:root {
    --bg-main: #09090b;
    --bg-card: #121214;
    --accent-blue: #38bdf8;
    --text-main: #fafafa;
    --text-muted: #9ca3af;
    --border-color: #27272a;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

body {
    background-color: var(--bg-main);
    color: var(--text-main);
    line-height: 1.5;
    overflow-x: hidden;
}

main,
footer,
#sobre-mi,
.section,
.contact-section {
    width: min(1200px, calc(100% - 2rem));
    margin: 0 auto;
}

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

::selection {
    background-color: var(--accent-blue);
    color: var(--bg-main);
}

.text-blue { color: var(--accent-blue); }
.tagline {
    color: var(--accent-blue);
    font-family: monospace;
    font-size: 0.875rem;
    margin-bottom: 0.5rem;
}

.section-label {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}
.section-label::before {
    color: var(--accent-blue);
    content: '//';
}

.section-heading {
    position: relative;
    display: inline-block;
    margin-bottom: 2rem;
    padding-left: 1rem;
    border-left: 3px solid var(--accent-blue);
    font-family: "Bahnschrift", "Trebuchet MS", sans-serif;
    font-size: clamp(1.45rem, 2.7vw, 2.1rem);
    font-weight: 800;
    line-height: 1.1;
}
.section-heading::after {
    display: block;
    width: 3.5rem;
    height: 3px;
    margin-top: 0.85rem;
    background: var(--accent-blue);
    content: '';
}

.description {
    color: var(--text-muted);
    font-size: 1.125rem;
    margin-bottom: 1.5rem;
}
.mb-large { margin-bottom: 3rem; }

.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    border-radius: 9999px;
    font-weight: bold;
    font-size: 0.875rem;
    cursor: pointer;
    transition: opacity 0.2s, border-color 0.2s, color 0.2s;
    text-align: center;
    border: none;
}

.btn-primary {
    background-color: var(--accent-blue);
    color: var(--bg-main);
}
.btn-primary:hover { opacity: 0.9; }

.btn-outline {
    background-color: transparent;
    color: var(--text-main);
    border: 1px solid var(--text-muted);
}
.btn-outline:hover {
    border-color: var(--accent-blue);
    color: var(--accent-blue);
}

.full-width {
    width: 100%;
    border-radius: 0.5rem;
    padding: 1rem;
    font-size: 1rem;
}

.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.2rem 2rem;
    position: sticky;
    top: 0;
    z-index: 100;
    background-color: rgba(9, 9, 11, 0.95);
    backdrop-filter: blur(1px);
    -webkit-backdrop-filter: blur(1px);
    border-bottom: 1px solid var(--border-color);
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.65rem;
    font-weight: bold;
    font-size: 1.25rem;
    color: var(--accent-blue);
}

.logo-image {
    display: block;
    width: 58px;
    height: 58px;
    overflow: hidden;
    border-radius: 0.5rem;
    background: transparent;
}

.logo-image img {
    display: block;
    width: 100%;
    height: 100%;
    object-fit: contain;
    object-position: center;
}

.logo span { color: var(--text-main); }
.nav-links {
    display: flex;
    gap: 2rem;
    color: var(--text-muted);
    font-size: 0.875rem;
    font-weight: 500;
}
.nav-links a:hover { color: var(--text-main); }
.menu-toggle { display: none; }

.hero {
    position: relative;
    isolation: isolate;
    display: grid;
    grid-template-columns: 1fr;
    gap: 3rem;
    min-height: 620px;
    padding: 6rem max(2rem, calc((100vw - 1280px) / 2));
    max-width: none;
    margin: 0 auto;
    align-items: center;
    background: url("banner-computacion.jpg") center / cover no-repeat;
}

.hero::before {
    position: absolute;
    inset: 0;
    z-index: -1;
    background: rgba(9, 9, 11, 0.78);
    content: '';
}

.hero-content,
.code-block { position: relative; }

.hero .code-block {
    background-color: rgba(18, 18, 20, 0.9);
    backdrop-filter: blur(4px);
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.code-block {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    padding: 1.5rem;
    border-radius: 0.75rem;
    font-family: monospace;
    font-size: 0.875rem;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
}

.window-controls {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
}

.dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
}
.dot.red { background-color: #ef4444; }
.dot.yellow { background-color: #eab308; }
.dot.blue { background-color: #2563eb; }
.indent { margin-left: 1.5rem; }
.keyword { color: #60a5fa; }
.variable { color: #fef08a; }
.string { color: #7dd3fc; }

