/* ============================================================
   WATERMARK GUARD — style.css  (Phase 2)
   Aesthetic: Warm Dark Studio — charcoal base, amber accents
   ============================================================ */

/* ── Variables ── */
:root {
  --bg:          #f5f4f0;
  --bg2:         #efefeb;
  --bg3:         #e8e7e2;
  --card:        #faf9f6;
  --border:      #d8d6cf;
  --border2:     #c8c6be;
  --text:        #2a2820;
  --text-muted:  #6b6860;
  --text-dim:    #9b9890;
  --accent:      #c07010;
  --accent2:     #a05c08;
  --accent-dim:  rgba(192,112,16,0.10);
  --accent-glow: rgba(192,112,16,0.22);
  --green:       #2a8a5a;
  --red:         #c04040;
  --radius:      10px;
  --radius-lg:   16px;
  --shadow:      0 4px 20px rgba(0,0,0,0.10);
  --font-head:   'Syne', sans-serif;
  --font-mono:   'DM Mono', monospace;
  --font-jp:     'Noto Sans JP', sans-serif;
  --transition:  0.18s ease;
}

/* ── Reset ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 14px; scroll-behavior: smooth; }
body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-mono);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
}

/* ── Header ── */
.app-header {
  background: var(--bg2);
  border-bottom: 1px solid var(--border);
  padding: 0 24px;
  height: 56px;
  flex-shrink: 0;
  position: sticky;
  top: 0;
  z-index: 100;
}
.header-inner {
  max-width: 1400px;
  margin: 0 auto;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
}
.logo-mark {
  font-size: 20px;
  color: var(--accent);
  line-height: 1;
}
.logo-text {
  font-family: var(--font-head);
  font-size: 17px;
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--text);
}
.logo-text strong {
  color: var(--accent);
  font-weight: 800;
}
.header-right {
  display: flex;
  align-items: center;
  gap: 12px;
}
.header-badge {
  font-size: 11px;
  color: var(--green);
  background: rgba(94,196,138,0.1);
  border: 1px solid rgba(94,196,138,0.25);
  padding: 4px 10px;
  border-radius: 20px;
  letter-spacing: 0.04em;
}

/* Language toggle */
.lang-toggle {
  display: flex;
  background: var(--bg3);
  border: 1px solid var(--border);
  border-radius: 20px;
  overflow: hidden;
}
.lang-btn {
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-family: var(--font-jp), var(--font-mono);
  font-size: 11px;
  padding: 4px 10px;
  cursor: pointer;
  transition: all var(--transition);
  border-radius: 20px;
  line-height: 1.4;
}
.lang-btn:hover { color: var(--text); }
.lang-btn.active {
  background: var(--accent-dim);
  color: var(--accent);
}
.lang-btn:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

/* ── Main Layout ── */
.app-main {
  flex: 1;
  display: grid;
  grid-template-columns: 1fr 340px;
  gap: 20px;
  max-width: 1400px;
  margin: 0 auto;
  width: 100%;
  padding: 20px 24px;
  align-items: start;
}

/* ── Preview Panel ── */
.preview-panel {
  display: flex;
  flex-direction: column;
  gap: 10px;
  min-height: 400px;
}

/* Empty State */
.empty-state {
  background: var(--card);
  border: 2px dashed var(--border2);
  border-radius: var(--radius-lg);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 64px 32px;
  gap: 12px;
  text-align: center;
  transition: border-color var(--transition);
  min-height: 400px;
}
.empty-state.drag-over {
  border-color: var(--accent);
  background: var(--accent-dim);
}
.empty-icon {
  font-size: 52px;
  opacity: 0.4;
  margin-bottom: 4px;
}
.empty-title {
  font-family: var(--font-head);
  font-size: 18px;
  font-weight: 700;
  color: var(--text);
}
.empty-sub {
  color: var(--text-muted);
  font-size: 12.5px;
  margin-top: -4px;
}
.empty-formats {
  font-size: 11px;
  color: var(--text-dim);
  letter-spacing: 0.08em;
  margin-top: 6px;
}

