/**
 * Responsive Design Tester — Styles
 * (c) 2026 Eric Bernstein
 *
 * Shares the visual language with /tools/exif/style.css (Inter, Stripe-indigo,
 * Apple-style cards). Self-contained — does not import the exif CSS so the
 * two tools stay decoupled.
 */

:root {
  /* Surface */
  --bg:           #fbfbfd;
  --bg-section:   #ffffff;
  --surface:      #ffffff;
  --surface-soft: #f5f5f7;
  --surface-inset:#f7f7fa;
  --surface-code: #0a0a0c;

  /* Foreground */
  --fg:           #1d1d1f;
  --fg-strong:    #0a0a0c;
  --fg-muted:     #6e6e73;
  --fg-subtle:    #86868b;
  --fg-faint:     #b5b5b9;

  /* Borders */
  --border:        rgba(0,0,0,0.08);
  --border-strong: rgba(0,0,0,0.14);
  --border-soft:   rgba(0,0,0,0.04);

  /* Accents */
  --indigo:        #635bff;
  --indigo-deep:   #4a40e0;
  --indigo-soft:   rgba(99,91,255,0.08);
  --indigo-text:   #4a40e0;
  --pink:          #ff385c;
  --pink-soft:     rgba(255,56,92,0.08);

  /* Status */
  --ok:            #1f8a4c;
  --ok-bg:         rgba(31,138,76,0.08);
  --warn:          #b45309;
  --warn-bg:       rgba(180,83,9,0.08);

  /* Shadows */
  --shadow-1:           0 1px 2px rgba(0,0,0,0.05), 0 4px 14px rgba(0,0,0,0.06);
  --shadow-2:           0 1px 3px rgba(0,0,0,0.06), 0 10px 28px rgba(0,0,0,0.10);
  --shadow-card:        0 1px 3px rgba(0,0,0,0.05), 0 8px 24px rgba(0,0,0,0.07);
  --shadow-card-hover:  0 2px 6px rgba(0,0,0,0.07), 0 16px 40px rgba(0,0,0,0.12);
  --shadow-focus:       0 0 0 3px rgba(99,91,255,0.55), 0 0 0 6px rgba(99,91,255,0.18);

  /* Radius */
  --r-1: 8px; --r-2: 12px; --r-3: 16px; --r-4: 20px; --r-5: 28px;

  /* Spacing */
  --sp-1: 4px; --sp-2: 8px; --sp-3: 12px; --sp-4: 16px;
  --sp-5: 20px; --sp-6: 24px; --sp-7: 32px; --sp-8: 48px;
  --sp-9: 64px; --sp-10: 96px;

  /* Typography */
  --font-display:
    'Inter', -apple-system, BlinkMacSystemFont, 'SF Pro Display',
    'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  --font-text:
    'Inter', -apple-system, BlinkMacSystemFont, 'SF Pro Text',
    'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  --font-mono:
    'JetBrains Mono', ui-monospace, 'SF Mono', Menlo, Consolas, monospace;

  --ease: cubic-bezier(0.32, 0.72, 0, 1);
}

/* ========== Reset ========== */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--font-text);
  font-size: 16px;
  line-height: 1.55;
  background: var(--bg);
  color: var(--fg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  min-height: 100vh;
}
@supports (height: 100dvh) {
  body { min-height: 100dvh; }
}
a { color: var(--indigo-text); text-decoration: none; }
a:hover { text-decoration: underline; }
button { font: inherit; cursor: pointer; }
input, select { font: inherit; }
img { max-width: 100%; }
::selection { background: var(--indigo-soft); color: var(--indigo-deep); }

.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0;
  margin: -1px; overflow: hidden; clip: rect(0,0,0,0); border: 0;
}
.skip-link {
  position: absolute; top: -100px; left: 12px;
  background: var(--fg-strong); color: #fff;
  padding: 10px 16px; border-radius: var(--r-2);
  z-index: 100;
}
.skip-link:focus { top: 12px; outline: none; box-shadow: var(--shadow-focus); }

.noscript-banner {
  background: var(--warn-bg); border: 1px solid var(--warn);
  color: var(--fg); padding: var(--sp-4) var(--sp-5);
  border-radius: var(--r-3); margin: var(--sp-4);
}

/* ========== Header ========== */
header {
  position: sticky; top: 0; z-index: 50;
  padding: 16px 32px;
  background: rgba(251,251,253,0.85);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border-block-end: 1px solid var(--border-soft);
}
.header-row {
  max-width: 1400px; margin: 0 auto;
  display: flex; justify-content: space-between; align-items: center;
  gap: var(--sp-4);
}
.brand {
  display: inline-flex; align-items: center; gap: 10px;
  color: var(--fg-strong); font-weight: 700; font-size: 1.05rem;
  font-family: var(--font-display); letter-spacing: -0.01em;
  text-decoration: none;
}
.brand:hover { text-decoration: none; }
.brand-logo {
  width: 28px; height: 28px;
  background: linear-gradient(135deg, var(--indigo), var(--pink));
  border-radius: var(--r-1); display: inline-block;
  box-shadow: var(--shadow-1);
}
/* Brand-Tag — identisch zu /tools/exif/ */
.brand-tag {
  font-size: 0.78rem;
  font-weight: 500;
  color: var(--ok);
  background: var(--ok-bg);
  padding: 3px 10px;
  border-radius: 999px;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.brand-tag::before {
  content: '';
  width: 6px; height: 6px;
  background: var(--ok);
  border-radius: 50%;
}
.header-tools {
  display: flex; align-items: center; gap: var(--sp-3);
}

