:root {
    --bg: #071a2a;
    --surface: #152a3f;
    --surface-strong: #2d3f54;
    --text: #f7fdfd;
    --muted: #c1d5df;
    --accent: #1dbd8e;
    --accent-strong: #00d4c6;
    --accent-alt: #ffb72b;
    --danger: #f24f4f;
    --purple: #9151b8;
    --button-glow: rgba(29, 189, 142, 0.35);
    --shadow: 0 20px 60px rgba(0, 0, 0, 0.18);
}

* {
    box-sizing: border-box;
}

html, body {
    margin: 0;
    min-height: 100%;
    scroll-behavior: smooth;
    background: radial-gradient(circle at top, rgba(29, 189, 142, 0.18), transparent 30%),
                linear-gradient(180deg, #020b13 0%, #071a2a 100%);
    color: var(--text);
    font-family: Inter, system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

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

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

body.matrix-mode {
    background: #000;
    color: #b6ffb0;
}
/* Desktop (default) navigation - centered and sticky */
.navbar {
    position: sticky;
    top: 0;
    z-index: 999;
    background: rgba(5, 16, 24, 0.95);
    backdrop-filter: blur(16px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 0;
}

.nav-list {
    list-style: none;
    display: flex;
    justify-content: center;
    gap: 28px;
    padding: 18px 36px;
    margin: 0;
    align-items: center;
}

.nav-toggle { display: none; }

.nav-toggle .hamburger {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--text);
    position: relative;
}

.nav-toggle .hamburger::before,
.nav-toggle .hamburger::after {
    content: '';
    position: absolute;
    left: 0;
    width: 24px;
    height: 2px;
    background: var(--text);
}

.nav-toggle .hamburger::before { top: -7px; }
.nav-toggle .hamburger::after { top: 7px; }

.nav-list a {
    color: var(--muted);
    font-weight: 600;
    letter-spacing: 0.02em;
    transition: color 180ms ease;
}

.nav-list a:hover,
.nav-list a:focus,
.nav-list a.active {
    color: var(--accent);
}

/* Mobile behavior */
@media (max-width: 900px) {
    .nav-toggle { display: inline-flex; }
    .navbar {
        position: fixed;
        top: 12px;
        left: 12px;
        z-index: 1200;
        background: transparent;
        padding: 0;
    }

    .nav-list {
        list-style: none;
        display: flex;
        gap: 8px;
        padding: 0;
        margin: 0;
        flex-direction: column;
        position: fixed;
        top: calc(12px + 44px);
        left: 12px;
        background: rgba(7,26,42,0.98);
        padding: 10px 14px;
        border-radius: 10px;
        box-shadow: 0 10px 30px rgba(0,0,0,0.6);
        transform: translateY(-8px);
        opacity: 0;
        pointer-events: none;
        transition: opacity 180ms ease, transform 180ms ease;
    }

    .nav-list.open, .nav-list:not([hidden]) {
        opacity: 1;
        pointer-events: auto;
        transform: translateY(0);
    }

    .nav-toggle {
        display: inline-flex;
        background: rgba(5,16,24,0.85);
        border: 1px solid rgba(255,255,255,0.06);
        padding: 10px;
        border-radius: 8px;
        cursor: pointer;
    }

    .nav-toggle .hamburger {
        display: block;
        width: 20px;
        height: 2px;
        background: var(--text);
        position: relative;
    }

    .nav-toggle .hamburger::before,
    .nav-toggle .hamburger::after {
        content: '';
        position: absolute;
        left: 0;
        width: 20px;
        height: 2px;
        background: var(--text);
    }

    .nav-toggle .hamburger::before { top: -6px; }
    .nav-toggle .hamburger::after { top: 6px; }

    .nav-list a {
        color: var(--muted);
        font-weight: 600;
        letter-spacing: 0.02em;
        transition: color 180ms ease;
        padding: 8px 6px;
        display: block;
    }

    .nav-list a:hover,
    .nav-list a:focus,
    .nav-list a.active {
        color: var(--accent);
    }
}

.skip-link {
    position: absolute;
    left: 16px;
    top: 16px;
    transform: translateY(-120%);
    background: rgba(0, 0, 0, 0.92);
    color: var(--text);
    padding: 12px 18px;
    border-radius: 12px;
    z-index: 1000;
    transition: transform 180ms ease;
}

