/* ============================================================
   ClassKarma – Globales Stylesheet
   Design: Warm & Freundlich, inspiriert von Felt-Art Classroom
   Palette: Warm White · Sky Blue · Sandy Beige · Golden Yellow
   ============================================================ */

@import url('fonts.css');

/* --- Design Tokens --- */
:root {
  /* Colors */
  --clr-bg:          #FBF8F4;
  --clr-bg-2:        #F5EFE6;
  --clr-surface:     #FFFFFF;
  --clr-surface-2:   #F0EBE3;
  --clr-border:      #E0D4C3;
  --clr-border-soft: rgba(180,160,130,0.25);

  /* Sky Blue – primary brand color */
  --clr-primary:     #5BA4CF;
  --clr-primary-h:   #4490BE;
  --clr-primary-lt:  #EBF5FB;
  --clr-primary-m:   rgba(91,164,207,0.15);

  /* Sandy Beige / Golden */
  --clr-gold:        #F5C542;
  --clr-gold-h:      #E0AF2A;
  --clr-gold-lt:     #FEF9E7;

  /* Functional */
  --clr-green:       #52B788;
  --clr-green-lt:    #EDFAF3;
  --clr-red:         #E07070;
  --clr-red-lt:      #FDEAEA;
  --clr-orange:      #F0946A;
  --clr-orange-lt:   #FEF0E9;

  /* Text */
  --clr-text:        #3D3022;
  --clr-text-2:      #6B5A45;
  --clr-text-muted:  #9A8878;
  --clr-text-light:  #C4B8AA;

  /* Roles */
  --clr-student:     #5BA4CF;
  --clr-dozent:      #52B788;
  --clr-admin:       --clr-gold;

  /* Geometry */
  --radius-xs:       6px;
  --radius-sm:       10px;
  --radius-md:       16px;
  --radius-lg:       24px;
  --radius-xl:       32px;
  --radius-round:    50%;

  /* Shadows */
  --shadow-xs:       0 1px 4px rgba(100,80,50,0.08);
  --shadow-sm:       0 2px 10px rgba(100,80,50,0.10);
  --shadow-md:       0 6px 24px rgba(100,80,50,0.12);
  --shadow-lg:       0 16px 48px rgba(100,80,50,0.15);
  --shadow-xl:       0 28px 72px rgba(100,80,50,0.18);

  /* Transitions */
  --ease:            0.22s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  --ease-bounce:     0.35s cubic-bezier(0.34, 1.56, 0.64, 1);

  /* Typography */
  --font-main:       'Nunito', sans-serif;
  --font-sub:        'Quicksand', sans-serif;
}

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

html { font-size: var(--font-size-base, 16px); scroll-behavior: smooth; }

body {
  font-family: var(--font-main);
  background-color: var(--clr-bg);
  color: var(--clr-text);
  line-height: 1.65;
  min-height: 100vh;
}

a {
  color: var(--clr-primary);
  text-decoration: none;
  transition: color var(--ease);
}
a:hover { color: var(--clr-primary-h); }

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

/* ============================================================
   BUTTONS
   ============================================================ */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.45rem;
  font-family: var(--font-main);
  font-size: 0.95rem;
  font-weight: 700;
  padding: 0.65rem 1.4rem;
  border-radius: var(--radius-md);
  cursor: pointer;
  border: none;
  transition: all var(--ease-bounce);
  letter-spacing: 0.01em;
}

.btn-primary {
  background: linear-gradient(135deg, var(--clr-primary), var(--clr-primary-h));
  color: #fff;
  box-shadow: 0 4px 16px rgba(91,164,207,0.35);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(91,164,207,0.45);
}
.btn-primary:active { transform: translateY(0); }

/* Auffälliger Action-Button (orange) für Haupt-CTAs wie "Woche simulieren" */
.btn-action {
  background: linear-gradient(135deg, #F4A261, #E76F51);
  color: #fff;
  box-shadow: 0 4px 16px rgba(231,111,81,0.35);
}
.btn-action:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(231,111,81,0.45);
}
.btn-action:active { transform: translateY(0); }

