/* =========================================
   DESIGN SYSTEM - TOKENS & VARIABLES
   ========================================= */
:root {
    /* Colors - Dark Premium Palette */
    --bg-base: #0f111a;
    --bg-surface: #1a1d2d;
    --bg-surface-hover: #24283b;
    --text-primary: #f8f8f2;
    --text-secondary: #a9b1d6;
    --accent-primary: #7aa2f7;
    --accent-secondary: #bb9af7;
    --accent-glow: rgba(122, 162, 247, 0.4);
    --border-color: rgba(255, 255, 255, 0.08);
    --glass-bg: rgba(26, 29, 45, 0.6);
    --glass-border: rgba(255, 255, 255, 0.05);

    /* Rating Colors */
    --star-active: #e0af68;
    --star-inactive: #414868;

    /* Status Colors */
    --status-reading: #7dcfff;
    --status-want: #bb9af7;
    --status-read: #9ece6a;

    /* Typography */
    --font-sans: 'Outfit', sans-serif;
    --font-serif: 'Playfair Display', serif;

    /* Elevations & Shadows */
    --shadow-sm: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 10px 15px rgba(0, 0, 0, 0.2);
    --shadow-glow: 0 0 20px var(--accent-glow);

    /* Layout */
    --container-width: 1200px;
    --nav-height: 80px;

    /* Transitions */
    --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-smooth: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* =========================================
   RESET & BASE STYLES
   ========================================= */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: var(--font-sans);
    background-color: #0d0e16;
    /* Fundo base ligeiramente mais profundo */
    color: var(--text-primary);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
}

ul {
    list-style: none;
}

a {
    text-decoration: none;
    color: inherit;
}

button {
    border: none;
    background: none;
    cursor: pointer;
    font-family: inherit;
    color: inherit;
}

.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 2rem;
}

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

/* =========================================
   UTILITIES
   ========================================= */
.glass-effect {
    background: var(--glass-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--glass-border);
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    border-radius: 8px;
    font-weight: 600;
    font-size: 1rem;
    transition: var(--transition-fast);
}

.btn-primary {
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    color: #fff;
    box-shadow: 0 4px 15px rgba(122, 162, 247, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(122, 162, 247, 0.5);
    filter: brightness(1.1);
}

/* =========================================
   NAVIGATION (NAVBAR)
   ========================================= */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    height: var(--nav-height);
    z-index: 100;
    border-bottom: 1px solid var(--border-color);
}

.nav-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 100%;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-family: var(--font-serif);
    font-size: 1.5rem;
    font-weight: 600;
    letter-spacing: -0.5px;
    color: var(--accent-primary);
}

.logo i {
    font-size: 2rem;
}

.search-bar {
    display: flex;
    align-items: center;
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    padding: 0.5rem 1.25rem;
    width: 400px;
    transition: var(--transition-fast);
}

.search-bar:focus-within {
    border-color: var(--accent-primary);
    box-shadow: var(--shadow-glow);
}

.search-bar i {
    color: var(--text-secondary);
    font-size: 1.2rem;
}

.search-bar input {
    background: transparent;
    border: none;
    color: var(--text-primary);
    width: 100%;
    padding: 0.25rem 0.75rem;
    font-family: var(--font-sans);
    outline: none;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 2rem;
}

.nav-links a {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-secondary);
    font-weight: 500;
    transition: var(--transition-fast);
}

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

.user-profile img {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    border: 2px solid var(--accent-primary);
    transition: var(--transition-smooth);
}

.user-profile:hover img {
    transform: scale(1.1);
    box-shadow: var(--shadow-glow);
}

/* =========================================
   MAIN LAYOUT & SIDEBAR
   ========================================= */
.main-layout {
    display: grid;
    grid-template-columns: 250px 1fr;
    gap: 3rem;
    margin-top: calc(var(--nav-height) + 2rem);
    padding-bottom: 4rem;
}

.sidebar {
    position: sticky;
    top: calc(var(--nav-height) + 2rem);
    height: max-content;
}

.sidebar-title {
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
}

.shelf-filters {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.filter-btn {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
    padding: 0.75rem 1rem;
    border-radius: 8px;
    color: var(--text-secondary);
    font-weight: 500;
    transition: var(--transition-fast);
}

.filter-btn span {
    background: var(--bg-surface);
    padding: 0.1rem 0.6rem;
    border-radius: 20px;
    font-size: 0.8rem;
    color: var(--text-primary);
    transition: var(--transition-fast);
}

.filter-btn:hover {
    background: var(--bg-surface);
    color: var(--text-primary);
}

.filter-btn.active {
    background: var(--accent-glow);
    color: var(--accent-primary);
    border-left: 3px solid var(--accent-primary);
}

.filter-btn.active span {
    background: var(--accent-primary);
}

/* =========================================
   BOOK BOARD / GRID
   ========================================= */
.board-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2.5rem;
}

.board-header h2 {
    font-family: var(--font-serif);
    font-size: 2.5rem;
    font-weight: 600;
}

