/* ============================================================
   PixelGrid -- Precision Image Cropper
   Design: Dark gallery-tool aesthetic, pastel accents
   ============================================================ */

/* --- Design Tokens --- */
:root {
  /* Background layers */
  --bg-deep:        #111118;
  --bg-base:        #16161e;
  --bg-surface:     #1e1e28;
  --bg-raised:      #252532;
  --bg-hover:       #2c2c3a;

  /* Pastel accents */
  --accent:         #b8a9d4;   /* soft lavender */
  --accent-hover:   #c9bde2;
  --accent-muted:   #7e6fa8;
  --rose:           #d4a9b8;   /* dusty rose */
  --sage:           #a9d4b8;   /* muted sage */
  --peach:          #d4c1a9;   /* warm peach */
  --sky:            #a9c4d4;   /* soft sky */

  /* Text */
  --text-primary:   #e8e6f0;
  --text-secondary: #9994b0;
  --text-muted:     #65617a;

  /* Borders */
  --border:         #2a2a38;
  --border-hover:   #3a3a4c;
  --border-focus:   var(--accent-muted);

  /* Grid overlay */
  --grid-line:      rgba(184, 169, 212, 0.35);
  --grid-center:    rgba(212, 169, 184, 0.55);
  --grid-diagonal:  rgba(169, 196, 212, 0.25);

  /* Functional */
  --warning:        #d4a96a;
  --danger:         #d47a7a;
  --success:        var(--sage);

  /* Spacing */
  --header-h:       60px;
  --sidebar-w:      220px;
  --panel-w:        280px;
  --radius:         8px;
  --radius-sm:      5px;
  --radius-lg:      12px;

  /* Typography */
  --font-ui:        'DM Sans', system-ui, -apple-system, sans-serif;
  --font-mono:      'JetBrains Mono', 'SF Mono', 'Fira Code', monospace;

  /* Transitions */
  --ease:           cubic-bezier(0.25, 0.46, 0.45, 0.94);
  --duration:       180ms;
  --duration-slow:  320ms;
}

/* --- Reset & Base --- */
*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  font-size: 14px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-ui);
  background: var(--bg-deep);
  color: var(--text-primary);
  overflow: hidden;
  height: 100vh;
  width: 100vw;
}

/* --- Scrollbar --- */
::-webkit-scrollbar {
  width: 5px;
}
::-webkit-scrollbar-track {
  background: transparent;
}
::-webkit-scrollbar-thumb {
  background: var(--border-hover);
  border-radius: 10px;
}
::-webkit-scrollbar-thumb:hover {
  background: var(--text-muted);
}

/* --- App Shell --- */
.app {
  display: flex;
  flex-direction: column;
  height: 100vh;
  width: 100vw;
}

/* --- Header --- */
.header {
  height: var(--header-h);
  padding: 0 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--bg-base);
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
  z-index: 100;
}

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

.header__logo {
  color: var(--accent);
  opacity: 0.9;
}

.header__title {
  font-size: 1.15rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  background: linear-gradient(135deg, var(--accent), var(--rose));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.header__controls {
  display: flex;
  align-items: center;
  gap: 24px;
}

/* --- Size Input --- */
.size-input {
  display: flex;
  align-items: center;
  gap: 10px;
}

.size-input__label {
  font-size: 0.78rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  font-weight: 500;
}

.size-input__fields {
  display: flex;
  align-items: center;
  gap: 6px;
}

.size-input__field {
  position: relative;
  display: flex;
  align-items: center;
}

.size-input__field .input {
  width: 72px;
  padding-right: 22px;
}

.size-input__unit {
  position: absolute;
  right: 8px;
  font-size: 0.7rem;
  color: var(--text-muted);
  font-family: var(--font-mono);
  pointer-events: none;
}

.size-input__link {
  color: var(--text-muted);
  flex-shrink: 0;
}

.size-input__ratio {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--accent-muted);
  background: var(--bg-surface);
  padding: 3px 8px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  letter-spacing: 0.02em;
}

