/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* Vibrant Color Palette */
    --vibrant-blue: #4361EE;
    --vibrant-purple: #7209B7;
    --vibrant-pink: #F72585;
    --vibrant-orange: #FB5607;
    --vibrant-yellow: #FFBE0B;
    --vibrant-green: #4CC9F0;
    --vibrant-teal: #4895EF;
    --vibrant-red: #EF233C;
    
    /* Neutral Colors */
    --neutral-white: #FFFFFF;
    --neutral-light: #F8F9FA;
    --neutral-gray: #6C757D;
    --neutral-dark: #2D3748;
    
    /* Gradients */
    --gradient-primary: linear-gradient(135deg, var(--vibrant-blue), var(--vibrant-purple));
    --gradient-secondary: linear-gradient(135deg, var(--vibrant-pink), var(--vibrant-orange));
    --gradient-accent: linear-gradient(135deg, var(--vibrant-yellow), var(--vibrant-green));
    --gradient-success: linear-gradient(135deg, var(--vibrant-green), var(--vibrant-teal));
    
    /* Shadows */
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.15);
    --shadow-xl: 0 20px 40px rgba(0, 0, 0, 0.2);
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    color: var(--neutral-dark);
    line-height: 1.6;
    position: relative;
    overflow-x: hidden;
}

/* Abstract Colorful Background */
.abstract-bg {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    opacity: 0.12;
    background: 
        radial-gradient(circle at 20% 20%, var(--vibrant-blue) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, var(--vibrant-pink) 0%, transparent 50%),
        radial-gradient(circle at 40% 80%, var(--vibrant-yellow) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, var(--vibrant-green) 0%, transparent 50%);
    filter: blur(60px);
    animation: float 20s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0px) rotate(0deg); }
    33% { transform: translateY(-20px) rotate(1deg); }
    66% { transform: translateY(20px) rotate(-1deg); }
}

/* Header Styles */
.header {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    padding: 1rem 2rem;
    box-shadow: var(--shadow-lg);
    position: sticky;
    top: 0;
    z-index: 1000;
    border-bottom: 3px solid;
    border-image: var(--gradient-primary) 1;
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
    gap: 2rem;
}

.logo {
    display: flex;
    align-items: center;
    gap: 1rem;
    flex-shrink: 0;
}

.logo-image img {
    width: 70px;
    height: 70px;
    border-radius: 12px;
    box-shadow: var(--shadow-lg);
}

.logo-text h1 {
    font-size: 1.6rem;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 0.2rem;
    font-weight: 700;
}

.logo-text p {
    font-size: 0.9rem;
    color: var(--neutral-gray);
    font-weight: 500;
}

.user-info {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    flex-wrap: wrap;
    justify-content: flex-end;
}

.user-welcome {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--neutral-dark);
    font-weight: 500;
    font-size: 0.95rem;
}

.user-welcome i {
    color: var(--vibrant-blue);
    font-size: 1.2rem;
}

.logout-btn {
    padding: 0.6rem 1.2rem;
    font-size: 0.9rem;
    background: var(--gradient-secondary);
    border: none;
    color: white;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.logout-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.menu-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--vibrant-blue);
    cursor: pointer;
    padding: 0.5rem;
}

/* Container Layout */
.container {
    display: flex;
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
    gap: 2rem;
    min-height: calc(100vh - 80px);
    align-items: flex-start;
}

/* Sidebar Styles */
.sidebar {
    width: 280px;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    border-radius: 20px;
    box-shadow: var(--shadow-xl);
    height: fit-content;
    position: sticky;
    top: 120px;
    border: 1px solid rgba(255, 255, 255, 0.2);
    flex-shrink: 0;
    transition: transform 0.3s ease;
    z-index: 900;
}

.sidebar-header {
    padding: 1.5rem 1.5rem 1rem;
    border-bottom: 2px solid var(--neutral-light);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.sidebar-header h3 {
    color: var(--neutral-dark);
    font-size: 1.1rem;
    font-weight: 600;
}

.sidebar-close {
    display: none;
    background: none;
    border: none;
    font-size: 1.2rem;
    color: var(--neutral-gray);
    cursor: pointer;
    padding: 0.25rem;
}

.nav-items {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    padding: 1rem;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem 1.25rem;
    background: none;
    border: none;
    border-radius: 12px;
    cursor: pointer;
    transition: all 0.3s ease;
    color: var(--neutral-gray);
    font-size: 0.95rem;
    text-align: left;
    font-weight: 500;
    width: 100%;
}

.nav-item:hover {
    background: rgba(67, 97, 238, 0.1);
    transform: translateX(5px);
    color: var(--vibrant-blue);
}

.nav-item.active {
    background: var(--gradient-primary);
    color: var(--neutral-white);
    box-shadow: var(--shadow-md);
}

.nav-item i {
    width: 20px;
    text-align: center;
    font-size: 1.1rem;
    flex-shrink: 0;
}

.sidebar-footer {
    padding: 1rem 1.5rem;
    border-top: 2px solid var(--neutral-light);
}

.research-badge {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--vibrant-blue);
    font-size: 0.85rem;
    font-weight: 600;
    justify-content: center;
}

.research-badge i {
    font-size: 0.9rem;
}

/* Sidebar Overlay for Mobile */
.sidebar-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    z-index: 800;
}

/* Main Content Styles */
.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    min-width: 0;
}

/* Hero Card */
.hero-card {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    padding: 2.5rem;
    border-radius: 20px;
    text-align: center;
    box-shadow: var(--shadow-xl);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.hero-card h1 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-weight: 700;
    line-height: 1.2;
}

.hero-card p {
    font-size: 1.2rem;
    color: var(--neutral-gray);
    margin-bottom: 2rem;
    font-weight: 500;
    line-height: 1.5;
}

.button-group {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

/* Content Card */
.content-card {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    padding: 2rem;
    border-radius: 16px;
    box-shadow: var(--shadow-lg);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.content-card h2 {
    color: var(--neutral-dark);
    margin-bottom: 1.5rem;
    font-size: 1.8rem;
    font-weight: 700;
    line-height: 1.3;
}

.content-card h3 {
    color: var(--neutral-dark);
    margin-bottom: 1rem;
    font-size: 1.4rem;
    font-weight: 600;
    line-height: 1.3;
}

