:root {
    --blue:       #3b82f6;
    --blue-glow:  rgba(59, 130, 246, 0.18);
    --blue-soft:  rgba(59, 130, 246, 0.10);
    --bg:         #080c14;
    --bg-card:    #0d1220;
    --bg-card2:   #111827;
    --border:     rgba(255,255,255,0.07);
    --border-h:   rgba(59,130,246,0.4);
    --text:       #e8edf5;
    --text-muted: #6b7a99;
    --text-dim:   #3d4f6e;
    --white:      #ffffff;
    --radius:     16px;
    --radius-lg:  24px;
    --ease:       cubic-bezier(0.16, 1, 0.3, 1);
    --t:          0.4s;
}
 
/* ── Reset ──────────────────────────────────────────────────── */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}
 
html { scroll-behavior: smooth; }
 
body {
    font-family: 'DM Sans', sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.65;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}
 
/* ── Background elements ────────────────────────────────────── */
.bg-grid {
    position: fixed;
    inset: 0;
    background-image:
        linear-gradient(rgba(59,130,246,0.04) 1px, transparent 1px),
        linear-gradient(90deg, rgba(59,130,246,0.04) 1px, transparent 1px);
    background-size: 60px 60px;
    pointer-events: none;
    z-index: 0;
}
 
.bg-orb {
    position: fixed;
    border-radius: 50%;
    filter: blur(90px);
    pointer-events: none;
    z-index: 0;
    opacity: 0.35;
}
.orb-1 {
    width: 600px; height: 600px;
    background: radial-gradient(circle, rgba(59,130,246,0.3) 0%, transparent 70%);
    top: -200px; right: -200px;
    animation: drift 14s ease-in-out infinite alternate;
}
.orb-2 {
    width: 500px; height: 500px;
    background: radial-gradient(circle, rgba(99,102,241,0.2) 0%, transparent 70%);
    bottom: -200px; left: -200px;
    animation: drift 18s ease-in-out infinite alternate-reverse;
}
@keyframes drift {
    0%   { transform: translate(0, 0); }
    100% { transform: translate(40px, 40px); }
}
 
/* ── Layout ─────────────────────────────────────────────────── */
.container {
    max-width: 1120px;
    margin: 0 auto;
    padding: 0 2rem;
    position: relative;
    z-index: 1;
}
 
/* ── Navbar ─────────────────────────────────────────────────── */
.navbar {
    position: sticky;
    top: 0;
    z-index: 100;
    padding: 1.2rem 0;
    transition: background var(--t) var(--ease), border-color var(--t);
    border-bottom: 1px solid transparent;
}
.navbar.scrolled {
    background: rgba(8, 12, 20, 0.85);
    backdrop-filter: blur(18px);
    -webkit-backdrop-filter: blur(18px);
    border-bottom-color: var(--border);
}
 
.nav-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
}
 
.logo {
    font-family: 'Syne', sans-serif;
    font-weight: 800;
    font-size: 1.2rem;
    color: var(--white);
    letter-spacing: 0.02em;
    text-decoration: none;
}
.logo span {
    color: var(--blue);
}
 
.nav-links {
    list-style: none;
    display: flex;
    align-items: center;
    gap: 2.5rem;
}
.nav-links a {
    text-decoration: none;
    color: var(--text-muted);
    font-size: 0.9rem;
    font-weight: 500;
    letter-spacing: 0.01em;
    transition: color var(--t);
}
.nav-links a:hover { color: var(--white); }
.nav-links .nav-cta {
    background: var(--blue);
    color: var(--white);
    padding: 0.5rem 1.2rem;
    border-radius: 50px;
    font-size: 0.85rem;
}
.nav-links .nav-cta:hover { background: #2563eb; color: var(--white); }
 
/* Hamburger */
.menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
}
.menu-toggle span {
    display: block;
    width: 22px; height: 2px;
    background: var(--text);
    border-radius: 2px;
    transition: all 0.3s;
    transform-origin: center;
}
.menu-toggle.active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.menu-toggle.active span:nth-child(2) { opacity: 0; }
.menu-toggle.active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
 
/* Mobile menu */
.mobile-menu {
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(8,12,20,0.97);
    backdrop-filter: blur(20px);
    z-index: 99;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s;
}
.mobile-menu.open { opacity: 1; pointer-events: all; }
.mobile-menu ul { list-style: none; text-align: center; }
.mobile-menu ul li { margin: 1.5rem 0; }
.mobile-menu ul a {
    text-decoration: none;
    font-family: 'Syne', sans-serif;
    font-size: 2.2rem;
    font-weight: 700;
    color: var(--text);
    transition: color 0.2s;
}
.mobile-menu ul a:hover { color: var(--blue); }
 
