:root {
  --green: #a9d8bb;
  --green-light: #e7f5ec;
  --green-dark: #5fa47a;
  --white: #ffffff;
  --off-white: #fbfdfc;
  --text: #2e332f;
  --muted: #6b706c;
  --shadow: rgba(60, 90, 70, 0.08);
  --shadow-strong: rgba(60, 90, 70, 0.16);
}

* { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
  background: var(--off-white);
  color: var(--text);
  line-height: 1.6;
}

.navbar {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(255,255,255,0.9);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--green-light);
}

.nav-inner {
  max-width: 1100px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 24px;
}

.logo {
  font-weight: 700;
  font-size: 1.15rem;
  color: var(--green-dark);
  text-decoration: none;
}

.nav-links {
  display: flex;
  gap: 28px;
}

.nav-links a {
  text-decoration: none;
  color: var(--text);
  font-weight: 600;
  font-size: 0.95rem;
  padding: 6px 4px;
  border-bottom: 2px solid transparent;
  transition: border-color 0.2s ease, color 0.2s ease;
}

.nav-links a:hover {
  color: var(--green-dark);
  border-bottom-color: var(--green);
}

.hero {
  position: relative;
  text-align: center;
  padding: 90px 20px 70px;
  background: radial-gradient(circle at 50% 0%, var(--green-light) 0%, var(--white) 70%);
  overflow: hidden;
}

.hero.small { padding: 60px 20px 40px; }

.hero-deco {
  position: absolute;
  width: 260px;
  height: 260px;
  border-radius: 50%;
  background: radial-gradient(circle, var(--green-light) 0%, transparent 70%);
  opacity: 0.7;
  z-index: 0;
}

.hero-deco.top { top: -120px; left: -80px; }
.hero-deco.bottom { bottom: -140px; right: -90px; }

.hero h1 {
  position: relative;
  font-size: 2.8rem;
  font-weight: 700;
  color: var(--text);
  letter-spacing: 0.5px;
  z-index: 1;
}

.subtitle {
  position: relative;
  margin-top: 12px;
  font-size: 1.1rem;
  color: var(--muted);
  z-index: 1;
}

.counter-box {
  position: relative;
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  margin-top: 36px;
  background: var(--white);
  border: 2px solid var(--green);
  border-radius: 24px;
  padding: 20px 48px;
  box-shadow: 0 6px 20px var(--shadow);
  z-index: 1;
}

#counterNumber {
  font-size: 2.6rem;
  font-weight: 800;
  color: var(--green-dark);
}

.counter-label {
  font-size: 0.82rem;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.8px;
  margin-top: 6px;
}

.task-grid {
  max-width: 1100px;
  margin: 60px auto;
  padding: 0 24px;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 24px;
}

.task-card {
  position: relative;
  background: var(--white);
  border-radius: 18px;
  padding: 30px 22px 26px;
  box-shadow: 0 4px 14px var(--shadow);
  border: 1px solid var(--green-light);
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
}

.task-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 12px 26px var(--shadow-strong);
  border-color: var(--green);
}

.task-badge {
  width: 52px;
  height: 52px;
  border-radius: 50%;
  background: var(--green-light);
  color: var(--green-dark);
  font-weight: 800;
  font-size: 1.15rem;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 14px;
}

.task-text {
  font-size: 1.05rem;
  font-weight: 600;
  margin-bottom: 20px;
}

.upload-btn {
  display: inline-block;
  text-align: center;
  background: var(--green);
  color: var(--text);
  font-weight: 700;
  padding: 10px 20px;
  border-radius: 12px;
  text-decoration: none;
  transition: background 0.2s ease, color 0.2s ease, transform 0.2s ease;
}

.upload-btn:hover {
  background: var(--green-dark);
  color: var(--white);
  transform: scale(1.04);
}

.page-content {
  max-width: 900px;
  margin: 50px auto 70px;
  padding: 0 24px;
  display: flex;
  justify-content: center;
}

.image-frame {
  background: var(--white);
  border: 2px solid var(--green-light);
  border-radius: 20px;
  padding: 16px;
  box-shadow: 0 6px 20px var(--shadow);
}

.page-image {
  max-width: 100%;
  border-radius: 12px;
  display: block;
}

footer {
  text-align: center;
  padding: 40px 20px;
  color: var(--muted);
  font-size: 0.95rem;
}

@media (max-width: 600px) {
  .nav-links { gap: 14px; }
  .hero h1 { font-size: 2.1rem; }
}

/* ===== Mobile Navigation ===== */
.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 6px;
}

.nav-toggle .bar {
  display: block;
  width: 24px;
  height: 3px;
  margin: 5px 0;
  background: var(--green-dark);
  border-radius: 2px;
  transition: transform 0.25s ease, opacity 0.25s ease;
}

