/* ===== QR Studio — mobile-first ===== */

* { box-sizing: border-box; }

:root {
  --accent-a: #6366f1;
  --accent-b: #22d3ee;
  --accent-grad: linear-gradient(120deg, var(--accent-a), var(--accent-b));
  --radius: 16px;
  --radius-sm: 10px;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", sans-serif;
}

:root[data-theme="light"] {
  --bg: #f5f6fa;
  --card: #ffffff;
  --card-2: #f2f3f8;
  --text: #16181f;
  --text-dim: #6b7080;
  --border: #e4e6ef;
  --shadow: 0 4px 24px rgba(30, 34, 60, .07);
  --input-bg: #f7f8fc;
  color-scheme: light;
}

:root[data-theme="dark"] {
  --bg: #0f1117;
  --card: #181b24;
  --card-2: #1f2330;
  --text: #eceef4;
  --text-dim: #9aa0b0;
  --border: #2a2f3e;
  --shadow: 0 4px 24px rgba(0, 0, 0, .35);
  --input-bg: #12141c;
  color-scheme: dark;
}

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

/* ===== Header ===== */

.app-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: color-mix(in srgb, var(--bg) 82%, transparent);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.header-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: .7rem 1rem;
  padding-left: max(1rem, env(safe-area-inset-left));
  padding-right: max(1rem, env(safe-area-inset-right));
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.brand { display: flex; align-items: center; gap: .7rem; }
.brand-mark { display: grid; place-items: center; }
.brand h1 { font-size: 1.15rem; margin: 0; letter-spacing: -.02em; }
.tagline { margin: 0; font-size: .72rem; color: var(--text-dim); }

:root[data-theme="light"] .icon-moon { display: none; }
:root[data-theme="dark"] .icon-sun { display: none; }

/* ===== Layout ===== */

.layout {
  max-width: 1200px;
  margin: 0 auto;
  padding: 1rem;
  padding-left: max(1rem, env(safe-area-inset-left));
  padding-right: max(1rem, env(safe-area-inset-right));
  display: grid;
  gap: 1rem;
}

@media (min-width: 900px) {
  .layout {
    grid-template-columns: minmax(0, 1fr) 400px;
    align-items: start;
    padding: 1.5rem;
    gap: 1.5rem;
  }
  .col-preview { position: sticky; top: 76px; }
}

.col-editor, .col-preview { display: grid; gap: 1rem; min-width: 0; }

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 1.1rem;
  min-width: 0; /* Grid-Item darf nicht auf Inhaltsbreite (Chip-Leiste) aufgehen */
}

.card-title { margin: 0 0 .9rem; font-size: 1rem; letter-spacing: -.01em; }

/* ===== Typ-Chips ===== */

.type-chips {
  display: flex;
  gap: .5rem;
  overflow-x: auto;
  padding-bottom: .6rem;
  margin: 0 -1.1rem;
  padding-left: 1.1rem;
  padding-right: 1.1rem;
  scrollbar-width: thin;
  -webkit-overflow-scrolling: touch;
}

.chip {
  flex: 0 0 auto;
  display: flex;
  align-items: center;
  gap: .45rem;
  padding: .55rem .9rem;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--card-2);
  color: var(--text);
  font: inherit;
  font-size: .85rem;
  font-weight: 500;
  cursor: pointer;
  transition: all .15s ease;
  min-height: 44px;
}

.chip:hover { border-color: var(--accent-a); }

.chip.active {
  background: var(--accent-grad);
  border-color: transparent;
  color: #fff;
  box-shadow: 0 3px 12px rgba(99, 102, 241, .35);
}

.chip-icon { display: grid; place-items: center; }
.chip-icon svg { width: 17px; height: 17px; }

/* ===== Formulare ===== */

.type-form { display: grid; grid-template-columns: 1fr 1fr; gap: .8rem .8rem; margin-top: 1rem; }
.type-form .field { grid-column: 1 / -1; }
@media (min-width: 480px) { .type-form .field.half { grid-column: auto; } }

.field { display: grid; gap: .35rem; margin: 0 0 .2rem; }
.field.row { grid-auto-flow: column; justify-content: start; gap: 1rem; align-items: end; }

