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

body {
  background: #F2F5F9;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
  color: #1A2C3E;
}

header {
  background: #0B1C2C;
  padding: 16px 32px;
  border-bottom: 1px solid #1F3A4B;
}
header nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: 1200px;
  margin: 0 auto;
  flex-wrap: wrap;
  gap: 20px;
}
header nav h2 {
  color: white;
  font-size: 1.8rem;
  letter-spacing: -0.5px;
}
header nav ul {
  display: flex;
  list-style: none;
  gap: 28px;
}
header nav ul li a {
  color: #E0E9F0;
  text-decoration: none;
  font-weight: 500;
  transition: color 0.2s;
}
header nav ul li a:hover {
  color: #5DB0D6;
}

footer {
  background: #0B1C2C;
  padding: 32px 32px 24px;
  margin-top: 48px;
}
footer nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: 1200px;
  margin: 0 auto;
  flex-wrap: wrap;
  gap: 20px;
}
footer nav h2 {
  color: white;
  font-size: 1.5rem;
}
footer nav ul {
  display: flex;
  list-style: none;
  gap: 28px;
}
footer nav ul li a {
  color: #C0CFDE;
  text-decoration: none;
  font-size: 0.9rem;
  transition: color 0.2s;
}
footer nav ul li a:hover {
  color: #5DB0D6;
}

.app-container {
  max-width: 1000px;
  margin: 2rem auto;
  padding: 0 20px;
}

.card {
  background: #FFFFFF;
  border-radius: 28px;
  padding: 28px 32px;
  margin-bottom: 24px;
  border: 1px solid #EDF2F8;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.03), 0 1px 2px rgba(0, 0, 0, 0.02);
}
.section-title {
  font-size: 20px;
  font-weight: 700;
  color: #1A2C3E;
  margin-bottom: 20px;
  letter-spacing: -0.2px;
}
.sub-card {
  background: #F8FAFE;
  border-radius: 20px;
  padding: 18px 22px;
  margin-bottom: 20px;
  border: 1px solid #EFF3FA;
}
.premium-name {
  font-weight: 800;
  font-size: 18px;
  color: #1E4A76;
}
.premium-desc {
  color: #2C3F55;
  margin: 8px 0 10px;
  font-size: 0.9rem;
}

.billing-row {
  display: flex;
  flex-direction: row;
  flex-wrap: nowrap;
  align-items: center;
  justify-content: flex-start; 
  gap: 15px;                     
  width: 100%;
  font-size: 0.85rem;
  color: #4A627A;
}
.manage-link {
  color: #2C7DA0;
  font-weight: 600;
  text-decoration: none;
  font-size: 0.85rem;
  white-space: nowrap;
  flex-shrink: 0;
}

hr {
  margin: 20px 0;
  border: none;
  border-top: 1px solid #EEF2F8;
}

.premium-highlight {
  background: transparent !important;
  border-left: none !important;
  padding: 0 0 8px 0 !important;
}
.premium-highlight h4 {
  color: #1E4A76;
  font-weight: 600;
  margin: 0;
  font-size: 1rem;
}

.saved-list {
  width: fit-content;
  list-style-type: disc;
  list-style-position: inside;
  padding-left: 20px;
}
.saved-list li {
  width: 100%;
  padding: 8px 0;
  border-bottom: 1px solid #F0F3F8;
  font-weight: 500;
  font-size: 0.95rem;
  color: #1A2C3E;
}
.saved-list li:last-child {
  border-bottom: none;
}

.settings-form .field {
  margin-bottom: 1.2rem;
  display: block;
  width: 100%;
}
.settings-form label {
  display: block;
  font-weight: 600;
  font-size: 0.85rem;
  margin-bottom: 6px;
  color: #2C3F55;
}
.settings-form input[type="text"],
.settings-form input[type="email"] {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid #DCE5EF;
  border-radius: 18px;
  font-size: 0.9rem;
  background: #FFFFFF;
  box-sizing: border-box;
}
.checkbox-row {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: 6px;
}
.checkbox-row input {
  width: 18px;
  height: 18px;
  accent-color: #1E4A76;
}
.checkbox-row label {
  font-weight: normal;
}