.size-input__lock {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border: 1px solid var(--border);
  background: var(--bg-surface);
  color: var(--text-muted);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--duration) var(--ease);
  padding: 0;
}

.size-input__lock:hover {
  border-color: var(--border-hover);
  color: var(--text-secondary);
}

.size-input__lock--active {
  color: var(--accent);
  border-color: var(--accent-muted);
  background: var(--bg-raised);
}

/* --- Tool Switcher --- */
.tool-switcher {
  display: flex;
  gap: 2px;
  background: var(--bg-surface);
  border-radius: var(--radius);
  padding: 3px;
  border: 1px solid var(--border);
}

.tool-btn {
  display: flex;
  align-items: center;
  gap: 5px;
  padding: 5px 12px;
  border: none;
  background: transparent;
  color: var(--text-muted);
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-family: var(--font-ui);
  font-size: 0.78rem;
  font-weight: 500;
  transition: all var(--duration) var(--ease);
}

.tool-btn:hover {
  color: var(--text-secondary);
  background: var(--bg-hover);
}

.tool-btn--active {
  color: var(--accent);
  background: var(--bg-raised);
  box-shadow: 0 1px 4px rgba(0,0,0,0.2);
}

/* --- Grid Toggles --- */
.grid-toggles {
  display: flex;
  gap: 2px;
  background: var(--bg-surface);
  border-radius: var(--radius);
  padding: 3px;
  border: 1px solid var(--border);
}

.toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border: none;
  background: transparent;
  color: var(--text-muted);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--duration) var(--ease);
}

.toggle:hover {
  color: var(--text-secondary);
  background: var(--bg-hover);
}

.toggle--active {
  color: var(--accent);
  background: var(--bg-raised);
  box-shadow: 0 1px 4px rgba(0,0,0,0.2);
}

.toggle--green.toggle--active {
  color: var(--sage);
}

/* --- Main Layout --- */
.main {
  display: flex;
  flex: 1;
  overflow: hidden;
  height: calc(100vh - var(--header-h));
}

/* --- Sidebar --- */
.sidebar {
  width: var(--sidebar-w);
  background: var(--bg-base);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
  transition: width var(--duration-slow) var(--ease);
}

.sidebar__header {
  padding: 14px 16px 10px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--border);
}

.sidebar__title {
  font-size: 0.82rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-secondary);
}

.sidebar__count {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-muted);
  background: var(--bg-surface);
  padding: 2px 7px;
  border-radius: 20px;
  min-width: 22px;
  text-align: center;
  margin-right: auto;
  margin-left: 6px;
}

.sidebar__clear {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 26px;
  height: 26px;
  border: none;
  background: transparent;
  color: var(--text-muted);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--duration) var(--ease);
}

.sidebar__clear:hover {
  color: var(--danger);
  background: rgba(212, 122, 122, 0.1);
}

.sidebar--dragover {
  background: var(--bg-surface);
  box-shadow: inset 0 0 0 2px var(--accent-muted);
}

.sidebar--dragover .sidebar__gallery {
  opacity: 0.5;
}

.sidebar__gallery {
  flex: 1;
  overflow-y: auto;
  padding: 8px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

/* Thumbnail */
.thumb {
  position: relative;
  border-radius: var(--radius);
  overflow: hidden;
  cursor: pointer;
  border: 2px solid transparent;
  transition: all var(--duration) var(--ease);
  aspect-ratio: 16 / 10;
  background: var(--bg-surface);
}

.thumb:hover {
  border-color: var(--border-hover);
  transform: translateY(-1px);
}

.thumb--active {
  border-color: var(--accent);
  box-shadow: 0 0 0 1px var(--accent-muted), 0 4px 12px rgba(0,0,0,0.3);
}

.thumb__img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.thumb__status {
  position: absolute;
  top: 5px;
  right: 5px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  border: 1.5px solid var(--bg-base);
}

