/* Digitale Schulentschuldigung - zentrales Stylesheet
   Nur visuelles Design - keine Klassennamen wurden veraendert, damit
   alle bestehenden Seiten ohne Anpassung weiter funktionieren. */

:root {
  --color-primary: #4f46e5;
  --color-primary-dark: #4338ca;
  --color-accent: #7c3aed;
  --color-bg-start: #eef1ff;
  --color-bg-end: #f6f2ff;
  --color-card: #ffffff;
  --color-text: #1a1725;
  --color-muted: #6b7280;
  --color-border: #e6e4f0;
  --color-success-bg: #ecfdf5;
  --color-success-text: #047857;
  --color-error-bg: #fef2f2;
  --color-error-text: #b91c1c;
  --radius: 24px;
  --radius-sm: 14px;
  --transition: 180ms cubic-bezier(0.4, 0, 0.2, 1);
}

* {
  box-sizing: border-box;
}

html {
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  color: var(--color-text);
  line-height: 1.55;
  min-height: 100vh;
  position: relative;
  overflow-x: hidden;
  /* Echtes Hintergrundbild - deckt den ganzen sichtbaren Bereich ab und
     bleibt beim Scrollen fixiert. */
  background-image: url("dipl hintergrund.png");
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  background-attachment: fixed;
  /* Flex-Spalte, damit die Fusszeile immer am unteren Rand des Fensters
     bleibt - auch wenn eine Seite (z.B. eine leere Tabelle) wenig Inhalt hat. */
  display: flex;
  flex-direction: column;
}

@media (max-width: 900px) {
  /* "fixed" verursacht auf manchen mobilen Browsern Ruckler beim Scrollen -
     dort ganz normal mitscrollen lassen. */
  body {
    background-attachment: scroll;
  }
}

/* --- Navigation --- */

.topnav {
  background: rgba(255, 255, 255, 0.65);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border-bottom: 1px solid rgba(255, 255, 255, 0.5);
  box-shadow: 0 1px 0 rgba(255, 255, 255, 0.8) inset, 0 8px 30px -14px rgba(79, 70, 229, 0.35);
  padding: 18px 28px;
  display: flex;
  align-items: center;
  justify-content: flex-start;
  position: sticky;
  top: 0;
  z-index: 10;
  flex-wrap: wrap;
  gap: 10px;
}

.topnav .brand {
  font-weight: 700;
  font-size: 15.5px;
  color: var(--color-text);
  letter-spacing: -0.01em;
  display: flex;
  align-items: center;
  gap: 10px;
}

.brand-logo {
  display: block;
  height: 54px;
  width: auto;
  object-fit: contain;
}

/* Schiebt Nav-Links (und damit auch den Avatar danach) ganz nach rechts,
   waehrend der Markenname links bleibt. */
.nav-links {
  display: flex;
  align-items: center;
  gap: 3px;
  margin-left: auto;
}

.topnav a {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  color: var(--color-muted);
  text-decoration: none;
  padding: 8px 14px;
  border-radius: 999px;
  font-size: 13.5px;
  font-weight: 600;
  position: relative;
  transition: color var(--transition), background var(--transition);
}

.topnav a svg {
  width: 14px;
  height: 14px;
  flex-shrink: 0;
}

.topnav a:hover {
  color: var(--color-primary);
  background: rgba(79, 70, 229, 0.09);
}

.topnav a:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

/* Aktiver Nav-Link als vollflaechig gefuellte Pille (wie bei echten App-Navigationen). */
.topnav a.active {
  color: #fff;
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  box-shadow: 0 3px 8px -2px rgba(79, 70, 229, 0.5);
}

.topnav a.active:hover {
  color: #fff;
}

.avatar {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  flex-shrink: 0;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  color: #fff;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.02em;
  box-shadow: 0 2px 6px -1px rgba(79, 70, 229, 0.5);
}

.avatar-dot {
  position: absolute;
  bottom: -1px;
  right: -1px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #22c55e;
  border: 2px solid #fff;
}

/* --- Layout / Card --- */

.page {
  display: flex;
  justify-content: center;
  align-items: flex-start;
  padding: 96px 20px;
  position: relative;
  z-index: 1;
  flex: 1 0 auto;
}

.card {
  background: var(--color-card);
  position: relative;
  border: 1px solid rgba(255, 255, 255, 0.7);
  border-radius: var(--radius);
  box-shadow:
    0 0 0 1px rgba(79, 70, 229, 0.04),
    0 2px 6px rgba(30, 27, 46, 0.04),
    0 16px 32px -8px rgba(79, 70, 229, 0.20),
    0 40px 80px -20px rgba(79, 70, 229, 0.30);
  padding: 64px 56px;
  width: 100%;
  max-width: 560px;
  overflow: hidden;
  animation: card-in 520ms cubic-bezier(0.16, 1, 0.3, 1);
}

