:root {
  --ink: #243136;
  --teal: #005468;
  --teal-2: #5e93a8;
  --card: #f4f6f7;
  --line: #c5d0d4;
  --name: #1a7c90;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  color: var(--ink);
  font-family: "PingFang TC", "Noto Sans TC", "Microsoft JhengHei", sans-serif;
  line-height: 1.65;
}

.sheet {
  width: min(1080px, calc(100% - 48px));
  margin: 28px auto 64px;
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  gap: 56px;
  align-items: start;
}

.scene {
  height: auto;
  display: flex;
  align-items: flex-end;
  justify-content: center;
  margin: 8px 8px 0;
}

.scene img {
  width: 100%;
  height: auto;
  display: block;
  border-radius: 28px;
  box-shadow: 0 16px 36px rgba(0, 84, 104, 0.12);
}

.card {
  margin-top: 16px;
  padding: 34px 46px 28px;
  border: 3px solid var(--teal);
  border-radius: 36px;
  background: var(--card);
  box-shadow: 0 18px 40px rgba(0, 70, 88, 0.08);
}

h1 {
  margin: 0 0 12px;
  font-size: 26px;
  line-height: 1.35;
  font-weight: 800;
}

.lead {
  margin: 0 0 22px;
  color: #4a555b;
  font-size: 15px;
  line-height: 1.9;
}

label {
  display: block;
  margin: 0 0 6px;
  font-size: 16px;
}

input {
  width: 100%;
  height: 44px;
  margin-bottom: 16px;
  padding: 0 12px;
  border: 1px solid #d5dbe0;
  border-radius: 4px;
  background: #fff;
  color: var(--ink);
  font: inherit;
  font-size: 16px;
}

input::placeholder { color: #b0b7bc; }

input:focus {
  outline: 2px solid rgba(0, 84, 104, 0.2);
  border-color: var(--teal);
}

input.is-invalid { border-color: #d4534a; background: #fff6f5; }

.form-error {
  margin: -4px 0 12px;
  color: #9a3b32;
  font-size: 14px;
  font-weight: 650;
}

input:focus-visible,
button:focus-visible,
a:focus-visible {
  outline: 2px solid #005468;
  outline-offset: 2px;
}

.actions {
  display: flex;
  justify-content: center;
  gap: 12px;
  margin-top: 6px;
}

button {
  min-width: 108px;
  height: 40px;
  padding: 0 16px;
  border: 0;
  border-radius: 5px;
  color: #fff;
  font: inherit;
  font-size: 16px;
  cursor: pointer;
}

#send { background: var(--teal); }
#clean { background: var(--teal-2); }
#send:hover { background: #013848; }
#clean:hover { background: #4d8296; }

.records h2 {
  margin: 28px 0 12px;
  text-align: center;
  font-size: 22px;
  font-weight: 800;
}

.average {
  margin: 0 0 12px;
  text-align: center;
  font-size: 15px;
}

.record {
  margin-bottom: 10px;
  padding: 8px 10px;
  border: 1px solid currentColor;
  border-radius: 4px;
  text-align: center;
}

.guide { padding-top: 72px; }

.guide h2 {
  margin: 0 auto 18px;
  max-width: 16em;
  text-align: center;
  text-wrap: balance;
  font-size: 18px;
  font-weight: 650;
  line-height: 1.5;
}

.grade {
  margin: 0 0 14px;
  padding: 16px 18px 14px;
  border: 2px solid #9aabb2;
  border-radius: 16px;
  background: #fff;
  list-style: none;
  font-size: 16px;
}

.grade b {
  display: block;
  margin-bottom: 2px;
  font-size: 18px;
}

.name { color: var(--name); font-weight: 800; }

.source {
  margin: 4px 0 22px;
  color: #8a8a8a;
  font-size: 12px;
}

.ask { margin: 0 0 10px; font-size: 16px; }

.bmr {
  display: inline-block;
  padding: 10px 14px;
  border-radius: 6px;
  background: #3d8496;
  color: #fff;
  font-weight: 800;
  text-decoration: none;
}

.bmr:hover { background: var(--teal); }

.more {
  display: inline-block;
  margin-top: 18px;
  color: var(--teal);
  font-size: 14px;
}

.blue { color: #246f8a; }
.green { color: #4f752a; }
.yellow { color: #a68400; }
.orange { color: #e07a00; }
.red { color: #d61f1f; }
.purple { color: #6d18b3; }

@media (max-width: 860px) {
  .sheet { grid-template-columns: 1fr; gap: 12px; width: min(1080px, calc(100% - 28px)); }
  .card { padding: 28px 20px 24px; }
  .guide { padding-top: 8px; }
}