.btn-secondary {
  background: var(--clr-surface-2);
  color: var(--clr-text-2);
  border: 1.5px solid var(--clr-border);
}
.btn-secondary:hover {
  background: var(--clr-bg-2);
  border-color: var(--clr-primary);
  color: var(--clr-primary);
  transform: translateY(-1px);
}

.btn-gold {
  background: linear-gradient(135deg, var(--clr-gold), var(--clr-gold-h));
  color: #fff;
  box-shadow: 0 4px 16px rgba(245,197,66,0.4);
}
.btn-gold:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(245,197,66,0.5);
}

.btn-full  { width: 100%; margin-top: 0.5rem; }
.btn-sm    { font-size: 0.82rem; padding: 0.45rem 1rem; border-radius: var(--radius-sm); }
.btn-lg    { font-size: 1.05rem; padding: 0.85rem 2rem; border-radius: var(--radius-lg); }

/* ============================================================
   FORM ELEMENTS
   ============================================================ */

.form-group {
  margin-bottom: 1rem;
}

.form-group label {
  display: block;
  font-size: 0.83rem;
  font-weight: 700;
  color: var(--clr-text-2);
  margin-bottom: 0.4rem;
  letter-spacing: 0.02em;
}

.form-group input,
.form-control {
  width: 100%;
  background: var(--clr-surface);
  border: 1.5px solid var(--clr-border);
  border-radius: var(--radius-sm);
  color: var(--clr-text);
  font-family: var(--font-main);
  font-size: 0.975rem;
  font-weight: 500;
  padding: 0.7rem 1rem;
  transition: border-color var(--ease), box-shadow var(--ease), background var(--ease);
  outline: none;
}

.form-group input::placeholder { color: var(--clr-text-light); }

.form-group input:focus,
.form-control:focus {
  border-color: var(--clr-primary);
  background: var(--clr-primary-lt);
  box-shadow: 0 0 0 3px rgba(91,164,207,0.2);
}

.password-wrapper           { position: relative; }
.password-wrapper input     { padding-right: 2.8rem; }

.toggle-pw {
  position: absolute;
  right: 0.75rem;
  top: 50%;
  transform: translateY(-50%);
  background: none;
  border: none;
  cursor: pointer;
  font-size: 1rem;
  opacity: 0.4;
  transition: opacity var(--ease);
}
.toggle-pw:hover { opacity: 0.75; }

/* ============================================================
   ALERTS
   ============================================================ */

.alert {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.8rem 1rem;
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  font-weight: 600;
  margin-bottom: 1rem;
  animation: shake 0.35s ease;
}
.alert-error   { background: var(--clr-red-lt);   border: 1.5px solid rgba(224,112,112,0.3); color: #C05050; }
.alert-success { background: var(--clr-green-lt);  border: 1.5px solid rgba(82,183,136,0.3); color: #3A9970; }

@keyframes shake {
  0%, 100% { transform: translateX(0); }
  25%       { transform: translateX(-5px); }
  75%       { transform: translateX(5px); }
}

/* ============================================================
   BADGES
   ============================================================ */

.badge {
  display: inline-flex;
  align-items: center;
  padding: 0.2rem 0.7rem;
  border-radius: 20px;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.02em;
}
.badge-blue   { background: var(--clr-primary-lt); color: var(--clr-primary-h); }
.badge-green  { background: var(--clr-green-lt);   color: #2E8B63; }
.badge-yellow { background: var(--clr-gold-lt);    color: var(--clr-gold-h); }
.badge-red    { background: var(--clr-red-lt);     color: #C05050; }
.badge-orange { background: var(--clr-orange-lt);  color: #C06835; }

