/* Base styles */
* {
   margin: 0;
   padding: 0;
   box-sizing: border-box;
   font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
}

/* Header styles */
.header {
   background-color: #003049;
   position: sticky;
   top: 0;
   z-index: 50;
   box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
   width: 100%;
}

.header-container {
   max-width: 1280px;
   margin: 0 auto;
   padding: 0 1.5rem;
}

.header-content {
   height: 4rem;
   display: flex;
   justify-content: space-between;
   align-items: center;
}

.logo-section {
   display: flex;
   align-items: center;
}

.logo-link {
   display: flex;
   align-items: center;
   text-decoration: none;
   color: white;
   gap: 0.25rem;
}

.logo-icon {
   font-size: 2rem;
   color: white;
}

.logo-text {
   font-size: 1.25rem;
   font-weight: bold;
}

.beta-badge {
   background-color: #3b82f6;
   padding: 0.25rem 0.5rem;
   border-radius: 9999px;
   font-size: 0.75rem;
   margin-left: 0.5rem;
}

.main-nav {
   display: flex;
   align-items: center;
}

.nav-link {
   display: flex;
   align-items: center;
   color: white;
   text-decoration: none;
   gap: 0.25rem;
   transition: color 0.2s;
}

.nav-link:hover {
   color: #bfdbfe;
}

/* Body and container */
body {
   background-color: #f5f5f5;
   min-height: 100vh;
   padding-top: 0px;
   margin: 0;
}

.container {
   width: 100%;
   max-width: 600px;
   margin: 0 auto;
   padding: 0 20px;
}

/* Calculator wrapper */
.calculator-wrapper {
   background: white;
   border-radius: 8px;
   box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
   padding: 24px;
   position: relative;
   margin-top: 20px;
}

/* Calculator header */
h1 {
   background-color: #fcbf49;
   margin: -24px -24px 24px -24px;
   padding: 16px;
   border-top-left-radius: 8px;
   border-top-right-radius: 8px;
   color: #333;
   font-size: 24px;
   font-weight: 600;
   text-align: center;
}

/* Form elements */
.input-group {
   margin-bottom: 16px;
}

label {
   display: block;
   font-size: 16px;
   font-weight: 500;
   color: #333;
   margin-bottom: 6px;
}

/* Input and Select */
input[type="number"],
select {
   width: 100%;
   padding: 8px 12px;
   border: 1px solid #ddd;
   border-radius: 4px;
   font-size: 16px;
   background-color: white;
   transition: all 0.2s;
}

input[type="number"]:hover,
select:hover {
   border-color: #003049;
   box-shadow: 0 0 0 3px rgba(0, 48, 73, 0.1);
}

input[type="number"]:focus,
select:focus {
   outline: none;
   border-color: #003049;
   box-shadow: 0 0 0 3px rgba(0, 48, 73, 0.1);
}

/* Radio button */
input[type="radio"] {
   appearance: none;
   -webkit-appearance: none;
   width: 18px;
   height: 18px;
   border: 2px solid #ddd;
   border-radius: 50%;
   margin-right: 8px;
   position: relative;
   top: -1px;
   transition: all 0.2s ease;
}

input[type="radio"]:checked {
   border-color: #003049;
}

input[type="radio"]:checked::after {
   content: '';
   position: absolute;
   top: 50%;
   left: 50%;
   transform: translate(-50%, -50%);
   width: 10px;
   height: 10px;
   background-color: #003049;
   border-radius: 50%;
}

input[type="radio"]:hover {
   border-color: #003049;
   box-shadow: 0 0 0 3px rgba(0, 48, 73, 0.1);
}

/* Checkbox */
input[type="checkbox"] {
   appearance: none;
   -webkit-appearance: none;
   width: 18px;
   height: 18px;
   border: 2px solid #ddd;
   border-radius: 4px;
   margin-right: 8px;
   position: relative;
   top: -1px;
   transition: all 0.2s ease;
   cursor: pointer;
}

input[type="checkbox"]:checked {
   border-color: #003049;
   background-color: #003049;
}

input[type="checkbox"]:checked::after {
   content: '';
   position: absolute;
   top: 2px;
   left: 6px;
   width: 4px;
   height: 8px;
   border: solid white;
   border-width: 0 2px 2px 0;
   transform: rotate(45deg);
}

input[type="checkbox"]:hover {
   border-color: #003049;
   box-shadow: 0 0 0 3px rgba(0, 48, 73, 0.1);
}

/* Select dropdown */
select {
   appearance: none;
   -webkit-appearance: none;
   background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12' fill='none'%3E%3Cpath d='M2.5 4.5L6 8L9.5 4.5' stroke='%23003049' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
   background-repeat: no-repeat;
   background-position: right 12px center;
   padding-right: 36px;
   cursor: pointer;
}

/* Radio and Checkbox groups */
.radio-group {
   display: flex;
   gap: 16px;
}

.radio-label,
.checkbox-label {
   display: flex;
   align-items: center;
   gap: 4px;
   cursor: pointer;
   color: #333;
   padding: 8px 12px;
   border-radius: 4px;
   transition: background-color 0.2s ease;
}

