/* Modern Reset & Body Styling */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

:root {
    --primary-color: #3498db;
    --primary-dark: #2980b9;
    --accent-color: #e74c3c;
    --text-color: #2c3e50;
    --light-gray: #f4f7f6;
    --border-radius: 8px;
    --box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
}

body {
    font-family: 'Segoe UI', Roboto, -apple-system, BlinkMacSystemFont, Helvetica, Arial, sans-serif;
    line-height: 1.7;
    color: var(--text-color);
    min-height: 100vh;
}

/* Container */
.container {
    max-width: 650px;
    margin: 40px auto;
    padding: 40px;
    background-color: #fff;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    position: relative;
    overflow: hidden;
}

.container::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 5px;
}

/* Headings */
h1, h2, h3 {
    color: var(--text-color);
    margin-bottom: 1.2em;
    text-align: center;
    font-weight: 600;
}

.navbar-nav .nav-link {
    color: #041c4c;
}

h1 {
    margin-bottom: 1.8em;
    font-size: 2.2rem;
    position: relative;
    padding-bottom: 0.5em;
}

h1::after {
    content: "";
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background: linear-gradient(to right, var(--primary-color), var(--primary-dark));
    border-radius: 2px;
}

h2 {
    font-size: 1.6rem;
    color: var(--primary-dark);
    border-bottom: none;
    margin-top: 1.5em;
}

h3 {
    font-size: 1.3rem;
    margin-top: 1.5em;
    margin-bottom: 1em;
    color: var(--text-color);
}

/* Form Styling */
#resultForm {
    display: flex;
    flex-direction: column;
    gap: 20px;
    margin-bottom: 30px;
}

.form-group {
    display: flex;
    flex-direction: column;
}

.form-group label {
    margin-bottom: 8px;
    font-weight: 600;
    color: #456;
    font-size: 1.05rem;
}

.form-group input[type="text"] {
    padding: 14px 16px;
    border: 2px solid #ddd;
    border-radius: var(--border-radius);
    font-size: 1rem;
    transition: all 0.3s ease;
    background-color: #f9fafc;
}

.form-group input[type="text"]:focus {
    border-color: var(--primary-color);
    outline: none;
    box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.2);
    background-color: #fff;
}

.form-group input[type="password"] {
    padding: 14px 16px;
    border: 2px solid #ddd;
    border-radius: var(--border-radius);
    font-size: 1rem;
    transition: all 0.3s ease;
    background-color: #f9fafc;
}

.form-group input[type="password"]:focus {
    border-color: var(--primary-color);
    outline: none;
    box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.2);
    background-color: #fff;
}


.form-group small {
    font-size: 0.85em;
    color: #777;
    margin-top: 6px;
}

/* Button Styling */
button[type="submit"] {
    padding: 14px 24px;
    background: linear-gradient(to right, var(--primary-color), var(--primary-dark));
    color: white;
    border: none;
    border-radius: var(--border-radius);
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    margin-top: 15px;
    box-shadow: 0 4px 10px rgba(41, 128, 185, 0.3);
    letter-spacing: 0.5px;
}

button[type="submit"]:hover {
    box-shadow: 0 6px 15px rgba(41, 128, 185, 0.4);
    transform: translateY(-2px);
}

button[type="submit"]:active {
    transform: translateY(0);
    box-shadow: 0 2px 5px rgba(41, 128, 185, 0.4);
}

/* Result Area */
.result-area {
    margin-top: 35px;
    padding: 25px;
    border: none;
    border-radius: var(--border-radius);
    background-color: #f8fafc;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.05);
}

.result-area p {
    margin-bottom: 1em;
    font-size: 1.05rem;
    line-height: 1.6;
}

.result-area p strong {
    color: #345;
    min-width: 130px;
    display: inline-block;
    font-weight: 600;
}

/* Score Table */
.scoresTable {
    width: 100%;
    margin-top: 1.5em;
    border-collapse: separate;
    border-spacing: 0;
    font-size: 1rem;
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
}

.scoresTable th,
.scoresTable td {
    border: none;
    border-bottom: 1px solid #eee;
    padding: 14px 16px;
    text-align: left;
}

.scoresTable thead th {
    background: linear-gradient(to right, #34495e, #2c3e50);
    color: white;
    font-weight: 600;
    font-size: 0.95rem;
    letter-spacing: 0.5px;
    text-transform: uppercase;
}

.scoresTable tbody tr {
    transition: background-color 0.2s ease;
}

.scoresTable tbody tr:hover {
    background-color: #f0f4f8;
}

.scoresTable tbody tr:nth-child(even) {
    background-color: #f8fafc;
}

.scoresTable .total-row {
    font-weight: bold;
    background-color: #e1f0fa !important;
}

.scoresTable .total-row td {
    color: var(--primary-dark);
    border-bottom: none;
    font-size: 1.1rem;
}

.result-note.qualified {
    color: #27ae60;
    font-weight: 600;
    background-color: #f0fff4;
    padding: 15px;
    border-radius: var(--border-radius);
    border: 1px solid #b7f0d3;
}

.result-note.not-qualified {
    color: #7b7b7b;
    font-weight: 600;
    background-color: #f7f7f7;
    padding: 15px;
    border-radius: var(--border-radius);
    border: 1px solid #e0e0e0;
}

.result-note {
    margin-top: 25px;
    text-align: center;
    font-size: 1.2rem;
    padding: 10px;
    border-top: 1px dashed #ddd;
}

/* Error Message */
.error-message {
    margin-top: 25px;
    padding: 16px;
    background-color: #fef2f2;
    color: #b91c1c;
    border-left: 4px solid #ef4444;
    border-radius: 4px;
    text-align: center;
    font-weight: 500;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
}

/* Input Validation Visual Feedback */
input:invalid {
  border-color: var(--accent-color);
  background-color: #fff5f5;
}

input:required:valid {
   border-color: #2ecc71;
   background-color: #f2fcf6;
}

#loadingMessage {
    font-style: italic;
    padding: 20px;
    background-color: #eef8ff;
    border-radius: var(--border-radius);
    text-align: center;
    position: relative;
    margin-bottom: 30px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
}

/* Responsive adjustments */
@media (max-width: 600px) {
    .container {
        padding: 25px;
        margin: 20px auto;
    }
    
    h1 {
        font-size: 1.8rem;
    }
    
    .form-group label, .result-area p strong {
        min-width: 100px;
    }
    
    #scoresTable th, #scoresTable td {
        padding: 10px 12px;
    }
}

.loading-spinner {
    width: 30px;
    height: 30px;
    border: 3px solid rgba(52, 152, 219, 0.3);
    border-radius: 50%;
    border-top-color: var(--primary-color);
    animation: spin 1s ease-in-out infinite;
    margin: 0 auto 15px auto;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}