/* --- VARIABLES & GLOBAL STYLES --- */
:root {
    --primary-color: #6A1B9A; /* Morado tecnológico */
    --secondary-color: #00E676; /* Verde neón para acentos */
    --dark-bg: #121212;
    --light-bg: #F5F5F5;
    --dark-card: #1E1E1E;
    --light-card: #ffffff;
    --dark-text: #E0E0E0;
    --light-text: #333333;
    --font-primary: 'Poppins', sans-serif;
    --font-accent: 'Roboto Mono', monospace;
    --shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    --radius: 12px;
    --transition: all 0.3s ease-in-out;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-primary);
    margin: 0;
    padding-top: 80px;
    background-color: var(--light-bg);
    color: var(--light-text);
    transition: var(--transition);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body.dark-mode {
    background-color: var(--dark-bg);
    color: var(--dark-text);
}

/* --- HEADER --- */
.sticky-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 80px;
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(12px);
    box-shadow: 0 2px 15px rgba(0,0,0,0.05);
    z-index: 1000;
    transition: var(--transition);
}
.dark-mode .sticky-header {
    background: rgba(18, 18, 18, 0.8);
}
.header-container {
    max-width: 1300px;
    margin: 0 auto;
    padding: 0 2rem;
    height: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.logo-text {
    font-family: var(--font-accent);
    font-weight: 700;
    color: var(--primary-color);
    font-size: 1.8rem;
    text-decoration: none;
}
.dark-mode .logo-text { color: var(--secondary-color); }
.nav-links { display: flex; gap: 2.5rem; list-style: none; padding: 0; margin: 0; }
.nav-links a {
    color: var(--light-text);
    text-decoration: none;
    font-weight: 500;
    font-size: 1rem;
    position: relative;
    padding: 5px 0;
}
.dark-mode .nav-links a { color: var(--dark-text); }
.nav-links a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--primary-color);
    transition: var(--transition);
}
.dark-mode .nav-links a:hover::after { background-color: var(--secondary-color); }
.nav-links a:hover::after { width: 100%; }
.header-actions { display: flex; align-items: center; gap: 1rem; }
.toggle-theme {
    background: none;
    border: 1px solid #ddd;
    color: var(--light-text);
    width: 40px;
    height: 40px;
    border-radius: 50%;
    cursor: pointer;
    font-size: 1.2rem;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}
.dark-mode .toggle-theme { border-color: #444; color: var(--dark-text); }
.toggle-theme:hover { background-color: var(--primary-color); color: white; border-color: var(--primary-color); }
.dark-mode .toggle-theme:hover { background-color: var(--secondary-color); color: var(--dark-bg); border-color: var(--secondary-color); }
.toggle-theme .fa-sun { display: none; }
.dark-mode .toggle-theme .fa-moon { display: none; }
.dark-mode .toggle-theme .fa-sun { display: block; }
.menu-btn { display: none; }

/* --- GENERAL SECTIONS & TITLES --- */
main { max-width: 1200px; margin: 0 auto; padding: 5rem 2rem; }
.section-title {
    font-family: var(--font-accent);
    font-size: 2.8rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 4rem;
    position: relative;
}
.section-title::after {
    content: '';
    position: absolute;
    bottom: -15px;
    left: 50%;
    transform: translateX(-50%);
    width: 70px;
    height: 4px;
    background: var(--primary-color);
    border-radius: 2px;
}
.dark-mode .section-title::after { background-color: var(--secondary-color); }
.section-container { margin-bottom: 7rem; }

/* --- HERO SECTION --- */
.hero-section {
    display: flex;
    align-items: center;
    gap: 3rem;
    min-height: calc(90vh - 80px);
    margin-top: -5rem;
}
.hero-content { flex: 1.2; }
.hero-content h1 {
    font-family: var(--font-primary);
    font-size: 3.5rem;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 1.5rem;
}
.hero-content .highlight { color: var(--primary-color); }
.dark-mode .hero-content .highlight { color: var(--secondary-color); }
.hero-content p { font-size: 1.2rem; color: #555; margin-bottom: 2.5rem; line-height: 1.7; }
.dark-mode .hero-content p { color: #bbb; }
.cta-button {
    background: var(--primary-color);
    color: white;
    padding: 18px 40px;
    border-radius: var(--radius);
    text-decoration: none;
    font-weight: 700;
    font-size: 1.1rem;
    transition: var(--transition);
    box-shadow: 0 5px 20px rgba(106, 27, 154, 0.3);
    border: none;
    cursor: pointer;
}
.cta-button:hover { transform: translateY(-4px); box-shadow: 0 8px 25px rgba(106, 27, 154, 0.4); }
.hero-image { flex: 1; text-align: center; }
.hero-image img {
    max-width: 100%;
    border-radius: var(--radius);
}

