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

:root {
  --color-primary:     #2563eb;
  --color-primary-dk:  #1d4ed8;
  --color-success:     #16a34a;
  --color-danger:      #dc2626;
  --color-warning:     #d97706;
  --color-text:        #1e293b;
  --color-muted:       #64748b;
  --color-border:      #e2e8f0;
  --color-bg:          #f8fafc;
  --color-card:        #ffffff;
  --radius:            8px;
  --shadow:            0 1px 3px rgba(0,0,0,.08), 0 1px 2px rgba(0,0,0,.06);
  --shadow-md:         0 4px 6px rgba(0,0,0,.07), 0 2px 4px rgba(0,0,0,.06);
}

html { font-size: 16px; }
body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.6;
}

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

/* ── Buttons ───────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .4rem;
  padding: .55rem 1.2rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: var(--color-card);
  color: var(--color-text);
  font-size: .9rem;
  font-weight: 500;
  cursor: pointer;
  transition: background .15s, border-color .15s, box-shadow .15s;
  text-decoration: none;
}
.btn:hover { background: var(--color-bg); border-color: #cbd5e1; }
.btn-primary {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: #fff;
}
.btn-primary:hover { background: var(--color-primary-dk); border-color: var(--color-primary-dk); }
.btn-danger { background: var(--color-danger); border-color: var(--color-danger); color: #fff; }
.btn-danger:hover { background: #b91c1c; }
.btn-sm { padding: .35rem .8rem; font-size: .82rem; }
.btn-full { width: 100%; }

/* ── Formulare ─────────────────────────────────────────── */
.form-group { display: flex; flex-direction: column; gap: .4rem; margin-bottom: 1.25rem; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
@media (max-width: 600px) { .form-row { grid-template-columns: 1fr; } }
.flex-wrap { flex-wrap: wrap; }

label { font-size: .88rem; font-weight: 600; color: var(--color-text); }
.label-hint { font-weight: 400; color: var(--color-muted); margin-left: .5rem; }

input[type="text"],
input[type="email"],
input[type="password"],
select,
textarea {
  padding: .6rem .85rem;
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius);
  font-size: .95rem;
  color: var(--color-text);
  background: #fff;
  transition: border-color .15s, box-shadow .15s;
  width: 100%;
}
input:focus, select:focus, textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(37,99,235,.12);
}
textarea { resize: vertical; font-family: inherit; line-height: 1.7; }

.form-actions {
  display: flex;
  gap: .75rem;
  justify-content: flex-end;
  padding-top: 1rem;
  border-top: 1px solid var(--color-border);
  margin-top: 1.5rem;
}

.form-fieldset {
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1.25rem 1.5rem 0.5rem;
  margin-bottom: 1.25rem;
}
.form-fieldset legend {
  font-size: .88rem;
  font-weight: 600;
  color: var(--color-text);
  padding: 0 .4rem;
}
.form-group--checkbox {
  flex-direction: row;
  align-items: center;
  gap: .6rem;
  margin-bottom: 1rem;
}
.form-group--checkbox input[type="checkbox"] {
  width: 1.1rem;
  height: 1.1rem;
  cursor: pointer;
  accent-color: var(--color-primary);
}
.form-group--checkbox label {
  cursor: pointer;
  font-weight: 500;
}

.form-card {
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 2rem;
  box-shadow: var(--shadow);
  max-width: 860px;
}

/* ── Alerts ────────────────────────────────────────────── */
.alert {
  padding: .85rem 1.1rem;
  border-radius: var(--radius);
  margin-bottom: 1.25rem;
  font-size: .9rem;
}
.alert-success { background: #f0fdf4; border: 1px solid #bbf7d0; color: #15803d; }
.alert-error   { background: #fef2f2; border: 1px solid #fecaca; color: #b91c1c; }

/* ── Badges ────────────────────────────────────────────── */
.badge {
  display: inline-block;
  padding: .2rem .65rem;
  border-radius: 9999px;
  font-size: .78rem;
  font-weight: 600;
}
.badge.draft   { background: #f1f5f9; color: #64748b; }
.badge.sent    { background: #eff6ff; color: #2563eb; }
.badge.viewed  { background: #fefce8; color: #a16207; }
.badge.signed  { background: #f0fdf4; color: #15803d; }

/* ── Variablen-Chips ───────────────────────────────────── */
.variables-preview { margin-bottom: 1rem; }
.var-chip, code {
  background: #f1f5f9;
  color: #475569;
  padding: .15rem .5rem;
  border-radius: 4px;
  font-size: .82rem;
  font-family: 'Courier New', monospace;
}

/* ── Signature Canvas ──────────────────────────────────── */
.signature-section, .sign-section {
  margin: 2rem 0;
  padding: 1.5rem;
  border: 1.5px dashed var(--color-border);
  border-radius: var(--radius);
}
.signature-section h3, .sign-section h3 { margin-bottom: .5rem; }
.sig-note, .sig-instruction {
  font-size: .88rem;
  color: var(--color-muted);
  margin-bottom: 1rem;
}

