/* Main Styles for Related Substances Calculation */
body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu, Cantarell, "Open Sans", "Helvetica Neue", sans-serif;
    margin: 0;
    padding: 20px;
    background: linear-gradient(135deg, #E8F8F5 0%, #D5F3EF 50%, #C3EDE8 100%);
    color: #000000;
    font-size: 13px;
    min-height: 100vh;
}

.container {
    max-width: 1400px;
    margin: 20px auto;
    background: rgba(255, 255, 255, 0.95);
    padding: 25px;
    box-shadow: 0 12px 32px rgba(78, 205, 196, 0.15);
    border-radius: 20px;
    backdrop-filter: blur(20px);
    border: 1px solid rgba(78, 205, 196, 0.2);
}

/* Main title styling to match dissolution calculator */
.main-title {
    text-align: center;
    margin: 0 0 30px 0;
    font-size: 2.2rem;
    font-weight: 800;
    color: #000000;
    line-height: 1.3;
    font-family: 'Segoe UI', 'Roboto', 'Helvetica Neue', Arial, sans-serif;
}

/* Remove default h2 styling */
h2 {
    display: none;
}

/* Table Styles */
.main-table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 15px;
    background-color: #fff;
    border: 1px solid #B2DFDB;
    box-shadow: 0 4px 16px rgba(78, 205, 196, 0.1);
    border-radius: 12px;
    overflow: hidden;
}

.main-table td,
.main-table th {
    border: 1px solid #E0F2F1;
    padding: 8px 10px;
    text-align: center;
    vertical-align: middle;
    font-size: 12px;
    color: #000000;
}

.main-table thead td,
.main-table th {
    background: linear-gradient(135deg, #F0F9F7, #E8F8F5);
    font-weight: 600;
    color: #000000;
    border-bottom: 2px solid #B2DFDB;
}

/* Ensure header text spanning columns is centered */
.main-table thead td[colspan] {
    text-align: center;
    background: linear-gradient(135deg, #4ECDC4, #44A08D);
    color: white;
    font-weight: 600;
}

/* Specific cell styling based on image */
.main-table td:first-child {
    background: linear-gradient(135deg, #F0F9F7, #E8F8F5);
    font-weight: 600;
    text-align: left;
    padding-left: 12px;
    color: #000000;
}

/* Override first-child for specific tables/rows where it's not a header */
.main-table#impurityDetailsTable tbody td:first-child,
.main-table.impurity-table tbody td:first-child,
.main-table#sample1Impurities tbody td:first-child,
.main-table#sample2Impurities tbody td:first-child {
    background-color: #fff;
    font-weight: normal;
    text-align: center;
}

/* Standard Prep sub-headers need default background */
.main-table thead tr:nth-child(2) td {
     background: linear-gradient(135deg, #F0F9F7, #E8F8F5);
}

/* Input Styles */
.main-table input[type="text"],
.main-table input[type="number"] {
    width: 95%;
    padding: 6px 8px;
    box-sizing: border-box;
    border: 2px solid #B2DFDB;
    border-radius: 6px;
    font-size: 12px;
    background-color: #fff;
    text-align: right;
    font-family: inherit;
    color: #000000;
}

.main-table input[type="text"] {
     text-align: left;
}

/* Disable transitions on input elements to prevent blur during navigation */
.main-table input[type="text"],
.main-table input[type="number"],
.main-table select {
    transition: none !important;
}

.main-table input:focus {
    border-color: #4ECDC4;
    outline: 0;
    box-shadow: 0 0 0 2px rgba(78, 205, 196, 0.2);
    transition: none !important;
}

.main-table input[readonly] {
    background-color: #F0F9F7;
    border: 2px solid #E0F2F1;
    color: #000000;
    cursor: not-allowed;
}

/* Hide number input spinners (as requested previously) */
.main-table input[type=number]::-webkit-outer-spin-button,
.main-table input[type=number]::-webkit-inner-spin-button {
    -webkit-appearance: none;
    margin: 0;
}

.main-table input[type=number] {
    -moz-appearance: textfield; /* Firefox */
}

/* Samples Container */
.samples-container {
    display: flex;
    justify-content: space-between;
    gap: 25px;
    margin-top: 20px;
}

.sample-instance-container {
    flex: 1;
    background: rgba(255, 255, 255, 0.9);
    padding: 20px;
    border: 2px solid #B2DFDB;
    border-radius: 16px;
    box-shadow: 0 8px 24px rgba(78, 205, 196, 0.1);
    backdrop-filter: blur(10px);
}

.sample-instance-container h3 {
    margin-top: 0;
    margin-bottom: 18px;
    text-align: center;
    font-size: 15px;
    font-weight: 600;
    color: #000000;
    border-bottom: 2px solid #4ECDC4;
    padding-bottom: 10px;
}

.impurity-table td {
    font-size: 11px;
}

/* Highlighted Rows (Keep or adjust as needed) */
.highlighted {
    background-color: #E8F8F5; 
}