@media (max-width: 640px) {
  .nav-toggle { display: block; }

  .nav-links {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    background: var(--white);
    border-bottom: 1px solid var(--green-light);
    box-shadow: 0 8px 16px var(--shadow);
    max-height: 0;
    overflow: hidden;
    gap: 0;
    transition: max-height 0.3s ease;
  }

  .nav-links.open { max-height: 300px; }

  .nav-links a {
    padding: 16px 24px;
    border-bottom: 1px solid var(--green-light);
    width: 100%;
  }

  .nav-links a:last-child { border-bottom: none; }

  .nav-inner { position: relative; padding: 14px 20px; }
  .hero h1 { font-size: 2rem; }
  .subtitle { font-size: 1rem; padding: 0 10px; }
  .counter-box { padding: 16px 28px; }
  #counterNumber { font-size: 2rem; }
  .task-grid { grid-template-columns: 1fr; gap: 16px; margin: 36px auto; }
  .task-card { padding: 24px 18px 20px; }
  .page-content { margin: 30px auto 50px; padding: 0 14px; }
  .image-frame { padding: 10px; }
}

@media (max-width: 400px) {
  .hero h1 { font-size: 1.7rem; }
}

/* ===== Mobile Navigation ===== */
.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 6px;
}

.nav-toggle .bar {
  display: block;
  width: 24px;
  height: 3px;
  margin: 5px 0;
  background: var(--green-dark);
  border-radius: 2px;
  transition: transform 0.25s ease, opacity 0.25s ease;
}

@media (max-width: 640px) {
  .nav-toggle { display: block; }

  .nav-links {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    background: var(--white);
    border-bottom: 1px solid var(--green-light);
    box-shadow: 0 8px 16px var(--shadow);
    max-height: 0;
    overflow: hidden;
    gap: 0;
    transition: max-height 0.3s ease;
  }

  .nav-links.open { max-height: 300px; }

  .nav-links a {
    padding: 16px 24px;
    border-bottom: 1px solid var(--green-light);
    width: 100%;
  }

  .nav-links a:last-child { border-bottom: none; }

  .nav-inner { position: relative; padding: 14px 20px; }
  .hero h1 { font-size: 2rem; }
  .subtitle { font-size: 1rem; padding: 0 10px; }
  .counter-box { padding: 16px 28px; }
  #counterNumber { font-size: 2rem; }
  .task-grid { grid-template-columns: 1fr; gap: 16px; margin: 36px auto; }
  .task-card { padding: 24px 18px 20px; }
  .page-content { margin: 30px auto 50px; padding: 0 14px; }
  .image-frame { padding: 10px; }
}

@media (max-width: 400px) {
  .hero h1 { font-size: 1.7rem; }
}

/* ===== Direkt-Upload Status ===== */
.upload-btn.uploading {
  background: #d9d9d9;
  color: #666;
  cursor: wait;
  pointer-events: none;
}

.upload-btn.done {
  background: var(--green-dark);
  color: var(--white);
}

.upload-status {
  margin-top: 10px;
  font-size: 0.85rem;
  min-height: 18px;
}

.upload-status.success {
  color: var(--green-dark);
  font-weight: 600;
}

.upload-status.error {
  color: #c0392b;
}

/* ===== Persönlicher Fortschritt ===== */
.task-card.completed {
  border-color: var(--green-dark);
  background: var(--green-light);
}

.task-card.completed .task-badge {
  background: var(--green-dark);
  color: var(--white);
}

/* ===== Footer Einstellungen Link ===== */
.admin-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--muted);
  font-size: 0.85rem;
  text-decoration: none;
  opacity: 0.7;
  transition: opacity 0.2s ease;
}

.admin-link:hover {
  opacity: 1;
}

/* ===== Persönlicher Fortschrittszähler ===== */
.personal-progress {
  position: relative;
  margin-top: 18px;
  font-size: 0.95rem;
  color: var(--muted);
  z-index: 1;
}

.personal-progress #personalName,
.personal-progress #personalCount {
  font-weight: 700;
  color: var(--green-dark);
}

/* ===== Konfetti-Animation ===== */
.confetti-container {
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  pointer-events: none;
  z-index: 2000;
  overflow: hidden;
}

.confetti-piece {
  position: absolute;
  top: -20px;
  border-radius: 2px;
  opacity: 0.9;
  animation-name: confetti-fall;
  animation-timing-function: ease-in;
  animation-fill-mode: forwards;
}

@keyframes confetti-fall {
  0% {
    transform: translateY(0) rotate(0deg);
    opacity: 1;
  }
  100% {
    transform: translateY(105vh) rotate(720deg);
    opacity: 0.3;
  }
}

