:root {
  --bg: #0f1117;
  --bg-2: #161a23;
  --bg-3: #1e2430;
  --panel: #171b25;
  --panel-2: #1c2230;
  --border: #2a3140;
  --border-2: #333c4d;
  --text: #e7eaf0;
  --text-dim: #9aa4b5;
  --text-faint: #6b7688;
  --brand: #a855f7;
  --brand-2: #7c3aed;
  --brand-soft: rgba(168, 85, 247, 0.15);
  --danger: #ef4444;
  --ok: #22c55e;
  --warn: #f59e0b;
  --radius: 10px;
  --radius-sm: 7px;
  --shadow: 0 6px 24px rgba(0, 0, 0, 0.35);
  --font:
    -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial,
    sans-serif;
  --mono: ui-monospace, "SFMono-Regular", "Consolas", monospace;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
  height: 100%;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: 14px;
}

body {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

h1,
h2 {
  margin: 0;
  font-weight: 650;
}
p {
  margin: 0;
}
button {
  font-family: inherit;
  cursor: pointer;
}
input,
select,
textarea {
  font-family: inherit;
}

/* ---------- Header ---------- */
.app-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 10px 18px;
  background: linear-gradient(180deg, var(--bg-2), var(--bg));
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 30;
}
.brand {
  display: flex;
  align-items: center;
  gap: 12px;
}
.brand-logo {
  display: inline-flex;
  filter: drop-shadow(0 2px 6px rgba(124, 58, 237, 0.4));
}
.brand-text h1 {
  font-size: 17px;
  letter-spacing: 0.2px;
}
.brand-text p {
  font-size: 12px;
  color: var(--text-dim);
}
.header-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

/* ---------- Layout ---------- */
.layout {
  flex: 1;
  display: grid;
  grid-template-columns: 280px 1fr 270px;
  gap: 10px;
  padding: 10px;
  align-items: start;
  min-height: 0;
}
.sidebar {
  display: flex;
  flex-direction: column;
  gap: 10px;
  position: sticky;
  top: 70px;
}
.canvas-area {
  display: flex;
  flex-direction: column;
  gap: 8px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 10px;
  min-height: 70vh;
}

/* ---------- Panels ---------- */
.panel {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 10px;
}
.panel-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 6px;
  gap: 8px;
}
.panel-head h2 {
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.6px;
  color: var(--text-dim);
}
.hint {
  color: var(--text-faint);
  font-size: 12px;
}
.badge {
  background: var(--brand-soft);
  color: var(--brand);
  border-radius: 20px;
  padding: 1px 9px;
  font-size: 12px;
  font-weight: 600;
}

/* ---------- Form controls ---------- */
label {
  font-size: 12px;
  color: var(--text-dim);
}
input[type="number"],
input[type="text"],
input[type="password"],
input[type="search"],
select,
textarea {
  width: 100%;
  background: var(--bg-3);
  border: 1px solid var(--border-2);
  color: var(--text);
  border-radius: var(--radius-sm);
  padding: 6px 8px;
  font-size: 13px;
  outline: none;
  margin-top: 4px;
}
input:focus,
select:focus,
textarea:focus {
  border-color: var(--brand);
  box-shadow: 0 0 0 3px var(--brand-soft);
}
textarea {
  resize: vertical;
}

.grid-size-row {
  display: flex;
  align-items: flex-end;
  gap: 8px;
  flex-wrap: wrap;
}
.grid-size-row label {
  flex: 1;
  min-width: 78px;
}
.grid-size-row .times {
  color: var(--text-faint);
  padding-bottom: 8px;
}
.grid-size-row .hint {
  flex-basis: 100%;
}

.select-label,
.area-label,
.slider-label {
  display: block;
  margin-top: 6px;
}
.slider-label {
  color: var(--text-dim);
  font-size: 12px;
}
.slider-label input[type="range"] {
  width: 100%;
  margin-top: 6px;
  accent-color: var(--brand);
}
.field-row {
  display: flex;
  gap: 8px;
  align-items: flex-end;
}
.field-row .full {
  flex: 1;
}

