/* ═══════════════════════════════════════════════════════════
   PixelKit – styles.css
   Palette: Volcanic Glass  #1A1A1A · #333 · #FF6B2B · #FFB088
   Font: Plus Jakarta Sans
═══════════════════════════════════════════════════════════ */

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg:        #111111;
  --surface:   #1C1C1C;
  --surface2:  #252525;
  --border:    #2E2E2E;
  --border2:   #3A3A3A;
  --text:      #F0EDE8;
  --text-muted:#8A8580;
  --accent:    #FF6B2B;
  --accent2:   #FFB088;
  --accent-dim:#FF6B2B22;
  --radius:    10px;
  --radius-sm: 6px;
  --shadow:    0 4px 24px rgba(0,0,0,.45);
  --font:      'Plus Jakarta Sans', sans-serif;
  --transition: 0.18s ease;
}

html { scroll-behavior: smooth; }

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  font-size: 14px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* ── SCROLLBAR ─────────────────────────────────────────── */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: var(--surface); }
::-webkit-scrollbar-thumb { background: var(--border2); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--accent); }

/* ── HEADER ────────────────────────────────────────────── */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(17,17,17,.92);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border);
}
.header-inner {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
  height: 60px;
  display: flex;
  align-items: center;
  gap: 24px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}
.logo-text {
  font-size: 18px;
  font-weight: 800;
  letter-spacing: -0.5px;
  background: linear-gradient(135deg, #FF6B2B, #FFB088);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.nav-tabs {
  display: flex;
  gap: 4px;
  flex: 1;
  justify-content: center;
}
.nav-tab {
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 7px 18px;
  border: 1px solid transparent;
  border-radius: 8px;
  background: transparent;
  color: var(--text-muted);
  font-family: var(--font);
  font-size: 13.5px;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition);
  white-space: nowrap;
}
.nav-tab:hover {
  color: var(--text);
  background: var(--surface2);
  border-color: var(--border2);
}
.nav-tab.active {
  color: var(--accent);
  background: var(--accent-dim);
  border-color: var(--accent);
}

.header-badge {
  flex-shrink: 0;
  font-size: 11.5px;
  font-weight: 600;
  color: var(--text-muted);
  background: var(--surface2);
  border: 1px solid var(--border);
  padding: 4px 12px;
  border-radius: 20px;
  letter-spacing: 0.3px;
}

/* ── HERO STRIP ────────────────────────────────────────── */
.hero-strip {
  background: linear-gradient(135deg, #1A1A1A 0%, #1f1a17 100%);
  border-bottom: 1px solid var(--border);
  padding: 40px 24px 36px;
  position: relative;
  overflow: hidden;
}
.hero-content {
  max-width: 1280px;
  margin: 0 auto;
  position: relative;
  z-index: 1;
}
.hero-tag {
  display: inline-block;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--accent);
  background: var(--accent-dim);
  border: 1px solid #FF6B2B44;
  padding: 4px 12px;
  border-radius: 20px;
  margin-bottom: 14px;
}
.hero-title {
  font-size: clamp(28px, 4vw, 42px);
  font-weight: 800;
  letter-spacing: -1.5px;
  line-height: 1.1;
  margin-bottom: 10px;
}
.hero-title .accent { color: var(--accent); }
.hero-desc {
  font-size: 15px;
  color: var(--text-muted);
  max-width: 520px;
  font-weight: 400;
}

/* Decorative blocks */
.hero-deco {
  position: absolute;
  right: 60px;
  top: 50%;
  transform: translateY(-50%);
  display: flex;
  gap: 8px;
  opacity: 0.12;
  pointer-events: none;
}
.deco-block {
  border-radius: 6px;
  animation: float 4s ease-in-out infinite;
}
.b1 { width: 48px; height: 48px; background: #FF6B2B; animation-delay: 0s; }
.b2 { width: 32px; height: 80px; background: #FFB088; animation-delay: .6s; align-self: flex-end; }
.b3 { width: 56px; height: 36px; background: #FF6B2B; animation-delay: 1.2s; align-self: center; }

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-8px); }
}

/* ── MAIN ──────────────────────────────────────────────── */
.main { flex: 1; }