/* --- SERVICES SECTION --- */
.servicios-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}
.servicio-card {
    background: var(--light-card);
    padding: 2.5rem;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    transition: var(--transition);
    border-top: 5px solid var(--primary-color);
    text-align: center;
}
.dark-mode .servicio-card { background: var(--dark-card); border-top-color: var(--secondary-color); }
.servicio-card:hover { transform: translateY(-10px); }
.servicio-icon { font-size: 3rem; color: var(--primary-color); margin-bottom: 1.5rem; }
.dark-mode .servicio-icon { color: var(--secondary-color); }
.servicio-card h3 {
    font-family: var(--font-primary);
    font-weight: 700;
    font-size: 1.4rem;
    margin-bottom: 0.5rem;
}
.servicio-card p { font-size: 1rem; color: #666; line-height: 1.6; }
.dark-mode .servicio-card p { color: #ccc; }

/* --- NUEVO: TECHNOLOGIES SECTION --- */
.tech-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    gap: 1.5rem;
    text-align: center;
}
.tech-item {
    background: var(--light-card);
    padding: 2rem 1rem;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    transition: var(--transition);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 1rem;
}
.dark-mode .tech-item {
    background: var(--dark-card);
}
.tech-item:hover {
    transform: translateY(-8px);
    color: var(--primary-color);
}
.dark-mode .tech-item:hover {
    color: var(--secondary-color);
}
.tech-item i {
    font-size: 3rem;
}
.tech-item span {
    font-weight: 500;
    font-size: 1rem;
}

/* --- PROJECTS SECTION --- */
.proyectos-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2rem;
}
.proyecto-card {
    background: var(--light-card);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    overflow: hidden;
    transition: var(--transition);
    display: flex;
    flex-direction: column;
}
.dark-mode .proyecto-card { background: var(--dark-card); }
.proyecto-card:hover { transform: translateY(-10px); }
.proyecto-imagen { position: relative; }
.proyecto-imagen img { width: 100%; height: 220px; object-fit: cover; display: block; }
.proyecto-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(106, 27, 154, 0.8);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: var(--transition);
}
.dark-mode .proyecto-overlay { background: rgba(0, 230, 118, 0.8); }
.proyecto-card:hover .proyecto-overlay { opacity: 1; }
.proyecto-link {
    color: white;
    text-decoration: none;
    font-weight: 700;
    font-size: 1.1rem;
    padding: 1rem 2rem;
    border: 2px solid white;
    border-radius: var(--radius);
}
.proyecto-contenido { padding: 1.5rem; flex-grow: 1; display: flex; flex-direction: column;}
.proyecto-contenido h3 { font-size: 1.3rem; margin-bottom: 0.75rem; font-family: var(--font-primary); }
.proyecto-contenido p { font-size: 0.95rem; color: #666; margin-bottom: 1.5rem; line-height: 1.6; }
.dark-mode .proyecto-contenido p { color: #ccc; }
.proyecto-tags { display: flex; flex-wrap: wrap; gap: 0.5rem; margin-bottom: 1.5rem; }
.proyecto-tags span {
    background: #eee;
    color: var(--primary-color);
    padding: 0.3rem 0.8rem;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 500;
}
.dark-mode .proyecto-tags span { background: #333; color: var(--secondary-color); }

