/* Dark Theme CSS for Drossna */

/* Base theme variables */
:root {
    /* Light theme variables (default) */
    --body-bg: #f8fafc;
    --text-color: #212529;
    --card-bg: #fff;
    --card-header-bg: #f7f7f7;
    --input-bg: #fff;
    --input-border: #ced4da;
    --navbar-bg: #fff;
    --sidebar-primary: #4e73df;
    --sidebar-secondary: #224abe;
    --dropdown-bg: #fff;
    --dropdown-text: #212529;
    --dropdown-hover-bg: #f8f9fa;
    --btn-primary-bg: #4e73df;
    --btn-primary-text: #fff;
    --btn-secondary-bg: #6c757d;
    --btn-secondary-text: #fff;
    --border-color: #dee2e6;
    --shadow-color: rgba(0, 0, 0, 0.125);
}

/* Dark theme class that will be toggled */
body.dark-theme {
    /* Dark theme variables */
    --body-bg: #121212;
    --text-color: #e0e0e0;
    --card-bg: #1e1e1e;
    --card-header-bg: #2d2d2d;
    --input-bg: #2d2d2d;
    --input-border: #444;
    --navbar-bg: #1e1e1e;
    --sidebar-primary: #2d2d2d;
    --sidebar-secondary: #1e1e1e;
    --dropdown-bg: #2d2d2d;
    --dropdown-text: #e0e0e0;
    --dropdown-hover-bg: #3d3d3d;
    --btn-primary-bg: #3a56b5;
    --btn-primary-text: #fff;
    --btn-secondary-bg: #555;
    --btn-secondary-text: #fff;
    --border-color: #444;
    --shadow-color: rgba(0, 0, 0, 0.5);
}

/* Apply theme variables to elements */
body {
    background-color: var(--body-bg);
    color: var(--text-color);
}

/* Navbar styling */
.navbar {
    background-color: var(--navbar-bg);
    border-bottom: 1px solid var(--border-color);
}

.navbar-light .navbar-brand,
.navbar-light .navbar-nav .nav-link {
    color: var(--text-color);
}

/* Dashboard navbar styling for dark mode */
body.dark-theme .navbar,
body.dark-theme .navbar.navbar-light,
body.dark-theme .navbar.bg-white {
    background-color: var(--navbar-bg) !important;
    border-color: var(--border-color);
}

body.dark-theme .navbar-light .navbar-brand,
body.dark-theme .navbar-light .navbar-nav .nav-link,
body.dark-theme .navbar-light .text-gray-600,
body.dark-theme .topbar .text-gray-600 {
    color: var(--text-color) !important;
}

body.dark-theme .navbar-light .navbar-toggler-icon {
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' width='30' height='30' viewBox='0 0 30 30'%3e%3cpath stroke='rgba%28224, 224, 224, 0.75%29' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
}

body.dark-theme .navbar-light .navbar-toggler {
    border-color: rgba(224, 224, 224, 0.1);
}

/* Topbar search in dark mode */
body.dark-theme .navbar-search .input-group {
    border: 1px solid var(--border-color);
}

body.dark-theme .navbar-search .form-control {
    background-color: var(--input-bg);
    color: var(--text-color);
}

body.dark-theme .topbar .badge-counter {
    color: var(--btn-primary-text);
}

/* Sidebar styling */
.sidebar {
    background-color: var(--sidebar-primary);
    background-image: linear-gradient(180deg, var(--sidebar-primary) 10%, var(--sidebar-secondary) 100%);
}

/* Card styling */
.card {
    background-color: var(--card-bg);
    border-color: var(--border-color);
}

.card-header {
    background-color: var(--card-header-bg);
    border-bottom-color: var(--border-color);
    color: var(--text-color);
}

/* Signup Form Header Styling */
.card-header.bg-gradient-primary {
    background-image: linear-gradient(135deg, var(--sidebar-primary) 0%, var(--sidebar-secondary) 100%);
    padding: 1.5rem 1rem;
    position: relative;
    overflow: hidden;
    border-bottom: none;
}

.card-header.bg-gradient-primary::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -50%;
    width: 100%;
    height: 100%;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    transform: scale(0);
    transition: transform 0.6s ease-out;
}

.card-header.bg-gradient-primary:hover::before {
    transform: scale(2);
}

.card-header.bg-gradient-primary h4 {
    font-weight: 600;
    letter-spacing: 0.5px;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
    position: relative;
    z-index: 1;
}

body.dark-theme .card-header.bg-gradient-primary {
    background-image: linear-gradient(135deg, #3a56b5 0%, #1e1e1e 100%);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

/* Signup Form Header Pattern Overlay */
.card-header.bg-gradient-primary::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: url("data:image/svg+xml,%3Csvg width='20' height='20' viewBox='0 0 20 20' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='%23ffffff' fill-opacity='0.05' fill-rule='evenodd'%3E%3Ccircle cx='3' cy='3' r='3'/%3E%3Ccircle cx='13' cy='13' r='3'/%3E%3C/g%3E%3C/svg%3E");
    opacity: 0.5;
    z-index: 0;
}

