/* CSS Cubic Bezier 편집기 전용 스타일 */

nav { max-width: 920px; }
main { max-width: 920px; }

.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: 0.35rem 0.7rem;
  font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  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;
}

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

/* 편집기 그리드 */
.editor-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin-bottom: 1rem;
}

.curve-area {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 0.85rem;
  display: flex;
  align-items: center;
  justify-content: center;
}

.curve-svg {
  width: 100%;
  max-width: 320px;
  height: auto;
  color: var(--text);
  user-select: none;
  touch-action: none;
}

.curve-svg circle[id^="ctrl-"] {
  transition: r 0.15s;
}

.curve-svg circle[id^="ctrl-"]:hover {
  r: 11;
}

/* 미리보기 */
.preview-area {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 0.85rem 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.7rem;
}

.prev-title {
  margin: 0;
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--text-sub);
}

.ball-track {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  height: 60px;
  position: relative;
  overflow: hidden;
}

.ball {
  position: absolute;
  top: 50%;
  left: 4px;
  transform: translateY(-50%) translateX(0);
  width: 36px;
  height: 36px;
  margin-top: -18px;
  border-radius: 50%;
  background: var(--primary);
  background: linear-gradient(135deg, var(--primary), #a855f7);
  box-shadow: 0 4px 12px rgba(102, 126, 234, 0.35);
  /* 트랙 너비에서 공 크기를 뺀 만큼 이동 */
}

.ball {
  /* JS에서 transform을 직접 컨트롤하므로 transition만 동적 적용 */
}

.play-btn {
  padding: 0.55rem 1rem;
  font-size: 0.85rem;
  font-weight: 600;
  background: var(--primary);
  color: #fff;
  border: 1px solid var(--primary);
  border-radius: 7px;
  cursor: pointer;
  transition: all 0.15s;
  align-self: flex-start;
}

.play-btn:hover:not(:disabled) {
  filter: brightness(1.08);
}

.play-btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.duration-row {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.82rem;
  color: var(--text-sub);
}

.duration-row label {
  font-weight: 600;
  white-space: nowrap;
}

.duration-row input[type="range"] {
  flex: 1;
  accent-color: var(--primary);
}

.duration-val {
  font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  font-size: 0.8rem;
  color: var(--text);
  min-width: 50px;
  text-align: right;
}

/* 입력 영역 */
.inputs {
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
  margin-bottom: 1rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 0.85rem 1rem;
}

.input-row {
  display: flex;
  align-items: center;
  gap: 0.7rem;
}

.ip-label {
  font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--primary);
  min-width: 30px;
}

.ip-field {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  flex: 1;
}

.ip-field label {
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--text-sub);
  font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  min-width: 20px;
}

.ip-field input {
  flex: 1;
  padding: 0.4rem 0.55rem;
  font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  font-size: 0.88rem;
  font-weight: 600;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--bg);
  color: var(--text);
  outline: none;
  text-align: right;
  min-width: 0;
}

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

/* 출력 */
.output {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  overflow: hidden;
  margin-bottom: 1.5rem;
}

.output-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.5rem 0.85rem;
  background: var(--bg);
  border-bottom: 1px solid var(--border);
}

.output-label {
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--text-sub);
}

.btn-copy {
  padding: 0.4rem 0.85rem;
  font-size: 0.78rem;
  font-weight: 600;
  background: var(--surface);
  color: var(--text-sub);
  border: 1px solid var(--border);
  border-radius: 6px;
  cursor: pointer;
  transition: all 0.15s;
}

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

.output-code {
  margin: 0;
  padding: 0.85rem 1rem;
  font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  font-size: 0.88rem;
  line-height: 1.55;
  background: var(--surface);
  color: var(--text);
  white-space: pre-wrap;
  word-break: break-all;
}

@media (max-width: 720px) {
  .editor-grid { grid-template-columns: 1fr; }
  .curve-svg { max-width: 280px; }
  .preset { font-size: 0.72rem; padding: 0.3rem 0.55rem; }
}