/* ── 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;
}

/* ── Base & Layout ───────────────────────────────────────────────────────── */
body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  background: var(--imi-bg);
  color: #333;
  line-height: 1.6;
  font-size: 15px;
}
.container {
  max-width: 1000px;
  margin: 30px auto;
  padding: 0 20px;
}

/* ── 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; }

/* ── Content-Box ─────────────────────────────────────────────────────────── */
.content-box {
  background: #fff;
  border: 1px solid var(--imi-border);
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0 4px 12px rgba(0,0,0,.05);
  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; }

/* ── 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=date],
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: #333;
  transition: border .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);
}

/* ── 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; }
.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-sm { padding: 5px 10px; font-size: 12px; min-height: 32px; border-radius: 4px; }
.btn-row { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 18px; }

/* ── Grid-Helpers ────────────────────────────────────────────────────────── */
.grid2 { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }

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

/* --- Modus-Tabs --- */
.mode-tabs {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  margin-bottom: 20px;
  border-bottom: 2px solid var(--imi-border);
  padding-bottom: 10px;
}
.mode-tab {
  padding: 8px 18px;
  border: 2px solid var(--imi-border);
  border-radius: 6px 6px 0 0;
  background: #f8fafc;
  color: var(--imi-muted);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: all .2s;
  font-family: inherit;
  min-height: 40px;
}
.mode-tab:hover { background: var(--imi-light); color: var(--imi-navy); }
.mode-tab.active {
  background: var(--imi-navy);
  color: #fff;
  border-color: var(--imi-navy);
}
.mode-tab:focus-visible { outline: 3px solid var(--imi-teal); outline-offset: 2px; }

/* --- Mode Panels --- */
.mode-panel { display: none; }
.mode-panel.active { display: block; }

/* --- Visual Picker --- */
/* GEÄNDERT v1.3: Swatch mit Regenbogen-Hintergrund, 3D-Effekt + Info-Panel */

/* Layout: Swatch links, Info-Panel rechts */
.picker-row {
  display: flex;
  gap: 24px;
  align-items: stretch;
  flex-wrap: wrap;
}

.picker-swatch-wrap {
  flex: 0 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0;
}

/* Nativer Picker unsichtbar, aber zugänglich */
#nativePicker {
  position: absolute;
  width: 0; height: 0;
  opacity: 0;
  pointer-events: none;
}

/* Swatch: Regenbogen-Hintergrund + 3D-Prägung */
.color-swatch-large {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 8px;
  width: 180px;
  height: 140px;
  border-radius: 16px;
  /* Regenbogen-Rand als klarer Picker-Hinweis */
  background:
    linear-gradient(#fff 0%, #fff 100%) padding-box,
    conic-gradient(red, yellow, lime, cyan, blue, magenta, red) border-box;
  border: 4px solid transparent;
  /* 3D-Schatten */
  box-shadow:
    0 2px 0 #bbb,
    0 4px 0 #aaa,
    0 6px 0 #999,
    0 8px 16px rgba(0,0,0,.25);
  cursor: pointer;
  transition: box-shadow .15s, transform .15s;
  position: relative;
  overflow: hidden;
}
/* Farbige Innenfläche via Pseudo-Element */
.color-swatch-large::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: 12px;
  background: inherit;
  /* wird per JS via style.setProperty überschrieben */
  background: var(--swatch-color, #0b3c5d);
  z-index: 0;
}
.color-swatch-large:hover {
  transform: translateY(-3px);
  box-shadow:
    0 4px 0 #bbb,
    0 6px 0 #aaa,
    0 8px 0 #999,
    0 12px 24px rgba(0,0,0,.3);
}
.color-swatch-large:active {
  transform: translateY(2px);
  box-shadow:
    0 1px 0 #bbb,
    0 2px 8px rgba(0,0,0,.2);
}
.color-swatch-large:focus-visible {
  outline: 3px solid var(--imi-teal);
  outline-offset: 3px;
}
.swatch-icon {
  font-size: 28px;
  position: relative;
  z-index: 1;
  filter: drop-shadow(0 1px 2px rgba(0,0,0,.4));
}
.swatch-label {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .05em;
  text-transform: uppercase;
  color: #fff;
  text-shadow: 0 1px 3px rgba(0,0,0,.6);
  position: relative;
  z-index: 1;
}