.card.wide {
  max-width: 920px;
}

/* Farbiger Akzentstreifen oben an der Card - typisches Premium-SaaS-Detail. */
.card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 5px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-accent), var(--color-primary));
  background-size: 200% 100%;
  animation: sheen 6s linear infinite;
}

@keyframes sheen {
  to { background-position: -200% 0; }
}

@keyframes card-in {
  from {
    opacity: 0;
    transform: translateY(16px) scale(0.98);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

.card h2 {
  margin-top: 0;
  margin-bottom: 10px;
  font-size: 32px;
  font-weight: 800;
  letter-spacing: -0.02em;
  background: linear-gradient(135deg, var(--color-text) 40%, var(--color-primary) 130%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

/* Kleine Pille ueber der Ueberschrift, sorgt fuer den "Produkt"-Charakter
   moderner SaaS-Landingpages/Formulare. */
.badge {
  display: inline-block;
  margin: 0 0 18px;
  padding: 7px 16px;
  border-radius: 999px;
  background: rgba(79, 70, 229, 0.09);
  color: var(--color-primary);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.card-subtitle {
  margin: 0 0 32px;
  color: var(--color-muted);
  font-size: 15px;
}

/* --- Formulare --- */

label {
  display: block;
  font-size: 14px;
  font-weight: 700;
  margin-bottom: 10px;
  color: var(--color-text);
}

input[type="text"],
input[type="email"],
input[type="password"],
input[type="date"],
input[type="tel"],
input[type="file"],
select {
  width: 100%;
  padding: 16px 19px;
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-size: 16px;
  font-family: inherit;
  margin-bottom: 26px;
  background: #faf9ff;
  color: var(--color-text);
  transition: border-color var(--transition), box-shadow var(--transition), background var(--transition), transform var(--transition);
}

input::placeholder {
  color: #a8a6b8;
}

input[type="text"]:hover,
input[type="email"]:hover,
input[type="password"]:hover,
input[type="date"]:hover,
input[type="tel"]:hover,
select:hover {
  border-color: #cbc8e0;
}

input:focus,
select:focus {
  outline: none;
  border-color: var(--color-primary);
  background: #fff;
  box-shadow: 0 0 0 5px rgba(79, 70, 229, 0.15), 0 4px 14px -4px rgba(79, 70, 229, 0.35);
}

/* Eigener Pfeil fuer <select>, da der Browser-Standardpfeil optisch nicht
   zum restlichen, modernen Formular-Design passt. */
select {
  appearance: none;
  -webkit-appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='7' viewBox='0 0 10 6'%3E%3Cpath d='M1 1l4 4 4-4' stroke='%236b7280' stroke-width='1.5' fill='none' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 20px center;
  padding-right: 46px;
  cursor: pointer;
}

/* Zwei nebeneinanderliegende Felder (z.B. Von/Bis-Datum). */
.field-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
  margin-bottom: 8px;
}

.field-row input {
  margin-bottom: 0;
}

/* Der native Kalender-Icon-Button bei type="date" wird in der Akzentfarbe
   eingefaerbt, damit er zum restlichen Design passt (Chrome/Edge). */
input[type="date"]::-webkit-calendar-picker-indicator {
  filter: invert(29%) sepia(80%) saturate(2500%) hue-rotate(230deg) brightness(95%);
  cursor: pointer;
  padding: 3px;
}

input[type="file"] {
  padding: 13px 15px;
  cursor: pointer;
}

input[type="file"]::file-selector-button {
  border: none;
  background: var(--color-bg-start);
  color: var(--color-primary);
  font-weight: 700;
  font-size: 13.5px;
  padding: 10px 16px;
  border-radius: 9px;
  margin-right: 14px;
  cursor: pointer;
  transition: background var(--transition);
}

input[type="file"]::file-selector-button:hover {
  background: #e0e0fb;
}

/* --- Buttons --- */

button,
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
  position: relative;
  overflow: hidden;
  isolation: isolate;
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  color: #fff;
  border: none;
  padding: 11px 20px;
  border-radius: var(--radius-sm);
  font-size: 14.5px;
  font-family: inherit;
  font-weight: 600;
  letter-spacing: 0.01em;
  cursor: pointer;
  text-decoration: none;
  text-align: center;
  box-shadow: 0 2px 4px rgba(79, 70, 229, 0.2), 0 8px 18px -6px rgba(79, 70, 229, 0.5);
  transition: transform var(--transition), box-shadow var(--transition), filter var(--transition);
}

