/* ===== Reset & Base ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg: #0f1117;
  --surface: #1a1d27;
  --surface-hover: #242836;
  --border: #2e3348;
  --text: #e4e4e7;
  --text-muted: #8b8fa3;
  --accent: #3b82f6;
  --accent-hover: #2563eb;
  --success: #22c55e;
  --warning: #f59e0b;
  --danger: #ef4444;
  --radius: 8px;
}

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

/* ===== Layout ===== */
.layout {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  max-width: 960px;
  margin: 0 auto;
  padding: 0 24px;
}

.header {
  padding: 20px 0;
  border-bottom: 1px solid var(--border);
}

.logo {
  font-size: 18px;
  font-weight: 700;
  color: var(--text);
  text-decoration: none;
}

.main {
  flex: 1;
  padding: 32px 0;
}

.footer {
  padding: 20px 0;
  border-top: 1px solid var(--border);
  color: var(--text-muted);
  font-size: 13px;
}

h1 { font-size: 24px; font-weight: 700; }
.subtitle { color: var(--text-muted); margin-top: 4px; margin-bottom: 24px; }

/* ===== Tool Grid (Dashboard) ===== */
.tool-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 16px;
}

.tool-card {
  display: block;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  text-decoration: none;
  color: var(--text);
  transition: background 0.15s, border-color 0.15s;
}
.tool-card:hover {
  background: var(--surface-hover);
  border-color: var(--accent);
}
.tool-icon { font-size: 32px; display: block; margin-bottom: 12px; }
.tool-card h3 { font-size: 16px; margin-bottom: 6px; }
.tool-card p { font-size: 13px; color: var(--text-muted); }

/* ===== Form Components (Shared) ===== */
.form-group { margin-bottom: 20px; }
.form-group label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 6px;
  color: var(--text-muted);
}
.form-group input, .form-group select {
  width: 100%;
  padding: 10px 14px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  font-size: 14px;
  outline: none;
}
.form-group input:focus, .form-group select:focus {
  border-color: var(--accent);
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 10px 20px;
  border: none;
  border-radius: var(--radius);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.15s;
}
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-hover); }
.btn-primary:disabled { opacity: 0.5; cursor: not-allowed; }

.btn-danger { background: var(--danger); color: #fff; }
.btn-danger:hover { background: #dc2626; }

/* ===== Progress ===== */
.progress-wrap {
  margin-top: 24px;
  display: none;
}
.progress-wrap.active { display: block; }

.progress-bar-outer {
  width: 100%;
  height: 8px;
  background: var(--surface);
  border-radius: 4px;
  overflow: hidden;
}
.progress-bar-inner {
  height: 100%;
  background: var(--accent);
  border-radius: 4px;
  transition: width 0.3s;
  width: 0%;
}
.progress-text {
  font-size: 13px;
  color: var(--text-muted);
  margin-top: 8px;
}

/* ===== Log ===== */
.log-panel {
  margin-top: 16px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
  max-height: 300px;
  overflow-y: auto;
  font-family: 'Fira Code', 'Consolas', monospace;
  font-size: 12px;
  line-height: 1.8;
}
.log-panel .log-line { color: var(--text-muted); }
.log-panel .log-line.success { color: var(--success); }
.log-panel .log-line.error { color: var(--danger); }
.log-panel .log-line.warn { color: var(--warning); }

/* ===== Alerts ===== */
.alert {
  padding: 12px 16px;
  border-radius: var(--radius);
  font-size: 13px;
  margin-bottom: 16px;
}
.alert-success { background: #052e16; border: 1px solid #166534; color: var(--success); }
.alert-danger { background: #2d0a0a; border: 1px solid #7f1d1d; color: var(--danger); }

/* ===== Dataset selector ===== */
.chip-group { display: flex; gap: 8px; flex-wrap: wrap; }
.chip {
  padding: 6px 14px;
  border: 1px solid var(--border);
  border-radius: 20px;
  font-size: 13px;
  cursor: pointer;
  background: var(--surface);
  color: var(--text-muted);
  transition: all 0.15s;
}
.chip.active { border-color: var(--accent); color: var(--accent); background: rgba(59,130,246,0.1); }