*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; -webkit-tap-highlight-color: transparent; }

:root {
  --bg: #141418;
  --surface: rgba(28,28,36,0.97);
  --surface2: rgba(36,36,46,0.98);
  --border: rgba(255,255,255,0.07);
  --text: #ede9e0;
  --muted: rgba(237,233,224,0.38);
  --accent: #e8b86d;
  --accent-soft: rgba(232,184,109,0.14);
  --danger: #e87070;
  --safe-bottom: env(safe-area-inset-bottom, 0px);
  --safe-top: env(safe-area-inset-top, 0px);
  --toolbar-h: 72px;
  --topbar-h: 52px;
}

html, body {
  height: 100%;
  width: 100%;
  overflow: hidden;
  background: var(--bg);
  color: var(--text);
  font-family: 'Syne', sans-serif;
  touch-action: none;
}

/* ── TOP BAR ── */
.topbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: calc(var(--topbar-h) + var(--safe-top));
  padding-top: var(--safe-top);
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  padding-left: 16px;
  padding-right: 16px;
  gap: 10px;
  z-index: 50;
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
}

.logo {
  font-family: 'Syne', sans-serif;
  font-weight: 700;
  font-size: 17px;
  color: var(--accent);
  letter-spacing: -0.01em;
  flex: 1;
}

.save-indicator {
  display: flex;
  align-items: center;
  gap: 5px;
  font-family: 'Syne Mono', monospace;
  font-size: 9px;
  color: var(--muted);
  letter-spacing: 0.06em;
  text-transform: uppercase;
}
.save-dot {
  width: 5px; height: 5px;
  border-radius: 50%;
  background: #6bcb77;
  opacity: 0;
  transition: opacity 0.3s;
  flex-shrink: 0;
}
.save-dot.on { opacity: 1; animation: blink 1.5s ease-in-out; }
@keyframes blink {
  0%,100%{opacity:1} 50%{opacity:0.3}
}

.top-icon-btn {
  width: 38px; height: 38px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: rgba(255,255,255,0.04);
  color: var(--text);
  display: flex; align-items: center; justify-content: center;
  cursor: pointer;
  transition: background 0.15s;
  flex-shrink: 0;
}
.top-icon-btn:active { background: rgba(255,255,255,0.12); }

/* ── CANVAS ── */
#viewport {
  position: fixed;
  top: 0; left: 0;
  width: 100%; height: 100%;
  z-index: 0;
  transform-origin: 0 0;
  will-change: transform;
}
#bgCanvas, #canvasEl {
  position: absolute;
  top: 0; left: 0;
  display: block;
  touch-action: none;
}
#bgCanvas { z-index: 0; }
#canvasEl  { z-index: 1; background: transparent; }

/* ── ZOOM HUD ── */
#zoomHud {
  position: fixed;
  bottom: calc(var(--toolbar-h) + var(--safe-bottom) + 12px);
  left: 50%;
  transform: translateX(-50%);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 100px;
  display: flex;
  align-items: center;
  z-index: 45;
  overflow: hidden;
  opacity: 0;
  transition: opacity 0.3s;
  pointer-events: none;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: 0 4px 16px rgba(0,0,0,0.4);
}
#zoomHud.visible { opacity: 1; pointer-events: all; }
.zoom-hud-btn {
  width: 40px; height: 36px;
  border: none;
  background: transparent;
  color: var(--text);
  font-size: 20px;
  display: flex; align-items: center; justify-content: center;
  cursor: pointer;
  transition: background 0.15s;
  font-family: 'Syne Mono', monospace;
}
.zoom-hud-btn:active { background: rgba(255,255,255,0.1); }
#zoomLabel {
  font-family: 'Syne Mono', monospace;
  font-size: 11px;
  color: var(--accent);
  letter-spacing: 0.06em;
  padding: 0 4px;
  min-width: 46px;
  text-align: center;
}
.zoom-sep {
  width: 1px; height: 20px;
  background: var(--border);
  flex-shrink: 0;
}

/* ── BOTTOM TOOLBAR ── */
.toolbar {
  position: fixed;
  bottom: 0; left: 0; right: 0;
  height: calc(var(--toolbar-h) + var(--safe-bottom));
  padding-bottom: var(--safe-bottom);
  background: var(--surface);
  border-top: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-around;
  padding-left: 8px;
  padding-right: 8px;
  z-index: 50;
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
}

.tb-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
  width: 52px;
  height: 52px;
  border-radius: 14px;
  border: 1.5px solid transparent;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  transition: all 0.15s;
  position: relative;
  flex-shrink: 0;
}
.tb-btn span {
  font-size: 9px;
  letter-spacing: 0.04em;
  font-weight: 500;
  text-transform: uppercase;
}
.tb-btn.active {
  background: var(--accent-soft);
  border-color: var(--accent);
  color: var(--accent);
}
.tb-btn:active { transform: scale(0.92); }

/* Color preview in toolbar */
.tb-color-preview {
  width: 24px; height: 24px;
  border-radius: 50%;
  border: 2px solid rgba(255,255,255,0.25);
  flex-shrink: 0;
}

