/* ══════════════════════════════════════════════════════════════════════════
   PROJEKTPLANER — Mobile-Optimiertes Stylesheet
   Breakpoints: 480px (Smartphone), 768px (Tablet)
   ══════════════════════════════════════════════════════════════════════════ */

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

:root {
  --navy:      #1E3A5F;
  --accent:    #2D9CDB;
  --accent-dk: #1a7ab8;
  --green:     #27AE60;
  --amber:     #F39C12;
  --red:       #E74C3C;
  --purple:    #8E44AD;
  --bg:        #F0F4F8;
  --white:     #FFFFFF;
  --gray-100:  #F8FAFC;
  --gray-200:  #EEF2F7;
  --gray-300:  #E2E8F0;
  --gray-400:  #CBD5E1;
  --gray-600:  #64748B;
  --gray-800:  #334155;
  --dark:      #0F1B2D;
  --radius:    10px;
  --shadow:    0 2px 12px rgba(0,0,0,.08);
  --shadow-lg: 0 8px 32px rgba(0,0,0,.12);
  --trans:     .2s ease;
}

/* ── Body — Kein horizontales Scrollen ────────────────────────────────────── */
/* MOBILE-FIX: overflow-x verhindert horizontales Scrollen auf schmalen Screens */
body {
  font-family: 'Segoe UI', Arial, sans-serif;
  background: var(--bg);
  color: var(--gray-800);
  min-height: 100vh;
  overflow-x: hidden; /* MOBILE-FIX: Kein horizontaler Scroll */
}

/* ── Bilder responsiv ─────────────────────────────────────────────────────── */
/* MOBILE-FIX: Alle Bilder passen sich automatisch an den Container an */
img, svg, video {
  max-width: 100%;
  height: auto;
  display: block;
}

/* ── Typography ───────────────────────────────────────────────────────────── */
h1, h2, h3 { font-weight: 700; color: var(--navy); }
h1 { font-size: 1.6rem; }
h2 { font-size: 1.25rem; }
h3 { font-size: 1rem; }
/* MOBILE-FIX: Mindestens 16px Body-Text — verhindert Auto-Zoom auf iOS */
p  { font-size: 1rem; line-height: 1.6; }

/* ── Header / Navbar ──────────────────────────────────────────────────────── */
.navbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--navy);
  color: var(--white);
  padding: .75rem 1.5rem;
  /* MOBILE-FIX: Höhe auf auto, damit Inhalt bei Wrap nicht abgeschnitten wird */
  min-height: 56px;
  height: auto;
  position: sticky;
  top: 0;
  z-index: 200;
  box-shadow: 0 2px 8px rgba(0,0,0,.2);
}

.navbar-brand {
  display: flex;
  align-items: center;
  gap: .6rem;
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--white);
  text-decoration: none;
  /* MOBILE-FIX: Mindest-Tap-Target 44px */
  min-height: 44px;
}

.navbar-brand .icon { font-size: 1.4rem; }

/* Desktop: alle Nav-Items nebeneinander sichtbar */
.navbar-right {
  display: flex;
  align-items: center;
  gap: .75rem;
}

.navbar-user {
  font-size: .85rem;
  opacity: .8;
}

.navbar a { color: var(--white); text-decoration: none; }

/* ── Hamburger-Button (nur auf Mobile sichtbar) ───────────────────────────── */
/* MOBILE-FIX: Hamburger-Menü für die Navbar auf kleinen Screens */
.hamburger {
  display: none; /* Desktop: ausgeblendet */
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  /* MOBILE-FIX: Touch-Target mind. 44×44px */
  width: 44px;
  height: 44px;
  background: transparent;
  border: none;
  cursor: pointer;
  padding: 8px;
  border-radius: 6px;
  transition: background var(--trans);
  flex-shrink: 0;
}
.hamburger:hover { background: rgba(255,255,255,.15); }

.hamburger .bar {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--white);
  border-radius: 2px;
  transition: transform .25s ease, opacity .25s ease;
}

/* Hamburger → X Animation wenn Menü offen */
.hamburger.open .bar:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.open .bar:nth-child(2) { opacity: 0; }
.hamburger.open .bar:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ── Mobile Nav-Drawer ────────────────────────────────────────────────────── */
/* MOBILE-FIX: Mobile Nav fährt von oben ein wenn Hamburger geklickt */
@media (max-width: 768px) {
  .hamburger {
    display: flex; /* Hamburger auf Mobile anzeigen */
  }

