* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  width: 100vw;
  height: 100vh;
  font-family: Arial, Helvetica, sans-serif;
  background-color: #ededed;
  color: #222;
  overflow: hidden;
}

.container {
  display: flex;
  height: 100%;
  width: 100%;
  min-width: 0;
  min-height: 0;
}

.title-row {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  width: 100%;
  align-items: center;
}

.form-title {
  grid-column: 2;
  justify-self: center;
  text-align: center;
}

.switch {
  grid-column: 3;
  justify-self: end;
}

/* Unit toggle */
.switch-label {
  display: inline-block;
  width: 60px;
  height: 30px;
  background-color: #00a2ff;
  border-radius: 35px;
  position: relative;
  cursor: pointer;
}

.switch-label::before {
  position: absolute;
  content: "IN";
  display: inline-flex;
  width: 25px;
  height: 25px;
  border-radius: 50%;
  background-color: #72cbff;
  color: white;
  font-size: 0.75rem;
  font-weight: bold;
  justify-content: center;
  align-items: center;
  top: 50%;
  transform: translate(0, -50%);
  left: 2px;
  pointer-events: none;
  transition: transform 0.3s ease-in-out;
}

.type-checkbox:checked + .switch-label::before {
  transform: translate(calc(100% + 6px), -50%);
  content: "MM";
}

/* Form container */
.form-container {
  flex: 1;
  display: flex;
  padding: 3rem;
  flex-direction: column;
  align-items: flex-start;
  gap: 3rem;
  overflow-y: auto;
}

.form-title {
  font-size: 2rem;
}

.share-section {
  position: relative;
  width: 100%;
  display: flex;
  align-items: flex-start;
  gap: 0.65rem;
  flex-wrap: wrap;
}

.share-section-canvas {
  position: absolute;
  top: 48px;
  left: 10px;
  right: 10px;
  z-index: 5;
  padding: 0.54rem;
  border: 2px solid #35adf7;
  border-radius: 14px;
  background: rgba(247, 252, 255, 0.96);
  backdrop-filter: blur(3px);
  box-shadow: 0 2px 9px rgba(0, 0, 0, 0.08);
}

.share-trigger {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  border: 1px solid #169ce9;
  background: #1ea3f7;
  color: #fff;
  border-radius: 999px;
  font-size: 0.78rem;
  font-weight: bold;
  line-height: 1;
  padding: 0.42rem 0.72rem;
  cursor: pointer;
  white-space: nowrap;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.24);
  transition: background 0.15s, border-color 0.15s;
}

.share-trigger:hover {
  background: #1098ee;
  border-color: #0689da;
}

.share-trigger-icon {
  font-size: 0.8rem;
  line-height: 1;
}

.share-panel {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  flex: 1 1 420px;
  min-width: 0;
  flex-wrap: wrap;
}

.share-panel[hidden] {
  display: none;
}

.share-chip {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid #94cdff;
  background: #ffffff;
  color: #24698f;
  border-radius: 999px;
  padding: 0.32rem 0.58rem;
  font-size: 0.7rem;
  font-weight: bold;
  line-height: 1;
  white-space: nowrap;
  text-decoration: none;
  cursor: pointer;
  transition: border-color 0.15s, color 0.15s, background 0.15s;
}

button.share-chip {
  font-family: inherit;
}

.share-chip:hover {
  border-color: #53b6f8;
  color: #0a5b8c;
  background: #f5fbff;
}

.share-chip[aria-disabled="true"] {
  pointer-events: none;
  opacity: 0.55;
}

.share-feedback {
  flex: 1 0 100%;
  min-height: 1em;
  padding-left: 0.1rem;
  font-size: 0.68rem;
  color: #4a4a4a;
}

.share-feedback.success {
  color: #0c7c39;
}

.share-feedback.error {
  color: #b3321f;
}

.part-caption {
  font-size: 0.8rem;
  color: #666;
  margin-bottom: 0.4rem;
  text-align: center;
}

.part-selector {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  justify-content: center;
}

.part-btn {
  padding: 0.3rem 0.7rem;
  font-size: 0.78rem;
  font-weight: bold;
  border: 1.5px solid #aaa;
  border-radius: 12px;
  background: #fff;
  cursor: pointer;
  color: #444;
  transition: all 0.15s;
}

.part-btn:hover {
  border-color: #00a2ff;
  color: #00a2ff;
}

.part-btn.active {
  background: #00a2ff;
  border-color: #00a2ff;
  color: #fff;
}

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

.form {
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.preset-section {
  width: 100%;
  border: 1px solid #d7d7d7;
  border-radius: 10px;
  background: #f6f6f6;
  padding: 0.8rem;
  display: flex;
  flex-direction: column;
  gap: 0.7rem;
}