/* Button Styles */
.button-container {
    display: flex;
    justify-content: center;
    margin-top: 30px;
    gap: 20px;
    padding: 20px;
    background: rgba(255, 255, 255, 0.8);
    border: 2px solid #B2DFDB;
    border-radius: 16px;
    margin-left: auto;
    margin-right: auto;
    max-width: fit-content;
    backdrop-filter: blur(10px);
}

button {
    padding: 12px 24px;
    background: linear-gradient(135deg, #4ECDC4, #44A08D);
    color: white;
    border: none;
    border-radius: 12px;
    cursor: pointer;
    font-size: 14px;
    font-weight: 600;
    transition: all 0.3s ease;
    box-shadow: 0 4px 16px rgba(78, 205, 196, 0.3);
}

button:hover {
    background: linear-gradient(135deg, #44A08D, #2E8B8B);
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(78, 205, 196, 0.4);
}

button:active {
    background: linear-gradient(135deg, #2E8B8B, #1B6B6B);
    transform: translateY(0);
    box-shadow: 0 4px 16px rgba(78, 205, 196, 0.3);
}

/* Button styles removed - using only export button now */

/* Export Button Styles */
.export-btn {
    background: linear-gradient(135deg, #e74c3c, #c0392b) !important;
    color: white !important;
    border: none !important;
    padding: 12px 24px !important;
    border-radius: 12px !important;
    cursor: pointer !important;
    font-size: 0.85rem !important;
    font-weight: 600 !important;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif !important;
    transition: all 0.3s ease !important;
    box-shadow: 0 4px 16px rgba(231, 76, 60, 0.3) !important;
}

.export-btn:hover {
    background: linear-gradient(135deg, #c0392b, #a93226) !important;
    transform: translateY(-2px) !important;
    box-shadow: 0 8px 24px rgba(231, 76, 60, 0.4) !important;
}


/* Notification Styles */
.notification {
    padding: 15px 20px;
    margin: 25px auto;
    max-width: 800px;
    border-radius: 12px;
    text-align: center;
    display: none;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
    border-left: 5px solid transparent;
    font-size: 14px;
    font-weight: 500;
}

.notification.success {
    background: linear-gradient(135deg, #E8F8F5, #D5F3EF);
    color: #000000;
    border-left-color: #4ECDC4;
}

.notification.error {
    background: linear-gradient(135deg, #FFEBEE, #FFCDD2);
    color: #B71C1C;
    border-left-color: #FF5252;
}

.notification.info {
    background: linear-gradient(135deg, #E3F2FD, #BBDEFB);
    color: #0D47A1;
    border-left-color: #2196F3;
}

/* Responsive Design */
@media (max-width: 768px) {
    body { 
        font-size: 12px; 
        padding: 10px;
    }
    
    .container {
        padding: 20px 15px;
        margin: 10px auto;
        border-radius: 16px;
    }
    
    .main-title {
        font-size: 1.8rem;
        margin-bottom: 20px;
    }
    
    .main-table td, .main-table th { 
        padding: 6px 4px; 
        font-size: 11px; 
    }
    
    .main-table input[type="text"], .main-table input[type="number"] { 
        font-size: 16px; /* Prevents zoom on iOS */
        padding: 6px; 
        width: 90%;
    }
    
    .sample-instance-container h3 { 
        font-size: 1.2rem; 
        margin-bottom: 15px;
    }
    
    .impurity-table td { 
        font-size: 10px; 
    }
    
    /* Make tables scrollable horizontally on mobile */
    .main-table {
        display: block;
        overflow-x: auto;
        white-space: nowrap;
        border-radius: 8px;
    }
    
    .samples-container {
        flex-direction: column;
    }
    
    .sample-instance-container {
        width: 100%;
        box-sizing: border-box;
        margin-bottom: 15px;
        padding: 15px;
        border-radius: 12px;
    }
    
    .button-container {
        flex-wrap: wrap;
        max-width: 100%;
        flex-direction: column;
        gap: 10px;
    }
    
    button {
        margin-bottom: 10px;
        flex-grow: 1;
        padding: 12px 16px;
        font-size: 0.9rem;
    }
}

@media (max-width: 480px) {
    body {
        padding: 5px;
    }
    
    .container {
        padding: 15px 10px;
        margin: 5px auto;
    }
    
    .main-title {
        font-size: 1.5rem;
    }
    
    .main-table td, .main-table th { 
        padding: 4px 2px; 
        font-size: 10px; 
    }
    
    .main-table input[type="text"], .main-table input[type="number"] { 
        font-size: 16px;
        padding: 4px; 
        width: 85%;
    }
    
    .sample-instance-container h3 { 
        font-size: 1.1rem; 
    }
    
    button {
        padding: 10px 12px;
        font-size: 0.85rem;
    }
}





/* Print Styles */
@media print {
    body {
        background-color: white;
        font-size: 10pt;
    }
    .container {
        box-shadow: none;
        padding: 0;
        margin: 0;
        max-width: 100%;
    }
    .main-table {
        box-shadow: none;
        margin-bottom: 8px;
        border: 1px solid #666;
    }
     .main-table td, .main-table th {
        border: 1px solid #666;
        padding: 3px 5px;
        font-size: 9pt;
    }
    .main-table input[type="text"], .main-table input[type="number"] {
        border: none;
        background: none;
        font-size: 9pt;
        width: 100%;
        padding: 1px;
        text-align: inherit;
    }
     .main-table input[readonly] {
         background-color: #eee;
     }
    .button-container, .notification, .sample-instance-container h3 {
        display: none;
    }
     .samples-container {
        display: block; /* Stack samples vertically for print */
    }
    .sample-instance-container {
         border: none;
         box-shadow: none;
         padding: 0;
         margin-bottom: 10px;
         page-break-inside: avoid;
    }
}