/* ── SYSTEM DESIGN SYSTEM (LIGHT/WHITE THEME) ── */
:root {
    --bg: #ffffff;
    --bg-alt: #f8fafc;
    --bg-card: #ffffff;
    --border: #e2e8f0;
    --border-hover: #cbd5e1;
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --accent: #2563eb;
    --accent-hover: #1d4ed8;
    --accent-light: #eff6ff;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.04), 0 4px 6px -4px rgba(0, 0, 0, 0.04);
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    --font-mono: 'JetBrains Mono', monospace;
    --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
    background-color: var(--bg);
    color: var(--text-primary);
    font-family: var(--font-sans);
    line-height: 1.5;
    overflow-x: hidden;
    position: relative;
}

/* ── NAV BAR ── */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 70px;
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border);
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 10%;
    z-index: 100;
    transition: var(--transition);
}

.logo {
    font-size: 1.25rem;
    font-weight: 700;
    letter-spacing: -0.5px;
}

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

.nav-links {
    display: flex;
    gap: 32px;
}

.nav-links a {
    text-decoration: none;
    color: var(--text-secondary);
    font-size: 0.9rem;
    font-weight: 500;
    transition: var(--transition);
    padding: 6px 0;
}

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

.nav-toggle {
    display: none;
    color: var(--text-primary);
    cursor: pointer;
}

/* ── COMPONENTES GENERALES ── */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 22px;
    border-radius: 8px;
    font-size: 0.9rem;
    font-weight: 550;
    text-decoration: none;
    transition: var(--transition);
    cursor: pointer;
}

.btn-primary {
    background: var(--accent);
    color: #ffffff;
    border: 1px solid var(--accent);
    box-shadow: var(--shadow-sm);
}

.btn-primary:hover {
    background: var(--accent-hover);
    border-color: var(--accent-hover);
    transform: translateY(-1px);
}

.btn-secondary {
    background: #ffffff;
    color: var(--text-secondary);
    border: 1px solid var(--border);
    box-shadow: var(--shadow-sm);
}

.btn-secondary:hover {
    border-color: var(--border-hover);
    color: var(--text-primary);
    transform: translateY(-1px);
}

.highlight {
    color: var(--accent);
}

.section-title {
    font-size: 1.75rem;
    font-weight: 700;
    margin-bottom: 40px;
    display: flex;
    align-items: center;
    gap: 12px;
    letter-spacing: -0.5px;
}

.section-title .number {
    font-family: var(--font-mono);
    color: var(--accent);
    font-size: 1.1rem;
    font-weight: 500;
}

.section-title::after {
    content: '';
    flex: 1;
    height: 1px;
    background: var(--border);
}

/* ── HERO SECTION ── */
.hero {
    min-height: 90vh;
    max-width: 1100px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1.1fr 0.9fr;
    align-items: center;
    padding: 120px 24px 60px 24px;
    gap: 48px;
}

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

.badge {
    background: var(--accent-light);
    border: 1px solid rgba(37, 99, 235, 0.15);
    padding: 6px 14px;
    border-radius: 6px;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--accent);
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 24px;
    font-family: var(--font-mono);
}

.active-dot {
    width: 6px;
    height: 6px;
    background-color: #10b981;
    border-radius: 50%;
    display: inline-block;
}

.hero-title {
    font-size: 3.25rem;
    font-weight: 800;
    line-height: 1.15;
    margin-bottom: 20px;
    letter-spacing: -1.5px;
}

.hero-subtitle {
    font-size: 1.05rem;
    color: var(--text-secondary);
    max-width: 500px;
    margin-bottom: 32px;
}

.hero-actions {
    display: flex;
    gap: 16px;
}

/* Visual Hero */
.hero-visual {
    display: flex;
    justify-content: center;
    align-items: center;
}

.tech-card {
    background: var(--bg-alt);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 30px;
    width: 100%;
    max-width: 320px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    box-shadow: var(--shadow-sm);
}

.tech-item {
    background: #ffffff;
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 16px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    transition: var(--transition);
}

.tech-item:hover {
    border-color: var(--accent);
    box-shadow: var(--shadow-sm);
    transform: translateY(-2px);
}

.tech-item i {
    width: 24px;
    height: 24px;
    color: var(--accent);
}

.tech-item span {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--text-secondary);
}

/* ── ABOUT SECTION ── */
.about {
    max-width: 1100px;
    margin: 80px auto;
    padding: 0 24px;
}

