:root {
    --primary: #2563eb;
    --primary-dark: #1d4ed8;
    --secondary: #0f172a;
    --bg-light: #f8fafc;
    --text-dark: #1e293b;
    --text-light: #64748b;
    --white: #ffffff;
    --transition: all 0.3s ease;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', sans-serif;
    color: var(--text-dark);
    background-color: var(--white);
    line-height: 1.6;
}

/* Navbar */
header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background-color: rgba(255, 255, 255, 0.95);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
    z-index: 1000;
    backdrop-filter: blur(5px);
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
    padding: 1.5rem 2rem;
}

.logo {
    display: flex;
    flex-direction: column;
    text-decoration: none;
    font-family: "San Francisco", -apple-system, BlinkMacSystemFont, sans-serif;
}

.logo-main {
    font-size: 1.6rem;
    font-weight: 700;
    color: var(--secondary);
    /* Color oscuro para el símbolo </> */
    display: flex;
    align-items: center;
    gap: 0.3rem;
    line-height: 1.1;
}

.logo-main span {
    color: var(--primary);
    /* Color azul vibrante para Codesoft */
}

.logo-tagline {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-light);
    /* Color gris sutil */
    letter-spacing: 0.5px;
    margin-top: 2px;
}

/* Estilos del botón de tema (ubicado en el navbar normal) */
.theme-btn {
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    transition: transform 0.3s ease;
    padding: 0;
    margin-left: 0.5rem; /* Pequeño espacio de separación con el botón Contacto */
}

.theme-btn:hover {
    transform: scale(1.1);
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-item a {
    text-decoration: none;
    color: var(--text-dark);
    font-weight: 500;
    transition: var(--transition);
}

.nav-item a:hover {
    color: var(--primary);
}

.cta-btn {
    background-color: var(--primary);
    color: var(--white) !important;
    padding: 0.6rem 1.2rem;
    border-radius: 6px;
    font-weight: 600;
}

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

.menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
}

.menu-toggle span {
    width: 25px;
    height: 3px;
    background-color: var(--secondary);
    border-radius: 2px;
    transition: var(--transition);
}

/* Hero Section */
.hero {
    padding: 10rem 2rem 6rem;
    background: radial-gradient(circle at 90% 10%, #eff6ff 0%, #ffffff 60%);
    text-align: center;
}

.hero-container {
    max-width: 800px;
    margin: 0 auto;
}

.hero h1 {
    font-size: 3rem;
    font-weight: 700;
    color: var(--secondary);
    line-height: 1.2;
    margin-bottom: 1.5rem;
}

.hero h1 span {
    color: var(--primary);
}

.hero p {
    font-size: 1.25rem;
    color: var(--text-light);
    margin-bottom: 2.5rem;
}

.hero-buttons {
    display: flex;
    justify-content: center;
    gap: 1rem;
}

.btn {
    display: inline-block;
    text-decoration: none;
    padding: 0.8rem 1.8rem;
    border-radius: 6px;
    font-weight: 600;
    transition: var(--transition);
}

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

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

.btn-secondary {
    background-color: transparent;
    color: var(--secondary);
    border: 2px solid var(--secondary);
}

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

/* Services Section */
.services {
    padding: 6rem 2rem;
    background-color: var(--bg-light);
}

.section-title {
    text-align: center;
    margin-bottom: 4rem;
}

.section-title h2 {
    font-size: 2.25rem;
    color: var(--secondary);
    margin-bottom: 1rem;
}

.section-title p {
    color: var(--text-light);
    font-size: 1.1rem;
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.service-card {
    background-color: var(--white);
    padding: 2.5rem;
    border-radius: 12px;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -1px rgba(0, 0, 0, 0.03);
    transition: var(--transition);
}

.service-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
}

.service-icon {
    width: 50px;
    height: 50px;
    background-color: #dbeafe;
    color: var(--primary);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: bold;
    margin-bottom: 1.5rem;
}

.service-card h3 {
    font-size: 1.35rem;
    color: var(--secondary);
    margin-bottom: 1rem;
}

.service-card p {
    color: var(--text-light);
}

/* About Section */
.about {
    padding: 6rem 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.about-content {
    display: flex;
    align-items: center;
    gap: 4rem;
}