/* Skill switch (Beginner / Pro) — identisch zu /tools/exif/ */
.skill-switch {
  position: relative;
  display: inline-flex;
  background: var(--indigo-soft);
  border: 1.5px solid rgba(99,91,255,0.22);
  border-radius: 999px;
  padding: 4px;
  box-shadow: 0 1px 2px rgba(99,91,255,0.10);
  height: 40px;
  align-items: center;
  box-sizing: border-box;
}
.skill-switch button {
  position: relative;
  z-index: 2;
  border: 0;
  background: transparent;
  color: var(--indigo-text);
  min-height: 36px;
  padding: 7px 18px;
  border-radius: 999px;
  font-size: 0.84rem;
  font-weight: 600;
  cursor: pointer;
  transition: color .25s var(--ease);
  font-family: inherit;
  letter-spacing: -0.005em;
}
.skill-switch button[aria-pressed="true"] {
  color: #fff;
  font-weight: 700;
  text-shadow: 0 1px 1px rgba(0,0,0,0.12);
}
.skill-switch button:hover:not([aria-pressed="true"]) { color: var(--indigo-deep); }
.skill-switch::before {
  content: '';
  position: absolute;
  z-index: 1;
  top: 4px; bottom: 4px;
  left: var(--skill-ind-left, 4px);
  width: var(--skill-ind-width, calc(50% - 4px));
  background: linear-gradient(120deg, var(--indigo) 0%, var(--pink) 100%);
  border-radius: 999px;
  box-shadow: 0 2px 8px rgba(99,91,255,0.35), 0 4px 14px rgba(255,56,92,0.20);
  transition: left .35s var(--ease), width .35s var(--ease);
}

/* Lang select — identisch zu /tools/exif/ */
.lang-switch select {
  background: var(--surface);
  color: var(--fg);
  border: 0;
  border-radius: 999px;
  padding: 8px 30px 8px 14px;
  font-size: 0.84rem;
  font-weight: 500;
  cursor: pointer;
  appearance: none;
  -webkit-appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6' viewBox='0 0 10 6'%3E%3Cpath fill='none' stroke='%236e6e73' stroke-width='1.6' stroke-linecap='round' stroke-linejoin='round' d='M1 1l4 4 4-4'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 11px center;
  background-size: 10px;
  box-shadow: 0 1px 2px rgba(0,0,0,0.06);
  transition: box-shadow .15s;
}
.lang-switch select:hover { box-shadow: 0 2px 8px rgba(0,0,0,0.10); }
.lang-switch select:focus { outline: none; box-shadow: var(--shadow-focus); }

/* ========== Layout ========== */
main {
  max-width: 1400px; margin: 0 auto;
  padding: 0 32px;
}

/* ========== Hero ========== */
.hero {
  position: relative; padding: var(--sp-9) 0 var(--sp-7);
  text-align: center; overflow: hidden;
}
.hero::before {
  content: ''; position: absolute;
  top: -200px; left: 50%; transform: translateX(-50%);
  width: 1400px; height: 700px; max-width: 100vw;
  background:
    radial-gradient(ellipse 60% 50% at 25% 30%, rgba(99,91,255,0.16), transparent 60%),
    radial-gradient(ellipse 50% 45% at 75% 40%, rgba(255,56,92,0.12), transparent 60%),
    radial-gradient(ellipse 55% 50% at 50% 80%, rgba(0,200,180,0.10), transparent 60%);
  pointer-events: none; z-index: 0; filter: blur(40px);
}
.hero > * { position: relative; z-index: 1; }
/* Hero-Eyebrow — identisch zu /tools/exif/ */
.hero-eyebrow {
  position: relative;
  z-index: 1;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  justify-content: center;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 6px 16px 6px 8px;
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--fg-muted);
  margin-block-end: var(--sp-6);
  box-shadow: var(--shadow-1);
  max-width: calc(100% - 32px);
  text-align: center;
}
.hero-eyebrow .badge {
  background: var(--ok-bg);
  color: var(--ok);
  padding: 2px 9px;
  border-radius: 999px;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.02em;
}
.hero-title {
  font-family: var(--font-display); font-weight: 700;
  font-size: clamp(2.4rem, 6vw, 4rem); line-height: 1.05;
  letter-spacing: -0.04em;
  color: var(--fg-strong);
  margin-block-end: var(--sp-5);
}
.hero-title .accent {
  background: linear-gradient(135deg, var(--indigo), var(--pink));
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent;
}
.hero-sub {
  font-size: clamp(1rem, 1.5vw, 1.2rem);
  color: var(--fg-muted); max-width: 640px; margin: 0 auto var(--sp-6);
}
/* Trust-Bar — identisch zu /tools/exif/ */
.trust-bar {
  position: relative;
  z-index: 1;
  display: flex;
  justify-content: center;
  gap: var(--sp-7);
  flex-wrap: wrap;
  margin-block-start: var(--sp-6);
  font-size: 0.92rem;
  color: var(--fg-muted);
}
.trust-bar span {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-weight: 500;
}
.trust-bar span::before {
  content: '✓';
  color: var(--ok);
  font-weight: 700;
  width: 18px; height: 18px;
  background: var(--ok-bg);
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 0.78rem;
}

