:root {
    --primary-color: #2563eb;
    --secondary-color: #1e40af;
    --text-color: #1f2937;
    --muted-color: #4b5563;
    --light-bg: #f9fafb;
    --bg: #ffffff;
    --border: #e5e7eb;
    --term-bg: #0f172a;
    --term-text: #e2e8f0;
    --term-dim: #94a3b8;
    --term-ok: #86efac;
    --font-sans: "IBM Plex Sans", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
    --font-mono: "IBM Plex Mono", ui-monospace, "Cascadia Code", Consolas, monospace;
    --nav-h: 64px;
}

@media (prefers-color-scheme: dark) {
    :root {
        --primary-color: #60a5fa;
        --secondary-color: #93c5fd;
        --text-color: #e5e7eb;
        --muted-color: #9ca3af;
        --light-bg: #111827;
        --bg: #0b1220;
        --border: #1f2937;
    }
}

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

html { scroll-behavior: smooth; scroll-padding-top: var(--nav-h); }

@media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
}

body {
    font-family: var(--font-sans);
    font-size: 1.0625rem;
    line-height: 1.65;
    color: var(--text-color);
    background: var(--bg);
}

a { color: var(--primary-color); }
a:hover { color: var(--secondary-color); }
a:focus-visible, button:focus-visible {
    outline: 3px solid var(--primary-color);
    outline-offset: 3px;
    border-radius: 4px;
}

.container { max-width: 1100px; margin: 0 auto; padding: 0 1.5rem; }
.container.narrow { max-width: 760px; }

/* ---------- Navegación ---------- */
.navbar {
    position: sticky;
    top: 0;
    z-index: 10;
    height: var(--nav-h);
    background: var(--bg);
    border-bottom: 1px solid var(--border);
}

.nav-inner {
    max-width: 1100px;
    height: 100%;
    margin: 0 auto;
    padding: 0 1.5rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    font-weight: 700;
    font-size: 1.1rem;
    color: var(--text-color);
    text-decoration: none;
}

.nav-menu { display: flex; gap: 1.5rem; }

.nav-menu a {
    color: var(--muted-color);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.95rem;
}

.nav-menu a:hover, .nav-menu a.active { color: var(--primary-color); }

.nav-toggle {
    display: none;
    background: none;
    border: 0;
    padding: 0.5rem;
    cursor: pointer;
}

.nav-toggle span {
    display: block;
    width: 22px;
    height: 2px;
    margin: 5px 0;
    background: var(--text-color);
}

@media (max-width: 820px) {
    .nav-toggle { display: block; }

    .nav-menu {
        display: none;
        position: absolute;
        top: var(--nav-h);
        left: 0;
        right: 0;
        flex-direction: column;
        gap: 0;
        background: var(--bg);
        border-bottom: 1px solid var(--border);
        padding: 0.5rem 1.5rem 1rem;
    }

    .nav-menu.open { display: flex; }
    .nav-menu a { padding: 0.65rem 0; }
}

/* ---------- Inicio ---------- */
.hero { padding: 5rem 0 4.5rem; }

.hero-grid {
    display: grid;
    grid-template-columns: 1.1fr 1fr;
    gap: 3.5rem;
    align-items: center;
}

.hero-name {
    font-weight: 500;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.hero h1 {
    font-size: clamp(2rem, 4.5vw, 3rem);
    line-height: 1.12;
    letter-spacing: -0.02em;
    margin-bottom: 1.25rem;
}

.hero-sub {
    color: var(--muted-color);
    font-size: 1.125rem;
    max-width: 34rem;
    margin-bottom: 2rem;
}

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

.btn {
    display: inline-block;
    padding: 0.7rem 1.3rem;
    border-radius: 6px;
    font-weight: 600;
    text-decoration: none;
    border: 2px solid var(--primary-color);
}

.btn-primary { background: var(--primary-color); color: #fff; }
.btn-primary:hover { background: var(--secondary-color); border-color: var(--secondary-color); color: #fff; }
.btn-outline { color: var(--primary-color); }
.btn-outline:hover { border-color: var(--secondary-color); }

@media (prefers-color-scheme: dark) {
    .btn-primary, .btn-primary:hover { color: #0b1220; }
}