.section {
    padding: 5rem 0;
}

.grid-3,
.grid-2 {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1.5rem;
}

.grid-2 {
    gap: 3rem;
    align-items: center;
}

.about-content {
    max-width: 680px;
    width: 100%;
    margin: 0 auto;
}

#sobre-mi {
    display: flex;
    justify-content: center;
}

#sobre-mi .section-heading {
    max-width: 100%;
}

.contact-section {
    max-width: 900px;
}

.card {
    position: relative;
    overflow: hidden;
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    padding: 2rem;
    border-radius: 1rem;
    transition: transform 0.35s ease, border-color 0.35s ease, box-shadow 0.35s ease;
}

.card::before {
    position: absolute;
    top: 0;
    left: -100%;
    width: 70%;
    height: 2px;
    background: var(--accent-blue);
    content: '';
    transition: left 0.45s ease;
}

.card:hover {
    border-color: var(--accent-blue);
    box-shadow: 0 18px 35px rgba(52, 211, 153, 0.12);
    transform: translateY(-8px);
}
.card:hover::before { left: 100%; }

.card h3 {
    font-size: 1.25rem;
    margin-bottom: 1rem;
    transition: color 0.3s ease, transform 0.3s ease;
}
.card:hover h3 {
    color: var(--accent-blue);
    transform: translateX(4px);
}
.card p { color: var(--text-muted); }

.service-features {
    display: grid;
    gap: 0.65rem;
    margin-top: 1.5rem;
    padding: 1.25rem 0 0 1.25rem;
    border-top: 1px solid var(--border-color);
    color: var(--text-muted);
    font-size: 0.9rem;
}
.service-features li::marker { color: var(--accent-blue); }

.skills {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.skill-tag {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    padding: 0.5rem 1rem;
    border-radius: 9999px;
    font-size: 0.875rem;
}

.contact-section { max-width: 768px; text-align: center; }

.contact-form {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    padding: 2rem;
    border-radius: 1rem;
    text-align: left;
}

.form-group { margin-bottom: 1.5rem; }
.form-group label {
    display: block;
    font-size: 0.875rem;
    font-weight: bold;
    margin-bottom: 0.5rem;
}
.form-group input,
.form-group textarea {
    width: 100%;
    background-color: transparent;
    border: 1px solid var(--border-color);
    padding: 0.75rem;
    border-radius: 0.5rem;
    color: var(--text-main);
    font-size: 1rem;
}
.form-group textarea {
    resize: vertical;
    min-height: 120px;
}
.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--accent-blue);
}

footer {
    border-top: 1px solid var(--border-color);
    padding: 2rem;
    text-align: center;
    color: var(--text-muted);
    font-size: 0.875rem;
}
footer a { display: block; margin-top: 0.5rem; }
footer a:hover { color: var(--accent-blue); }

.whatsapp-button {
    position: fixed;
    right: 1.5rem;
    bottom: 1.5rem;
    z-index: 150;
    display: grid;
    width: 3.75rem;
    height: 3.75rem;
    place-items: center;
    border-radius: 50%;
    background: #25d366;
    color: #fff;
    box-shadow: 0 12px 28px rgba(0, 0, 0, 0.35);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}
.whatsapp-button:hover {
    transform: translateY(-3px) scale(1.04);
    box-shadow: 0 16px 32px rgba(37, 211, 102, 0.3);
}
.whatsapp-button svg {
    width: 2rem;
    height: 2rem;
    fill: currentColor;
}

.reveal {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 0.7s ease, transform 0.7s ease;
}
.reveal.visible {
    opacity: 1;
    transform: translateY(0);
}
.reveal-delay { transition-delay: 0.15s; }
.reveal-delay-2 { transition-delay: 0.3s; }

.toast {
    position: fixed;
    right: 1.5rem;
    bottom: 1.5rem;
    z-index: 200;
    max-width: 320px;
    padding: 1rem 1.25rem;
    border: 1px solid var(--accent-blue);
    border-radius: 0.5rem;
    background: var(--bg-card);
    color: var(--text-main);
    box-shadow: 0 12px 30px rgba(0, 0, 0, 0.35);
    opacity: 0;
    transform: translateY(1rem);
    pointer-events: none;
    transition: opacity 0.25s ease, transform 0.25s ease;
}
.toast.show {
    opacity: 1;
    transform: translateY(0);
}