.about-text {
    flex: 1;
}

.about-text h2 {
    font-size: 2.25rem;
    color: var(--secondary);
    margin-bottom: 1.5rem;
}

.about-text p {
    color: var(--text-light);
    margin-bottom: 1.5rem;
    font-size: 1.1rem;
}

.about-features {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
    margin-top: 2rem;
}

.feature-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 600;
    color: var(--secondary);
}

.feature-item span {
    color: var(--primary);
}

/* Contact Section */
.contact {
    padding: 6rem 2rem;
    background-color: var(--secondary);
    color: var(--white);
}

.contact-container {
    max-width: 600px;
    margin: 0 auto;
    text-align: center;
}

.contact h2 {
    font-size: 2.25rem;
    margin-bottom: 1rem;
}

.contact p {
    color: #94a3b8;
    margin-bottom: 3rem;
}

.contact-form {
    background-color: rgba(255, 255, 255, 0.05);
    padding: 2.5rem;
    border-radius: 12px;
    backdrop-filter: blur(5px);
    text-align: left;
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-size: 0.9rem;
    font-weight: 600;
    color: #cbd5e1;
}

.form-control {
    width: 100%;
    padding: 0.8rem 1rem;
    background-color: rgba(255, 255, 255, 0.9);
    border: 1px solid transparent;
    border-radius: 6px;
    font-family: inherit;
    font-size: 1rem;
    color: var(--secondary);
    transition: var(--transition);
}

.form-control:focus {
    outline: none;
    border-color: var(--primary);
    background-color: var(--white);
}

textarea.form-control {
    resize: vertical;
    min-height: 120px;
}

.submit-btn {
    width: 100%;
    background-color: var(--primary);
    color: var(--white);
    border: none;
    padding: 1rem;
    font-size: 1rem;
    font-weight: 600;
    border-radius: 6px;
    cursor: pointer;
    transition: var(--transition);
}

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

/* Footer */
footer {
    background-color: #0b111e;
    color: #64748b;
    padding: 2rem;
    text-align: center;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    font-size: 0.9rem;
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav-menu {
        display: none;
        flex-direction: column;
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background-color: var(--white);
        padding: 2rem;
        box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
        gap: 1.5rem;
        text-align: center;
    }

    .nav-menu.active {
        display: flex;
    }

    .menu-toggle {
        display: flex;
    }

    .hero h1 {
        font-size: 2.25rem;
    }

    .about-content {
        flex-direction: column;
        text-align: center;
    }

    .about-features {
        justify-content: center;
    }
}

body.dark-mode {
    /* Sobrescribimos las variables de color */
    --bg-light: #0f172a;
    --white: #1e293b;
    --text-dark: #f1f5f9;
    --text-light: #94a3b8;
    --secondary: #f8fafc;
    --primary: #3b82f6;
    --primary-dark: #60a5fa;
}

/* Ajustes específicos para componentes en modo oscuro */
body.dark-mode header {
    background-color: rgba(30, 41, 59, 0.95);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.5);
}

body.dark-mode .hero {
    background: radial-gradient(circle at 90% 10%, #0f172a 0%, #1e293b 60%);
}

body.dark-mode .service-icon {
    background-color: #0f172a;
}

/* --- SOLUCIÓN PARA LA SECCIÓN DE CONTACTO --- */
body.dark-mode .contact {
    background-color: #0b111e; /* Forzamos un fondo muy oscuro */
    color: var(--text-dark);
}

body.dark-mode .contact h2 {
    color: var(--secondary); /* Blanco puro en modo noche */
}

body.dark-mode .contact p {
    color: var(--text-light);
}

body.dark-mode .contact-form {
    background-color: rgba(15, 23, 42, 0.8); /* Ajusta el fondo de la caja del formulario */
}
/* ------------------------------------------- */

body.dark-mode .form-control {
    background-color: rgba(15, 23, 42, 0.9);
    color: var(--text-dark);
    border: 1px solid #334155;
}

body.dark-mode .form-control:focus {
    border-color: var(--primary);
}

body.dark-mode footer {
    background-color: #080c14; /* Un tono aún más oscuro para cerrar la página */
}