/* ========== Section beam ========== */
.section-beam {
  width: 100%; height: 1px; max-width: 880px; margin: 0 auto;
  background: linear-gradient(90deg,
    transparent 0%, rgba(99,91,255,0.25) 25%,
    rgba(255,56,92,0.25) 50%, rgba(20,164,123,0.25) 75%, transparent 100%);
}

/* ========== Buttons ========== */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  gap: 6px; height: 44px; padding: 0 22px;
  border: 1px solid transparent; border-radius: var(--r-1);
  font-size: 0.95rem; font-weight: 600; cursor: pointer;
  transition: transform 0.1s var(--ease), background 0.15s, box-shadow 0.15s;
  text-decoration: none; white-space: nowrap;
}
.btn:focus-visible { outline: none; box-shadow: var(--shadow-focus); }
.btn:disabled, .btn[disabled] { opacity: 0.4; cursor: not-allowed; }
.btn-primary {
  background: var(--fg-strong); color: #fff;
}
.btn-primary:hover { background: #000; transform: translateY(-1px); }
.btn-primary:active { transform: translateY(0); }
.btn-secondary {
  background: #fff; color: var(--fg-strong);
  border-color: var(--border-strong);
}
.btn-secondary:hover { background: var(--surface-soft); }
.btn-ghost {
  background: transparent; color: var(--fg-muted);
}
.btn-ghost:hover { background: var(--surface-soft); color: var(--fg-strong); }
.btn-small { height: 36px; padding: 0 14px; font-size: 0.86rem; }
@media (hover: none), (pointer: coarse) {
  .btn-small { min-height: 44px; padding-inline: 16px; }
}
.btn-icon {
  display: inline-flex; align-items: center; justify-content: center;
  width: 36px; height: 36px; min-width: 36px;
  border: 1px solid var(--border); background: #fff;
  border-radius: var(--r-1); color: var(--fg-muted);
  text-decoration: none; cursor: pointer; transition: background 0.15s;
}
.btn-icon:hover { background: var(--surface-soft); color: var(--fg-strong); text-decoration: none; }
@media (hover: none), (pointer: coarse) {
  .btn-icon { width: 44px; height: 44px; min-width: 44px; }
}

/* ========== Tool ========== */
.tool {
  padding: var(--sp-7) 0 var(--sp-9);
}

/* URL bar */
.url-bar {
  display: flex; gap: var(--sp-3);
  background: #fff; border: 1px solid var(--border);
  border-radius: var(--r-3); padding: var(--sp-3);
  box-shadow: var(--shadow-1);
  max-width: 800px; margin: 0 auto var(--sp-3);
}
.url-input {
  flex: 1; min-width: 0;
  border: 0; padding: 0 var(--sp-3); font-size: 1rem;
  color: var(--fg-strong); background: transparent;
}
.url-input:focus { outline: none; }
/* Test-Button — Gradient + Glow wie Logo und Skill-Switch-Indikator.
 * Indigo→Pink-Verlauf (135deg) plus zwei-farbiger weicher Shadow.
 * Visual-Anker für die Haupt-Aktion auf der Seite. */
.btn-test {
  min-width: 110px;
  background: linear-gradient(135deg, var(--indigo), var(--pink));
  color: #fff;
  border: 0;
  box-shadow: 0 2px 8px rgba(99,91,255,0.35), 0 4px 14px rgba(255,56,92,0.20);
  transition: transform 0.1s var(--ease), box-shadow 0.18s var(--ease), filter 0.15s;
}
.btn-test:hover {
  background: linear-gradient(135deg, var(--indigo), var(--pink));
  filter: brightness(1.08);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(99,91,255,0.45), 0 8px 22px rgba(255,56,92,0.28);
}
.btn-test:active {
  transform: translateY(0);
  filter: brightness(0.95);
  box-shadow: 0 2px 6px rgba(99,91,255,0.30), 0 3px 10px rgba(255,56,92,0.18);
}
.btn-test:focus-visible {
  outline: none;
  box-shadow: var(--shadow-focus), 0 4px 14px rgba(255,56,92,0.20);
}
.url-hint {
  text-align: center; font-size: 0.86rem;
  color: var(--fg-subtle);
  max-width: 800px; margin: 0 auto var(--sp-6);
  line-height: 1.5;
}

/* Beginner: device tiles */
.device-tiles {
  display: grid; grid-template-columns: repeat(4, 1fr);
  gap: var(--sp-3); max-width: 900px; margin: 0 auto var(--sp-6);
}
.device-tile {
  display: flex; flex-direction: column; align-items: center; gap: 6px;
  padding: var(--sp-5) var(--sp-4); background: #fff;
  border: 1.5px solid var(--border); border-radius: var(--r-3);
  cursor: pointer; transition: border-color 0.15s, transform 0.1s, box-shadow 0.15s;
  min-height: 124px;
}
.device-tile:hover {
  border-color: var(--indigo);
  transform: translateY(-2px);
  box-shadow: var(--shadow-card);
}
.device-tile[aria-pressed="true"] {
  border-color: var(--indigo);
  background: var(--indigo-soft);
  box-shadow: 0 0 0 3px rgba(99,91,255,0.15);
}
/* Icon-Box mit Brand-Gradient — identisch zu .audience-icon in /tools/exif/.
 * 48×48 Quadrat mit abgerundeten Ecken, Indigo→Pink (oder Variante) Verlauf,
 * weißem SVG-Icon, weichem mehrlagigem Drop-Shadow. Beim Tile-Hover dezente
 * Scale + Rotation für Tactile-Feedback. */
.device-tile .device-icon {
  width: 48px;
  height: 48px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--r-2);
  background: var(--grad, linear-gradient(135deg, var(--indigo) 0%, var(--pink) 100%));
  color: #fff;
  margin-block-end: var(--sp-3);
  box-shadow: 0 6px 16px rgba(99,91,255,0.22), 0 1px 2px rgba(0,0,0,0.04);
  transition: transform .3s var(--ease), box-shadow .3s var(--ease);
}
.device-tile:hover .device-icon {
  transform: scale(1.05) rotate(-2deg);
  box-shadow: 0 10px 24px rgba(99,91,255,0.32), 0 2px 4px rgba(0,0,0,0.06);
}
.device-tile .device-icon svg {
  width: 24px;
  height: 24px;
  display: block;
}