/* Info-Panel rechts */
.picker-info-panel {
  flex: 1;
  min-width: 200px;
  background: #f8fafc;
  border: 1px solid var(--imi-border);
  border-radius: 10px;
  padding: 16px 20px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.picker-info-row {
  display: flex;
  align-items: center;
  gap: 10px;
}
.picker-info-row--contrast { gap: 8px; }
.picker-info-label {
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .06em;
  color: var(--imi-muted);
  min-width: 72px;
  margin: 0;
}
.picker-info-val {
  font-family: 'Courier New', monospace;
  font-size: 13px;
  color: #1a1a1a;
}
.picker-info-divider {
  border-top: 1px solid var(--imi-border);
  margin: 2px 0;
}
/* Leuchtdichte-Balken */
.picker-lum-bar-wrap {
  flex: 1;
  height: 8px;
  background: linear-gradient(to right, #000, #fff);
  border-radius: 4px;
  border: 1px solid var(--imi-border);
  position: relative;
  overflow: visible;
}
.picker-lum-bar {
  position: absolute;
  top: 50%;
  transform: translate(-50%, -50%);
  width: 14px;
  height: 14px;
  border-radius: 50%;
  border: 2px solid #fff;
  box-shadow: 0 0 0 1px #555;
  background: #555;
  transition: left .2s;
}
/* Kontrast-Chips */
.picker-contrast-chip {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 24px;
  border-radius: 5px;
  font-size: 11px;
  font-weight: 700;
  border: 1px solid rgba(0,0,0,.15);
  position: relative;
}
.picker-contrast-chip::after {
  content: attr(data-ratio);
  position: absolute;
  bottom: -18px;
  left: 50%;
  transform: translateX(-50%);
  font-size: 9px;
  font-weight: 700;
  white-space: nowrap;
  color: var(--imi-muted);
}

/* --- Image-to-Palette --- */
.drop-zone {
  border: 2px dashed var(--imi-border);
  border-radius: 10px;
  padding: 36px 24px;
  text-align: center;
  cursor: pointer;
  transition: border-color .2s, background .2s;
  background: #f8fafc;
  position: relative;
}
.drop-zone:hover,
.drop-zone.dragover {
  border-color: var(--imi-teal);
  background: var(--imi-light);
}
.drop-zone:focus-visible { outline: 3px solid var(--imi-teal); outline-offset: 2px; }
.drop-icon { font-size: 36px; margin-bottom: 10px; }
.drop-link { color: var(--imi-navy); font-weight: 700; text-decoration: underline; }
#imgFileInput {
  position: absolute; inset: 0; width: 100%; height: 100%;
  opacity: 0; cursor: pointer; z-index: 1;
}
#imgCanvas { display: none; }

.extracted-palette {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 16px;
}
.extracted-swatch {
  width: 60px;
  height: 60px;
  border-radius: 8px;
  border: 2px solid var(--imi-border);
  cursor: pointer;
  transition: transform .15s, box-shadow .15s;
  flex-shrink: 0;
}
.extracted-swatch:hover {
  transform: scale(1.1);
  box-shadow: 0 4px 12px rgba(0,0,0,.2);
}
.extracted-swatch:focus-visible { outline: 3px solid var(--imi-teal); outline-offset: 2px; }

/* --- Code Input --- */
.code-input-layout {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 12px;
  align-items: flex-end;
}
.error-msg {
  color: #c62828;
  font-size: 13px;
  margin-top: 8px;
  min-height: 20px;
}

/* --- Formats Grid --- */
.formats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 14px;
}
.format-card {
  background: #f8fafc;
  border: 1px solid var(--imi-border);
  border-radius: 8px;
  padding: 14px 16px;
}
.format-card-label {
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .08em;
  color: var(--imi-muted);
  margin-bottom: 6px;
}
.format-card-value {
  font-family: 'Courier New', monospace;
  font-size: 13px;
  color: #1a1a1a;
  word-break: break-all;
  line-height: 1.4;
  margin-bottom: 8px;
}
.copy-btn {
  background: none;
  border: 1px solid var(--imi-border);
  border-radius: 4px;
  padding: 3px 10px;
  font-size: 11px;
  cursor: pointer;
  color: var(--imi-navy);
  font-family: inherit;
  font-weight: 600;
  transition: all .15s;
  min-height: 26px;
}
.copy-btn:hover { background: var(--imi-navy); color: #fff; border-color: var(--imi-navy); }
.copy-btn:focus-visible { outline: 3px solid var(--imi-teal); outline-offset: 2px; }
.copy-btn.copied { background: var(--imi-teal); color: #fff; border-color: var(--imi-teal); }