  .navbar-right {
    display: none; /* Desktop-Nav verstecken */
    position: absolute;
    top: 100%; /* direkt unter der Navbar */
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    background: var(--navy);
    padding: .75rem 1.25rem 1rem;
    gap: .5rem;
    box-shadow: 0 8px 24px rgba(0,0,0,.25);
    z-index: 199;
    border-top: 1px solid rgba(255,255,255,.1);
  }

  /* Menü öffnen wenn navbar-right die open-Klasse hat */
  .navbar-right.open {
    display: flex;
  }

  /* Admin-Nav-Links als eigene Zeile im Mobile-Menü */
  #admin-nav-link {
    display: flex !important;
    flex-direction: column;
    gap: .4rem;
    margin-right: 0 !important;
    width: 100%;
  }

  /* MOBILE-FIX: Alle Nav-Buttons auf volle Breite + 44px Tap-Target */
  .navbar-right .btn,
  .navbar-right .btn-nav,
  .navbar-right .btn-white {
    width: 100%;
    justify-content: flex-start;
    min-height: 44px;
    padding: .65rem 1rem;
    font-size: 1rem;
  }

  .navbar-user, .role-badge {
    padding: .3rem 0;
    font-size: .9rem;
  }
}

/* ── Buttons ──────────────────────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: .4rem;
  padding: .5rem 1.1rem;
  border: none;
  border-radius: 6px;
  font-size: .9rem;
  font-weight: 600;
  cursor: pointer;
  transition: background var(--trans), transform var(--trans), box-shadow var(--trans);
  white-space: nowrap;
  /* MOBILE-FIX: Touch-Target mind. 44px Höhe */
  min-height: 44px;
  touch-action: manipulation; /* MOBILE-FIX: 300ms Tap-Delay entfernen */
}
.btn:hover  { transform: translateY(-1px); box-shadow: 0 4px 12px rgba(0,0,0,.15); }
.btn:active { transform: translateY(0); }

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

.btn-success  { background: var(--green);   color: var(--white); }
.btn-success:hover  { background: #1e8449; }

.btn-danger   { background: var(--red);     color: var(--white); }
.btn-danger:hover   { background: #c0392b; }

.btn-ghost    { background: transparent; color: var(--navy); border: 1.5px solid var(--gray-400); }
.btn-ghost:hover    { background: var(--gray-200); }

.btn-white    { background: var(--white); color: var(--navy); }
.btn-white:hover    { background: var(--gray-100); }

/* MOBILE-FIX: btn-sm ebenfalls 44px Tap-Target für Touch */
.btn-sm {
  padding: .5rem .75rem;
  font-size: .82rem;
  display: inline-flex;
  align-items: center;
  gap: 3px;
  line-height: 1.4;
  min-height: 44px; /* MOBILE-FIX: Tap-Target */
}
.btn-lg { padding: .7rem 1.5rem; font-size: 1rem; }
.btn-full { width: 100%; justify-content: center; }

/* ── Forms ────────────────────────────────────────────────────────────────── */
.form-group { margin-bottom: 1rem; }
.form-group label {
  display: block;
  /* MOBILE-FIX: Label mind. 16px für Lesbarkeit */
  font-size: 1rem;
  font-weight: 600;
  color: var(--gray-600);
  margin-bottom: .35rem;
}

input[type="text"],
input[type="email"],
input[type="password"],
input[type="date"],
textarea,
select {
  width: 100%;
  /* MOBILE-FIX: Padding erhöht → bessere Bedienbarkeit, mind. 44px Tap-Target */
  padding: .75rem .85rem;
  border: 1.5px solid var(--gray-400);
  border-radius: 6px;
  /* MOBILE-FIX: 16px verhindert Auto-Zoom auf iOS Safari */
  font-size: 1rem;
  font-family: inherit;
  color: var(--gray-800);
  background: var(--white);
  transition: border-color var(--trans), box-shadow var(--trans);
  touch-action: manipulation; /* MOBILE-FIX: Tap-Delay entfernen */
  /* MOBILE-FIX: Kein horizontaler Overflow */
  max-width: 100%;
}
input:focus, textarea:focus, select:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(45,156,219,.15);
}

textarea { resize: vertical; min-height: 80px; }

/* MOBILE-FIX: form-row bricht bei 480px auf eine Spalte um */
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
@media (max-width: 480px) { .form-row { grid-template-columns: 1fr; } } /* MOBILE-FIX: 480px Breakpoint */