/* ── Hero ───────────────────────────────────────────────────── */
.hero {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding: 120px 0 80px;
    position: relative;
}
 
.hero-inner {
    display: grid;
    grid-template-columns: 1fr 420px;
    gap: 4rem;
    align-items: center;
}
 
/* Badge */
.badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: rgba(59,130,246,0.1);
    border: 1px solid rgba(59,130,246,0.3);
    color: #93c5fd;
    padding: 6px 14px;
    border-radius: 50px;
    font-size: 0.78rem;
    font-weight: 500;
    letter-spacing: 0.03em;
    margin-bottom: 2rem;
}
.badge-dot {
    width: 6px; height: 6px;
    background: #4ade80;
    border-radius: 50%;
    animation: pulse-dot 2s infinite;
}
@keyframes pulse-dot {
    0%, 100% { opacity: 1; transform: scale(1); }
    50%       { opacity: 0.6; transform: scale(0.8); }
}
 
/* Hero name */
.hero-name {
    font-family: 'Syne', sans-serif;
    font-weight: 800;
    font-size: clamp(3rem, 6vw, 5.5rem);
    line-height: 1.0;
    letter-spacing: -0.03em;
    color: var(--white);
    margin-bottom: 1.5rem;
}
.line { display: block; }
.accent-line {
    color: transparent;
    -webkit-text-stroke: 2px var(--blue);
    position: relative;
}
 
.hero-role {
    font-size: 1.15rem;
    color: var(--text-muted);
    font-weight: 400;
    margin-bottom: 1rem;
}
.hero-role em {
    font-style: italic;
    color: var(--blue);
}
 
.hero-desc {
    font-size: 1rem;
    color: var(--text-muted);
    max-width: 520px;
    margin-bottom: 2.5rem;
    line-height: 1.75;
}
 
.hero-btns {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}
 
/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 0.8rem 1.8rem;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    font-size: 0.9rem;
    transition: all var(--t) var(--ease);
    letter-spacing: 0.01em;
}
.btn-primary {
    background: var(--blue);
    color: var(--white);
    box-shadow: 0 0 30px rgba(59,130,246,0.3);
}
.btn-primary:hover {
    background: #2563eb;
    transform: translateY(-2px);
    box-shadow: 0 0 40px rgba(59,130,246,0.5);
}
.btn-ghost {
    border: 1px solid var(--border);
    color: var(--text);
    background: transparent;
}
.btn-ghost:hover {
    border-color: var(--blue);
    color: var(--blue);
    transform: translateY(-2px);
}
 
/* Hero Card */
.hero-card-wrap { position: relative; }
.hero-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 2rem;
    position: relative;
    overflow: hidden;
}
.hero-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--blue), transparent);
}
 
.card-label {
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    color: var(--text-dim);
    margin-bottom: 1.2rem;
    font-weight: 600;
}
 
.skill-pills {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
}
.pill {
    padding: 4px 12px;
    border-radius: 50px;
    font-size: 0.78rem;
    font-weight: 600;
    letter-spacing: 0.03em;
}
.pill-blue  { background: var(--blue-soft); color: #93c5fd; border: 1px solid rgba(59,130,246,0.25); }
.pill-dark  { background: rgba(255,255,255,0.05); color: var(--text-muted); border: 1px solid var(--border); }
 
.card-divider {
    height: 1px;
    background: var(--border);
    margin: 1.5rem 0;
}
 
.stat-row {
    display: flex;
    justify-content: space-around;
    text-align: center;
}
.stat-num {
    display: block;
    font-family: 'Syne', sans-serif;
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--white);
}
.stat-label {
    display: block;
    font-size: 0.72rem;
    color: var(--text-dim);
    margin-top: 2px;
}
 
/* Hero scroll indicator */
.hero-scroll {
    position: absolute;
    bottom: 2.5rem;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    color: var(--text-dim);
    font-size: 0.7rem;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    z-index: 1;
}
.scroll-line {
    width: 1px;
    height: 50px;
    background: linear-gradient(to bottom, var(--blue), transparent);
    animation: scroll-anim 2s ease-in-out infinite;
}
@keyframes scroll-anim {
    0%, 100% { opacity: 0.4; height: 30px; }
    50%       { opacity: 1;   height: 50px; }
}
 
/* ── Section shared ─────────────────────────────────────────── */
section {
    padding: 100px 0;
    position: relative;
    z-index: 1;
}
 
.section-header {
    display: flex;
    align-items: baseline;
    gap: 1rem;
    margin-bottom: 3.5rem;
}
.section-num {
    font-family: 'Syne', sans-serif;
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--blue);
    letter-spacing: 0.15em;
    opacity: 0.7;
}
.section-title {
    font-family: 'Syne', sans-serif;
    font-size: clamp(1.8rem, 3.5vw, 2.8rem);
    font-weight: 800;
    color: var(--white);
    letter-spacing: -0.02em;
}
 
