:root {
  --bg: #0f1117;
  --surface: #1a1d27;
  --surface-light: #252836;
  --primary: #4f8cff;
  --primary-hover: #3a7bf0;
  --text: #e4e6ed;
  --text-dim: #8b8fa3;
  --danger: #ef4444;
  --success: #22c55e;
  --warning: #f59e0b;
  --border: #2a2d3a;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
}

.hidden { display: none !important; }

/* Login */
.screen#login-screen {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
}

.login-card {
  background: var(--surface);
  padding: 40px;
  border-radius: 12px;
  width: 360px;
  text-align: center;
}

.login-card h1 {
  font-size: 1.6rem;
  margin-bottom: 24px;
  color: var(--primary);
}

.login-card input {
  width: 100%;
  padding: 12px 16px;
  margin-bottom: 12px;
  background: var(--surface-light);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text);
  font-size: 1rem;
}

.login-card button {
  width: 100%;
  padding: 12px;
  background: var(--primary);
  border: none;
  border-radius: 8px;
  color: #fff;
  font-size: 1rem;
  cursor: pointer;
  transition: background 0.2s;
}

.login-card button:hover { background: var(--primary-hover); }

.error-msg { color: var(--danger); margin-top: 12px; font-size: 0.9rem; }

/* Layout */
#app-screen {
  display: flex;
  min-height: 100vh;
}

.sidebar {
  width: 220px;
  background: var(--surface);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  padding: 20px 0;
}

.sidebar h2 {
  font-size: 1.3rem;
  color: var(--primary);
  padding: 0 20px 20px;
  border-bottom: 1px solid var(--border);
}

.sidebar ul { list-style: none; flex: 1; padding: 12px 0; }

.sidebar li {
  padding: 10px 20px;
  cursor: pointer;
  color: var(--text-dim);
  transition: all 0.2s;
  font-size: 0.95rem;
}

.sidebar li:hover { background: var(--surface-light); color: var(--text); }
.sidebar li.active { background: var(--primary); color: #fff; }

#logout-btn {
  margin: 0 20px;
  padding: 10px;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text-dim);
  cursor: pointer;
  transition: all 0.2s;
}
#logout-btn:hover { border-color: var(--danger); color: var(--danger); }

.content { flex: 1; padding: 24px; overflow-y: auto; }

/* Tabs */
.tab-content { display: none; }
.tab-content.active { display: block; }

/* Cards */
.cards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 16px;
  margin-top: 20px;
}

.card {
  background: var(--surface);
  border-radius: 12px;
  padding: 24px;
  text-align: center;
}

.card-num { display: block; font-size: 2rem; font-weight: 700; color: var(--primary); }
.card-label { display: block; margin-top: 8px; color: var(--text-dim); font-size: 0.9rem; }

/* Tables */
table { width: 100%; border-collapse: collapse; margin-top: 16px; }
th { text-align: left; padding: 12px; border-bottom: 2px solid var(--border); color: var(--text-dim); font-size: 0.85rem; text-transform: uppercase; }
td { padding: 12px; border-bottom: 1px solid var(--border); font-size: 0.9rem; }
tr:hover { background: var(--surface); }

/* Buttons */
.btn-primary, .btn-secondary {
  padding: 10px 20px;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  font-size: 0.9rem;
  transition: opacity 0.2s;
}
.btn-primary { background: var(--primary); color: #fff; }
.btn-secondary { background: var(--surface-light); color: var(--text); border: 1px solid var(--border); }
.btn-primary:hover, .btn-secondary:hover { opacity: 0.85; }

/* Conversation layout */
.conv-layout { display: flex; gap: 16px; margin-top: 16px; }
.conv-list { width: 280px; background: var(--surface); border-radius: 8px; overflow-y: auto; max-height: 70vh; }
.conv-list .conv-item { padding: 12px 16px; border-bottom: 1px solid var(--border); cursor: pointer; }
.conv-list .conv-item:hover { background: var(--surface-light); }
.conv-list .conv-item.active { background: var(--primary); }
.conv-detail { flex: 1; background: var(--surface); border-radius: 8px; padding: 20px; max-height: 70vh; overflow-y: auto; }

.placeholder { color: var(--text-dim); text-align: center; margin-top: 40px; }

/* Messages */
.msg { margin-bottom: 12px; max-width: 80%; }
.msg.user { text-align: left; }
.msg.assistant { text-align: right; margin-left: auto; }
.msg-bubble { display: inline-block; padding: 8px 14px; border-radius: 12px; font-size: 0.9rem; }
.msg.user .msg-bubble { background: var(--surface-light); }
.msg.assistant .msg-bubble { background: var(--primary); color: #fff; }

/* Workflow editor */
.wf-editor {
  width: 100%;
  min-height: 500px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 16px;
  color: var(--text);
  font-family: "Fira Code", monospace;
  font-size: 0.9rem;
  resize: vertical;
}

.workflow-toolbar { margin-bottom: 16px; display: flex; gap: 12px; }

/* Config */
.config-section { margin-bottom: 20px; }
.config-section label { display: block; margin-bottom: 8px; color: var(--text-dim); font-size: 0.9rem; }
.config-section input, .config-section textarea {
  width: 100%;
  padding: 10px 14px;
  background: var(--surface-light);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text);
  font-size: 0.95rem;
}

/* Status badges */
.badge { display: inline-block; padding: 2px 10px; border-radius: 12px; font-size: 0.8rem; }
.badge-pending { background: rgba(245,158,11,0.2); color: var(--warning); }
.badge-confirmed { background: rgba(34,197,94,0.2); color: var(--success); }
.badge-cancelled { background: rgba(239,68,68,0.2); color: var(--danger); }