@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600&family=Newsreader:ital,opsz,wght@0,6..72,400;0,6..72,600;0,6..72,700;1,6..72,400&display=swap');

:root {
    --white: #FFFFFF;
    --black: #0A0A0A;
    --cream: #F5F5F0;
    --gold: #C5A059;
    --gold-dark: #A68545;
    --gray-dark: #333333;
    --gray-medium: #666666;
    --gray-light: #EBEBE6;
    --deep-brown: #2C1E12;
    --max-width: 1200px;
    --font-heading: 'Newsreader', serif;
    --font-body: 'Inter', sans-serif;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    font-size: 18px;
    line-height: 1.6;
    color: var(--black);
    background-color: var(--cream);
    -webkit-font-smoothing: antialiased;
}

h1, h2, h3 {
    font-family: var(--font-heading);
    font-weight: 600;
    letter-spacing: -0.02em;
}

a {
    text-decoration: none;
    color: inherit;
    transition: all 0.3s ease;
}

ul {
    list-style: none;
}

img {
    max-width: 100%;
    display: block;
}

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

.section-padding {
    padding: 100px 0;
}

.btn {
    display: inline-block;
    padding: 12px 32px;
    font-weight: 600;
    border-radius: 4px;
    cursor: pointer;
    transition: transform 0.2s, background-color 0.3s;
}

.btn:active {
    transform: scale(0.98);
}

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

.btn-primary:hover {
    background-color: var(--gold);
}

.btn-outline {
    background-color: transparent;
    border: 1px solid var(--black);
    color: var(--black);
}

.btn-outline:hover {
    background-color: var(--black);
    color: var(--white);
}

/* Header & Nav */
header {
    position: sticky;
    top: 0;
    width: 100%;
    background: var(--cream);
    z-index: 1000;
    padding: 0;
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 90px;
}

.logo a {
    display: flex;
    align-items: center;
    gap: 12px;
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 1.6rem;
    font-style: italic;
    color: var(--black);
    text-decoration: none;
}

.logo img {
    height: 88px;
    width: auto;
    mix-blend-mode: multiply;
    filter: brightness(1.05) contrast(1.1);
}

.nav-links {
    display: flex;
    gap: 1.5rem;
    align-items: center;
}

.nav-links a {
    font-size: 0.9rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--black);
}

.nav-iai-btn {
    border: 1px solid var(--black);
    padding: 8px 16px;
    border-radius: 4px;
    font-size: 0.85rem;
}

.nav-portal-btn {
    background: var(--gold);
    color: white !important;
    padding: 8px 16px;
    border-radius: 4px;
    font-size: 0.85rem;
}

/* Hero Section */
.hero {
    padding: 120px 0 80px;
    background-color: var(--cream);
}

.hero-content {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    align-items: center;
    gap: 4rem;
}

.hero h1, .hero .hero-main-title {
    font-size: 4.5rem;
    margin-bottom: 1.5rem;
    line-height: 1;
}

.hero h2 {
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--gold-dark);
    margin-bottom: 2rem;
    font-weight: 700;
    font-family: var(--font-body);
}

.hero p {
    font-size: 1.2rem;
    margin-bottom: 3rem;
    color: var(--gray-dark);
    max-width: 520px;
}

.hero-image-wrapper {
    position: relative;
}

.hero-image img {
    border-radius: 0;
    box-shadow: none;
    filter: grayscale(100%);
    transition: filter 0.5s ease;
}

.hero-image img:hover {
    filter: grayscale(0%);
}

.hero-quote {
    background: var(--gray-light);
    padding: 2.5rem;
    margin-top: -60px;
    margin-left: 20px;
    position: relative;
    z-index: 2;
}

.hero-quote blockquote {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-style: italic;
    line-height: 1.4;
    margin-bottom: 1rem;
}

.hero-quote cite {
    font-size: 0.85rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    font-style: normal;
    color: var(--gray-medium);
}

/* About Section */
#autor {
    background: var(--gray-light);
    text-align: center;
}

.author-portrait {
    filter: grayscale(100%);
    transition: filter 0.5s ease;
}

.author-portrait:hover {
    filter: grayscale(0%);
}

.metrics-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    margin-top: 4rem;
}

.metric-item {
    text-align: left;
}

.metric-value {
    font-family: var(--font-heading);
    font-size: 3.5rem;
    color: var(--gold);
    line-height: 1;
    margin-bottom: 0.5rem;
    display: block;
}

.metric-label {
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--gray-medium);
}

.author-portrait {
    filter: grayscale(100%);
    transition: filter 0.5s ease;
}

#autor:hover .author-portrait {
    filter: grayscale(0%);
}

/* Book Section */
#libro {
    background-color: var(--white);
    padding: 120px 0;
}

.book-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 6rem;
    align-items: flex-start;
    perspective: 1500px;
}