.skip-link:focus-visible {
    transform: translateY(0);
}

.hero {
    min-height: 90vh;
    padding: 80px 24px 60px;
    display: grid;
    align-items: center;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at top right, rgba(0, 212, 198, 0.12), transparent 22%),
                radial-gradient(circle at left center, rgba(255, 183, 43, 0.16), transparent 18%);
    pointer-events: none;
}

.hero-grid {
    position: relative;
    display: grid;
    gap: 48px;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    align-items: start;
}

.hero-copy {
    max-width: 640px;
}

.eyebrow {
    color: var(--accent-alt);
    text-transform: uppercase;
    font-size: 0.85rem;
    letter-spacing: 0.25em;
    margin-bottom: 16px;
}

.hero h1 {
    margin: 0;
    font-size: clamp(3rem, 6vw, 5rem);
    line-height: 0.95;
}

.hero p {
    font-size: 1.05rem;
    line-height: 1.8;
    max-width: 700px;
    margin: 24px 0 0;
    color: var(--muted);
}

.hero-actions {
    display: flex;
    align-items: center;
    gap: 20px;
    flex-wrap: wrap;
    margin-top: 40px;
}

.matrix-toggle {
    display: inline-flex;
    width: auto;
    margin: 40px auto 0;
    padding: 1rem 1.6rem;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    border: none;
    cursor: pointer;
    padding: 1rem 1.8rem;
    min-width: 170px;
    border-radius: 999px;
    transition: transform 180ms ease, box-shadow 180ms ease, background 180ms ease;
    text-decoration: none;
    font-weight: 700;
    position: relative;
    overflow: hidden;
}

.btn:focus-visible {
    outline: 3px solid var(--accent);
    outline-offset: 4px;
}

.btn::after {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(circle, rgba(255,255,255,0.18), transparent 45%);
    opacity: 0;
    transition: opacity 180ms ease;
}

.btn:hover::after {
    opacity: 1;
}

.btn-primary {
    background: linear-gradient(135deg, var(--accent), var(--accent-strong));
    color: #051517;
    box-shadow: 0 18px 40px rgba(0, 212, 198, 0.24);
}

.btn-secondary {
    background: rgba(17, 65, 123, 0.15);
    color: var(--text);
    border: 1px solid rgba(255,255,255,0.12);
}

.btn-tertiary {
    background: rgba(145, 81, 184, 0.18);
    color: var(--text);
}

.btn-link {
    padding: 0.8rem 1rem;
    background: rgba(255,255,255,0.06);
    color: var(--accent);
    border-radius: 16px;
}

.btn-animated {
    animation: buttonStretch 2.5s ease-in-out infinite;
    position: relative;
}

.btn-animated:hover {
    animation: buttonStretchHover 0.6s ease-out forwards;
}

.btn-animated::before {
    content: '';
    position: absolute;
    inset: -2px;
    border-radius: 999px;
    background: linear-gradient(45deg, transparent, rgba(255,255,255,0.1), transparent);
    opacity: 0;
    animation: shine 2s ease-in-out infinite;
    pointer-events: none;
}

.btn-animated:hover::before {
    animation: shine 0.8s ease-in-out;
}

@keyframes buttonStretch {
    0% { 
        transform: scaleX(1) scaleY(1);
        filter: hue-rotate(0deg);
    }
    25% { 
        transform: scaleX(1.08) scaleY(0.96);
        filter: hue-rotate(4deg);
    }
    50% { 
        transform: scaleX(0.98) scaleY(1.05);
        filter: hue-rotate(0deg);
    }
    75% { 
        transform: scaleX(1.04) scaleY(0.98);
        filter: hue-rotate(-4deg);
    }
    100% { 
        transform: scaleX(1) scaleY(1);
        filter: hue-rotate(0deg);
    }
}

@keyframes buttonStretchHover {
    0% {
        transform: scaleX(1) scaleY(1);
    }
    50% {
        transform: scaleX(1.12) scaleY(0.92);
    }
    100% {
        transform: scaleX(1.05) scaleY(0.98);
    }
}

