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

:root {
  --bg: #f5f4f0;
  --surface: #ffffff;
  --surface2: #f0efe9;
  --border: rgba(0,0,0,0.08);
  --border-med: rgba(0,0,0,0.14);
  --text: #1a1a18;
  --text-2: #6b6b65;
  --text-3: #a0a09a;
  --accent: #1a1a18;
  --green-bg: #e4f0e0;   --green-text: #2a5e28;
  --amber-bg: #fdf0da;   --amber-text: #7a4d10;
  --blue-bg: #e4eef9;    --blue-text: #1a3d6b;
  --red-bg: #fce8e8;     --red-text: #7a1f1f;
  --purple-bg: #eeecfd;  --purple-text: #3b3190;
  --radius: 10px;
  --radius-sm: 6px;
}

body {
  font-family: 'DM Sans', sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  font-size: 14px;
  line-height: 1.5;
}

.shell { display: flex; flex-direction: column; min-height: 100vh; }

.topbar {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  padding: 0 24px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: sticky;
  top: 0;
  z-index: 100;
}
.brand { display: flex; align-items: center; gap: 10px; }
.brand-icon {
  width: 32px; height: 32px; border-radius: var(--radius-sm);
  background: var(--accent); color: #fff;
  display: flex; align-items: center; justify-content: center;
  font-size: 13px; font-weight: 500;
  font-family: 'DM Mono', monospace;
}
.brand-name { font-size: 15px; font-weight: 500; }
.brand-handle { font-size: 11px; color: var(--text-2); }
.user-pill { display: flex; align-items: center; gap: 8px; font-size: 13px; color: var(--text-2); }
.avatar {
  width: 30px; height: 30px; border-radius: 50%;
  background: var(--purple-bg); color: var(--purple-text);
  display: flex; align-items: center; justify-content: center;
  font-size: 12px; font-weight: 500;
}

.tabs-bar {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  padding: 0 24px;
  display: flex;
  gap: 2px;
  overflow-x: auto;
}
.tabs-bar::-webkit-scrollbar { display: none; }
.tab-btn {
  display: flex; align-items: center; gap: 6px;
  font-size: 13px; color: var(--text-2);
  padding: 12px 14px;
  border: none; background: none; cursor: pointer;
  border-bottom: 2px solid transparent;
  white-space: nowrap;
  font-family: 'DM Sans', sans-serif;
  transition: color 0.15s;
}
.tab-btn:hover { color: var(--text); }
.tab-btn.active { color: var(--text); border-bottom-color: var(--text); font-weight: 500; }
.tab-btn i { font-size: 15px; }

.main { flex: 1; padding: 24px; max-width: 960px; margin: 0 auto; width: 100%; }

.section { display: none; }
.section.active { display: block; }

.metrics { display: grid; grid-template-columns: repeat(4, 1fr); gap: 10px; margin-bottom: 20px; }
.metric {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 16px;
}
.metric-label { font-size: 11px; color: var(--text-2); text-transform: uppercase; letter-spacing: 0.05em; margin-bottom: 6px; }
.metric-value { font-size: 26px; font-weight: 500; font-family: 'DM Mono', monospace; }
.metric-sub { font-size: 11px; color: var(--text-3); margin-top: 3px; }

.two-col { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }

@media (max-width: 700px) {
  .metrics { grid-template-columns: repeat(2, 1fr); }
  .two-col { grid-template-columns: 1fr; }
  .pipeline { grid-template-columns: repeat(2, 1fr); }
  .client-grid { grid-template-columns: 1fr; }
}
@media (max-width: 560px) {
  .form-grid { grid-template-columns: 1fr; }
  .msg-grid { grid-template-columns: 1fr; }
}