/* KU Theme Colors */
:root {
    --ku-green: #006664;
    --ku-gold: #B2BB1E;
    --ku-dark-green: #006c67;
    --ku-light-green: #338986;
    --ku-gray: #74787B;
    --ku-light-gray: #f8f9fa;
    --ku-white: #ffffff;
}

/* Global Styles */
body {
    font-family: 'Sarabun', 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    /*background: linear-gradient(135deg, var(--ku-green) 0%, var(--ku-dark-green) 100%);*/
    background: #f8f9fa;
    min-height: 100vh;
}

.ku-navbar {
    background: var(--ku-green) !important;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.ku-navbar .navbar-brand {
    font-weight: 600;
    color: var(--ku-white) !important;
}

.ku-navbar .nav-link {
    color: rgba(255,255,255,0.9) !important;
    font-weight: 500;
}

.ku-navbar .nav-link:hover {
    color: var(--ku-gold) !important;
}

/* Cards */
.ku-card {
    border: none;
    border-radius: 12px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.1);
    background: var(--ku-white);
    margin-bottom: 1.5rem;
}

.ku-card-header {
    background: linear-gradient(135deg, var(--ku-green), var(--ku-light-green));
    color: var(--ku-white);
    border-radius: 12px 12px 0 0 !important;
    border: none;
    padding: 1.25rem;
}

.ku-card-header h4 {
    margin: 0;
    font-weight: 600;
}

.ku-card-body {
    padding: 2rem;
}

/* Buttons */
.btn-ku-primary {
    background: linear-gradient(135deg, var(--ku-green), var(--ku-light-green));
    border: none;
    color: var(--ku-white);
    font-weight: 500;
    padding: 0.75rem 1.5rem;
    border-radius: 8px;
    transition: all 0.3s ease;
}

.btn-ku-primary:hover {
    background: linear-gradient(135deg, var(--ku-dark-green), var(--ku-green));
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(34, 139, 34, 0.3);
    color: var(--ku-white);
}

.btn-ku-outline {
    border: 2px solid var(--ku-green);
    color: var(--ku-green);
    background: transparent;
    font-weight: 500;
    padding: 0.75rem 1.5rem;
    border-radius: 8px;
    transition: all 0.3s ease;
}

.btn-ku-outline:hover {
    background: var(--ku-green);
    color: var(--ku-white);
    transform: translateY(-2px);
}

/* Login Page */
.login-container {
    background: var(--ku-white);
    padding: 3rem;
    border-radius: 16px;
    box-shadow: 0 20px 40px rgba(0,0,0,0.15);
    text-align: center;
    max-width: 450px;
    margin: 2rem auto;
}

.ku-logo {
    width: 120px;
    height: 120px;
    background: linear-gradient(135deg, var(--ku-green), var(--ku-light-green));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 2rem;
    box-shadow: 0 8px 20px rgba(34, 139, 34, 0.3);
}

.ku-logo img {
    width: 80px;
    height: 80px;
    filter: brightness(0) invert(1);
}

.login-title {
    color: var(--ku-green);
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.login-subtitle {
    color: var(--ku-gray);
    margin-bottom: 2.5rem;
    line-height: 1.6;
}

/* Dashboard */
.welcome-card {
    background: linear-gradient(135deg, var(--ku-light-gray), #e9ecef);
    border-left: 5px solid var(--ku-green);
    border-radius: 8px;
    padding: 1.5rem;
    margin-bottom: 2rem;
}

.user-avatar {
    width: 60px;
    height: 60px;
    background: var(--ku-green);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--ku-white);
    font-size: 1.5rem;
    font-weight: 600;
    margin-right: 1rem;
}

/* DataTable Customization */
.dataTables_wrapper .dataTables_length select {
    border: 1px solid var(--ku-green);
    border-radius: 4px;
    padding: 0.375rem;
}

.dataTables_wrapper .dataTables_filter input {
    border: 2px solid var(--ku-green);
    border-radius: 8px;
    padding: 0.5rem 1rem;
    margin-left: 0.5rem;
}

.dataTables_wrapper .dataTables_paginate .paginate_button.current {
    background: var(--ku-green) !important;
    border: 1px solid var(--ku-green) !important;
    color: white !important;
}

.dataTables_wrapper .dataTables_paginate .paginate_button:hover {
    background: var(--ku-light-green) !important;
    border: 1px solid var(--ku-light-green) !important;
    color: white !important;
}

.table-ku {
    background: var(--ku-white);
}

.table-ku thead th {
    background: var(--ku-green);
    color: var(--ku-white);
    border: none;
    font-weight: 600;
    padding: 1rem;
}

.table-ku tbody tr:hover {
    background-color: rgba(34, 139, 34, 0.1);
}

/* Info Cards */
.info-card {
    background: var(--ku-white);
    border-radius: 12px;
    padding: 1.5rem;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
    transition: all 0.3s ease;
    border-left: 4px solid var(--ku-green);
}

.info-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(0,0,0,0.15);
}

.info-card-icon {
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, var(--ku-green), var(--ku-light-green));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--ku-white);
    font-size: 1.25rem;
    margin-bottom: 1rem;
}

.info-card-title {
    color: var(--ku-gray);
    font-size: 0.9rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 0.5rem;
}

.info-card-value {
    color: var(--ku-green);
    font-size: 1.5rem;
    font-weight: 700;
    margin: 0;
}

/* Responsive */
@media (max-width: 768px) {
    .login-container {
        margin: 1rem;
        padding: 2rem;
    }
    
    .ku-logo {
        width: 100px;
        height: 100px;
    }
    
    .login-title {
        font-size: 1.75rem;
    }
    
    .ku-card-body {
        padding: 1rem;
    }
}

/* Loading Animation */
.ku-spinner {
    border: 3px solid rgba(34, 139, 34, 0.3);
    border-top: 3px solid var(--ku-green);
    border-radius: 50%;
    width: 24px;
    height: 24px;
    animation: spin 1s linear infinite;
    display: inline-block;
    margin-left: 0.5rem;
}

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

/* Alerts */
.alert-ku {
    border-left: 4px solid var(--ku-green);
    background: rgba(34, 139, 34, 0.1);
    border-color: var(--ku-green);
    color: var(--ku-dark-green);
}

/* Footer */
.ku-footer {
    background: var(--ku-dark-green);
    color: var(--ku-white);
    padding: 2rem 0;
    margin-top: 3rem;
}

.ku-footer a {
    color: var(--ku-gold);
    text-decoration: none;
}

.ku-footer a:hover {
    color: var(--ku-white);
    text-decoration: underline;
}