:root {
  --accent: #4f46e5;
  --accent-hover: #4338ca;
  --accent-soft: #eef2ff;
  --bg: #f5f5f7;
  --surface: #ffffff;
  --surface-2: #f8fafc;
  --text: #1f2937;
  --text-muted: #6b7280;
  --border: #e5e7eb;
  --border-strong: #d1d5db;
  --success: #16a34a;
  --danger: #dc2626;
  --warning: #d97706;
  --shadow: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
  --radius: 8px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --accent: #818cf8;
    --accent-hover: #a5b4fc;
    --accent-soft: #1e1b4b;
    --bg: #0f172a;
    --surface: #1e293b;
    --surface-2: #334155;
    --text: #e2e8f0;
    --text-muted: #94a3b8;
    --border: #334155;
    --border-strong: #475569;
    --success: #4ade80;
    --danger: #f87171;
    --warning: #fbbf24;
    --shadow: 0 1px 3px rgba(0,0,0,0.4);
  }
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html, body {
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
  font-size: 15px;
}

a { color: var(--accent); text-decoration: none; }
a:hover { color: var(--accent-hover); }

.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 24px 20px 64px;
}

/* Topbar */
.topbar {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  box-shadow: var(--shadow);
}
.topbar-inner {
  max-width: 1280px;
  margin: 0 auto;
  padding: 14px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}
.topbar-title {
  font-size: 16px;
  font-weight: 600;
  color: var(--text);
}
.topbar-title a { color: inherit; }
.topbar-actions {
  display: flex;
  gap: 8px;
  align-items: center;
}

/* Headings */
h1 { font-size: 26px; font-weight: 600; margin-bottom: 18px; letter-spacing: -0.01em; }
h2 { font-size: 18px; font-weight: 600; margin-bottom: 12px; }
h3 { font-size: 15px; font-weight: 600; margin-bottom: 8px; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.04em; }

p { margin-bottom: 12px; }
.muted { color: var(--text-muted); }
.small { font-size: 13px; }

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 8px 16px;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius);
  background: var(--surface);
  color: var(--text);
  cursor: pointer;
  font-size: 14px;
  font-family: inherit;
  font-weight: 500;
  text-decoration: none;
  transition: background 0.15s, border-color 0.15s, transform 0.05s;
}
.btn:hover { background: var(--surface-2); border-color: var(--accent); color: var(--text); }
.btn:active { transform: translateY(1px); }
.btn-primary {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}
.btn-primary:hover { background: var(--accent-hover); border-color: var(--accent-hover); color: #fff; }
.btn-danger {
  background: var(--surface);
  color: var(--danger);
  border-color: var(--border-strong);
}
.btn-danger:hover { background: var(--danger); color: #fff; border-color: var(--danger); }
.btn-sm { padding: 4px 10px; font-size: 13px; }
.btn-link {
  border: none;
  background: transparent;
  color: var(--accent);
  padding: 4px 8px;
}
.btn-link:hover { background: var(--accent-soft); }

/* Forms */
.form-group { margin-bottom: 16px; }
.form-group label {
  display: block;
  margin-bottom: 6px;
  font-size: 13px;
  font-weight: 500;
  color: var(--text-muted);
}
input[type="text"],
input[type="password"],
input[type="number"],
input[type="date"],
input[type="datetime-local"],
textarea,
select {
  width: 100%;
  padding: 9px 12px;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius);
  background: var(--surface);
  color: var(--text);
  font-size: 14px;
  font-family: inherit;
}
input:focus, textarea:focus, select:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}
textarea { min-height: 70px; resize: vertical; }

.form-row {
  display: flex;
  gap: 16px;
}
.form-row > .form-group { flex: 1; }

.input-with-suffix {
  position: relative;
}
.input-with-suffix input {
  padding-right: 44px;
}
.input-with-suffix .suffix {
  position: absolute;
  right: 12px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  font-size: 13px;
  pointer-events: none;
}

.radio-group {
  display: flex;
  gap: 14px;
  align-items: center;
  flex-wrap: wrap;
}
.radio-group label {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin: 0;
  cursor: pointer;
  font-size: 14px;
  color: var(--text);
  font-weight: 400;
}

/* Cards */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 20px;
}
.card + .card { margin-top: 16px; }