.book-cover {
    position: sticky;
    top: 150px;
    z-index: 10;
    transform-style: preserve-3d;
    transform: rotateY(-20deg) rotateX(5deg);
    transition: transform 0.6s cubic-bezier(0.2, 0.8, 0.2, 1);
    animation: float 6s ease-in-out infinite;
}

@keyframes float {
    0% { transform: rotateY(-20deg) rotateX(5deg) translateY(0px); }
    50% { transform: rotateY(-25deg) rotateX(7deg) translateY(-15px); }
    100% { transform: rotateY(-20deg) rotateX(5deg) translateY(0px); }
}

.book-cover:hover {
    transform: rotateY(0deg) rotateX(0deg) scale(1.05);
}

.book-cover::after {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: url("https://www.transparenttextures.com/patterns/natural-paper.png");
    opacity: 0.2;
    pointer-events: none;
    mix-blend-mode: overlay;
}

.book-cover img {
    width: 100%;
    display: block;
    filter: brightness(0.9) contrast(1.1);
    mix-blend-mode: normal;
}

.book-3d {
    position: relative;
    width: 100%;
    max-width: 450px;
    transform-style: preserve-3d;
    box-shadow: 10px 10px 50px rgba(0,0,0,0.3);
}

.book-3d::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 40px;
    height: 100%;
    background: #1a140f; /* Color oscuro para el lomo */
    transform: rotateY(-90deg) translateX(-20px);
    transform-origin: left;
}

.book-front {
    width: 100%;
    height: auto;
    display: block;
    backface-visibility: hidden;
}

.tag {
    color: var(--gold-dark);
    font-weight: 700;
    text-transform: uppercase;
    font-size: 0.75rem;
    margin-bottom: 1.5rem;
    display: block;
}

#libro h2 {
    font-size: 3.5rem;
    margin-bottom: 1.5rem;
}

/* Analysis Section */
.analysis-section {
    background-color: var(--black);
    color: var(--white);
    padding: 120px 0;
}

.analysis-header {
    margin-bottom: 4rem;
}

.analysis-header h2 {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.chart-container {
    background: #111;
    padding: 3rem;
    border: 1px solid #222;
}

.iai-ranking-chart {
    height: 350px;
    display: flex !important;
    align-items: flex-end;
    gap: 12px;
    justify-content: space-between;
    width: 100%;
}

.iai-bar-wrapper {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    height: 100%;
    justify-content: flex-end;
}

.iai-bar {
    background: linear-gradient(to top, var(--gold-dark), var(--gold));
    width: 70%;
    min-width: 15px;
    transition: all 0.6s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    position: relative;
    border-radius: 4px 4px 0 0;
}

.iai-bar:hover {
    filter: brightness(1.2);
    cursor: pointer;
}

.iai-bar::after {
    content: attr(data-score);
    position: absolute;
    top: -25px;
    left: 50%;
    transform: translateX(-50%);
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--gold);
    opacity: 0;
    transition: opacity 0.3s;
}

.iai-bar:hover::after {
    opacity: 1;
}

.iai-label {
    margin-top: 15px;
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--gray-medium);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.chart-info {
    margin-top: 3rem;
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
}

.stat-highlight {
    font-family: var(--font-heading);
    font-size: 4rem;
    line-height: 1;
}

.stat-label {
    text-transform: uppercase;
    font-size: 0.75rem;
    letter-spacing: 0.1em;
    color: var(--gold);
}

.tag {
    color: var(--deep-blue);
    font-weight: 700;
    letter-spacing: 1px;
    font-size: 0.8rem;
    margin-bottom: 1rem;
    display: block;
}

#libro h2 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.book-subtitle {
    font-style: italic;
    color: var(--gray-dark);
    margin-bottom: 2rem;
    font-size: 1.1rem;
}

.book-description {
    margin-bottom: 2rem;
}

.feature-list {
    display: flex;
    gap: 2rem;
    margin-bottom: 2.5rem;
}

.feature-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 500;
}

/* Book Section Improvements */
#libro {
    background-color: var(--gray-light);
}

#portal {
    background-color: var(--deep-brown);
    text-align: center;
}

.portal-tag {
    color: var(--gold);
    letter-spacing: 2px;
    font-size: 0.8rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    display: block;
}

#portal h2 {
    color: var(--white);
    font-size: 2.5rem;
    margin-bottom: 1.5rem;
}

.portal-desc {
    max-width: 700px;
    margin: 0 auto 2.5rem;
    color: rgba(255,255,255,0.9);
}

.btn-white {
    background-color: var(--white);
    color: var(--deep-brown);
}

.btn-white:hover {
    background-color: #f0f0f0;
}

.portal-note {
    display: block;
    margin-top: 1rem;
    font-size: 0.85rem;
    color: rgba(255,255,255,0.6);
}

/* Blog Section */
#blog {
    background-color: var(--white);
}

.blog-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 3rem;
    margin: 5rem 0;
}

