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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    padding: 20px;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
}

header {
    text-align: center;
    color: white;
    margin-bottom: 40px;
    animation: slideDown 0.5s ease-out;
}

/*header h1 {
    font-size: 2.5em;
    margin-bottom: 10px;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
}

header p {
    font-size: 1.1em;
    opacity: 0.9;
}*/

.main-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 30px;
    margin-bottom: 30px;
}

.card {
    background: white;
    border-radius: 15px;
    padding: 30px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.2);
    animation: fadeIn 0.5s ease-out;
}

.card h2 {
    color: #667eea;
    margin-bottom: 20px;
    font-size: 1.5em;
    border-bottom: 3px solid #667eea;
    padding-bottom: 10px;
}

.form-group {
    margin-bottom: 20px;
}

label {
    display: block;
    margin-bottom: 8px;
    color: #333;
    font-weight: 500;
}

input[type="text"],
input[type="number"],
input[type="file"],
select,
textarea {
    width: 100%;
    padding: 12px;
    border: 2px solid #e0e0e0;
    border-radius: 8px;
    font-size: 1em;
    transition: border-color 0.3s;
}

input[type="text"]:focus,
input[type="number"]:focus,
input[type="file"]:focus,
select:focus,
textarea:focus {
    outline: none;
    border-color: #667eea;
    box-shadow: 0 0 5px rgba(102, 126, 234, 0.3);
}

button {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 12px 30px;
    border: none;
    border-radius: 8px;
    font-size: 1em;
    font-weight: 600;
    cursor: pointer;
    transition: transform 0.2s, box-shadow 0.2s;
    width: 100%;
}

button:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(102, 126, 234, 0.4);
}

button:active {
    transform: translateY(0);
}

.file-input-wrapper {
    position: relative;
    overflow: hidden;
}

.file-input-label {
    display: flex;
    align-items: center;
    justify-content: center;
    background: #f5f5f5;
    border: 2px dashed #667eea;
    border-radius: 8px;
    padding: 30px;
    cursor: pointer;
    transition: background 0.3s;
}

.file-input-label:hover {
    background: #efefef;
}

.file-input-wrapper input[type="file"] {
    display: none;
}

.alert {
    padding: 15px;
    margin-bottom: 20px;
    border-radius: 8px;
    display: none;
}

.alert.success {
    background: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
    display: block;
}

.alert.error {
    background: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
    display: block;
}
.alert.danger {
    background: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
}

.alert.info {
    background: #d1ecf1;
    color: #0c5460;
    border: 1px solid #bee5eb;
    display: block;
}

.result-display {
    background: #f9f9f9;
    padding: 20px;
    border-radius: 8px;
    margin-top: 20px;
}

.result-row {
    display: flex;
    justify-content: space-between;
    padding: 10px 0;
    border-bottom: 1px solid #e0e0e0;
    font-size: 1.1em;
}

.result-row:last-child {
    border-bottom: none;
}

.result-row strong {
    color: #667eea;
}

.score-box {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 20px;
    border-radius: 8px;
    text-align: center;
    margin: 20px 0;
}

.score-box .score-value {
    font-size: 3em;
    font-weight: bold;
}

.score-box .score-label {
    font-size: 0.9em;
    opacity: 0.9;
}

.chart-container {
    margin-top: 20px;
}

.chart-container img {
    width: 100%;
    height: auto;
}

.table-container {
    overflow-x: auto;
    margin-top: 20px;
}

table {
    width: 100%;
    border-collapse: collapse;
    background: white;
}

th {
    background: #667eea;
    color: white;
    padding: 12px;
    text-align: left;
    font-weight: 600;
}

td {
    padding: 12px;
    border-bottom: 1px solid #e0e0e0;
}

tr:hover {
    background: #f5f5f5;
}

.spinner {
    display: none;
    border: 4px solid #f3f3f3;
    border-top: 4px solid #667eea;
    border-radius: 50%;
    width: 40px;
    height: 40px;
    animation: spin 1s linear infinite;
    margin: 20px auto;
}

/* Dashboard Header Styling */
.dashboard-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: linear-gradient(90deg, #2575fc, #6a11cb);
    color: white;
    padding: 15px 30px;
    border-radius: 10px;
    box-shadow: 0 4px 10px rgba(0,0,0,0.15);
}

.dashboard-header h1 {
    margin: 0;
    font-size: 1.5rem;
}

.dashboard-header p {
    margin: 3px 0 0;
    font-size: 0.9rem;
    opacity: 0.9;
}

/* Logout Button */
.logout-btn {
    background: white;
    color: #2575fc;
    font-weight: 600;
    border: none;
    border-radius: 8px;
    padding: 8px 16px;
    cursor: pointer;
    transition: all 0.2s ease-in-out;
    font-size: 0.95rem;
}

.logout-btn:hover {
    background: #2575fc;
    color: white;
    box-shadow: 0 4px 12px rgba(0,0,0,0.2);
    transform: translateY(-1px);
}

.header-right form {
    margin: 0;
}
/* Navbar Styling */
.navbar {
    background: linear-gradient(90deg, #2575fc, #6a11cb);
    padding: 10px 25px;
    box-shadow: 0 4px 10px rgba(0,0,0,0.2);
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

/* Logo section */
.nav-logo {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
    color: white;
}

.nav-logo-img {
    width: 48px;
    height: auto;
    border-radius: 6px;
    object-fit: contain;
}
.nav-title {
    display: flex;
    flex-direction: column;
    line-height: 1.2;
}

.nav-title h1 {
    font-size: 1.3rem;
    font-weight: 600;
    margin: 0;
    color: white;
}

.nav-title p {
    font-size: 0.9rem;
    color: #e0e0e0;
    margin: 2px 0 0;
}


/* Navbar links */
.nav-menu {
    list-style: none;
    display: flex;
    gap: 20px;
    margin: 0;
    padding: 0;
}

.nav-link {
    color: white;
    text-decoration: none;
    font-weight: 500;
    transition: color 0.2s ease;
}

.nav-link:hover {
    color: #ffeb3b;
}



@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@media (max-width: 768px) {
    .main-grid {
        grid-template-columns: 1fr;
    }

    header h1 {
        font-size: 1.8em;
    }
}

.badge {
    display: inline-block;
    padding: 5px 12px;
    border-radius: 20px;
    font-size: 0.85em;
    font-weight: 600;
}

.badge.success {
    background: #d4edda;
    color: #155724;
}

.badge.warning {
    background: #fff3cd;
    color: #856404;
}

.badge.error {
    background: #f8d7da;
    color: #721c24;
}

footer {
    text-align: center;
    color: white;
    margin-top: 40px;
    padding: 20px;
    opacity: 0.8;
}