:root {
  --bg-color: #f4f6f8;
  --card-bg: #ffffff;
  --text-main: #1e293b;
  --text-muted: #64748b;
  --border-color: #cbd5e1;
  --btn-bg: #0f172a;
  --btn-text: #ffffff;
  --btn-hover: #334155;
  --accent: #2563eb;
  --accent-hover: #1d4ed8;
  --result-bg: #f8fafc;
}

[data-theme="dark"] {
  --bg-color: #0f172a;
  --card-bg: #1e293b;
  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --border-color: #334155;
  --btn-bg: #f8fafc;
  --btn-text: #0f172a;
  --btn-hover: #e2e8f0;
  --accent: #3b82f6;
  --accent-hover: #60a5fa;
  --result-bg: #0b1120;
}

* {
  box-sizing: border-box;
  transition: background-color 0.15s ease, border-color 0.15s ease;
}

body {
  margin: 0;
  min-height: 100vh;
  background-color: var(--bg-color);
  color: var(--text-main);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  display: flex;
  justify-content: center;
  align-items: flex-start;
  padding: 20px 15px 40px;
}

.layout-container {
  width: 100%;
  max-width: 860px;
}

.header-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 16px;
}

h1 {
  margin: 0;
  font-size: 24px;
  font-weight: 800;
  letter-spacing: -0.5px;
}

.subtitle {
  color: var(--text-muted);
  margin-top: 2px;
  font-size: 13px;
}

.theme-btn {
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  color: var(--text-main);
  padding: 6px 12px;
  border-radius: 20px;
  cursor: pointer;
  font-size: 12px;
  font-weight: 500;
}

.main-panel {
  margin-bottom: 16px;
}

.bottom-utilities-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  align-items: stretch;
}

.panel-box {
  background: var(--card-bg);
  padding: 20px;
  border-radius: 14px;
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.05);
}

.panel-title {
  margin: 0 0 12px 0;
  font-size: 15px;
  font-weight: 700;
}

.field-stack {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

textarea {
  width: 100%;
  min-height: 140px;
  resize: vertical;
  padding: 12px;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  font-size: 14px;
  font-family: inherit;
  background: var(--card-bg);
  color: var(--text-main);
  outline: none;
}

textarea:focus, input:focus, select:focus {
  border-color: var(--accent);
}

.row {
  display: flex;
  gap: 10px;
  margin-top: 10px;
}

input, select, button {
  padding: 10px 12px;
  border-radius: 8px;
  border: 1px solid var(--border-color);
  font-size: 13px;
  font-family: inherit;
}

input[type="password"], select, .text-input-field {
  width: 100%;
  background: var(--card-bg);
  color: var(--text-main);
}

.output-field {
  width: 100%;
  background: var(--result-bg) !important;
  font-family: monospace;
  font-size: 14px;
  font-weight: 700;
  color: var(--text-main);
}

button {
  cursor: pointer;
  background: var(--btn-bg);
  color: var(--btn-text);
  border: none;
  font-weight: 600;
}

button:hover {
  background: var(--btn-hover);
}

.primary-btn {
  width: 100%;
  padding: 12px;
  border-radius: 8px;
}

.aligned-btn-row {
  display: flex;
  gap: 8px;
}

.action-btn {
  flex: 1;
  padding: 10px;
  font-size: 12px;
  text-align: center;
  white-space: nowrap;
}

.sm-refresh-btn {
  margin-top: 6px;
  padding: 10px;
  font-size: 12px;
}

.accent-btn {
  background: var(--accent) !important;
  color: #fff !important;
}

.accent-btn:hover {
  background: var(--accent-hover) !important;
}

#result {
  display: none;
  margin-top: 14px;
  padding: 14px;
  background: var(--result-bg);
  border: 1px solid var(--border-color);
  border-radius: 10px;
}

#link {
  width: 100%;
  padding: 8px;
  margin-top: 4px;
  background: var(--card-bg);
  color: var(--text-main);
  border: 1px solid var(--border-color);
  border-radius: 6px;
  font-family: monospace;
  font-size: 12px;
}

.result-actions {
  display: flex;
  gap: 8px;
  margin-top: 10px;
}

.result-actions button {
  flex: 1;
  padding: 8px;
  font-size: 12px;
}

#qrcode-container {
  display: none;
  margin-top: 12px;
  text-align: center;
}

#qrcode {
  display: inline-block;
  padding: 10px;
  background: #ffffff !important;
  border-radius: 8px;
}

#qrcode canvas { display: none !important; }
#qrcode img { display: block !important; margin: 0 auto; width: 140px; height: 140px; }

/* File Uploader */
.file-uploader-wrap {
  margin-top: 10px;
  width: 100%;
}

.hidden-file-input { display: none !important; }

.file-dropzone {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  width: 100%;
  padding: 10px;
  border: 1px dashed var(--border-color);
  border-radius: 8px;
  cursor: pointer;
  background: var(--card-bg);
  color: var(--text-muted);
  font-size: 12px;
}

.file-dropzone:hover {
  border-color: var(--accent);
  color: var(--text-main);
}

.file-limit { font-size: 11px; opacity: 0.7; }

.file-selected-badge {
  display: none;
  align-items: center;
  justify-content: space-between;
  padding: 8px 12px;
  background: var(--result-bg);
  border: 1px solid var(--border-color);
  border-radius: 7px;
}

.file-selected-badge.active { display: flex !important; }
.file-dropzone.hidden { display: none !important; }

.file-details {
  display: flex;
  align-items: center;
  gap: 6px;
  overflow: hidden;
}

.file-name {
  font-size: 12px;
  font-weight: 500;
  color: var(--text-main);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 280px;
}

.file-size { font-size: 11px; color: var(--text-muted); }

.file-remove-btn {
  background: transparent !important;
  border: none !important;
  color: var(--text-muted) !important;
  cursor: pointer;
  font-size: 14px;
  padding: 2px 6px !important;
}

.file-remove-btn:hover { color: #ef4444 !important; }

/* Password Settings */
.gen-setting {
  margin: 4px 0;
}

.gen-setting-label {
  display: flex;
  justify-content: space-between;
  font-size: 12px;
  margin-bottom: 4px;
}

input[type="range"] {
  width: 100%;
  accent-color: var(--accent);
  cursor: pointer;
  height: 4px;
}

.gen-checkboxes-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 6px 10px;
}

.gen-checkbox-label {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  cursor: pointer;
}

.gen-checkbox-label input[type="checkbox"] {
  width: 14px;
  height: 14px;
  accent-color: var(--accent);
}

.warning {
  margin-top: 20px;
  font-size: 12px;
  color: var(--text-muted);
  line-height: 1.4;
  text-align: center;
}

@media (max-width: 760px) {
  .bottom-utilities-grid { grid-template-columns: 1fr; }
  .row { flex-direction: column; }
  body { padding: 12px 10px 30px; }
}