/* ============================================
   THEME FIXES - Color Contrast & Accessibility
   WCAG 2.1 AA Compliant
   ============================================ */

/* ===== ROOT THEME VARIABLES ===== */
:root {
    /* Light Mode Colors */
    --color-bg: #ffffff;
    --color-surface: #f8fafc;
    --color-surface-elevated: #ffffff;
    --color-text-primary: #0f172a;
    --color-text-secondary: #475569;
    --color-text-tertiary: #64748b;
    --color-text-muted: #94a3b8;
    --color-border: #e2e8f0;
    --color-border-light: #f1f5f9;
    --color-accent: #3b82f6;
    --color-accent-hover: #2563eb;
    
    /* Semantic Colors - Light Mode */
    --color-success: #10b981;
    --color-success-bg: #f0fdf4;
    --color-success-text: #15803d;
    --color-warning: #f59e0b;
    --color-warning-bg: #fefce8;
    --color-warning-text: #a16207;
    --color-error: #ef4444;
    --color-error-bg: #fef2f2;
    --color-error-text: #b91c1c;
    --color-info: #0ea5e9;
    --color-info-bg: #e0f2fe;
    --color-info-text: #0369a1;
}

/* ===== DARK MODE VARIABLES ===== */
html.dark-theme,
body.dark-theme {
    --color-bg: #0a0f1e;
    --color-surface: #1e293b;
    --color-surface-elevated: #334155;
    --color-text-primary: #f8fafc;
    --color-text-secondary: #cbd5e1;
    --color-text-tertiary: #94a3b8;
    --color-text-muted: #64748b;
    --color-border: #334155;
    --color-border-light: #475569;
    --color-accent: #60a5fa;
    --color-accent-hover: #93c5fd;
    
    /* Semantic Colors - Dark Mode */
    --color-success: #22c55e;
    --color-success-bg: rgba(16, 185, 129, 0.15);
    --color-success-text: #6ee7b7;
    --color-warning: #fbbf24;
    --color-warning-bg: rgba(245, 158, 11, 0.15);
    --color-warning-text: #fcd34d;
    --color-error: #f87171;
    --color-error-bg: rgba(239, 68, 68, 0.15);
    --color-error-text: #fca5a5;
    --color-info: #38bdf8;
    --color-info-bg: rgba(14, 165, 233, 0.15);
    --color-info-text: #93c5fd;
}

/* ===== UNIVERSAL TEXT FIXES ===== */
/* Ensure all text elements use theme-aware colors */
body {
    color: var(--color-text-primary);
    background-color: var(--color-bg);
}

h1, h2, h3, h4, h5, h6 {
    color: var(--color-text-primary);
}

p, span, li {
    color: var(--color-text-secondary);
}

small, .text-small {
    color: var(--color-text-tertiary);
}

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

/* ===== LINK FIXES ===== */
a:not([class]) {
    color: var(--color-accent);
}

a:not([class]):hover {
    color: var(--color-accent-hover);
}

/* ===== BUTTON CONTRAST FIXES ===== */
/* Ensure buttons have proper contrast in both modes */
.btn {
    color: var(--color-text-primary);
}

.btn-primary,
.btn-accent {
    background: var(--color-accent);
    color: #ffffff;
    border-color: var(--color-accent);
}

.btn-primary:hover,
.btn-accent:hover {
    background: var(--color-accent-hover);
    border-color: var(--color-accent-hover);
    color: #ffffff;
}

.btn-secondary {
    background: var(--color-surface);
    color: var(--color-text-primary);
    border: 1px solid var(--color-border);
}

.btn-secondary:hover {
    background: var(--color-surface-elevated);
    border-color: var(--color-border-light);
}

.btn-success {
    background: var(--color-success);
    color: #ffffff;
}

.btn-warning {
    background: var(--color-warning);
    color: #ffffff;
}

.btn-danger,
.btn-error {
    background: var(--color-error);
    color: #ffffff;
}

/* ===== INPUT CONTRAST FIXES ===== */
input,
textarea,
select {
    background: var(--color-surface);
    color: var(--color-text-primary);
    border-color: var(--color-border);
}

input::placeholder,
textarea::placeholder {
    color: var(--color-text-muted);
}

input:focus,
textarea:focus,
select:focus {
    border-color: var(--color-accent);
    background: var(--color-bg);
}