.preset-head h3 {
  font-size: 1rem;
  margin-bottom: 0.2rem;
}

.preset-head p {
  font-size: 0.78rem;
  color: #585858;
}

.preset-layout {
  display: grid;
  grid-template-columns: 1.3fr 1fr;
  gap: 0.6rem;
  min-height: 165px;
}

.preset-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.5rem;
  max-height: 165px;
  overflow-y: auto;
  padding-right: 0.25rem;
  align-content: start;
}

.preset-item {
  display: block;
  border: 1px solid #bfbfbf;
  background: #ffffff;
  border-radius: 7px;
  padding: 0;
  text-align: left;
  cursor: pointer;
  color: #2a2a2a;
  text-decoration: none;
  transition: border-color 0.14s, background-color 0.14s;
  overflow: hidden;
}

.preset-item img {
  display: block;
  width: 100%;
  height: 54px;
  object-fit: cover;
  background: #dfdfdf;
}

.preset-item-copy {
  display: flex;
  flex-direction: column;
  gap: 0.1rem;
  padding: 0.35rem 0.45rem 0.4rem;
}

.preset-item strong {
  font-size: 0.72rem;
  line-height: 1.2;
}

.preset-item span {
  font-size: 0.66rem;
  color: #6a6a6a;
}

.preset-item:hover {
  border-color: #00a2ff;
}

.preset-item.active {
  border-color: #00a2ff;
  background: #eef8ff;
}

.preset-preview {
  display: flex;
  flex-direction: column;
  border-radius: 8px;
  border: 1px solid #c8c8c8;
  overflow: hidden;
  text-decoration: none;
  background: #ffffff;
}

.preset-preview.disabled {
  pointer-events: none;
  opacity: 0.75;
}

.preset-preview img {
  width: 100%;
  height: 84px;
  object-fit: cover;
  background: #e7e7e7;
}

.preset-preview-copy {
  padding: 0.48rem 0.52rem;
  display: flex;
  flex-direction: column;
  gap: 0.22rem;
}

.preset-preview-copy strong {
  color: #2a2a2a;
  font-size: 0.78rem;
}

.preset-preview-copy span {
  color: #5a5a5a;
  font-size: 0.7rem;
}

.preset-preview-cta {
  color: #0078c7;
  font-weight: bold;
  margin-top: 0.12rem;
}

.field-container {
  display: flex;
  justify-content: center;
  align-items: center;
}

.field-container label {
  text-align: center;
  font-size: 1.2rem;
  min-width: 200px;
}

.input-field {
  border-radius: 3px;
  border: 1px solid #222;
  outline: none;
  max-width: 200px;
  padding: 0.3rem 0.3rem;
  font-size: 1rem;
}

.input-field:focus {
  border-color: #00a2ff;
}

.units {
  font-size: 0.85rem;
  color: #666;
  margin-left: 4px;
}

/* Error message */
.error-msg {
  display: none;
  font-size: 0.85rem;
  color: #cc2200;
  background: #fff0ee;
  border: 1px solid #ffcccc;
  border-radius: 6px;
  padding: 8px 12px;
  line-height: 1.4;
}

/* Download button */
.submit-button {
  align-self: center;
  padding: 0.6rem 1.4rem;
  font-size: 0.9rem;
  font-weight: bold;
  background-color: #00a2ff;
  border: none;
  outline: none;
  border-radius: 20px;
  color: white;
  margin-top: 1rem;
  cursor: pointer;
  transition: background 0.15s;
}

.submit-button:hover {
  background-color: #0090e0;
}

/* Canvas */
.canvas-container {
  flex: 2;
  overflow: hidden;
  position: relative;
}

.canvas-tabs {
  position: absolute;
  top: 8px;
  left: 50%;
  transform: translateX(-50%);
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  z-index: 6;
  padding: 0.25rem;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.9);
  border: 1px solid rgba(0, 0, 0, 0.13);
}

.canvas-tab {
  border: none;
  border-radius: 999px;
  background: transparent;
  color: #2d2d2d;
  padding: 0.35rem 0.7rem;
  font-size: 0.72rem;
  font-weight: bold;
  cursor: pointer;
}

.canvas-tab.active {
  background: #00a2ff;
  color: #fff;
}

.canvas-panel {
  position: absolute;
  inset: 0;
  display: none;
}

.canvas-panel.active {
  display: block;
}

.canvas {
  width: 100%;
  height: 100%;
  display: block;
}

.canvas-hint {
  position: absolute;
  bottom: 52px;
  left: 50%;
  transform: translateX(-50%);
  font-size: 0.72rem;
  color: rgba(0,0,0,0.3);
  pointer-events: none;
  letter-spacing: 0.03em;
}

