:root {
    --bg-color: #0f172a;
    --text-color: #f8fafc;
    --accent-color: #38bdf8;
    --secondary-bg: #1e293b;
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: 100px; 
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    margin: 0;  
}

header {
    padding: 1rem 10%;
    background: rgba(15, 23, 42, 0.9);
    position: fixed;
    width: 80%;
    z-index: 1000;
}

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

.logo { font-size: 1.5rem; font-weight: bold; }
.logo span { color: var(--accent-color); }

nav ul { list-style: none; display: flex; gap: 2rem; }
nav a { text-decoration: none; color: var(--text-color); font-weight: 500; transition: 0.3s; }
nav a:hover { color: var(--accent-color); }

#hero {
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
}

.hero-content {
    padding: 0 20px; 
    max-width: 800px; 
    margin: 0 auto;
}

h1 span { color: var(--accent-color); }

.btn {
    display: inline-block;
    padding: 0.8rem 2rem;
    background-color: var(--accent-color);
    color: var(--bg-color);
    text-decoration: none;
    border-radius: 5px;
    font-weight: bold;
    margin-top: 1rem;
}

#projects,#about, #stack { padding: 5rem 10%; }

.project-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.project-card {
    background: var(--secondary-bg);
    padding: 2rem;
    border-radius: 10px;
    border: 1px solid #334155;
    transition: 0.3s;
}

.project-card:hover { transform: translateY(-10px); border-color: var(--accent-color); }

#contact { padding: 5rem 10%; }


#contact .project-card {
    display: flex; 
    flex-direction: column;
    align-items: center; 
    justify-content: center;
    text-align: center; 
    gap: 1rem; 
}

#contact .project-card i {
    font-size: 2.5rem; 
    color: var(--accent-color); 
}

.cv-container {
    display: flex;
    justify-content: center; 
    margin-top: 25px;
}

.btn-cv {
    display: flex;          
    align-items: center;     
    justify-content: center; 
    gap: 12px;              
    padding: 12px 24px;
    border: 2px solid var(--accent-color);
    border-radius: 8px;
    color: var(--accent-color);
    text-decoration: none;
    font-weight: bold;
    transition: all 0.3s ease;
}

.btn-cv i {
    font-size: 1.2rem;     
    margin: 0;            
}

.btn-cv:hover {
    background-color: var(--accent-color);
    color: var(--bg-color);
    transform: translateY(-3px);
}

#stack-container {
    display: flex;
    flex-direction: row;
    flex-wrap: wrap;
    justify-content: center;
    gap: 30px;
    padding: 20px;
    max-width: 1200px;
    margin: 0 auto;
}

#github-metrics-box {
    flex: 1;
    min-width: 320px;
    display: flex;
    flex-direction: column;
    align-items: center;
}

#stats-images-wrapper {
    display: flex;
    flex-direction: column; 
    align-items: center;
    gap: 15px;
    width: 100%;
}

#stats-images-wrapper img {
    width: 100%; 
    max-width: 450px; 
    height: auto; 
    border-radius: 10px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.3);
}

@media (min-width: 1024px) {
    #stats-images-wrapper {
        flex-direction: row; 
        justify-content: center;
        flex-wrap: wrap;
    }

    #stats-images-wrapper img {
        width: auto;
        height: 160px;
    }
}

/* Botón de cambio de idioma */
.lang-btn {
    background-color: transparent;
    color: var(--text-color);
    border: 1px solid var(--text-color);
    padding: 0.3rem 0.8rem;
    border-radius: 4px;
    cursor: pointer;
    font-weight: bold;
    font-family: inherit;
    transition: all 0.3s ease;
    margin-left: 10px;
}

.lang-btn:hover {
    background-color: var(--accent-color);
    color: var(--bg-color);
    border-color: var(--accent-color);
}

/* Efecto de cursor parpadeante para el texto mecanografiado */
#typewriter-text::after {
    content: '|';
    color: var(--accent-color);
    animation: blink 1s infinite;
    margin-left: 2px;
}

@keyframes blink {
    0%, 100% { opacity: 1; }
    50% { opacity: 0; }
}

/* --- RESPONSIVIDAD PARA LA BARRA DE NAVEGACIÓN (MÓVILES) --- */
@media (max-width: 768px) {
    header {
        width: 100%;
        padding: 1rem 5%;
        box-sizing: border-box; 
    }
    
    nav {
        flex-direction: column; 
        gap: 15px;
    }

    nav ul {
        padding: 0; 
        margin: 0;
        gap: 1rem;
        flex-wrap: wrap;
        justify-content: center; 
    }