/* Pro-Tile-Gradient-Varianten — gleiche Palette wie /tools/exif/ Audience-Icons.
 * Phone (g1): Indigo→Pink — Brand-Default.
 * Tablet (g2): Green→Indigo — frisch, "Lese"-assoziiert.
 * Laptop (g4): Indigo→Green — "produktiv".
 * Desktop (g6): Pink→Indigo — "kraftvoll". */
.device-tile[data-grad="g1"] { --grad: linear-gradient(135deg, #635bff 0%, #ff385c 100%); }
.device-tile[data-grad="g2"] { --grad: linear-gradient(135deg, #14a47b 0%, #635bff 100%); }
.device-tile[data-grad="g2"] .device-icon { box-shadow: 0 6px 16px rgba(20,164,123,0.24), 0 1px 2px rgba(0,0,0,0.04); }
.device-tile[data-grad="g2"]:hover .device-icon { box-shadow: 0 10px 24px rgba(20,164,123,0.36), 0 2px 4px rgba(0,0,0,0.06); }
/* Desktop: warmer Orange→Pink-Verlauf — kraftvolle Anmutung,
 * passt zum "größten/boldesten" Gerät der Reihe. */
.device-tile[data-grad="g5"] { --grad: linear-gradient(135deg, #ff8a00 0%, #ff385c 100%); }
.device-tile[data-grad="g5"] .device-icon { box-shadow: 0 6px 16px rgba(255,138,0,0.26), 0 1px 2px rgba(0,0,0,0.04); }
.device-tile[data-grad="g5"]:hover .device-icon { box-shadow: 0 10px 24px rgba(255,138,0,0.36), 0 2px 4px rgba(0,0,0,0.06); }
/* Laptop: Pink→Indigo — eigener "violetter" Look, deutlich abgesetzt
 * von Phone (Indigo→Pink), Tablet (Green→Indigo) und Desktop (Orange→Pink). */
.device-tile[data-grad="g6"] { --grad: linear-gradient(135deg, #ff385c 0%, #635bff 100%); }
.device-tile[data-grad="g6"] .device-icon { box-shadow: 0 6px 16px rgba(255,56,92,0.22), 0 1px 2px rgba(0,0,0,0.04); }
.device-tile[data-grad="g6"]:hover .device-icon { box-shadow: 0 10px 24px rgba(255,56,92,0.32), 0 2px 4px rgba(0,0,0,0.06); }
.device-tile strong {
  font-size: 1rem; color: var(--fg-strong); font-weight: 600;
}
.device-tile .device-spec {
  font-size: 0.78rem; color: var(--fg-muted);
}

/* Pro mode panel */
.device-pro {
  background: var(--surface-soft);
  border: 1px solid var(--border-soft);
  border-radius: var(--r-3);
  padding: var(--sp-4) var(--sp-5);
  margin-block-end: var(--sp-6);
  display: flex; flex-direction: column; gap: var(--sp-3);
}
.pro-row {
  display: flex; flex-wrap: wrap; align-items: center; gap: var(--sp-3);
}
.pro-label {
  font-size: 0.88rem; font-weight: 600; color: var(--fg-strong);
  min-width: 110px;
}
.pro-select, .pro-input {
  border: 1px solid var(--border); background: #fff;
  padding: 8px 12px; border-radius: var(--r-1);
  font-size: 0.92rem; color: var(--fg);
  height: 38px;
}
.pro-select { min-width: 240px; }
.pro-input-small { width: 110px; }
.pro-x { color: var(--fg-muted); font-weight: 600; }
.pro-toggles {
  border-top: 1px solid var(--border-soft); padding-top: var(--sp-3);
  gap: var(--sp-5);
}
.pro-toggle {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 0.88rem; color: var(--fg); cursor: pointer;
}
.pro-toggle input { accent-color: var(--indigo); width: 16px; height: 16px; }

/* Viewport area — kein eigener Scroll mehr, weil iframe-Skalierung
 * (siehe JS) zu breite Viewports auf den verfügbaren Platz herunter-
 * skaliert. Inhalt bleibt zentriert + komplett sichtbar. */
.viewport-area {
  position: relative;
  width: 100%;
  max-width: 100%;
  /* Wenn leer: kollabiert auf 0 Höhe — kein leerer Streifen unter dem
   * Geräte-Picker. Sobald Viewports da sind, wachst die Area mit. */
}
.viewport-area:not(:empty) {
  min-height: 400px;
  padding-block: var(--sp-3);
}
/* (Empty-State wurde entfernt — viewport-area kollabiert auf 0 Höhe wenn leer.) */