/* ── Cards ────────────────────────────────────────────────────────────────── */
.card {
  background: var(--white);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 1.4rem;
}

.card-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 1rem;
  /* MOBILE-FIX: Auf kleinen Screens umbrechen */
  flex-wrap: wrap;
  gap: .5rem;
}

/* ── Badge / Pill ─────────────────────────────────────────────────────────── */
.badge {
  display: inline-block;
  padding: .2rem .6rem;
  border-radius: 20px;
  font-size: .78rem;
  font-weight: 600;
}
.badge-blue   { background: #DBEAFE; color: #1D4ED8; }
.badge-green  { background: #DCFCE7; color: #15803D; }
.badge-amber  { background: #FEF3C7; color: #92400E; }
.badge-red    { background: #FEE2E2; color: #B91C1C; }
.badge-purple { background: #EDE9FE; color: #6D28D9; }

/* ── Alert / Message ──────────────────────────────────────────────────────── */
.alert {
  padding: .7rem 1rem;
  border-radius: 6px;
  /* MOBILE-FIX: mind. 16px */
  font-size: 1rem;
  margin-top: .75rem;
  min-height: 1.2em;
}
.alert-error   { background: #FEE2E2; color: #B91C1C; border-left: 3px solid var(--red); }
.alert-success { background: #DCFCE7; color: #15803D; border-left: 3px solid var(--green); }
.alert-hidden  { display: none; }

/* ── Auth Page ────────────────────────────────────────────────────────────── */
.auth-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--dark) 0%, var(--navy) 100%);
  /* MOBILE-FIX: Padding damit Box nicht an Bildschirmrand klebt */
  padding: 1rem;
}

.auth-box {
  background: var(--white);
  border-radius: 14px;
  box-shadow: var(--shadow-lg);
  /* MOBILE-FIX: Padding reduziert auf kleinen Screens (via Media Query unten) */
  padding: 2.4rem;
  width: 100%;
  max-width: 400px;
}

.auth-logo {
  text-align: center;
  margin-bottom: 1.5rem;
}
.auth-logo .logo-icon { font-size: 2.5rem; }
.auth-logo h1 { color: var(--navy); margin-top: .3rem; font-size: 1.5rem; }
/* MOBILE-FIX: mind. 16px */
.auth-logo p  { color: var(--gray-600); font-size: 1rem; margin-top: .2rem; }

/* Tabs */
.tabs {
  display: flex;
  gap: .5rem;
  margin-bottom: 1.5rem;
  background: var(--gray-200);
  border-radius: 8px;
  padding: .3rem;
}
/* MOBILE-FIX: Tab-Buttons mind. 44px Tap-Target */
.tab-btn {
  flex: 1;
  padding: .65rem .5rem;
  background: transparent;
  border: none;
  border-radius: 6px;
  font-size: .9rem;
  font-weight: 600;
  color: var(--gray-600);
  cursor: pointer;
  transition: all var(--trans);
  min-height: 44px; /* MOBILE-FIX: Tap-Target */
  touch-action: manipulation;
}
.tab-btn.active {
  background: var(--white);
  color: var(--navy);
  box-shadow: var(--shadow);
}

/* ── Main Layout ──────────────────────────────────────────────────────────── */
/* MOBILE-FIX: Padding reduziert auf kleinen Screens */
.page-wrapper {
  max-width: 1200px;
  margin: 0 auto;
  padding: 1.8rem 1.5rem;
}

/* MOBILE-FIX: page-header stacked auf kleinen Screens */
.page-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.5rem;
  flex-wrap: wrap; /* MOBILE-FIX: umbrechen statt overflow */
  gap: .75rem;
}

/* ── Project Grid ─────────────────────────────────────────────────────────── */
/* MOBILE-FIX: minmax(280px → eine Spalte auf 360px-Screens) */
.project-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.2rem;
}
.project-grid > * { min-width: 0; }