/* Role badges */
.user-role {
  font-size: 0.72rem; font-weight: 700;
  padding: 0.18rem 0.6rem;
  border-radius: 20px;
  display: inline-block;
  margin-top: 0.2rem;
  letter-spacing: 0.01em;
}
.role-student { background: rgba(91,164,207,0.15);  color: #3A80B0; }
.role-dozent  { background: rgba(82,183,136,0.15);  color: #2E8B63; }
.role-admin   { background: rgba(245,197,66,0.15);  color: #B8900A; }

/* ============================================================
   CARDS
   ============================================================ */

.card {
  background: var(--clr-surface);
  border: 1.5px solid var(--clr-border-soft);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--ease), border-color var(--ease), transform var(--ease);
}
.card:hover {
  box-shadow: var(--shadow-md);
  border-color: rgba(91,164,207,0.25);
  transform: translateY(-2px);
}

.card-title {
  font-size: 0.78rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--clr-text-muted);
  margin-bottom: 0.75rem;
}

/* ============================================================
   STAT GRID
   ============================================================ */

.stat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(170px, 1fr));
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.stat-card {
  background: var(--clr-surface);
  border: 1.5px solid var(--clr-border-soft);
  border-radius: var(--radius-lg);
  padding: 1.25rem 1.25rem 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  box-shadow: var(--shadow-xs);
  transition: all var(--ease);
  position: relative;
  overflow: hidden;
}
.stat-card::after {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--clr-primary), var(--clr-gold));
  opacity: 0;
  transition: opacity var(--ease);
}
.stat-card:hover { box-shadow: var(--shadow-md); transform: translateY(-2px); }
.stat-card:hover::after { opacity: 1; }

.stat-icon  { font-size: 1.75rem; }
.stat-value { font-size: 1.75rem; font-weight: 900; color: var(--clr-text); font-family: var(--font-sub); }
.stat-label { font-size: 0.76rem; color: var(--clr-text-muted); font-weight: 600; text-transform: uppercase; letter-spacing: 0.04em; }

/* ============================================================
   APP LAYOUT – SIDEBAR + MAIN
   ============================================================ */

.app-layout {
  display: flex;
  min-height: 100vh;
}

/* Sidebar */
.sidebar {
  width: 260px;
  flex-shrink: 0;
  background: var(--clr-surface);
  border-right: 1.5px solid var(--clr-border-soft);
  display: flex;
  flex-direction: column;
  padding: 1.5rem 0;
  position: sticky;
  top: 0;
  height: 100vh;
  overflow-y: auto;
  box-shadow: var(--shadow-xs);
}

.sidebar-brand {
  padding: 0 1.25rem 1.5rem;
  border-bottom: 1.5px solid var(--clr-border-soft);
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}
.sidebar-brand-logo {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  object-fit: cover;
  flex-shrink: 0;
}
.brand-name {
  font-family: var(--font-main);
  font-size: 1.05rem;
  font-weight: 900;
  color: var(--clr-primary);
  line-height: 1.2;
}
.brand-name span { color: var(--clr-gold-h); }
.brand-version {
  font-size: 0.66rem;
  color: var(--clr-text-muted);
  font-weight: 600;
}

.sidebar-user {
  padding: 0.75rem 1.25rem 1rem;
  border-bottom: 1.5px solid var(--clr-border-soft);
  margin-bottom: 0.75rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
  color: inherit;
  cursor: pointer;
  transition: background .15s;
  border-radius: 0;
}
a.sidebar-user:hover {
  background: rgba(91,164,207,0.07);
}
.sidebar-avatar {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: var(--clr-primary-m);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  flex-shrink: 0;
}
.user-info .user-name { font-size: 0.88rem; font-weight: 800; color: var(--clr-text); }