.content-card h4 {
    color: var(--neutral-dark);
    margin-bottom: 0.75rem;
    font-size: 1.2rem;
    font-weight: 600;
    line-height: 1.3;
}

.content-card p {
    color: var(--neutral-gray);
    line-height: 1.6;
    margin-bottom: 1rem;
}

/* Document Section Styles */
.document-section {
    background: rgba(255, 255, 255, 0.9);
    border-radius: 12px;
    padding: 1.5rem;
    margin: 1.5rem 0;
    border: 2px solid rgba(67, 97, 238, 0.1);
    box-shadow: var(--shadow-md);
}

.document-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1rem;
}

.document-icon {
    width: 50px;
    height: 50px;
    background: var(--gradient-primary);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.2rem;
}

.document-info h4 {
    margin: 0;
    color: var(--neutral-dark);
    font-size: 1.1rem;
}

.document-info p {
    margin: 0.25rem 0 0 0;
    color: var(--neutral-gray);
    font-size: 0.9rem;
}

.document-controls {
    display: flex;
    gap: 1rem;
    align-items: center;
    margin-top: 1rem;
    flex-wrap: wrap;
}

.document-btn {
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.9rem;
}

.view-btn {
    background: var(--gradient-primary);
    color: white;
}

.view-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.download-doc-btn {
    background: rgba(255, 255, 255, 0.9);
    color: var(--vibrant-blue);
    border: 2px solid var(--vibrant-blue);
}

.download-doc-btn:hover {
    background: var(--vibrant-blue);
    color: white;
    transform: translateY(-2px);
}

.audio-btn {
    background: rgba(255, 255, 255, 0.9);
    color: var(--vibrant-purple);
    border: 2px solid var(--vibrant-purple);
}

.audio-btn:hover {
    background: var(--vibrant-purple);
    color: white;
    transform: translateY(-2px);
}

.document-preview {
    background: var(--neutral-light);
    border-radius: 8px;
    padding: 1rem;
    margin-top: 1rem;
    border-left: 4px solid var(--vibrant-blue);
}

.document-preview h5 {
    color: var(--neutral-dark);
    margin-bottom: 0.5rem;
    font-size: 1rem;
}

.document-preview p {
    color: var(--neutral-gray);
    font-size: 0.9rem;
    margin: 0;
    line-height: 1.5;
}

/* Document Modal Styles */
.document-modal {
    max-width: 800px;
    max-height: 90vh;
    display: flex;
    flex-direction: column;
}

.document-modal .modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem 2rem;
    border-bottom: 2px solid var(--neutral-light);
    margin-bottom: 0;
}

.document-modal .modal-header h2 {
    margin: 0;
    color: var(--neutral-dark);
}

.close-btn {
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--neutral-gray);
    cursor: pointer;
    padding: 0.5rem;
    transition: color 0.3s ease;
}

.close-btn:hover {
    color: var(--vibrant-red);
}

.document-content {
    flex: 1;
    overflow-y: auto;
    padding: 2rem;
    line-height: 1.8;
}

.document-content h1, 
.document-content h2, 
.document-content h3 {
    color: var(--neutral-dark);
    margin-bottom: 1rem;
}

.document-content h1 {
    font-size: 2rem;
    border-bottom: 3px solid var(--vibrant-blue);
    padding-bottom: 0.5rem;
}

.document-content h2 {
    font-size: 1.5rem;
    color: var(--vibrant-blue);
}

.document-content h3 {
    font-size: 1.25rem;
    color: var(--vibrant-purple);
}

.document-content p {
    margin-bottom: 1rem;
    color: var(--neutral-dark);
}

.document-content ul, 
.document-content ol {
    margin-bottom: 1rem;
    padding-left: 2rem;
}

.document-content li {
    margin-bottom: 0.5rem;
    color: var(--neutral-dark);
}

.document-content blockquote {
    border-left: 4px solid var(--vibrant-blue);
    padding-left: 1rem;
    margin: 1.5rem 0;
    font-style: italic;
    color: var(--neutral-gray);
}

.document-modal .modal-footer {
    padding: 1.5rem 2rem;
    border-top: 2px solid var(--neutral-light);
    display: flex;
    gap: 1rem;
    justify-content: flex-end;
}

/* PDF Modal Styles */
.pdf-modal {
    max-width: 90%;
    max-height: 95vh;
    display: flex;
    flex-direction: column;
    width: 100%;
}

.pdf-modal .modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem 2rem;
    border-bottom: 2px solid var(--neutral-light);
    margin-bottom: 0;
}

.pdf-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    padding: 1rem;
}

.pdf-controls {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem;
    background: var(--neutral-light);
    border-radius: 8px;
    margin-bottom: 1rem;
    flex-wrap: wrap;
    gap: 1rem;
}

.page-info {
    font-weight: 600;
    color: var(--neutral-dark);
}

.pdf-container {
    flex: 1;
    display: flex;
    justify-content: center;
    align-items: flex-start;
    overflow: auto;
    background: var(--neutral-light);
    border-radius: 8px;
    padding: 1rem;
}

#pdfCanvas {
    max-width: 100%;
    box-shadow: var(--shadow-md);
    border-radius: 4px;
}

/* Audio Modal Styles */
.audio-modal {
    max-width: 600px;
    max-height: 80vh;
    display: flex;
    flex-direction: column;
}

.audio-modal .modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem 2rem;
    border-bottom: 2px solid var(--neutral-light);
    margin-bottom: 0;
}

.audio-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    padding: 1.5rem;
}

.audio-player {
    background: var(--neutral-light);
    border-radius: 12px;
    padding: 1.5rem;
    margin-bottom: 1.5rem;
    box-shadow: var(--shadow-md);
}

.audio-info {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

.audio-title {
    font-weight: 600;
    color: var(--neutral-dark);
    font-size: 1.1rem;
}

.audio-duration {
    color: var(--neutral-gray);
    font-size: 0.9rem;
}

.audio-controls {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 0.5rem;
}

.audio-btn {
    width: 40px;
    height: 40px;
    border-radius: 10%;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--vibrant-blue);
    color: white;
    border: none;
    cursor: pointer;
    transition: all 0.3s ease;
}