.thumb__status--pending {
  background: var(--text-muted);
}

.thumb__status--cropped {
  background: var(--peach);
}

.thumb__status--done {
  background: var(--sage);
}

.thumb__name {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 3px 6px;
  background: linear-gradient(transparent, rgba(0,0,0,0.7));
  font-size: 0.65rem;
  color: rgba(255,255,255,0.7);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.thumb__remove {
  position: absolute;
  top: 3px;
  left: 3px;
  width: 18px;
  height: 18px;
  border: none;
  background: rgba(0,0,0,0.55);
  color: rgba(255,255,255,0.6);
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: all var(--duration) var(--ease);
  padding: 0;
}

.thumb:hover .thumb__remove {
  opacity: 1;
}

.thumb__remove:hover {
  background: var(--danger);
  color: #fff;
}

.sidebar__add {
  margin: 8px;
  padding: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  border: 1.5px dashed var(--border-hover);
  border-radius: var(--radius);
  background: transparent;
  color: var(--text-muted);
  font-family: var(--font-ui);
  font-size: 0.8rem;
  cursor: pointer;
  transition: all var(--duration) var(--ease);
}

.sidebar__add:hover {
  border-color: var(--accent-muted);
  color: var(--accent);
  background: var(--bg-surface);
}

/* --- Editor / Canvas Area --- */
.editor {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
  background:
    radial-gradient(ellipse at 30% 20%, rgba(184, 169, 212, 0.03) 0%, transparent 50%),
    radial-gradient(ellipse at 70% 80%, rgba(212, 169, 184, 0.02) 0%, transparent 50%),
    var(--bg-deep);
}

/* subtle checker pattern for transparency feel */
.editor::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(45deg, var(--bg-base) 25%, transparent 25%),
    linear-gradient(-45deg, var(--bg-base) 25%, transparent 25%),
    linear-gradient(45deg, transparent 75%, var(--bg-base) 75%),
    linear-gradient(-45deg, transparent 75%, var(--bg-base) 75%);
  background-size: 24px 24px;
  background-position: 0 0, 0 12px, 12px -12px, -12px 0;
  opacity: 0.15;
  pointer-events: none;
}

/* --- Drop Zone --- */
.dropzone {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  height: 100%;
  cursor: pointer;
  z-index: 10;
}

.dropzone__content {
  text-align: center;
  padding: 40px;
  border: 2px dashed var(--border-hover);
  border-radius: var(--radius-lg);
  background: var(--bg-surface);
  max-width: 480px;
  transition: all var(--duration-slow) var(--ease);
}

.dropzone:hover .dropzone__content,
.dropzone--dragover .dropzone__content {
  border-color: var(--accent);
  background: var(--bg-raised);
  transform: scale(1.02);
  box-shadow: 0 0 40px rgba(184, 169, 212, 0.08);
}

.dropzone__icon {
  color: var(--accent-muted);
  margin-bottom: 16px;
  transition: color var(--duration) var(--ease);
}

.dropzone:hover .dropzone__icon,
.dropzone--dragover .dropzone__icon {
  color: var(--accent);
}

.dropzone__title {
  font-size: 1.2rem;
  font-weight: 500;
  color: var(--text-primary);
  margin-bottom: 6px;
}

.dropzone__subtitle {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-bottom: 12px;
}

.dropzone__url {
  margin: 14px 0 8px;
  position: relative;
  z-index: 10;
}

.dropzone__url-row {
  display: flex;
  gap: 6px;
  align-items: center;
}

.input--url {
  flex: 1;
  font-size: 0.82rem;
  padding: 8px 12px;
  min-width: 0;
}

.btn--url {
  padding: 8px 16px;
  flex-shrink: 0;
}

.dropzone__url-error {
  font-size: 0.75rem;
  color: var(--danger);
  margin-top: 4px;
  min-height: 1.1em;
}

.dropzone__hint {
  font-size: 0.75rem;
  color: var(--text-muted);
}

.dropzone__input {
  display: none;
}

/* --- Workspace --- */
.workspace {
  position: relative;
  width: 100%;
  height: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  z-index: 10;
}

