:root {
  color-scheme: light dark;
  --bg: #0f172a;
  --panel: rgba(15, 23, 42, 0.72);
  --panel-light: rgba(255, 255, 255, 0.08);
  --text: #e5eefb;
  --muted: #9fb0ca;
  --accent: #38bdf8;
  --accent-strong: #0ea5e9;
  --danger: #f87171;
  --border: rgba(148, 163, 184, 0.2);
  --shadow: 0 20px 50px rgba(0, 0, 0, 0.25);
}

* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: linear-gradient(160deg, #0f172a 0%, #111827 45%, #0b1120 100%);
  color: var(--text);
  min-height: 100vh;
}

.app {
  width: min(1100px, calc(100% - 2rem));
  margin: 0 auto;
  padding: 2rem 0 3rem;
}

.hero { margin-bottom: 1.5rem; }
.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--accent);
  font-weight: 700;
  font-size: 0.78rem;
  margin-bottom: 0.5rem;
}

h1, h2, p { margin-top: 0; }
h1 { font-size: clamp(2rem, 4vw, 3rem); line-height: 1.05; margin-bottom: 0.75rem; }
.sub { color: var(--muted); max-width: 60ch; }

.summary {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 18px;
  box-shadow: var(--shadow);
  backdrop-filter: blur(16px);
}

.stat-card {
  padding: 1rem;
}
.stat-card span {
  display: block;
  color: var(--muted);
  font-size: 0.9rem;
  margin-bottom: 0.35rem;
}
.stat-card strong {
  font-size: 1.6rem;
}

.grid {
  display: grid;
  grid-template-columns: 360px 1fr;
  gap: 1rem;
}

.form-card, .table-card { padding: 1.25rem; }
.field-grid {
  display: grid;
  gap: 0.9rem;
}
label span {
  display: block;
  margin-bottom: 0.45rem;
  color: var(--muted);
  font-size: 0.92rem;
}
input {
  width: 100%;
  padding: 0.9rem 1rem;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: var(--panel-light);
  color: var(--text);
  font: inherit;
}
input:focus {
  outline: 2px solid rgba(56, 189, 248, 0.4);
  border-color: var(--accent);
}
.actions {
  display: flex;
  gap: 0.75rem;
  margin-top: 1rem;
}
button {
  border: 0;
  border-radius: 12px;
  padding: 0.9rem 1rem;
  font: inherit;
  font-weight: 700;
  cursor: pointer;
  background: var(--accent);
  color: #082032;
}
button:hover { background: var(--accent-strong); }
button.ghost {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--border);
}
.delete-btn {
  padding: 0.55rem 0.8rem;
  background: transparent;
  color: var(--danger);
  border: 1px solid rgba(248, 113, 113, 0.35);
}
.table-header {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  align-items: baseline;
}
#emptyStateHint { color: var(--muted); font-size: 0.92rem; }
.table-wrap { overflow-x: auto; }
table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 0.75rem;
}
th, td {
  text-align: left;
  padding: 0.85rem 0.75rem;
  border-bottom: 1px solid var(--border);
  white-space: nowrap;
}
th { color: var(--muted); font-size: 0.82rem; text-transform: uppercase; letter-spacing: 0.05em; }

@media (max-width: 900px) {
  .grid { grid-template-columns: 1fr; }
}

@media (max-width: 640px) {
  .app { width: min(100% - 1rem, 1100px); padding-top: 1rem; }
  .form-card, .table-card { padding: 1rem; }
  .actions { flex-direction: column; }
}