/* 화면 비율 계산기 전용 스타일 */

nav { max-width: 820px; }
main { max-width: 820px; }

.subtitle {
  color: var(--text-sub);
  margin-bottom: 1rem;
}

/* 프리셋 */
.presets {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.4rem;
  margin-bottom: 1rem;
}

.presets-label {
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--text-sub);
  margin-right: 0.3rem;
}

.preset {
  padding: 0.4rem 0.7rem;
  font-size: 0.78rem;
  font-weight: 600;
  background: var(--surface);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 6px;
  cursor: pointer;
  transition: all 0.15s;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}

.preset em {
  font-style: normal;
  font-size: 0.72rem;
  color: var(--text-sub);
  font-weight: 500;
}

.preset:hover {
  border-color: var(--primary);
  color: var(--primary);
}

.preset:hover em {
  color: var(--primary);
}

/* 사이즈 그리드 */
.size-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.85rem;
  margin-bottom: 1.25rem;
}

.size-block {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 0.85rem 1rem;
}

.size-block.highlight {
  border-color: var(--primary);
  background: linear-gradient(135deg, rgba(102, 126, 234, 0.06), rgba(118, 75, 162, 0.04));
}

.size-title {
  margin: 0 0 0.55rem 0;
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--text);
  letter-spacing: 0.02em;
}

.size-row {
  display: flex;
  align-items: flex-end;
  gap: 0.5rem;
}

.size-field {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  min-width: 0;
}

.size-field label {
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--text-sub);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.size-field input {
  width: 100%;
  padding: 0.55rem 0.7rem;
  font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  font-size: 1.05rem;
  font-weight: 700;
  border: 1px solid var(--border);
  border-radius: 7px;
  background: var(--bg);
  color: var(--text);
  outline: none;
  text-align: center;
  box-sizing: border-box;
}

.size-field input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.12);
}

.size-x {
  font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-sub);
  padding-bottom: 0.55rem;
}

/* 비율 영역 */
.ratio-row {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 0.85rem;
  align-items: center;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 0.95rem 1rem;
  margin-bottom: 1.5rem;
}

.ratio-card {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
}

.ratio-label {
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--text-sub);
}

.ratio-val {
  font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  font-size: 1.7rem;
  font-weight: 800;
  color: var(--primary);
  line-height: 1;
}

.ratio-decimal {
  font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  font-size: 0.78rem;
  color: var(--text-sub);
}

.preview-stage {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 130px;
  padding: 0.5rem;
}

.ratio-box {
  background: linear-gradient(135deg, rgba(102, 126, 234, 0.2), rgba(118, 75, 162, 0.18));
  border: 2px solid var(--primary);
  border-radius: 6px;
  transition: width 0.2s, height 0.2s;
}

.copy-btn {
  padding: 0.55rem 1rem;
  font-size: 0.82rem;
  font-weight: 600;
  background: var(--primary);
  color: #fff;
  border: 1px solid var(--primary);
  border-radius: 7px;
  cursor: pointer;
  transition: all 0.15s;
  white-space: nowrap;
}

.copy-btn:hover {
  filter: brightness(1.08);
}

@media (max-width: 720px) {
  .size-grid { grid-template-columns: 1fr; }
  .ratio-row {
    grid-template-columns: 1fr;
    gap: 0.7rem;
  }
  .ratio-card { align-items: center; text-align: center; }
  .copy-btn { width: 100%; }
}

@media (max-width: 480px) {
  .preset { font-size: 0.72rem; padding: 0.3rem 0.55rem; }
  .preset em { display: none; }
  .ratio-val { font-size: 1.4rem; }
  .size-field input { font-size: 0.95rem; }
}