@keyframes shine {
    0% { opacity: 0; transform: translateX(-100%); }
    50% { opacity: 1; }
    100% { opacity: 0; transform: translateX(100%); }
}

@keyframes ripple {
    to {
        transform: scale(4);
        opacity: 0;
    }
}

body.matrix-mode .btn-animated {
    animation: matrixDecode 3.2s ease-in-out infinite alternate;
}

body.matrix-mode .btn-animated:hover {
    animation: matrixLettersFall 1.2s ease-out forwards;
}

@keyframes matrixDecode {
    0% { transform: scaleX(1) translateY(0); filter: hue-rotate(0deg); }
    50% { transform: scaleX(1.04) translateY(-2px); filter: hue-rotate(6deg); }
    100% { transform: scaleX(0.96) translateY(0); filter: hue-rotate(-6deg); }
}

@keyframes matrixLettersFall {
    0% {
        transform: translateY(0) scaleY(1);
        opacity: 1;
        text-shadow: 0 0 10px rgba(0, 255, 128, 0.8);
    }
    50% {
        transform: translateY(8px) scaleY(1.1);
        text-shadow: 0 0 20px rgba(0, 255, 128, 1);
    }
    100% {
        transform: translateY(12px) scaleY(0.95);
        opacity: 0.8;
        text-shadow: 0 0 10px rgba(0, 255, 128, 0.5);
    }
}

.hero-stats {
    display: grid;
    gap: 20px;
}

.stat-card {
    padding: 28px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255,255,255,0.06);
    border-radius: 28px;
    box-shadow: var(--shadow);
}

.stat-card strong {
    display: block;
    font-size: 3rem;
    color: var(--accent);
}

.stat-card span {
    color: var(--muted);
}

.section {
    padding: 100px 24px;
    max-width: 1180px;
    margin: 0 auto;
}

.section-header {
    margin-bottom: 32px;
}

.section-alt {
    background: rgba(255,255,255,0.02);
}

.section-header span {
    color: var(--accent-alt);
    text-transform: uppercase;
    letter-spacing: 0.24em;
    font-size: 0.85rem;
}

.section-header h2 {
    margin: 14px 0 0;
    font-size: clamp(2rem, 3vw, 3rem);
    line-height: 1.05;
}

.about-grid,
.projects-grid,
.skills-grid,
.contact-grid {
    display: grid;
    gap: 32px;
}

.about-grid {
    grid-template-columns: 1.4fr 1fr;
    align-items: start;
}

.about-highlights {
    display: grid;
    gap: 16px;
    margin-top: 24px;
}

.highlight {
    padding: 22px;
    border-radius: 24px;
    background: rgba(0, 76, 148, 0.18);
    border: 1px solid rgba(0, 110, 207, 0.12);
}

.highlight span {
    display: block;
    font-size: 0.95rem;
    color: var(--accent-strong);
    margin-bottom: 10px;
}

.highlight strong {
    display: block;
    color: var(--text);
    line-height: 1.7;
}

.projects-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
}

.project-card {
    padding: 28px;
    border-radius: 28px;
    background: rgba(255,255,255,0.04);
    border: 1px solid rgba(255,255,255,0.06);
    box-shadow: var(--shadow);
    display: flex;
    flex-direction: column;
    gap: 18px;
}

.project-card:hover {
    transform: translateY(-4px);
}

.project-tag {
    color: var(--accent);
    text-transform: uppercase;
    letter-spacing: 0.14em;
    font-size: 0.78rem;
}

.project-card h3 {
    margin: 0;
}

.project-card p {
    color: var(--muted);
    line-height: 1.8;
    margin: 0;
}

.project-footer {
    margin-top: auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    flex-wrap: wrap;
}

.timeline {
    display: grid;
    gap: 18px;
}

.timeline-item {
    padding: 24px;
    border-radius: 24px;
    background: rgba(255,255,255,0.03);
    border: 1px solid rgba(255,255,255,0.05);
}

.timeline-item h3 {
    margin: 0 0 10px;
}

.timeline-item p {
    margin: 0;
    color: var(--muted);
}

.skills-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
}

.skill-card {
    padding: 28px;
    border-radius: 24px;
    background: linear-gradient(180deg, rgba(67, 115, 189, 0.12), rgba(13, 29, 44, 0.9));
    border: 1px solid rgba(255,255,255,0.05);
}

