/**
 * Enhanced UI Stylesheet
 * A modern, clean, and professional UI upgrade for the Survey System
 */

:root {
    /* Color palette */
    --primary: #4361ee;
    --primary-light: #5e7bff;
    --primary-dark: #3a56d4;
    --secondary: #7209b7;
    --success: #28a745;
    --info: #17a2b8;
    --warning: #ffc107;
    --danger: #dc3545;
    --light: #f8f9fa;
    --dark: #343a40;
    --gray-100: #f8f9fa;
    --gray-200: #e9ecef;
    --gray-300: #dee2e6;
    --gray-400: #ced4da;
    --gray-500: #adb5bd;
    --gray-600: #6c757d;
    --gray-700: #495057;
    --gray-800: #343a40;
    --gray-900: #212529;

    /* Typography */
    --font-family-sans-serif: 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    --font-family-monospace: 'SFMono-Regular', Menlo, Monaco, Consolas, monospace;
    
    /* Spacing */
    --spacing-1: 0.25rem;
    --spacing-2: 0.5rem;
    --spacing-3: 1rem;
    --spacing-4: 1.5rem;
    --spacing-5: 3rem;
    
    /* Borders */
    --border-radius-sm: 0.25rem;
    --border-radius: 0.5rem;
    --border-radius-lg: 1rem;
    --border-radius-xl: 1.5rem;
    --border-width: 1px;
    
    /* Shadows */
    --shadow-sm: 0 0.125rem 0.25rem rgba(0, 0, 0, 0.075);
    --shadow: 0 0.5rem 1rem rgba(0, 0, 0, 0.10);
    --shadow-lg: 0 1rem 2rem rgba(0, 0, 0, 0.15);
    
    /* Transitions */
    --transition-base: all 0.3s ease-in-out;
    --transition-fast: all 0.15s ease-in-out;
    --transition-slow: all 0.6s ease-in-out;
}

/*--------------------------------------------------------------
# Global Styles
--------------------------------------------------------------*/

body {
    font-family: var(--font-family-sans-serif);
    color: var(--gray-800);
    background-color: #f5f7fa;
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    overflow-x: hidden;
}

a {
    text-decoration: none;
    transition: var(--transition-base);
}

a:hover {
    text-decoration: none;
}

.content-wrapper {
    flex: 1;
}

/*--------------------------------------------------------------
# Typography Enhancements
--------------------------------------------------------------*/

h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.3;
    color: var(--gray-900);
    margin-bottom: 1rem;
}

h1 {
    font-size: 2.5rem;
    position: relative;
    padding-bottom: 0.5rem;
}

h1:after {
    content: '';
    position: absolute;
    left: 0;
    bottom: 0;
    height: 4px;
    width: 70px;
    background: linear-gradient(90deg, var(--primary), var(--secondary));
    border-radius: 2px;
}

h2 {
    font-size: 2rem;
}

h3 {
    font-size: 1.75rem;
}

h4 {
    font-size: 1.5rem;
}

h5 {
    font-size: 1.25rem;
}

h6 {
    font-size: 1rem;
}

p {
    margin-bottom: 1.5rem;
    color: var(--gray-700);
}

.text-muted {
    color: var(--gray-600) !important;
}

.lead {
    font-size: 1.25rem;
    font-weight: 400;
}

/*--------------------------------------------------------------
# Navigation Enhancements
--------------------------------------------------------------*/

.navbar {
    box-shadow: 0 2px 15px rgba(0, 0, 0, 0.1);
    transition: var(--transition-base);
    padding: 1rem 0;
}

.navbar-brand {
    font-weight: 700;
    font-size: 1.4rem;
    padding: 0;
}

.navbar-dark {
    background: linear-gradient(135deg, var(--primary), var(--secondary)) !important;
}

.navbar-dark .navbar-brand,
.navbar-dark .nav-link {
    color: white !important;
}

.navbar-nav .nav-link {
    font-weight: 500;
    position: relative;
    padding: 0.5rem 1rem;
}

.navbar-dark .nav-link:before {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    bottom: 0;
    left: 50%;
    background-color: white;
    transition: var(--transition-base);
    transform: translateX(-50%);
}

.navbar-dark .nav-link:hover:before,
.navbar-dark .nav-link.active:before {
    width: 50%;
}

