/* Enhanced Styles for CSUN English Graduate Program Website */

/* ===== CSS VARIABLES FOR CONSISTENT THEMING ===== */
:root {
    /* Color Palette - WCAG AA Compliant */
    --primary-color: #d22030; /* CSUN Red */
    --primary-dark: #b01e2c;
    --secondary-color: #2c3e50;
    --accent-color: #3498db;
    --text-primary: #2c3e50;
    --text-secondary: #5a6c7d;
    --text-muted: #6c757d;
    --background-light: #f8f9fa;
    --background-white: #ffffff;
    --border-color: #dee2e6;
    --shadow-light: 0 2px 4px rgba(0,0,0,0.1);
    --shadow-medium: 0 4px 8px rgba(0,0,0,0.15);
    --shadow-strong: 0 8px 16px rgba(0,0,0,0.2);

    /* Typography Scale */
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.875rem;
    --font-size-4xl: 2.25rem;

    /* Spacing Scale */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;

    /* Border Radius */
    --radius-sm: 0.25rem;
    --radius-md: 0.375rem;
    --radius-lg: 0.5rem;
    --radius-xl: 0.75rem;
}

/* ===== IMPROVED TYPOGRAPHY ===== */
body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--background-light);
    font-size: var(--font-size-base);
}

/* Improved heading hierarchy with better contrast */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.3;
    margin-bottom: var(--space-md);
    color: var(--text-primary);
}

h1 {
    font-size: var(--font-size-4xl);
    margin-bottom: var(--space-xl);
    border-bottom: 3px solid var(--primary-color);
    padding-bottom: var(--space-md);
}

h2 {
    font-size: var(--font-size-3xl);
    margin-top: var(--space-2xl);
    margin-bottom: var(--space-lg);
    color: var(--primary-color);
}

h3 {
    font-size: var(--font-size-2xl);
    margin-top: var(--space-xl);
    color: var(--secondary-color);
}

h4 {
    font-size: var(--font-size-xl);
    margin-top: var(--space-lg);
}

/* Better paragraph spacing and readability */
p {
    margin-bottom: var(--space-lg);
    max-width: 100%; /* Use full available width */
    line-height: 1.7; /* Improved readability */
}

/* Enhanced content readability */
#page-content p {
    max-width: 100%; /* Use full available width */
}

/* Responsive text width - use percentage-based limits for better screen utilization */
@media (min-width: 768px) {
    p {
        max-width: 100%;
    }

    #page-content p {
        max-width: 100%;
    }
}

@media (min-width: 1200px) {
    /* Only limit text width on very wide screens for readability */
    p {
        max-width: 100%;
    }

    #page-content p {
        max-width: 100%;
    }
}

@media (min-width: 1600px) {
    /* On ultra-wide screens, limit to 85% for optimal reading */
    p {
        max-width: 85%;
    }

    #page-content p {
        max-width: 85%;
    }
}/* Better list styling */
ul, ol {
    margin-bottom: var(--space-lg);
    padding-left: var(--space-xl);
    max-width: 100%;
}

li {
    margin-bottom: var(--space-sm);
    line-height: 1.6;
    max-width: 100%;
}

/* Enhanced blockquote styling */
blockquote {
    border-left: 4px solid var(--primary-color);
    background-color: rgba(210, 32, 48, 0.05);
    padding: var(--space-lg);
    margin: var(--space-xl) 0;
    border-radius: var(--radius-md);
    font-style: italic;
}

blockquote p:last-child {
    margin-bottom: 0;
}

/* Enhanced link styles */
a {
    color: var(--accent-color);
    text-decoration: none;
    transition: all 0.2s ease;
    border-bottom: 1px solid transparent;
}

a:hover {
    color: var(--primary-color);
    border-bottom-color: var(--primary-color);
    text-decoration: none;
}

a:focus {
    outline: 2px solid var(--accent-color);
    outline-offset: 2px;
    border-radius: var(--radius-sm);
}

/* ===== ENHANCED NAVIGATION ===== */
.navbar {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    box-shadow: var(--shadow-medium);
    padding: var(--space-md) 0;
}

.navbar-brand {
    font-weight: 700;
    font-size: var(--font-size-xl);
    color: white !important;
}

.navbar-nav .nav-link {
    color: rgba(255, 255, 255, 0.9) !important;
    font-weight: 500;
    padding: var(--space-sm) var(--space-md) !important;
    border-radius: var(--radius-md);
    transition: all 0.3s ease;
    margin: 0 var(--space-xs);
}

.navbar-nav .nav-link:hover,
.navbar-nav .nav-link.active {
    background-color: rgba(255, 255, 255, 0.15);
    color: white !important;
    transform: translateY(-1px);
}

.dropdown-menu {
    border: none;
    box-shadow: var(--shadow-strong);
    border-radius: var(--radius-lg);
    margin-top: var(--space-sm);
}

.dropdown-item {
    padding: var(--space-sm) var(--space-lg);
    transition: all 0.2s ease;
}

.dropdown-item:hover {
    background-color: var(--background-light);
    color: var(--primary-color);
    transform: translateX(4px);
}