.skill-card h3 {
    margin: 0 0 10px;
}

.skill-card p {
    margin: 0;
    color: var(--muted);
}

.contact-section .contact-grid {
    grid-template-columns: 1fr 1.05fr;
}

/* Responsive: apilar la información de contacto encima del formulario en móvil */
@media (max-width: 900px) {
    .about-grid,
    .projects-grid,
    .skills-grid,
    .contact-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .hero {
        padding: 56px 16px 40px;
    }

    .hero-grid {
        gap: 24px;
        grid-template-columns: 1fr;
    }

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

    .skills-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

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

    .contact-info {
        order: 0;
    }

    .contact-form {
        order: 1;
    }
}

.certs-grid {
    display: grid;
    gap: 24px;
    grid-template-columns: repeat(2, minmax(0, 1fr));
}

.cert-card {
    padding: 28px;
    border-radius: 24px;
    background: rgba(255,255,255,0.04);
    border: 1px solid rgba(255,255,255,0.06);
    box-shadow: var(--shadow);
    display: grid;
    gap: 16px;
}

.contact-info {
    display: grid;
    gap: 18px;
    padding: 28px;
    border-radius: 28px;
    background: rgba(255,255,255,0.05);
    border: 1px solid rgba(255,255,255,0.06);
}

.contact-info strong {
    display: block;
    margin-bottom: 8px;
}

.contact-info a,
.contact-info span {
    color: var(--text);
}

.contact-form {
    display: grid;
    gap: 16px;
    padding: 28px;
    border-radius: 28px;
    background: rgba(255,255,255,0.03);
    border: 1px solid rgba(255,255,255,0.06);
}

.contact-form label {
    display: grid;
    gap: 10px;
    color: var(--muted);
    font-size: 0.94rem;
}

.contact-form input,
.contact-form textarea {
    width: 100%;
    padding: 16px;
    border-radius: 18px;
    border: 1px solid rgba(255,255,255,0.08);
    background: rgba(255,255,255,0.03);
    color: var(--text);
    font: inherit;
}

.contact-form textarea {
    resize: vertical;
}

.form-status {
    margin: 0;
    min-height: 22px;
    color: var(--accent);
}

.policies {
    background: rgba(255,255,255,0.01);
}

.policies-container {
    display: grid;
    gap: 32px;
    grid-template-columns: repeat(3, 1fr);
}

.policy-box {
    padding: 32px;
    border-radius: 28px;
    background: rgba(255,255,255,0.04);
    border: 1px solid rgba(255,255,255,0.06);
    max-height: 600px;
    overflow-y: auto;
}

.policy-box h3 {
    margin: 0 0 16px;
    font-size: 1.4rem;
    color: var(--accent);
}

.policy-box h4 {
    margin: 20px 0 10px;
    font-size: 1rem;
    color: var(--accent-strong);
}

.policy-box p,
.policy-box ul {
    margin: 12px 0;
    color: var(--muted);
    line-height: 1.7;
    font-size: 0.95rem;
}

.policy-box ul {
    list-style: disc;
    padding-left: 20px;
}

.policy-box li {
    margin: 8px 0;
}

.policy-page {
    background: linear-gradient(180deg, rgba(29, 189, 142, 0.08) 0%, transparent 40%);
}

.policy-full {
    max-width: 900px;
    margin: 0 auto;
    padding: 40px;
    background: rgba(255,255,255,0.03);
    border-radius: 28px;
    border: 1px solid rgba(255,255,255,0.06);
}

.policy-full h1 {
    font-size: 2.5rem;
    margin-bottom: 24px;
    color: var(--accent);
}

.policy-full h2 {
    font-size: 1.4rem;
    margin-top: 32px;
    margin-bottom: 16px;
    color: var(--accent-strong);
}

.policy-full h3 {
    font-size: 1.1rem;
    margin-top: 24px;
    margin-bottom: 12px;
    color: var(--accent);
}

.policy-full p {
    margin: 12px 0;
    line-height: 1.8;
    color: var(--muted);
}

.policy-full ul {
    list-style: disc;
    padding-left: 24px;
    margin: 12px 0;
}