/* Person-Liste (Karten) */
.person-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 16px;
}
.person-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 18px 20px;
  text-decoration: none;
  color: inherit;
  display: block;
  transition: transform 0.1s, box-shadow 0.15s, border-color 0.15s;
}
.person-card:hover {
  transform: translateY(-1px);
  border-color: var(--accent);
  box-shadow: 0 4px 12px rgba(0,0,0,0.07);
  color: inherit;
}
.person-card-name { font-size: 17px; font-weight: 600; margin-bottom: 2px; }
.person-card-meta { font-size: 13px; color: var(--text-muted); margin-bottom: 12px; }
.person-card-bf {
  font-size: 28px;
  font-weight: 600;
  letter-spacing: -0.02em;
}
.person-card-bf .unit { font-size: 17px; color: var(--text-muted); margin-left: 2px; }
.person-card-delta {
  display: inline-block;
  margin-left: 8px;
  font-size: 13px;
  font-weight: 500;
  padding: 2px 7px;
  border-radius: 999px;
  vertical-align: middle;
}
.delta-down { background: #dcfce7; color: #166534; }
.delta-up   { background: #fee2e2; color: #991b1b; }
.delta-flat { background: var(--surface-2); color: var(--text-muted); }
@media (prefers-color-scheme: dark) {
  .delta-down { background: #14532d; color: #bbf7d0; }
  .delta-up   { background: #7f1d1d; color: #fecaca; }
}
.person-card-kg { font-size: 13px; color: var(--text-muted); margin-top: 4px; font-variant-numeric: tabular-nums; }
.person-card-date { font-size: 12px; color: var(--text-muted); margin-top: 6px; }
.person-card-empty { font-size: 14px; color: var(--text-muted); }

/* Detail-Header */
.person-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 18px;
}
.person-header .meta { font-size: 14px; color: var(--text-muted); margin-top: 4px; }

.metric-block {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 0;
}
.metric-block > div { min-width: 0; text-align: center; }
.metric-big {
  font-size: 48px;
  font-weight: 600;
  letter-spacing: -0.02em;
  line-height: 1;
}
.metric-big .unit { font-size: 24px; color: var(--text-muted); margin-left: 4px; }
.metric-sub { font-size: 14px; color: var(--text-muted); }
.metric-block h3 {
  font-weight: 700;
  color: var(--text);
}
.metric-block .metric-sub {
  font-size: 30px;
  font-weight: 400;
  line-height: 1.05;
  letter-spacing: -0.01em;
  color: var(--text-muted);
}

.badge {
  display: inline-block;
  font-size: 12px;
  padding: 3px 10px;
  border-radius: 999px;
  font-weight: 500;
}
.badge-warning { background: #fef3c7; color: #92400e; }
@media (prefers-color-scheme: dark) {
  .badge-warning { background: #78350f; color: #fde68a; }
}

/* Tables */
table {
  width: 100%;
  border-collapse: collapse;
  background: var(--surface);
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border);
}
th, td {
  padding: 10px 12px;
  text-align: left;
  border-bottom: 1px solid var(--border);
  font-size: 14px;
}
th {
  background: var(--surface-2);
  font-weight: 600;
  font-size: 12px;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
tbody tr:last-child td { border-bottom: none; }
tbody tr:hover { background: var(--surface-2); }
td.actions, th.actions { text-align: right; white-space: nowrap; }
td.num, th.num { text-align: right; font-variant-numeric: tabular-nums; white-space: nowrap; }
table td:first-child { white-space: nowrap; }

/* Messungen-Tabelle: alle Spalten zentriert (Überschrift über Wert). */
#measurements-table th,
#measurements-table td { text-align: center; }

/* Messages */
.msg {
  padding: 10px 14px;
  border-radius: var(--radius);
  font-size: 14px;
  margin-bottom: 14px;
  border: 1px solid transparent;
}
.msg-error {
  background: #fee2e2;
  color: #991b1b;
  border-color: #fecaca;
}
.msg-success {
  background: #dcfce7;
  color: #166534;
  border-color: #bbf7d0;
}
.msg-info {
  background: var(--accent-soft);
  color: var(--accent);
  border-color: var(--border);
}
@media (prefers-color-scheme: dark) {
  .msg-error { background: #7f1d1d; color: #fecaca; border-color: #991b1b; }
  .msg-success { background: #14532d; color: #bbf7d0; border-color: #166534; }
}

/* Login */
.login-page {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  padding: 20px;
}
.login-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 32px;
  width: 100%;
  max-width: 380px;
}
.login-title {
  text-align: center;
  margin-bottom: 22px;
  font-size: 20px;
  font-weight: 600;
}

/* Empty-State */
.empty-state {
  text-align: center;
  padding: 40px 20px;
  color: var(--text-muted);
}
.empty-state h2 { color: var(--text); margin-bottom: 8px; }

/* Hint-Box */
.hint {
  background: var(--accent-soft);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 12px 16px;
  font-size: 13px;
  color: var(--text);
  margin-bottom: 16px;
}

/* Preview-Anzeige */
.preview {
  background: var(--surface-2);
  border: 1px dashed var(--border-strong);
  border-radius: var(--radius);
  padding: 14px 16px;
  margin-top: 14px;
  font-size: 14px;
}
.preview strong {
  font-size: 22px;
  font-weight: 600;
  color: var(--accent);
  margin-left: 6px;
}

/* Chart */
.chart-wrapper {
  position: relative;
  height: 320px;
  margin: 16px 0 12px;
}