.books-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 2.5rem;
}

/* =========================================
   BOOK CARD COMPONENT
   ========================================= */
.book-card {
    position: relative;
    border-radius: 12px;
    background: var(--bg-surface);
    padding: 1rem;
    transition: var(--transition-smooth);
    border: 1px solid var(--border-color);
    cursor: pointer;
    display: flex;
    flex-direction: column;
    height: 100%;
}

.book-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-md);
    border-color: var(--accent-primary);
}

.book-cover-wrapper {
    position: relative;
    width: 100%;
    padding-top: 150%;
    /* 2:3 Aspect Ratio */
    border-radius: 8px;
    overflow: hidden;
    margin-bottom: 1rem;
    box-shadow: var(--shadow-sm);
}

.book-cover {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition-smooth);
}

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

/* Status Badges */
.status-badge {
    position: absolute;
    top: 10px;
    right: 10px;
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 700;
    backdrop-filter: blur(4px);
    background: rgba(0, 0, 0, 0.6);
    border: 1px solid rgba(255, 255, 255, 0.2);
    z-index: 2;
}

.status-reading .status-badge {
    color: var(--status-reading);
}

.status-want .status-badge {
    color: var(--status-want);
}

.status-read .status-badge {
    color: var(--status-read);
}

.book-info {
    flex-grow: 1;
    display: flex;
    flex-direction: column;
}

.book-title {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 0.25rem;
    line-height: 1.3;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.book-author {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: 0.75rem;
}

/* Rating Stars */
.rating {
    margin-top: auto;
    display: flex;
    gap: 0.25rem;
}

.rating i {
    color: var(--star-inactive);
    font-size: 1rem;
}

.rating i.filled {
    color: var(--star-active);
}

/* =========================================
   MODAL (BOOK DETAILS)
   ========================================= */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
    opacity: 0;
    pointer-events: none;
    transition: var(--transition-smooth);
}

.modal-overlay.active {
    opacity: 1;
    pointer-events: auto;
}

.modal {
    width: 90%;
    max-width: 900px;
    max-height: 90vh;
    border-radius: 16px;
    position: relative;
    overflow-y: auto;
    transform: scale(0.95);
    transition: var(--transition-smooth);
    padding: 2.5rem;
}

.modal-overlay.active .modal {
    transform: scale(1);
}

.close-modal {
    position: absolute;
    top: 1.5rem;
    right: 1.5rem;
    font-size: 1.5rem;
    color: var(--text-secondary);
    transition: var(--transition-fast);
}

.close-modal:hover {
    color: var(--text-primary);
    transform: rotate(90deg);
}

/* Details Layout */
.details-layout {
    display: grid;
    grid-template-columns: 250px 1fr;
    gap: 2.5rem;
}

.details-cover {
    width: 100%;
    border-radius: 8px;
    box-shadow: var(--shadow-md);
}

.details-header h1 {
    font-family: var(--font-serif);
    font-size: 2.5rem;
    line-height: 1.2;
    margin-bottom: 0.5rem;
}

.details-author {
    font-size: 1.2rem;
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
}

.meta-stats {
    display: flex;
    gap: 2rem;
    margin-bottom: 2rem;
    padding-bottom: 2rem;
    border-bottom: 1px solid var(--border-color);
}

.stat-item {
    display: flex;
    flex-direction: column;
}

.stat-label {
    font-size: 0.8rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.stat-value {
    font-size: 1.2rem;
    font-weight: 600;
}

.details-synopsis h3 {
    margin-bottom: 1rem;
    font-size: 1.2rem;
}

.details-synopsis p {
    color: var(--text-secondary);
    margin-bottom: 2rem;
}

/* Review Section */
.review-section {
    background: rgba(0, 0, 0, 0.2);
    padding: 1.5rem;
    border-radius: 12px;
    border: 1px solid var(--border-color);
}

.review-section h3 {
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

textarea.review-input {
    width: 100%;
    min-height: 120px;
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 1rem;
    color: var(--text-primary);
    font-family: var(--font-sans);
    resize: vertical;
    margin-bottom: 1rem;
    transition: var(--transition-fast);
}

textarea.review-input:focus {
    outline: none;
    border-color: var(--accent-primary);
}

/* Responsive */
@media (max-width: 900px) {
    .main-layout {
        grid-template-columns: 1fr;
    }

    .sidebar {
        position: static;
        margin-bottom: 2rem;
    }

    .details-layout {
        grid-template-columns: 1fr;
    }

    .details-cover {
        max-width: 200px;
        margin: 0 auto;
    }
}

/* Discover Feed Horizontal Scroll */
.discover-row::-webkit-scrollbar {
    height: 8px;
}

.discover-row::-webkit-scrollbar-track {
    background: rgba(255, 255, 255, 0.05);
    border-radius: 4px;
}

.discover-row::-webkit-scrollbar-thumb {
    background: var(--accent-primary);
    border-radius: 4px;
}