/* Brush size preview */
.tb-brush-preview {
  width: 28px; height: 28px;
  display: flex; align-items: center; justify-content: center;
}
.tb-brush-dot {
  border-radius: 50%;
  background: var(--muted);
  transition: all 0.15s;
}
.tb-btn.active .tb-brush-dot { background: var(--accent); }

/* ── SLIDE PANELS ── */
.panel-overlay {
  position: fixed; inset: 0;
  background: rgba(0,0,0,0);
  z-index: 80;
  pointer-events: none;
  transition: background 0.3s;
}
.panel-overlay.open {
  background: rgba(0,0,0,0.5);
  pointer-events: all;
}

.slide-panel {
  position: fixed;
  left: 0; right: 0;
  bottom: 0;
  background: var(--surface2);
  border-radius: 20px 20px 0 0;
  border: 1px solid var(--border);
  border-bottom: none;
  z-index: 90;
  transform: translateY(100%);
  transition: transform 0.35s cubic-bezier(0.32,0.72,0,1);
  max-height: 82vh;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}
.slide-panel.open { transform: translateY(0); }

.panel-handle {
  width: 36px; height: 4px;
  background: rgba(255,255,255,0.15);
  border-radius: 2px;
  margin: 12px auto 0;
  flex-shrink: 0;
}

.panel-title {
  font-size: 15px;
  font-weight: 600;
  letter-spacing: -0.01em;
  padding: 12px 20px 16px;
  flex-shrink: 0;
  color: var(--text);
}

.panel-scroll {
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  padding: 0 16px calc(16px + var(--safe-bottom));
  flex: 1;
}
.panel-scroll::-webkit-scrollbar { display: none; }

/* Section inside panel */
.panel-section { margin-bottom: 24px; }
.section-label {
  font-family: 'Syne Mono', monospace;
  font-size: 9px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 12px;
}

/* ── TOOLS PANEL ── */
.tools-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
}
.tool-card {
  height: 70px;
  border-radius: 14px;
  border: 1.5px solid var(--border);
  background: rgba(255,255,255,0.03);
  display: flex; flex-direction: column;
  align-items: center; justify-content: center;
  gap: 6px;
  cursor: pointer;
  transition: all 0.15s;
  color: var(--muted);
}
.tool-card span {
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}
.tool-card.active {
  background: var(--accent-soft);
  border-color: var(--accent);
  color: var(--accent);
}
.tool-card:active { transform: scale(0.95); }

/* ── BRUSH PANEL ── */
.brush-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  padding: 4px 0;
}
.brush-option {
  flex: 1;
  height: 60px;
  border-radius: 14px;
  border: 1.5px solid var(--border);
  background: rgba(255,255,255,0.03);
  display: flex; align-items: center; justify-content: center;
  cursor: pointer;
  transition: all 0.15s;
}
.brush-option.active {
  background: var(--accent-soft);
  border-color: var(--accent);
}
.brush-option:active { transform: scale(0.95); }
.brush-pip {
  border-radius: 50%;
  background: var(--muted);
  transition: background 0.15s;
}
.brush-option.active .brush-pip { background: var(--accent); }

.slider-row {
  display: flex; align-items: center; gap: 14px;
  padding: 6px 0;
}
.slider-label {
  font-family: 'Syne Mono', monospace;
  font-size: 10px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--muted);
  width: 56px;
  flex-shrink: 0;
}
.slider-val {
  font-family: 'Syne Mono', monospace;
  font-size: 11px;
  color: var(--accent);
  width: 36px;
  text-align: right;
  flex-shrink: 0;
}
input[type=range] {
  flex: 1;
  -webkit-appearance: none;
  height: 4px;
  border-radius: 2px;
  background: rgba(255,255,255,0.1);
  outline: none;
  cursor: pointer;
}
input[type=range]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 22px; height: 22px;
  border-radius: 50%;
  background: var(--accent);
  border: 3px solid var(--bg);
  box-shadow: 0 0 0 1.5px var(--accent);
  cursor: pointer;
}

/* ── COLORS PANEL ── */
.color-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 10px;
}
.color-swatch {
  aspect-ratio: 1;
  border-radius: 12px;
  cursor: pointer;
  border: 2.5px solid transparent;
  transition: transform 0.15s, border-color 0.15s, box-shadow 0.15s;
  position: relative;
}
.color-swatch:active { transform: scale(0.9); }
.color-swatch.active {
  border-color: #fff;
  box-shadow: 0 0 0 1px rgba(255,255,255,0.3), 0 6px 16px rgba(0,0,0,0.5);
  transform: scale(1.06);
}
.color-name {
  position: absolute;
  bottom: calc(100% + 6px);
  left: 50%; transform: translateX(-50%);
  background: rgba(0,0,0,0.85);
  color: #fff;
  font-size: 9px;
  letter-spacing: 0.05em;
  white-space: nowrap;
  padding: 3px 8px;
  border-radius: 6px;
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.2s;
  font-family: 'Syne Mono', monospace;
  text-transform: uppercase;
}
.color-swatch.show-name .color-name { opacity: 1; }