/* ── TOOL PANELS ───────────────────────────────────────── */
.tool-panel { display: none; }
.tool-panel.active { display: block; }

.tool-layout {
  max-width: 1280px;
  margin: 0 auto;
  padding: 28px 24px;
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 24px;
  align-items: start;
}

/* ── CONTROLS SIDEBAR ──────────────────────────────────── */
.tool-controls {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 20px;
  position: sticky;
  top: 80px;
}

.control-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.control-label {
  font-size: 12px;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.8px;
}

/* Layout grid */
.layout-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 6px;
}
.layout-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 5px;
  padding: 10px 6px 8px;
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-muted);
  cursor: pointer;
  transition: all var(--transition);
  font-family: var(--font);
}
.layout-btn svg { width: 32px; height: 32px; }
.layout-btn span { font-size: 10px; font-weight: 600; letter-spacing: 0.3px; }
.layout-btn:hover { border-color: var(--accent2); color: var(--accent2); background: #FF6B2B11; }
.layout-btn.active { border-color: var(--accent); color: var(--accent); background: var(--accent-dim); }

/* Sliders */
.slider-row {
  display: flex;
  align-items: center;
  gap: 10px;
}
.slider {
  flex: 1;
  -webkit-appearance: none;
  height: 4px;
  border-radius: 2px;
  background: var(--border2);
  outline: none;
  cursor: pointer;
}
.slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--accent);
  cursor: pointer;
  box-shadow: 0 0 0 3px var(--accent-dim);
  transition: box-shadow var(--transition);
}
.slider::-webkit-slider-thumb:hover { box-shadow: 0 0 0 5px var(--accent-dim); }
.slider-val {
  font-size: 12px;
  font-weight: 600;
  color: var(--accent);
  min-width: 36px;
  text-align: right;
}

/* Color picker */
.color-row { display: flex; align-items: center; gap: 10px; }
.color-picker {
  width: 36px;
  height: 36px;
  border: 2px solid var(--border2);
  border-radius: var(--radius-sm);
  background: none;
  cursor: pointer;
  padding: 2px;
}
.color-presets { display: flex; gap: 6px; }
.color-preset {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  border: 2px solid transparent;
  cursor: pointer;
  transition: all var(--transition);
}
.color-preset:hover, .color-preset.active { border-color: var(--accent); transform: scale(1.15); }

/* Select */
.select-input {
  width: 100%;
  padding: 9px 12px;
  background: var(--surface2);
  border: 1px solid var(--border2);
  border-radius: var(--radius-sm);
  color: var(--text);
  font-family: var(--font);
  font-size: 13px;
  cursor: pointer;
  outline: none;
  transition: border-color var(--transition);
}
.select-input:focus { border-color: var(--accent); }

/* Text input */
.text-input {
  width: 100%;
  padding: 9px 12px;
  background: var(--surface2);
  border: 1px solid var(--border2);
  border-radius: var(--radius-sm);
  color: var(--text);
  font-family: var(--font);
  font-size: 13px;
  outline: none;
  transition: border-color var(--transition);
}
.text-input:focus { border-color: var(--accent); }
.text-input::placeholder { color: var(--text-muted); }

/* Toggle group */
.toggle-group {
  display: flex;
  gap: 4px;
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 3px;
}
.toggle-group.vertical { flex-direction: column; }
.toggle-btn {
  flex: 1;
  padding: 7px 10px;
  border: none;
  border-radius: 5px;
  background: transparent;
  color: var(--text-muted);
  font-family: var(--font);
  font-size: 12.5px;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition);
  text-align: center;
}
.toggle-btn:hover { color: var(--text); background: var(--border); }
.toggle-btn.active { background: var(--accent); color: #fff; font-weight: 600; }