.audio-btn:hover {
    transform: scale(1.1);
    box-shadow: var(--shadow-md);
}

.progress-container {
    flex: 1;
    height: 6px;
    background: #ddd;
    border-radius: 3px;
    cursor: pointer;
    position: relative;
}

.progress-bar {
    height: 100%;
    width: 100%;
    position: relative;
}

.progress {
    height: 100%;
    background: var(--vibrant-blue);
    border-radius: 3px;
    width: 0%;
    transition: width 0.1s ease;
}

.audio-time {
    display: flex;
    justify-content: space-between;
    font-size: 0.8rem;
    color: var(--neutral-gray);
}

.audio-list {
    flex: 1;
    overflow-y: auto;
}

.audio-list h3 {
    margin-bottom: 1rem;
    color: var(--neutral-dark);
}

.audio-items {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.audio-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem;
    background: var(--neutral-light);
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.audio-item:hover {
    background: rgba(67, 97, 238, 0.1);
    transform: translateX(5px);
}

.audio-item.active {
    background: var(--gradient-primary);
    color: white;
}

.audio-item-info {
    display: flex;
    flex-direction: column;
}

.audio-item-title {
    font-weight: 600;
}

.audio-item-duration {
    font-size: 0.8rem;
    color: inherit;
    opacity: 0.7;
}

/* Feature Grid */
.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    width: 100%;
}

.feature-card {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    padding: 2rem;
    border-radius: 16px;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: var(--shadow-lg);
    border: 1px solid rgba(255, 255, 255, 0.2);
    display: flex;
    flex-direction: column;
    align-items: center;
}

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

.feature-icon {
    width: 70px;
    height: 70px;
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.25rem;
    font-size: 1.8rem;
    color: var(--neutral-white);
    box-shadow: var(--shadow-md);
}

.bg-blue { background: var(--gradient-primary); }
.bg-pink { background: var(--gradient-secondary); }
.bg-yellow { background: var(--gradient-accent); }
.bg-green { background: var(--gradient-success); }
.bg-purple { background: linear-gradient(135deg, var(--vibrant-purple), #5A189A); }
.bg-teal { background: linear-gradient(135deg, var(--vibrant-teal), #4895EF); }

.feature-card h3 {
    margin-bottom: 0.75rem;
    color: var(--neutral-dark);
    font-weight: 600;
    font-size: 1.1rem;
}

.feature-card p {
    color: var(--neutral-gray);
    font-size: 0.9rem;
    font-weight: 500;
    margin: 0;
}

/* Stats Grid */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 1.5rem;
    margin-top: 1.5rem;
}

.stat-item {
    text-align: center;
    padding: 1.5rem;
    background: rgba(255, 255, 255, 0.9);
    border-radius: 12px;
    border: 1px solid rgba(255, 255, 255, 0.2);
    box-shadow: var(--shadow-md);
}

.stat-number {
    font-size: 2rem;
    font-weight: bold;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 0.5rem;
    line-height: 1;
}

.stat-label {
    color: var(--neutral-gray);
    font-size: 0.9rem;
    font-weight: 500;
}

/* Form Styles */
.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    color: var(--neutral-dark);
    font-weight: 600;
    font-size: 0.95rem;
}

.form-control {
    width: 100%;
    padding: 1rem;
    border: 2px solid #E9ECEF;
    border-radius: 10px;
    font-size: 1rem;
    transition: all 0.3s ease;
    background: var(--neutral-white);
    font-family: inherit;
}

.form-control:focus {
    outline: none;
    border-color: var(--vibrant-blue);
    box-shadow: 0 0 0 3px rgba(67, 97, 238, 0.1);
}

/* Button Styles */
.btn {
    padding: 1rem 2rem;
    border: none;
    border-radius: 10px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    font-family: inherit;
    text-align: center;
    min-width: 120px;
}

.btn-primary {
    background: var(--gradient-primary);
    color: var(--neutral-white);
    box-shadow: var(--shadow-md);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.9);
    color: var(--vibrant-blue);
    border: 2px solid var(--vibrant-blue);
    box-shadow: var(--shadow-sm);
}

.btn-secondary:hover {
    background: var(--vibrant-blue);
    color: var(--neutral-white);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* Rating Buttons */
.rating-buttons {
    display: flex;
    gap: 0.5rem;
    justify-content: center;
    margin: 1.5rem 0;
    flex-wrap: wrap;
}

.rating-btn {
    width: 50px;
    height: 50px;
    border: 2px solid #E9ECEF;
    background: var(--neutral-white);
    border-radius: 10px;
    font-size: 1.1rem;
    font-weight: bold;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
}

.rating-btn:hover {
    border-color: var(--vibrant-blue);
    transform: translateY(-2px);
}

.rating-btn.active {
    background: var(--gradient-primary);
    color: var(--neutral-white);
    border-color: var(--vibrant-blue);
}

/* Styled List */
.styled-list {
    list-style: none;
    padding: 0;
}

.styled-list li {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    padding: 1rem 0;
    border-bottom: 1px solid #F0F0F0;
}

.styled-list li:last-child {
    border-bottom: none;
}

.list-number {
    background: var(--gradient-primary);
    color: var(--neutral-white);
    width: 30px;
    height: 30px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    flex-shrink: 0;
    font-size: 0.85rem;
}

/* Research Notice */
.research-notice {
    background: rgba(67, 97, 238, 0.1);
    border: 2px solid rgba(67, 97, 238, 0.2);
    border-radius: 12px;
    padding: 1.25rem;
    margin: 1.5rem 0;
    display: flex;
    align-items: flex-start;
    gap: 1rem;
}

.research-notice i {
    color: var(--vibrant-blue);
    font-size: 1.1rem;
    margin-top: 0.1rem;
    flex-shrink: 0;
}

.research-notice strong {
    color: var(--neutral-dark);
    display: block;
    margin-bottom: 0.25rem;
    font-size: 0.95rem;
}

.research-notice p {
    color: var(--neutral-gray);
    margin: 0;
    font-size: 0.9rem;
    line-height: 1.5;
}

/* Modal Styles */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    z-index: 10000;
    justify-content: center;
    align-items: center;
    backdrop-filter: blur(5px);
    padding: 1rem;
}