.field > label:not(.check):not(.color-field),
.acc-body .field > label:first-child {
  font-size: .8rem;
  font-weight: 600;
  color: var(--text-dim);
}

input[type="text"], input[type="url"], input[type="tel"], input[type="email"],
input[type="number"], input[type="datetime-local"], textarea, select {
  width: 100%;
  font: inherit;
  font-size: .95rem;
  color: var(--text);
  background: var(--input-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: .65rem .8rem;
  transition: border-color .15s ease, box-shadow .15s ease;
  min-height: 44px;
}

textarea { resize: vertical; min-height: 70px; }

input:focus, textarea:focus, select:focus {
  outline: none;
  border-color: var(--accent-a);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent-a) 20%, transparent);
}

.field.has-error input, .field.has-error textarea, .field.has-error select { border-color: #ef4444; }
.field-error { margin: 0; font-size: .75rem; color: #ef4444; }

.check {
  display: flex;
  align-items: center;
  gap: .55rem;
  font-size: .9rem;
  cursor: pointer;
  min-height: 32px;
}

input[type="checkbox"] {
  width: 19px; height: 19px;
  accent-color: var(--accent-a);
  cursor: pointer;
}

.hint { font-size: .78rem; color: var(--text-dim); margin: .4rem 0 0; }

/* ===== Accordions ===== */

.acc {
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  margin-bottom: .6rem;
  background: var(--card-2);
  overflow: hidden;
}

.acc summary {
  cursor: pointer;
  padding: .8rem 1rem;
  font-weight: 600;
  font-size: .9rem;
  list-style: none;
  display: flex;
  align-items: center;
  user-select: none;
  min-height: 48px;
}

.acc summary::-webkit-details-marker { display: none; }
.acc summary::after {
  content: "";
  margin-left: auto;
  width: 8px; height: 8px;
  border-right: 2px solid var(--text-dim);
  border-bottom: 2px solid var(--text-dim);
  transform: rotate(45deg);
  transition: transform .2s ease;
}
.acc[open] summary::after { transform: rotate(225deg); }

.acc-body { padding: .2rem 1rem 1rem; display: grid; gap: .8rem; }

/* ===== Segmented ===== */

.seg {
  display: inline-flex;
  background: var(--input-bg);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 3px;
  gap: 2px;
  flex-wrap: wrap;
}

.seg-btn {
  border: 0;
  background: transparent;
  color: var(--text-dim);
  font: inherit;
  font-size: .82rem;
  font-weight: 600;
  padding: .42rem .85rem;
  border-radius: 999px;
  cursor: pointer;
  transition: all .15s ease;
  min-height: 36px;
}

.seg-btn.active { background: var(--accent-grad); color: #fff; }

/* ===== Farb-Controls ===== */

.color-field {
  display: flex;
  align-items: center;
  gap: .5rem;
  font-size: .85rem;
  cursor: pointer;
}

input[type="color"] {
  width: 42px; height: 42px;
  padding: 0;
  border: 2px solid var(--border);
  border-radius: 12px;
  background: none;
  cursor: pointer;
}
input[type="color"]::-webkit-color-swatch-wrapper { padding: 3px; }
input[type="color"]::-webkit-color-swatch { border: none; border-radius: 8px; }

.inline-select { display: flex; flex-direction: column; gap: .3rem; font-size: .8rem; font-weight: 600; color: var(--text-dim); }
.inline-select select { min-width: 110px; }

.inline-range { display: grid; gap: .3rem; font-size: .8rem; font-weight: 600; color: var(--text-dim); flex: 1; }
.range-val { float: right; color: var(--text); font-weight: 500; }
.inline-range .range-val { justify-self: end; margin-top: -1.35rem; }

input[type="range"] {
  width: 100%;
  accent-color: var(--accent-a);
  min-height: 32px;
}

/* ===== Stil-Picker ===== */

.style-picker { display: flex; flex-wrap: wrap; gap: .5rem; }

.style-opt {
  display: grid;
  gap: .3rem;
  justify-items: center;
  padding: .6rem .5rem .5rem;
  min-width: 66px;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--card);
  color: var(--text);
  font: inherit;
  font-size: .68rem;
  cursor: pointer;
  transition: all .15s ease;
}

.style-opt svg { width: 24px; height: 24px; }
.style-opt:hover { border-color: var(--accent-a); }
.style-opt.active {
  border-color: var(--accent-a);
  background: color-mix(in srgb, var(--accent-a) 10%, var(--card));
  color: var(--accent-a);
}