/* --- NUEVO: BLOG SECTION --- */
.blog-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2rem;
}
.blog-card {
    background: var(--light-card);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    overflow: hidden;
    transition: var(--transition);
    display: flex;
    flex-direction: column;
}
.dark-mode .blog-card {
    background: var(--dark-card);
}
.blog-card:hover {
    transform: translateY(-10px);
}
.blog-image {
    width: 100%;
    height: 200px;
    object-fit: cover;
}
.blog-content {
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    flex-grow: 1;
}
.blog-meta {
    font-size: 0.85rem;
    color: #888;
    margin-bottom: 0.75rem;
}
.dark-mode .blog-meta {
    color: #aaa;
}
.blog-meta span {
    font-weight: 500;
    color: var(--primary-color);
}
.dark-mode .blog-meta span {
    color: var(--secondary-color);
}
.blog-title {
    font-size: 1.3rem;
    margin: 0 0 0.75rem 0;
}
.blog-excerpt {
    font-size: 0.95rem;
    color: #666;
    line-height: 1.6;
    flex-grow: 1;
    margin-bottom: 1.5rem;
}
.dark-mode .blog-excerpt {
    color: #ccc;
}
.blog-link {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 700;
    align-self: flex-start;
    transition: var(--transition);
}
.dark-mode .blog-link {
    color: var(--secondary-color);
}
.blog-link:hover {
    opacity: 0.7;
}


/* --- ABOUT ME SECTION --- */
.about-section {
    display: flex;
    align-items: center;
    gap: 3rem;
    background: var(--light-card);
    padding: 3rem;
    border-radius: var(--radius);
}
.dark-mode .about-section { background: var(--dark-card); }
.about-image { flex: 1; }
.about-image img { width: 100%; border-radius: 50%; box-shadow: var(--shadow); }
.about-content { flex: 1.5; }
.about-content .section-title { text-align: left; }
.about-content .section-title::after { left: 0; transform: translateX(0); }
.about-content p { margin-bottom: 1.5rem; line-height: 1.8; font-size: 1.1rem; }
.feature-list { list-style: none; padding: 0; margin-bottom: 2rem; }
.feature-list li { display: flex; align-items: flex-start; gap: 1rem; margin-bottom: 1rem; font-size: 1rem; }
.feature-list i { color: var(--secondary-color); font-size: 1.2rem; margin-top: 4px; }
.cta-button-secondary {
    background: transparent;
    color: var(--primary-color);
    padding: 16px 35px;
    border-radius: var(--radius);
    text-decoration: none;
    font-weight: 700;
    transition: var(--transition);
    border: 2px solid var(--primary-color);
}
.dark-mode .cta-button-secondary { color: var(--secondary-color); border-color: var(--secondary-color); }
.cta-button-secondary:hover { background: var(--primary-color); color: #fff; }
.dark-mode .cta-button-secondary:hover { background: var(--secondary-color); color: var(--dark-bg); }

/* --- CONTACT SECTION --- */
.contact-section {
    display: flex;
    gap: 3rem;
    background: var(--light-bg);
    padding: 3rem;
    border-radius: var(--radius);
}
.dark-mode .contact-section { background: var(--dark-card); }
.contact-content { flex: 1; }
.contact-content .section-title { text-align: left; }
.contact-content .section-title::after { left: 0; transform: translateX(0); }
.contact-info { margin-top: 2rem; }
.contact-info p { display: flex; align-items: center; gap: 1rem; margin-bottom: 1.2rem; font-size: 1.1rem; }
.contact-info i { color: var(--primary-color); font-size: 1.2rem; width: 25px; text-align: center; }
.dark-mode .contact-info i { color: var(--secondary-color); }
.social-links-contact { margin-top: 2rem; display: flex; gap: 1.5rem; }
.social-links-contact a {
    color: var(--light-text);
    font-size: 1.8rem;
    transition: var(--transition);
}
.dark-mode .social-links-contact a { color: var(--dark-text); }
.social-links-contact a:hover { color: var(--primary-color); transform: translateY(-3px); }
.dark-mode .social-links-contact a:hover { color: var(--secondary-color); }
.contact-form-container { flex: 1.2; }
.contact-form input, .contact-form textarea {
    width: 100%;
    padding: 1rem;
    margin-bottom: 1rem;
    border-radius: var(--radius);
    border: 1px solid #ccc;
    background: var(--light-card);
    font-family: var(--font-primary);
    font-size: 1rem;
    color: var(--light-text);
    box-sizing: border-box;
}
.dark-mode .contact-form input, .dark-mode .contact-form textarea {
    background: #2c2c2c;
    border-color: #444;
    color: var(--dark-text);
}
.contact-form input:focus, .contact-form textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(106, 27, 154, 0.2);
}
.dark-mode .contact-form input:focus, .dark-mode .contact-form textarea:focus {
    border-color: var(--secondary-color);
    box-shadow: 0 0 0 3px rgba(0, 230, 118, 0.2);
}
#form-status {
    margin-top: 1rem;
    padding: 1rem;
    border-radius: var(--radius);
    text-align: center;
    font-weight: 500;
}
.form-success {
    background-color: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
}
.form-error {
    background-color: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
}


