:root {
    --bg: #0f172a;
    --bg-card: #1e293b;
    --bg-alt: #162032;
    --text: #f8fafc;
    --text-muted: #94a3b8;
    --primary: #38bdf8;
    --primary-hover: #0ea5e9;
    --border: #334155;
    --radius: 8px;
}

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

html {
    scroll-behavior: smooth;
}

[id] {
    scroll-margin-top: 80px;
}

:focus-visible {
    outline: 2px solid var(--primary);
    outline-offset: 2px;
}

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

.container {
    width: 90%;
    max-width: 1100px;
    margin: 0 auto;
}

/* Header & Nav */
.navbar {
    position: sticky;
    top: 0;
    background-color: rgba(15, 23, 42, 0.9);
    backdrop-filter: blur(8px);
    border-bottom: 1px solid var(--border);
    z-index: 100;
}

.nav-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 0;
}

.logo {
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--text);
    text-decoration: none;
}

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

.nav-links {
    display: flex;
    list-style: none;
    gap: 1.5rem;
    align-items: center;
}

.nav-links a {
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.95rem;
    transition: color 0.2s;
}

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

.nav-links a:not(.btn) {
    padding: 0.5rem 0.75rem;
    border-radius: var(--radius);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 5px;
    width: 44px;
    height: 44px;
    padding: 0;
    background: none;
    border: none;
    cursor: pointer;
}

.nav-toggle span {
    display: block;
    width: 22px;
    height: 2px;
    background: var(--text);
    border-radius: 2px;
    transition: transform 0.2s ease, opacity 0.2s ease;
}

.nav-toggle[aria-expanded="true"] span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] span:nth-child(2) {
    opacity: 0;
}

.nav-toggle[aria-expanded="true"] span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

/* Hero */
.hero {
    padding: 6rem 0 4rem;
    text-align: center;
    background:
        radial-gradient(ellipse 65% 55% at 50% -15%, rgba(56, 189, 248, 0.16), transparent),
        radial-gradient(ellipse 45% 45% at 95% 85%, rgba(56, 189, 248, 0.06), transparent);
}

.hero-content {
    max-width: 800px;
}

.badge {
    display: inline-block;
    background: rgba(56, 189, 248, 0.1);
    color: var(--primary);
    padding: 0.35rem 0.85rem;
    border-radius: 50px;
    font-size: 0.85rem;
    margin-bottom: 1.25rem;
    border: 1px solid rgba(56, 189, 248, 0.25);
}

.hero h1 {
    font-size: 2.5rem;
    line-height: 1.2;
    margin-bottom: 1.25rem;
    font-weight: 700;
}

.hero p {
    color: var(--text-muted);
    font-size: 1.15rem;
    margin-bottom: 2rem;
}

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

/* Botones */
.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    border-radius: var(--radius);
    text-decoration: none;
    font-weight: 600;
    transition: all 0.2s ease;
}

.btn-sm {
    padding: 0.4rem 0.9rem;
}

.btn-primary {
    background: var(--primary);
    color: #0f172a;
}

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

.btn-secondary {
    border: 1px solid var(--border);
    color: var(--text);
}

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

/* Secciones */
.section {
    padding: 5rem 0;
}

.bg-alt {
    background-color: var(--bg-alt);
}

.section-title {
    font-size: 1.85rem;
    text-align: center;
    margin-bottom: 1rem;
}

.section-subtitle {
    text-align: center;
    color: var(--text-muted);
    margin-bottom: 2.5rem;
}

/* Grids y Tarjetas */
.grid {
    display: grid;
    gap: 1.5rem;
}

.grid-3 {
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.grid-2 {
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
}

.card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    padding: 2rem;
    border-radius: var(--radius);
}

.card-icon {
    font-size: 2rem;
    margin-bottom: 1rem;
}

.card h3 {
    margin-bottom: 0.75rem;
    font-size: 1.25rem;
}

.card p {
    color: var(--text-muted);
    font-size: 0.95rem;
}

/* Stack Tecnológico */
.stack-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    justify-content: center;
    max-width: 700px;
    margin: 2rem auto 0;
}

.tech-tag {
    background: var(--bg-card);
    border: 1px solid var(--border);
    padding: 0.5rem 1rem;
    border-radius: var(--radius);
    font-size: 0.9rem;
    color: var(--primary);
}

/* Proyectos */
.project-card {
    display: flex;
    flex-direction: column;
}

.project-tags {
    display: flex;
    gap: 0.5rem;
    margin: 1rem 0 1.5rem;
}

.project-tags span {
    font-size: 0.8rem;
    background: rgba(255, 255, 255, 0.05);
    padding: 0.2rem 0.5rem;
    border-radius: 4px;
    color: var(--text-muted);
}

.project-link {
    margin-top: auto;
    color: var(--primary);
    text-decoration: none;
    font-weight: 600;
    font-size: 0.95rem;
}

.project-link:hover {
    text-decoration: underline;
}

.project-card .coming-soon {
    color: var(--text-muted);
    font-weight: 600;
    font-size: 0.95rem;
}

/* Contacto y Footer */
.contact-container {
    text-align: center;
    max-width: 600px;
}

.contact-container p {
    color: var(--text-muted);
    margin: 0.75rem 0 2rem;
}

.contact-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    justify-content: center;
}

footer {
    padding: 2rem 0;
    border-top: 1px solid var(--border);
    text-align: center;
    color: var(--text-muted);
    font-size: 0.9rem;
}

@media (max-width: 640px) {
    .hero h1 {
        font-size: 2rem;
    }

    .hero {
        padding: 4rem 0 3rem;
    }

    .nav-toggle {
        display: flex;
    }

    .nav-links {
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        flex-direction: column;
        align-items: stretch;
        gap: 1rem;
        background: var(--bg-card);
        border-bottom: 1px solid var(--border);
        padding: 1rem 1.25rem 1.5rem;
        display: none;
    }

    .nav-links.open {
        display: flex;
    }

    .nav-links.open li {
        text-align: center;
    }

    .nav-links.open a {
        display: block;
        padding: 0.75rem;
        font-size: 1rem;
    }
}

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        scroll-behavior: auto !important;
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}