/* Viewport-grid: zentriert. Viewports die größer als der verfügbare Platz
 * sind, werden via JS-Transform skaliert — KEIN Horizontal-Scroll nötig,
 * KEIN Clipping links/rechts. */
.viewport-grid {
  display: flex; flex-wrap: wrap;
  gap: var(--sp-4);
  justify-content: center;
}

/* Viewport-wrap: outer container that holds the .viewport + the floating
 * remove-X. The X sits ENTIRELY outside the preview's top-right corner —
 * full button + small gap above and right of the device frame, so it
 * never overlaps the rendered page. */
.viewport-wrap {
  position: relative;
  display: inline-block;
  flex-shrink: 0;
  /* 30px padding-top/right gibt dem 26px Remove-Button vollen Platz
   * außerhalb des .viewport (4px Luft als visuelle Trennung). */
  padding: 30px 30px 0 0;
}
.viewport-remove {
  position: absolute;
  top: 0;
  inset-inline-end: 0;
  width: 26px; height: 26px;
  border-radius: 50%;
  border: 2px solid #fff;
  background: rgba(0,0,0,0.65);
  color: #fff;
  font-size: 1.1rem;
  font-weight: 700;
  line-height: 1;
  cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  padding: 0;
  z-index: 3;
  opacity: 0.92;
  box-shadow: 0 2px 6px rgba(0,0,0,0.25);
  transition: opacity .12s, background .12s, transform .12s;
}
.viewport-wrap:hover .viewport-remove { opacity: 1; }
.viewport-remove:hover {
  background: var(--pink, #ff385c);
  transform: scale(1.12);
  opacity: 1;
}
.viewport-remove:focus-visible {
  outline: none;
  box-shadow: 0 0 0 2px #fff, 0 0 0 4px var(--indigo);
  opacity: 1;
}
@media (hover: none) {
  .viewport-remove { opacity: 0.92; width: 32px; height: 32px; font-size: 1.3rem; }
}

/* Single viewport card */
.viewport {
  background: #fff; border: 1px solid var(--border);
  border-radius: var(--r-2);
  box-shadow: var(--shadow-1);
  overflow: hidden;
  flex-shrink: 0;
  display: flex; flex-direction: column;
  position: relative;
}
.viewport-header {
  display: flex; align-items: center; gap: var(--sp-2);
  padding: 8px 12px; background: var(--surface-soft);
  border-block-end: 1px solid var(--border-soft);
  font-size: 0.84rem;
}
.viewport-name { font-weight: 600; color: var(--fg-strong); }
.viewport-dim { color: var(--fg-muted); font-family: var(--font-mono); font-size: 0.78rem; }
.viewport-actions {
  margin-left: auto; display: flex; gap: 4px;
}
.viewport-action {
  width: 28px; height: 28px; border-radius: var(--r-1);
  background: transparent; border: 0; color: var(--fg-muted);
  cursor: pointer; font-size: 0.94rem;
  display: inline-flex; align-items: center; justify-content: center;
  transition: background 0.15s, color 0.15s;
}
.viewport-action:hover { background: rgba(0,0,0,0.06); color: var(--fg-strong); }
.viewport-frame-wrap {
  position: relative; background: var(--surface-soft);
}
.viewport-iframe {
  display: block; border: 0;
  background: #fff;
}

/* ──────────────────────────────────────────────────────────────────────
 *  Device-frame styling — TWO variants depending on viewport category
 *  ──────────────────────────────────────────────────────────────────────
 *  .frame-phone   → dark phone-bezel (Phone + Tablet)
 *                   Looks like an iPhone / iPad: dark border, rounded
 *                   corners, header bar with name + actions inside the
 *                   bezel.
 *  .frame-browser → light macOS/Chrome window chrome (Laptop + Desktop)
 *                   Looks like a real browser window: light grey title bar
 *                   with traffic-light dots and URL bar, no thick bezel.
 *                   At desktop sizes a thick dark frame just looks weird
 *                   and the user reads it as "clipped" — the browser-
 *                   chrome style matches their mental model.
 *  Footer (under the iframe) carries name + dimensions in BOTH variants
 *  so the user always sees what they're looking at.
 *  ──────────────────────────────────────────────────────────────────── */

/* === Variant 1: Phone-bezel (.frame-phone) ===
 * Frame-Styling auf .viewport-inner, NICHT auf .viewport selbst — sonst
 * würde die fullW-breite .viewport-inner doppelt-gepaddet aus dem
 * .viewport-Content-Box rausragen und der Reload-Button rechts wäre
 * unsichtbar. .viewport ist hier nur Layout-Wrapper. */
.viewport.frame-phone {
  border-radius: 28px;
  background: #1d1d1f;
  border: 0;
}
.viewport.frame-phone .viewport-inner {
  padding: 14px;
  box-sizing: border-box;
}
.viewport.frame-phone .viewport-header {
  background: transparent;
  color: #fff;
  border-block-end: 1px solid rgba(255,255,255,0.1);
  margin: -14px -14px 8px;
  padding: 10px 14px;
  border-radius: 28px 28px 0 0;
}
.viewport.frame-phone .viewport-name { color: #fff; }
.viewport.frame-phone .viewport-dim { color: rgba(255,255,255,0.6); }
.viewport.frame-phone .viewport-action { color: rgba(255,255,255,0.7); }
.viewport.frame-phone .viewport-action:hover { background: rgba(255,255,255,0.1); color: #fff; }
.viewport.frame-phone .viewport-frame-wrap { border-radius: var(--r-3); overflow: hidden; }
.viewport.frame-phone .viewport-iframe { border-radius: var(--r-3); }
.viewport.frame-phone .viewport-footer { display: none; } /* name+dim are in header already */

