/* Modern RONAS-inspired Design System */
:root {
    /* Primary Colors - Vibrant Gradient Blues */
    --primary-color: #5B86E5;
    --primary-dark: #4A6FC8;
    --primary-light: #E8F0FF;
    --secondary-color: #36D1DC;
    --accent-color: #FF6B9D;
    
    /* Text Colors */
    --text-primary: #1A1D29;
    --text-secondary: #6B7280;
    --text-muted: #9CA3AF;
    
    /* Background Colors */
    --background: #F9FAFB;
    --surface: #FFFFFF;
    --border-color: #E5E7EB;
    
    /* Shadows - Tailwind-inspired */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    
    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --radius-2xl: 32px;
    
    /* Spacing */
    --spacing-xs: 8px;
    --spacing-sm: 12px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
    --spacing-2xl: 48px;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Roboto', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: linear-gradient(135deg, #F9FAFB 0%, #E8F0FF 100%);
    background-attachment: fixed;
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Modern Glassmorphism Top App Bar */
.mdc-top-app-bar {
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: saturate(180%) blur(20px);
    -webkit-backdrop-filter: saturate(180%) blur(20px);
    color: var(--text-primary);
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    box-shadow: 0 1px 0 0 rgba(0, 0, 0, 0.05);
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
}

.mdc-top-app-bar__row {
    display: flex;
    align-items: center;
    height: 72px;
    max-width: 1440px;
    margin: 0 auto;
    padding: 0 var(--spacing-xl);
}

.mdc-top-app-bar__section {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.mdc-top-app-bar__section--align-start {
    justify-content: flex-start;
    flex: 1;
}

.mdc-top-app-bar__section--align-end {
    justify-content: flex-end;
}

.mdc-top-app-bar__title {
    font-size: 1.5rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: -0.5px;
}

.mdc-top-app-bar--fixed-adjust {
    padding-top: 72px;
}

/* Modern Icon Button */
.mdc-icon-button {
    width: 44px;
    height: 44px;
    padding: 10px;
    border: none;
    background: transparent;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
}

.mdc-icon-button:hover {
    background-color: var(--primary-light);
    color: var(--primary-color);
    transform: scale(1.05);
}

.mdc-icon-button:active {
    transform: scale(0.95);
}

/* Modern Button with Gradient */
.mdc-button {
    font-family: 'Roboto', sans-serif;
    font-size: 0.9375rem;
    font-weight: 600;
    letter-spacing: 0.3px;
    padding: 12px 24px;
    height: auto;
    border: none;
    border-radius: var(--radius-md);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    cursor: pointer;
    position: relative;
    overflow: hidden;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    background-color: transparent;
    color: var(--primary-color);
}

.mdc-button--raised {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    color: white;
    box-shadow: var(--shadow-md);
}

.mdc-button--raised:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-2px);
}

.mdc-button--raised:active {
    transform: translateY(0);
    box-shadow: var(--shadow-md);
}

.mdc-button__ripple {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    pointer-events: none;
}

.mdc-button__label {
    position: relative;
    z-index: 1;
}

/* Modern Library Page */
.library-container {
    max-width: 1440px;
    margin: 0 auto;
    padding: var(--spacing-2xl) var(--spacing-xl);
}

.library-title {
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
    letter-spacing: -1px;
}

.library-subtitle {
    font-size: 1.125rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-2xl);
    font-weight: 400;
}

.book-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
    gap: var(--spacing-xl);
    padding-bottom: var(--spacing-2xl);
}

/* Modern Book Card with Hover Effects */
.book-card {
    background: var(--surface);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow);
    overflow: hidden;
    cursor: pointer;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    border: 1px solid var(--border-color);
    position: relative;
    display: flex;
    flex-direction: column;
}

.book-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.book-card:hover {
    transform: translateY(-8px) scale(1.02);
    box-shadow: var(--shadow-xl);
    border-color: var(--primary-light);
}

.book-card:hover::before {
    opacity: 1;
}

.book-card-image {
    width: 100%;
    height: 380px;
    object-fit: cover;
    background: linear-gradient(135deg, var(--primary-light) 0%, #FFF5F7 100%);
    transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
}

.book-card:hover .book-card-image {
    transform: scale(1.05);
}

.book-card-content {
    padding: var(--spacing-lg);
    background: var(--surface);
}

.book-card-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-xs);
    color: var(--text-primary);
    letter-spacing: -0.5px;
    line-height: 1.3;
}

.book-card-subtitle {
    font-size: 0.9375rem;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 500;
}

.book-card-subtitle::before {
    content: '📖';
    font-size: 1.125rem;
}

/* Responsive Design */
@media (max-width: 1024px) {
    .book-grid {
        grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
        gap: var(--spacing-lg);
    }
}

@media (max-width: 768px) {
    .mdc-top-app-bar__row {
        padding: 0 var(--spacing-md);
    }
    
    .mdc-top-app-bar__title {
        font-size: 1.25rem;
    }
    
    .library-container {
        padding: var(--spacing-xl) var(--spacing-md);
    }
    
    .library-title {
        font-size: 2rem;
    }
    
    .library-subtitle {
        font-size: 1rem;
    }
    
    .book-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }
    
    .book-card-image {
        height: 320px;
    }
}

@media (max-width: 480px) {
    .mdc-top-app-bar__title {
        font-size: 1.125rem;
    }
    
    .library-title {
        font-size: 1.75rem;
    }
    
    .book-card-title {
        font-size: 1.25rem;
    }
}

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

.book-card {
    animation: fadeIn 0.5s ease-out forwards;
}