.modal-content {
    background: var(--neutral-white);
    padding: 2.5rem;
    border-radius: 20px;
    max-width: 450px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: var(--shadow-xl);
    border: 2px solid;
    border-image: var(--gradient-primary) 1;
}

.modal-header {
    text-align: center;
    margin-bottom: 2rem;
}

/* Update modal logo size */
.modal-logo {
    width: 80px; /* Adjust this value */
    height: 80px; /* Adjust this value */
    background: var(--gradient-primary);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--neutral-white);
    font-size: 2rem; /* Adjust icon font size */
    margin: 0 auto 1rem;
    box-shadow: var(--shadow-md);
}

.modal-logo img {
    width: 200%;
    height: 200%;
    object-fit: contain; /* This ensures the image fits properly */
    border-radius: 20px;
}


.modal-header h2 {
    margin-bottom: 0.5rem;
    color: var(--neutral-dark);
    font-size: 1.5rem;
    font-weight: 700;
}

.modal-header p {
    color: var(--vibrant-blue);
    font-weight: 600;
    font-size: 1rem;
}

.modal-body {
    margin-bottom: 1rem;
}

.auth-switch {
    text-align: center;
    margin-top: 1.5rem;
    padding-top: 1.5rem;
    border-top: 2px solid var(--neutral-light);
}

.auth-switch p {
    color: var(--neutral-gray);
    margin-bottom: 1rem;
    font-weight: 500;
    font-size: 0.9rem;
}

/* Consent Checkbox */
.consent-box {
    margin: 1.5rem 0;
    padding: 1.25rem;
    background: var(--neutral-light);
    border-radius: 12px;
    border: 2px solid #E9ECEF;
}

.checkbox-label {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    cursor: pointer;
    font-size: 0.9rem;
    color: var(--neutral-dark);
    line-height: 1.5;
}

.checkbox-label input[type="checkbox"] {
    display: none;
}

.checkmark {
    width: 20px;
    height: 20px;
    border: 2px solid #DDD;
    border-radius: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    transition: all 0.3s ease;
    margin-top: 0.1rem;
}

.checkmark:after {
    content: "✓";
    color: var(--neutral-white);
    font-size: 12px;
    display: none;
}

.checkbox-label input[type="checkbox"]:checked + .checkmark {
    background: var(--vibrant-blue);
    border-color: var(--vibrant-blue);
}

.checkbox-label input[type="checkbox"]:checked + .checkmark:after {
    display: block;
}

.consent-text {
    font-weight: 500;
}

/* Button disabled state */
.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none !important;
}

.btn:disabled:hover {
    transform: none !important;
    box-shadow: none !important;
}

/* Responsive Design */
@media (max-width: 1024px) {
    .container {
        flex-direction: column;
        padding: 1.5rem;
        gap: 1.5rem;
    }
    
    .sidebar {
        width: 100%;
        position: fixed;
        top: 0;
        left: 0;
        height: 100vh;
        z-index: 1000;
        transform: translateX(-100%);
        border-radius: 0;
        transition: transform 0.3s ease;
    }
    
    .sidebar.active {
        transform: translateX(0);
    }
    
    .sidebar-close {
        display: block;
    }
    
    .sidebar-overlay.active {
        display: block;
    }
    
    .menu-toggle {
        display: block;
    }
    
    .header-content {
        padding: 0 1rem;
    }
    
    .hero-card {
        padding: 2rem 1.5rem;
    }
    
    .hero-card h1 {
        font-size: 2rem;
    }
    
    .feature-grid {
        grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
        gap: 1rem;
    }
    
    .document-controls {
        flex-direction: column;
        align-items: stretch;
    }
    
    .document-btn {
        width: 100%;
        justify-content: center;
    }
    
    .document-modal {
        margin: 1rem;
    }
    
    .pdf-modal {
        max-width: 95%;
    }
    
    .pdf-controls {
        flex-direction: column;
        gap: 0.5rem;
    }
}

@media (max-width: 768px) {
    .header {
        padding: 1rem;
    }
    
    .header-content {
        flex-wrap: wrap;
        gap: 1rem;
    }
    
    .logo-text h1 {
        font-size: 1.3rem;
    }
    
    .user-info {
        order: 3;
        width: 100%;
        justify-content: center;
    }
    
    .modal-content {
        padding: 2rem 1.5rem;
    }
    
    .rating-buttons {
        gap: 0.5rem;
    }
    
    .rating-btn {
        width: 45px;
        height: 45px;
        font-size: 1rem;
    }
    
    .feature-grid {
        grid-template-columns: 1fr;
    }
    
    .button-group {
        flex-direction: column;
        align-items: stretch;
    }
    
    .btn {
        width: 100%;
        justify-content: center;
    }
    
    .document-section {
        padding: 1rem;
    }
    
    .document-header {
        flex-direction: column;
        text-align: center;
        gap: 0.5rem;
    }
    
    .document-modal .modal-footer {
        flex-direction: column;
    }
    
    .pdf-controls {
        flex-direction: column;
        gap: 0.5rem;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 1rem;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
    
    .hero-card h1 {
        font-size: 1.6rem;
    }
    
    .content-card {
        padding: 1.5rem;
    }
    
    .btn {
        padding: 0.875rem 1.5rem;
        font-size: 0.9rem;
    }
    
    .modal-header h2 {
        font-size: 1.3rem;
    }
    
    .modal-content {
        padding: 1.5rem;
    }
    
    .feature-card {
        padding: 1.5rem;
    }
    
    .nav-item {
        padding: 0.875rem 1rem;
        font-size: 0.9rem;
    }
    
    .document-btn {
        padding: 0.875rem 1rem;
        font-size: 0.85rem;
    }
    
    .document-content {
        padding: 1rem;
    }
    
    .audio-controls {
        flex-direction: column;
        gap: 0.5rem;
    }
}
.audio-btn img.audio-icon {
    width: 24px;
    height: 24px;
    object-fit: contain;
}


.audio-modal-footer {
    padding: 1.5rem 0 0 0;
    border-top: 2px solid var(--neutral-light);
    margin-top: 1.5rem;
    display: flex;
    justify-content: center;
}

.audio-modal-footer .btn {
    padding: 0.75rem 1.5rem;
    font-size: 0.9rem;
}
/* Profile Page Styles */
.profile-info {
    display: grid;
    gap: 1rem;
}