/* --- GEMINI & DYNAMIC FEATURES --- */
.gemini-button {
    background-color: transparent;
    color: var(--primary-color);
    border: 1px solid var(--primary-color);
    padding: 0.5rem 1rem;
    border-radius: 20px;
    cursor: pointer;
    transition: var(--transition);
    font-weight: 500;
    margin-top: auto;
    align-self: flex-start;
}
.dark-mode .gemini-button {
    color: var(--secondary-color);
    border-color: var(--secondary-color);
}
.gemini-button:hover {
    background-color: var(--primary-color);
    color: white;
}
.dark-mode .gemini-button:hover {
    background-color: var(--secondary-color);
    color: var(--dark-bg);
}
.gemini-result {
    margin-top: 1rem;
    padding: 1rem;
    background-color: #f0e6f6;
    border-radius: var(--radius);
    font-size: 0.9rem;
    line-height: 1.6;
    border-left: 4px solid var(--primary-color);
}
.dark-mode .gemini-result {
    background-color: #2a2a2a;
    border-left-color: var(--secondary-color);
}
.gemini-result p { margin: 0 0 0.5rem 0; }
.gemini-result ul { padding-left: 1.2rem; margin: 0; }

.textarea-container {
    position: relative;
}
.gemini-button-textarea {
    position: absolute;
    bottom: 25px;
    right: 10px;
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--primary-color);
    transition: transform 0.2s ease;
}
.dark-mode .gemini-button-textarea {
    color: var(--secondary-color);
}
.gemini-button-textarea:hover {
    transform: scale(1.2);
}

.loading-spinner {
    border: 4px solid #f3f3f3;
    border-top: 4px solid var(--primary-color);
    border-radius: 50%;
    width: 30px;
    height: 30px;
    animation: spin 1s linear infinite;
    margin: 1rem auto;
}
.dark-mode .loading-spinner {
    border-top-color: var(--secondary-color);
}
@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}


/* --- FOOTER --- */
footer {
    background: #1E1E1E;
    color: #aaa;
    padding: 2rem;
    text-align: center;
}
.dark-mode footer { background: #000; }

/* --- FLOATING BUTTONS & CHAT --- */
.floating-buttons-container {
    position: fixed;
    bottom: 40px;
    right: 40px;
    z-index: 100;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}
.whatsapp-float, .gemini-chat-float {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    color: #FFF;
    text-align: center;
    font-size: 30px;
    box-shadow: 2px 2px 10px rgba(0,0,0,0.2);
    display: flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    transition: var(--transition);
    border: none;
    cursor: pointer;
}
.whatsapp-float {
    background-color: #25D366;
}
.whatsapp-float:hover {
    transform: translateY(-5px) scale(1.1);
    background-color: #128C7E;
}
.gemini-chat-float {
    background: var(--primary-color);
}
.gemini-chat-float:hover {
    transform: translateY(-5px) scale(1.1);
    background: #581c7c;
}