.button-wrapper {
  text-align: center; 
}
.btn-primary {
  background: #1E4A76;
  color: white;
  border: none;
  width: auto;
  padding: 8px 24px;
  border-radius: 40px;
  font-weight: 600;
  cursor: pointer;
  transition: 0.2s;
  font-size: 0.85rem;
}
.btn-primary:hover {
  background: #0F3B5E;
}

@media (max-width: 720px) {
  body {
    padding: 0;
  }
  
  .app-container {
    padding: 0 16px;
    margin: 1rem auto;
  }
  
  .card {
    padding: 20px;
    border-radius: 20px;
  }
  
  .section-title {
    font-size: 18px;
    margin-bottom: 16px;
  }
  
  .sub-card {
    padding: 14px 16px;
  }
  
  .premium-name {
    font-size: 16px;
  }
  
  .premium-desc {
    font-size: 0.85rem;
  }
  
  .billing-row {
    flex-wrap: wrap;
    justify-content: flex-start;
    gap: 8px;
  }
  
  .manage-link {
    white-space: normal;
  }
  
  .saved-list {
    width: 100%;
    padding-left: 20px;
  }
  
  .saved-list li {
    font-size: 0.9rem;
    word-break: break-word;
  }
  
  .settings-form input[type="text"],
  .settings-form input[type="email"] {
    padding: 10px 12px;
    font-size: 0.85rem;
  }
  
  .btn-primary {
    width: 100%;
    padding: 10px 24px;
    font-size: 0.9rem;
  }
}

@media (max-width: 480px) {
  header {
    padding: 12px 20px;
  }
  
  header nav h2 {
    font-size: 1.4rem;
  }
  
  header nav ul {
    gap: 20px;
  }
  
  header nav ul li a {
    font-size: 0.85rem;
  }
  
  footer {
    padding: 24px 20px 20px;
    margin-top: 32px;
  }
  
  footer nav h2 {
    font-size: 1.2rem;
  }
  
  footer nav ul {
    gap: 20px;
  }
  
  footer nav ul li a {
    font-size: 0.8rem;
  }
  
  .app-container {
    padding: 0 12px;
  }
  
  .card {
    padding: 16px;
    border-radius: 16px;
  }
  
  .section-title {
    font-size: 16px;
  }
  
  .sub-card {
    padding: 12px;
    border-radius: 14px;
  }
  
  .billing-row {
    flex-direction: column;
    align-items: flex-start;
    gap: 6px;
  }
  
  .premium-name {
    font-size: 15px;
  }
  
  .saved-list li {
    font-size: 0.85rem;
    padding: 6px 0;
  }
  
  .checkbox-row {
    gap: 8px;
  }
  
  .checkbox-row input {
    width: 16px;
    height: 16px;
  }
  
  .checkbox-row label {
    font-size: 0.85rem;
  }
  
  .btn-primary {
    padding: 8px 20px;
    font-size: 0.85rem;
  }
}

@media (min-width: 721px) and (max-width: 1024px) {
  .app-container {
    max-width: 90%;
    padding: 0 24px;
  }
  
  .card {
    padding: 24px 28px;
  }
  
  .billing-row {
    flex-wrap: wrap;
    gap: 12px;
  }
}

@media (min-width: 1025px) and (max-width: 1400px) {
  .app-container {
    max-width: 900px;
  }
}

@media (min-width: 1401px) {
  .app-container {
    max-width: 1100px;
  }
  
  .card {
    padding: 32px 40px;
  }
  
  .section-title {
    font-size: 22px;
  }
  
  .premium-name {
    font-size: 20px;
  }
  
  .premium-desc {
    font-size: 1rem;
  }
}

@media (max-width: 720px) and (orientation: landscape) {
  .app-container {
    margin: 0.5rem auto;
  }
  
  .card {
    padding: 16px;
  }
  
  .sub-card {
    margin-bottom: 12px;
  }
  
  header nav ul {
    gap: 16px;
  }
}