.sidebar-nav { flex: 1; }

.nav-section-label {
  font-size: 0.64rem;
  font-weight: 800;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--clr-text-light);
  padding: 0.85rem 1.25rem 0.3rem;
  pointer-events: none;
  user-select: none;
}
.nav-item + .nav-section-label {
  margin-top: 0.25rem;
  padding-top: 1rem;
  border-top: 1px solid var(--clr-border-soft);
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  padding: 0.6rem 1.25rem;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--clr-text-muted);
  transition: all var(--ease);
  text-decoration: none;
  border-left: 3px solid transparent;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin-right: 0.5rem;
}
.nav-item:hover {
  background: var(--clr-primary-lt);
  color: var(--clr-primary);
  border-left-color: rgba(91,164,207,0.3);
}
.nav-item.active {
  background: var(--clr-primary-lt);
  color: var(--clr-primary-h);
  border-left-color: var(--clr-primary);
  font-weight: 700;
}
.nav-icon { font-size: 1.1rem; width: 1.25rem; text-align: center; }

.sidebar-footer {
  padding: .75rem 1rem;
  border-top: 1.5px solid var(--clr-border-soft);
  margin-top: auto;
}

/* ── Schriftgröße-Regler (Barrierefreiheit) ── */
.font-size-ctrl {
  display: flex; align-items: center; gap: .4rem;
  padding: .4rem .75rem; margin: .25rem .75rem;
  background: var(--clr-bg-2, #F5EFE6);
  border-radius: var(--radius-sm);
  border: 1px solid var(--clr-border-soft);
}
.font-size-ctrl .fsc-label {
  font-size: .6rem; font-weight: 800; text-transform: uppercase;
  letter-spacing: .05em; color: var(--clr-text-muted);
  margin-right: auto; white-space: nowrap;
}
.font-size-ctrl button {
  width: 26px; height: 26px; border-radius: 50%;
  border: 1.5px solid var(--clr-border);
  background: var(--clr-surface);
  color: var(--clr-text);
  font-size: .75rem; font-weight: 900;
  cursor: pointer; display: flex; align-items: center; justify-content: center;
  transition: all var(--ease);
  padding: 0; line-height: 1;
}
.font-size-ctrl button:hover {
  background: var(--clr-primary-lt);
  border-color: var(--clr-primary);
  color: var(--clr-primary);
}
.font-size-ctrl .fsc-value {
  font-size: .65rem; font-weight: 800; color: var(--clr-text-2);
  min-width: 2.2rem; text-align: center;
  font-family: var(--font-sub);
}

/* Profil-Block unten in der Sidebar (Student) */
.sidebar-user-bottom {
  display: flex; align-items: center; gap: .75rem;
  padding: .6rem .75rem; border-radius: 14px;
  text-decoration: none; color: inherit;
  transition: background .15s;
}
.sidebar-user-bottom:hover,
.sidebar-user-bottom.active { background: rgba(91,164,207,.1); }
.sidebar-avatar-lg {
  width: 48px; height: 48px; border-radius: 50%; flex-shrink: 0;
  background: var(--clr-primary-m);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.6rem; overflow: hidden;
  border: 2px solid rgba(91,164,207,.25);
  box-shadow: 0 2px 8px rgba(91,164,207,.12);
}

/* Mobile hamburger */
.sidebar-toggle {
  display: none;
  position: fixed;
  top: 1rem;
  left: 1rem;
  z-index: 1001;
  background: var(--clr-surface);
  border: 1.5px solid var(--clr-border);
  border-radius: var(--radius-md);
  width: 44px;
  height: 44px;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  cursor: pointer;
  box-shadow: var(--shadow-sm);
}
.sidebar-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(60,40,20,0.4);
  z-index: 999;
  backdrop-filter: blur(2px);
}

/* Main Content */
.main-content {
  flex: 1;
  padding: 2rem 2.25rem;
  overflow-y: auto;
  max-width: 100%;
}

.page-header {
  margin-bottom: 2rem;
}
.page-header h1 {
  font-size: 1.75rem;
  font-weight: 900;
  color: var(--clr-text);
  margin-bottom: 0.3rem;
}
.page-header p {
  color: var(--clr-text-muted);
  font-size: 0.9rem;
  font-weight: 500;
}

/* ============================================================
   LOGIN PAGE
   ============================================================ */

