@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@300;400;500;600;700&display=swap');

:root {
    /* Paleta extraída do Adobe Color - Tema de Cores */
    --md-primary-rgb: 7, 98, 240;       /* #0762F0 - Royal Blue */
    --md-secondary-rgb: 58, 113, 194;   /* #3A71C2 - Slate Blue */
    --md-gold-rgb: 246, 179, 6;         /* #F6B306 - Gold Highlight */
    --md-teal-rgb: 95, 155, 174;        /* #5F9BAE - Muted Teal */
    --md-cerulean-rgb: 26, 131, 182;    /* #1A83B6 - Cerulean Active */

    /* Sistema de Cores Material Design 3 e UI customizada */
    --primary: rgb(var(--md-primary-rgb));
    --primary-light: rgba(var(--md-primary-rgb), 0.12);
    --secondary: rgb(var(--md-secondary-rgb));
    --accent: rgb(var(--md-gold-rgb));
    --muted-teal: rgb(var(--md-teal-rgb));
    --cerulean: rgb(var(--md-cerulean-rgb));

    /* Modo Claro / Premium Light Slate */
    --background: #F8FAFC;
    --surface: #FFFFFF;
    --surface-elevated: #F1F5F9;
    --on-background: #0F172A;
    --on-surface: #1E293B;
    --on-surface-variant: #64748B;
    --border: rgba(15, 23, 42, 0.08);

    /* Efeitos e Bordas */
    --radius-sm: 8px;
    --radius-md: 16px;
    --radius-lg: 24px;
    --shadow: 0 8px 30px 0 rgba(15, 23, 42, 0.04);
    --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
    font-family: 'Outfit', sans-serif;
    background-color: var(--background);
    color: var(--on-background);
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
}

/* Base Layout */
.app-container {
    display: flex;
    min-height: 100vh;
}

/* Sidebar Navigation (Sleek Dark Mode Glassmorphism) */
.sidebar {
    width: 280px;
    background-color: var(--surface);
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    padding: 2rem 1.5rem;
    position: fixed;
    height: 100vh;
}

.brand-section {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 3rem;
}

.brand-logo {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, var(--primary), var(--cerulean));
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #FFF;
    font-weight: bold;
    font-size: 1.25rem;
    box-shadow: 0 4px 14px rgba(var(--md-primary-rgb), 0.4);
}

.brand-name {
    font-size: 1.35rem;
    font-weight: 700;
    background: linear-gradient(to right, var(--on-background), var(--on-surface-variant));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.menu-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    flex-grow: 1;
}

.menu-item a {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 0.85rem 1rem;
    color: var(--on-surface-variant);
    text-decoration: none;
    font-weight: 500;
    border-radius: var(--radius-md);
    transition: var(--transition);
}

.menu-item a:hover {
    color: var(--on-background);
    background-color: rgba(15, 23, 42, 0.03);
}

.menu-item.active a {
    color: var(--primary);
    background: linear-gradient(90deg, var(--primary-light) 0%, rgba(var(--md-primary-rgb), 0.02) 100%);
    border-left: 4px solid var(--primary);
    border-top-left-radius: 0;
    border-bottom-left-radius: 0;
}

.user-profile-section {
    border-top: 1px solid var(--border);
    padding-top: 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.user-avatar {
    width: 44px;
    height: 44px;
    background-color: var(--surface-elevated);
    border: 2px solid var(--cerulean);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    color: var(--on-background);
}

.user-info {
    display: flex;
    flex-direction: column;
}

.user-name {
    font-size: 0.95rem;
    font-weight: 600;
}

.user-role {
    font-size: 0.8rem;
    color: var(--on-surface-variant);
}

/* Main Content Area */
.main-content {
    margin-left: 280px;
    flex-grow: 1;
    padding: 2.5rem 3rem;
}

/* Header */
.content-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2.5rem;
}

.page-title h1 {
    font-size: 2.25rem;
    font-weight: 700;
    letter-spacing: -0.5px;
}

.page-title p {
    color: var(--on-surface-variant);
    font-size: 0.95rem;
    margin-top: 0.25rem;
}

/* Cards (Material Design 3 Glassmorphism Style) */
.md3-card {
    background-color: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.md3-card:hover {
    transform: translateY(-4px);
    border-color: rgba(var(--md-primary-rgb), 0.3);
    box-shadow: 0 12px 40px rgba(15, 23, 42, 0.08);
}

/* Buttons */
.btn {
    font-family: inherit;
    font-weight: 600;
    font-size: 0.95rem;
    padding: 0.75rem 1.5rem;
    border-radius: var(--radius-md);
    border: none;
    cursor: pointer;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--cerulean));
    color: #FFF;
    box-shadow: 0 4px 14px rgba(var(--md-primary-rgb), 0.3);
}

.btn-primary:hover {
    filter: brightness(1.1);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(var(--md-primary-rgb), 0.4);
}

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

.btn-secondary:hover {
    background-color: rgba(15, 23, 42, 0.03);
}

/* Search bar component */
.search-container {
    display: flex;
    gap: 1rem;
    margin-bottom: 2rem;
}

.search-input-wrapper {
    position: relative;
    flex-grow: 1;
}

.search-input {
    width: 100%;
    background-color: var(--surface);
    border: 1px solid var(--border);
    padding: 0.85rem 1.25rem;
    border-radius: var(--radius-md);
    color: var(--on-background);
    font-family: inherit;
    font-size: 1rem;
    transition: var(--transition);
}

.search-input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px var(--primary-light);
}

/* Grid layout for catalog */
.books-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1.5rem;
}