/* Dark mode specific input fixes */
html.dark-theme input,
html.dark-theme textarea,
html.dark-theme select,
body.dark-theme input,
body.dark-theme textarea,
body.dark-theme select {
    background: rgba(15, 23, 42, 0.6);
    color: var(--color-text-primary);
    border-color: var(--color-border);
}

html.dark-theme input:focus,
html.dark-theme textarea:focus,
html.dark-theme select:focus,
body.dark-theme input:focus,
body.dark-theme textarea:focus,
body.dark-theme select:focus {
    background: rgba(15, 23, 42, 0.8);
    border-color: var(--color-accent);
}

/* ===== CARD CONTRAST FIXES ===== */
.card,
.course-card,
.feature-item {
    background: var(--color-surface);
    color: var(--color-text-primary);
    border-color: var(--color-border);
}

.card h1,
.card h2,
.card h3,
.card h4,
.card h5,
.card h6 {
    color: var(--color-text-primary);
}

.card p,
.card-text {
    color: var(--color-text-secondary);
}

/* ===== ALERT CONTRAST FIXES ===== */
.alert {
    border-radius: 8px;
    padding: 12px 16px;
}

.alert-success {
    background: var(--color-success-bg);
    color: var(--color-success-text);
    border-left: 4px solid var(--color-success);
}

.alert-warning {
    background: var(--color-warning-bg);
    color: var(--color-warning-text);
    border-left: 4px solid var(--color-warning);
}

.alert-error,
.alert-danger {
    background: var(--color-error-bg);
    color: var(--color-error-text);
    border-left: 4px solid var(--color-error);
}

.alert-info {
    background: var(--color-info-bg);
    color: var(--color-info-text);
    border-left: 4px solid var(--color-info);
}

/* ===== TABLE CONTRAST FIXES ===== */
table {
    color: var(--color-text-primary);
}

thead {
    background: var(--color-surface-elevated);
    color: var(--color-text-primary);
}

tbody tr {
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
}

tbody tr:hover {
    background: var(--color-surface-elevated);
}

tbody td {
    color: var(--color-text-secondary);
}

/* Dark mode table fixes */
html.dark-theme thead,
body.dark-theme thead {
    background: rgba(30, 41, 59, 0.8);
}

html.dark-theme tbody tr,
body.dark-theme tbody tr {
    background: rgba(15, 23, 42, 0.4);
}

html.dark-theme tbody tr:hover,
body.dark-theme tbody tr:hover {
    background: rgba(30, 41, 59, 0.6);
}

/* ===== BADGE CONTRAST FIXES ===== */
.badge {
    font-weight: 600;
    padding: 4px 12px;
    border-radius: 12px;
}

.badge-primary {
    background: var(--color-accent);
    color: #ffffff;
}

.badge-success {
    background: var(--color-success);
    color: #ffffff;
}

.badge-warning {
    background: var(--color-warning);
    color: #ffffff;
}

.badge-danger,
.badge-error {
    background: var(--color-error);
    color: #ffffff;
}

/* Dark mode badge adjustments */
html.dark-theme .badge-primary,
body.dark-theme .badge-primary {
    background: rgba(96, 165, 250, 0.25);
    color: #93c5fd;
}

html.dark-theme .badge-success,
body.dark-theme .badge-success {
    background: rgba(34, 197, 94, 0.25);
    color: #6ee7b7;
}

html.dark-theme .badge-warning,
body.dark-theme .badge-warning {
    background: rgba(251, 191, 36, 0.25);
    color: #fcd34d;
}

html.dark-theme .badge-danger,
html.dark-theme .badge-error,
body.dark-theme .badge-danger,
body.dark-theme .badge-error {
    background: rgba(248, 113, 113, 0.25);
    color: #fca5a5;
}

/* ===== MODAL CONTRAST FIXES ===== */
.modal,
.modal-content {
    background: var(--color-surface);
    color: var(--color-text-primary);
}

.modal-header {
    border-bottom: 1px solid var(--color-border);
}

.modal-footer {
    border-top: 1px solid var(--color-border);
}

/* ===== DROPDOWN CONTRAST FIXES ===== */
.dropdown-menu {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
}

