:root {
  --bg: #f6f7fb;
  --panel: #ffffff;
  --text: #1d2a3a;
  --brand: #6a4cff;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: Arial, sans-serif;
  color: var(--text);
  background: var(--bg);
}

.container {
  width: min(1000px, 92vw);
  margin: 0 auto;
}

.site-header,
.site-footer {
  background: var(--panel);
  border-bottom: 1px solid #e9ecf2;
}

.site-footer {
  border-top: 1px solid #e9ecf2;
  border-bottom: 0;
  margin-top: 2rem;
}

.site-header h1 {
  margin: 0;
  padding-top: 1rem;
}

nav {
  display: flex;
  gap: 1rem;
  padding: 0.75rem 0 1rem;
}

nav a {
  color: var(--brand);
  text-decoration: none;
  font-weight: 600;
}

.button-link {
  display: inline-block;
  text-decoration: none;
  border: 0;
  padding: 0.5rem 0.8rem;
  border-radius: 8px;
  background: var(--brand);
  color: #fff;
  cursor: pointer;
}

.inline-form {
  display: inline;
}

button {
  border: 0;
  padding: 0.5rem 0.8rem;
  border-radius: 8px;
  background: var(--brand);
  color: #fff;
  cursor: pointer;
}

input {
  width: 100%;
  padding: 0.55rem 0.6rem;
  border: 1px solid #ccd4e0;
  border-radius: 8px;
  margin-bottom: 0.8rem;
}

select {
  width: 100%;
  padding: 0.4rem 0.5rem;
  border: 1px solid #ccd4e0;
  border-radius: 8px;
  margin-bottom: 0.4rem;
}

.card {
  margin-top: 1.5rem;
  padding: 1rem 1.2rem;
  background: var(--panel);
  border-radius: 12px;
  box-shadow: 0 8px 25px rgba(32, 46, 84, 0.06);
}

.playful-banner {
  background: linear-gradient(135deg, #ffe3f5, #e9e5ff);
}

.chart-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 1rem;
}

.chart-card .meta {
  color: #61718a;
  font-size: 0.9rem;
}

.chart-grid-wrap {
  overflow-x: auto;
}

.chart-nav {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 0.8rem;
}

.chart-grid {
  width: 100%;
  border-collapse: collapse;
  min-width: 720px;
}

.chart-grid th,
.chart-grid td {
  border: 1px solid #e5eaf3;
  text-align: center;
  padding: 0.65rem 0.5rem;
}

.goal-name {
  text-align: left;
  min-width: 180px;
}

.goal-done {
  background: linear-gradient(90deg, rgba(255, 253, 218, 0.95), rgba(220, 255, 232, 0.95));
}

.done-badge {
  margin-left: 0.5rem;
  color: #1f7d2a;
  font-weight: 700;
}

.goal-reward {
  margin-top: 0.35rem;
  color: #2d7d39;
  font-size: 0.9rem;
  font-weight: 600;
}

.sticker-chip {
  display: inline-block;
  border-radius: 999px;
  padding: 0.25rem 0.5rem;
  font-size: 0.8rem;
  font-weight: 700;
}

.sticker-chip img {
  width: 28px;
  height: 28px;
  object-fit: contain;
  vertical-align: middle;
}

.sticker-chip.provisional {
  background: #e8f0ff;
  color: #2f5bb8;
}

.sticker-chip.final {
  background: #ffe8bd;
  color: #905f00;
}

.empty-cell {
  color: #9da9bc;
}

.theme-rainbow-adventure {
  background: linear-gradient(135deg, #fff6cc, #ffd7e8 35%, #d9d6ff);
}

.theme-space-explorer {
  background: linear-gradient(135deg, #d2f4ff, #d7e9ff 40%, #dbdcff);
}

.stack-form {
  max-width: 360px;
}

.stack-form label {
  display: block;
  margin: 0.4rem 0;
  font-weight: 600;
}

.flash {
  margin-top: 1rem;
  padding: 0.6rem 0.8rem;
  border-radius: 8px;
}

.flash-error {
  background: #ffe7e7;
  color: #8f2525;
}

.flash-success {
  background: #e8ffe9;
  color: #2d7d39;
}

.assign-form {
  min-width: 88px;
}

.plain-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.plain-list li {
  padding: 0.5rem 0;
  border-bottom: 1px solid #e8edf5;
}

.compact-form {
  margin-top: 0.5rem;
  max-width: 480px;
}