.info-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem;
    background: var(--neutral-light);
    border-radius: 8px;
}

.info-item label {
    font-weight: 600;
    color: var(--neutral-dark);
}

.info-item span {
    color: var(--neutral-gray);
}

.research-status {
    display: grid;
    gap: 1rem;
}

.status-item {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    padding: 1.5rem;
    background: var(--neutral-light);
    border-radius: 12px;
    border-left: 4px solid var(--vibrant-blue);
}

.status-item.active {
    border-left-color: var(--vibrant-green);
}

.status-item i {
    color: var(--vibrant-blue);
    font-size: 1.5rem;
    margin-top: 0.25rem;
}

.status-item.active i {
    color: var(--vibrant-green);
}

.status-item h4 {
    margin: 0 0 0.5rem 0;
    color: var(--neutral-dark);
}

.status-item p {
    margin: 0;
    color: var(--neutral-gray);
}

.progress-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 1.5rem;
}

.progress-item {
    text-align: center;
    padding: 1.5rem;
    background: var(--neutral-light);
    border-radius: 12px;
}

.progress-number {
    font-size: 2rem;
    font-weight: bold;
    color: var(--vibrant-blue);
    margin-bottom: 0.5rem;
}

.progress-label {
    color: var(--neutral-gray);
    font-size: 0.9rem;
}

.account-actions {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

/* Research Team Styles */
.team-grid {
    display: grid;
    gap: 2rem;
}

.student-grid {
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

.team-member {
    display: flex;
    gap: 1.5rem;
    padding: 1.5rem;
    background: var(--neutral-light);
    border-radius: 12px;
    align-items: flex-start;
}

.student-member {
    flex-direction: column;
    text-align: center;
    align-items: center;
}

.member-image {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    overflow: hidden;
    flex-shrink: 0;
}

.student-member .member-image {
    width: 100px;
    height: 100px;
}

.member-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.member-info {
    flex: 1;
}

.student-member .member-info {
    text-align: center;
}

.member-info h3 {
    margin: 0 0 0.5rem 0;
    color: var(--neutral-dark);
}

.member-role {
    color: var(--vibrant-blue);
    font-weight: 600;
    margin: 0 0 0.5rem 0;
}

.member-qualifications {
    color: var(--vibrant-purple);
    font-style: italic;
    margin: 0 0 1rem 0;
    font-size: 0.9rem;
}

.member-year {
    color: var(--vibrant-green);
    font-weight: 600;
    margin: 0 0 1rem 0;
}

.member-description {
    color: var(--neutral-gray);
    line-height: 1.5;
    margin: 0;
}

.research-objectives {
    display: grid;
    gap: 1.5rem;
}

.objective-item {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    padding: 1.5rem;
    background: var(--neutral-light);
    border-radius: 12px;
}

.objective-item i {
    color: var(--vibrant-blue);
    font-size: 1.5rem;
    margin-top: 0.25rem;
    flex-shrink: 0;
}

.objective-item h3 {
    margin: 0 0 0.5rem 0;
    color: var(--neutral-dark);
}

.objective-item p {
    margin: 0;
    color: var(--neutral-gray);
}

/* Developer Profile Styles */
.developer-profile {
    display: flex;
    gap: 2rem;
    align-items: center;
}

.developer-image {
    width: 200px;
    height: 250px;
    border-radius: 12px; /* Changed from 50% to 12px for rectangle with rounded corners */
    overflow: hidden;
    flex-shrink: 0;
    box-shadow: var(--shadow-lg); /* Added shadow for better visual appeal */
    border: 3px solid var(--vibrant-blue); /* Optional: Add a border */
}

.developer-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.developer-info h2 {
    margin: 0 0 0.5rem 0;
    color: var(--neutral-dark);
}

.developer-role {
    color: var(--vibrant-blue);
    font-weight: 600;
    margin: 0 0 1.5rem 0;
    font-size: 1.1rem;
}

.developer-details {
    display: grid;
    gap: 1rem;
}

.detail-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.detail-item i {
    color: var(--vibrant-blue);
    width: 20px;
}

.platform-info {
    line-height: 1.6;
}

.tech-stack {
    margin: 2rem 0;
}

.tech-stack h4 {
    margin-bottom: 1rem;
    color: var(--neutral-dark);
}

.tech-items {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.tech-item {
    background: var(--vibrant-blue);
    color: white;
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 500;
}

.features-list {
    margin: 2rem 0;
}

.features-list h4 {
    margin-bottom: 1rem;
    color: var(--neutral-dark);
}

.features-list ul {
    list-style: none;
    padding: 0;
}

.features-list li {
    padding: 0.5rem 0;
    color: var(--neutral-gray);
    position: relative;
    padding-left: 1.5rem;
}

.features-list li:before {
    content: "✓";
    color: var(--vibrant-green);
    position: absolute;
    left: 0;
    font-weight: bold;
}

.research-integration {
    display: grid;
    gap: 1.5rem;
}

.integration-item {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    padding: 1.5rem;
    background: var(--neutral-light);
    border-radius: 12px;
}

.integration-item i {
    color: var(--vibrant-blue);
    font-size: 1.5rem;
    margin-top: 0.25rem;
    flex-shrink: 0;
}

.integration-item h4 {
    margin: 0 0 0.5rem 0;
    color: var(--neutral-dark);
}

.integration-item p {
    margin: 0;
    color: var(--neutral-gray);
}

.contact-info p {
    margin-bottom: 1.5rem;
    color: var(--neutral-gray);
}

.contact-details {
    display: grid;
    gap: 1rem;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.contact-item i {
    color: var(--vibrant-blue);
    width: 20px;
}

/* Audio Modal Footer */
.audio-modal-footer {
    padding: 1.5rem 0 0 0;
    border-top: 2px solid var(--neutral-light);
    margin-top: 1.5rem;
    display: flex;
    justify-content: center;
}

.audio-modal-footer .btn {
    padding: 0.75rem 1.5rem;
    font-size: 0.9rem;
}

/* Responsive Design for New Sections */
@media (max-width: 768px) {
    .developer-profile {
        flex-direction: column;
        text-align: center;
    }

    .team-member {
        flex-direction: column;
        text-align: center;
        align-items: center;
    }

