/* Global Variables & Base Styles */
:root {
    --font-family-base: "Noto Sans TC", sans-serif;
    --transition-speed: 0.2s;
    --primary-color: #0d6efd;
    --secondary-color: #6c757d;
    --success-color: #198754;
    --danger-color: #dc3545;
    --light-gray: #f8f9fa;
    --border-color: #dee2e6;
    --body-bg: #f4f7f6; /* Softer background */
    --card-bg: #ffffff;
    --card-shadow: 0 0.125rem 0.25rem rgba(0, 0, 0, 0.075); /* Softer shadow */
    --hover-bg: rgba(0, 0, 0, 0.03);
}

html {
    height: 100%;
}

body {
    min-height: 100%; /* Use min-height with flex */
    margin: 0;
    font-family: var(--font-family-base);
    background-color: var(--body-bg);
    display: flex;
    flex-direction: column;
    font-size: 0.95rem; /* Slightly smaller base font */
    line-height: 1.6;
}

.page-container {
    flex: 1 0 auto;
}

/* Navbar */
.navbar {
    box-shadow: 0 0.125rem 0.25rem rgba(0, 0, 0, 0.1); /* Consistent shadow */
}
.user-role-display {
    font-size: 0.85em;
    opacity: 0.8;
    color: rgba(255, 255, 255, 0.8);
}
.dropdown-item {
    transition: background-color var(--transition-speed) ease-out, color var(--transition-speed) ease-out;
    font-size: 0.9rem;
}
.dropdown-item i {
    width: 1.2em;
    text-align: center;
    opacity: 0.7;
}
.dropdown-item:active {
    background-color: var(--primary-color);
    color: white !important;
}

/* Cards */
.card {
    border: none;
    position: relative;
    background-color: var(--card-bg);
    border-radius: 0.375rem; /* Bootstrap default */
    box-shadow: var(--card-shadow);
    transition: box-shadow var(--transition-speed) ease-in-out;
}
.card:hover {
     box-shadow: 0 0.25rem 0.5rem rgba(0, 0, 0, 0.1); /* Slightly larger shadow on hover */
}
.card .card-header {
    border-bottom: 1px solid var(--border-color);
    padding: 0.75rem 1.25rem;
    align-items: center;
    background-color: #fff; /* Keep header white */
}
.card .card-body {
    /* Padding removed for table cards */
}

/* Admin Section */
.admin-section {
    transition: background-color var(--transition-speed) ease-out;
    border-bottom: 1px solid var(--border-color);
}
.admin-section .dropdown-toggle {
    min-width: 150px;
    font-size: 0.9rem;
}
.admin-section .btn-sm {
    padding: 0.25rem 0.6rem;
    font-size: 0.875rem;
}

/* Table Styles */
.table {
    margin-bottom: 0;
}
.table thead th {
    border-bottom-width: 1px;
    padding: 0.8rem 1rem; /* Adjusted padding */
    vertical-align: middle;
    font-weight: 500; /* Medium weight header */
    font-size: 0.85rem;
    text-transform: uppercase; /* Optional: Uppercase headers */
    letter-spacing: 0.5px; /* Optional: Spacing */
    background-color: var(--light-gray); /* Use light gray for non-dark thead */
}
.table-dark thead th { /* Keep dark thead distinct */
     background-color: #212529;
     color: #fff;
     border-color: #32383e;
}
.table tbody td {
    vertical-align: middle;
    padding: 0.85rem 1rem; /* Adjusted padding */
    border-top: 1px solid var(--border-color); /* Add subtle top border */
}
.table-hover tbody tr {
    transition: background-color var(--transition-speed) ease-out;
}
.table-hover tbody tr:hover {
    background-color: var(--hover-bg);
}
.table .badge {
    vertical-align: middle; /* Changed alignment */
    font-weight: 500;
    padding: 0.3em 0.6em;
    font-size: 0.75rem; /* Smaller badge */
}
/* Table State Rows (Loading, Empty, Error) */
#loading-row td, #empty-row td, #error-row td {
    border-top: none; /* Remove border for state rows */
}

/* Progress Bar Styles */
.progress-bar { display: flex; flex-direction: column; justify-content: center; overflow: hidden; color: #fff; text-align: center; white-space: nowrap; background-color: var(--primary-color); transition: width 0.6s ease; }
.bg-success { background-color: var(--success-color) !important; }
.bg-purple { background-color: #6f42c1 !important; color: #fff; }
.bg-cyan { background-color: #0dcaf0 !important; color: #fff; }
.bg-red { background-color: var(--danger-color) !important; color: #fff; }
.progress { box-shadow: inset 0 0.1rem 0.1rem rgba(0, 0, 0, 0.1); height: 8px; background-color: #e9ecef; border-radius: 0.25rem; overflow: hidden; } /* Added overflow hidden */
.progress-text { font-size: 0.8em; margin-bottom: 0.25rem; color: var(--secondary-color); }

