/* Reset CSS */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  /* Font Manrope (mirip GT Walsheim) */
  font-family: 'Manrope', sans-serif;
}

body {
  background: linear-gradient(135deg, #1a2a6c, #b21f1f, #fdbb2d);
  min-height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 15px;
  color: white;
  line-height: 1.4;
}

.container {
  max-width: 600px;
  width: 100%;
  background: rgba(0, 0, 0, 0.75);
  border-radius: 16px;
  padding: 25px;
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.3);
  text-align: center;
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.logo {
  width: 90px;
  height: 90px;
  margin: 0 auto 15px;
  display: block;
  border-radius: 50%;
  border: 2px solid rgba(255, 255, 255, 0.8);
  padding: 4px;
  background: white;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
}

.header {
  margin-bottom: 20px;
}

h1 {
  font-size: 2.4rem;
  font-weight: 700;
  margin-bottom: 8px;
  text-shadow: 1px 1px 3px rgba(0, 0, 0, 0.3);
  letter-spacing: -0.5px;
  line-height: 1.1;
}

.subtitle-container {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.subtitle-light {
  font-weight: 300;
  font-size: 1.2rem;
  opacity: 0.9;
  letter-spacing: 1px;
  text-transform: uppercase;
}

.subtitle-year {
  font-weight: 500;
  font-size: 1.4rem;
  margin-top: 2px;
  letter-spacing: 1px;
  text-transform: uppercase;
}

.instruction {
  margin: 20px 0 25px;
  font-size: 1.2rem;
  font-weight: 500;
  background: rgba(255, 255, 255, 0.1);
  padding: 12px 20px;
  border-radius: 10px;
  display: inline-block;
  letter-spacing: 0.5px;
}

.section-title {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  margin: 30px 0 20px;
  font-size: 1.4rem;
  font-weight: 600;
  letter-spacing: 0.5px;
  text-transform: uppercase;
}

.icon-grid {
  display: flex;
  justify-content: center;
  gap: 50px;
  margin: 20px 0 25px;
}

.icon-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 15px;
}

.icon-btn {
  position: relative;
  width: 90px;
  height: 90px;
  border: none;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.12);
  color: white;
  cursor: pointer;
  transition: all 0.3s ease;
  overflow: hidden;
  display: flex;
  justify-content: center;
  align-items: center;
  text-decoration: none;
}

.icon-btn:hover {
  transform: translateY(-5px);
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.3);
}

.icon-btn.unit1:hover {
  background: linear-gradient(135deg, #4e54c8, #8a2387);
}

.icon-btn.unit2:hover {
  background: linear-gradient(135deg, #f46b45, #eea849);
}

.icon-btn.proctor1:hover {
  background: linear-gradient(135deg, #11998e, #38ef7d);
}

.icon-btn.proctor2:hover {
  background: linear-gradient(135deg, #56ccf2, #2f80ed);
}

.icon-inner {
  font-size: 2.4rem;
  transition: all 0.3s ease;
}

.icon-btn:hover .icon-inner {
  transform: scale(1.1);
}

.tooltip {
  position: absolute;
  bottom: -35px;
  left: 50%;
  transform: translateX(-50%) translateY(10px);
  background: rgba(0, 0, 0, 0.85);
  color: white;
  padding: 6px 12px;
  border-radius: 6px;
  font-size: 0.85rem;
  white-space: nowrap;
  opacity: 0;
  transition: all 0.3s ease;
  pointer-events: none;
  font-weight: 500;
  letter-spacing: 0.3px;
}

.icon-label {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 5px;
}

.label-title {
  font-weight: 700;
  font-size: 1.1rem;
  letter-spacing: 0.5px;
}

.label-desc {
  font-size: 0.9rem;
  opacity: 0.9;
  font-weight: 400;
  letter-spacing: 0.3px;
}

.note {
  margin: 30px 0 20px;
  padding: 15px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 10px;
  font-size: 1rem;
  font-weight: 400;
  backdrop-filter: blur(5px);
  border: 1px solid rgba(255, 255, 255, 0.1);
  letter-spacing: 0.3px;
}

footer {
  margin-top: 25px;
  font-size: 0.85rem;
  opacity: 0.7;
  font-weight: 300;
  letter-spacing: 0.5px;
}

/* Animasi */
@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(15px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.container {
  animation: fadeIn 0.6s ease-out;
}

/* ==================== */
/* RESPONSIVITAS MOBILE */
/* ==================== */

@media (max-width: 768px) {
  .container {
    padding: 20px 15px;
    max-width: 95%;
    margin: 10px;
  }
  
  h1 {
    font-size: 2rem;
    letter-spacing: -0.3px;
  }
  
  .subtitle-light {
    font-size: 1.1rem;
  }
  
  .subtitle-year {
    font-size: 1.2rem;
  }
  
  .instruction {
    font-size: 1.1rem;
    padding: 10px 15px;
    margin: 15px 0 20px;
  }
  
  /* Layout vertikal untuk grid icon */
  .icon-grid {
    flex-direction: column;
    align-items: center;
    gap: 35px;
    margin: 25px 0;
  }
  
  /* Lebar penuh untuk item icon di mobile */
  .icon-item {
    width: 100%;
    max-width: 280px;
  }
  
  /* Icon button lebih besar di mobile */
  .icon-btn {
    width: 100px;
    height: 100px;
  }
  
  .icon-inner {
    font-size: 2.6rem;
  }
  
  .section-title {
    font-size: 1.3rem;
    margin: 35px 0 25px;
  }
  
  .label-title {
    font-size: 1.15rem;
  }
  
  .label-desc {
    font-size: 0.95rem;
  }
}

@media (max-width: 480px) {
  body {
    padding: 10px;
  }
  
  .container {
    padding: 20px 15px;
    border-radius: 12px;
  }
  
  .logo {
    width: 80px;
    height: 80px;
  }
  
  h1 {
    font-size: 1.8rem;
  }
  
  .subtitle-light {
    font-size: 1rem;
  }
  
  .subtitle-year {
    font-size: 1.1rem;
  }
  
  /* Layout vertikal dengan spacing yang baik */
  .icon-grid {
    gap: 30px;
  }
  
  .icon-item {
    max-width: 100%;
  }
  
  /* Icon button proporsional dengan lebar HP */
  .icon-btn {
    width: 95px;
    height: 95px;
  }
  
  .icon-inner {
    font-size: 2.4rem;
  }
  
  .section-title {
    font-size: 1.2rem;
    margin: 30px 0 20px;
  }
  
  .label-title {
    font-size: 1.05rem;
  }
  
  .label-desc {
    font-size: 0.9rem;
  }
  
  .note {
    font-size: 0.9rem;
    padding: 12px;
    margin: 25px 0 20px;
  }
  
  footer {
    font-size: 0.8rem;
    margin-top: 20px;
  }
}

/* Untuk layar sangat kecil (iPhone SE dll) */
@media (max-width: 320px) {
  .icon-btn {
    width: 85px;
    height: 85px;
  }
  
  .icon-inner {
    font-size: 2.2rem;
  }
  
  h1 {
    font-size: 1.7rem;
  }
  
  .instruction {
    font-size: 1rem;
  }
  
  .section-title {
    font-size: 1.1rem;
  }
}