/* ==== GLOBAL RESET & THEME ==== */
* {
  box-sizing: border-box;
}

:root {
  --bg-main: #05010b;
  --bg-panel: #050814;
  --bg-panel-elevated: #080c1c;
  --border-cyan: #00eaff;
  --border-pink: #ff2dac;
  --accent-cyan: #33f4ff;
  --accent-pink: #ff4fd8;
  --accent-soft: #7b7bff;
  --text-main: #f9fafb;
  --text-muted: #9ca3af;
  --danger: #ff4b81;
  --shadow-neon: 0 0 18px rgba(0, 234, 255, 0.3);
  --shadow-neon-pink: 0 0 18px rgba(255, 77, 216, 0.35);
  --radius-panel: 14px;
  --radius-inner: 10px;
  --transition-fast: 0.18s ease-out;
  --font-display: "Orbitron", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-body: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font-body);
  background:
    radial-gradient(circle at top left, rgba(255, 45, 172, 0.16), transparent 55%),
    radial-gradient(circle at bottom right, rgba(0, 234, 255, 0.18), transparent 60%),
    #020008;
  color: var(--text-main);
}

body::before {
  content: "";
  pointer-events: none;
  position: fixed;
  inset: 0;
  opacity: 0.18;
  background-image:
    linear-gradient(to bottom, rgba(255,255,255,0.05) 1px, transparent 1px),
    radial-gradient(circle, rgba(255,255,255,0.04) 0, transparent 60%);
  background-size: 100% 2px, 300px 300px;
  mix-blend-mode: soft-light;
}

/* ==== APP CONTAINER ==== */
.app {
  max-width: 1200px;
  margin: 0 auto;
  padding: 24px 16px 40px;
}

/* ==== HEADER ==== */
.app-header h1 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  font-size: 1.6rem;
  color: var(--accent-cyan);
  text-shadow:
    0 0 14px rgba(0, 234, 255, 0.68),
    0 0 30px rgba(255, 77, 216, 0.4);
}

.app-header p {
  margin: 6px 0 20px;
  color: var(--text-muted);
  font-size: 0.9rem;
}

/* ==== LAYOUT: TOP ROW ==== */
.app-main {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}

/* ==== PANEL / CARD HUD STYLE ==== */
.panel {
  flex: 1 1 320px;
  background: radial-gradient(circle at top, rgba(255,77,216,0.1), transparent 55%) var(--bg-panel);
  border-radius: var(--radius-panel);
  padding: 14px 14px 16px;
  position: relative;
  overflow: hidden;
  border: 1px solid rgba(0, 234, 255, 0.35);
  box-shadow:
    0 0 0 1px rgba(5, 10, 30, 0.7),
    0 18px 35px rgba(0, 0, 0, 0.85);
}

.panel::before,
.panel::after {
  content: "";
  position: absolute;
  width: 32px;
  height: 32px;
  border-radius: 4px;
  border: 2px solid transparent;
}

.panel::before {
  top: 4px;
  left: 4px;
  border-top-color: var(--border-cyan);
  border-left-color: var(--border-cyan);
}

.panel::after {
  bottom: 4px;
  right: 4px;
  border-bottom-color: var(--border-pink);
  border-right-color: var(--border-pink);
}

.panel-full {
  margin-top: 18px;
}

.panel h2 {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.9rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent-pink);
  display: flex;
  align-items: center;
  gap: 10px;
}

.panel h2::before {
  content: "";
  width: 32px;
  height: 2px;
  background: linear-gradient(to right, var(--border-cyan), transparent);
}

.panel h2::after {
  content: "";
  flex: 1;
  height: 1px;
  opacity: 0.4;
  background: linear-gradient(to right, rgba(255,77,216,0.6), transparent);
}

.panel .image-box {
  flex: 1 1 auto;
}

/* ==== CONTROLS ROW (STEP 3) ==== */
.controls {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
  margin-bottom: 10px;
}

.controls label {
  font-size: 0.8rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-family: var(--font-display);
}

.controls select#layerCount {
  min-width: 80px;
  padding-right: 32px;
}

.controls select {
  padding: 4px 10px;
}

/* ==== SIZE & CROP CONTROLS (STEP 1) ==== */
.size-controls {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 8px;
}

/* ROW 1: width + height + unit all on one line */
.size-fields {
  display: flex;
  flex-wrap: nowrap;
  gap: 6px;
  align-items: flex-end;
  width: 100%;
}

.size-fields label {
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--text-muted);
  display: flex;
  flex-direction: column;
  gap: 3px;
  font-family: var(--font-display);
  flex: 1 1 0;
  min-width: 0;
}

.size-fields input[type="number"] {
  width: 100%;
  min-width: 0;
  padding: 6px 6px 6px 8px;
}

.size-fields select,
#sizeUnit {
  width: 100%;
  min-width: 0;
  padding: 6px 26px 6px 8px;
}