.dropdown-menu {
    box-shadow: var(--shadow);
    border: none;
    border-radius: var(--border-radius);
    padding: 0.5rem;
}

.dropdown-item {
    border-radius: var(--border-radius-sm);
    padding: 0.5rem 1rem;
    font-weight: 500;
}

.dropdown-item:hover {
    background-color: var(--gray-100);
}

/*--------------------------------------------------------------
# Card Enhancements
--------------------------------------------------------------*/

.card {
    border: none;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    transition: var(--transition-base);
    overflow: hidden;
    margin-bottom: 1.5rem;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.card-header {
    background: linear-gradient(to right, #f8f9fa, #ffffff);
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
    padding: 1.25rem 1.5rem;
}

.card-header h5 {
    margin-bottom: 0;
    font-weight: 600;
    display: flex;
    align-items: center;
}

.card-header h5 i {
    margin-right: 0.75rem;
    color: var(--primary);
}

.card-body {
    padding: 1.5rem;
}

.card-footer {
    background-color: rgba(0, 0, 0, 0.02);
    border-top: 1px solid rgba(0, 0, 0, 0.05);
    padding: 1rem 1.5rem;
}

/*--------------------------------------------------------------
# Button Enhancements
--------------------------------------------------------------*/

.btn {
    border-radius: var(--border-radius);
    font-weight: 500;
    padding: 0.5rem 1.25rem;
    transition: var(--transition-base);
    border: none;
    position: relative;
    overflow: hidden;
}

.btn::after {
    content: '';
    position: absolute;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    background: rgba(255, 255, 255, 0.2);
    border-radius: inherit;
    transform: scale(0);
    opacity: 0;
    transition: transform 0.5s, opacity 0.3s;
}

.btn:active::after {
    transform: scale(2);
    opacity: 0;
    transition: 0s;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    box-shadow: 0 4px 10px rgba(67, 97, 238, 0.3);
}

.btn-primary:hover {
    background: linear-gradient(135deg, var(--primary-dark), var(--primary));
    box-shadow: 0 6px 15px rgba(67, 97, 238, 0.4);
}

.btn-secondary {
    background: linear-gradient(135deg, var(--secondary), #6008a3);
    box-shadow: 0 4px 10px rgba(114, 9, 183, 0.3);
}

.btn-secondary:hover {
    background: linear-gradient(135deg, #6008a3, var(--secondary));
    box-shadow: 0 6px 15px rgba(114, 9, 183, 0.4);
}

.btn-success {
    background: linear-gradient(135deg, var(--success), #218838);
    box-shadow: 0 4px 10px rgba(40, 167, 69, 0.3);
}

.btn-success:hover {
    background: linear-gradient(135deg, #218838, var(--success));
    box-shadow: 0 6px 15px rgba(40, 167, 69, 0.4);
}

.btn-danger {
    background: linear-gradient(135deg, var(--danger), #bd2130);
    box-shadow: 0 4px 10px rgba(220, 53, 69, 0.3);
}

.btn-danger:hover {
    background: linear-gradient(135deg, #bd2130, var(--danger));
    box-shadow: 0 6px 15px rgba(220, 53, 69, 0.4);
}

.btn-outline-primary {
    color: var(--primary);
    border: 1px solid var(--primary);
}

.btn-outline-primary:hover {
    color: white;
    background-color: var(--primary);
}

/*--------------------------------------------------------------
# Form Control Enhancements
--------------------------------------------------------------*/

.form-control {
    border-radius: var(--border-radius);
    padding: 0.75rem 1rem;
    border-color: var(--gray-300);
    box-shadow: none;
    transition: var(--transition-base);
}

.form-control:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 0.2rem rgba(67, 97, 238, 0.15);
}

.form-label {
    font-weight: 500;
    margin-bottom: 0.5rem;
    color: var(--gray-700);
}

.form-text {
    color: var(--gray-600);
    font-size: 0.875rem;
    margin-top: 0.25rem;
}

.form-select {
    border-radius: var(--border-radius);
    padding: 0.75rem 2.25rem 0.75rem 1rem;
    border-color: var(--gray-300);
    box-shadow: none;
    transition: var(--transition-base);
}