/* === Variant 2: Browser-chrome (.frame-browser) === */
.viewport.frame-browser {
  border: 1px solid var(--border-strong);
  border-radius: var(--r-2) var(--r-2) 6px 6px;
  background: #fff;
  box-shadow: var(--shadow-2);
  padding: 0;
  overflow: hidden;
}
.viewport.frame-browser .viewport-header {
  background: linear-gradient(180deg, #f3f3f4 0%, #e8e8ec 100%);
  border-block-end: 1px solid var(--border-strong);
  padding: 8px 12px;
  display: flex; align-items: center; gap: 12px;
  font-size: 0.84rem;
  margin: 0;
}
.browser-dots {
  display: inline-flex; gap: 6px; align-items: center;
  flex-shrink: 0;
}
.browser-dot {
  width: 12px; height: 12px; border-radius: 50%;
  display: inline-block;
}
.browser-dot.dot-r { background: #ff5f56; box-shadow: 0 0 0 0.5px rgba(0,0,0,0.06); }
.browser-dot.dot-y { background: #ffbd2e; box-shadow: 0 0 0 0.5px rgba(0,0,0,0.06); }
.browser-dot.dot-g { background: #27c93f; box-shadow: 0 0 0 0.5px rgba(0,0,0,0.06); }

/* Browser-Nav-Gruppe: ‹ › ⟳ — kompakte Buttons im macOS-Safari-Stil */
.browser-nav-group {
  display: inline-flex; align-items: center; gap: 2px;
  flex-shrink: 0;
}
.viewport.frame-browser .viewport-action.browser-nav {
  width: 24px; height: 24px;
  font-size: 1.05rem; font-weight: 500;
  color: var(--fg-muted);
  border-radius: 4px;
}
.viewport.frame-browser .viewport-action.browser-nav:hover {
  background: rgba(0,0,0,0.08);
  color: var(--fg-strong);
}
.viewport.frame-browser .viewport-action.browser-nav:active {
  background: rgba(0,0,0,0.14);
}
/* Reload-Symbol etwas heavier, sieht wie echtes Browser-Reload aus */
.viewport.frame-browser .viewport-action[data-action="reload"] {
  font-size: 1.0rem;
  font-weight: 600;
}
.browser-urlbar {
  /* Symmetrisches Layout — Rechts vom URL-Feld bleibt EXAKT so viel Platz
   * frei wie die Controls auf der linken Seite einnehmen:
   *   3 Dots (48px) + Gap (12) + Nav-Group (76px) + Gap (12) = 148px
   * Visuell ist die URL-Bar damit zentriert zwischen Steuerelementen und
   * dem gespiegelten leeren Pseudo-Bereich rechts. */
  flex: 1 1 auto; min-width: 0;
  margin-inline-end: 148px;
  background: #fff; border: 1px solid var(--border);
  border-radius: 6px; padding: 5px 12px;
  font-family: var(--font-mono); font-size: 0.78rem;
  color: var(--fg-muted);
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
  user-select: text;
}
/* URL-Bar als <input>: Browser-typisches Editieren direkt im Pseudo-Chrome.
 * Wir entfernen die default-Outline und setzen Focus-Styling konsistent zur
 * Stripe-Tonalität (indigo Focus-Ring). Cursor + Text-Color wechseln auf
 * Edit-Mode wenn fokussiert. */
input.browser-urlbar {
  outline: none;
  height: auto;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  cursor: text;
  -webkit-appearance: none; appearance: none;
  width: 100%;
}
input.browser-urlbar:hover {
  border-color: var(--border-strong);
  color: var(--fg);
}
input.browser-urlbar:focus {
  border-color: var(--indigo);
  color: var(--fg);
  background: #fff;
  box-shadow: 0 0 0 3px rgba(99,91,255,0.15);
}
input.browser-urlbar::placeholder { color: var(--fg-faint); }
.viewport.frame-browser .viewport-action {
  color: var(--fg-muted); width: 26px; height: 26px;
}
.viewport.frame-browser .viewport-action:hover {
  background: rgba(0,0,0,0.06); color: var(--fg-strong);
}
.viewport.frame-browser .viewport-frame-wrap {
  background: #fff;
}
.viewport.frame-browser .viewport-footer {
  display: flex; align-items: center; gap: 10px;
  /* Symmetrisches vertikales Padding — gleich viel Luft oben wie unten,
   * damit der Geräte-Name optisch zentriert in der Footer-Bar sitzt. */
  padding: 14px 14px;
  background: #f8f8f9;
  border-top: 1px solid var(--border-soft);
  font-size: 0.78rem;
}
.viewport.frame-browser .viewport-name {
  font-weight: 600; color: var(--fg-strong);
}
.viewport.frame-browser .viewport-dim {
  font-family: var(--font-mono); color: var(--fg-muted);
}

/* No-frame variant: footer hidden — header carries everything */
.viewport:not(.has-frame) .viewport-footer { display: none; }