.discover-row {
    scrollbar-color: var(--accent-primary) rgba(255, 255, 255, 0.05);
    scroll-snap-type: x mandatory;
    scroll-padding-left: 1rem;
    padding-left: 1rem;
    padding-right: 1rem;
    margin-left: -1rem;
    margin-right: -1rem;
}

.discover-card {
    scroll-snap-align: start;
    flex: 0 0 auto;
    transition: transform 0.3s ease;
}

.discover-card:hover {
    transform: scale(1.02);
}

/* =========================================
   FOOTER
   ========================================= */
.footer {
    margin-top: 6rem;
    padding: 5rem 0 3rem 0;
    border-top: 1px solid var(--border-color);
    background-color: #121422;
    /* Diferença sutil de cor no rodapé */
}

.footer-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    margin-bottom: 4rem;
}

.footer-col-main .logo {
    margin-bottom: 1.5rem;
}

.footer-desc {
    color: var(--text-secondary);
    font-size: 1rem;
    line-height: 1.6;
    max-width: 400px;
    margin-bottom: 2rem;
}

.footer-col-links {
    display: flex;
    gap: 5rem;
}

.footer-title {
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    color: var(--accent-primary);
    font-weight: 700;
    margin-bottom: 1.5rem;
}

.footer-links {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.footer-links a {
    color: var(--text-secondary);
    font-size: 0.95rem;
    transition: var(--transition-fast);
}

.footer-links a:hover {
    color: var(--text-primary);
}

.footer-social {
    display: flex;
    gap: 1rem;
}

.social-link {
    width: 44px;
    height: 44px;
    border-radius: 12px;
    background: var(--bg-surface);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    color: var(--text-secondary);
    transition: var(--transition-smooth);
    border: 1px solid var(--border-color);
}

.social-link:hover {
    background: var(--accent-primary);
    color: #fff;
    transform: translateY(-3px);
    border-color: transparent;
}

.footer-bottom {
    padding-top: 3rem;
    border-top: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: rgba(169, 177, 214, 0.5);
    font-size: 0.85rem;
}

@media (max-width: 900px) {
    .footer-col-links {
        gap: 3rem;
    }
}

@media (max-width: 600px) {
    .footer-grid {
        grid-template-columns: 1fr;
        gap: 3rem;
    }

    .footer-col-links {
        flex-direction: column;
        gap: 2.5rem;
    }

    .footer-bottom {
        flex-direction: column;
        gap: 1rem;
        text-align: center;
    }
}

/* =========================================
   SOCIAL FEED (VERTICAL REFACTOR)
   ========================================= */
.social-feed-container {
    display: flex;
    flex-direction: column;
    gap: 2rem;
    max-width: 800px;
    margin: 1rem auto 3rem auto;
}

.feed-item {
    display: grid;
    grid-template-columns: 140px 1fr;
    gap: 2rem;
    background: var(--bg-surface);
    padding: 1.5rem;
    border-radius: 16px;
    border: 1px solid var(--border-color);
    transition: var(--transition-smooth);
    position: relative;
    overflow: hidden;
}

.feed-item:hover {
    border-color: var(--accent-primary);
    transform: translateX(5px);
}

.feed-cover-wrapper {
    width: 140px;
    height: 210px;
    /* 2:3 Aspect Ratio */
    border-radius: 8px;
    overflow: hidden;
    box-shadow: var(--shadow-md);
    flex-shrink: 0;
}

.feed-cover {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.feed-content {
    display: flex;
    flex-direction: column;
}

.feed-user-info {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 0.5rem;
}

.feed-user-info span {
    font-weight: 600;
    color: var(--accent-primary);
}

.feed-action-text {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.feed-book-title {
    font-family: var(--font-serif);
    font-size: 1.5rem;
    margin-bottom: 0.25rem;
    color: var(--text-primary);
    line-height: 1.2;
}

.feed-book-author {
    color: var(--text-secondary);
    font-size: 1rem;
    margin-bottom: 1rem;
}

.feed-review-snippet {
    background: rgba(122, 162, 247, 0.05);
    border-left: 3px solid var(--accent-primary);
    padding: 1rem;
    border-radius: 0 8px 8px 0;
    margin-top: 1rem;
    position: relative;
}

.feed-review-snippet p {
    font-style: italic;
    color: var(--text-primary);
    font-size: 0.95rem;
    line-height: 1.5;
    margin: 0;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.feed-rating {
    display: flex;
    gap: 0.2rem;
    margin-bottom: 0px;
}

.feed-rating i {
    font-size: 0.9rem;
    color: var(--star-inactive);
}

.feed-rating i.filled {
    color: var(--star-active);
}

@media (max-width: 600px) {
    .feed-item {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }

    .feed-cover-wrapper {
        width: 120px;
        height: 180px;
        margin: 0 auto;
    }

    .feed-content {
        text-align: center;
    }

    .feed-user-info,
    .feed-rating {
        justify-content: center;
    }
}