@media (min-width: 768px) {
    .hero { grid-template-columns: 1fr 1fr; }
    .grid-3 { grid-template-columns: repeat(3, 1fr); }
    .grid-2 { grid-template-columns: 1fr 1fr; }
    h1 { font-size: 4rem; }
}

@media (max-width: 767px) {
    .navbar {
        flex-wrap: wrap;
        padding: 1rem 1.25rem;
    }
    .logo { font-size: 1rem; }
    .logo-image { width: 48px; height: 48px; }
    .menu-toggle {
        display: flex;
        flex-direction: column;
        gap: 4px;
        padding: 0.5rem;
        border: 0;
        background: transparent;
        cursor: pointer;
    }
    .menu-toggle span {
        width: 22px;
        height: 2px;
        background: var(--text-main);
        transition: transform 0.2s, opacity 0.2s;
    }
    .nav-links {
        display: none;
        flex-direction: column;
        gap: 0;
        padding: 0.5rem 1.25rem 1rem;
        order: 4;
        flex-basis: 100%;
        background: var(--bg-main);
        border-bottom: 1px solid var(--border-color);
    }
    .nav-links.open { display: flex; }
    .nav-links a { padding: 0.75rem 0; }
    .navbar > .btn-primary { display: none; }
    .hero {
        min-height: 680px;
        padding: 4rem 1.25rem;
        background-position: 62% center;
    }
    h1 {
        font-size: 2.8rem;
        line-height: 1.1;
    }
    .section { padding: 4rem 0; }
    .whatsapp-button {
        right: 1rem;
        bottom: 1rem;
    }
}

@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        scroll-behavior: auto !important;
        transition-duration: 0.01ms !important;
        animation-duration: 0.01ms !important;
    }
    .reveal {
        opacity: 1;
        transform: none;
    }
}
/* Hero */
.hero {
    position: relative;
    isolation: isolate;
    display: grid;
    grid-template-columns: 1fr;
    gap: 3rem;
    min-height: 620px;
    padding: 6rem max(2rem, calc((100vw - 1280px) / 2));
    max-width: none;
    margin: 0 auto;
    align-items: center;
    background: url("banner-computacion.jpg") center / cover no-repeat;
}
.hero::before {
    position: absolute;
    inset: 0;
    z-index: -1;
    background: rgba(9, 9, 11, 0.78);
    content: '';
}
.hero-content, .code-block { position: relative; }
.hero .code-block {
    background-color: rgba(18, 18, 20, 0.9);
    backdrop-filter: blur(4px);
}
.hero-buttons { display: flex; gap: 1rem; flex-wrap: wrap; }

/* Código decorativo */
.code-block {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    padding: 1.5rem;
    border-radius: 0.75rem;
    font-family: monospace;
    font-size: 0.875rem;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
}
.window-controls { display: flex; gap: 0.5rem; margin-bottom: 1.5rem; }
.dot { width: 12px; height: 12px; border-radius: 50%; }
.dot.red { background-color: #ef4444; }
.dot.yellow { background-color: #eab308; }
.dot.blue { background-color: #2563eb; }
.indent { margin-left: 1.5rem; }
.keyword { color: #60a5fa; } /* Azul */
.variable { color: #fef08a; } /* Amarillo */
.string { color: #7dd3fc; }

/* Grillas */
.grid-3 { display: grid; grid-template-columns: 1fr; gap: 1.5rem; }
.grid-2 { display: grid; grid-template-columns: 1fr; gap: 3rem; }

/* Tarjetas de servicios */
.card {
    position: relative;
    overflow: hidden;
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    padding: 2rem;
    border-radius: 1rem;
    transition: transform 0.35s ease, border-color 0.35s ease, box-shadow 0.35s ease;
}
.card::before {
    position: absolute;
    top: 0;
    left: -100%;
    width: 70%;
    height: 2px;
    background: var(--accent-blue);
    content: '';
    transition: left 0.45s ease;
}
.card:hover {
    border-color: var(--accent-blue);
    box-shadow: 0 18px 35px rgba(52, 211, 153, 0.12);
    transform: translateY(-8px);
}
.card:hover::before { left: 100%; }
.card h3 { font-size: 1.25rem; margin-bottom: 1rem; transition: color 0.3s ease, transform 0.3s ease; }
.card:hover h3 { color: var(--accent-blue); transform: translateX(4px); }
.card p { color: var(--text-muted); }
.service-features {
    display: grid;
    gap: 0.65rem;
    margin-top: 1.5rem;
    padding: 1.25rem 0 0 1.25rem;
    border-top: 1px solid var(--border-color);
    color: var(--text-muted);
    font-size: 0.9rem;
}
.service-features li::marker { color: var(--accent-blue); }