/* ROW 2: zoom slider + fix image button on same line */
.size-actions {
  display: flex;
  flex-wrap: nowrap;
  gap: 10px;
  align-items: center;
  margin-top: 0;
}

.zoom-control {
  display: flex;
  flex-direction: column;
  gap: 3px;
  flex: 1 1 auto;
  min-width: 0;
}

.zoom-control label {
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--text-muted);
  font-family: var(--font-display);
}

/* Lock aspect */
.lock-label {
  display: flex;
  align-items: center;
  gap: 4px;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--text-muted);
  font-family: var(--font-display);
}

/* Hide lock hint text */
.lock-hint,
.size-hint {
  display: none;
}

/* ==== SLIDERS ==== */
input[type="range"] {
  -webkit-appearance: none;
  width: 100%;
  background: transparent;
}

input[type="range"]::-webkit-slider-runnable-track {
  height: 4px;
  border-radius: 999px;
  background: linear-gradient(to right, var(--accent-cyan), var(--accent-pink));
}

input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: #05010b;
  border: 2px solid var(--accent-cyan);
  box-shadow: var(--shadow-neon);
  margin-top: -5px;
}

input[type="range"]::-moz-range-track {
  height: 4px;
  border-radius: 999px;
  background: linear-gradient(to right, var(--accent-cyan), var(--accent-pink));
}

input[type="range"]::-moz-range-thumb {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: #05010b;
  border: 2px solid var(--accent-cyan);
  box-shadow: var(--shadow-neon);
}

/* ==== INPUTS & SELECTS GENERAL ==== */
input[type="number"],
select {
  background: rgba(3, 8, 30, 0.9);
  border-radius: 0;
  border: 1px solid rgba(0, 234, 255, 0.7);
  color: var(--text-main);
  font-size: 0.8rem;
  outline: none;
  position: relative;
  font-family: var(--font-display);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  transition:
    border-color var(--transition-fast),
    box-shadow var(--transition-fast),
    background var(--transition-fast),
    transform 0.08s ease-out;
}

.size-fields input[type="number"],
.size-fields select,
.controls select {
  transform: skewX(-10deg);
}

input[type="number"]:focus,
select:focus {
  border-color: var(--accent-pink);
  box-shadow: var(--shadow-neon-pink);
  background: rgba(5, 13, 40, 0.95);
}

select {
  -webkit-appearance: none;
  -moz-appearance: none;
  appearance: none;
  background-image:
    linear-gradient(45deg, var(--accent-cyan) 50%, transparent 50%),
    linear-gradient(-45deg, var(--accent-cyan) 50%, transparent 50%);
  background-position:
    calc(100% - 16px) 52%,
    calc(100% - 10px) 52%;
  background-size: 6px 6px, 6px 6px;
  background-repeat: no-repeat;
}

input[type="checkbox"] {
  accent-color: var(--accent-pink);
}

/* ==== FILE INPUT ==== */
input[type="file"] {
  position: absolute;
  inset: 0;
  opacity: 0;
  cursor: pointer;
}

/* ==== BUTTONS ==== */
button,
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 8px 18px;
  border-radius: 0;
  border: 1px solid var(--border-cyan);
  cursor: pointer;
  font-size: 0.8rem;
  font-family: var(--font-display);
  text-transform: uppercase;
  letter-spacing: 0.16em;
  background: #050814;
  color: var(--accent-cyan);
  box-shadow: 0 0 0 1px rgba(0, 234, 255, 0.2);
  position: relative;
  overflow: hidden;
  transform: skewX(-12deg);
  transition:
    background var(--transition-fast),
    color var(--transition-fast),
    box-shadow var(--transition-fast),
    transform 0.08s ease-out;
}

button span,
.btn span {
  transform: skewX(12deg);
}

button::before,
.btn::before {
  content: "";
  position: absolute;
  inset: 0;
  border-top: 2px solid var(--accent-pink);
  border-bottom: 2px solid var(--accent-cyan);
  opacity: 0.65;
  pointer-events: none;
}

button:hover:not(:disabled),
.btn:hover:not(:disabled) {
  background: linear-gradient(135deg, rgba(255,77,216,0.45), rgba(0,234,255,0.25));
  color: var(--text-main);
  box-shadow: var(--shadow-neon-pink);
  transform: skewX(-12deg) translateY(-1px);
}

button:active:not(:disabled),
.btn:active:not(:disabled) {
  transform: skewX(-12deg) translateY(1px) scale(0.98);
  box-shadow: 0 0 0 1px rgba(0, 234, 255, 0.5);
}

button:disabled,
.btn:disabled {
  border-color: rgba(148, 163, 184, 0.4);
  background: rgba(15, 23, 42, 0.85);
  color: #6b7280;
  cursor: not-allowed;
  box-shadow: none;
}