/* ── BACKGROUNDS ── */
.bg-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px;
}
.bg-option {
  height: 72px;
  border-radius: 14px;
  border: 2px solid transparent;
  cursor: pointer;
  display: flex; align-items: flex-end;
  padding: 8px 10px;
  font-family: 'Syne Mono', monospace;
  font-size: 9px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  transition: all 0.18s;
  position: relative;
  overflow: hidden;
}
.bg-option:active { transform: scale(0.97); }
.bg-option.active { border-color: var(--accent); }
.bg-option.active::after {
  content: '';
  position: absolute;
  top: 8px; right: 8px;
  width: 14px; height: 14px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 2px rgba(0,0,0,0.5);
}

/* ── PROJECTS PANEL ── */
.project-card {
  display: flex; align-items: center; gap: 12px;
  padding: 12px;
  border-radius: 14px;
  border: 1px solid var(--border);
  background: rgba(255,255,255,0.02);
  cursor: pointer;
  margin-bottom: 8px;
  transition: background 0.15s;
}
.project-card:active { background: rgba(255,255,255,0.07); }
.project-card.current { border-color: var(--accent); background: var(--accent-soft); }
.project-thumb {
  width: 56px; height: 44px;
  border-radius: 8px;
  background: rgba(255,255,255,0.05);
  flex-shrink: 0;
  overflow: hidden;
}
.project-thumb img { width: 100%; height: 100%; object-fit: cover; }
.project-info { flex: 1; min-width: 0; }
.project-name { font-size: 13px; font-weight: 600; letter-spacing: -0.01em; }
.project-time {
  font-family: 'Syne Mono', monospace;
  font-size: 9px;
  color: var(--muted);
  margin-top: 2px;
  letter-spacing: 0.05em;
}
.project-del {
  width: 32px; height: 32px;
  border-radius: 8px;
  border: none;
  background: transparent;
  color: var(--muted);
  display: flex; align-items: center; justify-content: center;
  cursor: pointer;
  transition: all 0.15s;
  flex-shrink: 0;
}
.project-del:active { background: rgba(232,112,112,0.15); color: var(--danger); }

.new-proj-btn {
  width: 100%;
  height: 52px;
  border-radius: 14px;
  border: 1.5px dashed rgba(232,184,109,0.3);
  background: transparent;
  color: var(--accent);
  font-family: 'Syne', sans-serif;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.02em;
  cursor: pointer;
  display: flex; align-items: center; justify-content: center; gap: 8px;
  margin-bottom: 12px;
  transition: all 0.15s;
}
.new-proj-btn:active { background: var(--accent-soft); border-style: solid; }

.empty-state {
  text-align: center;
  padding: 24px 0;
  font-family: 'Syne Mono', monospace;
  font-size: 10px;
  color: var(--muted);
  letter-spacing: 0.06em;
  line-height: 1.8;
}

/* ── EXPORT/SHARE PANEL ── */
.action-btn {
  width: 100%;
  height: 56px;
  border-radius: 14px;
  border: 1.5px solid var(--border);
  background: rgba(255,255,255,0.03);
  color: var(--text);
  font-family: 'Syne', sans-serif;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: -0.01em;
  cursor: pointer;
  display: flex; align-items: center; gap: 14px;
  padding: 0 18px;
  margin-bottom: 10px;
  transition: all 0.15s;
}
.action-btn:active { background: rgba(255,255,255,0.08); transform: scale(0.98); }
.action-btn.accent {
  background: var(--accent-soft);
  border-color: var(--accent);
  color: var(--accent);
}
.action-btn .ab-icon {
  width: 36px; height: 36px;
  border-radius: 10px;
  background: rgba(255,255,255,0.07);
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
}
.action-btn.accent .ab-icon { background: rgba(232,184,109,0.2); }

/* ── FLOATING UNDO/REDO ── */
.float-actions {
  position: fixed;
  top: calc(var(--topbar-h) + var(--safe-top) + 12px);
  right: 14px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  z-index: 40;
}
.float-btn {
  width: 40px; height: 40px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  display: flex; align-items: center; justify-content: center;
  cursor: pointer;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  transition: all 0.15s;
  box-shadow: 0 4px 12px rgba(0,0,0,0.3);
}
.float-btn:active { transform: scale(0.88); background: rgba(255,255,255,0.12); }

/* ── TOAST ── */
.toast {
  position: fixed;
  top: calc(var(--topbar-h) + var(--safe-top) + 14px);
  left: 50%;
  transform: translateX(-50%) translateY(-8px);
  background: rgba(20,20,24,0.95);
  border: 1px solid rgba(255,255,255,0.1);
  color: var(--text);
  font-family: 'Syne Mono', monospace;
  font-size: 11px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 10px 20px;
  border-radius: 100px;
  z-index: 200;
  opacity: 0;
  transition: all 0.3s cubic-bezier(0.34,1.56,0.64,1);
  pointer-events: none;
  white-space: nowrap;
  backdrop-filter: blur(12px);
  box-shadow: 0 8px 24px rgba(0,0,0,0.4);
}
.toast.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}