body {
  margin: 0;
  font-family: 'Inter', Arial, sans-serif;
  min-height: 100vh;
  background: linear-gradient(120deg, #f7e98c 0%, #7e8be7 100%);
  background-size: 200% 200%;
  animation: gradientMove 8s ease-in-out infinite;
}

@keyframes gradientMove {
  0% {
    background-position: 0% 50%;
  }
  50% {
    background-position: 100% 50%;
  }
  100% {
    background-position: 0% 50%;
  }
}

.aurora-bg {
  position: fixed;
  top: 0; left: 0;
  width: 100vw; height: 100vh;
  z-index: -1;
  pointer-events: none;
}

.aurora {
  position: absolute;
  border-radius: 50%;
  filter: blur(60px);
  opacity: 0.7;
  animation: auroraMove 12s ease-in-out infinite alternate;
}

.aurora.blue {
  background: #4fc3f7;
  width: 60vw; height: 40vw;
  left: 40vw; top: 10vh;
  animation-delay: 0s;
}

.aurora.red {
  background: #ff4e50;
  width: 30vw; height: 20vw;
  left: 70vw; top: 60vh;
  animation-delay: 2s;
}

.aurora.yellow {
  background: #f9d423;
  width: 25vw; height: 15vw;
  left: 10vw; top: 70vh;
  animation-delay: 4s;
}

@keyframes auroraMove {
  0%   { transform: translateY(0) scale(1); }
  50%  { transform: translateY(-40px) scale(1.1); }
  100% { transform: translateY(0) scale(1); }
}

.container {
  max-width: 1100px; /* lebih lebar */
  margin: 0 auto;
  padding: 40px 0;
}

.main-header {
  background: #fffbe6; /* kuning muda */
  border-radius: 20px;
  box-shadow: 0 4px 24px rgba(0,0,0,0.10);
  text-align: center;
  padding: 32px 0 16px 0;
  margin-bottom: 32px;
  width: 100%;
  box-sizing: border-box;
}

.main-header .highlight {
  font-weight: 900;
  font-size: 5rem;
  letter-spacing: 2px;
  background: linear-gradient(90deg, #4fc3f7, #ff4e50, #f9d423);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.subtitle {
  color: #444;
  font-size: 1.1rem;
  margin-top: -20px; /* jarak lebih kecil ke judul */
}

.intro-card, .admin-card {
  background: #fffbe6; /* kuning muda */
  border-radius: 20px;
  box-shadow: 0 4px 24px rgba(0,0,0,0.10);
  padding: 32px;
  margin-bottom: 32px;
  width: 100%;
  box-sizing: border-box;
}

.intro-card h2 {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 10px;
  text-align:center;
  text-transform: uppercase;
  margin-top: 32px; /* tambah jarak ke atas */
  text-align: center; /* jika ingin tetap rata kanan */
}

.intro-card p {
  color: #222;
  font-size: 1.05rem;
  margin-bottom: 24px;
  text-align: center;
}

.button-group {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  justify-content: center; /* agar tombol di tengah */
  margin-bottom: 32px;
}

.btn {
  padding: 14px 36px; /* lebih besar dan proporsional */
  border: none;
  border-radius: 8px;
  font-size: 1.08rem;
  font-weight: 600;
  cursor: pointer;
  color: #fff;
  transition: box-shadow 0.2s;
  box-shadow: 0 2px 8px rgba(0,0,0,0.08);
  min-width: 160px; /* lebar minimal agar seragam */
}

.btn.blue { background: #2563eb; }
.btn.green { background: #22c55e; }
.btn.yellow { background: #facc15; color: #222; }
.btn.dark { background: #222; }
.btn.orange {
  background: #fb8500;
  color: #fff;
}

.admin-card h2 {
  text-align: center;
  font-weight: 900;
  text-transform: uppercase;
}

.admin-list {
  display: flex;
  gap: 32px;
  flex-wrap: wrap;
  justify-content: flex-start;
}