/* ===== Vorlagen ===== */

.preset-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: .55rem; }

.preset {
  display: grid;
  gap: .35rem;
  justify-items: center;
  border: 1.5px solid var(--border);
  background: var(--card);
  color: var(--text);
  border-radius: var(--radius-sm);
  padding: .55rem .3rem .5rem;
  font: inherit;
  font-size: .7rem;
  cursor: pointer;
  transition: all .15s ease;
}

.preset:hover { border-color: var(--accent-a); transform: translateY(-1px); }

.preset-swatch {
  width: 40px; height: 40px;
  border-radius: 10px;
  border: 1px solid var(--border);
  display: grid;
  place-items: center;
}

.preset-dot { width: 20px; height: 20px; border-radius: 6px; }

/* ===== Icon-Grid (Logos) ===== */

.icon-grid { display: flex; flex-wrap: wrap; gap: .5rem; }

.icon-opt {
  width: 46px; height: 46px;
  padding: 5px;
  border: 1.5px solid var(--border);
  border-radius: 12px;
  background: var(--card);
  cursor: pointer;
  transition: all .15s ease;
}

.icon-opt svg { width: 100%; height: 100%; }
.icon-opt:hover { border-color: var(--accent-a); }
.icon-opt.active { border-color: var(--accent-a); box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent-a) 25%, transparent); }

.logo-upload { display: flex; gap: .6rem; align-items: center; }

/* ===== Rahmen-Picker ===== */

.frame-picker { display: flex; flex-wrap: wrap; gap: .5rem; }

.frame-opt {
  display: grid;
  gap: .3rem;
  justify-items: center;
  padding: .55rem .55rem .5rem;
  min-width: 64px;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--card);
  color: var(--text);
  font: inherit;
  font-size: .68rem;
  cursor: pointer;
  transition: all .15s ease;
}

.frame-opt:hover { border-color: var(--accent-a); }
.frame-opt.active { border-color: var(--accent-a); color: var(--accent-a); }

.frame-mini {
  width: 34px; height: 40px;
  display: grid;
  place-items: center;
  position: relative;
}
.frame-mini i {
  width: 26px; height: 26px;
  border: 2px solid currentColor;
  border-radius: 4px;
  opacity: .75;
}
.frame-mini[data-frame="label-bottom"]::after,
.frame-mini[data-frame="card"]::after {
  content: "";
  position: absolute;
  bottom: 1px;
  width: 22px; height: 5px;
  border-radius: 3px;
  background: currentColor;
  opacity: .75;
}
.frame-mini[data-frame="badge-top"]::before {
  content: "";
  position: absolute;
  top: 0;
  width: 18px; height: 5px;
  border-radius: 3px;
  background: currentColor;
  opacity: .75;
}
.frame-mini[data-frame="none"] i { border-style: dashed; opacity: .4; }

/* ===== Vorschau ===== */

.preview-card { text-align: center; }

.preview-stage {
  display: grid;
  place-items: center;
  padding: .5rem 0 1rem;
  min-height: 220px;
}

.preview-stage.is-empty .preview-frame { opacity: .18; filter: grayscale(1); }

.preview-frame {
  --frame-color: #6366f1;
  --frame-text-color: #fff;
  display: inline-grid;
  justify-items: center;
  transition: opacity .2s ease;
  max-width: 100%;
}

.qr-canvas { display: grid; place-items: center; border-radius: 12px; overflow: hidden; }
.qr-canvas canvas { max-width: min(300px, 68vw); height: auto !important; width: auto; display: block; }

/* Umschalten zwischen Standard-Canvas (Bibliothek) und Halftone-Canvas */
.preview-frame.art-active #qrPreview { display: none; }
.preview-frame:not(.art-active) #artWrap { display: none; }

.preview-frame[data-frame="label-bottom"] {
  background: var(--frame-color);
  padding: 12px;
  border-radius: 18px;
}
.preview-frame[data-frame="label-bottom"] .qr-canvas { background: #fff; padding: 4px; }

.preview-frame[data-frame="card"] {
  background: #fff;
  border: 3px solid var(--frame-color);
  padding: 14px;
  border-radius: 18px;
}

.preview-frame[data-frame="badge-top"] {
  background: #fff;
  border: 3px solid var(--frame-color);
  padding: 14px;
  border-radius: 18px;
  position: relative;
  margin-top: 16px;
}

.preview-frame-label {
  margin-top: 10px;
  font-weight: 700;
  font-size: .95rem;
  letter-spacing: .06em;
  color: var(--frame-text-color);
}

.preview-frame[data-frame="card"] .preview-frame-label { color: var(--frame-color); }

