body {
  font-family: 'Arial', sans-serif;
  background: linear-gradient(135deg, #0f4c3a, #1e6b52, #2d5016);
  color: #f8f8f8;
  margin: 0;
  padding: 20px;
  min-height: 100vh;
}

.container {
  max-width: 800px;
  margin: 0 auto;
  text-align: center;
}

h1 {
  font-size: 2.5em;
  margin-bottom: 10px;
  text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
  color: #ffd700;
}

h2 {
  font-size: 1.5em;
  margin-bottom: 20px;
  color: #ff6b6b;
  text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.3);
}

.calendar-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 15px;
  margin: 30px 0;
  max-width: 500px;
  margin-left: auto;
  margin-right: auto;
}

.calendar-day {
  width: 80px;
  height: 80px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5em;
  font-weight: bold;
  transition: transform 0.3s ease;
  border: 2px solid #ffd700;
}

.calendar-day.available {
  background: linear-gradient(45deg, #c41e3a, #8b0000);
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.3), 0 0 15px rgba(255, 215, 0, 0.2);
}

.calendar-day.birthday {
  background: linear-gradient(45deg, #ffd700, #ffb347);
  box-shadow: 0 4px 12px rgba(255, 215, 0, 0.6);
  animation: birthday-glow 2s ease-in-out infinite alternate;
  border-color: #ff6b6b;
}

.calendar-day.exam-day {
  background: linear-gradient(45deg, #228b22, #006400);
  box-shadow: 0 4px 12px rgba(34, 139, 34, 0.5);
  animation: exam-pulse 3s ease-in-out infinite;
  border-color: #ffd700;
}

@keyframes birthday-glow {
  from {
    box-shadow: 0 4px 12px rgba(255, 215, 0, 0.6), 0 0 20px rgba(255, 107, 107, 0.4);
  }

  to {
    box-shadow: 0 6px 20px rgba(255, 215, 0, 0.9), 0 0 30px rgba(255, 107, 107, 0.7);
  }
}

@keyframes exam-pulse {

  0%,
  100% {
    box-shadow: 0 4px 12px rgba(34, 139, 34, 0.5), 0 0 15px rgba(255, 215, 0, 0.3);
  }

  50% {
    box-shadow: 0 6px 16px rgba(34, 139, 34, 0.8), 0 0 25px rgba(255, 215, 0, 0.5);
  }
}

.calendar-day.available:hover,
.calendar-day.birthday:hover,
.calendar-day.exam-day:hover {
  transform: scale(1.1);
  box-shadow: 0 6px 12px rgba(0, 0, 0, 0.4), 0 0 20px rgba(255, 215, 0, 0.4);
}

.calendar-day.available a,
.calendar-day.birthday a,
.calendar-day.exam-day a {
  color: white;
  text-decoration: none;
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.7);
}

.calendar-day.locked {
  background: linear-gradient(45deg, #2f4f2f, #1c3a1c);
  color: #888;
  border-color: #555;
}

.locked-day {
  cursor: not-allowed;
}

.important-dates {
  background: linear-gradient(135deg, rgba(196, 30, 58, 0.2), rgba(34, 139, 34, 0.2));
  padding: 20px;
  border-radius: 15px;
  margin: 30px 0;
  backdrop-filter: blur(10px);
  border: 2px solid rgba(255, 215, 0, 0.3);
}

.important-dates h3 {
  color: #ffd700;
  margin-bottom: 15px;
  text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.5);
}

.important-dates p {
  margin: 8px 0;
  font-size: 1.1em;
  color: #f0f0f0;
}

.surprise-content {
  background: linear-gradient(135deg, rgba(196, 30, 58, 0.15), rgba(34, 139, 34, 0.15));
  padding: 30px;
  border-radius: 15px;
  margin: 20px 0;
  backdrop-filter: blur(10px);
  line-height: 1.6;
  border: 2px solid rgba(255, 215, 0, 0.2);
}

.surprise-content p {
  margin: 15px 0;
  font-size: 1.1em;
  color: #f0f0f0;
}

.locked-content {
  background: rgba(47, 79, 47, 0.3);
  padding: 30px;
  border-radius: 15px;
  margin: 20px 0;
  color: #ccc;
  border: 2px solid rgba(85, 85, 85, 0.5);
}

.back-link {
  display: inline-block;
  color: #ffd700;
  text-decoration: none;
  margin-bottom: 20px;
  font-size: 1.1em;
  text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.5);
}

.back-link:hover {
  text-decoration: underline;
  color: #ffed4e;
}

.day-image img {
  max-width: 100%;
  height: auto;
  border-radius: 15px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.4);
  margin: 20px 0;
  border: 3px solid rgba(255, 215, 0, 0.3);
}

.surprise-content img {
  display: block;
  margin: 0 auto;
}

/* Add responsive media queries */
@media screen and (max-width: 768px) {
  body {
    padding: 10px;
  }

  .container {
    max-width: 100%;
    padding: 0 10px;
  }

  h1 {
    font-size: 2em;
    margin-bottom: 15px;
  }

  h2 {
    font-size: 1.3em;
    margin-bottom: 15px;
  }

  .calendar-grid {
    grid-template-columns: repeat(4, 1fr);
    gap: 10px;
    max-width: 320px;
    margin: 20px auto;
  }

  .calendar-day {
    width: 70px;
    height: 70px;
    font-size: 1.3em;
  }

  .important-dates {
    padding: 15px;
    margin: 20px 0;
  }

  .surprise-content {
    padding: 20px;
    margin: 15px 0;
  }

  .locked-content {
    padding: 20px;
    margin: 15px 0;
  }
}

@media screen and (max-width: 400px) {
  h1 {
    font-size: 1.8em;
  }

  h2 {
    font-size: 1.2em;
  }

  .calendar-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 8px;
    max-width: 200px;
    margin: 20px auto;
  }

  .calendar-day {
    width: 60px;
    height: 60px;
    font-size: 1.1em;
  }

  .important-dates {
    padding: 12px;
  }

  .surprise-content {
    padding: 15px;
  }

  .locked-content {
    padding: 15px;
  }
}

@media screen and (min-width: 1200px) {
  .container {
    max-width: 1000px;
  }

  .calendar-grid {
    max-width: 600px;
    gap: 20px;
  }

  .calendar-day {
    width: 90px;
    height: 90px;
    font-size: 1.6em;
  }
}

.spotify-player {
  margin: 20px 0;
  padding: 15px;
  background: rgba(30, 215, 96, 0.1);
  border-radius: 15px;
  border: 2px solid rgba(30, 215, 96, 0.3);
}

.spotify-player iframe {
  max-width: 100%;
  border-radius: 12px;
}

@media screen and (max-width: 480px) {
  .spotify-player {
    padding: 10px;
    margin: 15px 0;
  }

  .spotify-player iframe {
    height: 152px;
  }
}