/* Sobre mí / Skills */
.skills { display: flex; flex-wrap: wrap; gap: 0.75rem; }
.skill-tag {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    padding: 0.5rem 1rem;
    border-radius: 9999px;
    font-size: 0.875rem;
}

/* Contacto */
.contact-section { max-width: 768px; text-align: center; }
.contact-form {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    padding: 2rem;
    border-radius: 1rem;
    text-align: left;
}
.form-group { margin-bottom: 1.5rem; }
.form-group label { display: block; font-size: 0.875rem; font-weight: bold; margin-bottom: 0.5rem; }
.form-group input, .form-group textarea {
    width: 100%;
    background-color: transparent;
    border: 1px solid var(--border-color);
    padding: 0.75rem;
    border-radius: 0.5rem;
    color: var(--text-main);
    font-size: 1rem;
}
.form-group textarea { resize: vertical; min-height: 120px; }
.form-group input:focus, .form-group textarea:focus {
    outline: none;
    border-color: var(--accent-blue);
}

/* Footer */
footer {
    border-top: 1px solid var(--border-color);
    padding: 2rem;
    text-align: center;
    color: var(--text-muted);
    font-size: 0.875rem;
}
footer a { display: block; margin-top: 0.5rem; }
footer a:hover { color: var(--accent-blue); }

/* Interacciones */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity 0.7s ease, transform 0.7s ease; }
.reveal.visible { opacity: 1; transform: translateY(0); }
.reveal-delay { transition-delay: 0.15s; }
.reveal-delay-2 { transition-delay: 0.3s; }
.toast {
    position: fixed;
    right: 1.5rem;
    bottom: 1.5rem;
    z-index: 200;
    max-width: 320px;
    padding: 1rem 1.25rem;
    border: 1px solid var(--accent-blue);
    border-radius: 0.5rem;
    background: var(--bg-card);
    color: var(--text-main);
    box-shadow: 0 12px 30px rgba(0, 0, 0, 0.35);
    opacity: 0;
    transform: translateY(1rem);
    pointer-events: none;
    transition: opacity 0.25s ease, transform 0.25s ease;
}
.toast.show { opacity: 1; transform: translateY(0); }

/* Responsive */
@media (min-width: 768px) {
    .hero { grid-template-columns: 1fr 1fr; }
    .grid-3 { grid-template-columns: repeat(3, 1fr); }
    .grid-2 { grid-template-columns: 1fr 1fr; }
    h1 { font-size: 4rem; }
}

@media (max-width: 767px) {
    .navbar { flex-wrap: wrap; padding: 1rem 1.25rem; }
    .logo { font-size: 1rem; }
    .logo-image { width: 48px; height: 48px; }
    .menu-toggle {
        display: flex;
        flex-direction: column;
        gap: 4px;
        padding: 0.5rem;
        border: 0;
        background: transparent;
        cursor: pointer;
    }
    .menu-toggle span { width: 22px; height: 2px; background: var(--text-main); transition: transform 0.2s, opacity 0.2s; }
    .nav-links {
        display: none;
        flex-direction: column;
        gap: 0;
        padding: 0.5rem 1.25rem 1rem;
        order: 4;
        flex-basis: 100%;
        background: var(--bg-main);
        border-bottom: 1px solid var(--border-color);
    }
    .nav-links.open { display: flex; }
    .nav-links a { padding: 0.75rem 0; }
    .navbar > .btn-primary { display: none; }
    .hero { min-height: 680px; padding: 4rem 1.25rem; background-position: 62% center; }
    h1 { font-size: 2.8rem; line-height: 1.1; }
    .section { padding: 3.5rem 1.25rem; }
}

@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after { scroll-behavior: auto !important; transition-duration: 0.01ms !important; animation-duration: 0.01ms !important; }
    .reveal { opacity: 1; transform: none; }
}