/* Card body styling for dark theme */
body.dark-theme .card-body {
    background-color: #252525;
    border-radius: 0 0 0.25rem 0.25rem;
}

/* Teacher dashboard card columns styling for dark theme */
body.dark-theme .row .col-md-3 .card .card-body {
    background-color: #2d2d2d;
    border-radius: 0.25rem;
    transition: background-color 0.3s ease;
}

/* Form controls */
.form-control,
.form-select {
    background-color: var(--input-bg);
    border-color: var(--input-border);
    color: var(--text-color);
}

.form-control:focus,
.form-select:focus {
    border-color: var(--sidebar-primary);
    box-shadow: 0 0 0 0.25rem rgba(78, 115, 223, 0.25);
}

/* Form Labels */
.form-label {
    color: var(--text-color);
    font-weight: 500;
    margin-bottom: 0.5rem;
    transition: color 0.3s ease;
}

.form-text {
    color: var(--text-color);
    font-weight: 500;
    margin-bottom: 0.5rem;
    transition: color 0.3s ease;
}

.form-check-label {
    color: var(--text-color);
    font-weight: 500;
    margin-bottom: 0.5rem;
    transition: color 0.3s ease;
}

body.dark-theme .form-label {
    color: var(--text-color);
    opacity: 0.9;
}

body.dark-theme .form-group:focus-within .form-label,
body.dark-theme .mb-3:focus-within .form-label {
    color: var(--btn-primary-bg);
    opacity: 1;
}

/* Required field indicators */
body.dark-theme .text-danger {
    color: #ff6b6b !important;
}

body.dark-theme .form-label .text-danger {
    opacity: 1;
    font-weight: bold;
}

/* Column form labels */
.col-form-label {
    color: var(--text-color);
}

body.dark-theme .col-form-label {
    color: var(--text-color);
    opacity: 0.9;
}

body.dark-theme .form-group:focus-within .col-form-label,
body.dark-theme .mb-3:focus-within .col-form-label {
    color: var(--btn-primary-bg);
    opacity: 1;
}

/* Checkbox and Radio button labels */
.form-check-label {
    color: var(--text-color);
    transition: color 0.3s ease;
}

body.dark-theme .form-check-label {
    color: var(--text-color);
    opacity: 0.9;
}

body.dark-theme .form-check:hover .form-check-label {
    opacity: 1;
}


/* Form field focus state enhancement */
body.dark-theme .form-control:focus,
body.dark-theme .form-select:focus {
    border-color: var(--btn-primary-bg);
    box-shadow: 0 0 0 0.25rem rgba(58, 86, 181, 0.25);
}

/* Form validation states for dark theme */
body.dark-theme .was-validated .form-control:valid,
body.dark-theme .form-control.is-valid {
    border-color: #198754;
    background-color: rgba(25, 135, 84, 0.1);
}

body.dark-theme .was-validated .form-control:invalid,
body.dark-theme .form-control.is-invalid {
    border-color: #dc3545;
    background-color: rgba(220, 53, 69, 0.1);
}

/* Label animations */
body.dark-theme .form-floating>.form-control:focus~label,
body.dark-theme .form-floating>.form-control:not(:placeholder-shown)~label {
    color: var(--btn-primary-bg);
    opacity: 1;
}

/* Signup Form Styling */
.card-body.p-4 .input-group {
    transition: transform 0.2s ease;
}

.card-body.p-4 .input-group:focus-within {
    transform: translateY(-2px);
}

.card-body.p-4 .input-group-text {
    transition: background-color 0.3s ease;
}

.card-body.p-4 .input-group:focus-within .input-group-text {
    background-color: var(--sidebar-primary);
    color: white;
    border-color: var(--sidebar-primary);
}

.card-body.p-4 .form-label {
    font-size: 0.9rem;
    margin-bottom: 0.3rem;
    transition: color 0.3s ease;
}

.card-body.p-4 .input-group:focus-within+.invalid-feedback,
.card-body.p-4 .form-select:focus+.invalid-feedback {
    color: var(--sidebar-primary);
}

body.dark-theme .card-body.p-4 {
    background-color: var(--card-bg);
    border-radius: 0 0 0.5rem 0.5rem;
}

body.dark-theme .card-body.p-4 .input-group-text {
    background-color: rgba(255, 255, 255, 0.05);
    border-color: var(--input-border);
    color: var(--text-color);
}

body.dark-theme .card-body.p-4 .input-group:focus-within .input-group-text {
    background-color: var(--btn-primary-bg);
    color: white;
    border-color: var(--btn-primary-bg);
}

/* Dropdown menus */
.dropdown-menu {
    background-color: var(--dropdown-bg);
    border-color: var(--border-color);
}

.dropdown-item {
    color: var(--dropdown-text);
}

.dropdown-item:hover,
.dropdown-item:focus {
    background-color: var(--dropdown-hover-bg);
    color: var(--dropdown-text);
}

/* Buttons */
.btn-primary {
    background-color: var(--btn-primary-bg);
    border-color: var(--btn-primary-bg);
    color: var(--btn-primary-text);
}