.form-select:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 0.2rem rgba(67, 97, 238, 0.15);
}

.form-check-input {
    width: 1.25em;
    height: 1.25em;
    margin-top: 0.15em;
    border-color: var(--gray-400);
}

.form-check-input:checked {
    background-color: var(--primary);
    border-color: var(--primary);
}

.form-switch .form-check-input {
    width: 2.5em;
    height: 1.25em;
}

.form-check-label {
    font-weight: 400;
    color: var(--gray-700);
}

/*--------------------------------------------------------------
# Table Enhancements
--------------------------------------------------------------*/

.table {
    border-collapse: separate;
    border-spacing: 0;
    border-radius: var(--border-radius);
    overflow: hidden;
}

.table thead th {
    background-color: var(--gray-100);
    border-bottom: 2px solid var(--gray-200);
    padding: 0.75rem 1rem;
    font-weight: 600;
    text-transform: uppercase;
    font-size: 0.8rem;
    letter-spacing: 0.5px;
    color: var(--gray-700);
}

.table tbody tr {
    transition: var(--transition-base);
}

.table tbody tr:hover {
    background-color: rgba(67, 97, 238, 0.03);
}

.table tbody td {
    padding: 1rem;
    vertical-align: middle;
    border-top: 1px solid var(--gray-200);
}

.table-striped tbody tr:nth-of-type(odd) {
    background-color: rgba(0, 0, 0, 0.02);
}

/*--------------------------------------------------------------
# Alert Enhancements
--------------------------------------------------------------*/

.alert {
    border: none;
    border-radius: var(--border-radius);
    padding: 1rem 1.5rem;
    margin-bottom: 1.5rem;
    box-shadow: var(--shadow-sm);
}

.alert-primary {
    background-color: rgba(67, 97, 238, 0.1);
    color: var(--primary);
}

.alert-secondary {
    background-color: rgba(114, 9, 183, 0.1);
    color: var(--secondary);
}

.alert-success {
    background-color: rgba(40, 167, 69, 0.1);
    color: var(--success);
}

.alert-danger {
    background-color: rgba(220, 53, 69, 0.1);
    color: var(--danger);
}

.alert-warning {
    background-color: rgba(255, 193, 7, 0.1);
    color: #856404;
}

.alert-info {
    background-color: rgba(23, 162, 184, 0.1);
    color: var(--info);
}

/*--------------------------------------------------------------
# Dashboard Enhancements
--------------------------------------------------------------*/

.dashboard-header {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    padding: 2rem 0;
    margin-bottom: 2rem;
    color: white;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow);
}

.dashboard-header h1 {
    color: white;
    margin-bottom: 0;
}

.dashboard-header h1:after {
    display: none;
}

.dashboard-header p {
    opacity: 0.8;
    margin-bottom: 0;
    color: white;
}

.stat-card {
    height: 100%;
    border-radius: var(--border-radius);
    padding: 1.5rem;
    background-color: white;
    box-shadow: var(--shadow);
    transition: var(--transition-base);
    border-left: 4px solid var(--primary);
}

.stat-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.stat-card .stat-icon {
    font-size: 2.5rem;
    color: var(--primary);
    opacity: 0.8;
}

.stat-card .stat-value {
    font-size: 2rem;
    font-weight: 700;
    color: var(--gray-800);
    margin: 0.5rem 0;
}

.stat-card .stat-label {
    font-size: 0.875rem;
    color: var(--gray-600);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.activity-card {
    height: 100%;
}

.activity-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.activity-item {
    display: flex;
    padding: 1rem 0;
    border-bottom: 1px solid var(--gray-200);
}

.activity-item:last-child {
    border-bottom: none;
}

.activity-icon {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background-color: rgba(67, 97, 238, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary);
    margin-right: 1rem;
}

.activity-content {
    flex: 1;
}

.activity-title {
    font-weight: 500;
    margin-bottom: 0.25rem;
}

.activity-time {
    font-size: 0.75rem;
    color: var(--gray-600);
}

/*--------------------------------------------------------------
# Survey Builder Enhancements
--------------------------------------------------------------*/

.survey-builder {
    background: white;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    padding: 2rem;
    margin-bottom: 2rem;
}