.login-page {
  display: flex;
  justify-content: center;
  min-height: 100vh;
  max-width: 1200px;
  margin: 0 auto;
  background: var(--clr-bg);
  overflow-x: hidden;
  overflow-y: auto;
}

.login-visual {
  flex: 1;
  position: relative;
  display: none;
  max-width: 720px;
  max-height: 100vh;
}
@media (min-width: 900px) { .login-visual { display: block; } }

.login-visual img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.login-visual-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    to right,
    rgba(251,248,244,0) 60%,
    var(--clr-bg) 100%
  );
}

.login-panel {
  width: 100%;
  max-width: 460px;
  flex-shrink: 0;
  padding: 2rem 2.5rem;
  display: flex;
  flex-direction: column;
  justify-content: safe center;
  gap: 1.25rem;
  background: var(--clr-bg);
  position: relative;
  z-index: 1;
  overflow-y: auto;
  max-height: 100vh;
}

.login-brand {
  text-align: center;
  animation: fadeDown 0.6s ease;
}

.login-logo {
  width: 80px;
  height: 80px;
  object-fit: contain;
  margin: 0 auto 0.75rem;
  animation: float 4s ease-in-out infinite;
  filter: drop-shadow(0 4px 12px rgba(91,164,207,0.25));
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50%       { transform: translateY(-8px); }
}

.login-brand h1 {
  font-size: 1.75rem;
  font-weight: 900;
  color: var(--clr-primary);
  letter-spacing: -0.02em;
}
.login-brand h1 span { color: var(--clr-gold-h); }
.login-brand p {
  color: var(--clr-text-muted);
  font-size: 0.875rem;
  font-weight: 600;
  margin-top: 0.2rem;
}

.login-card {
  background: var(--clr-surface);
  border: 1.5px solid var(--clr-border-soft);
  border-radius: var(--radius-xl);
  padding: 2rem 2rem;
  box-shadow: var(--shadow-md);
  animation: fadeUp 0.5s ease 0.1s both;
}

.login-card h2 {
  font-size: 1.2rem;
  font-weight: 800;
  margin-bottom: 0.2rem;
  color: var(--clr-text);
}
.login-subtitle {
  color: var(--clr-text-muted);
  font-size: 0.84rem;
  font-weight: 500;
  margin-bottom: 1.5rem;
}

/* Demo accounts */
.login-demo {
  margin-top: 1.5rem;
  padding-top: 1.25rem;
  border-top: 1.5px solid var(--clr-border-soft);
}
.login-demo p {
  font-size: 0.77rem;
  color: var(--clr-text-muted);
  margin-bottom: 0.6rem;
  text-align: center;
  font-weight: 600;
}
.login-demo code {
  background: var(--clr-primary-lt);
  color: var(--clr-primary-h);
  padding: 0.1rem 0.35rem;
  border-radius: 5px;
  font-size: 0.85em;
}
.demo-accounts {
  display: flex;
  gap: 0.5rem;
}
.demo-btn {
  flex: 1;
  font-family: var(--font-main);
  font-size: 0.72rem;
  font-weight: 700;
  padding: 0.5rem 0.4rem;
  background: var(--clr-bg);
  border: 1.5px solid var(--clr-border);
  border-radius: var(--radius-sm);
  color: var(--clr-text-muted);
  cursor: pointer;
  transition: all var(--ease-bounce);
  text-align: center;
}
.demo-btn:hover {
  background: var(--clr-primary-lt);
  color: var(--clr-primary);
  border-color: var(--clr-primary);
  transform: translateY(-2px);
  box-shadow: var(--shadow-xs);
}

.login-footer {
  display: flex;
  gap: 0.75rem;
  align-items: center;
  justify-content: center;
  font-size: 0.78rem;
  color: var(--clr-text-muted);
  animation: fadeUp 0.5s ease 0.3s both;
  font-weight: 500;
}
.login-footer span { opacity: 0.4; }
.login-footer a { font-weight: 600; }