    .student-grid {
        grid-template-columns: 1fr;
    }

    .progress-stats {
        grid-template-columns: 1fr;
    }

    .account-actions {
        flex-direction: column;
    }

    .info-item {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.5rem;
    }

    .objective-item,
    .integration-item {
        flex-direction: column;
        text-align: center;
        align-items: center;
    }
}
/* Update hero card text colors */
.hero-card h1 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    color: var(--neutral-dark); /* Changed from gradient to solid dark color */
    font-weight: 700;
    line-height: 1.2;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.1); /* Added shadow for better contrast */
}

.hero-card p {
    font-size: 1.2rem;
    color: var(--neutral-dark); /* Changed from gray to dark for better visibility */
    margin-bottom: 2rem;
    font-weight: 500;
    line-height: 1.5;
    text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.1);
}

/* Update content card headings */
.content-card h2 {
    color: var(--neutral-dark);
    margin-bottom: 1.5rem;
    font-size: 1.8rem;
    font-weight: 700;
    line-height: 1.3;
    text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.1);
}

.content-card h3 {
    color: var(--neutral-dark);
    margin-bottom: 1rem;
    font-size: 1.4rem;
    font-weight: 600;
    line-height: 1.3;
    text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.1);
}

.content-card h4 {
    color: var(--neutral-dark);
    margin-bottom: 0.75rem;
    font-size: 1.2rem;
    font-weight: 600;
    line-height: 1.3;
    text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.1);
}

/* Update background colors for better contrast */
.hero-card {
    background: rgba(255, 255, 255, 0.98); /* Increased opacity */
    backdrop-filter: blur(20px);
    padding: 2.5rem;
    border-radius: 20px;
    text-align: center;
    box-shadow: var(--shadow-xl);
    border: 2px solid rgba(255, 255, 255, 0.3); /* Added border */
}

.content-card {
    background: rgba(255, 255, 255, 0.98); /* Increased opacity */
    backdrop-filter: blur(20px);
    padding: 2rem;
    border-radius: 16px;
    box-shadow: var(--shadow-lg);
    border: 2px solid rgba(255, 255, 255, 0.3); /* Added border */
}

/* Update sidebar text visibility */
.sidebar {
    width: 280px;
    background: rgba(255, 255, 255, 0.98); /* Increased opacity */
    backdrop-filter: blur(20px);
    border-radius: 20px;
    box-shadow: var(--shadow-xl);
    height: fit-content;
    position: sticky;
    top: 120px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    flex-shrink: 0;
}

.sidebar-header h3 {
    color: var(--neutral-dark);
    font-size: 1.1rem;
    font-weight: 600;
    text-align: center;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem 1.25rem;
    background: none;
    border: none;
    border-radius: 12px;
    cursor: pointer;
    transition: all 0.3s ease;
    color: var(--neutral-dark); /* Changed from gray to dark */
    font-size: 0.95rem;
    text-align: left;
    font-weight: 500;
    width: 100%;
}

/* Update header for better visibility */
.header {
    background: rgba(255, 255, 255, 0.98); /* Increased opacity */
    backdrop-filter: blur(20px);
    padding: 1rem 2rem;
    box-shadow: var(--shadow-lg);
    position: sticky;
    top: 0;
    z-index: 1000;
    border-bottom: 3px solid;
    border-image: var(--gradient-primary) 1;
}

.logo-text h1 {
    font-size: 1.6rem;
    color: var(--neutral-dark); /* Changed from gradient to solid color */
    margin-bottom: 0.2rem;
    font-weight: 700;
}

.logo-text p {
    font-size: 0.9rem;
    color: var(--neutral-dark); /* Changed from gray to dark */
    font-weight: 500;
}

/* Update research notice for better visibility */
.research-notice {
    background: rgba(67, 97, 238, 0.15); /* Increased opacity */
    border: 2px solid rgba(67, 97, 238, 0.3);
    border-radius: 12px;
    padding: 1.25rem;
    margin: 1.5rem 0;
    display: flex;
    align-items: flex-start;
    gap: 1rem;
}

.research-notice strong {
    color: var(--neutral-dark);
    display: block;
    margin-bottom: 0.25rem;
    font-size: 0.95rem;
}

.research-notice p {
    color: var(--neutral-dark);
    margin: 0;
    font-size: 0.9rem;
    line-height: 1.5;
}

/* Update feature cards */
.feature-card {
    background: rgba(255, 255, 255, 0.98); /* Increased opacity */
    backdrop-filter: blur(20px);
    padding: 2rem;
    border-radius: 16px;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: var(--shadow-lg);
    border: 2px solid rgba(255, 255, 255, 0.3);
    display: flex;
    flex-direction: column;
    align-items: center;
}

.feature-card h3 {
    margin-bottom: 0.75rem;
    color: var(--neutral-dark);
    font-weight: 600;
    font-size: 1.1rem;
}

.feature-card p {
    color: var(--neutral-dark); /* Changed from gray to dark */
    font-size: 0.9rem;
    font-weight: 500;
    margin: 0;
}

/* Update stats and progress items */
.stat-item {
    text-align: center;
    padding: 1.5rem;
    background: rgba(255, 255, 255, 0.95); /* Increased opacity */
    border-radius: 12px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    box-shadow: var(--shadow-md);
}

.stat-label {
    color: var(--neutral-dark); /* Changed from gray to dark */
    font-size: 0.9rem;
    font-weight: 500;
}

/* Update document sections */
.document-section {
    background: rgba(255, 255, 255, 0.95); /* Increased opacity */
    border-radius: 12px;
    padding: 1.5rem;
    margin: 1.5rem 0;
    border: 2px solid rgba(67, 97, 238, 0.2);
    box-shadow: var(--shadow-md);
}

.document-info h4 {
    margin: 0;
    color: var(--neutral-dark);
    font-size: 1.1rem;
}

.document-info p {
    margin: 0.25rem 0 0 0;
    color: var(--neutral-dark); /* Changed from gray to dark */
    font-size: 0.9rem;
}
/* Enhanced Text Visibility for All Devices */
/* These styles apply to both desktop and mobile */