/* Canvas wrap */
.canvas-wrap {
  background: repeating-conic-gradient(#dddbd4 0% 25%, #e8e6df 0% 50%) 0 0 / 20px 20px;
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  min-height: 400px;
  position: relative;
  border: 1px solid var(--border);
}
.canvas-wrap canvas {
  display: block;
  max-width: 100%;
  max-height: 70vh;
  border-radius: 4px;
  object-fit: contain;
  cursor: default;
}
.canvas-wrap.stamp-mode canvas,
.canvas-wrap.wm-mode canvas {
  cursor: grab;
  /* Disable browser pan/zoom on these canvases so touch drags don't
     scroll the page while a drag gesture is active. */
  touch-action: none;
}
.canvas-wrap.stamp-mode canvas.dragging,
.canvas-wrap.wm-mode canvas.dragging {
  cursor: grabbing;
}

/* Image info bar */
.image-info {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 8px 14px;
  background: var(--card);
  border-radius: var(--radius);
  border: 1px solid var(--border);
  flex-wrap: wrap;
}
.info-name {
  font-size: 12px;
  color: var(--text-muted);
  flex: 1;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.info-dim {
  font-size: 12px;
  color: var(--accent);
  white-space: nowrap;
}

/* Privacy note */
.privacy-note {
  font-size: 11px;
  color: var(--text-dim);
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 0 4px;
}
.privacy-icon { font-size: 12px; }

/* ── Controls Panel ── */
.controls-panel {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

/* Cards */
.control-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 16px 18px;
}
.card-label {
  font-family: var(--font-head);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 12px;
  display: block;
}

/* Mode toggle */
.mode-card { padding: 12px 14px; }
.mode-toggle {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 6px;
}
.mode-btn {
  background: var(--bg3);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text-muted);
  font-family: var(--font-mono);
  font-size: 11.5px;
  padding: 8px 8px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 5px;
  transition: all var(--transition);
  text-align: center;
}
.mode-btn:hover { border-color: var(--border2); color: var(--text); }
.mode-btn.active {
  background: var(--accent-dim);
  border-color: var(--accent);
  color: var(--accent);
}
.mode-btn:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.mode-icon { font-size: 13px; opacity: 0.8; }

/* Text input */
.text-input {
  width: 100%;
  background: var(--bg3);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text);
  font-family: var(--font-jp), var(--font-mono);
  font-size: 13.5px;
  padding: 9px 12px;
  margin-bottom: 10px;
  transition: border-color var(--transition);
}
.text-input:hover { border-color: var(--border2); }
.text-input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

/* Select input */
.select-input {
  width: 100%;
  background: var(--bg3);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text);
  font-family: var(--font-jp), var(--font-mono);
  font-size: 12.5px;
  padding: 8px 10px;
  cursor: pointer;
  transition: border-color var(--transition);
  appearance: none;
  -webkit-appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%238a8794' stroke-width='1.5' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 10px center;
  padding-right: 28px;
}
.select-input:hover { border-color: var(--border2); }
.select-input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
}
.select-input option { background: var(--bg2); color: var(--text); }

/* Preset chips */
.preset-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 5px;
}
.chip {
  background: var(--bg3);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text-muted);
  font-family: var(--font-jp), var(--font-mono);
  font-size: 11px;
  padding: 4px 9px;
  cursor: pointer;
  transition: all var(--transition);
  line-height: 1.5;
}
.chip:hover { border-color: var(--accent); color: var(--accent); background: var(--accent-dim); }
.chip:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

/* Control rows */
.control-row {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-bottom: 14px;
}
.control-row:last-child { margin-bottom: 0; }
.control-row label {
  font-size: 11.5px;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.val {
  color: var(--accent);
  font-size: 11px;
  font-weight: 500;
}

