/* ── CSS-Variablen & Reset ────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --imi-dark:   #05263d;
  --imi-navy:   #0b3c5d;
  --imi-teal:   #00bfae;
  --imi-teal-d: #00897b;
  --imi-bg:     #f8fafc;
  --imi-border: #d1dce6;
  --imi-muted:  #5a7080;
  --imi-light:  #e7f3fd;
  --imi-text:   #1a2634;
  --shadow:     0 4px 12px rgba(0,0,0,.05);
}

/* ── Base & Layout ───────────────────────────────────────────────────────── */
body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  background: var(--imi-bg);
  color: var(--imi-text);
  line-height: 1.6;
  font-size: 15px;
}
.container {
  max-width: 1100px;
  margin: 30px auto;
  padding: 0 20px;
}
.sr-only {
  position: absolute; width: 1px; height: 1px;
  padding: 0; margin: -1px; overflow: hidden;
  clip: rect(0,0,0,0); border: 0;
}
.hidden { display: none !important; }

/* ── Header ──────────────────────────────────────────────────────────────── */
header {
  background: linear-gradient(90deg, var(--imi-dark) 0%, var(--imi-navy) 100%);
  padding: 15px 25px;
  color: #fff;
  box-shadow: 0 2px 8px rgba(0,0,0,.3);
}
.sitename {
  font-size: 24px;
  font-weight: 700;
  text-decoration: none;
  color: #fff;
  display: inline-flex;
  align-items: center;
  gap: 10px;
}
.sitename img { height: 32px; width: auto; }

/* ── Navigation / Breadcrumb ─────────────────────────────────────────────── */
.breadcrumb { margin-top: 8px; font-size: 12px; color: #cbd5e1; }
.breadcrumb a { color: #fff; text-decoration: none; }
.breadcrumb a:hover { color: var(--imi-teal); }
.back-link {
  display: inline-block;
  margin-bottom: 15px;
  text-decoration: none;
  color: var(--imi-navy);
  font-size: 14px;
  font-weight: 700;
}
.back-link:hover { color: var(--imi-teal-d); }

/* ── Intro-Box ───────────────────────────────────────────────────────────── */
.imi-intro {
  background: linear-gradient(90deg, var(--imi-light), #f4faff);
  border-left: 5px solid var(--imi-navy);
  padding: 24px 28px;
  border-radius: 4px;
  margin-bottom: 22px;
}
.imi-intro h2 { margin-bottom: 10px; color: var(--imi-navy); font-size: 20px; }
.imi-intro p  { font-size: 15px; color: #444; }

/* ── Tabs ────────────────────────────────────────────────────────────────── */
.tabs {
  display: flex;
  gap: 4px;
  margin-bottom: 20px;
  background: #fff;
  border: 1px solid var(--imi-border);
  border-radius: 10px;
  padding: 5px;
}
.tab-btn {
  flex: 1;
  padding: 10px 16px;
  border: none;
  background: transparent;
  cursor: pointer;
  font-size: 14px;
  font-weight: 600;
  color: var(--imi-muted);
  border-radius: 7px;
  transition: all .2s;
  font-family: inherit;
  min-height: 44px;
}
.tab-btn.active,
.tab-btn[aria-selected="true"] { background: var(--imi-navy); color: #fff; }
.tab-btn:hover:not(.active) { background: #e3f2fd; color: var(--imi-navy); }
.tab-btn:focus-visible { outline: 3px solid var(--imi-teal); outline-offset: 2px; }
.tab-panel { display: none; }
.tab-panel.active { display: block; }

/* ── Content-Box ─────────────────────────────────────────────────────────── */
.content-box {
  background: #fff;
  border: 1px solid var(--imi-border);
  border-radius: 8px;
  overflow: hidden;
  box-shadow: var(--shadow);
  margin-bottom: 22px;
}
.box-header {
  background: var(--imi-navy);
  color: #fff;
  padding: 12px 20px;
  font-size: 15px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .06em;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.box-body { padding: 24px 28px; }
.tab-desc { font-size: 14px; color: var(--imi-muted); margin-bottom: 18px; }