/* ---------- Buttons ---------- */
.btn-primary,
.btn-secondary,
.btn-ghost {
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  padding: 7px 12px;
  font-size: 13px;
  font-weight: 600;
  transition:
    filter 0.15s,
    background 0.15s,
    border-color 0.15s;
}
.btn-primary {
  background: linear-gradient(180deg, var(--brand), var(--brand-2));
  color: #fff;
}
.btn-primary:hover {
  filter: brightness(1.08);
}
.btn-primary:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  filter: none;
}
.btn-secondary {
  background: var(--bg-3);
  color: var(--text);
  border-color: var(--border-2);
}
.btn-secondary:hover {
  border-color: var(--brand);
  color: #fff;
}
.btn-ghost {
  background: transparent;
  color: var(--text-dim);
  border-color: var(--border-2);
}
.btn-ghost:hover {
  color: #fff;
  border-color: var(--brand);
}
.full {
  width: 100%;
  margin-top: 8px;
}
.btn-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}

/* ---------- Tabs ---------- */
.tabs {
  display: flex;
  gap: 4px;
  background: var(--bg-3);
  padding: 4px;
  border-radius: var(--radius-sm);
  margin-bottom: 8px;
}
.tab {
  flex: 1;
  background: transparent;
  color: var(--text-dim);
  border: none;
  padding: 7px;
  border-radius: 6px;
  font-size: 12px;
  font-weight: 600;
}
.tab.active {
  background: var(--brand-soft);
  color: var(--brand);
}

/* ---------- Drop zone ---------- */
.drop-zone {
  position: relative;
  border: 1.5px dashed var(--border-2);
  border-radius: var(--radius);
  padding: 12px;
  text-align: center;
  color: var(--text-dim);
  background: var(--bg-2);
  transition:
    border-color 0.15s,
    background 0.15s;
  cursor: pointer;
  min-height: 100px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.drop-zone.dragover {
  border-color: var(--brand);
  background: var(--brand-soft);
}
.drop-icon {
  font-size: 28px;
  display: block;
  margin-bottom: 6px;
}
.drop-zone p {
  font-size: 12px;
}
#uploadPreview {
  max-width: 100%;
  max-height: 180px;
  border-radius: 8px;
  object-fit: contain;
}

/* ---------- Selected yarn + palette ---------- */
.selected-yarn {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 10px;
}
.swatch {
  width: 20px;
  height: 20px;
  border-radius: 5px;
  display: inline-block;
  border: 1px solid rgba(255, 255, 255, 0.25);
  flex-shrink: 0;
}
.swatch.lg {
  width: 34px;
  height: 34px;
  border-radius: 8px;
}
.selected-yarn strong {
  display: block;
  font-size: 13px;
  color: var(--text);
}

.palette-groups {
  max-height: 260px;
  overflow-y: auto;
  padding-right: 4px;
}
.palette-family {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--text-faint);
  margin: 8px 0 4px;
}
.swatch-grid {
  display: grid;
  grid-template-columns: repeat(9, 1fr);
  gap: 5px;
}
.swatch-btn {
  aspect-ratio: 1;
  border-radius: 5px;
  border: 2px solid transparent;
  padding: 0;
  cursor: pointer;
  position: relative;
}
.swatch-btn:hover {
  transform: scale(1.12);
}
.swatch-btn.selected {
  border-color: #fff;
  box-shadow: 0 0 0 2px var(--brand);
}

/* ---------- Code format selector ---------- */
.code-formats {
  display: flex;
  flex-direction: column;
  gap: 1px;
  margin-bottom: 10px;
}
.code-format-row {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 4px 8px;
  border-radius: 5px;
  cursor: pointer;
  border: 1px solid transparent;
  background: transparent;
  width: 100%;
  text-align: left;
  color: var(--text-dim);
  font-size: 11px;
  transition:
    background 0.1s,
    border-color 0.1s,
    color 0.1s;
}
.code-format-row:hover {
  background: var(--bg-3);
  border-color: var(--border);
  color: var(--text);
}
.code-format-row.active {
  background: var(--brand-soft);
  border-color: var(--brand);
  color: var(--brand);
}
.cfmt-label {
  width: 36px;
  flex-shrink: 0;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.3px;
  color: var(--text-faint);
}
.code-format-row.active .cfmt-label {
  color: var(--brand);
  opacity: 0.8;
}
.cfmt-value {
  font-family: var(--mono);
  font-size: 11.5px;
}