.admin-profile {
  display: flex;
  align-items: center;
  gap: 20px;
  background: linear-gradient(120deg, #fff 60%, #fffbe6 100%);
  border-radius: 16px;
  box-shadow: 0 2px 12px rgba(0,0,0,0.08);
  padding: 24px;
  min-width: 320px;
  flex: 1 1 320px;
  margin-bottom: 0;
}

.admin-photo {
  width: 120px;
  height: 120px;
  background: #444;
  color: #fff;
  border-radius: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  font-weight: 600;
  box-shadow: 0 2px 8px rgba(0,0,0,0.10);
  margin-bottom: 0;
  flex-shrink: 0; /* agar tidak mengecil */
}

.degree {
  color: #888;
  font-size: 0.95rem;
}

.admin-profile p {
  margin: 8px 0 0 0;
  color: #222;
  font-size: 1rem;
}

.login-container {
  background: #fffde7;
  border-radius: 32px;
  box-shadow: 0 8px 32px rgba(0,0,0,0.12);
  max-width: 420px;
  margin: 60px auto;
  padding: 44px 36px 32px 36px;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.login-title {
  text-align: center;
  font-size: 2.2rem;
  font-weight: 900;
  margin-bottom: 32px;
  letter-spacing: 1px;
}

.login-form {
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.login-label {
  font-weight: 700;
  margin-bottom: 8px;
  font-size: 1.08rem;
}

.login-input {
  width: 100%;
  padding: 14px 16px;
  border-radius: 12px;
  border: 1.5px solid #e0e0e0;
  font-size: 1.12rem;
  background: #e3f0ff;
  font-family: inherit;
  margin-bottom: 2px;
  outline: none;
  transition: border 0.2s;
  box-sizing: border-box;
}

.login-input:focus {
  border: 1.5px solid #2563eb;
  background: #f0f8ff;
}

.login-hint {
  font-size: 0.97rem;
  color: #888;
  margin-bottom: 10px;
  margin-top: -6px;
}

.login-btn {
  width: 100%;
  margin-top: 10px;
  margin-bottom: 14px;
  font-size: 1.18rem;
  background: #2563eb;
  color: #fff;
  border: none;
  border-radius: 12px;
  padding: 15px 0;
  font-weight: 700;
  cursor: pointer;
  box-shadow: 0 2px 8px rgba(0,0,0,0.10);
  transition: background 0.2s;
}

.login-btn:hover {
  background: #1746b1;
}

.login-back {
  display: block;
  text-align: center;
  color: #2563eb;
  font-weight: 700;
  font-size: 1.08rem;
  text-decoration: none;
  margin-top: 8px;
  transition: color 0.2s;
}

.login-back:hover {
  color: #1746b1;
  text-decoration: underline;
}

.ebook-title {
  text-align: center;
  font-size: 3rem;
  font-weight: 900;
  color: #222a3a;
  margin-bottom: 8px;
  margin-top: 0;
  text-transform: uppercase;
}

.ebook-subtitle {
  text-align: center;
  font-size: 1.5rem;
  color: #444;
  margin-bottom: 0;
  margin-top: 0;
}

.ebook-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-start;
  height: 100%;
}

.ebook-btn {
  width: 100%;
  margin-top: auto; /* dorong tombol ke bawah card */
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 15px;
}

.ebook-btn.blue {
  background: #2563eb;
  color: #fff;
  padding: 12px 1px;
  border-radius: 8px;
  text-decoration: none;
  font-size: 1.2rem;
  font-weight: 00;
  transition: background 0.2s, transform 0.2s;
}

.ebook-btn.blue:hover {
  background: #1746b1;
  transform: translateY(-2px);
}

.ebook-btn svg {
  stroke: currentColor;
  width: 1.2em;
  height: 1.2em;
  vertical-align: middle;
  margin-right: 8px;
}

.ebook-list {
  display: flex;
  gap: 32px;
  flex-wrap: wrap;
  justify-content: center;
  align-items: stretch; /* pastikan semua card sama tinggi */
}