/* ── Formular-Elemente ───────────────────────────────────────────────────── */
label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  color: var(--imi-muted);
  margin-bottom: 4px;
  margin-top: 14px;
}
label:first-of-type { margin-top: 0; }

input[type=text],
input[type=number],
textarea,
select {
  width: 100%;
  padding: 9px 12px;
  border: 1px solid var(--imi-border);
  border-radius: 6px;
  font-size: 14px;
  font-family: inherit;
  background: #fff;
  color: var(--imi-text);
  transition: border .2s, box-shadow .2s;
}
input:focus, textarea:focus, select:focus {
  outline: none;
  border-color: var(--imi-navy);
  box-shadow: 0 0 0 3px rgba(11,60,93,.12);
}
input:focus-visible, textarea:focus-visible, select:focus-visible {
  outline: 2px solid var(--imi-teal);
  outline-offset: 0;
}
textarea { resize: vertical; }
select { cursor: pointer; }

.check-label {
  display: flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
  font-size: 14px;
  color: var(--imi-text);
  margin-top: 10px;
  font-weight: 400;
}
.check-label input[type=checkbox] {
  width: 16px; height: 16px;
  accent-color: var(--imi-navy);
  margin: 0; padding: 0;
}

.input-error { border-color: #c62828 !important; box-shadow: 0 0 0 3px rgba(198,40,40,.12) !important; }
.hint-error  { color: #c62828 !important; font-weight: 600; }

/* ── Buttons ─────────────────────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 20px;
  border: none;
  border-radius: 6px;
  cursor: pointer;
  font-size: 14px;
  font-weight: 700;
  transition: all .2s;
  font-family: inherit;
  min-height: 44px;
}
.btn:focus-visible { outline: 3px solid var(--imi-teal); outline-offset: 2px; }
.btn-primary  { background: var(--imi-navy); color: #fff; }
.btn-primary:hover  { background: #1565a0; box-shadow: 0 4px 12px rgba(11,60,93,.25); }
.btn-accent   { background: var(--imi-teal); color: #fff; }
.btn-accent:hover   { background: var(--imi-teal-d); }
.btn-outline  { background: #fff; color: var(--imi-navy); border: 2px solid var(--imi-navy); }
.btn-outline:hover  { background: var(--imi-navy); color: #fff; }
.btn-danger   { background: #ef5350; color: #fff; border: none; }
.btn-danger:hover   { background: #c62828; }
.btn-sm  { padding: 6px 14px; font-size: 13px; min-height: 36px; }
.btn-row { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 18px; }

/* ── Status ──────────────────────────────────────────────────────────────── */
.status { font-size: 13px; color: var(--imi-muted); margin-top: 8px; min-height: 20px; }
.status.loading { color: var(--imi-navy); }

/* ── Tool-spezifische Styles ─────────────────────────────────────────────── */

/* --- Generator --- */
.templates-row {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  align-items: center;
  margin-bottom: 18px;
  padding: 10px 14px;
  background: #f0f7ff;
  border: 1px solid #c3d9f0;
  border-radius: 8px;
}
.templates-label {
  font-size: 12px;
  font-weight: 700;
  color: var(--imi-muted);
  text-transform: uppercase;
  letter-spacing: .05em;
  margin-right: 4px;
  white-space: nowrap;
}
.tpl-btn {
  background: #fff;
  border: 1px solid var(--imi-border);
  border-radius: 5px;
  padding: 4px 10px;
  font-size: 12px;
  font-weight: 600;
  cursor: pointer;
  color: var(--imi-navy);
  transition: all .15s;
  font-family: inherit;
  min-height: 30px;
}
.tpl-btn:hover { background: var(--imi-navy); color: #fff; border-color: var(--imi-navy); }
.tpl-btn:focus-visible { outline: 2px solid var(--imi-teal); outline-offset: 2px; }

.gen-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 28px;
  align-items: start;
}
.gen-options {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-top: 14px;
}

/* Result box */
.result-box {
  background: #f7fafd;
  border: 1px solid var(--imi-border);
  border-radius: 10px;
  padding: 20px;
  text-align: center;
  min-height: 120px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}
.result-box .placeholder-msg {
  color: var(--imi-muted);
  font-size: 13px;
}
#barcode-svg svg { max-width: 100%; height: auto; }
#qr-canvas { display: inline-block; }