.workspace__canvas-wrap {
  position: relative;
  box-shadow: 0 8px 40px rgba(0,0,0,0.4), 0 2px 8px rgba(0,0,0,0.2);
  border-radius: 2px;
  overflow: hidden;
  cursor: crosshair;
}

.workspace__canvas-wrap canvas {
  display: block;
  position: absolute;
  top: 0;
  left: 0;
}

#mainCanvas {
  z-index: 1;
}

#overlayCanvas {
  z-index: 2;
}

.workspace__info {
  position: absolute;
  bottom: 16px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 8px;
  padding: 6px 10px;
  background: rgba(22, 22, 30, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-radius: 20px;
  border: 1px solid var(--border);
  z-index: 20;
}

.info-tag {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text-secondary);
  padding: 2px 8px;
  border-radius: 10px;
  background: var(--bg-surface);
  white-space: nowrap;
}

/* --- Right Panel --- */
.panel {
  width: var(--panel-w);
  background: var(--bg-base);
  border-left: 1px solid var(--border);
  flex-shrink: 0;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
}

.panel__section {
  padding: 16px;
  border-bottom: 1px solid var(--border);
}

.panel__section:last-child {
  border-bottom: none;
}

.panel__heading {
  font-size: 0.78rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-secondary);
  margin-bottom: 12px;
}

.panel__row {
  display: flex;
  gap: 8px;
  margin-bottom: 8px;
}

.panel__row:last-child {
  margin-bottom: 0;
}

.panel__field {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.panel__field label {
  font-size: 0.7rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  font-weight: 500;
}

.panel__field-hint {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: var(--text-muted);
}

.panel__message {
  font-size: 0.82rem;
  color: var(--text-muted);
  text-align: center;
  padding: 12px 0;
  font-style: italic;
}

.panel__warning {
  display: flex;
  align-items: flex-start;
  gap: 6px;
  padding: 8px 10px;
  border-radius: var(--radius-sm);
  background: rgba(212, 169, 106, 0.08);
  border: 1px solid rgba(212, 169, 106, 0.2);
  color: var(--warning);
  font-size: 0.75rem;
  margin-top: 8px;
  line-height: 1.4;
}

.panel__warning svg {
  flex-shrink: 0;
  margin-top: 1px;
}

/* Blur regions list */
.panel__blur-list {
  margin-bottom: 8px;
  max-height: 120px;
  overflow-y: auto;
}

.blur-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 4px 8px;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text-secondary);
  background: var(--bg-surface);
  border-radius: var(--radius-sm);
  margin-bottom: 3px;
  border: 1px solid var(--border);
}

.blur-item__info {
  opacity: 0.7;
}

/* Preview toggle */
.panel__preview-toggle {
  display: flex;
  gap: 2px;
  background: var(--bg-surface);
  border-radius: var(--radius);
  padding: 2px;
  margin-bottom: 10px;
  border: 1px solid var(--border);
}

.panel__preview-toggle .btn {
  flex: 1;
  font-size: 0.75rem;
  padding: 5px 8px;
}

.panel__preview-box {
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--bg-surface);
  border: 1px solid var(--border);
  aspect-ratio: 16 / 10;
  position: relative;
}

.panel__preview-box canvas {
  width: 100%;
  height: 100%;
  display: block;
  object-fit: contain;
}

.panel__resize-x {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
  flex-shrink: 0;
  padding: 0 2px;
}

/* Quality label */
.panel__quality-label {
  font-size: 0.78rem;
  color: var(--text-secondary);
  margin-bottom: 4px;
}

.panel__quality-label span {
  font-family: var(--font-mono);
  color: var(--accent);
}

/* --- Form Elements --- */
.input {
  font-family: var(--font-ui);
  font-size: 0.85rem;
  color: var(--text-primary);
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 7px 10px;
  outline: none;
  transition: all var(--duration) var(--ease);
  width: 100%;
}

.input:focus {
  border-color: var(--border-focus);
  box-shadow: 0 0 0 2px rgba(184, 169, 212, 0.12);
}