.project-card {
  background: var(--white);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  border-left: 4px solid var(--accent);
  padding: 1.2rem 1.2rem 1.4rem 1.2rem;
  display: flex;
  flex-direction: column;
  gap: .5rem;
  min-width: 0;
  max-width: 100%;
  box-sizing: border-box;
  overflow: visible;
  transition: box-shadow var(--trans), transform var(--trans);
}
.project-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
}

.project-card-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: .5rem;
}
.project-card-header h3 { color: var(--navy); font-size: 1rem; }

/* MOBILE-FIX: mind. 16px für alle Card-Texte */
.project-desc  { font-size: 1rem;   color: var(--gray-600); }
.project-dates { font-size: .875rem; color: var(--gray-600); }
.project-owner { font-size: .875rem; color: var(--gray-600); }

.project-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  width: 100%;
  max-width: 100%;
  box-sizing: border-box;
  overflow: hidden;
  justify-content: flex-start;
  margin-top: 0.8rem;
  padding-bottom: 2px;
}
.project-actions .btn       { flex: 0 0 auto; white-space: nowrap; min-width: 0; }
.project-actions .btn-danger { flex: 0 0 auto; }

.empty-state {
  grid-column: 1/-1;
  text-align: center;
  padding: 3rem 1rem;
  color: var(--gray-600);
}
.empty-state .empty-icon { font-size: 3rem; margin-bottom: .5rem; }

/* ── New Project Form ─────────────────────────────────────────────────────── */
.new-project-form {
  background: var(--white);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 1.5rem;
  margin-bottom: 2rem;
}

/* ── Gantt Page ───────────────────────────────────────────────────────────── */
.gantt-layout {
  display: flex;
  flex-direction: column;
  height: 100vh;
  overflow: hidden;
}
/* MOBILE-FIX: Gantt-Toolbar umbrechen auf kleinen Screens */
.gantt-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--navy);
  color: var(--white);
  padding: .6rem 1.2rem;
  gap: .75rem;
  flex-shrink: 0;
  flex-wrap: wrap; /* MOBILE-FIX: Buttons umbrechen */
}
.gantt-toolbar h2 { color: var(--white); font-size: 1rem; }
.gantt-toolbar .toolbar-left  { display: flex; align-items: center; gap: .75rem; flex-wrap: wrap; }
.gantt-toolbar .toolbar-right { display: flex; align-items: center; gap: .5rem; flex-wrap: wrap; }
.gantt-toolbar a  { color: rgba(255,255,255,.8); text-decoration: none; font-size: .9rem; }
.gantt-toolbar a:hover { color: var(--white); }

#gantt_here { flex: 1; min-height: 0; }

/* ── Modal ────────────────────────────────────────────────────────────────── */
.modal-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,.5);
  z-index: 1000;
  align-items: center;
  justify-content: center;
  /* MOBILE-FIX: Padding damit Modal nicht über Rand geht */
  padding: 1rem;
  overflow-y: auto; /* MOBILE-FIX: Scrollbares Overlay bei langem Inhalt */
}
.modal-overlay.open { display: flex; }

.modal {
  background: var(--white);
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
  padding: 1.8rem;
  width: 100%;
  max-width: 480px;
  /* MOBILE-FIX: Modal scrollt wenn zu lang */
  max-height: 90vh;
  overflow-y: auto;
  margin: auto; /* MOBILE-FIX: Zentriert auch bei overflow-y:auto */
}
.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.2rem;
}
/* MOBILE-FIX: Schließen-Button 44×44px Tap-Target */
.modal-close {
  background: none;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
  color: var(--gray-600);
  line-height: 1;
  min-width: 44px;
  min-height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 6px;
  touch-action: manipulation;
}
.modal-close:hover { color: var(--red); background: var(--gray-100); }
.modal-footer {
  display: flex;
  gap: .75rem;
  justify-content: flex-end;
  margin-top: 1.4rem;
  /* MOBILE-FIX: Buttons umbrechen auf sehr kleinen Screens */
  flex-wrap: wrap;
}