.confetti-message {
  position: fixed;
  top: 40%;
  left: 50%;
  transform: translate(-50%, -50%);
  background: rgba(255, 255, 255, 0.95);
  color: var(--green-dark);
  font-size: 1.4rem;
  font-weight: 800;
  padding: 16px 28px;
  border-radius: 16px;
  box-shadow: 0 8px 24px rgba(0,0,0,0.2);
  animation: confetti-message-pop 0.4s ease-out, confetti-message-fade 0.5s ease-in 3.2s forwards;
  text-align: center;
  white-space: nowrap;
}

@keyframes confetti-message-pop {
  0% { transform: translate(-50%, -50%) scale(0.6); opacity: 0; }
  100% { transform: translate(-50%, -50%) scale(1); opacity: 1; }
}

@keyframes confetti-message-fade {
  0% { opacity: 1; }
  100% { opacity: 0; }
}

/* ===== Live-Leaderboard auf der Hauptseite ===== */
.leaderboard-section {
  max-width: 700px;
  margin: 0 auto 30px;
  padding: 0 20px;
  text-align: center;
}

.leaderboard-section h2 {
  font-size: 1.3rem;
  color: var(--green-dark);
  margin-bottom: 14px;
}

.leaderboard-frame {
  padding: 16px;
}

.leaderboard-row {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 8px;
  border-bottom: 1px solid var(--green-light);
}
.leaderboard-row:last-child {
  border-bottom: none;
}
.leaderboard-rank {
  font-size: 1.1rem;
  font-weight: 800;
  width: 32px;
  text-align: center;
  flex-shrink: 0;
}
.leaderboard-name {
  flex: 1;
  font-weight: 600;
  font-size: 0.95rem;
  text-align: left;
}
.leaderboard-score {
  font-weight: 700;
  color: var(--green-dark);
  font-size: 0.85rem;
  flex-shrink: 0;
}
.leaderboard-row.rank-1 {
  background: linear-gradient(90deg, rgba(242, 217, 141, 0.25), transparent);
}
.leaderboard-row.rank-2 {
  background: linear-gradient(90deg, rgba(200, 200, 200, 0.2), transparent);
}
.leaderboard-row.rank-3 {
  background: linear-gradient(90deg, rgba(214, 158, 110, 0.2), transparent);
}
.leaderboard-bar-bg {
  flex-shrink: 0;
  width: 60px;
  height: 7px;
  background: var(--off-white);
  border-radius: 6px;
  overflow: hidden;
}
.leaderboard-bar-fill {
  height: 100%;
  background: var(--green-dark);
  border-radius: 6px;
}

/* ===== Dark Mode ===== */
:root {
  --transition-theme: background-color 0.3s ease, color 0.3s ease, border-color 0.3s ease;
}

body {
  transition: var(--transition-theme);
}

body.dark-mode {
  --off-white: #1e2420;
  --green-dark: #a3c9a8;
  --green-light: #2f3830;
  --muted: #9aa79a;
  background-color: #141815;
  color: #e8ede8;
}

body.dark-mode .navbar {
  background-color: #1a201c;
  border-bottom: 1px solid #2f3830;
}

body.dark-mode .nav-links a {
  color: #e8ede8;
}

body.dark-mode .hero {
  background: linear-gradient(135deg, #1a201c, #141815);
}

body.dark-mode .counter-box,
body.dark-mode .image-frame,
body.dark-mode .task-card,
body.dark-mode .leaderboard-frame {
  background-color: #1e2420;
  border-color: #2f3830;
  color: #e8ede8;
}

body.dark-mode .task-badge {
  background-color: #2f3830;
  color: #a3c9a8;
}

body.dark-mode .upload-btn {
  background-color: #3d5c3a;
  color: #e8ede8;
}

body.dark-mode footer {
  background-color: #1a201c;
  color: #9aa79a;
}

body.dark-mode .leaderboard-row {
  border-bottom-color: #2f3830;
}

.theme-toggle-float {
  position: fixed;
  bottom: 24px;
  right: 24px;
  width: 52px;
  height: 52px;
  border-radius: 50%;
  background-color: var(--off-white);
  border: 1px solid var(--green-light);
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.15);
  cursor: pointer;
  font-size: 1.4rem;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  transition: background-color 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease;
}

.theme-toggle-float:hover {
  transform: scale(1.08);
  box-shadow: 0 6px 18px rgba(0, 0, 0, 0.2);
}

.theme-toggle-float:active {
  transform: scale(0.95);
}

body.dark-mode .theme-toggle-float {
  background-color: #1e2420;
  border-color: #2f3830;
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.4);
}

@media (max-width: 480px) {
  .theme-toggle-float {
    bottom: 18px;
    right: 18px;
    width: 46px;
    height: 46px;
    font-size: 1.2rem;
  }
}