.input:hover:not(:focus) {
  border-color: var(--border-hover);
}

.input--mono {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: -0.01em;
}

.input--sm {
  padding: 5px 8px;
  font-size: 0.78rem;
}

.input--select {
  cursor: pointer;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg width='10' height='6' viewBox='0 0 10 6' fill='none' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M1 1L5 5L9 1' stroke='%2365617a' stroke-width='1.5' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 10px center;
  padding-right: 28px;
}

/* Remove number input arrows */
input[type="number"]::-webkit-outer-spin-button,
input[type="number"]::-webkit-inner-spin-button {
  -webkit-appearance: none;
  margin: 0;
}
input[type="number"] {
  -moz-appearance: textfield;
}

/* --- Buttons --- */
.btn {
  font-family: var(--font-ui);
  font-size: 0.82rem;
  font-weight: 500;
  padding: 8px 16px;
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  transition: all var(--duration) var(--ease);
  white-space: nowrap;
}

.btn--primary {
  background: var(--accent);
  color: var(--bg-deep);
}

.btn--primary:hover {
  background: var(--accent-hover);
  box-shadow: 0 2px 12px rgba(184, 169, 212, 0.25);
}

.btn--secondary {
  background: var(--bg-surface);
  color: var(--text-secondary);
  border: 1px solid var(--border);
}

.btn--secondary:hover {
  background: var(--bg-hover);
  color: var(--text-primary);
  border-color: var(--border-hover);
}

.btn--ghost {
  background: transparent;
  color: var(--text-muted);
  padding: 5px 10px;
  border-radius: var(--radius-sm);
}

.btn--ghost:hover {
  background: var(--bg-hover);
  color: var(--text-secondary);
}

.btn--ghost.btn--active {
  background: var(--bg-raised);
  color: var(--accent);
}

.btn--full {
  width: 100%;
}

.btn:active {
  transform: scale(0.97);
}

/* --- Range Slider --- */
.slider {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 4px;
  border-radius: 2px;
  background: var(--bg-raised);
  outline: none;
  cursor: pointer;
}

.slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--accent);
  border: 2px solid var(--bg-base);
  cursor: pointer;
  transition: box-shadow var(--duration) var(--ease);
}

.slider::-webkit-slider-thumb:hover {
  box-shadow: 0 0 0 4px rgba(184, 169, 212, 0.15);
}

.slider::-moz-range-thumb {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--accent);
  border: 2px solid var(--bg-base);
  cursor: pointer;
}

/* --- Animations --- */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(6px); }
  to   { opacity: 1; transform: translateY(0); }
}

@keyframes scaleIn {
  from { opacity: 0; transform: scale(0.95); }
  to   { opacity: 1; transform: scale(1); }
}

@keyframes slideInLeft {
  from { opacity: 0; transform: translateX(-12px); }
  to   { opacity: 1; transform: translateX(0); }
}

@keyframes slideInRight {
  from { opacity: 0; transform: translateX(12px); }
  to   { opacity: 1; transform: translateX(0); }
}

.animate-fade { animation: fadeIn var(--duration-slow) var(--ease) both; }
.animate-scale { animation: scaleIn var(--duration-slow) var(--ease) both; }
.animate-slide-left { animation: slideInLeft var(--duration-slow) var(--ease) both; }
.animate-slide-right { animation: slideInRight var(--duration-slow) var(--ease) both; }

/* Stagger children */
.stagger > *:nth-child(1) { animation-delay: 0ms; }
.stagger > *:nth-child(2) { animation-delay: 40ms; }
.stagger > *:nth-child(3) { animation-delay: 80ms; }
.stagger > *:nth-child(4) { animation-delay: 120ms; }
.stagger > *:nth-child(5) { animation-delay: 160ms; }
.stagger > *:nth-child(6) { animation-delay: 200ms; }

/* --- Responsive hints --- */
@media (max-width: 1100px) {
  :root {
    --sidebar-w: 170px;
    --panel-w: 240px;
  }
}

@media (max-width: 900px) {
  .sidebar { display: none; }
  :root {
    --panel-w: 240px;
  }
}