/* app.css — Base-Layout, Komponenten, Mobile-First (ab 320px).
 *
 * Token-Quelle: tokens.css. Keine Hardcode-Farben hier.
 * Konvention: stroke-basierte Inline-SVG-Icons (currentColor) — keine Emojis, keine Icon-Fonts.
 * Geld-Darstellung: Euro (€/EUR) — niemals Dollar.
 */

/* ---------------- Reset + Base ---------------- */
*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
}

body {
  margin: 0;
  padding: 0;
  background: var(--brand-bg);
  color: var(--brand-text);
  font-family: var(--font-sans);
  font-size: var(--fs-400);
  line-height: var(--lh-base);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a {
  color: var(--brand-accent-strong);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 2px;
  transition: color var(--dur-fast) var(--ease-out);
}
a:hover,
a:focus-visible {
  color: var(--brand-text);
}
a:focus-visible,
button:focus-visible,
input:focus-visible,
[tabindex]:focus-visible {
  outline: none;
  box-shadow: var(--shadow-focus);
  border-radius: var(--radius-sm);
}

h1,
h2,
h3 {
  font-weight: 700;
  line-height: var(--lh-tight);
  margin: 0 0 var(--sp-4);
  letter-spacing: -0.01em;
}
h1 { font-size: var(--fs-800); }
h2 { font-size: var(--fs-700); }
h3 { font-size: var(--fs-600); }

p { margin: 0 0 var(--sp-4); }
small { font-size: var(--fs-300); color: var(--brand-text-muted); }

img,
svg {
  max-width: 100%;
  height: auto;
  display: block;
}

/* ---------------- Layout-Container ---------------- */
.app-shell {
  max-width: 960px;
  margin: 0 auto;
  padding: var(--sp-5) var(--sp-4);
}
.app-shell--narrow {
  max-width: 560px;
}
.app-shell--centered {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.stack > * + * {
  margin-top: var(--sp-4);
}
.stack--lg > * + * {
  margin-top: var(--sp-6);
}

/* ---------------- Header ---------------- */
.app-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-4);
  padding: var(--sp-3) var(--sp-4);
  border-bottom: 1px solid var(--brand-border);
  background: var(--brand-bg-elevated);
}
.app-header__brand {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-2);
  font-weight: 700;
  color: var(--brand-text);
  text-decoration: none;
  letter-spacing: 0.02em;
}
.app-header__brand-mark {
  width: 28px;
  height: 28px;
  border-radius: var(--radius-sm);
  background: var(--brand-primary);
  color: var(--brand-primary-contrast);
  display: inline-grid;
  place-items: center;
  font-weight: 700;
  font-size: 0.85rem;
}

/* ---------------- Cards ---------------- */
.card {
  background: var(--brand-bg-elevated);
  border: 1px solid var(--brand-border);
  border-radius: var(--radius-lg);
  padding: var(--sp-5);
  box-shadow: var(--shadow-card);
  transition: transform var(--dur-base) var(--ease-out),
    box-shadow var(--dur-base) var(--ease-out);
}
.card--hoverable:hover,
.card--hoverable:focus-within {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lift);
}
.card__title {
  margin: 0 0 var(--sp-2);
  font-size: var(--fs-600);
}
.card__hint {
  color: var(--brand-text-muted);
  font-size: var(--fs-300);
}

/* ---------------- Pill-Buttons ---------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--sp-2);
  min-height: 44px;     /* Touch-Target ≥ 44px */
  padding: var(--sp-3) var(--sp-5);
  border-radius: var(--radius-pill);
  border: 1px solid transparent;
  font: inherit;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
  transition:
    background-color var(--dur-fast) var(--ease-out),
    color var(--dur-fast) var(--ease-out),
    transform var(--dur-fast) var(--ease-out),
    box-shadow var(--dur-fast) var(--ease-out);
  -webkit-appearance: none;
  appearance: none;
}
.btn:active {
  transform: translateY(1px);
}
.btn:disabled {
  cursor: not-allowed;
  opacity: 0.55;
}