/* Action Buttons in Table */
.table td .btn-sm {
    padding: 0.25rem 0.5rem;
    font-size: 0.875rem;
    margin-left: 0.3rem;
    line-height: 1.4;
    transition: all var(--transition-speed) ease-out; /* Smooth all transitions */
}
.table td .btn-sm i {
    vertical-align: middle; /* Better icon alignment */
    margin: 0; /* Remove potential default margins */
}
.table td .btn-sm:hover {
    opacity: 0.9;
    transform: scale(1.05); /* Slightly larger on hover */
}
.table td .btn-sm:active {
    transform: scale(0.95); /* Press down effect */
}
/* Specific button colors on hover */
.table td .btn-primary:hover { background-color: #0b5ed7; border-color: #0a58ca; }
.table td .btn-outline-secondary:hover { background-color: #e2e6ea; border-color: #d3d9df; color: #000;}
.table td .btn-outline-danger:hover { background-color: #dc3545; border-color: #dc3545; color: #fff;}


/* Ranking Section */
.ranking-section { }
.ranking-1 { color: gold; font-weight: bold; }
.ranking-2 { color: silver; font-weight: bold; }
.ranking-3 { color: #cd7f32; font-weight: bold; }

/* Modal Styles */
.modal-header {
    background-color: var(--light-gray);
    border-bottom: 1px solid var(--border-color);
    padding: 1rem 1.5rem;
}
.modal-title {
    font-size: 1.1rem;
    font-weight: 500;
}
.modal-body {
    padding: 1.5rem;
}
.modal-footer {
    background-color: var(--light-gray);
    border-top: 1px solid var(--border-color);
    padding: 0.75rem 1.5rem;
}
#modalError {
    margin-top: 1rem;
    font-size: 0.9em;
    padding: 0.75rem 1rem;
}
#modalSubmitBtn .spinner-border { display: none; }
#modalSubmitBtn:disabled .spinner-border { display: inline-block; }
#modalSubmitBtn:disabled .submit-text { margin-right: 0.25rem; }
/* Style invalid feedback */
.was-validated .form-control:invalid, .form-control.is-invalid {
    border-color: var(--danger-color);
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 12 12' width='12' height='12' fill='none' stroke='%23dc3545'%3e%3ccircle cx='6' cy='6' r='4.5'/%3e%3cpath stroke-linejoin='round' d='M5.8 3.6h.4L6 6.5z'/%3e%3ccircle cx='6' cy='8.2' r='.6' fill='%23dc3545' stroke='none'/%3e%3c/svg%3e"); /* Bootstrap's SVG icon */
    background-repeat: no-repeat;
    background-position: right calc(0.375em + 0.1875rem) center;
    background-size: calc(0.75em + 0.375rem) calc(0.75em + 0.375rem);
}
.was-validated textarea.form-control:invalid, textarea.form-control.is-invalid {
     padding-right: calc(1.5em + 0.75rem); /* Ensure space for icon in textarea */
     background-position: top calc(0.375em + 0.1875rem) right calc(0.375em + 0.1875rem);
}


/* Footer */
.footer-container {
    flex-shrink: 0;
    width: 100%;
    font-size: 0.85em; /* Slightly smaller footer text */
    background: #e9ecef; /* Match light gray */
    color: var(--secondary-color);
    text-align: center;
    border-top: 1px solid var(--border-color);
}
.footer-container p {
    margin: 0;
    padding: 12px 0; /* Adjusted padding */
}

/* Responsive Adjustments */
@media (max-width: 768px) {
    .admin-section .btn-sm {
        font-size: 0.8rem;
        padding: 0.2rem 0.4rem;
    }
    .card .card-header h1, .card .card-header .fs-5 {
        font-size: 1.1rem;
    }
    .table thead th, .table tbody td {
        font-size: 0.85rem;
        padding: 0.7rem 0.75rem; /* Adjust padding for mobile */
    }
    .table td .btn-sm {
        margin-left: 0.2rem;
    }
    .modal-body, .modal-footer, .modal-header {
        padding-left: 1rem;
        padding-right: 1rem;
    }
    .modal-body { font-size: 0.9rem; }
}