:root {
  color-scheme: light;
  --ink: #14202a;
  --muted: #687584;
  --line: #dfd8cc;
  --paper: #fffdfa;
  --wash: #f5f1e9;
  --mint: #20a68d;
  --coral: #ff6b6f;
  --shadow: 0 18px 45px rgba(31, 35, 40, 0.10);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--ink);
  background:
    linear-gradient(135deg, rgba(32, 166, 141, 0.12), transparent 32%),
    linear-gradient(315deg, rgba(255, 107, 111, 0.12), transparent 30%),
    var(--wash);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft YaHei", sans-serif;
}

button,
input,
select {
  font: inherit;
}

button {
  cursor: pointer;
}

button:disabled {
  cursor: not-allowed;
  opacity: 0.55;
}

.app-shell {
  width: min(1180px, calc(100vw - 28px));
  margin: 0 auto;
  padding: 24px 0 42px;
}

.topbar {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 18px;
  margin-bottom: 18px;
}

.eyebrow {
  margin: 0 0 6px;
  color: #007a68;
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0;
}

h1,
h2,
h3,
p {
  margin: 0;
}

h1 {
  font-size: clamp(34px, 5vw, 58px);
  line-height: 1;
}

.subtitle {
  margin-top: 10px;
  color: #405060;
}

.member-box,
.auth-strip,
.work-panel,
.settings-panel,
.result-main,
.colors-panel,
.live-panel {
  border: 1px solid var(--line);
  background: rgba(255, 253, 250, 0.92);
  box-shadow: var(--shadow);
}

.member-box {
  min-width: 210px;
  padding: 14px 16px;
  border-radius: 8px;
}

.member-box strong,
.member-box span {
  display: block;
}

.member-box span {
  margin-top: 4px;
  color: var(--muted);
  font-size: 13px;
}

.auth-strip {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-bottom: 14px;
  padding: 14px;
  border-radius: 8px;
}

.auth-block {
  display: grid;
  grid-template-columns: 1fr 1fr auto;
  gap: 10px;
  align-items: end;
}

.auth-block:last-child {
  grid-template-columns: 1fr auto;
}

label span {
  display: block;
  margin-bottom: 6px;
  color: #50606f;
  font-size: 13px;
}

input,
select {
  width: 100%;
  height: 42px;
  border: 1px solid #d9d2c6;
  border-radius: 7px;
  background: #fff;
  color: var(--ink);
  padding: 0 12px;
  outline: none;
}

input:focus,
select:focus {
  border-color: var(--mint);
  box-shadow: 0 0 0 3px rgba(32, 166, 141, 0.14);
}

.auth-block button,
.soft-btn,
.ghost-btn {
  height: 42px;
  border: 1px solid #d9d2c6;
  border-radius: 7px;
  background: #fff;
  color: var(--ink);
  padding: 0 16px;
  font-weight: 700;
}

.page-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 380px;
  gap: 14px;
  align-items: start;
}

.work-panel,
.settings-panel,
.result-main,
.colors-panel {
  border-radius: 8px;
  overflow: hidden;
}

.panel-head,
.result-head,
.colors-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding: 18px;
  border-bottom: 1px solid var(--line);
}

.panel-head p,
.result-head p,
.colors-head p {
  margin-top: 6px;
  color: var(--muted);
  font-size: 14px;
}

.upload-box {
  display: grid;
  justify-items: center;
  gap: 8px;
  margin: 18px;
  padding: 34px 20px;
  border: 1px dashed #cbbfae;
  border-radius: 8px;
  background: #fff9f1;
  text-align: center;
}

.upload-box.dragging {
  border-color: var(--mint);
  background: rgba(32, 166, 141, 0.10);
}

.upload-box small {
  color: var(--muted);
}

.upload-plus {
  display: grid;
  place-items: center;
  width: 62px;
  height: 62px;
  border-radius: 999px;
  background: var(--coral);
  color: #fff;
  font-size: 34px;
  font-weight: 400;
}

#imageInput {
  position: absolute;
  inline-size: 1px;
  block-size: 1px;
  opacity: 0;
  pointer-events: none;
}

.source-preview {
  margin: 0 18px 18px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  overflow: hidden;
}

.source-preview img {
  display: block;
  width: 100%;
  max-height: 420px;
  object-fit: contain;
  background: #f2efe8;
}

.source-preview img:not([src]) {
  display: none;
}

.source-preview span {
  display: block;
  padding: 10px 12px;
  color: var(--muted);
  font-size: 14px;
}

.setting-section {
  padding: 18px;
  border-bottom: 1px solid var(--line);
}

.setting-section h3 {
  font-size: 17px;
  margin-bottom: 14px;
}

.section-title {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 14px;
}

.section-title h3 {
  margin: 0;
}

#sizeBadge,
#colorBadge {
  padding: 6px 12px;
  border-radius: 999px;
  background: rgba(32, 166, 141, 0.12);
  color: #00836e;
  font-weight: 800;
  font-size: 13px;
}