.login-legal {
  position: absolute;
  bottom: 0.8rem;
  left: 0;
  right: 0;
  display: flex;
  gap: 0.75rem;
  align-items: center;
  justify-content: center;
  font-size: 0.72rem;
  color: #1B3A5C;
  font-weight: 600;
  padding: 0.5rem 1rem;
  background: transparent;
  z-index: 5;
}
.login-legal span { opacity: 0.5; color: #1B3A5C; }
.login-legal a { font-weight: 700; color: #1B3A5C; text-decoration: none; }
.login-legal a:hover { text-decoration: underline; }
@media (max-width: 899px) {
  .login-legal-mobile {
    display: flex;
    gap: 0.75rem;
    align-items: center;
    justify-content: center;
    font-size: 0.72rem;
    color: var(--clr-text-muted);
    font-weight: 600;
    padding: 0.4rem 0;
  }
  .login-legal-mobile span { opacity: 0.4; }
  .login-legal-mobile a { font-weight: 700; color: var(--clr-text-muted); text-decoration: none; }
  .login-legal-mobile a:hover { text-decoration: underline; }
}
@media (min-width: 900px) {
  .login-legal-mobile { display: none; }
}

/* ============================================================
   ANIMATIONS (global)
   ============================================================ */

@keyframes fadeDown {
  from { opacity: 0; transform: translateY(-20px); }
  to   { opacity: 1; transform: translateY(0); }
}
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(20px); }
  to   { opacity: 1; transform: translateY(0); }
}
@keyframes fadeIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}
@keyframes scaleIn {
  from { opacity: 0; transform: scale(0.94); }
  to   { opacity: 1; transform: scale(1); }
}

.anim-fade-up   { animation: fadeUp 0.5s ease both; }
.anim-fade-down { animation: fadeDown 0.5s ease both; }
.anim-scale-in  { animation: scaleIn 0.4s ease both; }

/* Stagger helper */
.stagger-1 { animation-delay: 0.05s; }
.stagger-2 { animation-delay: 0.10s; }
.stagger-3 { animation-delay: 0.15s; }
.stagger-4 { animation-delay: 0.20s; }

/* ============================================================
   UTILITY
   ============================================================ */

.text-muted   { color: var(--clr-text-muted); }
.text-primary { color: var(--clr-primary); }
.text-gold    { color: var(--clr-gold-h); }
.text-green   { color: #2E8B63; }
.text-center  { text-align: center; }

.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }

/* ============================================================
   RESPONSIVE
   ============================================================ */

@media (max-width: 768px) {
  .sidebar {
    position: fixed;
    left: -280px;
    z-index: 1000;
    transition: left 0.3s ease;
    width: 260px;
  }
  .sidebar.is-open { left: 0; }
  .sidebar-overlay.is-open { display: block; }
  .sidebar-toggle { display: flex; }

  .main-content { padding: 1.25rem 1rem; padding-top: 4rem; }
  .stat-grid { grid-template-columns: 1fr 1fr; }

  .login-panel { padding: 1.5rem 1.25rem; max-width: 100%; }
  .login-card  { padding: 1.25rem; }
}

@media (max-width: 400px) {
  .stat-grid { grid-template-columns: 1fr; }
  .demo-accounts { flex-direction: column; }
}

/* Login-Seite: Bei niedriger Höhe Inhalte nach oben, kompakter */
@media (max-height: 700px) {
  .login-panel {
    justify-content: flex-start;
    padding-top: 1rem;
    gap: 0.75rem;
  }
  .login-brand { margin-bottom: 0; }
  .login-logo { width: 56px; height: 56px; margin-bottom: 0.4rem; }
  .login-brand h1 { font-size: 1.4rem; }
  .login-card { padding: 1.25rem; }
  .login-card h2 { font-size: 1.05rem; }
  .form-group { margin-bottom: 0.6rem; }
}