.btn-secondary {
    background-color: var(--btn-secondary-bg);
    border-color: var(--btn-secondary-bg);
    color: var(--btn-secondary-text);
}

/* Signup Form Button Styling */
.card-body.p-4 .btn-primary {
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
    z-index: 1;
}

.card-body.p-4 .btn-primary::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(255, 255, 255, 0.1);
    z-index: -2;
}

.card-body.p-4 .btn-primary::before {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.1);
    transition: all 0.3s;
    z-index: -1;
}

.card-body.p-4 .btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.2);
}

.card-body.p-4 .btn-primary:hover::before {
    width: 100%;
}

.card-body.p-4 .btn-primary:active {
    transform: translateY(-1px);
    box-shadow: 0 5px 10px rgba(0, 0, 0, 0.2);
}

body.dark-theme .card-body.p-4 .btn-primary {
    background-color: var(--btn-primary-bg);
    border-color: var(--btn-primary-bg);
}

body.dark-theme .card-body.p-4 .btn-primary:hover {
    background-color: rgba(58, 86, 181, 0.9);
}

/* Signup Form Card Styling */
.card.border-0.shadow-lg.rounded-3.overflow-hidden {
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.card.border-0.shadow-lg.rounded-3.overflow-hidden:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.15);
}

body.dark-theme .card.border-0.shadow-lg.rounded-3.overflow-hidden {
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.5) !important;
    border: 1px solid rgba(255, 255, 255, 0.05) !important;
}

/* Registration page text styling for dark theme */
body.dark-theme .card-body .text-center h5 {
    color: var(--text-color) !important;
}

body.dark-theme .card-body .text-muted {
    color: rgba(224, 224, 224, 0.75) !important;
}

/* Feature cards styling for dark theme */
body.dark-theme .feature-card .card-text,
body.dark-theme .feature-card p,
body.dark-theme #features p {
    color: var(--text-color) !important;
}

/* Benefits Section styling for dark theme */
body.dark-theme #benefits.bg-light {
    background-color: var(--body-bg) !important;
}

body.dark-theme #benefits h2,
body.dark-theme #benefits h3,
body.dark-theme #benefits p,
body.dark-theme #benefits .lead,
body.dark-theme #benefits li,
body.dark-theme #benefits .card-title {
    color: var(--text-color) !important;
}

body.dark-theme #benefits .card {
    background-color: var(--card-bg);
    border-color: var(--border-color);
}

body.dark-theme #benefits .text-muted {
    color: var(--text-color) !important;
    opacity: 0.8;
}

/* Testimonials Section styling for dark theme */
body.dark-theme #testimonials h2,
body.dark-theme #testimonials h5,
body.dark-theme #testimonials p,
body.dark-theme #testimonials .lead {
    color: var(--text-color) !important;
}

body.dark-theme #testimonials .text-muted {
    color: var(--text-color) !important;
    opacity: 0.8;
}

/* CTA Section styling for dark theme */
body.dark-theme .cta-section {
    background-color: var(--body-bg) !important;
}

body.dark-theme .cta-section h2,
body.dark-theme .cta-section p,
body.dark-theme .cta-section .lead {
    color: var(--text-color) !important;
}

/* Contact Section styling for dark theme */
body.dark-theme #contact h2,
body.dark-theme #contact p,
body.dark-theme #contact .lead,
body.dark-theme #contact .form-label {
    color: var(--text-color) !important;
}

/* My Courses page styling for dark theme */
body.dark-theme .container p {
    color: var(--text-color) !important;
}

body.dark-theme [class*="courses"] p,
body.dark-theme [class*="my-courses"] p,
body.dark-theme [class*="courses"] h4,
body.dark-theme [class*="my-courses"] h4 {
    color: #fff !important;
}

/* Placeholder styling for dark theme */
body.dark-theme input::placeholder,
body.dark-theme textarea::placeholder,
body.dark-theme select::placeholder {
    color: rgba(224, 224, 224, 0.6) !important;
    opacity: 1;
}

/* Table styling */
.table {
    color: var(--text-color);
    border-color: var(--border-color);
}

body.dark-theme .table-striped>tbody>tr:nth-of-type(odd)>* {
    background-color: rgba(255, 255, 255, 0.05);
}

body.dark-theme .table-hover>tbody>tr:hover>* {
    background-color: rgba(255, 255, 255, 0.075);
}

/* Pagination */
.page-link {
    background-color: var(--card-bg);
    border-color: var(--border-color);
    color: var(--text-color);
}

.page-item.active .page-link {
    background-color: var(--btn-primary-bg);
    border-color: var(--btn-primary-bg);
}

/* Alerts */
.alert {
    border-color: var(--border-color);
}

/* Modal dialogs */
.modal-content {
    background-color: var(--card-bg);
    border-color: var(--border-color);
}

.modal-header,
.modal-footer {
    border-color: var(--border-color);
}

/* Transitions for smooth theme switching */
body,
.card,
.navbar,
.sidebar,
.form-control,
.btn,
.dropdown-menu,
.modal-content {
    transition: background-color 0.3s ease, color 0.3s ease, border-color 0.3s ease;
}