button svg,
.btn svg {
  width: 15px;
  height: 15px;
  flex-shrink: 0;
}

/* Diagonaler Lichtschein, der beim Hover ueber den Button faehrt - dezenter
   "Premium"-Effekt, wie man ihn bei modernen Landingpages/Buttons findet. */
button::after,
.btn::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(115deg, transparent 30%, rgba(255, 255, 255, 0.35) 48%, transparent 65%);
  transform: translateX(-120%);
  transition: transform 550ms cubic-bezier(0.4, 0, 0.2, 1);
  z-index: -1;
}

button:hover::after,
.btn:hover::after {
  transform: translateX(120%);
}

button[type="submit"] {
  display: block;
  width: 100%;
  margin-top: 8px;
}

.text-center {
  text-align: center;
}

button:hover,
.btn:hover {
  filter: brightness(1.07);
  transform: translateY(-2px);
  box-shadow: 0 6px 12px rgba(79, 70, 229, 0.25), 0 20px 40px -10px rgba(79, 70, 229, 0.65);
}

button:active,
.btn:active {
  transform: translateY(0);
  filter: brightness(0.98);
}

button:focus-visible,
.btn:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 3px;
}

.btn-secondary {
  background: transparent;
  color: var(--color-primary);
  border: 1.5px solid var(--color-border);
  box-shadow: none;
}

.btn-secondary::after {
  display: none;
}

.btn-secondary:hover {
  background: var(--color-bg-start);
  border-color: #cbc8e0;
  filter: none;
  box-shadow: none;
}

/* --- Hinweise / Meldungen --- */

.hint {
  font-size: 13.5px;
  color: var(--color-muted);
  margin-top: -14px;
  margin-bottom: 26px;
  line-height: 1.55;
}

.alert {
  padding: 15px 19px;
  border-radius: var(--radius-sm);
  font-size: 14.5px;
  margin-bottom: 26px;
  border-left: 3px solid transparent;
  animation: card-in 300ms cubic-bezier(0.16, 1, 0.3, 1);
}

.alert-error {
  background: var(--color-error-bg);
  color: var(--color-error-text);
  border-left-color: var(--color-error-text);
}

.alert-success {
  background: var(--color-success-bg);
  color: var(--color-success-text);
  border-left-color: var(--color-success-text);
}

.form-footer {
  margin-top: 30px;
  font-size: 14.5px;
  color: var(--color-muted);
  text-align: center;
}

.form-footer a {
  color: var(--color-primary);
  text-decoration: none;
  font-weight: 700;
  transition: color var(--transition);
}

.form-footer a:hover {
  color: var(--color-primary-dark);
  text-decoration: underline;
}

/* --- Tabelle --- */

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14.5px;
}

.card.wide {
  overflow-x: auto;
  display: block;
}

.card.wide > * {
  min-width: 0;
}

th, td {
  text-align: left;
  padding: 15px 16px;
  border-bottom: 1px solid var(--color-border);
  white-space: nowrap;
}

th {
  color: var(--color-muted);
  font-weight: 700;
  font-size: 12px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

tbody tr {
  transition: background var(--transition);
}

tbody tr:hover {
  background: #faf9ff;
}

tbody tr:last-child td {
  border-bottom: none;
}

.actions-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 28px;
  flex-wrap: wrap;
  gap: 14px;
}

.actions-row .btn {
  padding: 10px 18px;
  font-size: 13.5px;
}

/* --- Fusszeile --- */

.site-footer {
  position: relative;
  z-index: 1;
  flex-shrink: 0;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px;
  padding: 22px 40px 28px;
  font-size: 13px;
  color: var(--color-muted);
}

/* --- Responsive (Handy) --- */

@media (max-width: 640px) {
  .field-row {
    grid-template-columns: 1fr;
    gap: 0;
  }
}

@media (max-width: 600px) {
  .page {
    padding: 36px 14px;
  }

  .card {
    padding: 36px 26px;
    border-radius: var(--radius-sm);
  }

  .card h2 {
    font-size: 25px;
  }

  .card-subtitle {
    margin-bottom: 26px;
  }

  .topnav {
    padding: 14px 18px;
  }

  .nav-links {
    gap: 0;
    order: 3;
    width: 100%;
    justify-content: space-between;
  }

  .topnav a {
    padding: 8px 10px;
    font-size: 13px;
  }

  .topnav a svg {
    width: 16px;
    height: 16px;
  }

  button,
  .btn {
    width: 100%;
  }

  .site-footer {
    padding: 18px 20px 22px;
    justify-content: center;
    text-align: center;
  }
}