.preview-frame[data-frame="badge-top"] .preview-frame-label {
  position: absolute;
  top: -16px;
  left: 50%;
  transform: translateX(-50%);
  margin: 0;
  background: var(--frame-color);
  padding: .3rem .9rem;
  border-radius: 999px;
  font-size: .8rem;
  white-space: nowrap;
}

.preview-empty { color: var(--text-dim); font-size: .85rem; margin: 0 0 1rem; }

.form-errors { color: #ef4444; font-size: .82rem; margin-bottom: .8rem; }

/* ===== Export ===== */

.export-bar { display: grid; gap: .8rem; border-top: 1px solid var(--border); padding-top: 1rem; }

.export-opts { display: flex; gap: 1rem; justify-content: center; }

.export-actions { display: flex; gap: .6rem; flex-wrap: wrap; justify-content: center; }

.btn {
  display: inline-flex;
  align-items: center;
  gap: .45rem;
  font: inherit;
  font-size: .88rem;
  font-weight: 600;
  padding: .65rem 1.15rem;
  border-radius: 999px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: all .15s ease;
  min-height: 44px;
}

.btn-primary {
  background: var(--accent-grad);
  color: #fff;
  box-shadow: 0 3px 14px rgba(99, 102, 241, .4);
}
.btn-primary:hover { transform: translateY(-1px); box-shadow: 0 5px 18px rgba(99, 102, 241, .5); }

.btn-secondary {
  background: var(--card-2);
  border-color: var(--border);
  color: var(--text);
}
.btn-secondary:hover { border-color: var(--accent-a); }

.btn-ghost { background: transparent; color: var(--text-dim); }
.btn-ghost:hover { color: #ef4444; }
.btn-small { font-size: .78rem; padding: .4rem .7rem; min-height: 34px; }

.upload-btn { cursor: pointer; }

.icon-btn {
  display: grid;
  place-items: center;
  width: 40px; height: 40px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: var(--card);
  color: var(--text);
  cursor: pointer;
  transition: all .15s ease;
}
.icon-btn:hover { border-color: var(--accent-a); color: var(--accent-a); }

/* ===== Verlauf ===== */

.history-head { display: flex; align-items: center; justify-content: space-between; }
.history-head .card-title { margin-bottom: .5rem; }

.history-list { list-style: none; margin: 0; padding: 0; display: grid; gap: .45rem; }

.history-item {
  display: flex;
  align-items: center;
  gap: .7rem;
  padding: .55rem .7rem;
  background: var(--card-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
}

.history-icon { color: var(--accent-a); display: grid; place-items: center; flex-shrink: 0; }
.history-icon svg { width: 19px; height: 19px; }

.history-info { flex: 1; min-width: 0; display: grid; }
.history-label {
  font-size: .85rem;
  font-weight: 500;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.history-date { font-size: .72rem; color: var(--text-dim); }

.history-item .icon-btn { width: 34px; height: 34px; border-radius: 9px; flex-shrink: 0; }
.history-delete:hover { border-color: #ef4444; color: #ef4444; }

/* ===== FAB (mobil: zur Vorschau springen) ===== */

.fab {
  position: fixed;
  right: 1rem;
  bottom: calc(1.2rem + env(safe-area-inset-bottom));
  z-index: 30;
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  font: inherit;
  font-size: .85rem;
  font-weight: 700;
  color: #fff;
  background: var(--accent-grad);
  border: 0;
  border-radius: 999px;
  padding: .7rem 1.1rem;
  box-shadow: 0 6px 20px rgba(99, 102, 241, .45);
  cursor: pointer;
}

@media (min-width: 900px) { .fab { display: none; } }

/* ===== Footer & Toast ===== */

.app-footer {
  text-align: center;
  color: var(--text-dim);
  font-size: .78rem;
  padding: 1.5rem 1rem calc(2rem + env(safe-area-inset-bottom));
}

.toast {
  position: fixed;
  left: 50%;
  bottom: calc(1.4rem + env(safe-area-inset-bottom));
  transform: translateX(-50%) translateY(20px);
  background: var(--text);
  color: var(--bg);
  padding: .6rem 1.2rem;
  border-radius: 999px;
  font-size: .85rem;
  font-weight: 500;
  opacity: 0;
  pointer-events: none;
  transition: all .25s ease;
  z-index: 100;
  max-width: 88vw;
}

.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; animation: none !important; }
  html { scroll-behavior: auto; }
}