/* ---------- Canvas ---------- */
.canvas-toolbar {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  padding: 6px 4px;
  border-bottom: 1px solid var(--border);
}
.tool-group {
  display: flex;
  align-items: center;
  gap: 6px;
}
.tool-group.right {
  margin-left: auto;
}
.tool {
  background: var(--bg-3);
  color: var(--text-dim);
  border: 1px solid var(--border-2);
  border-radius: 6px;
  padding: 6px 10px;
  font-size: 12px;
  font-weight: 600;
}
.tool:hover {
  color: #fff;
  border-color: var(--brand);
}
.tool.active {
  background: var(--brand-soft);
  color: var(--brand);
  border-color: var(--brand);
}
.tool.danger:hover {
  border-color: var(--danger);
  color: var(--danger);
}
.zoom-level {
  font-size: 12px;
  color: var(--text-dim);
  min-width: 42px;
  text-align: center;
}
.check {
  display: flex;
  align-items: center;
  gap: 5px;
  font-size: 12px;
  color: var(--text-dim);
}
.check input {
  accent-color: var(--brand);
}

.canvas-wrap {
  position: relative;
  flex: 1;
  overflow: auto;
  background:
    linear-gradient(45deg, #12151d 25%, transparent 25%),
    linear-gradient(-45deg, #12151d 25%, transparent 25%),
    linear-gradient(45deg, transparent 75%, #12151d 75%),
    linear-gradient(-45deg, transparent 75%, #12151d 75%);
  background-size: 20px 20px;
  background-position:
    0 0,
    0 10px,
    10px -10px,
    -10px 0;
  background-color: #0c0e14;
  border-radius: 8px;
  min-height: 55vh;
  display: flex;
  align-items: flex-start;
  justify-content: flex-start;
}
#stitchCanvas {
  image-rendering: pixelated;
  display: block;
  margin: auto;
}
.canvas-empty {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  color: var(--text-faint);
  padding: 20px;
}
.empty-cross {
  font-size: 46px;
  color: var(--brand);
  opacity: 0.6;
  margin-bottom: 10px;
}

.canvas-info {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  align-items: center;
  font-size: 12px;
  color: var(--text-dim);
  padding: 2px 4px;
}
.canvas-info .paint-hint {
  margin-left: auto;
  color: var(--text-faint);
}

/* ---------- Legend ---------- */
.legend-list {
  display: flex;
  flex-direction: column;
  gap: 4px;
  max-height: 320px;
  overflow-y: auto;
  margin-top: 8px;
}
.legend-row {
  display: flex;
  align-items: center;
  gap: 9px;
  padding: 6px 8px;
  border-radius: 7px;
  background: var(--bg-2);
  border: 1px solid transparent;
  cursor: pointer;
}
.legend-row:hover {
  border-color: var(--border-2);
}
.legend-row.selected {
  border-color: var(--brand);
  background: var(--brand-soft);
}
.legend-row .code {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--text-dim);
  width: 34px;
}
.legend-row .name {
  flex: 1;
  font-size: 12px;
  color: var(--text);
}
.legend-row .count {
  font-size: 12px;
  color: var(--text-dim);
  font-variant-numeric: tabular-nums;
}
.legend-empty {
  color: var(--text-faint);
  font-size: 12px;
  padding: 10px 4px;
}
.buy-yarn {
  display: block;
  text-align: center;
  text-decoration: none;
  margin-top: 10px;
}

