* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, "Apple SD Gothic Neo", sans-serif;
  font-size: 15px;
  line-height: 1.6;
  color: #1c2330;
  background: #f2f4f8;
}

.wrap {
  max-width: 960px;
  margin: 0 auto;
  padding: 24px 16px 64px;
}

.app-head h1 {
  margin: 0;
  font-size: 28px;
  letter-spacing: -0.5px;
}

.tagline {
  margin: 8px 0 0;
  color: #5a6577;
}

.topnav {
  display: flex;
  gap: 8px;
  margin: 24px 0 8px;
  flex-wrap: wrap;
}

.nav-btn {
  padding: 8px 16px;
  font-size: 15px;
  border: 1px solid #d5dae3;
  border-radius: 8px;
  background: #fff;
  color: #1c2330;
  cursor: pointer;
}

.nav-btn.active {
  background: #2352e0;
  border-color: #2352e0;
  color: #fff;
}

#app-status {
  min-height: 24px;
  margin: 8px 0;
  font-size: 15px;
  color: #b3261e;
}

main h2 {
  margin: 16px 0;
  font-size: 20px;
}

.card {
  background: #fff;
  border: 1px solid #e3e7ee;
  border-radius: 12px;
  padding: 24px;
  margin: 0 0 16px;
}

.card p {
  margin: 0 0 8px;
}

#fx-line {
  font-size: 20px;
  font-weight: 600;
}

#data-time {
  color: #5a6577;
  font-size: 14px;
}

#coin-list {
  list-style: none;
  margin: 0 0 16px;
  padding: 0;
}

.coin-row {
  background: #fff;
  border: 1px solid #e3e7ee;
  border-radius: 12px;
  padding: 16px 24px;
  margin-bottom: 8px;
}

.coin-row .coin-name {
  display: block;
  font-size: 17px;
  font-weight: 600;
  margin-bottom: 8px;
}

.coin-row .krw-price {
  display: block;
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 8px;
}

.coin-row .usd-change,
.coin-row .fx-effect,
.coin-row .real-change {
  display: inline-block;
  margin-right: 16px;
  font-size: 14px;
}

.real-change.up { color: #15734b; }
.real-change.down { color: #c62828; }
.real-change.flat { color: #6b7280; }

.bar-wrap {
  margin-top: 8px;
  height: 8px;
  border-radius: 4px;
  background: #edf0f5;
  overflow: hidden;
}

.real-bar {
  height: 100%;
  border-radius: 4px;
}

.real-bar.up { background: #22a06b; }
.real-bar.down { background: #e05252; }
.real-bar.flat { background: #9aa2af; }

.source-line {
  margin: 0 0 16px;
  font-size: 12px;
  color: #8a93a3;
}

button.primary {
  padding: 12px 24px;
  font-size: 15px;
  border: none;
  border-radius: 8px;
  background: #2352e0;
  color: #fff;
  cursor: pointer;
}

button.primary:disabled {
  background: #a8bcf0;
}

.btn-row {
  display: flex;
  gap: 8px;
  align-items: center;
  flex-wrap: wrap;
  margin-top: 16px;
}

.btn-row button {
  font-size: 15px;
}

.import-label {
  font-size: 15px;
  color: #1c2330;
  cursor: pointer;
  border: 1px solid #d5dae3;
  border-radius: 8px;
  padding: 8px 16px;
  background: #fff;
  display: inline-block;
}

.import-label:hover {
  background: #f2f4f8;
}

/* 파일 입력 원본(브라우저 기본 "Choose File")은 시각적으로 숨기고 label 로 대체 */
.import-input {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

#extra-coin {
  display: block;
  margin-top: 8px;
  padding: 8px;
  font-size: 15px;
  border: 1px solid #d5dae3;
  border-radius: 8px;
  background: #fff;
}

@media (max-width: 390px) {
  .coin-row .usd-change,
  .coin-row .fx-effect,
  .coin-row .real-change {
    display: block;
    margin: 0 0 4px;
  }
}