.btn--primary {
  background: var(--brand-primary);
  color: var(--brand-primary-contrast);
}
.btn--primary:hover:not(:disabled) {
  background: var(--brand-accent-strong);
  color: var(--brand-primary-contrast);
}

.btn--accent {
  background: var(--brand-accent);
  color: #1A1A1A;
  border-color: var(--brand-accent-strong);
}
.btn--accent:hover:not(:disabled) {
  background: var(--brand-accent-strong);
  color: var(--brand-primary-contrast);
}

.btn--ghost {
  background: transparent;
  color: var(--brand-text);
  border-color: var(--brand-border);
}
.btn--ghost:hover:not(:disabled) {
  background: var(--brand-surface-hover);
}

.btn--block {
  width: 100%;
}

/* ---------------- Form-Felder ---------------- */
.field {
  display: block;
  margin-bottom: var(--sp-4);
}
.field__label {
  display: block;
  font-weight: 600;
  margin-bottom: var(--sp-2);
  font-size: var(--fs-300);
  letter-spacing: 0.02em;
  text-transform: uppercase;
  color: var(--brand-text-muted);
}
.field__input {
  display: block;
  width: 100%;
  min-height: 44px;
  padding: var(--sp-3) var(--sp-4);
  border-radius: var(--radius-md);
  border: 1px solid var(--brand-border);
  background: var(--brand-bg-elevated);
  color: var(--brand-text);
  font: inherit;
}
.field__input::placeholder {
  color: var(--brand-text-muted);
}
.field__hint {
  margin-top: var(--sp-2);
  font-size: var(--fs-300);
  color: var(--brand-text-muted);
}

/* ---------------- Status / Alerts ---------------- */
.status {
  min-height: 1.5em;
  font-size: var(--fs-300);
  margin: var(--sp-3) 0 0;
}
.status--ok    { color: var(--brand-success); }
.status--err   { color: var(--brand-danger); }
.status--muted { color: var(--brand-text-muted); }

/* ---------------- Divider ---------------- */
.divider-or {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  color: var(--brand-text-muted);
  font-size: var(--fs-300);
  margin: var(--sp-5) 0;
}
.divider-or::before,
.divider-or::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--brand-border);
}

/* ---------------- Brand-Splash (Login-Hero / Pre-Redirect) ---------------- */
.brand-splash {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: var(--sp-3);
  padding: var(--sp-7) var(--sp-4);
}
.brand-splash__title {
  font-size: var(--fs-700);
  margin: 0;
}
.brand-splash__sub {
  color: var(--brand-text-muted);
  margin: 0;
  max-width: 36ch;
}

/* ---------------- Theme-Toggle-Knopf ---------------- */
.theme-toggle {
  min-height: 36px;
  min-width: 36px;
  padding: 0 var(--sp-3);
  border-radius: var(--radius-pill);
  border: 1px solid var(--brand-border);
  background: var(--brand-bg-elevated);
  color: var(--brand-text);
  font: inherit;
  font-size: var(--fs-300);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: var(--sp-2);
}
.theme-toggle:hover {
  background: var(--brand-surface-hover);
}

/* ---------------- Inline-SVG-Icons (stroke = currentColor) ---------------- */
.icon {
  width: 1em;
  height: 1em;
  stroke: currentColor;
  fill: none;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
  flex-shrink: 0;
}

/* ---------------- Skip-Link (A11y) ---------------- */
.skip-link {
  position: absolute;
  top: -100px;
  left: var(--sp-3);
  background: var(--brand-primary);
  color: var(--brand-primary-contrast);
  padding: var(--sp-2) var(--sp-3);
  border-radius: var(--radius-sm);
  z-index: 10;
}
.skip-link:focus {
  top: var(--sp-3);
}

