@import url("https://fonts.googleapis.com/css2?family=DM+Sans:ital,opsz,wght@0,9..40,300;0,9..40,400;0,9..40,500;0,9..40,600;0,9..40,700;1,9..40,400&display=swap");

:root {
  color-scheme: light dark;
  --font: "DM Sans", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --font-mono: ui-monospace, "Cascadia Code", "SF Mono", Menlo, monospace;
  --radius-sm: 6px;
  --radius: 10px;
  --radius-lg: 14px;
  --transition: 0.14s ease;

  --bg0: #f9f9f9;
  --bg1: #f0f0f0;
  --surface: rgba(255, 255, 255, 0.97);
  --surface-solid: #ffffff;
  --text: #0a0a0a;
  --text-secondary: #3a3a3a;
  --muted: #767676;
  --border: rgba(0, 0, 0, 0.1);
  --border-strong: rgba(0, 0, 0, 0.22);
  --accent: #0a0a0a;
  --accent-fg: #ffffff;
  --accent-hover: #2a2a2a;
  --accent-soft: rgba(0, 0, 0, 0.055);
  --ring: rgba(0, 0, 0, 0.15);
  --shadow: 0 1px 2px rgba(0, 0, 0, 0.05), 0 4px 12px rgba(0, 0, 0, 0.04);
  --shadow-lg: 0 2px 6px rgba(0, 0, 0, 0.05), 0 16px 40px rgba(0, 0, 0, 0.08);

  --ok-bg: #f5f5f5;
  --ok-border: #2a2a2a;
  --err-bg: #f5f5f5;
  --err-border: #0a0a0a;
  --warn-bg: #f5f5f5;
  --warn-border: #666;
  --success-bg: var(--ok-bg);
  --success-border: var(--ok-border);
  --error-bg: var(--err-bg);
  --error-border: var(--err-border);
  --warn-bg: #f5f5f5;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg0: #0a0a0a;
    --bg1: #121212;
    --surface: rgba(10, 10, 10, 0.97);
    --surface-solid: #141414;
    --text: #f0f0f0;
    --text-secondary: #aaaaaa;
    --muted: #666666;
    --border: rgba(255, 255, 255, 0.1);
    --border-strong: rgba(255, 255, 255, 0.22);
    --accent: #f0f0f0;
    --accent-fg: #0a0a0a;
    --accent-hover: #d0d0d0;
    --accent-soft: rgba(255, 255, 255, 0.07);
    --ring: rgba(255, 255, 255, 0.18);
    --shadow: 0 1px 3px rgba(0, 0, 0, 0.4), 0 4px 14px rgba(0, 0, 0, 0.25);
    --shadow-lg: 0 2px 8px rgba(0, 0, 0, 0.45), 0 20px 50px rgba(0, 0, 0, 0.35);

    --ok-bg: #1c1c1c;
    --ok-border: #d0d0d0;
    --err-bg: #1c1c1c;
    --err-border: #f0f0f0;
    --warn-bg: #1c1c1c;
    --warn-border: #888;
    --success-bg: var(--ok-bg);
    --success-border: var(--ok-border);
    --error-bg: var(--err-bg);
    --error-border: var(--err-border);
  }
}

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

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

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font);
  font-size: 1rem;
  line-height: 1.55;
  color: var(--text);
  background: var(--bg0);
}

.page {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* ── Header ── */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  background: var(--surface);
  border-bottom: 1px solid var(--border);
}

.site-header__inner {
  max-width: 42rem;
  margin: 0 auto;
  padding: 0.85rem 1.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}

.brand {
  font-weight: 700;
  font-size: 1rem;
  letter-spacing: -0.02em;
  color: var(--text);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  transition: opacity var(--transition);
}

.brand:hover {
  opacity: 0.7;
}

.nav {
  display: flex;
  gap: 0.2rem;
  align-items: center;
}

.nav__link {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--muted);
  text-decoration: none;
  padding: 0.4rem 0.7rem;
  border-radius: var(--radius-sm);
  transition: background var(--transition), color var(--transition);
}

.nav__link:hover {
  color: var(--text);
  background: var(--accent-soft);
}

.nav__link[aria-current="page"] {
  color: var(--text);
  background: var(--accent-soft);
  font-weight: 600;
}

/* ── Main ── */
.main {
  flex: 1;
  max-width: 42rem;
  width: 100%;
  margin: 0 auto;
  padding: 2.25rem 1.25rem 2.5rem;
}

/* ── Footer (Disclaimer) ── */
.site-footer {
  margin-top: auto;
  border-top: 1px solid var(--border);
  background: var(--surface);
  padding: 1.35rem 0 1.75rem;
}

.site-footer__inner {
  max-width: 42rem;
  margin: 0 auto;
  padding: 0 1.25rem;
  text-align: center;
}

.site-footer__disclaimer {
  margin: 0 auto;
  font-size: 0.62rem;
  line-height: 1.5;
  color: var(--muted);
  max-width: 38rem;
  opacity: 0.88;
}

.hero {
  margin-bottom: 2rem;
}

.hero__title {
  font-size: clamp(1.5rem, 4vw, 1.875rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.18;
  margin: 0 0 0.55rem;
}

.hero__lead {
  margin: 0;
  font-size: 0.95rem;
  color: var(--muted);
  max-width: 40ch;
  line-height: 1.6;
}

/* ── Card ── */
.card {
  background: var(--surface-solid);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.6rem 1.75rem;
  box-shadow: var(--shadow-lg);
}