/* Formel-Overlay an Diagramm-Überschriften */
.info-pop {
  position: relative;
  display: inline-block;
  margin-left: 10px;
  font-size: 13px;
  font-weight: 400;
  text-transform: none;
  letter-spacing: 0;
  vertical-align: middle;
}
.info-pop-trigger {
  color: var(--accent);
  cursor: help;
  border-bottom: 1px dotted currentColor;
  padding-bottom: 1px;
  user-select: none;
}
.info-pop-content {
  display: none;
  position: absolute;
  top: calc(100% + 6px);
  left: 0;
  width: 460px;
  max-width: calc(100vw - 48px);
  background: var(--surface);
  color: var(--text);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius);
  box-shadow: 0 10px 30px rgba(0,0,0,0.18);
  padding: 14px 16px;
  z-index: 50;
  font-size: 13px;
  line-height: 1.55;
  font-weight: 400;
  letter-spacing: 0;
  text-transform: none;
}
.info-pop:hover .info-pop-content,
.info-pop:focus-within .info-pop-content {
  display: block;
}
.info-pop-content h4 {
  margin: 0 0 6px;
  font-size: 13px;
  font-weight: 600;
  color: var(--text);
}
.info-pop-content h4 + p { margin-top: 0; }
.info-pop-content p { margin: 0 0 8px; }
.info-pop-content p:last-child { margin-bottom: 0; }
.info-pop-content code,
.info-pop-content .formula {
  font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  background: var(--surface-2);
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 12.5px;
  white-space: nowrap;
  display: inline-block;
}
.info-pop-content .formula-block {
  display: block;
  white-space: normal;
  padding: 6px 10px;
  margin: 4px 0 8px;
}
.info-pop-content .muted { color: var(--text-muted); font-size: 12px; }

/* Körpertyp-Diagramm: zentriert, ohne überflüssige Luft um das SVG. */
.body-type-chart h2 { margin-bottom: 4px; }
.body-type-chart svg { display: block; margin: 0 auto; }
.body-type-chart .body-type-caption {
  text-align: left;
  margin: 4px 0 0;
}

.zone-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 16px;
  font-size: 13px;
  color: var(--text-muted);
  margin-top: 4px;
}
.zone-legend-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.zone-legend-swatch {
  display: inline-block;
  width: 14px;
  height: 14px;
  border-radius: 3px;
  border: 1px solid rgba(0,0,0,0.08);
}
.zone-legend-current {
  font-weight: 600;
  color: var(--text);
}
.zone-source {
  font-size: 11px;
  color: var(--text-muted);
  margin-top: 6px;
  margin-bottom: 4px;
}

/* Wartungsseite */
.status-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 14px;
  margin-bottom: 24px;
}
.status-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 14px 16px;
}
.status-card h3 {
  font-size: 12px;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-bottom: 6px;
  font-weight: 600;
}
.status-card .value {
  font-size: 22px;
  font-weight: 600;
  letter-spacing: -0.01em;
  font-variant-numeric: tabular-nums;
}
.status-card .value.ok { color: var(--success); }
.status-card .value.error { color: var(--danger); }
.status-card .value.warn { color: var(--warning); }
.status-card .sub {
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 4px;
}

.action-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 14px;
  margin-bottom: 24px;
}
.action-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 18px 20px;
  display: flex;
  flex-direction: column;
}
.action-card h3 {
  font-size: 15px;
  font-weight: 600;
  color: var(--text);
  text-transform: none;
  letter-spacing: normal;
  margin-bottom: 6px;
}
.action-card p {
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 12px;
  flex: 1;
}
.action-card .btn { align-self: flex-start; }
.action-card .upload-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
}
.action-card input[type="file"] {
  font-size: 13px;
}

.backup-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.backup-item {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 10px 14px;
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}
.backup-item .backup-meta {
  flex: 1;
  min-width: 200px;
}
.backup-item .backup-name {
  font-weight: 500;
  font-size: 14px;
  word-break: break-all;
}
.backup-item .backup-sub {
  font-size: 12px;
  color: var(--text-muted);
  font-variant-numeric: tabular-nums;
}
.backup-item .backup-actions {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}
.backup-empty {
  font-size: 14px;
  color: var(--text-muted);
  padding: 12px 0;
}

/* Helpers */
.flex { display: flex; }
.flex-between { display: flex; justify-content: space-between; align-items: center; }
.gap-8 { gap: 8px; }
.gap-12 { gap: 12px; }
.mt-12 { margin-top: 12px; }
.mt-16 { margin-top: 16px; }
.mb-12 { margin-bottom: 12px; }
.mb-16 { margin-bottom: 16px; }

@media (max-width: 600px) {
  .form-row { flex-direction: column; gap: 0; }
  .container { padding: 16px 14px 48px; }
  .person-header { flex-direction: column; }
  .metric-big { font-size: 38px; }
  table { font-size: 13px; }
  th, td { padding: 8px 10px; }
}