/* Loading-Spinner während iframe lädt — verschwindet beim load-Event.
 * Sitzt absolut zentriert auf dem viewport-frame-wrap, damit der User
 * weiß dass etwas passiert. */
.viewport-loading {
  position: absolute; inset: 0;
  display: flex; align-items: center; justify-content: center;
  background: var(--surface-soft);
  z-index: 1;
  transition: opacity 0.2s var(--ease);
}
.viewport-loading.hidden { opacity: 0; pointer-events: none; }
.viewport-loading-spinner {
  width: 36px; height: 36px;
  border: 3px solid rgba(99,91,255,0.2);
  border-top-color: var(--indigo);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }
@media (prefers-reduced-motion: reduce) {
  .viewport-loading-spinner { animation: none; border-top-color: var(--indigo); }
}

/* Iframe blocked banner */
.viewport-blocked {
  position: absolute; inset: 0;
  display: none;
  flex-direction: column; align-items: center; justify-content: center;
  background: var(--surface-soft);
  padding: var(--sp-5);
  text-align: center;
}
.viewport-blocked.visible { display: flex; }
.viewport-blocked-icon { font-size: 2.5rem; margin-block-end: var(--sp-3); opacity: 0.5; }
.viewport-blocked-title {
  font-size: 1.05rem; font-weight: 600; color: var(--fg-strong);
  margin-block-end: var(--sp-2);
}
.viewport-blocked-text {
  font-size: 0.86rem; color: var(--fg-muted);
  max-width: 320px; margin: 0 auto var(--sp-3);
  line-height: 1.5;
}

/* Breakpoint ruler overlay */
.viewport-ruler {
  position: absolute; left: 0; right: 0; bottom: 0;
  height: 18px;
  background: linear-gradient(90deg, rgba(99,91,255,0.04), transparent);
  font-family: var(--font-mono); font-size: 0.66rem;
  color: var(--indigo-deep); pointer-events: none;
  display: flex; align-items: center;
  z-index: 2;
}
.viewport-ruler-mark {
  position: absolute; bottom: 0;
  height: 12px; width: 1px;
  background: rgba(99,91,255,0.4);
}
.viewport-ruler-mark::before {
  content: attr(data-px) 'px';
  position: absolute; left: 4px; bottom: 0;
  font-family: var(--font-mono); font-size: 0.66rem;
  color: rgba(99,91,255,0.7);
  white-space: nowrap;
}

/* ========== How section ========== */
.how {
  padding: var(--sp-9) 0;
  text-align: center;
}
.showcase-eyebrow {
  font-size: 0.9rem; font-weight: 600; color: var(--indigo);
  margin-block-end: var(--sp-3);
}
.showcase-eyebrow.centered { text-align: center; }
.showcase-title {
  font-family: var(--font-display); font-weight: 700;
  font-size: clamp(1.6rem, 3vw, 2.4rem); line-height: 1.15;
  letter-spacing: -0.025em; color: var(--fg-strong);
  margin-block-end: var(--sp-3);
}
.showcase-title.centered { text-align: center; }
.showcase-sub {
  font-size: 1.05rem; color: var(--fg-muted); line-height: 1.6;
}
.how-row {
  display: grid; grid-template-columns: repeat(3, 1fr);
  gap: var(--sp-6); margin-block-start: var(--sp-7);
  text-align: left;
}
.how-pillar {
  background: #fff; border: 1px solid var(--border-soft);
  border-radius: var(--r-3); padding: var(--sp-6);
  box-shadow: var(--shadow-1);
}
.how-num {
  width: 36px; height: 36px;
  background: linear-gradient(135deg, var(--indigo), var(--pink));
  color: #fff; border-radius: var(--r-1);
  display: inline-flex; align-items: center; justify-content: center;
  font-weight: 700; font-size: 1.05rem;
  margin-block-end: var(--sp-3);
}
.how-pillar h3 {
  font-family: var(--font-display); font-size: 1.15rem;
  color: var(--fg-strong); margin-block-end: var(--sp-2);
  letter-spacing: -0.01em;
}
.how-pillar p { color: var(--fg-muted); font-size: 0.94rem; }

/* ========== Showcase (privacy section) ========== */
.showcase {
  padding: var(--sp-9) 0;
  display: grid; grid-template-columns: 1fr 1fr;
  gap: var(--sp-9); align-items: center;
}
.showcase-flip .showcase-text { order: 2; }
.showcase-flip .showcase-visual { order: 1; }
.proof-list {
  display: flex; flex-direction: column; gap: var(--sp-3);
}
.proof-item {
  display: flex; gap: var(--sp-3);
  background: #fff; border: 1px solid var(--border-soft);
  border-radius: var(--r-2); padding: var(--sp-4);
  box-shadow: var(--shadow-1);
}
.proof-icon { font-size: 1.6rem; }
.proof-item strong {
  display: block; font-size: 1rem; color: var(--fg-strong);
  margin-block-end: 4px; font-weight: 600;
}
.proof-item span:not(.proof-icon) {
  font-size: 0.88rem; color: var(--fg-muted);
}

/* ========== Content / FAQ — identisch zu /tools/exif/ ========== */
.content-section { padding: var(--sp-9) 0; }
.content-card {
  background: transparent;
  border: 0;
  border-radius: 0;
  padding: 0;
  box-shadow: none;
  max-width: 880px;
  margin: 0 auto;
}
.content-card h2 {
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 3vw, 2.4rem);
  font-weight: 700;
  letter-spacing: -0.025em;
  line-height: 1.15;
  color: var(--fg-strong);
  margin-block-end: var(--sp-4);
}
.content-card p {
  color: var(--fg-muted);
  margin-block-end: var(--sp-3);
  line-height: 1.7;
  font-size: 1.04rem;
}
.content-card p strong { color: var(--fg-strong); font-weight: 600; }