/* ── Form fields ── */
.field {
  margin-bottom: 1.15rem;
}

.field:last-of-type {
  margin-bottom: 0;
}

/* Kleiner & grauer als .foot – Fußnoten-Stil unter Feldern */
.field-hint {
  margin: 0.35rem 0 0;
  max-width: 42ch;
  font-size: 0.62rem;
  line-height: 1.45;
  color: var(--muted);
  opacity: 0.78;
  font-weight: 400;
  letter-spacing: 0.02em;
}

label,
.field__label {
  display: block;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--muted);
  margin-bottom: 0.45rem;
}

input,
textarea {
  width: 100%;
  font: inherit;
  font-size: 0.9rem;
  padding: 0.65rem 0.9rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--surface-solid);
  color: var(--text);
  transition: border-color var(--transition), box-shadow var(--transition);
}

input:focus,
textarea:focus {
  outline: none;
  border-color: var(--muted);
  box-shadow: 0 0 0 2px var(--accent-soft);
}

textarea {
  min-height: 5.75rem;
  resize: vertical;
}

/* ── Buttons ── */
.btn-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 1rem;
}

button,
.btn {
  font: inherit;
  font-weight: 600;
  font-size: 0.875rem;
  padding: 0.6rem 1.1rem;
  border-radius: var(--radius-sm);
  border: none;
  cursor: pointer;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  letter-spacing: -0.01em;
  transition: background var(--transition), color var(--transition), opacity var(--transition),
    transform 0.1s ease;
}

button:active,
.btn:active {
  transform: scale(0.98);
}

.btn--primary {
  background: var(--accent);
  color: var(--accent-fg);
}

.btn--primary:hover {
  background: var(--accent-hover);
}

.btn--secondary {
  background: transparent;
  color: var(--text);
  border: 1.5px solid var(--border-strong);
}

.btn--secondary:hover {
  background: var(--accent-soft);
  border-color: var(--accent);
}

button:disabled,
.btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
  transform: none;
}

.btn--block {
  width: 100%;
  margin-top: 1.1rem;
}

/* ── Alerts & banners ── */
.banner {
  font-size: 0.875rem;
  padding: 0.85rem 1rem 0.85rem 1.1rem;
  border-radius: var(--radius-sm);
  margin-bottom: 1.25rem;
  border: 1px solid transparent;
  border-left: 3px solid transparent;
  line-height: 1.5;
}

.banner--warn {
  background: var(--warn-bg);
  border-color: var(--warn-border);
  border-left-color: var(--warn-border);
  color: var(--text);
}

.banner--warn[hidden] {
  display: none !important;
}

.msg {
  margin-top: 1rem;
  font-size: 0.875rem;
  padding: 0.85rem 1rem 0.85rem 1.1rem;
  border-radius: var(--radius-sm);
  display: none;
  border: 1px solid transparent;
  border-left: 3px solid transparent;
  line-height: 1.5;
}

.msg.is-visible {
  display: block;
}

.msg.ok {
  background: var(--ok-bg);
  border-color: var(--ok-border);
  border-left-color: var(--ok-border);
}

.msg.err {
  background: var(--err-bg);
  border-color: var(--err-border);
  border-left-color: var(--err-border);
  border-left-width: 3px;
}

/* ── Result section (calendar) ── */
.result {
  display: none;
  margin-top: 1.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border);
}

.result.is-visible {
  display: block;
}

.result__title {
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin: 0 0 1.15rem;
  color: var(--muted);
}

.result__group {
  margin-bottom: 1.35rem;
}

.result__group:last-child {
  margin-bottom: 0;
}

.link-box {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  line-height: 1.55;
  word-break: break-all;
  padding: 0.75rem 0.9rem;
  border-radius: var(--radius-sm);
  background: var(--bg0);
  border: 1px solid var(--border-strong);
  margin-bottom: 0.6rem;
  color: var(--text-secondary);
}

/* ── Footer hint ── */
.foot {
  margin-top: 2rem;
  font-size: 0.84rem;
  color: var(--muted);
}

.foot a {
  color: var(--text);
  font-weight: 500;
  text-decoration: underline;
  text-decoration-color: var(--border-strong);
  text-underline-offset: 2px;
}

.foot a:hover {
  text-decoration-color: var(--text);
}

code {
  font-family: var(--font-mono);
  font-size: 0.83em;
  padding: 0.12em 0.38em;
  border-radius: 4px;
  background: var(--accent-soft);
  color: var(--text);
  border: 1px solid var(--border);
}

/* ── Home tiles ── */
.tiles {
  display: grid;
  gap: 1rem;
  margin-top: 1.5rem;
}

@media (min-width: 520px) {
  .tiles {
    grid-template-columns: 1fr 1fr;
  }
}

.tile {
  display: block;
  padding: 1.4rem 1.35rem;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--surface-solid);
  text-decoration: none;
  color: inherit;
  box-shadow: var(--shadow);
  transition: border-color var(--transition), box-shadow var(--transition), transform var(--transition);
}

.tile:hover {
  border-color: var(--border-strong);
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
}

.tile__icon {
  width: 2rem;
  height: 2rem;
  margin-bottom: 0.75rem;
  color: var(--text);
  opacity: 0.85;
}

.tile__icon svg {
  width: 100%;
  height: 100%;
}

.tile__title {
  font-weight: 700;
  font-size: 0.95rem;
  letter-spacing: -0.01em;
  margin: 0 0 0.35rem;
  color: var(--text);
}

.tile__desc {
  margin: 0;
  font-size: 0.84rem;
  color: var(--muted);
  line-height: 1.5;
}

/* ── Dev hint ── */
.mono-hint {
  margin-top: 1.5rem;
  font-size: 0.8rem;
  color: var(--muted);
  padding: 0.75rem 1rem;
  background: var(--bg0);
  border-radius: var(--radius-sm);
  border: 1px dashed var(--border-strong);
}

.mono-hint code {
  background: transparent;
  border: none;
  padding: 0;
}