.result-badge {
  background: #fff;
  border: 1px solid var(--imi-border);
  border-radius: 10px;
  overflow: hidden;
  text-align: left;
  width: 100%;
  margin-top: 14px;
}
.result-badge-header {
  background: var(--imi-navy);
  color: #fff;
  padding: 10px 16px;
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}
.result-fmt-badge {
  background: rgba(255,255,255,.18);
  border: 1px solid rgba(255,255,255,.3);
  border-radius: 4px;
  padding: 2px 10px;
  font-size: 13px;
  font-weight: 700;
}
.result-len { font-size: 12px; opacity: .7; margin-left: auto; }
.result-badge-body { padding: 14px 16px; }
.result-content-label {
  font-size: 11px; font-weight: 700; color: var(--imi-muted);
  text-transform: uppercase; letter-spacing: .06em; margin-bottom: 6px;
}
.result-content-text {
  font-size: 15px; word-break: break-all;
  background: #f0f7ff; border: 1px solid #c3d9f0; border-radius: 6px;
  padding: 10px 12px; font-family: monospace; line-height: 1.5; margin-bottom: 10px;
}
.result-link { display: inline-block; font-size: 13px; color: var(--imi-navy); margin-bottom: 10px; text-decoration: none; }
.result-link:hover { text-decoration: underline; }
.error-badge {
  display: inline-block;
  margin-top: 14px;
  padding: 12px 20px;
  background: #fff5f5;
  border: 1px solid #ffcdd2;
  border-radius: 10px;
  font-size: 14px;
  color: #c62828;
}

/* --- Batch --- */
.batch-options {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-bottom: 14px;
}
.batch-presets {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  align-items: center;
  margin: 10px 0 0;
}
.batch-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 14px;
  margin-top: 20px;
}
.batch-item {
  background: #f7fafd;
  border: 1px solid var(--imi-border);
  border-radius: 8px;
  padding: 12px;
  text-align: center;
  position: relative;
}
.batch-item canvas,
.batch-item svg { max-width: 100%; height: auto; }
.batch-item-label {
  font-size: 11px;
  color: var(--imi-muted);
  margin-top: 6px;
  word-break: break-all;
  line-height: 1.4;
}
.batch-item-remove {
  position: absolute;
  top: 4px; right: 6px;
  background: none;
  border: none;
  cursor: pointer;
  font-size: 16px;
  color: #aaa;
  line-height: 1;
  padding: 2px;
}
.batch-item-remove:hover { color: #c62828; }

/* --- Etiketten --- */
.label-setup-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 28px;
}
.label-setup-col { }
.setup-title {
  display: block;
  font-size: 13px;
  font-weight: 700;
  color: var(--imi-navy);
  text-transform: uppercase;
  letter-spacing: .06em;
  margin-bottom: 10px;
}
.format-presets {
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.fmt-btn {
  background: #fff;
  border: 2px solid var(--imi-border);
  border-radius: 7px;
  padding: 8px 14px;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  text-align: left;
  color: var(--imi-navy);
  transition: all .15s;
  font-family: inherit;
  line-height: 1.4;
}
.fmt-btn small { font-weight: 400; color: var(--imi-muted); }
.fmt-btn:hover { border-color: var(--imi-teal); background: #f0fdfc; }
.fmt-btn.active { border-color: var(--imi-navy); background: var(--imi-light); }
.fmt-btn:focus-visible { outline: 2px solid var(--imi-teal); outline-offset: 2px; }

.custom-format { margin-top: 12px; }
.dim-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}
.label-content-opts { }
.label-count-info {
  margin-top: 14px;
  font-size: 13px;
  font-weight: 700;
  color: var(--imi-navy);
  background: var(--imi-light);
  border-left: 4px solid var(--imi-navy);
  padding: 8px 12px;
  border-radius: 4px;
}

.preview-title {
  font-size: 13px;
  font-weight: 700;
  color: var(--imi-muted);
  text-transform: uppercase;
  letter-spacing: .05em;
  margin-bottom: 10px;
}
.label-preview {
  background: #fff;
  border: 1px solid var(--imi-border);
  border-radius: 6px;
  padding: 16px;
  overflow: auto;
  max-height: 500px;
}
.label-preview-page {
  background: #fff;
  border: 1px solid #ccc;
  margin: 0 auto;
  position: relative;
  overflow: hidden;
}
.label-cell {
  position: absolute;
  border: 1px dashed rgba(11,60,93,.15);
  box-sizing: border-box;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  padding: 2px;
  background: #fff;
}
.label-cell svg,
.label-cell canvas,
.label-cell img {
  max-width: 100%;
  max-height: 70%;
  object-fit: contain;
}
.label-cell-text {
  font-size: 7px;
  color: #333;
  text-align: center;
  word-break: break-all;
  line-height: 1.3;
}
.label-cell-title {
  font-size: 6px;
  font-weight: 700;
  color: var(--imi-navy);
  text-transform: uppercase;
  letter-spacing: .04em;
}
.label-cell-badge {
  font-size: 6px;
  background: var(--imi-navy);
  color: #fff;
  padding: 1px 4px;
  border-radius: 2px;
  font-weight: 700;
}