.canvas-wrap {
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius);
  background: #fff;
  cursor: crosshair;
  overflow: hidden;
}
.canvas-wrap canvas { display: block; width: 100%; touch-action: none; }
.canvas-actions { margin-top: .6rem; display: flex; justify-content: flex-end; }

/* ── Login ─────────────────────────────────────────────── */
.login-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #1e3a5f 0%, #2563eb 100%);
}
.login-card {
  background: var(--color-card);
  border-radius: 12px;
  padding: 2.5rem;
  width: 100%;
  max-width: 400px;
  box-shadow: var(--shadow-md);
}
.login-card h1 { font-size: 1.6rem; margin-bottom: .25rem; }
.login-sub { color: var(--color-muted); margin-bottom: 1.75rem; font-size: .9rem; }

/* ── Signing Page ──────────────────────────────────────── */
.sign-page {
  min-height: 100vh;
  background: var(--color-bg);
  padding: 1rem;
}
.sign-container { max-width: 740px; margin: 0 auto; }
.sign-header {
  padding: 1rem 0 1.5rem;
  border-bottom: 1px solid var(--color-border);
  margin-bottom: 1.5rem;
}
.sign-brand { font-size: 1.1rem; font-weight: 700; color: var(--color-text); }

.sign-card {
  background: var(--color-card);
  border-radius: var(--radius);
  padding: 2rem;
  box-shadow: var(--shadow-md);
  margin-bottom: 1.5rem;
}
.contract-title-sign {
  font-size: 1.5rem;
  margin-bottom: 1rem;
  padding-bottom: .75rem;
  border-bottom: 2px solid var(--color-border);
}

.parties-info {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1.5rem;
  padding: 1rem;
  background: var(--color-bg);
  border-radius: var(--radius);
}
.party { display: flex; flex-direction: column; flex: 1; }
.party-role { font-size: .78rem; font-weight: 600; text-transform: uppercase;
              letter-spacing: .05em; color: var(--color-muted); }
.party-name { font-size: 1rem; font-weight: 600; }
.party-divider { font-size: 1.2rem; color: var(--color-muted); }

.contract-scroll-box {
  max-height: 400px;
  overflow-y: auto;
  padding: 1.5rem;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  font-size: .9rem;
  line-height: 1.75;
  margin-bottom: 1.5rem;
  white-space: pre-line;
}

.admin-sig-preview {
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1rem;
  margin-bottom: 1.5rem;
  background: #fafafa;
  text-align: center;
}
.sig-img-preview { max-height: 70px; max-width: 200px; }
.sig-date-small { font-size: .8rem; color: var(--color-muted); margin-top: .3rem; }

.checkbox-label {
  display: flex;
  gap: .75rem;
  align-items: flex-start;
  margin: 1.5rem 0;
  font-size: .9rem;
  line-height: 1.6;
  cursor: pointer;
}
.checkbox-label input { margin-top: .25rem; flex-shrink: 0; width: 1rem; height: 1rem; }

.btn-sign { padding: 1rem; font-size: 1.05rem; margin-bottom: 1rem; }

.legal-note {
  font-size: .78rem;
  color: var(--color-muted);
  text-align: center;
  line-height: 1.5;
}

.dsgvo-details {
  margin-top: 1rem;
  border: 1px solid var(--color-border);
  border-radius: 6px;
  font-size: .8rem;
  color: var(--color-muted);
}
.dsgvo-details summary {
  padding: .6rem .9rem;
  cursor: pointer;
  font-weight: 500;
  user-select: none;
}
.dsgvo-body {
  padding: .75rem .9rem 1rem;
  border-top: 1px solid var(--color-border);
  line-height: 1.6;
}
.dsgvo-body p { margin: .4rem 0; }

/* ── Erfolgs-/Fehler-Karten (Signierseite) ─────────────── */
.success-card, .error-card { text-align: center; padding: 3rem 2rem; }
.success-icon { font-size: 3rem; color: var(--color-success); margin-bottom: 1rem; }
.error-icon   { font-size: 3rem; color: var(--color-danger); margin-bottom: 1rem; }
.success-card h2, .error-card h2 { margin-bottom: .75rem; }
.audit-summary {
  margin-top: 1.5rem;
  padding: 1rem;
  background: var(--color-bg);
  border-radius: var(--radius);
  font-size: .85rem;
  color: var(--color-muted);
  text-align: left;
}
.audit-summary p { margin-bottom: .25rem; }

.sign-footer {
  text-align: center;
  padding: 2rem 0;
  font-size: .82rem;
  color: var(--color-muted);
}

/* ── URL-Kopierfeld ────────────────────────────────────── */
.url-copy {
  font-size: .82rem;
  color: var(--color-muted);
  background: var(--color-bg);
  cursor: text;
}