.gemini-chat-container {
    position: fixed;
    bottom: 120px;
    right: 40px;
    width: 350px;
    max-width: 90vw;
    height: 500px;
    max-height: 70vh;
    background: var(--light-card);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    z-index: 99;
    transform: translateY(20px) scale(0.95);
    opacity: 0;
    visibility: hidden;
    transition: all 0.2s ease-in-out;
}
.dark-mode .gemini-chat-container {
    background: var(--dark-card);
}
.gemini-chat-container.visible {
    transform: translateY(0) scale(1);
    opacity: 1;
    visibility: visible;
}
.gemini-chat-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.75rem 1.25rem;
    background: var(--primary-color);
    color: white;
}
.gemini-chat-header h3 {
    margin: 0;
    font-size: 1.1rem;
}
#close-chat-btn {
    background: none;
    border: none;
    color: white;
    font-size: 1.8rem;
    cursor: pointer;
    line-height: 1;
}
.gemini-chat-messages {
    flex-grow: 1;
    padding: 1rem;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}
.chat-message {
    padding: 0.75rem 1rem;
    border-radius: 18px;
    max-width: 80%;
    line-height: 1.5;
}
.user-message {
    background: var(--primary-color);
    color: white;
    border-bottom-right-radius: 4px;
    align-self: flex-end;
}
.bot-message {
    background: #eee;
    color: var(--light-text);
    border-bottom-left-radius: 4px;
    align-self: flex-start;
}
.dark-mode .bot-message {
    background: #333;
    color: var(--dark-text);
}
.bot-typing {
    align-self: flex-start;
}
.bot-typing span {
    display: inline-block;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: #aaa;
    margin: 0 2px;
    animation: typing-bounce 1s infinite;
}
.bot-typing span:nth-child(2) { animation-delay: 0.2s; }
.bot-typing span:nth-child(3) { animation-delay: 0.4s; }
@keyframes typing-bounce {
    0%, 60%, 100% { transform: translateY(0); }
    30% { transform: translateY(-5px); }
}

.gemini-chat-input-area {
    display: flex;
    padding: 0.75rem;
    border-top: 1px solid #eee;
}
.dark-mode .gemini-chat-input-area {
    border-top-color: #333;
}
#gemini-chat-input {
    flex-grow: 1;
    border: none;
    padding: 0.75rem;
    border-radius: 20px;
    background: #f0f0f0;
    font-family: var(--font-primary);
}
.dark-mode #gemini-chat-input {
    background: #333;
    color: var(--dark-text);
}
#gemini-chat-input:focus {
    outline: none;
}
#gemini-chat-send-btn {
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: 50%;
    width: 45px;
    height: 45px;
    margin-left: 0.5rem;
    cursor: pointer;
    font-size: 1.2rem;
    transition: var(--transition);
}
#gemini-chat-send-btn:hover {
    opacity: 0.8;
}

/* --- RESPONSIVE DESIGN --- */
@media (max-width: 992px) {
    .hero-section, .about-section, .contact-section { flex-direction: column; text-align: center; }
    .hero-content h1 { font-size: 2.8rem; }
    .about-content .section-title, .contact-content .section-title { text-align: center; }
    .about-content .section-title::after, .contact-content .section-title::after { left: 50%; transform: translateX(-50%); }
    .about-image img { max-width: 250px; margin: 0 auto; }
}

@media (max-width: 768px) {
    body { padding-top: 70px; }
    .sticky-header { height: 70px; }
    .nav-links {
        position: fixed;
        top: 70px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 70px);
        background: var(--light-bg);
        flex-direction: column;
        justify-content: center;
        align-items: center;
        gap: 2.5rem;
        transition: var(--transition);
    }
    .dark-mode .nav-links { background: var(--dark-bg); }
    .nav-links.active { left: 0; }
    .menu-btn {
        display: block;
        background: none;
        border: none;
        color: var(--light-text);
        font-size: 1.5rem;
        cursor: pointer;
        z-index: 1001;
    }
    .dark-mode .menu-btn { color: var(--dark-text); }
    main { padding: 3rem 1rem; }
    .hero-content h1 { font-size: 2.5rem; }
    .section-title { font-size: 2.2rem; }
    .floating-buttons-container { bottom: 20px; right: 20px; }
    .whatsapp-float, .gemini-chat-float { width: 50px; height: 50px; font-size: 24px; }
    .gemini-chat-container { bottom: 90px; right: 20px; }
    .contact-content { padding: 2rem; }
    .nav-links { gap: 2rem; } /* Reduce gap for smaller screens */
    .tech-grid { grid-template-columns: repeat(auto-fill, minmax(120px, 1fr)); }
}