/* ============================================================
   Theorie-Chip – wissenschaftlicher Hinweis-Button
   Verwendung: <button class="theorie-chip" data-theorie="selbstregulation">🔬 Theorie</button>
   ============================================================ */
.theorie-chip {
  display: inline-flex;
  align-items: center;
  gap: .25rem;
  background: rgba(91,164,207,.1);
  border: 1.5px solid rgba(91,164,207,.35);
  border-radius: 20px;
  padding: .18rem .6rem;
  font-size: .72rem;
  font-weight: 800;
  color: #2E72A8;
  cursor: pointer;
  font-family: 'Nunito', sans-serif;
  vertical-align: middle;
  transition: background .18s, transform .15s;
  white-space: nowrap;
}
.theorie-chip:hover {
  background: rgba(91,164,207,.2);
  transform: scale(1.05);
}

/* Theorie-Tooltip Popover */
.theorie-tooltip {
  position: absolute;
  z-index: 9900;
  background: #fff;
  border: 1.5px solid rgba(91,164,207,.4);
  border-radius: 16px;
  padding: 1rem 1.15rem 1rem;
  max-width: 300px;
  min-width: 220px;
  box-shadow: 0 8px 32px rgba(60,40,20,.18);
  animation: fadeInUp .16s ease;
}
.tt-header {
  display: flex;
  align-items: center;
  gap: .45rem;
  margin-bottom: .55rem;
}
.tt-icon   { font-size: 1.15rem; flex-shrink: 0; }
.tt-titel  { font-size: .88rem; font-weight: 800; color: var(--clr-text, #3D3022); flex: 1; line-height: 1.2; }
.tt-close  {
  background: none; border: none; cursor: pointer;
  font-size: .9rem; color: var(--clr-text-muted, #9A8878);
  padding: 0; line-height: 1; flex-shrink: 0; opacity: .7;
}
.tt-close:hover { opacity: 1; }
.tt-text   {
  font-size: .82rem; color: var(--clr-text-2, #6B5A45);
  font-family: 'Quicksand', sans-serif; font-weight: 500;
  line-height: 1.55; margin-bottom: .6rem;
}
.tt-quelle {
  font-size: .71rem; font-weight: 700;
  color: var(--clr-primary, #5BA4CF);
  font-style: italic;
  border-top: 1px solid var(--clr-border, #E0D4C3);
  padding-top: .45rem;
  line-height: 1.4;
}
.tt-link {
  display: inline-block;
  margin-top: .5rem;
  font-size: .72rem;
  font-weight: 800;
  color: var(--clr-primary, #5BA4CF);
  text-decoration: none;
  background: var(--clr-primary-lt, #EBF5FB);
  border: 1px solid rgba(91,164,207,.3);
  border-radius: 8px;
  padding: .2rem .6rem;
  transition: background .15s;
}
.tt-link:hover { background: rgba(91,164,207,.2); }

/* Spieltyp-Badge im Onboarding */
.spiel-typ-badge {
  display: inline-flex;
  align-items: center;
  gap: .3rem;
  font-size: .72rem;
  font-weight: 800;
  padding: .2rem .65rem;
  border-radius: 20px;
  white-space: nowrap;
}
.stb-frei    { background: #EBF5FB; color: #2E72A8; border: 1.5px solid rgba(91,164,207,.35); }
.stb-pflicht { background: #EDFAF3; color: #2E8B63; border: 1.5px solid rgba(82,183,136,.35); }

/* Spielmodus-Box */
.spielmodus-box {
  border: 1.5px solid var(--clr-border, #E0D4C3);
  border-radius: 16px;
  padding: 1rem 1.25rem;
  margin-bottom: 1.25rem;
  background: var(--clr-bg-2, #F5EFE6);
}
.spielmodus-box h4 {
  font-size: .88rem;
  font-weight: 900;
  margin-bottom: .25rem;
  display: flex;
  align-items: center;
  gap: .5rem;
}
.spielmodus-box p {
  font-size: .82rem;
  color: var(--clr-text-2, #6B5A45);
  font-family: 'Quicksand', sans-serif;
  margin: 0;
}