.label-stack-list {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-top: 6px;
}
.label-stack-item {
  display: flex;
  align-items: center;
  gap: 10px;
  background: #f7fafd;
  border: 1px solid var(--imi-border);
  border-radius: 6px;
  padding: 6px 12px;
  font-size: 13px;
}
.label-stack-item span { flex: 1; word-break: break-all; }
.label-stack-item button {
  background: none;
  border: none;
  cursor: pointer;
  color: #aaa;
  font-size: 16px;
  padding: 2px;
}
.label-stack-item button:hover { color: #c62828; }

/* --- Reader --- */
.drop-zone {
  border: 2px dashed var(--imi-border);
  border-radius: 10px;
  padding: 40px 20px;
  text-align: center;
  cursor: pointer;
  transition: border-color .2s, background .2s;
  color: var(--imi-muted);
  background: #fff;
}
.drop-zone:hover,
.drop-zone.dragover { border-color: var(--imi-teal); background: rgba(0,191,174,.04); }
.drop-zone:focus-visible { outline: 2px solid var(--imi-teal); outline-offset: 2px; border-color: var(--imi-teal); }
.drop-zone svg { width: 40px; height: 40px; margin-bottom: 12px; opacity: .4; }
.dz-title { font-weight: 600; font-size: 15px; }
.dz-sub { font-size: 13px; margin-top: 4px; }

#preview-img {
  max-width: 100%;
  max-height: 320px;
  border-radius: 6px;
  margin-top: 16px;
  display: none;
  border: 1px solid var(--imi-border);
}
#read-result { margin-top: 10px; }

/* Tips */
.tips-box {
  background: #f0f7ff;
  border: 1px solid #c3d9f0;
  border-radius: 8px;
  overflow: hidden;
}
.tips-header {
  width: 100%;
  background: none;
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 16px;
  font-size: 14px;
  font-family: inherit;
  color: var(--imi-text);
}
.tips-header:focus-visible { outline: 2px solid var(--imi-teal); outline-offset: -2px; }
.tips-toggle-icon { margin-left: auto; font-size: 12px; color: var(--imi-muted); }
.tips-body { padding: 0 16px 16px; }
.tip-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); gap: 10px; }
.tip-item {
  background: #fff;
  border-radius: 7px;
  padding: 10px 12px;
  border-left: 4px solid var(--imi-border);
}
.tip-item p { margin: 6px 0 0; color: var(--imi-muted); font-size: 13px; line-height: 1.5; }
.tip-item strong { font-size: 13px; color: var(--imi-text); }
.tip-icon { font-size: 18px; margin-bottom: 4px; }
.tip-good { border-left-color: var(--imi-teal); }
.tip-warn { border-left-color: #f57c00; }
.tip-info { border-left-color: var(--imi-navy); }

.btn-row-top { margin-top: 20px; }
.btn-row-sm  { margin-top: 12px; }
.tips-box-mt { margin-top: 20px; }

/* ── Footer ──────────────────────────────────────────────────────────────── */
footer {
  text-align: center;
  font-size: 13px;
  color: #64748b;
  margin-top: 40px;
  padding-bottom: 30px;
}
footer a { color: var(--imi-navy); text-decoration: none; margin: 0 10px; }
footer a:hover { color: var(--imi-teal-d); }

/* ── Responsive ──────────────────────────────────────────────────────────── */
@media (max-width: 760px) {
  .gen-grid { grid-template-columns: 1fr; }
  .label-setup-grid { grid-template-columns: 1fr; }
  .batch-options { grid-template-columns: 1fr; }
  .gen-options { grid-template-columns: 1fr; }
  .tabs { flex-wrap: wrap; }
  .tab-btn { flex: none; width: calc(50% - 2px); }
}
@media (max-width: 480px) {
  .box-body { padding: 16px; }
  .container { padding: 0 12px; }
  .tab-btn { width: 100%; }
  .btn-row { flex-direction: column; }
  .btn { width: 100%; justify-content: center; }
  .templates-row { flex-direction: column; align-items: flex-start; }
  .batch-grid { grid-template-columns: 1fr 1fr; }
  .dim-grid { grid-template-columns: 1fr; }
}