/* Hero Card - Improved Contrast */
.hero-card {
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.98) 0%, rgba(255, 255, 255, 0.95) 100%);
    backdrop-filter: blur(20px);
    padding: 2.5rem;
    border-radius: 20px;
    text-align: center;
    box-shadow: 
        0 20px 40px rgba(0, 0, 0, 0.15),
        0 0 0 1px rgba(255, 255, 255, 0.5);
    border: 1px solid rgba(255, 255, 255, 0.8);
    position: relative;
    z-index: 2;
}

.hero-card h1 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    background: linear-gradient(135deg, var(--neutral-dark) 0%, #1a202c 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-weight: 800;
    line-height: 1.2;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.hero-card p {
    font-size: 1.2rem;
    color: var(--neutral-dark);
    margin-bottom: 2rem;
    font-weight: 600;
    line-height: 1.5;
    opacity: 0.9;
}

/* Content Cards - Enhanced Readability */
.content-card {
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.96) 0%, rgba(255, 255, 255, 0.92) 100%);
    backdrop-filter: blur(15px);
    padding: 2rem;
    border-radius: 16px;
    box-shadow: 
        0 10px 25px rgba(0, 0, 0, 0.1),
        0 0 0 1px rgba(255, 255, 255, 0.6);
    border: 1px solid rgba(255, 255, 255, 0.7);
    position: relative;
    z-index: 2;
}

.content-card h2 {
    color: var(--neutral-dark);
    margin-bottom: 1.5rem;
    font-size: 1.8rem;
    font-weight: 700;
    line-height: 1.3;
    border-bottom: 3px solid var(--vibrant-blue);
    padding-bottom: 0.5rem;
}

.content-card h3 {
    color: var(--neutral-dark);
    margin-bottom: 1rem;
    font-size: 1.4rem;
    font-weight: 600;
    line-height: 1.3;
}

.content-card h4 {
    color: var(--neutral-dark);
    margin-bottom: 0.75rem;
    font-size: 1.2rem;
    font-weight: 600;
    line-height: 1.3;
}

.content-card p {
    color: var(--neutral-dark);
    line-height: 1.6;
    margin-bottom: 1rem;
    opacity: 0.9;
}

/* Feature Cards - Better Contrast */
.feature-card {
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.95) 0%, rgba(255, 255, 255, 0.9) 100%);
    backdrop-filter: blur(15px);
    padding: 2rem;
    border-radius: 16px;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 
        0 8px 20px rgba(0, 0, 0, 0.08),
        0 0 0 1px rgba(255, 255, 255, 0.5);
    border: 1px solid rgba(255, 255, 255, 0.6);
    display: flex;
    flex-direction: column;
    align-items: center;
    position: relative;
    z-index: 2;
}

.feature-card h3 {
    margin-bottom: 0.75rem;
    color: var(--neutral-dark);
    font-weight: 600;
    font-size: 1.1rem;
}

.feature-card p {
    color: var(--neutral-dark);
    font-size: 0.9rem;
    font-weight: 500;
    margin: 0;
    opacity: 0.9;
}

/* Header - Improved Visibility */
.header {
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.98) 0%, rgba(255, 255, 255, 0.95) 100%);
    backdrop-filter: blur(20px);
    padding: 1rem 2rem;
    box-shadow: var(--shadow-lg);
    position: sticky;
    top: 0;
    z-index: 1000;
    border-bottom: 3px solid;
    border-image: var(--gradient-primary) 1;
}

.logo-text h1 {
    font-size: 1.6rem;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 0.2rem;
    font-weight: 700;
}

.logo-text p {
    font-size: 0.9rem;
    color: var(--neutral-dark);
    font-weight: 600;
    opacity: 0.9;
}

/* Sidebar - Better Text Contrast */
.sidebar {
    width: 280px;
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.95) 0%, rgba(255, 255, 255, 0.9) 100%);
    backdrop-filter: blur(20px);
    border-radius: 20px;
    box-shadow: var(--shadow-xl);
    height: fit-content;
    position: sticky;
    top: 120px;
    border: 1px solid rgba(255, 255, 255, 0.6);
    flex-shrink: 0;
}

.sidebar-header h3 {
    color: var(--neutral-dark);
    font-size: 1.1rem;
    font-weight: 600;
    text-align: center;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem 1.25rem;
    background: none;
    border: none;
    border-radius: 12px;
    cursor: pointer;
    transition: all 0.3s ease;
    color: var(--neutral-dark);
    font-size: 0.95rem;
    text-align: left;
    font-weight: 500;
    width: 100%;
    opacity: 0.9;
}

.nav-item:hover {
    background: rgba(67, 97, 238, 0.1);
    transform: translateX(5px);
    color: var(--vibrant-blue);
    opacity: 1;
}

.nav-item.active {
    background: var(--gradient-primary);
    color: var(--neutral-white);
    box-shadow: var(--shadow-md);
    opacity: 1;
}

/* Research Notice - Enhanced Visibility */
.research-notice {
    background: linear-gradient(135deg, rgba(67, 97, 238, 0.15) 0%, rgba(114, 9, 183, 0.1) 100%);
    border: 2px solid rgba(67, 97, 238, 0.3);
    border-radius: 12px;
    padding: 1.25rem;
    margin: 1.5rem 0;
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    position: relative;
    z-index: 2;
}

.research-notice strong {
    color: var(--neutral-dark);
    display: block;
    margin-bottom: 0.25rem;
    font-size: 0.95rem;
}

.research-notice p {
    color: var(--neutral-dark);
    margin: 0;
    font-size: 0.9rem;
    line-height: 1.5;
    opacity: 0.9;
}

/* Stats and Progress Items */
.stat-item {
    text-align: center;
    padding: 1.5rem;
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.9) 0%, rgba(255, 255, 255, 0.85) 100%);
    border-radius: 12px;
    border: 1px solid rgba(255, 255, 255, 0.6);
    box-shadow: var(--shadow-md);
    position: relative;
    z-index: 2;
}

.stat-label {
    color: var(--neutral-dark);
    font-size: 0.9rem;
    font-weight: 500;
    opacity: 0.9;
}

/* Document Sections */
.document-section {
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.92) 0%, rgba(255, 255, 255, 0.88) 100%);
    border-radius: 12px;
    padding: 1.5rem;
    margin: 1.5rem 0;
    border: 2px solid rgba(67, 97, 238, 0.2);
    box-shadow: var(--shadow-md);
    position: relative;
    z-index: 2;
}