/* Color row */
.color-row {
  display: flex;
  align-items: center;
  gap: 10px;
}
input[type="color"] {
  width: 36px;
  height: 30px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--bg3);
  cursor: pointer;
  padding: 2px;
  flex-shrink: 0;
}
input[type="color"]::-webkit-color-swatch-wrapper { padding: 0; border-radius: 4px; }
input[type="color"]::-webkit-color-swatch { border: none; border-radius: 3px; }
.color-swatches {
  display: flex;
  gap: 5px;
  flex-wrap: wrap;
}
.swatch {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  border: 2px solid transparent;
  cursor: pointer;
  transition: transform var(--transition), border-color var(--transition);
  flex-shrink: 0;
}
.swatch:hover { transform: scale(1.2); }
.swatch.active { border-color: var(--accent); }
.swatch:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

/* Range inputs */
input[type="range"] {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 4px;
  background: var(--bg3);
  border-radius: 2px;
  border: 1px solid var(--border);
  cursor: pointer;
  transition: background var(--transition);
}
input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--accent);
  border: 2px solid var(--bg);
  box-shadow: 0 0 6px var(--accent-glow);
  cursor: pointer;
  transition: transform var(--transition), box-shadow var(--transition);
}
input[type="range"]::-webkit-slider-thumb:hover {
  transform: scale(1.2);
  box-shadow: 0 0 10px var(--accent-glow);
}
input[type="range"]:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

/* Toggle switch */
.toggle-row {
  flex-direction: row;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0;
}
.toggle-row label:first-child {
  font-size: 11.5px;
  color: var(--text-muted);
}
.toggle-switch { position: relative; display: inline-block; }
.toggle-switch input { opacity: 0; width: 0; height: 0; position: absolute; }
.toggle-track {
  display: block;
  width: 38px;
  height: 20px;
  background: var(--bg3);
  border: 1px solid var(--border);
  border-radius: 20px;
  cursor: pointer;
  transition: background var(--transition), border-color var(--transition);
  position: relative;
}
.toggle-thumb {
  display: block;
  width: 14px;
  height: 14px;
  background: var(--text-dim);
  border-radius: 50%;
  position: absolute;
  top: 2px;
  left: 2px;
  transition: transform var(--transition), background var(--transition);
}
.toggle-switch input:checked + .toggle-track {
  background: var(--accent-dim);
  border-color: var(--accent);
}
.toggle-switch input:checked + .toggle-track .toggle-thumb {
  transform: translateX(18px);
  background: var(--accent);
}
.toggle-switch input:focus-visible + .toggle-track {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

/* Position grid */
.position-grid {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  grid-template-rows: 1fr 1fr 1fr;
  gap: 6px;
  width: 100%;
  aspect-ratio: 1.8;
  background: var(--bg3);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 8px;
  margin-bottom: 10px;
}
.pos-btn {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text-muted);
  font-size: 16px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition);
}
.pos-btn:hover { border-color: var(--accent); color: var(--accent); background: var(--accent-dim); }
.pos-btn.active { border-color: var(--accent); color: var(--accent); background: var(--accent-dim); }
.pos-btn:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.hint-text {
  font-size: 11px;
  color: var(--text-dim);
  text-align: center;
}

/* Watermark image empty state */
.wm-empty {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  padding: 24px 16px;
  background: var(--bg3);
  border: 1px dashed var(--border2);
  border-radius: var(--radius);
  text-align: center;
}
.wm-empty.drag-over {
  border-color: var(--accent);
  background: var(--accent-dim);
}
.wm-empty-icon { font-size: 28px; opacity: 0.35; }
.wm-empty-text { font-size: 12px; color: var(--text-dim); }
.wm-empty-sub  { font-size: 11px; color: var(--text-dim); line-height: 1.5; max-width: 200px; }
.wm-empty-note { font-size: 10.5px; color: var(--text-dim); opacity: 0.7; }
.wm-formats { font-size: 10.5px; color: var(--text-dim); letter-spacing: 0.06em; }

