn-primary { background: var(--accent); border-color: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-hover); border-color: var(--accent-hover); color: #fff; }
.btn-secondary { background: transparent; }
.btn-danger { background: transparent; border-color: var(--danger); color: var(--danger); }
.btn-danger:hover { background: var(--danger); color: #fff; }
.btn-sm { padding: 0.25rem 0.5rem; font-size: 0.8rem; }
.btn-lg { padding: 0.75rem 1.5rem; font-size: 1rem; }

/* Hero */
.hero { text-align: center; padding: 4rem 0 3rem; }
.hero h1 { font-size: 2.2rem; margin-bottom: 1rem; }
.hero p { color: var(--text-dim); font-size: 1.1rem; margin-bottom: 2rem; }
.hero-actions { display: flex; gap: 1rem; justify-content: center; }

/* Features */
.features { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 1.5rem; margin-top: 2rem; }
.feature { background: var(--bg-card); border: 1px solid var(--border); border-radius: 8px; padding: 1.5rem; }
.feature h3 { margin-bottom: 0.5rem; }
.feature p { color: var(--text-dim); font-size: 0.9rem; }

/* Auth forms */
.auth-form { max-width: 400px; margin: 2rem auto; }
.auth-form h2 { margin-bottom: 1.5rem; }
.auth-form form { display: flex; flex-direction: column; gap: 1rem; }
.auth-alt { margin-top: 1rem; color: var(--text-dim); font-size: 0.9rem; }

/* Form elements */
label { font-size: 0.9rem; color: var(--text-dim); display: block; margin-bottom: 0.25rem; }
input[type="text"], input[type="email"], input[type="password"], input[type="number"], textarea, select {
  width: 100%; padding: 0.5rem 0.75rem; background: var(--bg-input); border: 1px solid var(--border);
  border-radius: 6px; color: var(--text); font-size: 0.9rem;
}
input:focus, textarea:focus { outline: none; border-color: var(--accent); }
textarea { resize: vertical; font-family: monospace; }

.form-group { margin-bottom: 1rem; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
.radio-group { display: flex; gap: 1rem; }
.radio-group label { display: flex; align-items: center; gap: 0.35rem; color: var(--text); cursor: pointer; }
.checkbox-label { display: flex; align-items: center; gap: 0.5rem; color: var(--text); cursor: pointer; padding-top: 1.5rem; }

/* Error */
.error { color: var(--danger); background: rgba(239,68,68,0.1); border: 1px solid rgba(239,68,68,0.2); padding: 0.75rem; border-radius: 6px; margin-bottom: 1rem; }

/* Tool page */
.tool-page { max-width: 640px; }

/* Designs table */
.designs-table { width: 100%; border-collapse: collapse; }
.designs-table th, .designs-table td { padding: 0.75rem; text-align: left; border-bottom: 1px solid var(--border); }
.designs-table th { color: var(--text-dim); font-size: 0.85rem; text-transform: uppercase; letter-spacing: 0.05em; }

.status { font-size: 0.8rem; padding: 0.15rem 0.5rem; border-radius: 4px; }
.status-pending { background: rgba(245,158,11,0.15); color: var(--warning); }
.status-running { background: rgba(99,102,241,0.15); color: var(--accent); }
.status-completed { background: rgba(34,197,94,0.15); color: var(--success); }
.status-failed { background: rgba(239,68,68,0.15); color: var(--danger); }

/* Design view */
.design-view { }
.design-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 1.5rem; flex-wrap: wrap; gap: 1rem; }
.design-meta { display: flex; align-items: center; gap: 0.75rem; }
.result-output {
  background: var(--bg-card); border: 1px solid var(--border); border-radius: 8px;
  padding: 1rem; font-size: 0.8rem; overflow-x: auto; white-space: pre; line-height: 1.4;
  max-height: 70vh; overflow-y: auto;
}

/* About page */
.about-page h3 { margin-top: 1.5rem; margin-bottom: 0.5rem; }
.about-page ul, .about-page ol { padding-left: 1.5rem; color: var(--text-dim); }
.about-page li { margin-bottom: 0.35rem; }

/* Footer */
footer { border-top: 1px solid var(--border); padding: 1.5rem; text-align: center; color: var(--text-dim); font-size: 0.85rem; }

/* Progress area */
.progress-area {
  display: flex; flex-direction: column; align-items: center; gap: 1rem;
  padding: 3rem 1rem; color: var(--text-dim);
}
.spinner {
  width: 32px; height: 32px; border: 3px solid var(--border);
  border-top-color: var(--accent); border-radius: 50%;
  animation: spin 0.8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* SSE output */
#sse-output {
  background: var(--bg-card); border: 1px solid var(--border); border-radius: 8px;
  padding: 1rem; font-family: monospace; font-size: 0.8rem; white-space: pre;
  overflow-x: auto; max-height: 70vh; overflow-y: auto; line-height: 1.4;
}