/* Buttons */
.btn-primary {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  width: 100%;
  padding: 12px 20px;
  background: linear-gradient(135deg, #FF6B2B, #e85a1e);
  border: none;
  border-radius: var(--radius-sm);
  color: #fff;
  font-family: var(--font);
  font-size: 14px;
  font-weight: 700;
  cursor: pointer;
  transition: all var(--transition);
  letter-spacing: 0.2px;
  box-shadow: 0 4px 16px #FF6B2B44;
}
.btn-primary:hover:not(:disabled) {
  transform: translateY(-1px);
  box-shadow: 0 6px 24px #FF6B2B66;
}
.btn-primary:active:not(:disabled) { transform: translateY(0); }
.btn-primary:disabled {
  opacity: 0.35;
  cursor: not-allowed;
  box-shadow: none;
}

.btn-secondary {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  width: 100%;
  padding: 11px 20px;
  background: var(--surface2);
  border: 1px solid var(--border2);
  border-radius: var(--radius-sm);
  color: var(--text);
  font-family: var(--font);
  font-size: 13.5px;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition);
}
.btn-secondary:hover:not(:disabled) { border-color: var(--accent); color: var(--accent); }
.btn-secondary:disabled { opacity: 0.35; cursor: not-allowed; }

/* Checkbox */
.lock-row { flex-direction: row; align-items: center; gap: 8px; }
.checkbox {
  width: 16px;
  height: 16px;
  accent-color: var(--accent);
  cursor: pointer;
}

/* ── WORKSPACE ─────────────────────────────────────────── */
.tool-workspace {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

/* Upload zone */
.upload-zone {
  border: 2px dashed var(--border2);
  border-radius: var(--radius);
  padding: 52px 24px;
  text-align: center;
  cursor: pointer;
  transition: all var(--transition);
  background: var(--surface);
}
.upload-zone:hover, .upload-zone.drag-over {
  border-color: var(--accent);
  background: var(--accent-dim);
}
.upload-icon { margin-bottom: 16px; display: flex; justify-content: center; }
.upload-title {
  font-size: 17px;
  font-weight: 700;
  margin-bottom: 6px;
  color: var(--text);
}
.upload-sub { font-size: 13px; color: var(--text-muted); }
.upload-link {
  background: none;
  border: none;
  color: var(--accent);
  font-family: var(--font);
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  text-decoration: underline;
  text-underline-offset: 2px;
}
.upload-link:hover { color: var(--accent2); }

/* Thumbnails strip */
.image-thumbs {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  padding: 16px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}
.thumb-item {
  position: relative;
  width: 80px;
  height: 80px;
  border-radius: 6px;
  overflow: hidden;
  border: 2px solid var(--border2);
  cursor: grab;
  transition: border-color var(--transition);
  flex-shrink: 0;
}
.thumb-item:hover { border-color: var(--accent); }
.thumb-item img { width: 100%; height: 100%; object-fit: cover; display: block; }
.thumb-remove {
  position: absolute;
  top: 3px;
  right: 3px;
  width: 20px;
  height: 20px;
  background: rgba(0,0,0,.75);
  border: none;
  border-radius: 50%;
  color: #fff;
  font-size: 12px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity var(--transition);
  line-height: 1;
}
.thumb-item:hover .thumb-remove { opacity: 1; }
.thumb-add {
  width: 80px;
  height: 80px;
  border-radius: 6px;
  border: 2px dashed var(--border2);
  background: var(--surface2);
  color: var(--text-muted);
  font-size: 24px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition);
  flex-shrink: 0;
}
.thumb-add:hover { border-color: var(--accent); color: var(--accent); }

/* Preview canvas */
.preview-wrap {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
}
.preview-label {
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--text-muted);
  margin-bottom: 12px;
}
.preview-hint { font-weight: 400; text-transform: none; letter-spacing: 0; }
#collage-canvas {
  display: block;
  max-width: 100%;
  border-radius: 6px;
  margin: 0 auto;
}