.radio-label:hover,
.checkbox-label:hover {
   background-color: rgba(0, 48, 73, 0.05);
}

.checkbox-group {
   margin-top: 16px;
}

/* Header with checkbox */
.header-with-checkbox {
   display: flex;
   justify-content: space-between;
   align-items: center;
   margin-bottom: 8px;
}

/* Grid layouts */
.dimensions-grid,
.calculator-grid {
   display: grid;
   grid-template-columns: 1fr 1fr;
   gap: 16px;
}

/* Results section */
.results {
   background: linear-gradient(to bottom right, #f0f9ff, #e0f2fe);
   border: 1px solid #bae6fd;
   border-radius: 4px;
   padding: 16px;
   margin-top: 24px;
}

.results h3 {
   color: #003049;
   font-size: 18px;
   margin-bottom: 16px;
   padding-bottom: 8px;
   font-weight: 600;
   border-bottom: 2px solid #bae6fd;
}

.results-section {
   margin-bottom: 12px;
}

.results-section:last-child {
   margin-bottom: 0;
}

.flex-between {
   display: flex;
   justify-content: space-between;
   align-items: center;
   gap: 12px;
   padding: 4px 0;
}

.flex-between span:first-child {
   color: #003049;
   font-size: 16px;
}

.font-medium {
   font-weight: 600;
   color: #003049;
   font-size: 16px;
}

.border-top {
   border-top: 1px solid #bae6fd;
   padding-top: 12px;
   margin-top: 12px;
}

/* Reset Button */
.reset-button {
   width: 100%;
   padding: 8px 16px;
   background: #fff;
   border: 1px solid #ddd;
   border-radius: 4px;
   color: #333;
   font-size: 16px;
   cursor: pointer;
   display: flex;
   align-items: center;
   justify-content: center;
   margin-top: 16px;
   transition: all 0.2s;
}

.reset-button:hover {
   background: #f5f5f5;
   border-color: #003049;
}

/* Hide number input spinners */
input::-webkit-outer-spin-button,
input::-webkit-inner-spin-button {
   -webkit-appearance: none;
   margin: 0;
}

input[type=number] {
   -moz-appearance: textfield;
}

/* Hide elements */
.hidden {
   display: none;
}

/* FAQ Section */
.faq-section {
   margin-top: 32px;
   padding: 24px;
   background: white;
   border-radius: 8px;
   box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.faq-section h2 {
   color: #003049;
   font-size: 24px;
   font-weight: 600;
   margin-bottom: 24px;
   text-align: center;
}

.faq-grid {
   display: flex;
   flex-direction: column;
   gap: 24px;
}

.faq-item {
   background: linear-gradient(to bottom right, #f0f9ff, #e0f2fe);
   border: 1px solid #bae6fd;
   border-radius: 4px;
   padding: 16px;
}

.faq-item h3 {
   color: #003049;
   font-size: 18px;
   font-weight: 600;
   margin-bottom: 12px;
}

.faq-content p {
   color: #333;
   font-size: 15px;
   line-height: 1.5;
   margin-bottom: 12px;
}

.faq-content ul {
   list-style-type: none;
   padding-left: 0;
   margin-bottom: 12px;
}

.faq-content li {
   color: #444;
   font-size: 15px;
   line-height: 1.5;
   padding: 4px 0 4px 20px;
   position: relative;
}

.faq-content li::before {
   content: "•";
   color: #003049;
   position: absolute;
   left: 0;
   font-weight: bold;
}

/* Responsive styles */
@media (max-width: 640px) {
   .header-container {
       padding: 0 1rem;
   }
   
   .logo-text {
       font-size: 1rem;
   }
   
   .beta-badge {
       font-size: 0.625rem;
       padding: 0.125rem 0.375rem;
   }
   
   .header-content {
       height: 3.5rem;
   }
   
   .calculator-wrapper {
       padding: 16px;
   }
   
   h1 {
       margin: -16px -16px 16px -16px;
       font-size: 20px;
   }
   
   .calculator-grid,
   .dimensions-grid {
       gap: 12px;
   }
   
   .results {
       padding: 12px;
   }
   
   .flex-between {
       padding: 8px 0;
       gap: 8px;
   }
   
   .results-section {
       margin-bottom: 16px;
   }
   
   .border-top {
       padding-top: 16px;
       margin-top: 16px;
   }
   
   .font-medium {
       text-align: right;
       min-width: 120px;
   }
   
   .faq-section {
       padding: 16px;
       margin-top: 24px;
   }
   
   .faq-section h2 {
       font-size: 20px;
       margin-bottom: 16px;
   }
   
   .faq-grid {
       gap: 16px;
   }
   
   .faq-item {
       padding: 12px;
   }
   
   .faq-item h3 {
       font-size: 16px;
       margin-bottom: 8px;
   }
   
   .faq-content p,
   .faq-content li {
       font-size: 14px;
   }
}

@media (max-width: 480px) {
   .header {
       position: fixed;
   }
   
   body {
       padding-top: 3.5rem;
   }
   
   .logo-icon {
       font-size: 1.5rem;
   }
}