/* ── Loading Spinner ──────────────────────────────────────────────────────── */
.spinner {
  display: inline-block;
  width: 1.2rem;
  height: 1.2rem;
  border: 2px solid rgba(255,255,255,.3);
  border-top-color: var(--white);
  border-radius: 50%;
  animation: spin .7s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ── Utility ──────────────────────────────────────────────────────────────── */
.d-none { display: none !important; }
/* MOBILE-FIX: mind. 16px */
.text-muted { color: var(--gray-600); font-size: 1rem; }
.mt-1 { margin-top: .5rem; }
.mt-2 { margin-top: 1rem; }
.gap-1 { gap: .5rem; }
.flex { display: flex; }
.flex-center { display: flex; align-items: center; justify-content: center; }

/* ── Role Badges ──────────────────────────────────────────────────────────── */
.role-badge {
  display: inline-block;
  padding: 2px 10px;
  border-radius: 20px;
  font-size: .76em;
  font-weight: 700;
  letter-spacing: .02em;
}
.role-admin   { background: #fee2e2; color: #b91c1c; }
.role-teacher { background: #fef3c7; color: #92400e; }
.role-student { background: #dbeafe; color: #1e40af; }

/* ══════════════════════════════════════════════════════════════════════════
   MEDIA QUERIES — Breakpoint 768px (Tablet)
   ══════════════════════════════════════════════════════════════════════════ */
@media (max-width: 768px) {

  /* MOBILE-FIX: Navbar erhält relative Position für absolutes Dropdown */
  .navbar { position: sticky; }

  /* MOBILE-FIX: Seiten-Padding reduzieren */
  .page-wrapper { padding: 1.2rem 1rem; }

  /* MOBILE-FIX: page-header vertikal stapeln */
  .page-header { flex-direction: column; align-items: flex-start; }

  /* MOBILE-FIX: Projekt-Grid eine Spalte */
  .project-grid {
    grid-template-columns: 1fr;
  }

  /* MOBILE-FIX: Modal nimmt fast volle Breite */
  .modal { padding: 1.2rem; }

  /* MOBILE-FIX: Modal-Footer Buttons volle Breite */
  .modal-footer .btn { flex: 1; }

  /* MOBILE-FIX: Gantt-Toolbar kompakter */
  .gantt-toolbar { padding: .5rem .75rem; }
  .gantt-toolbar h2 { font-size: .9rem; }

  /* MOBILE-FIX: Auth-Box weniger Padding */
  .auth-box { padding: 1.5rem 1.2rem; }
}

/* ══════════════════════════════════════════════════════════════════════════
   MEDIA QUERIES — Breakpoint 480px (Smartphone)
   ══════════════════════════════════════════════════════════════════════════ */
@media (max-width: 480px) {

  /* MOBILE-FIX: h1 kleiner damit es nicht umbrechen muss */
  h1 { font-size: 1.3rem; }
  h2 { font-size: 1.1rem; }

  /* MOBILE-FIX: Seiten-Padding minimal */
  .page-wrapper { padding: 1rem .75rem; }

  /* MOBILE-FIX: Auth-Box nimmt volle Breite */
  .auth-box { padding: 1.2rem 1rem; border-radius: 10px; }

  /* MOBILE-FIX: Karten bekommen weniger Padding → mehr Inhalt sichtbar */
  .card, .project-card, .new-project-form { padding: 1rem; }

  /* MOBILE-FIX: Buttons in page-header volle Breite */
  .page-header > div:last-child { width: 100%; }
  .page-header > div:last-child .btn { flex: 1; justify-content: center; }

  /* MOBILE-FIX: form-row auf 480px einspaltig */
  .form-row { grid-template-columns: 1fr; }

  /* MOBILE-FIX: Gantt Toolbar zweizeilig */
  .gantt-toolbar {
    flex-direction: column;
    align-items: flex-start;
    gap: .5rem;
  }
  .gantt-toolbar .toolbar-left,
  .gantt-toolbar .toolbar-right {
    width: 100%;
  }

  /* MOBILE-FIX: Modal fast Vollbild */
  .modal {
    padding: 1rem;
    border-radius: 8px;
    max-height: 85vh;
  }

  /* MOBILE-FIX: project-actions Buttons etwas größer für Touch */
  .project-actions .btn-sm {
    padding: .5rem .7rem;
    font-size: .82rem;
  }

  /* MOBILE-FIX: Navbar-Brand kürzer */
  .navbar-brand .brand-text { display: none; } /* Optional: nur Icon zeigen */
}