:root {
  --bg: #f4f7fb;
  --panel: #ffffff;
  --text: #122233;
  --muted: #5a6d80;
  --brand: #0f766e;
  --brand-strong: #0b5f58;
  --warn: #b45309;
  --line: #d7e0ea;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Segoe UI", "Helvetica Neue", Arial, sans-serif;
  color: var(--text);
  background:
    radial-gradient(1200px 500px at 20% -10%, #d8f0ee, transparent),
    radial-gradient(1000px 400px at 100% 0%, #e8edf8, transparent),
    var(--bg);
}

.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 24px;
  border-bottom: 1px solid var(--line);
  background: #ffffffcc;
  backdrop-filter: blur(4px);
}

h1, h2 {
  margin: 0;
  letter-spacing: 0;
}

h1 { font-size: 1.4rem; }
h2 { font-size: 1rem; margin-bottom: 12px; }

.container {
  max-width: 1200px;
  margin: 24px auto;
  padding: 0 16px;
  display: grid;
  gap: 16px;
}

.panel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 16px;
}

.center-wrap {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 16px;
}

.auth-panel {
  width: min(460px, 100%);
}

.stack {
  display: grid;
  gap: 10px;
}

.create-form {
  display: grid;
  grid-template-columns: 1fr 1fr auto;
  gap: 10px;
}

input, button {
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 10px 12px;
  font-size: 0.95rem;
}

button {
  background: var(--brand);
  color: #fff;
  cursor: pointer;
  border: 1px solid var(--brand);
}

button:hover { background: var(--brand-strong); }
.warn { background: var(--warn); border-color: var(--warn); }
.ghost { background: #fff; color: var(--text); }

.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; font-size: 0.92rem; }
th, td { border-bottom: 1px solid var(--line); padding: 10px 8px; text-align: left; }

.actions {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.actions form { margin: 0; }

.flash-list {
  display: grid;
  gap: 8px;
}

.flash {
  padding: 10px;
  border-radius: 8px;
  border: 1px solid var(--line);
  background: #f8fbff;
}

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