    .lang-btn {
        margin-left: 0; 
    }
}

#projects .project-card {
    display: flex;
    flex-direction: column;
}

.tech-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin: 15px 0 25px 0;
}

.tech-tag {
    background: rgba(56, 189, 248, 0.1);
    color: var(--accent-color);
    padding: 5px 12px;
    border-radius: 15px;
    font-size: 0.85rem;
    font-weight: 500;
    border: 1px solid rgba(56, 189, 248, 0.3);
}

.project-actions {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-top: auto; 
    width: 100%;
}

.btn-card {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 10px;
    width: 100%;
    padding: 12px;
    border-radius: 8px;
    text-decoration: none !important;
    font-weight: bold;
    font-size: 0.95rem;
    transition: 0.3s;
    box-sizing: border-box;
}

.btn-github {
    background-color: var(--secondary-bg);
    border: 2px solid #475569;
    color: #f8fafc !important;
}

.btn-github:hover {
    border-color: var(--accent-color);
    background-color: rgba(56, 189, 248, 0.1);
}

.btn-allure {
    background-color: rgba(16, 185, 129, 0.15); 
    border: 2px solid #10b981;
    color: #10b981 !important;
}

.btn-allure:hover {
    background-color: #10b981;
    color: var(--bg-color) !important;
}

#projects, #about, #stack { padding: 2.5rem 10%; }
#contact { padding: 2.5rem 10%; }

.roles-badge {
    background: rgba(56, 189, 248, 0.05); 
    border: 1px solid rgba(56, 189, 248, 0.2);
    color: var(--text-color);
    padding: 15px 25px;
    border-radius: 8px;
    margin-top: 25px;
    font-size: 1.05rem;
    display: inline-block;
}

.roles-badge strong {
    color: var(--accent-color);
}

.contact-link {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-decoration: none !important; 
    color: var(--text-color);
    width: 100%;
    height: 100%;
    gap: 15px; 
    transition: color 0.3s ease;
}

.contact-link:hover {
    color: var(--accent-color); 
}

.contact-link i {
    transition: transform 0.3s ease;
}

.contact-link:hover i {
    transform: scale(1.15);
}

/* --- CHATBOT WIDGET --- */
#chat-toggle {
    position: fixed;
    bottom: 20px;
    right: 20px;
    background-color: var(--accent-color);
    color: var(--bg-color);
    border: none;
    border-radius: 50%;
    width: 60px;
    height: 60px;
    font-size: 24px;
    cursor: pointer;
    box-shadow: 0 4px 10px rgba(0,0,0,0.3);
    z-index: 1000;
    transition: transform 0.3s ease;
}

#chat-toggle:hover {
    transform: scale(1.1);
}

#chat-widget {
    position: fixed;
    bottom: 90px;
    right: 20px;
    width: 320px;
    max-width: calc(100vw - 40px);
    background-color: var(--secondary-bg);
    border-radius: 12px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.5);
    display: none; /* Oculto por defecto */
    flex-direction: column;
    z-index: 1000;
    overflow: hidden;
    border: 1px solid #334155;
}

#chat-header {
    background-color: var(--accent-color);
    color: var(--bg-color);
    padding: 15px;
    font-weight: bold;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

#chat-header button {
    background: none;
    border: none;
    color: var(--bg-color);
    font-size: 18px;
    cursor: pointer;
}

#chat-body {
    padding: 15px;
    height: 250px;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.bot-msg {
    background-color: rgba(56, 189, 248, 0.1);
    color: var(--text-color);
    padding: 10px;
    border-radius: 10px 10px 10px 0;
    font-size: 0.9rem;
    align-self: flex-start;
    max-width: 85%;
    border: 1px solid rgba(56, 189, 248, 0.2);
}

.user-msg {
    background-color: var(--accent-color);
    color: var(--bg-color);
    padding: 10px;
    border-radius: 10px 10px 0 10px;
    font-size: 0.9rem;
    align-self: flex-end;
    max-width: 85%;
}

.chat-options {
    display: flex;
    flex-direction: column;
    gap: 5px;
    margin-top: 5px;
}

.chat-opt {
    background: transparent;
    color: var(--accent-color);
    border: 1px solid var(--accent-color);
    padding: 8px;
    border-radius: 5px;
    cursor: pointer;
    font-size: 0.85rem;
    transition: 0.3s;
}

.chat-opt:hover {
    background: var(--accent-color);
    color: var(--bg-color);
}