.document-info h4 {
    margin: 0;
    color: var(--neutral-dark);
    font-size: 1.1rem;
}

.document-info p {
    margin: 0.25rem 0 0 0;
    color: var(--neutral-dark);
    font-size: 0.9rem;
    opacity: 0.9;
}

/* Abstract Background Adjustment */
.abstract-bg {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    opacity: 0.15; /* Reduced opacity for better text contrast */
    background: 
        radial-gradient(circle at 20% 20%, var(--vibrant-blue) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, var(--vibrant-pink) 0%, transparent 50%),
        radial-gradient(circle at 40% 80%, var(--vibrant-yellow) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, var(--vibrant-green) 0%, transparent 50%);
    filter: blur(60px);
    animation: float 20s ease-in-out infinite;
}

/* Body background adjustment */
body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    color: var(--neutral-dark);
    line-height: 1.6;
    position: relative;
    overflow-x: hidden;
}

/* Mobile Responsive Adjustments */
@media (max-width: 1024px) {
    .container {
        flex-direction: column;
        padding: 1.5rem;
        gap: 1.5rem;
    }
    
    .sidebar {
        width: 100%;
        position: fixed;
        top: 0;
        left: 0;
        height: 100vh;
        z-index: 1000;
        transform: translateX(-100%);
        border-radius: 0;
        transition: transform 0.3s ease;
        background: linear-gradient(135deg, rgba(255, 255, 255, 0.95) 0%, rgba(255, 255, 255, 0.9) 100%);
    }
    
    .sidebar.active {
        transform: translateX(0);
    }
    
    .sidebar-close {
        display: block;
    }
    
    .sidebar-overlay.active {
        display: block;
    }
    
    .hero-card {
        padding: 2rem 1.5rem;
    }
    
    .hero-card h1 {
        font-size: 2rem;
    }
}

@media (max-width: 768px) {
    .header {
        padding: 1rem;
        background: linear-gradient(135deg, rgba(255, 255, 255, 0.98) 0%, rgba(255, 255, 255, 0.95) 100%);
    }
    
    .hero-card {
        padding: 1.5rem 1rem;
    }
    
    .hero-card h1 {
        font-size: 1.8rem;
    }
    
    .hero-card p {
        font-size: 1.1rem;
    }
    
    .content-card {
        padding: 1.5rem;
    }
    
    .content-card h2 {
        font-size: 1.5rem;
    }
    
    .content-card h3 {
        font-size: 1.3rem;
    }
    
    .feature-card {
        padding: 1.5rem;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 1rem;
    }
    
    .hero-card {
        padding: 1.25rem 0.75rem;
    }
    
    .hero-card h1 {
        font-size: 1.6rem;
    }
    
    .hero-card p {
        font-size: 1rem;
    }
    
    .content-card {
        padding: 1rem;
    }
    
    .content-card h2 {
        font-size: 1.4rem;
    }
    
    .content-card h3 {
        font-size: 1.2rem;
    }
    
    .feature-card {
        padding: 1.25rem;
    }
    
    .research-notice {
        padding: 1rem;
    }
}

/* Extra small devices */
@media (max-width: 360px) {
    .hero-card h1 {
        font-size: 1.4rem;
    }
    
    .hero-card p {
        font-size: 0.9rem;
    }
    
    .content-card h2 {
        font-size: 1.3rem;
    }
}
/* Mobile Header Size Fix */
@media (max-width: 768px) {
    .header {
        padding: 0.5rem 1rem !important;
        min-height: 60px !important;
    }
    
    .header-content {
        gap: 1rem !important;
        padding: 0 !important;
    }
    
    .logo {
        gap: 0.75rem !important;
    }
    
    .logo-image img {
        width: 40px !important;
        height: 40px !important;
    }
    
    .logo-text h1 {
        font-size: 1.1rem !important;
        margin-bottom: 0.1rem !important;
    }
    
    .logo-text p {
        font-size: 0.75rem !important;
    }
    
    .user-info {
        gap: 0.75rem !important;
    }
    
    .user-welcome {
        font-size: 0.8rem !important;
        gap: 0.25rem !important;
    }
    
    .user-welcome i {
        font-size: 1rem !important;
    }
    
    .logout-btn {
        padding: 0.4rem 0.8rem !important;
        font-size: 0.8rem !important;
    }
    
    .menu-toggle {
        font-size: 1.2rem !important;
        padding: 0.25rem !important;
    }
}

@media (max-width: 480px) {
    .header {
        padding: 0.4rem 0.75rem !important;
        min-height: 55px !important;
    }
    
    .logo-image img {
        width: 35px !important;
        height: 35px !important;
    }
    
    .logo-text h1 {
        font-size: 1rem !important;
    }
    
    .logo-text p {
        font-size: 0.7rem !important;
    }
    
    .user-welcome {
        display: none !important; /* Hide welcome text on very small screens */
    }
    
    .user-info {
        gap: 0.5rem !important;
    }
}

/* For very small screens - further reduce size */
@media (max-width: 360px) {
    .header {
        padding: 0.3rem 0.5rem !important;
        min-height: 50px !important;
    }
    
    .logo {
        gap: 0.5rem !important;
    }
    
    .logo-image img {
        width: 30px !important;
        height: 30px !important;
    }
    
    .logo-text h1 {
        font-size: 0.9rem !important;
    }
    
    .logout-btn {
        padding: 0.3rem 0.6rem !important;
        font-size: 0.75rem !important;
    }
    
    .menu-toggle {
        font-size: 1rem !important;
    }
}

/* Optional: Make header more compact on mobile */
@media (max-width: 768px) {
    .header-content {
        flex-wrap: nowrap !important;
    }
    
    .user-info {
        order: 0 !important; /* Keep user info on the right */
        width: auto !important;
        justify-content: flex-end !important;
    }
}
.bg-orange {
    background: var(--gradient-secondary); /* Since gradient-secondary uses pink and orange */
}


/* Utility Classes */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }
.w-full { width: 100%; }
.h-full { height: 100%; }
.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.gap-1 { gap: 0.5rem; }
.gap-2 { gap: 1rem; }
.gap-3 { gap: 1.5rem; }
.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }
.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }