:root {
  color-scheme: light;
  --bg: #f4f2ee;
  --panel: #ffffff;
  --ink: #1c1b18;
  --muted: #726a63;
  --accent: #1f6f5b;
  --accent-soft: rgba(31, 111, 91, 0.1);
  --stroke: rgba(28, 27, 24, 0.1);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Sora", "Segoe UI", sans-serif;
  background: radial-gradient(circle at top left, #fff7eb, transparent 55%),
    radial-gradient(circle at 80% 0%, #e9f3ef, transparent 60%),
    var(--bg);
  color: var(--ink);
  min-height: 100vh;
}

.shell {
  max-width: 960px;
  margin: 0 auto;
  padding: 48px 20px 60px;
  display: grid;
  gap: 22px;
}

.card {
  background: var(--panel);
  border-radius: 26px;
  padding: 28px;
  box-shadow: 0 24px 60px rgba(21, 19, 16, 0.12);
  border: 1px solid var(--stroke);
}

.card__header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 20px;
  flex-wrap: wrap;
  margin-bottom: 24px;
}

.eyebrow {
  font-family: "JetBrains Mono", monospace;
  text-transform: uppercase;
  letter-spacing: 0.2em;
  font-size: 12px;
  color: var(--muted);
}

h1 {
  margin: 8px 0 0;
  font-size: clamp(24px, 4vw, 32px);
}

.controls {
  display: flex;
  align-items: center;
  gap: 10px;
}

button {
  border: 1px solid var(--stroke);
  background: #ffffff;
  padding: 10px 14px;
  border-radius: 999px;
  font-family: "JetBrains Mono", monospace;
  font-size: 12px;
  cursor: pointer;
  transition: transform 0.15s ease, border-color 0.15s ease;
}

button:hover {
  transform: translateY(-1px);
  border-color: var(--accent);
}

.weekdays,
.grid {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 10px;
}

.weekdays div {
  font-family: "JetBrains Mono", monospace;
  font-size: 11px;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.15em;
}

.day {
  border-radius: 16px;
  padding: 12px;
  min-height: 86px;
  border: 1px solid transparent;
  display: grid;
  gap: 6px;
  background: rgba(255, 255, 255, 0.6);
}

.day span {
  font-size: 14px;
  color: var(--muted);
}

.day.current {
  border-color: var(--stroke);
  color: var(--ink);
}

.day.today {
  background: var(--accent-soft);
  border-color: var(--accent);
}

.day.today span {
  color: var(--accent);
  font-weight: 600;
}

.footer {
  display: flex;
  justify-content: space-between;
  color: var(--muted);
  font-size: 14px;
}

.footer a {
  color: var(--accent);
  text-decoration: none;
}

@media (max-width: 720px) {
  .card {
    padding: 20px;
  }

  .day {
    min-height: 70px;
  }
}