.blog-card {
    border: none;
    padding: 0;
    transition: transform 0.3s;
}

.blog-card:hover {
    transform: translateY(-10px);
}

.card-tag {
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--gold-dark);
    margin-bottom: 1.5rem;
    display: block;
    letter-spacing: 0.1em;
}

.blog-card h3 {
    font-family: var(--font-heading);
    font-size: 1.8rem;
    margin-bottom: 1.5rem;
    line-height: 1.2;
}

.blog-card p {
    font-size: 1rem;
    color: var(--gray-medium);
    margin-bottom: 2rem;
}

.read-more {
    font-weight: 700;
    text-transform: uppercase;
    font-size: 0.8rem;
    letter-spacing: 0.05em;
    color: var(--black);
    border-bottom: 2px solid var(--gold);
    padding-bottom: 5px;
}

.blog-btn-container {
    text-align: center;
}

/* Contact Section */
#contacto {
    background-color: var(--gray-light);
    padding: 0;
}

.split-contact {
    display: grid;
    grid-template-columns: 1fr 1fr;
    min-height: 800px;
}

.contact-info-panel {
    padding: 100px 80px;
    background-color: var(--cream);
}

.contact-form-panel {
    padding: 100px 80px;
    background-color: var(--black);
    color: var(--white);
}

.contact-form-panel h2 {
    color: var(--white);
    margin-bottom: 3rem;
}

.form-group label {
    color: var(--gold);
    text-transform: uppercase;
    font-size: 0.7rem;
    letter-spacing: 0.15em;
    font-weight: 700;
}

.form-group input, 
.form-group select, 
.form-group textarea {
    background: transparent;
    border: none;
    border-bottom: 1px solid rgba(255,255,255,0.2);
    border-radius: 0;
    padding: 15px 0;
    color: var(--white);
}

.form-group input:focus, 
.form-group select:focus, 
.form-group textarea:focus {
    border-color: var(--gold);
}

.contact-info-panel h2 {
    font-size: 3.5rem;
    margin-bottom: 2rem;
}

.info-item {
    margin-bottom: 3rem;
}

.info-label {
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--gray-medium);
    margin-bottom: 0.5rem;
    display: block;
}

.info-value {
    font-family: var(--font-heading);
    font-size: 1.5rem;
}

/* Footer */
footer {
    background-color: var(--black);
    color: var(--white);
    padding: 80px 0;
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 2fr;
    gap: 4rem;
}

.footer-logo {
    font-weight: 700;
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
    display: block;
}

.footer-links h4 {
    margin-bottom: 1.5rem;
    font-size: 0.9rem;
    letter-spacing: 1px;
    color: rgba(255,255,255,0.5);
}

.footer-links ul {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.8rem;
}

.footer-links a:hover {
    color: var(--light-blue);
}

.footer-copy {
    text-align: right;
    color: rgba(255,255,255,0.6);
    font-size: 0.9rem;
}

/* Responsive */
@media (max-width: 968px) {
    .hero-content {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 3rem;
    }
    
    .hero h1 {
        font-size: 3rem;
    }
    
    .hero-image-wrapper {
        margin-top: 2rem;
    }

    .hero-quote {
        margin-top: -30px;
        margin-left: 0;
        padding: 1.5rem;
    }

    .book-layout {
        grid-template-columns: 1fr;
        gap: 4rem;
    }

    .book-cover {
        position: relative;
        top: 0;
    }

    .metrics-grid {
        grid-template-columns: 1fr;
        gap: 3rem;
    }

    .split-contact {
        grid-template-columns: 1fr;
    }

    .contact-info-panel, .contact-form-panel {
        padding: 60px 2rem;
    }

    .analysis-header h2 {
        font-size: 2.2rem;
    }

    .stat-highlight {
        font-size: 3rem;
    }

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

/* Animations */
.fade-in {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.8s ease-out, transform 0.8s ease-out;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Dashboard & Data Styles (Portal IAI) */
.dashboard-card {
    background: var(--white);
    padding: 2.5rem;
    border: 1px solid var(--gray-light);
    transition: box-shadow 0.3s;
}

.dashboard-card:hover {
    box-shadow: 0 10px 30px rgba(0,0,0,0.05);
}

.card-metric {
    font-family: var(--font-heading);
    font-size: 3rem;
    color: var(--black);
    margin: 1rem 0;
}

.data-table {
    width: 100%;
    border-collapse: collapse;
    margin: 2rem 0;
}

.data-table th {
    text-align: left;
    padding: 15px;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--gray-medium);
    border-bottom: 1px solid var(--gray-light);
}

.data-table td {
    padding: 15px;
    border-bottom: 1px solid var(--gray-light);
}

.filter-select {
    appearance: none;
    background: var(--white);
    border: 1px solid var(--gray-light);
    padding: 10px 40px 10px 15px;
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='24' height='24' viewBox='0 0 24 24' fill='none' stroke='currentColor' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 10px center;
    background-size: 15px;
}