.range-row,
.select-row,
.switch-row {
  display: block;
  margin-top: 13px;
}

.range-row input {
  height: 24px;
  padding: 0;
  accent-color: var(--mint);
}

.field-grid,
.quick-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  margin-top: 12px;
}

.quick-grid button,
.segment button,
.tabs button {
  min-height: 42px;
  border: 1px solid #d9d2c6;
  border-radius: 7px;
  background: #fff;
  color: var(--ink);
  font-weight: 800;
}

.switch-row {
  display: flex;
  align-items: center;
  gap: 10px;
}

.switch-row input {
  width: 22px;
  height: 22px;
  accent-color: var(--mint);
}

.switch-row span {
  margin: 0;
  color: var(--ink);
}

.segment {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 6px;
  padding: 5px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #f2eee6;
}

.segment button,
.tabs button {
  border: 0;
  background: transparent;
}

.segment button.active,
.tabs button.active {
  background: #fff;
  color: var(--ink);
  box-shadow: 0 3px 10px rgba(31, 35, 40, 0.10);
}

.primary-btn {
  width: 100%;
  min-height: 46px;
  border: 0;
  border-radius: 7px;
  background: var(--coral);
  color: #fff;
  font-weight: 900;
}

.settings-panel > .primary-btn {
  margin: 18px;
  width: calc(100% - 36px);
}

.result-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 360px;
  gap: 14px;
  align-items: start;
}

.tabs {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-bottom: 1px solid var(--line);
}

.tabs button {
  border-radius: 0;
}

.tabs button.active {
  color: var(--coral);
  box-shadow: inset 0 -3px 0 var(--coral);
}

.canvas-card {
  display: block;
  width: calc(100% - 36px);
  margin: 18px;
  padding: 0;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  overflow: hidden;
}

.canvas-card canvas {
  display: block;
  width: 100%;
  max-height: 70vh;
  object-fit: contain;
  background: #fff;
}

#canvasHint {
  display: block;
  padding: 9px 12px;
  color: var(--muted);
  font-size: 13px;
  text-align: center;
}

.live-panel {
  margin: 18px;
  padding: 16px;
  border-radius: 8px;
  box-shadow: none;
}

.action-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  padding: 0 18px 18px;
}

.color-list {
  display: grid;
  gap: 10px;
  padding: 14px;
}

.color-item {
  display: grid;
  grid-template-columns: 42px 1fr auto;
  align-items: center;
  gap: 12px;
  padding: 10px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
}

.color-item.active {
  border-color: var(--coral);
  box-shadow: 0 0 0 3px rgba(255, 107, 111, 0.15);
}

.swatch {
  width: 40px;
  height: 40px;
  border: 1px solid rgba(0,0,0,0.12);
  border-radius: 6px;
}

.color-code {
  font-size: 20px;
  font-weight: 900;
}

.color-desc {
  color: var(--muted);
  font-size: 12px;
  margin-top: 2px;
}

.color-count {
  color: var(--coral);
  font-weight: 900;
  font-size: 17px;
}

.replace-link {
  display: inline-grid;
  place-items: center;
  min-width: 30px;
  height: 28px;
  margin-top: 6px;
  border-radius: 6px;
  background: var(--coral);
  color: #fff;
  font-size: 13px;
  font-weight: 900;
}

.preview-modal {
  position: fixed;
  inset: 0;
  z-index: 20;
  display: grid;
  place-items: center;
  padding: 58px 18px 18px;
  background: rgba(10, 15, 18, 0.82);
}

.preview-modal canvas {
  max-width: 100%;
  max-height: 100%;
  background: #fff;
}

.close-preview {
  position: fixed;
  top: 14px;
  right: 14px;
  z-index: 21;
  height: 40px;
  border: 0;
  border-radius: 999px;
  padding: 0 18px;
  background: #fff;
  font-weight: 800;
}

.toast {
  position: fixed;
  left: 50%;
  bottom: 24px;
  z-index: 30;
  transform: translateX(-50%);
  min-width: 180px;
  max-width: calc(100vw - 36px);
  padding: 12px 16px;
  border-radius: 999px;
  background: #111820;
  color: #fff;
  text-align: center;
  box-shadow: var(--shadow);
}

.hidden,
.hidden-canvas {
  display: none !important;
}

@media (max-width: 980px) {
  .topbar,
  .auth-strip,
  .page-grid,
  .result-layout {
    grid-template-columns: 1fr;
  }

  .topbar {
    display: grid;
  }

  .auth-block,
  .auth-block:last-child {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 560px) {
  .app-shell {
    width: min(430px, calc(100vw - 16px));
    padding-top: 14px;
  }

  h1 {
    font-size: 38px;
  }

  .field-grid,
  .quick-grid,
  .action-row {
    grid-template-columns: 1fr;
  }
}