.book-card {
    display: flex;
    flex-direction: column;
    height: 100%;
}

.book-cover-placeholder {
    height: 180px;
    background: linear-gradient(135deg, rgba(var(--md-primary-rgb), 0.08) 0%, rgba(var(--md-cerulean-rgb), 0.08) 100%);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.25rem;
    position: relative;
    border: 1px dashed rgba(15, 23, 42, 0.08);
}

.book-cover-placeholder svg {
    width: 48px;
    height: 48px;
    fill: var(--on-surface-variant);
    opacity: 0.6;
}

.book-info {
    flex-grow: 1;
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
    margin-bottom: 1.25rem;
}

.book-title {
    font-size: 1.15rem;
    font-weight: 600;
    color: var(--on-background);
    line-height: 1.3;
}

.book-author {
    font-size: 0.9rem;
    color: var(--on-surface-variant);
}

.book-comment {
    font-size: 0.85rem;
    color: var(--on-surface-variant);
    font-style: italic;
    background-color: rgba(15, 23, 42, 0.02);
    padding: 0.5rem 0.75rem;
    border-radius: var(--radius-sm);
    margin-top: 0.5rem;
    border-left: 2px solid var(--accent);
}

.badge {
    position: absolute;
    top: 10px;
    right: 10px;
    padding: 0.35rem 0.75rem;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
}

.badge-available {
    background-color: rgba(26, 131, 182, 0.15);
    color: var(--cerulean);
    border: 1px solid rgba(26, 131, 182, 0.3);
}

.badge-reserved {
    background-color: rgba(246, 179, 6, 0.15);
    color: var(--accent);
    border: 1px solid rgba(246, 179, 6, 0.3);
}

/* Dashboard Statistics Widgets */
.metrics-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2.5rem;
}

.metric-card {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.metric-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: var(--on-surface-variant);
    font-size: 0.9rem;
    font-weight: 500;
}

.metric-value {
    font-size: 2.25rem;
    font-weight: 700;
    color: var(--on-background);
    line-height: 1;
}

.metric-footer {
    font-size: 0.8rem;
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.trend-up {
    color: #16A34A; /* Darker green for light background contrast */
}

.trend-neutral {
    color: var(--on-surface-variant);
}

/* Dashboard Charts Grid */
.dashboard-grid {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 1.5rem;
}

.chart-card {
    height: 350px;
    display: flex;
    flex-direction: column;
}

.chart-card-title {
    font-size: 1.15rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
}

.chart-placeholder {
    flex-grow: 1;
    display: flex;
    align-items: flex-end;
    gap: 1.5rem;
    padding-top: 1rem;
    border-bottom: 1px solid var(--border);
    border-left: 1px solid var(--border);
    padding-left: 1rem;
    margin-left: 1rem;
    position: relative;
}

.chart-bar-wrapper {
    flex-grow: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    height: 100%;
    justify-content: flex-end;
    gap: 0.5rem;
}

.chart-bar {
    width: 45px;
    background: linear-gradient(180deg, var(--primary) 0%, rgba(var(--md-primary-rgb), 0.2) 100%);
    border-radius: 6px 6px 0 0;
    transition: var(--transition);
    position: relative;
    box-shadow: 0 4px 10px rgba(var(--md-primary-rgb), 0.1);
}

.chart-bar:hover {
    filter: brightness(1.1);
}

.chart-bar.secondary-bar {
    background: linear-gradient(180deg, var(--cerulean) 0%, rgba(var(--md-cerulean-rgb), 0.2) 100%);
    box-shadow: 0 4px 10px rgba(var(--md-cerulean-rgb), 0.1);
}

.chart-bar.accent-bar {
    background: linear-gradient(180deg, var(--accent) 0%, rgba(var(--md-gold-rgb), 0.2) 100%);
    box-shadow: 0 4px 10px rgba(var(--md-gold-rgb), 0.1);
}

.chart-label {
    font-size: 0.75rem;
    color: var(--on-surface-variant);
    text-align: center;
    white-space: nowrap;
}

.chart-bar-value {
    position: absolute;
    top: -20px;
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--on-background);
}

/* Bottom Navigation for Mobile */
.bottom-nav {
    display: none;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    height: 68px;
    background-color: var(--surface);
    border-top: 1px solid var(--border);
    justify-content: space-around;
    align-items: center;
    z-index: 1000;
    padding: 0 1rem;
    box-shadow: 0 -4px 20px rgba(0, 0, 0, 0.04);
}

.bottom-nav-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: var(--on-surface-variant);
    text-decoration: none;
    font-size: 0.75rem;
    font-weight: 500;
    gap: 0.25rem;
    flex-grow: 1;
    height: 100%;
}

.bottom-nav-item.active {
    color: var(--primary);
}

.bottom-nav-item svg {
    width: 24px;
    height: 24px;
}

/* Media Query for Mobile Responsiveness */
@media (max-width: 768px) {
    .sidebar {
        display: none !important;
    }
    
    .main-content {
        margin-left: 0 !important;
        padding: 1.5rem 1.25rem 6rem 1.25rem !important; /* Extra bottom padding for bottom-nav */
    }
    
    .bottom-nav {
        display: flex !important;
    }
    
    .content-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 1.25rem;
    }
    
    .content-header .btn {
        width: 100%;
        justify-content: center;
    }
    
    .search-container {
        flex-direction: column;
        gap: 0.75rem;
    }
    
    .search-container .btn {
        width: 100%;
        justify-content: center;
    }
    
    .books-grid {
        grid-template-columns: 1fr !important; /* Single column on small mobile screens */
    }
    
    .dashboard-grid {
        grid-template-columns: 1fr !important;
        gap: 1.5rem;
    }
    
    .chart-card {
        height: 300px;
    }
    
    .chart-placeholder {
        gap: 0.75rem;
        margin-left: 0.5rem;
    }
    
    .chart-bar {
        width: 32px;
    }
}