/* ── PDF PAGES ─────────────────────────────────────────── */
.pdf-pages-wrap {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
}
.pdf-pages {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 12px;
}
.pdf-page-item {
  position: relative;
  width: 110px;
  background: var(--surface2);
  border: 1px solid var(--border2);
  border-radius: 6px;
  overflow: hidden;
  cursor: grab;
  transition: all var(--transition);
}
.pdf-page-item:hover { border-color: var(--accent); transform: translateY(-2px); }
.pdf-page-item img { width: 100%; height: 80px; object-fit: cover; display: block; }
.pdf-page-num {
  font-size: 11px;
  font-weight: 600;
  color: var(--text-muted);
  text-align: center;
  padding: 5px 4px;
}
.pdf-page-remove {
  position: absolute;
  top: 4px;
  right: 4px;
  width: 20px;
  height: 20px;
  background: rgba(0,0,0,.75);
  border: none;
  border-radius: 50%;
  color: #fff;
  font-size: 12px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity var(--transition);
}
.pdf-page-item:hover .pdf-page-remove { opacity: 1; }

.pdf-page-count {
  background: var(--accent-dim);
  border: 1px solid #FF6B2B44;
  border-radius: var(--radius-sm);
  padding: 8px 12px;
  font-size: 13px;
  font-weight: 600;
  color: var(--accent);
  text-align: center;
}

/* ── RESIZE PREVIEWS ───────────────────────────────────── */
.resize-previews {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}
.resize-preview-item {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  flex: 1;
  min-width: 200px;
  max-width: 400px;
}
.resize-preview-item img {
  width: 100%;
  height: 200px;
  object-fit: contain;
  background: #0a0a0a;
  display: block;
}
.resize-preview-meta {
  padding: 10px 14px;
  font-size: 12px;
  color: var(--text-muted);
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.resize-preview-name {
  font-weight: 600;
  color: var(--text);
  font-size: 12px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 140px;
}

/* Resize mode panels */
.resize-mode-panel { display: none; }
.resize-mode-panel.active { display: flex; flex-direction: column; gap: 14px; }

/* Preset grid */
.preset-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 6px;
}
.preset-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 9px 6px;
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  font-family: var(--font);
  font-size: 11px;
  font-weight: 700;
  cursor: pointer;
  transition: all var(--transition);
  line-height: 1.3;
}
.preset-btn span {
  font-size: 10px;
  font-weight: 400;
  color: var(--text-muted);
  margin-top: 2px;
}
.preset-btn:hover { border-color: var(--accent); color: var(--accent); background: var(--accent-dim); }
.preset-btn.active { border-color: var(--accent); background: var(--accent-dim); color: var(--accent); }

/* Resize info box */
.resize-info {
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 10px 14px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.info-row {
  display: flex;
  justify-content: space-between;
  font-size: 12.5px;
}
.info-row span:first-child { color: var(--text-muted); }
.info-row span:last-child { font-weight: 600; color: var(--accent2); }

/* ── FOOTER ────────────────────────────────────────────── */
.footer {
  border-top: 1px solid var(--border);
  padding: 20px 24px;
  text-align: center;
  font-size: 12px;
  color: var(--text-muted);
}

/* ── DRAG STATES ───────────────────────────────────────── */
.dragging { opacity: 0.4; }
.drag-over-item { border-color: var(--accent) !important; }

/* ── TOAST ─────────────────────────────────────────────── */
.toast {
  position: fixed;
  bottom: 28px;
  left: 50%;
  transform: translateX(-50%) translateY(80px);
  background: var(--surface);
  border: 1px solid var(--border2);
  border-radius: 8px;
  padding: 12px 22px;
  font-size: 13.5px;
  font-weight: 600;
  color: var(--text);
  box-shadow: var(--shadow);
  z-index: 9999;
  transition: transform 0.3s cubic-bezier(.34,1.56,.64,1);
  pointer-events: none;
}
.toast.show { transform: translateX(-50%) translateY(0); }
.toast.success { border-color: #4ade80; color: #4ade80; }
.toast.error { border-color: #f87171; color: #f87171; }

/* ── RESPONSIVE ────────────────────────────────────────── */
@media (max-width: 900px) {
  .tool-layout {
    grid-template-columns: 1fr;
  }
  .tool-controls {
    position: static;
  }
  .hero-deco { display: none; }
  .header-badge { display: none; }
}
@media (max-width: 600px) {
  .nav-tab { padding: 7px 12px; font-size: 12px; }
  .hero-strip { padding: 28px 16px; }
  .tool-layout { padding: 16px; }
  .layout-grid { grid-template-columns: repeat(3, 1fr); }
}