.faq-list { width: 100%; }
.faq-list details {
  background: var(--surface);
  border-radius: var(--r-2);
  padding: var(--sp-4) var(--sp-5);
  margin-block-end: 8px;
  transition: box-shadow .15s;
  box-shadow: var(--shadow-card);
  /* Breite einfrieren: mit padding + box-sizing immer exakt 100% des Parents,
   * unabhängig von Open/Hover. Sonst wirken Boxen beim Aufklappen breiter. */
  width: 100%;
  box-sizing: border-box;
}
.faq-list details:hover { box-shadow: var(--shadow-card-hover, var(--shadow-2)); }
.faq-list details[open] { box-shadow: var(--shadow-card-hover, var(--shadow-2)); }
.faq-list summary {
  cursor: pointer;
  font-weight: 500;
  color: var(--fg-strong);
  list-style: none;
  font-size: 1rem;
}
.faq-list summary::-webkit-details-marker { display: none; }
.faq-list summary::before {
  content: '+';
  color: var(--indigo-text);
  font-weight: 700;
  margin-inline-end: 10px;
  font-size: 1.2em;
}
.faq-list details[open] summary::before { content: '−'; }
.faq-list p {
  margin-block-start: var(--sp-3);
  font-size: 0.94rem;
  line-height: 1.7;
}
.faq-list p code {
  background: var(--surface-soft); border-radius: 4px;
  padding: 1px 6px; font-size: 0.86em; font-family: var(--font-mono);
  color: var(--fg);
}

/* ========== Footer ========== */
footer {
  background: var(--surface-soft);
  padding: var(--sp-7) var(--sp-5);
  border-top: 1px solid var(--border-soft);
  text-align: center; margin-top: var(--sp-9);
  color: var(--fg-muted); font-size: 0.86rem;
}
footer p { margin-block-end: var(--sp-3); }
.footer-links {
  display: flex; flex-wrap: wrap; gap: var(--sp-2);
  justify-content: center; align-items: center;
}
.footer-sep { color: var(--fg-faint); }
.footer-lang-mobile {
  display: none; gap: var(--sp-2); align-items: center;
  margin-block-end: var(--sp-3);
  justify-content: center;
}

/* ========== Responsive ========== */
@media (max-width: 1024px) {
  .showcase { grid-template-columns: 1fr; gap: var(--sp-5); }
  .showcase-flip .showcase-text { order: 1; }
  .showcase-flip .showcase-visual { order: 2; }
}
@media (max-width: 880px) {
  .how-row { grid-template-columns: 1fr; gap: var(--sp-4); }
  main { padding: 0 20px; }
  header { padding: 14px 20px; }
}
@media (max-width: 720px) {
  header { position: relative; padding: 12px 16px; }
  .header-row { flex-wrap: wrap; gap: var(--sp-3); }
  .brand-tag { display: none; }
  .lang-switch { display: none; }
  .footer-lang-mobile { display: flex; }
  .skill-switch button { min-height: 44px; padding-block: 11px; }
  .url-bar { flex-direction: column; padding: var(--sp-3); }
  .url-input { padding: var(--sp-3); border: 1px solid var(--border-soft); border-radius: var(--r-1); }
  .btn-test { width: 100%; }
  .device-tiles { grid-template-columns: repeat(2, 1fr); }
  .device-tile { min-height: 110px; padding: var(--sp-4) var(--sp-3); }
  .device-tile .device-icon { font-size: 1.7rem; }
  .pro-label { min-width: 0; flex-basis: 100%; }
  .pro-select { min-width: 0; flex: 1; }
  .pro-input-small { flex: 1; width: auto; min-width: 80px; }
  .hero { padding: var(--sp-7) 0 var(--sp-6); }
  .content-card { padding: var(--sp-5); }
}
@media (max-width: 480px) {
  main { padding: 0 16px; }
  header { padding: 12px; }
  .device-tiles { grid-template-columns: 1fr 1fr; gap: var(--sp-2); }
  .device-tile { min-height: 90px; padding: var(--sp-3); }
  .device-tile .device-icon { font-size: 1.4rem; }
  .device-tile strong { font-size: 0.9rem; }
  .device-tile .device-spec { font-size: 0.72rem; }
  .trust-bar { gap: var(--sp-4); font-size: 0.84rem; }
  .pro-toggles { gap: var(--sp-3); }
  .pro-toggle { flex-basis: 100%; }
}

/* iOS Safe-Area */
@supports (padding: env(safe-area-inset-bottom)) {
  body { padding-bottom: env(safe-area-inset-bottom); }
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}

/* Toast for share-link copy etc. */
.toast {
  position: fixed; bottom: 24px; left: 50%;
  transform: translateX(-50%);
  background: var(--fg-strong); color: #fff;
  padding: 10px 18px; border-radius: var(--r-1);
  font-size: 0.88rem; font-weight: 600;
  box-shadow: var(--shadow-2);
  z-index: 100;
  animation: toastIn 0.25s var(--ease);
}
@keyframes toastIn {
  from { opacity: 0; transform: translate(-50%, 20px); }
  to { opacity: 1; transform: translate(-50%, 0); }
}

/* Skill-mode visibility — hide [data-advanced] in beginner mode, hide [data-beginner] in advanced */
body[data-skill-mode="beginner"] [data-advanced] { display: none !important; }
body[data-skill-mode="advanced"] [data-beginner] { display: none !important; }