:root {
  --bg: #f4f7f6;
  --panel: #ffffff;
  --border: #d8e2de;
  --text: #12332a;
  --muted: #557168;
  --primary: #0f766e;
  --primary-strong: #0b5d57;
  --danger: #b42318;
  --ok: #117a45;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Segoe UI", "Noto Sans", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at 10% 10%, #dff6ef 0, transparent 45%),
    radial-gradient(circle at 90% 90%, #e9f8ed 0, transparent 40%),
    var(--bg);
}

.container {
  width: min(1100px, 94vw);
  margin: 0 auto;
  padding: 1.5rem 0 2rem;
}

.hero {
  margin-bottom: 1rem;
}

.hero h1 {
  margin: 0 0 0.3rem;
  font-size: clamp(1.8rem, 3.5vw, 2.6rem);
}

.hero p {
  margin: 0;
  color: var(--muted);
}

.panel {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 1rem;
  box-shadow: 0 8px 22px rgba(18, 51, 42, 0.08);
  margin-bottom: 1rem;
}

.auth-grid,
.form-grid,
.list-grid {
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.cards {
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.card h3 {
  margin-top: 0;
}

.metric {
  font-size: clamp(1.7rem, 3.8vw, 2.2rem);
  font-weight: 700;
  margin: 0.3rem 0;
}

.stack {
  display: grid;
  gap: 0.7rem;
}

label {
  display: grid;
  gap: 0.25rem;
  font-size: 0.95rem;
}

input {
  width: 100%;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 0.62rem 0.7rem;
  font: inherit;
}

input:focus {
  outline: 2px solid #a6e8dc;
  outline-offset: 1px;
}

.btn {
  border: 0;
  border-radius: 10px;
  padding: 0.64rem 0.95rem;
  font: inherit;
  font-weight: 600;
  background: var(--primary);
  color: #fff;
  cursor: pointer;
}

.btn:hover {
  background: var(--primary-strong);
}

.btn.ghost {
  background: transparent;
  color: var(--primary-strong);
  border: 1px solid var(--border);
}

.row {
  display: flex;
  align-items: center;
  gap: 0.8rem;
}

.between {
  justify-content: space-between;
}

.message {
  padding: 0.8rem 1rem;
  border-radius: 10px;
  margin-bottom: 1rem;
}

.message.error {
  background: #ffe5e5;
  color: var(--danger);
  border: 1px solid #ffc7c7;
}

.message.success {
  background: #e7f9ef;
  color: var(--ok);
  border: 1px solid #c8f0d8;
}

.entry-list {
  margin: 0;
  padding-left: 1.1rem;
  max-height: 220px;
  overflow: auto;
}

.entry-list li {
  margin-bottom: 0.35rem;
}

.chart-panel canvas {
  width: 100%;
  border-radius: 10px;
  border: 1px solid #e7efec;
  background: #fbfefd;
}

.hidden {
  display: none !important;
}

@media (max-width: 920px) {
  .cards {
    grid-template-columns: 1fr;
  }

  .auth-grid,
  .form-grid,
  .list-grid {
    grid-template-columns: 1fr;
  }
}