.chat-shell {
  position: absolute;
  top: 48px;
  left: 12px;
  right: 12px;
  bottom: 12px;
  border-radius: 12px;
  border: 1px solid #cfcfcf;
  background: rgba(255, 255, 255, 0.95);
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.chat-note {
  font-size: 0.68rem;
  color: #444;
  padding: 0.45rem 0.7rem;
  border-bottom: 1px solid #dedede;
  background: #f5f5f5;
}

#giscus-thread {
  flex: 1;
  min-height: 0;
  overflow: auto;
  padding: 0.25rem 0.5rem 0.6rem;
}

.affiliate-strip {
  position: absolute;
  left: 10px;
  right: 10px;
  height: 34px;
  border: 1px solid rgba(0, 0, 0, 0.14);
  border-radius: 10px;
  overflow: hidden;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(2px);
  z-index: 3;
}

.affiliate-strip-top {
  top: 126px;
}

.affiliate-strip-bottom {
  bottom: 10px;
}

.affiliate-track {
  height: 100%;
  display: flex;
  width: max-content;
  align-items: center;
  animation: affiliate-scroll 34s linear infinite;
}

.affiliate-strip-bottom .affiliate-track {
  animation-direction: reverse;
}

.affiliate-strip:hover .affiliate-track {
  animation-play-state: paused;
}

.affiliate-lane {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  padding-right: 0.45rem;
}

.affiliate-chip {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  text-decoration: none;
  color: #0f3f5e;
  font-size: 0.66rem;
  font-weight: bold;
  line-height: 1;
  padding: 0.26rem 0.44rem;
  border-radius: 999px;
  border: 1px solid #b9d3e3;
  background: #f1f9ff;
  white-space: nowrap;
}

.affiliate-chip img {
  width: 18px;
  height: 18px;
  border-radius: 4px;
  object-fit: cover;
  flex: 0 0 auto;
  border: 1px solid rgba(0, 0, 0, 0.12);
}

.affiliate-chip span {
  display: inline-block;
}

.affiliate-chip:hover {
  border-color: #00a2ff;
  color: #005b94;
}

.affiliate-tag {
  display: inline-flex;
  align-items: center;
  font-size: 0.6rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: #1f5c7f;
  padding: 0.28rem 0.46rem;
  border-radius: 999px;
  background: #d9eefb;
  border: 1px solid #b8d8ea;
  white-space: nowrap;
}

.affiliate-disclosure {
  position: absolute;
  left: 50%;
  top: 164px;
  transform: translateX(-50%);
  z-index: 3;
  font-size: 0.62rem;
  color: rgba(25, 25, 25, 0.8);
  background: rgba(255, 255, 255, 0.85);
  border: 1px solid rgba(0, 0, 0, 0.1);
  border-radius: 999px;
  padding: 0.2rem 0.5rem;
  pointer-events: none;
  white-space: nowrap;
}

@keyframes affiliate-scroll {
  from { transform: translateX(0); }
  to { transform: translateX(-50%); }
}

/* Responsive */
@media screen and (max-width: 600px) {
  body {
    height: unset;
    min-height: 100vh;
    overflow-y: auto;
  }
  .container {
    flex-direction: column;
  }
  .title-row {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
  }
  .form-container {
    padding: 2rem 1rem;
    gap: 2rem;
  }
  .form {
    padding: 0 1rem;
  }
  .preset-layout {
    grid-template-columns: 1fr;
  }
  .field-container {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.5rem;
  }
  .field-container label {
    min-width: unset;
    font-size: 1rem;
  }
  .input-field {
    width: 100%;
    max-width: unset;
  }
  .canvas-container {
    height: 55vw;
    min-height: 260px;
  }
  .canvas-tabs {
    top: 6px;
  }
  .share-section-canvas {
    top: 40px;
    left: 6px;
    right: 6px;
    padding: 0.45rem;
    gap: 0.4rem;
  }
  .share-trigger {
    width: 100%;
    justify-content: center;
  }
  .share-panel {
    flex-basis: 100%;
    gap: 0.35rem;
  }
  .share-chip {
    font-size: 0.64rem;
    padding: 0.3rem 0.52rem;
  }
  .share-feedback {
    font-size: 0.64rem;
  }
  .affiliate-strip {
    left: 6px;
    right: 6px;
    height: 30px;
  }
  .affiliate-strip-top {
    top: 148px;
  }
  .affiliate-chip { font-size: 0.62rem; }
  .affiliate-disclosure {
    top: 184px;
    max-width: calc(100% - 16px);
    overflow: hidden;
    text-overflow: ellipsis;
  }
  .canvas-hint { bottom: 44px; }
  .chat-shell {
    top: 40px;
    left: 8px;
    right: 8px;
    bottom: 8px;
  }
}