/* --- Contrast Grid --- */
.contrast-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}
.contrast-card {
  border-radius: 10px;
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  border: 2px solid var(--imi-border);
}
.contrast-demo {
  border-radius: 6px;
  padding: 10px 14px;
  font-size: 15px;
  font-weight: 600;
  text-align: center;
}
.contrast-ratio {
  font-size: 28px;
  font-weight: 700;
  color: var(--imi-navy);
  text-align: center;
}
.contrast-badges {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  justify-content: center;
}
.badge {
  padding: 3px 10px;
  border-radius: 20px;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .05em;
}
.badge-pass { background: #e8f5e9; color: #2e7d32; border: 1px solid #a5d6a7; }
.badge-fail { background: #ffebee; color: #c62828; border: 1px solid #ef9a9a; }

/* --- Palette Section --- */
.palette-section { margin-bottom: 24px; }
.palette-section:last-child { margin-bottom: 0; }
.palette-section-title {
  font-size: 13px;
  font-weight: 700;
  color: var(--imi-muted);
  text-transform: uppercase;
  letter-spacing: .06em;
  margin-bottom: 12px;
}

/* --- Tint/Shade Strip --- */
.tint-shade-strip {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}
.ts-swatch {
  width: 52px;
  height: 52px;
  border-radius: 6px;
  border: 1px solid rgba(0,0,0,.1);
  cursor: pointer;
  transition: transform .15s, box-shadow .15s;
  position: relative;
  flex-shrink: 0;
}
.ts-swatch:hover {
  transform: scale(1.12);
  box-shadow: 0 4px 12px rgba(0,0,0,.2);
  z-index: 1;
}
.ts-swatch:focus-visible { outline: 3px solid var(--imi-teal); outline-offset: 2px; }
.ts-label {
  font-size: 9px;
  text-align: center;
  margin-top: 3px;
  color: var(--imi-muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 52px;
}

/* --- Harmony Tabs --- */
.harmony-tabs {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  margin-bottom: 14px;
}
.harmony-tab {
  padding: 6px 14px;
  border: 1px solid var(--imi-border);
  border-radius: 20px;
  background: #f8fafc;
  color: var(--imi-muted);
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  transition: all .2s;
  font-family: inherit;
  min-height: 32px;
}
.harmony-tab:hover { background: var(--imi-light); color: var(--imi-navy); }
.harmony-tab.active { background: var(--imi-teal); color: #fff; border-color: var(--imi-teal); }
.harmony-tab:focus-visible { outline: 3px solid var(--imi-teal); outline-offset: 2px; }

.harmony-strip {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  align-items: flex-end;
}
.harmony-swatch-wrap { text-align: center; }
.harmony-swatch {
  width: 72px;
  height: 72px;
  border-radius: 8px;
  border: 2px solid rgba(0,0,0,.08);
  cursor: pointer;
  display: block;
  transition: transform .15s, box-shadow .15s;
}
.harmony-swatch:hover {
  transform: scale(1.08);
  box-shadow: 0 4px 14px rgba(0,0,0,.2);
}
.harmony-swatch:focus-visible { outline: 3px solid var(--imi-teal); outline-offset: 2px; }
.harmony-hex {
  font-family: 'Courier New', monospace;
  font-size: 11px;
  color: var(--imi-muted);
  margin-top: 5px;
}
.harmony-name {
  font-size: 11px;
  color: var(--imi-muted);
  font-weight: 600;
}

/* Hint text */
.hint-text {
  font-size: 13px;
  color: var(--imi-muted);
  margin-bottom: 14px;
}

/* ── 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: 680px) {
  .box-body { padding: 16px; }
  .formats-grid { grid-template-columns: 1fr 1fr; }
  .contrast-grid { grid-template-columns: 1fr; }
  .code-input-layout { grid-template-columns: 1fr; }
  .picker-row { flex-direction: column; }
  .color-swatch-large { width: 100%; height: 110px; }
  .picker-info-panel { min-width: unset; }
  .ts-swatch { width: 44px; height: 44px; }
  .ts-label { max-width: 44px; }
  .harmony-swatch { width: 56px; height: 56px; }
}
@media (max-width: 400px) {
  .formats-grid { grid-template-columns: 1fr; }
  .mode-tabs { gap: 4px; }
  .mode-tab { padding: 7px 12px; font-size: 13px; }
}