/* ==========================================================================
   app.css — Reset, Layout und Grundkomponenten
   Views (Fragebogen, Auswertung, ...) kommen spaeter dazu. Nutzt
   ausschliesslich Tokens aus theme.css.
   ========================================================================== */

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

html,
body,
h1, h2, h3, h4, p,
dl, dd, dt,
figure {
  margin: 0;
  padding: 0;
}

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

body {
  min-height: 100%;
  display: flex;
  flex-direction: column;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

img {
  max-width: 100%;
  display: block;
}

button {
  font: inherit;
  color: inherit;
}

a {
  color: var(--accent-strong);
}

/* Zuverlaessiges Verstecken - gewinnt gegen display:flex/grid auf Views. */
[hidden] {
  display: none !important;
}

:focus-visible {
  outline: 2px solid var(--focus-ring);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

/* Nur fuer Screenreader sichtbar - z.B. Labels ohne sichtbaren Text. */
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* ==========================================================================
   Topbar
   ========================================================================== */

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  flex-wrap: wrap;
  padding: var(--space-3) var(--space-4);
  background: var(--bg-elevated);
  border-bottom: var(--border-width) solid var(--border);
  position: sticky;
  top: 0;
  z-index: 20;
}

.topbar__brand {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  min-width: 0;
}

.topbar__mark {
  width: 18px;
  height: 18px;
  border-radius: 5px;
  background: linear-gradient(135deg, var(--accent), var(--accent-dim));
  flex: none;
}

.topbar__title {
  font-weight: 600;
  font-size: 1.1rem;
  letter-spacing: 0.01em;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.topbar__actions {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  flex: none;
}

/* ==========================================================================
   Buttons
   ========================================================================== */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-3);
  min-height: 38px;
  border: var(--border-width) solid transparent;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-weight: 500;
  cursor: pointer;
  background: var(--surface-alt);
  color: var(--text);
  transition: background var(--transition-fast), border-color var(--transition-fast),
    color var(--transition-fast), opacity var(--transition-fast);
}

.btn--primary {
  background: var(--btn-primary-bg);
  color: var(--btn-primary-text);
  border-color: var(--btn-primary-bg);
  font-weight: 600;
}

.btn--primary:hover {
  background: var(--btn-primary-bg-hover);
  border-color: var(--btn-primary-bg-hover);
}

.btn--primary:active {
  background: var(--accent-dim);
  border-color: var(--accent-dim);
}

.btn--secondary {
  background: var(--btn-secondary-bg);
  color: var(--btn-secondary-text);
  border-color: var(--border);
}

.btn--secondary:hover {
  background: var(--btn-secondary-bg-hover);
  border-color: var(--border-strong);
}

.btn--secondary:active {
  background: var(--surface);
}

.btn--ghost {
  background: transparent;
  color: var(--btn-ghost-text);
  border-color: transparent;
}

.btn--ghost:hover {
  background: var(--btn-ghost-bg-hover);
  color: var(--text);
}

.btn--ghost:active {
  background: var(--surface-alt);
}

.btn[disabled] {
  opacity: 0.45;
  cursor: not-allowed;
  pointer-events: none;
}

/* ==========================================================================
   Shell / Views
   ========================================================================== */

.shell {
  width: 100%;
  max-width: var(--shell-max-width);
  margin: 0 auto;
  padding: var(--space-5) var(--space-4) var(--space-6);
  flex: 1 0 auto;
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
}

.panel {
  background: var(--surface);
  border: var(--border-width) solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  padding: var(--space-5);
}

.notice {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-sm);
  border: var(--border-width) solid var(--border);
  background: var(--surface-alt);
  color: var(--text-dim);
  font-size: 0.92rem;
}

.notice--error {
  background: var(--danger-bg);
  border-color: var(--danger);
  color: var(--danger);
}

.notice--warn {
  background: var(--warn-bg);
  border-color: var(--warn);
  color: var(--warn);
}

/* ==========================================================================
   Footer
   ========================================================================== */

.site-footer {
  flex: none;
  padding: var(--space-5) var(--space-4);
  border-top: var(--border-width) solid var(--border);
  background: var(--bg-elevated);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-2);
  text-align: center;
}

.site-footer__links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-4);
  font-size: 0.9rem;
}

.site-footer__note {
  color: var(--muted);
  font-size: 0.85rem;
}

/* ==========================================================================
   Responsive Feinschliff
   ========================================================================== */

@media (max-width: 600px) {
  .shell {
    padding: var(--space-4) var(--space-3) var(--space-5);
  }

  .panel {
    padding: var(--space-4);
  }

  .topbar__title {
    font-size: 1rem;
  }
}

@media (min-width: 900px) {
  .shell {
    padding-top: var(--space-6);
  }
}