/* ── Stack Section ──────────────────────────────────────────── */
.stack { background: rgba(255,255,255,0.01); }
 
.grid-stack {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 1.5rem;
}
 
.stack-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 2rem;
    transition: border-color var(--t), transform var(--t) var(--ease), box-shadow var(--t);
    opacity: 0;
    transform: translateY(20px);
}
.stack-card.visible {
    opacity: 1;
    transform: translateY(0);
    transition-delay: var(--delay, 0s);
}
.stack-card:hover {
    border-color: var(--border-h);
    transform: translateY(-4px);
    box-shadow: 0 8px 40px rgba(59,130,246,0.08);
}
 
.stack-icon {
    width: 48px; height: 48px;
    background: var(--blue-soft);
    border: 1px solid rgba(59,130,246,0.2);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.2rem;
    color: var(--blue);
}
 
.stack-card h3 {
    font-family: 'Syne', sans-serif;
    font-weight: 700;
    font-size: 1.05rem;
    color: var(--white);
    margin-bottom: 0.6rem;
}
.stack-card p {
    font-size: 0.88rem;
    color: var(--text-muted);
    line-height: 1.7;
    margin-bottom: 1.2rem;
}
 
.stack-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}
.stack-tags span {
    font-size: 0.7rem;
    font-weight: 600;
    color: var(--text-dim);
    background: rgba(255,255,255,0.04);
    border: 1px solid var(--border);
    border-radius: 4px;
    padding: 2px 8px;
    letter-spacing: 0.05em;
}
 
/* ── Projects ───────────────────────────────────────────────── */
.proyectos { background: rgba(0,0,0,0.3); }
 
.grid-proyectos {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 1.8rem;
}
 
.project-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: border-color var(--t), transform var(--t) var(--ease), box-shadow var(--t);
    position: relative;
    opacity: 0;
    transform: translateY(24px);
}
.project-card.visible {
    opacity: 1;
    transform: translateY(0);
}
.project-card:hover {
    border-color: var(--border-h);
    transform: translateY(-6px);
    box-shadow: 0 20px 60px rgba(59,130,246,0.1);
}
 
.project-featured { border-color: rgba(59,130,246,0.25); }
 
.project-glow {
    position: absolute;
    top: -60px; right: -60px;
    width: 200px; height: 200px;
    background: radial-gradient(circle, rgba(59,130,246,0.15) 0%, transparent 70%);
    pointer-events: none;
}
 
.project-content { padding: 2rem 2rem 1.5rem; }
 
.project-top {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.2rem;
}
 
.project-tag {
    font-size: 0.7rem;
    font-weight: 700;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    padding: 4px 10px;
    border-radius: 50px;
}
.tag-blue { background: var(--blue-soft); color: #93c5fd; border: 1px solid rgba(59,130,246,0.3); }
.tag-dark { background: rgba(255,255,255,0.05); color: var(--text-muted); border: 1px solid var(--border); }
 
.project-num {
    font-family: 'Syne', sans-serif;
    font-size: 2.5rem;
    font-weight: 800;
    color: rgba(255,255,255,0.04);
    line-height: 1;
}
 
.project-card h3 {
    font-family: 'Syne', sans-serif;
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--white);
    margin-bottom: 0.7rem;
    letter-spacing: -0.01em;
}
.project-card > .project-content > p {
    font-size: 0.9rem;
    color: var(--text-muted);
    line-height: 1.7;
    margin-bottom: 1.2rem;
}
 
.impact {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.45rem;
    margin-bottom: 1.5rem;
}
.impact li {
    font-size: 0.85rem;
    color: var(--text-muted);
    padding-left: 1.2rem;
    position: relative;
}
.impact li::before {
    content: '→';
    position: absolute;
    left: 0;
    color: var(--blue);
    font-size: 0.75rem;
}
 
.project-footer { border-top: 1px solid var(--border); padding-top: 1.2rem; }
 
.tech-dots {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}
.tech-dots span {
    font-size: 0.7rem;
    font-weight: 600;
    color: var(--text-dim);
    background: rgba(255,255,255,0.03);
    border: 1px solid var(--border);
    border-radius: 4px;
    padding: 3px 9px;
    letter-spacing: 0.04em;
}
 
/* ── Contact ────────────────────────────────────────────────── */
.contacto { background: rgba(255,255,255,0.01); }
 
.contacto-inner {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: start;
}
 
.contacto-text .section-num { display: block; margin-bottom: 0.5rem; }
.contacto-text .section-title { margin-bottom: 1rem; }
.contacto-text > p {
    color: var(--text-muted);
    font-size: 1rem;
    line-height: 1.75;
    margin-bottom: 2rem;
}
 