/* ---------- Projects ---------- */
.save-row {
  display: flex;
  gap: 8px;
}
.save-row input {
  flex: 1;
}
.project-list {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-top: 10px;
  max-height: 220px;
  overflow-y: auto;
}
.project-row {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px;
  background: var(--bg-2);
  border-radius: 7px;
  border: 1px solid var(--border);
}
.project-row .p-main {
  flex: 1;
  min-width: 0;
}
.project-row .p-title {
  font-size: 13px;
  color: var(--text);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.project-row .p-meta {
  font-size: 11px;
  color: var(--text-faint);
}
.icon-btn {
  background: transparent;
  border: none;
  color: var(--text-dim);
  font-size: 15px;
  padding: 4px 6px;
  border-radius: 5px;
}
.icon-btn:hover {
  color: #fff;
  background: var(--bg-3);
}
.icon-btn.danger:hover {
  color: var(--danger);
}

/* ---------- Toast ---------- */
.toast {
  position: fixed;
  bottom: 22px;
  left: 50%;
  transform: translateX(-50%) translateY(20px);
  background: var(--bg-3);
  color: var(--text);
  border: 1px solid var(--border-2);
  padding: 11px 18px;
  border-radius: 10px;
  box-shadow: var(--shadow);
  opacity: 0;
  pointer-events: none;
  transition:
    opacity 0.2s,
    transform 0.2s;
  z-index: 100;
  max-width: 90vw;
}
.toast.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}
.toast.ok {
  border-color: var(--ok);
}
.toast.error {
  border-color: var(--danger);
}
.toast.warn {
  border-color: var(--warn);
}

.ai-status {
  font-size: 12px;
  margin-top: 8px;
  min-height: 16px;
}
.ai-status.busy {
  color: var(--brand);
}
.ai-status.error {
  color: var(--danger);
}
.ai-status.ok {
  color: var(--ok);
}
.mini-search {
  max-width: 110px;
  margin-top: 0;
  padding: 5px 8px;
  font-size: 12px;
}

.auto-size-btn {
  padding: 5px 9px;
  font-size: 12px;
  align-self: flex-end;
  margin-bottom: 1px;
  flex-shrink: 0;
}

/* Aspect ratio lock button */
.ar-lock-btn {
  background: var(--bg-3);
  border: 1px solid var(--border-2);
  border-radius: 5px;
  padding: 4px 7px;
  color: var(--text-faint);
  cursor: pointer;
  align-self: flex-end;
  margin-bottom: 1px;
  flex-shrink: 0;
  transition:
    border-color 0.15s,
    color 0.15s,
    background 0.15s;
  line-height: 1;
}
.ar-lock-btn:hover {
  border-color: var(--brand);
  color: var(--text);
}
.ar-lock-btn.locked {
  border-color: var(--brand);
  background: var(--brand-soft);
  color: var(--brand);
}

/* ---------- Modals ---------- */
.app-modal {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.6);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 200;
  padding: 20px;
}
.app-modal.active {
  display: flex;
}
.app-modal-dialog {
  background: var(--panel);
  border: 1px solid var(--border-2);
  border-radius: 14px;
  width: 100%;
  max-width: 460px;
  box-shadow: var(--shadow);
  overflow: hidden;
}
.app-modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 18px;
  border-bottom: 1px solid var(--border);
}
.app-modal-header h2 {
  font-size: 16px;
}
.app-modal-body {
  padding: 18px;
}
.help-steps {
  margin: 0 0 12px;
  padding-left: 18px;
  display: flex;
  flex-direction: column;
  gap: 7px;
  font-size: 13px;
  color: var(--text-dim);
}
.help-steps strong {
  color: var(--text);
}