.question-block {
    background: white;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-sm);
    padding: 1.5rem;
    margin-bottom: 1.5rem;
    transition: var(--transition-base);
    border-left: 3px solid var(--primary);
}

.question-block:hover {
    box-shadow: var(--shadow);
}

.question-block .drag-handle {
    cursor: grab;
    color: var(--gray-500);
    padding: 0.5rem;
    border-radius: 50%;
    transition: var(--transition-base);
}

.question-block .drag-handle:hover {
    background-color: var(--gray-100);
    color: var(--gray-700);
}

.question-controls {
    display: flex;
    gap: 0.5rem;
}

.question-types {
    background: white;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    position: sticky;
    top: 2rem;
}

.question-types .list-group-item {
    border: none;
    border-bottom: 1px solid var(--gray-200);
    padding: 1rem;
    transition: var(--transition-base);
    cursor: grab;
}

.question-types .list-group-item:last-child {
    border-bottom: none;
}

.question-types .list-group-item:hover {
    background-color: var(--gray-100);
}

.question-types .list-group-item i {
    color: var(--primary);
    margin-right: 0.75rem;
}

.question-list {
    min-height: 200px;
    padding: 1.5rem;
    border: 2px dashed var(--gray-300);
    border-radius: var(--border-radius);
    background-color: var(--gray-100);
    transition: var(--transition-base);
}

.question-list.drag-over {
    background-color: var(--gray-200);
    border-color: var(--primary);
}

/*--------------------------------------------------------------
# Survey Response Enhancements
--------------------------------------------------------------*/

.response-filters {
    background: white;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    padding: 1.5rem;
    margin-bottom: 2rem;
}

.response-card {
    background: white;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-sm);
    padding: 1.5rem;
    margin-bottom: 1.5rem;
    transition: var(--transition-base);
}

.response-card:hover {
    box-shadow: var(--shadow);
}

.response-meta {
    padding-bottom: 1rem;
    margin-bottom: 1rem;
    border-bottom: 1px solid var(--gray-200);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.response-question {
    font-weight: 500;
    margin-bottom: 0.5rem;
}

.response-answer {
    background-color: var(--gray-100);
    border-radius: var(--border-radius-sm);
    padding: 1rem;
}

/*--------------------------------------------------------------
# Chart Enhancements
--------------------------------------------------------------*/

.chart-container {
    position: relative;
    margin-bottom: 2rem;
    background: white;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    padding: 1.5rem;
}

.chart-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
    color: var(--gray-800);
}

.chart-legend {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    margin-top: 1rem;
}

.legend-item {
    display: flex;
    align-items: center;
    margin-right: 1rem;
    margin-bottom: 0.5rem;
}

.legend-color {
    width: 16px;
    height: 16px;
    border-radius: 3px;
    margin-right: 0.5rem;
}

.legend-label {
    font-size: 0.875rem;
    color: var(--gray-700);
}

/*--------------------------------------------------------------
# Pagination Enhancements
--------------------------------------------------------------*/

.pagination {
    margin-top: 2rem;
    margin-bottom: 2rem;
    justify-content: center;
}

.page-link {
    border: none;
    color: var(--gray-700);
    padding: 0.5rem 1rem;
    margin: 0 0.25rem;
    border-radius: var(--border-radius-sm);
    transition: var(--transition-base);
}

.page-link:hover {
    background-color: var(--gray-200);
    color: var(--gray-900);
}

.page-item.active .page-link {
    background-color: var(--primary);
    color: white;
    box-shadow: 0 4px 10px rgba(67, 97, 238, 0.3);
}

.page-item.disabled .page-link {
    color: var(--gray-500);
    background-color: transparent;
}

/*--------------------------------------------------------------
# Footer Enhancements
--------------------------------------------------------------*/

.footer {
    background-color: white;
    box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.05);
    padding: 2rem 0;
    margin-top: 3rem;
}

.footer p {
    margin-bottom: 0;
}

/*--------------------------------------------------------------
# Responsive Adjustments
--------------------------------------------------------------*/

@media (max-width: 992px) {
    h1 {
        font-size: 2rem;
    }
    
    .dashboard-header {
        padding: 1.5rem 0;
    }
    
    .card-body {
        padding: 1.25rem;
    }
}

@media (max-width: 768px) {
    h1 {
        font-size: 1.75rem;
    }
    
    .navbar {
        padding: 0.75rem 0;
    }
    
    .question-types {
        position: relative;
        top: 0;
        margin-bottom: 2rem;
    }
    