/* ===== IMPROVED CONTENT LAYOUT ===== */
#app-content {
    background-color: var(--background-white);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-light);
    padding: var(--space-2xl);
    margin-top: var(--space-xl);
    margin-bottom: var(--space-2xl);
    min-height: 60vh;
    max-width: none; /* Allow full width usage */
}

/* Improved layout containers for better text width */
#page-content {
    max-width: 100%;
}

.content-area {
    max-width: 100%;
    width: 100%;
    padding: 0 var(--space-lg); /* Add both left and right padding */
}

/* Better responsive spacing for content area */
@media (max-width: 991px) {
    .content-area {
        padding: 0 var(--space-md); /* Reduce padding on smaller screens */
        margin-top: var(--space-lg);
    }
}

@media (min-width: 992px) {
    .content-area {
        padding: 0 var(--space-lg); /* Standard padding for medium screens */
    }
}

@media (min-width: 1200px) {
    .content-area {
        padding: 0 var(--space-xl); /* More padding for larger screens */
    }
}

@media (min-width: 1400px) {
    .content-area {
        padding: 0 var(--space-2xl); /* Even more padding for very large screens */
    }
}

/* Better responsive layout for different screen sizes - maximize screen usage */
@media (min-width: 768px) {
    .container-fluid {
        padding-left: 1rem;
        padding-right: 1rem;
    }

    #app-content {
        padding: var(--space-2xl) 2rem;
    }
}

@media (min-width: 992px) {
    .container-fluid {
        padding-left: 1rem;
        padding-right: 1rem;
    }

    #app-content {
        padding: var(--space-2xl) 1.5rem;
    }
}

@media (min-width: 1200px) {
    .container-fluid {
        padding-left: 0.75rem;
        padding-right: 0.75rem;
    }

    #app-content {
        padding: var(--space-2xl) 1.5rem;
    }
}

@media (min-width: 1400px) {
    .container-fluid {
        padding-left: 0.5rem;
        padding-right: 0.5rem;
    }

    #app-content {
        padding: var(--space-2xl) 1rem;
    }
}

@media (min-width: 1600px) {
    .container-fluid {
        padding-left: 0.5rem;
        padding-right: 0.5rem;
    }

    #app-content {
        padding: var(--space-2xl) 1rem;
    }
}/* Enhanced table of contents */
#toc {
    background-color: var(--background-white);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    position: sticky;
    top: var(--space-xl);
    box-shadow: var(--shadow-medium);
    border-left: 4px solid var(--primary-color);
}

#toc .nav-link {
    color: var(--text-primary) !important;
    font-size: var(--font-size-sm);
    padding: var(--space-sm) var(--space-md) !important;
    border-radius: var(--radius-md);
    transition: all 0.2s ease;
    font-weight: 500;
    background-color: transparent !important;
}

#toc .nav-link:hover {
    background-color: rgba(210, 32, 48, 0.1) !important;
    color: var(--primary-dark) !important;
    text-decoration: none;
}

#toc .nav-link.active {
    background-color: var(--primary-color) !important;
    color: white !important;
    font-weight: 600;
}

/* Override Bootstrap TOC specific styles */
#toc .nav > li > a,
#toc .nav > li > .nav-link {
    color: var(--text-primary) !important;
    background-color: transparent !important;
}

#toc .nav > li > a:hover,
#toc .nav > li > .nav-link:hover {
    background-color: rgba(210, 32, 48, 0.1) !important;
    color: var(--primary-dark) !important;
}

#toc .nav > li > a.active,
#toc .nav > li > .nav-link.active {
    background-color: var(--primary-color) !important;
    color: white !important;
}

/* TOC heading styles */
#toc .nav > li > .nav-link {
    font-weight: 600;
    color: var(--secondary-color);
}

#toc .nav .nav > li > .nav-link {
    font-weight: 400;
    color: var(--text-secondary) !important;
    padding-left: calc(var(--space-md) + var(--space-sm)) !important;
    background-color: transparent !important;
}

#toc .nav .nav > li > .nav-link:hover {
    background-color: rgba(210, 32, 48, 0.05) !important;
    color: var(--text-primary) !important;
}

#toc .nav .nav > li > .nav-link.active {
    background-color: rgba(210, 32, 48, 0.15) !important;
    color: var(--primary-color) !important;
    font-weight: 500;
}

/* Ensure all TOC text is visible regardless of Bootstrap TOC plugin styles */
#toc ul,
#toc .nav {
    list-style: none;
    padding-left: 0;
}

#toc li {
    margin-bottom: var(--space-xs);
}

#toc a {
    display: block;
    color: var(--text-primary) !important;
    text-decoration: none;
    padding: var(--space-sm) var(--space-md);
    border-radius: var(--radius-md);
    transition: all 0.2s ease;
}

#toc a:hover {
    background-color: rgba(210, 32, 48, 0.1) !important;
    color: var(--primary-dark) !important;
    text-decoration: none;
}

#toc a.active {
    background-color: var(--primary-color) !important;
    color: white !important;
    font-weight: 600;
}