/* ---------- Auth widget ---------- */
.auth-header {
  display: flex;
  align-items: center;
  gap: 8px;
}
.auth-chip-wrap {
  position: relative;
}
.auth-chip {
  background: var(--bg-3);
  color: var(--text);
  border: 1px solid var(--border-2);
  border-radius: 20px;
  padding: 6px 12px;
  font-size: 12px;
  font-weight: 600;
}
.auth-chip-guest {
  border-color: var(--warn);
}
.auth-menu {
  position: absolute;
  right: 0;
  top: 110%;
  background: var(--panel);
  border: 1px solid var(--border-2);
  border-radius: 10px;
  min-width: 160px;
  display: none;
  flex-direction: column;
  overflow: hidden;
  box-shadow: var(--shadow);
  z-index: 40;
}
.auth-menu.open {
  display: flex;
}
.auth-menu-item {
  background: transparent;
  border: none;
  color: var(--text);
  text-align: left;
  padding: 10px 14px;
  font-size: 13px;
  text-decoration: none;
}
.auth-menu-item:hover {
  background: var(--bg-3);
}
.auth-menu-danger {
  color: var(--danger);
}
.auth-signin-btn {
  border-radius: 20px;
}
.auth-form {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-top: 12px;
}
.auth-field {
  display: flex;
  flex-direction: column;
  gap: 3px;
}
.auth-label {
  font-size: 12px;
  color: var(--text-dim);
}
.auth-input {
  width: 100%;
  background: var(--bg-3);
  border: 1px solid var(--border-2);
  color: var(--text);
  border-radius: 7px;
  padding: 9px 11px;
}
.auth-tabs {
  display: flex;
  gap: 4px;
  background: var(--bg-3);
  padding: 4px;
  border-radius: 8px;
  margin-top: 12px;
}
.auth-tab {
  flex: 1;
  background: transparent;
  color: var(--text-dim);
  border: none;
  padding: 8px;
  border-radius: 6px;
  font-weight: 600;
  font-size: 13px;
}
.auth-tab.active {
  background: var(--brand-soft);
  color: var(--brand);
}
.auth-error {
  color: var(--danger);
  font-size: 12px;
  display: none;
  margin-top: 8px;
}
.auth-submit {
  margin-top: 6px;
}
.auth-intro {
  font-size: 13px;
  color: var(--text-dim);
}
.auth-remember {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  color: var(--text-dim);
}
.auth-guest-section {
  margin-top: 14px;
  border-top: 1px solid var(--border);
  padding-top: 12px;
}
.auth-guest-note {
  font-size: 12px;
  color: var(--text-faint);
  margin-bottom: 8px;
}
.auth-guest-btn {
  width: 100%;
  background: var(--bg-3);
  border: 1px solid var(--border-2);
  color: var(--text);
  border-radius: 7px;
  padding: 9px;
  font-weight: 600;
}

/* Auth gate (full-screen when auth required) */
.auth-gate {
  position: fixed;
  inset: 0;
  background: var(--bg);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 150;
  transition: opacity 0.4s;
}
.auth-gate-fading {
  opacity: 0;
}
.auth-gate-card {
  text-align: center;
  padding: 40px;
}
.auth-gate-logo {
  width: 64px;
  height: 64px;
  border-radius: 16px;
  background: linear-gradient(135deg, var(--brand), var(--brand-2));
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 18px;
  font-weight: 800;
  font-size: 22px;
  color: #fff;
}
.auth-gate-title {
  font-size: 24px;
}
.auth-gate-sub {
  color: var(--text-dim);
  margin: 6px 0 20px;
}
.auth-passkey-section {
  margin-top: 14px;
}
.auth-divider {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--text-faint);
  font-size: 12px;
  margin-bottom: 10px;
}
.auth-divider::before,
.auth-divider::after {
  content: "";
  flex: 1;
  border-top: 1px solid var(--border);
}
body.modal-open {
  overflow: hidden;
}

/* ---------- Responsive ---------- */
@media (max-width: 1100px) {
  .layout {
    grid-template-columns: 1fr;
  }
  .sidebar {
    position: static;
  }
  .sidebar.right {
    order: 3;
  }
  .canvas-area {
    order: 2;
  }
}
::-webkit-scrollbar {
  width: 10px;
  height: 10px;
}
::-webkit-scrollbar-thumb {
  background: var(--border-2);
  border-radius: 6px;
}
::-webkit-scrollbar-track {
  background: transparent;
}