/* ==== IMAGE BOX / CANVAS HUD FRAMES ==== */
.image-box {
  border-radius: var(--radius-inner);
  padding: 8px;
  margin-top: 8px;
  background:
    linear-gradient(135deg, rgba(255,77,216,0.18), rgba(0,234,255,0.12)),
    radial-gradient(circle at top right, rgba(123, 123, 255, 0.22), transparent 60%);
  position: relative;
  border: 1px solid rgba(0, 234, 255, 0.4);
  box-shadow: 0 0 0 1px rgba(5, 10, 30, 0.8);
  overflow: hidden;
}

.image-box::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  border: 1px dashed rgba(0, 234, 255, 0.2);
  pointer-events: none;
}

.image-box h3 {
  margin: 0 0 8px;
  font-size: 0.8rem;
  font-family: var(--font-display);
  text-transform: uppercase;
  letter-spacing: 0.16em;
  color: var(--accent-cyan);
}

.frame-size-label {
  margin-top: 6px;
  font-size: 0.7rem;
  color: var(--text-muted);
  text-align: center;
  font-family: var(--font-display);
  letter-spacing: 0.12em;
}

/* ==== CANVAS — GENERAL ==== */
canvas {
  max-width: 100%;
  border-radius: 6px;
  background: radial-gradient(circle at top, #020308, #020009 60%, #010005 100%);
  border: 1px solid rgba(0, 234, 255, 0.25);
  box-shadow: 0 0 0 1px rgba(5, 10, 30, 0.9);
}

/* ==== FRAME, PREVIEW & ORIGINAL CANVASES — RESPONSIVE ==== */
#frameCanvas,
#previewCanvas,
#originalCanvas {
  width: 100%;
  height: auto;
  display: block;
}

#frameCanvas {
  cursor: grab;
}

#frameCanvas:active {
  cursor: grabbing;
}

/* ==== LAYERS GRID ==== */
.layers-section {
  margin-top: 26px;
}

.layers-section h2 {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.9rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent-pink);
  display: flex;
  align-items: center;
  gap: 10px;
}

.layers-section h2::before {
  content: "";
  width: 32px;
  height: 2px;
  background: linear-gradient(to right, var(--border-cyan), transparent);
}

.layers-container {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
  margin-top: 8px;
}

.layer-card {
  background: radial-gradient(circle at top, rgba(0,234,255,0.2), transparent 55%) var(--bg-panel-elevated);
  border-radius: var(--radius-panel);
  padding: 10px;
  box-shadow:
    0 0 0 1px rgba(0, 234, 255, 0.25),
    0 14px 30px rgba(0, 0, 0, 0.85);
  border: 1px solid rgba(255, 77, 216, 0.35);
  position: relative;
  display: flex;
  flex-direction: column;
}

.layer-card h3 {
  margin: 0 0 6px;
  font-size: 0.8rem;
  font-family: var(--font-display);
  text-transform: uppercase;
  letter-spacing: 0.16em;
  color: var(--accent-pink);
}

.layer-card canvas {
  flex: 1 1 auto;
  background: #ffffff;
}

.layer-footer {
  margin-top: 6px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.75rem;
  color: var(--text-muted);
}

.layer-footer input[type="color"] {
  border: none;
  padding: 0;
  background: transparent;
  width: 32px;
  height: 24px;
}

/* ==== EXPORT SECTION ==== */
.export-section {
  margin-top: 26px;
  background: radial-gradient(circle at top, rgba(255,77,216,0.16), transparent 55%) var(--bg-panel);
  border-radius: var(--radius-panel);
  padding: 14px 14px 16px;
  box-shadow:
    0 0 0 1px rgba(0, 234, 255, 0.25),
    0 16px 34px rgba(0, 0, 0, 0.9);
  border: 1px solid rgba(0, 234, 255, 0.5);
  position: relative;
}

.export-section h2 {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.9rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent-cyan);
  display: flex;
  align-items: center;
  gap: 10px;
}

.export-section h2::before {
  content: "";
  width: 32px;
  height: 2px;
  background: linear-gradient(to right, var(--border-pink), transparent);
}

.export-hint {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-bottom: 10px;
}

.export-checkboxes {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-bottom: 14px;
}

.export-checkboxes label {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.8rem;
  cursor: pointer;
  padding: 4px 8px;
  border-radius: 999px;
  transition: background var(--transition-fast), box-shadow var(--transition-fast);
}

.export-checkboxes input[type="checkbox"] {
  cursor: pointer;
}

.export-checkboxes label:hover {
  background: rgba(0, 234, 255, 0.08);
  box-shadow: 0 0 10px rgba(0, 234, 255, 0.25);
}

/* ==== RESPONSIVE ==== */
@media (max-width: 768px) {
  .app {
    padding: 16px 8px 32px;
  }
  .panel {
    flex: 1 1 100%;
  }
  .layers-container {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 600px) {
  .size-fields {
    flex-wrap: wrap;
  }
  .size-actions {
    flex-wrap: wrap;
  }
}