/* Watermark image loaded info */
.wm-info-row {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 14px;
  flex-wrap: wrap;
}
.wm-actions { display: flex; gap: 6px; flex-shrink: 0; }

/* Danger button */
.btn-danger {
  color: var(--red) !important;
  border-color: rgba(224,96,96,0.3) !important;
}
.btn-danger:hover {
  background: rgba(224,96,96,0.1) !important;
  border-color: var(--red) !important;
}

/* Export */
.export-card { padding: 14px 16px; }
.export-btns { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; margin-bottom: 8px; }
.btn-export {
  background: var(--bg3);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text-muted);
  font-family: var(--font-mono);
  font-size: 12px;
  padding: 10px 8px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  transition: all var(--transition);
}
.btn-export:not(:disabled):hover {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-dim);
}
.btn-export:disabled {
  opacity: 0.35;
  cursor: not-allowed;
}
.btn-export:not(:disabled):focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.btn-icon { font-size: 13px; }
.export-hint { font-size: 11px; color: var(--text-dim); text-align: center; }

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  border-radius: 8px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  cursor: pointer;
  border: none;
  transition: all var(--transition);
  text-decoration: none;
}
.btn-primary {
  background: var(--accent);
  color: #fff8f0;
  font-weight: 600;
  padding: 10px 22px;
}
.btn-primary:hover { background: var(--accent2); }
.btn-ghost {
  background: transparent;
  color: var(--text-muted);
  border: 1px solid var(--border);
  padding: 5px 12px;
}
.btn-ghost:hover { border-color: var(--border2); color: var(--text); }
.btn-sm { font-size: 11px; padding: 4px 10px; }
.btn:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

/* Upload labels */
.upload-label { cursor: pointer; }
input[type="file"] {
  position: absolute;
  opacity: 0;
  width: 1px;
  height: 1px;
  pointer-events: none;
}

/* Disclaimer */
.disclaimer {
  font-size: 11px;
  color: var(--text-dim);
  line-height: 1.6;
  padding: 12px 14px;
  background: rgba(224,96,96,0.06);
  border: 1px solid rgba(224,96,96,0.15);
  border-radius: var(--radius);
}

/* Error message */
.error-msg {
  font-size: 11.5px;
  color: var(--red);
  background: rgba(224,96,96,0.08);
  border: 1px solid rgba(224,96,96,0.2);
  border-radius: 8px;
  padding: 8px 12px;
  display: none;
}
.error-msg.visible { display: block; }

/* ── Mobile ── */
@media (max-width: 800px) {
  .app-main {
    grid-template-columns: 1fr;
    padding: 14px 16px;
    gap: 14px;
  }
  .controls-panel { order: 2; }
  .preview-panel  { order: 1; }
  .empty-state {
    min-height: 260px;
    padding: 40px 24px;
  }
  .canvas-wrap { min-height: 260px; }
}

@media (max-width: 480px) {
  .app-header { padding: 0 14px; }
  .header-badge { display: none; }
  .logo-text { font-size: 15px; }
  .export-btns { grid-template-columns: 1fr; }
  .position-grid { aspect-ratio: 2.4; }
  .lang-btn { font-size: 10px; padding: 3px 8px; }
}

/* ── About section ── */
.about-section {
  margin-top: 12px;
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 8px;
  overflow: hidden;
}
.about-summary {
  padding: 10px 14px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--text-muted, #888);
  cursor: pointer;
  user-select: none;
  list-style: none;
}
.about-summary::-webkit-details-marker { display: none; }
.about-summary::before {
  content: '▶';
  display: inline-block;
  margin-right: 6px;
  font-size: 9px;
  transition: transform 0.15s;
}
.about-section[open] .about-summary::before { transform: rotate(90deg); }
.about-body {
  padding: 4px 14px 14px;
  font-size: 12px;
  line-height: 1.7;
  color: var(--text-muted, #888);
}
.about-body p { margin: 0 0 10px; }
.about-body p:last-child { margin-bottom: 0; }
.about-body strong { color: var(--text-secondary, #aaa); }