/* Hide nested TOC lists so only h2 links are shown */
#toc ul ul {
  display: none !important;
}

/* ===== ENHANCED TABLES ===== */
.table {
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-light);
    margin-bottom: var(--space-2xl);
}

.table th {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    color: white;
    font-weight: 600;
    padding: var(--space-lg);
    border: none;
    font-size: var(--font-size-sm);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.table td {
    padding: var(--space-md) var(--space-lg);
    border-color: var(--border-color);
    vertical-align: middle;
}

.table-striped tbody tr:nth-of-type(odd) {
    background-color: rgba(210, 32, 48, 0.02);
}

.table-hover tbody tr:hover {
    background-color: rgba(210, 32, 48, 0.05);
    transform: translateX(2px);
    transition: all 0.2s ease;
}

/* ===== ENHANCED BUTTONS ===== */
.btn {
    font-weight: 500;
    border-radius: var(--radius-lg);
    padding: var(--space-sm) var(--space-lg);
    transition: all 0.3s ease;
    text-transform: none;
    letter-spacing: 0.25px;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    border: none;
    box-shadow: var(--shadow-light);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-medium);
    background: linear-gradient(135deg, var(--primary-dark) 0%, #901a25 100%);
}

/* ===== LOADING AND ERROR STATES ===== */
.spinner-border {
    color: var(--primary-color);
}

.alert {
    border: none;
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    margin-bottom: var(--space-xl);
}

.alert-info {
    background-color: rgba(52, 152, 219, 0.1);
    color: #2980b9;
    border-left: 4px solid var(--accent-color);
}

/* ===== ACCESSIBILITY IMPROVEMENTS ===== */
/* Skip navigation link for screen readers */
.skip-nav {
    position: absolute;
    top: -40px;
    left: 6px;
    background: var(--primary-color);
    color: white;
    padding: var(--space-sm) var(--space-md);
    text-decoration: none;
    border-radius: var(--radius-md);
    z-index: 1000;
    transition: top 0.3s;
}

.skip-nav:focus {
    top: 6px;
    color: white;
    text-decoration: none;
}

/* Focus indicators */
button:focus,
.btn:focus,
input:focus,
select:focus,
textarea:focus {
    outline: 2px solid var(--accent-color);
    outline-offset: 2px;
    box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.2);
}

/* High contrast mode support */
@media (prefers-contrast: high) {
    :root {
        --text-primary: #000000;
        --text-secondary: #000000;
        --border-color: #000000;
    }

    .table th {
        background: #000000;
        color: #ffffff;
    }
}

/* Reduced motion support */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* ===== RESPONSIVE IMPROVEMENTS ===== */
@media (max-width: 768px) {
    :root {
        --font-size-4xl: 1.75rem;
        --font-size-3xl: 1.5rem;
        --space-2xl: 2rem;
    }

    .container-fluid {
        padding-left: 1rem;
        padding-right: 1rem;
    }

    #app-content {
        padding: var(--space-lg);
        margin-top: var(--space-lg);
    }

    .table-responsive {
        border-radius: var(--radius-lg);
    }

    #toc {
        position: static;
        margin-bottom: var(--space-lg);
    }

    p {
        max-width: none;
    }
}

/* ===== BACK TO TOP BUTTON ===== */
#btn-back-to-top {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    color: white;
    border: none;
    border-radius: 50%;
    width: 56px;
    height: 56px;
    display: none; /* Initially hidden */
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-xl);
    box-shadow: var(--shadow-medium);
    transition: transform 0.3s ease, box-shadow 0.3s ease, background 0.3s ease;
    z-index: 1000;
    cursor: pointer;
    transform: translateY(0); /* Ensure starting position is set */
}

#btn-back-to-top.show {
    display: flex; /* Show when needed */
}

#btn-back-to-top:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-strong);
    background: linear-gradient(135deg, var(--primary-dark) 0%, #901a25 100%);
}

#btn-back-to-top:not(:hover) {
    transform: translateY(0); /* Explicitly reset position when not hovering */
}

#btn-back-to-top:focus {
    outline: 2px solid var(--accent-color);
    outline-offset: 2px;
}

#btn-back-to-top i {
    font-weight: bold;
    line-height: 1;
}

/* ===== PRINT STYLES ===== */
@media print {
    .navbar,
    #btn-back-to-top,
    #toc {
        display: none !important;
    }

    #app-content {
        box-shadow: none;
        padding: 0;
        margin: 0;
    }

    a {
        color: var(--text-primary) !important;
        text-decoration: none !important;
    }

    .table {
        box-shadow: none;
    }
}

/* ===== DARK MODE SUPPORT ===== */
@media (prefers-color-scheme: dark) {
    :root {
        --text-primary: #e2e8f0;
        --text-secondary: #94a3b8;
        --text-muted: #64748b;
        --background-light: #1e293b;
        --background-white: #334155;
        --border-color: #475569;
    }

    body {
        background-color: var(--background-light);
    }

    #app-content {
        background-color: var(--background-white);
    }

    .table-striped tbody tr:nth-of-type(odd) {
        background-color: rgba(255, 255, 255, 0.02);
    }
}