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

.dropdown-item:hover {
    background: var(--color-surface-elevated);
}

/* ===== NAVIGATION CONTRAST FIXES ===== */
.nav-links a,
.navbar a {
    color: var(--color-text-primary);
}

.nav-links a:hover,
.navbar a:hover {
    color: var(--color-accent);
}

/* ===== FOOTER CONTRAST FIXES ===== */
.footer {
    background: var(--color-surface);
    color: var(--color-text-secondary);
    border-top: 1px solid var(--color-border);
}

.footer a {
    color: var(--color-text-secondary);
}

.footer a:hover {
    color: var(--color-accent);
}

.footer h3,
.footer h4 {
    color: var(--color-text-primary);
}

/* Dark mode footer */
html.dark-theme .footer,
body.dark-theme .footer {
    background: rgba(15, 23, 42, 0.95);
    border-top-color: rgba(96, 165, 250, 0.2);
}

/* ===== FORM LABEL FIXES ===== */
label,
.form-label {
    color: var(--color-text-primary);
    font-weight: 500;
}

.form-help,
.help-text {
    color: var(--color-text-muted);
    font-size: 0.875rem;
}

/* ===== ERROR MESSAGE FIXES ===== */
.error-message,
.validation-error {
    color: var(--color-error-text);
    font-size: 0.875rem;
}

.success-message,
.validation-success {
    color: var(--color-success-text);
    font-size: 0.875rem;
}

/* ===== CODE BLOCK FIXES ===== */
code {
    background: var(--color-surface-elevated);
    color: var(--color-accent);
    padding: 2px 6px;
    border-radius: 4px;
}

pre {
    background: var(--color-surface-elevated);
    color: var(--color-text-primary);
    padding: 16px;
    border-radius: 8px;
    border: 1px solid var(--color-border);
}

pre code {
    background: transparent;
    padding: 0;
}

/* Dark mode code blocks */
html.dark-theme code,
body.dark-theme code {
    background: rgba(96, 165, 250, 0.1);
    color: #93c5fd;
}

html.dark-theme pre,
body.dark-theme pre {
    background: rgba(15, 23, 42, 0.8);
    border-color: rgba(96, 165, 250, 0.2);
}

/* ===== BREADCRUMB FIXES ===== */
.breadcrumb {
    color: var(--color-text-tertiary);
}

.breadcrumb a {
    color: var(--color-text-secondary);
}

.breadcrumb a:hover {
    color: var(--color-accent);
}

/* ===== PAGINATION FIXES ===== */
.pagination a,
.pagination span {
    color: var(--color-text-primary);
    background: var(--color-surface);
    border: 1px solid var(--color-border);
}

.pagination a:hover {
    background: var(--color-surface-elevated);
    border-color: var(--color-accent);
}

.pagination .active {
    background: var(--color-accent);
    color: #ffffff;
    border-color: var(--color-accent);
}

/* ===== TOOLTIP FIXES ===== */
.tooltip {
    background: var(--color-surface-elevated);
    color: var(--color-text-primary);
    border: 1px solid var(--color-border);
}

/* Dark mode tooltips */
html.dark-theme .tooltip,
body.dark-theme .tooltip {
    background: rgba(30, 41, 59, 0.95);
    border-color: rgba(96, 165, 250, 0.3);
    color: var(--color-text-primary);
}

/* ===== ACCESSIBILITY - FOCUS STATES ===== */
*:focus {
    outline: 2px solid var(--color-accent);
    outline-offset: 2px;
}

button:focus,
a:focus,
input:focus,
select:focus,
textarea:focus {
    outline: 2px solid var(--color-accent);
    outline-offset: 2px;
}

/* ===== HIGH CONTRAST MODE SUPPORT ===== */
@media (prefers-contrast: high) {
    :root {
        --color-text-primary: #000000;
        --color-text-secondary: #1a1a1a;
        --color-border: #000000;
    }
    
    html.dark-theme,
    body.dark-theme {
        --color-text-primary: #ffffff;
        --color-text-secondary: #f0f0f0;
        --color-border: #ffffff;
    }
}

/* ===== PRINT MODE FIXES ===== */
@media print {
    body {
        color: #000000;
        background: #ffffff;
    }
    
    .card,
    .course-card {
        border: 1px solid #000000;
    }
    
    a {
        color: #000000;
        text-decoration: underline;
    }
}