.contact-info {
    display: flex;
    flex-direction: column;
    gap: 0.8rem;
}
.contact-item {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.9rem;
    color: var(--text-muted);
}
.contact-item svg { color: var(--blue); flex-shrink: 0; }
 
.contacto-links {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}
 
.contact-card {
    display: flex;
    align-items: center;
    gap: 1rem;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.2rem 1.5rem;
    text-decoration: none;
    transition: border-color var(--t), transform var(--t) var(--ease), box-shadow var(--t);
    opacity: 0;
    transform: translateY(16px);
}
.contact-card.visible { opacity: 1; transform: translateY(0); }
.contact-card:hover {
    border-color: var(--border-h);
    transform: translateY(-3px);
    box-shadow: 0 8px 30px rgba(59,130,246,0.08);
}
 
.contact-card-icon {
    width: 44px; height: 44px;
    background: var(--blue-soft);
    border: 1px solid rgba(59,130,246,0.2);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.85rem;
    font-weight: 800;
    color: var(--blue);
    flex-shrink: 0;
    font-family: 'Syne', sans-serif;
}
 
.contact-card > div strong {
    display: block;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--white);
    margin-bottom: 2px;
}
.contact-card > div span {
    font-size: 0.78rem;
    color: var(--text-muted);
}
 
.contact-card .arrow {
    margin-left: auto;
    color: var(--text-dim);
    flex-shrink: 0;
    transition: transform var(--t), color var(--t);
}
.contact-card:hover .arrow {
    transform: translate(3px, -3px);
    color: var(--blue);
}
 
/* ── Footer ─────────────────────────────────────────────────── */
.footer {
    border-top: 1px solid var(--border);
    padding: 2rem 0;
    position: relative;
    z-index: 1;
}
.footer-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 1rem;
}
.footer p {
    font-size: 0.82rem;
    color: var(--text-dim);
}
.back-top {
    font-size: 0.82rem;
    color: var(--text-muted);
    text-decoration: none;
    transition: color var(--t);
}
.back-top:hover { color: var(--blue); }
 
/* ── Light mode override ─────────────────────────────────────── */
@media (prefers-color-scheme: light) {
    :root {
        --bg:       #f4f6fb;
        --bg-card:  #ffffff;
        --bg-card2: #f0f4ff;
        --border:   rgba(0,0,0,0.08);
        --border-h: rgba(59,130,246,0.5);
        --text:     #1a202c;
        --text-muted: #64748b;
        --text-dim: #a0aec0;
        --blue-soft: rgba(59,130,246,0.08);
    }
    body { background: var(--bg); color: var(--text); }
    .bg-grid { background-image:
        linear-gradient(rgba(59,130,246,0.06) 1px, transparent 1px),
        linear-gradient(90deg, rgba(59,130,246,0.06) 1px, transparent 1px);
    }
    .orb-1, .orb-2 { opacity: 0.12; }
    .navbar.scrolled { background: rgba(244,246,251,0.85); }
    .hero { background: none; }
    .hero-name { color: #0f172a; }
    .accent-line { -webkit-text-stroke-color: var(--blue); }
    .proyectos { background: rgba(0,0,0,0.02); }
    .project-num { color: rgba(0,0,0,0.04); }
    .stat-num { color: #0f172a; }
    .section-title { color: #0f172a; }
    .stack-card h3, .project-card h3 { color: #0f172a; }
    .contacto-text .section-title { color: #0f172a; }
    .contact-card > div strong { color: #0f172a; }
    .footer-inner .logo { color: #0f172a; }
}
 
/* ── Responsive ─────────────────────────────────────────────── */
@media (max-width: 900px) {
    .hero-inner {
        grid-template-columns: 1fr;
        gap: 3rem;
    }
    .hero-card-wrap { max-width: 420px; }
    .contacto-inner {
        grid-template-columns: 1fr;
        gap: 2.5rem;
    }
}
 
@media (max-width: 640px) {
    .nav-links { display: none; }
    .menu-toggle { display: flex; }
    .hero { padding: 100px 0 80px; min-height: auto; }
    .hero-name { font-size: clamp(2.5rem, 10vw, 4rem); }
    .hero-scroll { display: none; }
    section { padding: 70px 0; }
    .section-header { flex-direction: column; gap: 0.3rem; }
    .grid-stack { grid-template-columns: 1fr; }
    .grid-proyectos { grid-template-columns: 1fr; }
    .footer-inner { flex-direction: column; align-items: flex-start; }
    .hero-btns { flex-direction: column; }
    .btn { justify-content: center; text-align: center; }
}