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

:root {
  --ld-purple: #405BFF;
  --ld-dark: #1a1a2e;
  --ld-light: #f4f5ff;
  --on: #16a34a;
  --off: #94a3b8;
  --warn: #d97706;
  --radius: 10px;
  --shadow: 0 2px 12px rgba(0,0,0,.08);
}

body { font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif; background: var(--ld-light); color: #1e293b; min-height: 100vh; }

#app { max-width: 900px; margin: 0 auto; padding: 24px 16px; }

header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 28px; }
.logo { display: flex; align-items: center; gap: 10px; }
.ld-icon { font-size: 2rem; }
h1 { font-size: 1.5rem; font-weight: 700; color: var(--ld-dark); }
h2 { font-size: 1.1rem; font-weight: 600; margin-bottom: 14px; }

.badge { font-size: .75rem; font-weight: 600; padding: 4px 12px; border-radius: 999px; }
.badge-connected { background: #dcfce7; color: var(--on); }
.badge-disconnected { background: #f1f5f9; color: var(--off); }

.config-panel, .flags-section, .demo-section {
  background: #fff; border-radius: var(--radius); padding: 24px; margin-bottom: 20px; box-shadow: var(--shadow);
}

.form-row { display: flex; flex-direction: column; gap: 4px; margin-bottom: 12px; }
label { font-size: .8rem; font-weight: 600; color: #64748b; }
input { border: 1px solid #e2e8f0; border-radius: 6px; padding: 8px 12px; font-size: .9rem; outline: none; transition: border .2s; }
input:focus { border-color: var(--ld-purple); }
.hint { font-size: .75rem; color: #94a3b8; }

button { background: var(--ld-purple); color: #fff; border: none; border-radius: 6px; padding: 9px 20px; font-size: .9rem; font-weight: 600; cursor: pointer; transition: opacity .2s; }
button:hover { opacity: .88; }

.info-box { border-radius: var(--radius); padding: 14px 18px; margin-bottom: 20px; font-size: .88rem; }
.warning { background: #fffbeb; border: 1px solid #fde68a; color: #92400e; }
code { background: #f1f5f9; padding: 1px 5px; border-radius: 4px; font-size: .85em; }

.flags-header { display: flex; justify-content: space-between; align-items: baseline; }
.flags-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(190px, 1fr)); gap: 12px; }

.flag-card { border: 1px solid #e2e8f0; border-radius: 8px; padding: 14px; transition: border .2s; }
.flag-card.on  { border-color: var(--on);  background: #f0fdf4; }
.flag-card.off { border-color: #e2e8f0; }
.flag-card.mocked { opacity: .6; }

.flag-key { font-size: .8rem; font-weight: 700; word-break: break-all; margin-bottom: 8px; color: #334155; }
.flag-toggle { display: flex; align-items: center; gap: 8px; }
.toggle-pill { display: inline-block; padding: 2px 10px; border-radius: 999px; font-size: .75rem; font-weight: 700; }
.toggle-pill.on  { background: #dcfce7; color: var(--on); }
.toggle-pill.off { background: #f1f5f9; color: var(--off); }
.flag-value { font-size: .75rem; color: #64748b; word-break: break-all; }

.loading { color: #94a3b8; font-size: .9rem; }

/* preview */
.preview-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); gap: 14px; }
.preview-card { border: 1px solid #e2e8f0; border-radius: 8px; padding: 16px; transition: all .3s; }
.preview-card.active { border-color: var(--ld-purple); background: var(--ld-light); }
.preview-label { font-size: .72rem; font-weight: 700; text-transform: uppercase; color: var(--ld-purple); margin-bottom: 8px; }
.preview-off, .preview-on { font-size: .88rem; color: #475569; }
.preview-card .preview-on { display: none; font-weight: 600; color: var(--ld-purple); }
.preview-card.active .preview-off { display: none; }
.preview-card.active .preview-on { display: block; }

@media (max-width: 520px) {
  header { flex-direction: column; align-items: flex-start; gap: 8px; }
}