/* ── Info-Tooltip ────────────────────────────── */
.info-tip {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 16px; height: 16px;
  border-radius: 50%;
  background: var(--clr-primary-lt, #EBF5FB);
  color: var(--clr-primary, #5BA4CF);
  font-size: .65rem;
  font-weight: 800;
  cursor: help;
  flex-shrink: 0;
  vertical-align: middle;
  margin-left: .25rem;
  border: 1px solid rgba(91,164,207,.3);
  transition: background .2s, color .2s;
  line-height: 1;
}
.info-tip:hover {
  background: var(--clr-primary, #5BA4CF);
  color: #fff;
}
.info-tip .info-pop {
  display: none;
  position: absolute;
  bottom: calc(100% + 8px);
  left: 50%;
  transform: translateX(-50%);
  width: 240px;
  padding: .65rem .85rem;
  background: var(--clr-surface, #fff);
  color: var(--clr-text, #3D3022);
  font-size: .78rem;
  font-weight: 500;
  font-family: 'Nunito', sans-serif;
  line-height: 1.45;
  border-radius: 10px;
  border: 1.5px solid var(--clr-border, #E0D4C3);
  box-shadow: 0 6px 20px rgba(100,80,50,.15);
  z-index: 100;
  text-align: left;
  cursor: default;
  pointer-events: none;
}
.info-tip .info-pop::after {
  content: '';
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%);
  border: 6px solid transparent;
  border-top-color: var(--clr-border, #E0D4C3);
}
.info-tip:hover .info-pop,
.info-tip:focus .info-pop {
  display: block;
}
/* Flip tooltip to bottom if near top edge */
.info-tip.info-tip-down .info-pop {
  bottom: auto;
  top: calc(100% + 8px);
}
.info-tip.info-tip-down .info-pop::after {
  top: auto;
  bottom: 100%;
  border-top-color: transparent;
  border-bottom-color: var(--clr-border, #E0D4C3);
}

/* ============================================================
   Barrierefreiheit / Accessibility
   ============================================================ */

/* ── Screen-Reader Only ── */
.sr-only {
  position: absolute; width: 1px; height: 1px;
  padding: 0; margin: -1px; overflow: hidden;
  clip: rect(0,0,0,0); white-space: nowrap; border: 0;
}

/* ── Skip-to-Content Link ── */
.skip-link {
  position: absolute; top: -100%; left: 1rem;
  background: var(--clr-primary); color: #fff;
  padding: .6rem 1.2rem; border-radius: 0 0 var(--radius-sm) var(--radius-sm);
  font-weight: 800; font-size: .85rem; z-index: 9999;
  text-decoration: none; transition: top .2s;
}
.skip-link:focus {
  top: 0;
}

/* ── Focus-Visible (Keyboard only) ── */
:focus-visible {
  outline: 3px solid var(--clr-primary);
  outline-offset: 2px;
}
:focus:not(:focus-visible) {
  outline: none;
}
/* Buttons und Links mit sichtbarem Keyboard-Focus */
a:focus-visible,
button:focus-visible,
[tabindex]:focus-visible {
  outline: 3px solid var(--clr-primary);
  outline-offset: 2px;
  border-radius: var(--radius-xs);
}

/* ── Reduced Motion ── */
@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;
  }
}

/* ── High Contrast Mode ── */
@media (prefers-contrast: more) {
  :root {
    --clr-bg:        #FFFFFF;
    --clr-bg-2:      #F0F0F0;
    --clr-surface:   #FFFFFF;
    --clr-border:    #333333;
    --clr-text:      #000000;
    --clr-text-2:    #222222;
    --clr-text-muted:#444444;
  }
  .card, .iv-card, .sidebar {
    border-width: 2px;
  }
  .btn, .nav-item, a {
    text-decoration-thickness: 2px;
  }
}