/* Panel de estado */
.status {
    background: var(--term-bg);
    color: var(--term-text);
    border-radius: 10px;
    overflow: hidden;
    font-family: var(--font-mono);
    font-size: 0.9rem;
    box-shadow: 0 20px 40px -20px rgba(15, 23, 42, 0.5);
}

.status-bar {
    display: flex;
    gap: 6px;
    padding: 0.75rem 1rem;
    background: #1e293b;
}

.status-bar span {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: #475569;
}

.status-body { padding: 1.25rem 1.4rem 1.4rem; }

.status-cmd { margin-bottom: 0.9rem; }
.status-cmd .prompt { color: var(--term-dim); }

.status dl div {
    display: grid;
    grid-template-columns: 9.5rem 1fr;
    gap: 0.75rem;
    padding: 0.3rem 0;
}

.status dt { color: var(--term-dim); }
.status dd { color: var(--term-ok); }

@media (max-width: 820px) {
    .hero { padding: 3rem 0; }
    .hero-grid { grid-template-columns: 1fr; gap: 2.5rem; }
}

@media (max-width: 420px) {
    .status dl div { grid-template-columns: 1fr; gap: 0; padding: 0.4rem 0; }
}

/* ---------- Secciones ---------- */
.section { padding: 4.5rem 0; }
.section-alt { background: var(--light-bg); }

.section h2 {
    font-size: clamp(1.6rem, 3vw, 2rem);
    letter-spacing: -0.01em;
    margin-bottom: 1.5rem;
}

.section p + p { margin-top: 1rem; }

.section-intro { color: var(--muted-color); margin: -0.75rem 0 2rem; }

/* Línea de tiempo */
.timeline { list-style: none; border-left: 2px solid var(--border); margin-left: 0.4rem; }

.timeline > li { position: relative; padding: 0 0 2.5rem 1.75rem; }
.timeline > li:last-child { padding-bottom: 0; }

.timeline > li::before {
    content: "";
    position: absolute;
    left: -7px;
    top: 0.45rem;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--primary-color);
    box-shadow: 0 0 0 4px var(--light-bg);
}

.tl-date { font-size: 0.9rem; color: var(--muted-color); }
.timeline h3 { font-size: 1.2rem; margin-top: 0.15rem; }
.tl-org { color: var(--primary-color); font-weight: 500; margin: 0.1rem 0 0.75rem; }

.timeline ul { list-style: disc; padding-left: 1.1rem; }
.timeline ul li { margin-bottom: 0.45rem; }
.timeline ul li::marker { color: var(--muted-color); }

/* Proyectos */
.projects {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
}

.project {
    display: flex;
    flex-direction: column;
    padding: 1.6rem;
    border: 1px solid var(--border);
    border-top: 3px solid var(--primary-color);
    border-radius: 8px;
    background: var(--bg);
}

.project h3 { font-size: 1.15rem; margin-bottom: 0.75rem; line-height: 1.3; }
.project p { color: var(--muted-color); font-size: 0.98rem; }
.project .tags { font-family: var(--font-mono); font-size: 0.8rem; margin-top: 1rem; }
.project a { margin-top: auto; padding-top: 1rem; font-weight: 600; }

/* Habilidades */
.skills {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 2rem 2.5rem;
}

.skill-group h3 { font-size: 1rem; margin-bottom: 0.35rem; }
.skill-group p { color: var(--muted-color); font-size: 0.97rem; }

/* Formación */
.edu h3 { font-size: 1.15rem; }
.edu p { color: var(--muted-color); }

.sub-heading { font-size: 1.15rem; margin: 2.5rem 0 1rem; }

.courses { list-style: none; }

.courses li {
    display: flex;
    justify-content: space-between;
    gap: 1rem;
    padding: 0.7rem 0;
    border-bottom: 1px solid var(--border);
}

.courses li span:last-child { color: var(--muted-color); white-space: nowrap; }

/* Contacto */
.contact { list-style: none; margin-top: 1.5rem; }

.contact li {
    display: grid;
    grid-template-columns: 7rem 1fr;
    gap: 1rem;
    padding: 0.6rem 0;
    border-bottom: 1px solid var(--border);
}

.c-label { color: var(--muted-color); }
.contact a { word-break: break-word; }

/* Pie */
.footer {
    padding: 2rem 1.5rem;
    text-align: center;
    color: var(--muted-color);
    font-size: 0.9rem;
    border-top: 1px solid var(--border);
}