    .stat-card .stat-value {
        font-size: 1.5rem;
    }
}

@media (max-width: 576px) {
    .container {
        padding-left: 1rem;
        padding-right: 1rem;
    }
    
    .card-header {
        padding: 1rem;
    }
    
    .card-body {
        padding: 1rem;
    }
    
    .btn {
        padding: 0.5rem 1rem;
    }
}

/*--------------------------------------------------------------
# Animations
--------------------------------------------------------------*/

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

.fade-in {
    animation: fadeIn 0.5s ease-out forwards;
}

@keyframes pulse {
    0% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.05);
    }
    100% {
        transform: scale(1);
    }
}

.pulse {
    animation: pulse 2s infinite;
}

/*--------------------------------------------------------------
# Custom Components
--------------------------------------------------------------*/

/* Status Badge */
.status-badge {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    border-radius: 50px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.status-badge-draft {
    background-color: var(--gray-200);
    color: var(--gray-700);
}

.status-badge-published {
    background-color: rgba(40, 167, 69, 0.1);
    color: var(--success);
}

.status-badge-closed {
    background-color: rgba(220, 53, 69, 0.1);
    color: var(--danger);
}

/* Toast Notifications */
.toast-container {
    position: fixed;
    bottom: 1.5rem;
    right: 1.5rem;
    z-index: 9999;
}

.custom-toast {
    background: white;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-lg);
    padding: 1rem;
    margin-bottom: 1rem;
    min-width: 250px;
    max-width: 350px;
    transform: translateY(100px);
    opacity: 0;
    transition: var(--transition-base);
}

.custom-toast.show {
    transform: translateY(0);
    opacity: 1;
}

.toast-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.5rem;
}

.toast-title {
    font-weight: 600;
    color: var(--gray-800);
}

.toast-body {
    color: var(--gray-700);
}

/* Loading Spinner */
.spinner {
    width: 40px;
    height: 40px;
    margin: 100px auto;
    background-color: var(--primary);
    border-radius: 100%;
    animation: sk-scaleout 1.0s infinite ease-in-out;
}

@keyframes sk-scaleout {
    0% { 
        transform: scale(0);
    } 
    100% {
        transform: scale(1.0);
        opacity: 0;
    }
}

/* QR Code Container */
.qr-code-container {
    background: white;
    padding: 1.5rem;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    text-align: center;
    margin-bottom: 2rem;
}

.qr-code-img {
    padding: 1rem;
    background: white;
    border: 1px solid var(--gray-200);
    border-radius: var(--border-radius);
    display: inline-block;
    margin-bottom: 1rem;
}

/* Copy Button With Animation */
.copy-btn {
    position: relative;
    overflow: hidden;
}

.copy-btn .default-text,
.copy-btn .success-text {
    transition: var(--transition-base);
}

.copy-btn.copied .default-text {
    transform: translateY(-100%);
    opacity: 0;
}

.copy-btn.copied .success-text {
    transform: translateY(-100%);
    opacity: 1;
}

.success-text {
    position: absolute;
    left: 0;
    right: 0;
    top: 100%;
    opacity: 0;
}

/* User Avatar */
.user-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    overflow: hidden;
    background-color: var(--gray-200);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    color: var(--gray-600);
}

.user-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

/* Rating Stars */
.star-rating {
    display: flex;
    align-items: center;
    font-size: 1.25rem;
    color: #ffc107;
}

.star-rating .far {
    color: var(--gray-300);
}

/* Tooltips */
.tooltip-inner {
    background-color: var(--gray-900);
    border-radius: var(--border-radius-sm);
    font-size: 0.875rem;
    padding: 0.5rem 1rem;
}

/* Survey Progress Bar */
.survey-progress {
    height: 8px;
    border-radius: 4px;
    background-color: var(--gray-200);
    margin-bottom: 2rem;
    overflow: hidden;
}

.survey-progress-bar {
    height: 100%;
    background: linear-gradient(90deg, var(--primary), var(--secondary));
    border-radius: 4px;
    transition: width 0.5s ease;
}