.policy-full li {
    margin: 8px 0;
    line-height: 1.7;
    color: var(--muted);
}

.policy-full a {
    color: var(--accent);
    transition: color 180ms ease;
}

.policy-full a:hover {
    color: var(--accent-strong);
}

.back-link {
    margin-top: 40px;
    padding-top: 24px;
    border-top: 1px solid rgba(255,255,255,0.1);
    text-align: center;
}

.cookie-banner {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: rgba(5, 16, 24, 0.98);
    backdrop-filter: blur(16px);
    border-top: 1px solid rgba(255,255,255,0.1);
    padding: 20px 24px;
    z-index: 998;
    animation: slideUp 0.3s ease-out;
}

@keyframes slideUp {
    from {
        transform: translateY(100%);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

.cookie-content {
    max-width: 1180px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
}

.cookie-banner h3 {
    margin: 0;
    font-size: 1.1rem;
}

.cookie-banner p {
    margin: 8px 0 0;
    color: var(--muted);
    font-size: 0.9rem;
    line-height: 1.6;
}

.cookie-buttons {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
    white-space: nowrap;
}

.cookie-preferences-modal {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 999;
    animation: fadeIn 0.3s ease-out;
}

.cookie-preferences-modal[hidden] {
    display: none;
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

.preferences-content {
    background: var(--surface);
    border-radius: 28px;
    padding: 40px;
    max-width: 500px;
    width: 90%;
    border: 1px solid rgba(255,255,255,0.1);
}

.preferences-content h3 {
    margin: 0 0 24px;
    font-size: 1.4rem;
}

.cookie-option {
    margin-bottom: 24px;
    padding-bottom: 24px;
    border-bottom: 1px solid rgba(255,255,255,0.05);
}

.cookie-option:last-child {
    margin-bottom: 0;
    padding-bottom: 0;
    border-bottom: none;
}

.cookie-option label {
    display: flex;
    align-items: center;
    gap: 12px;
    cursor: pointer;
    margin-bottom: 8px;
}

.cookie-option input[type="checkbox"] {
    width: 20px;
    height: 20px;
    cursor: pointer;
    accent-color: var(--accent);
}

.cookie-option input[type="checkbox"]:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.cookie-option span {
    color: var(--text);
}

.cookie-option p {
    margin: 8px 0 0;
    color: var(--muted);
    font-size: 0.9rem;
    line-height: 1.6;
}

.preferences-buttons {
    display: flex;
    gap: 12px;
    justify-content: flex-end;
    margin-top: 32px;
}

.footer-links {
    margin-top: 16px;
    font-size: 0.85rem;
}

.footer-links a {
    color: var(--accent);
    transition: color 180ms ease;
}

.footer-links a:hover {
    color: var(--accent-strong);
}

.footer {
    padding: 32px 24px;
    text-align: center;
    color: var(--muted);
}

@media (max-width: 900px) {
    .hero-grid,
    .about-grid,
    .projects-grid,
    .skills-grid,
    .contact-grid,
    .certs-grid {
        grid-template-columns: 1fr;
    }

    .nav-list {
        gap: 16px;
        padding: 14px 18px;
    }

    .cookie-content {
        flex-direction: column;
        align-items: flex-start;
    }

    .cookie-buttons {
        width: 100%;
        justify-content: flex-end;
    }
}

@media (max-width: 640px) {
    .hero {
        padding-top: 60px;
    }

    .hero-actions {
        flex-direction: column;
        align-items: stretch;
    }

    .hero-actions .btn {
        width: 100%;
    }

    .btn {
        width: auto;
    }
}

body.matrix-mode .btn {
    background: linear-gradient(135deg, #0fa69d, #3c93fa);
}

body.matrix-mode .project-card,
body.matrix-mode .timeline-item,
body.matrix-mode .skill-card,
body.matrix-mode .contact-info,
body.matrix-mode .contact-form {
    background: rgba(0, 0, 0, 0.55);
    border-color: rgba(0, 255, 128, 0.12);
}

body.matrix-mode .hero::before {
    background: radial-gradient(circle at top right, rgba(0, 255, 128, 0.22), transparent 22%),
                radial-gradient(circle at left center, rgba(0, 212, 198, 0.12), transparent 18%);
}