/* ---------------- Password-Rules-Indicator (Plan 04-01.1) -----------
 * Live-Hint-Liste unter Passwort-Inputs. Pure CSS-Class-Toggle, kein
 * Live-Score, nur visuelle Bestätigung der validatePassword()-Regeln.
 * Jede Regel hat 2 Zustände: unmet (Default, grau + Bullet) und met
 * (grün + Häkchen-SVG-Mask). Keine Icon-Fonts, keine Emojis.
 */
.password-rules {
  list-style: none;
  padding: 0;
  margin: var(--sp-2) 0 0;
  display: flex;
  flex-direction: column;
  gap: var(--sp-1);
  font-size: var(--fs-300);
  color: var(--brand-text-muted);
}
.password-rules__item {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
  transition: color var(--dur-fast) var(--ease-out);
}
.password-rules__item::before {
  content: '';
  display: inline-block;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--brand-border);
  flex-shrink: 0;
  transition:
    background-color var(--dur-fast) var(--ease-out),
    box-shadow var(--dur-fast) var(--ease-out);
}
.password-rules__item.is-met {
  color: var(--brand-success);
}
.password-rules__item.is-met::before {
  background: var(--brand-success);
  /* Inline-SVG-Häkchen als Mask → respektiert currentColor-Cousin via white-Contrast */
  box-shadow: inset 0 0 0 2px var(--brand-bg-elevated);
}

/* Optionale Sammelanzeige als 3-stufige Bar (z.B. unter dem Confirm-Feld).
 * Step-Klassen: .is-step-1 / .is-step-2 / .is-step-3 (per JS gesetzt). */
.password-strength {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--sp-1);
  margin-top: var(--sp-2);
}
.password-strength__step {
  height: 4px;
  border-radius: var(--radius-pill);
  background: var(--brand-border);
  transition: background-color var(--dur-fast) var(--ease-out);
}
.password-strength.is-step-1 .password-strength__step:nth-child(1) { background: var(--brand-danger); }
.password-strength.is-step-2 .password-strength__step:nth-child(-n+2) { background: var(--brand-accent); }
.password-strength.is-step-3 .password-strength__step { background: var(--brand-success); }

/* ---------------- Auth-Footer-Link (Plan 04-01.1) ----------------
 * Kleiner sekundärer Aktionslink unter Auth-Forms (z.B. "Passwort vergessen?",
 * "Per E-Mail-Link statt Passwort"). Bewusst leise, kein Konkurrent zum
 * Primary-CTA.
 */
.auth-secondary {
  text-align: center;
  font-size: var(--fs-300);
  color: var(--brand-text-muted);
}
.auth-secondary a {
  color: var(--brand-text-muted);
}
.auth-secondary a:hover,
.auth-secondary a:focus-visible {
  color: var(--brand-text);
}

/* ---------------- <details>-Toggle für Sekundär-Auth (Plan 04-01.1) -----
 * Magic-Link-Block + OTP-Code-Block auf login.html werden in <details>-Tags
 * eingeklappt. Hier passendes minimalistisches Styling.
 */
.auth-details {
  border: 1px solid var(--brand-border);
  border-radius: var(--radius-md);
  padding: var(--sp-3) var(--sp-4);
  background: var(--brand-bg-elevated);
}
.auth-details > summary {
  list-style: none;
  cursor: pointer;
  font-weight: 600;
  font-size: var(--fs-300);
  color: var(--brand-text);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-2);
  min-height: 32px;
}
.auth-details > summary::-webkit-details-marker {
  display: none;
}
.auth-details > summary::after {
  content: '+';
  font-size: var(--fs-500);
  color: var(--brand-text-muted);
  line-height: 1;
}
.auth-details[open] > summary::after {
  content: '–';
}
.auth-details[open] {
  padding-bottom: var(--sp-4);
}
.auth-details > *:not(summary) {
  margin-top: var(--sp-3);
}

/* ---------------- Responsive ---------------- */
@media (min-width: 720px) {
  .app-shell {
    padding: var(--sp-6) var(--sp-5);
  }
}