.about-grid {
    display: grid;
    grid-template-columns: 1.1fr 0.9fr;
    gap: 64px;
    align-items: start;
}

.about-text p {
    color: var(--text-secondary);
    font-size: 0.975rem;
    margin-bottom: 20px;
    line-height: 1.6;
}

.about-highlights {
    background: var(--bg-alt);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 32px;
    box-shadow: var(--shadow-sm);
}

.about-highlights h3 {
    font-size: 1.15rem;
    margin-bottom: 20px;
    font-weight: 700;
}

.highlight-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.highlight-list li {
    display: flex;
    gap: 12px;
    align-items: flex-start;
}

.icon-accent {
    color: var(--accent);
    flex-shrink: 0;
    margin-top: 2px;
    width: 18px;
    height: 18px;
}

.highlight-list strong {
    color: var(--text-primary);
    display: block;
    font-size: 0.9rem;
    margin-bottom: 2px;
}

.highlight-list div {
    color: var(--text-secondary);
    font-size: 0.875rem;
    line-height: 1.5;
}

/* ── SKILLS SECTION ── */
.skills {
    max-width: 1100px;
    margin: 80px auto;
    padding: 0 24px;
}

.skills-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
}

.skill-category {
    background: #ffffff;
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 32px;
    box-shadow: var(--shadow-sm);
}

.skill-category h3 {
    font-size: 1.15rem;
    margin-bottom: 24px;
    font-weight: 700;
}

.skill-item {
    margin-bottom: 20px;
}

.skill-item:last-child {
    margin-bottom: 0;
}

.skill-info {
    display: flex;
    justify-content: space-between;
    font-size: 0.85rem;
    color: var(--text-primary);
    margin-bottom: 6px;
    font-weight: 500;
}

.skill-bar {
    height: 6px;
    background: var(--bg-alt);
    border-radius: 3px;
    overflow: hidden;
}

.skill-progress {
    height: 100%;
    border-radius: 3px;
    background-color: var(--accent);
}

/* ── PROJECTS SECTION ── */
.projects {
    max-width: 1100px;
    margin: 80px auto;
    padding: 0 24px;
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 24px;
}

.project-card {
    background: #ffffff;
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 32px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    transition: var(--transition);
    box-shadow: var(--shadow-sm);
}

.project-card:hover {
    transform: translateY(-2px);
    border-color: var(--border-hover);
    box-shadow: var(--shadow-md);
}

.project-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.project-icon {
    width: 32px;
    height: 32px;
    color: var(--accent);
}

.project-links a {
    color: var(--text-secondary);
    transition: var(--transition);
}

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

.project-title {
    font-size: 1.2rem;
    font-weight: 700;
    margin-bottom: 12px;
}

.project-desc {
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.55;
    margin-bottom: 24px;
    flex-grow: 1;
}

.project-tech {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.project-tech span {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--text-secondary);
    background: var(--bg-alt);
    padding: 3px 8px;
    border-radius: 4px;
    border: 1px solid var(--border);
}

/* ── CONTACT SECTION ── */
.contact {
    max-width: 1100px;
    margin: 80px auto 100px auto;
    padding: 0 24px;
}

.contact-card {
    background: var(--bg-alt);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 48px;
    display: grid;
    grid-template-columns: 1fr 1.1fr;
    gap: 48px;
    align-items: center;
    box-shadow: var(--shadow-sm);
}

.contact-title {
    font-size: 2rem;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 16px;
    letter-spacing: -0.5px;
}

.contact-desc {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.contact-methods {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.contact-method {
    display: flex;
    align-items: center;
    gap: 16px;
    background: #ffffff;
    border: 1px solid var(--border);
    padding: 16px 20px;
    border-radius: 8px;
    text-decoration: none;
    color: var(--text-primary);
    transition: var(--transition);
    box-shadow: var(--shadow-sm);
}

.contact-method:hover {
    border-color: var(--accent);
    transform: translateX(3px);
}

.contact-method i {
    width: 20px;
    height: 20px;
    color: var(--accent);
}

.contact-method h4 {
    font-size: 0.8rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.contact-method span {
    font-size: 0.95rem;
    font-weight: 600;
}

/* ── FOOTER ── */
footer {
    border-top: 1px solid var(--border);
    padding: 32px 0;
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.85rem;
    background: var(--bg-alt);
}

/* ── RESPONSIVE DESIGN (MEDIA QUERIES) ── */
@media (max-width: 1024px) {
    .navbar {
        padding: 0 5%;
    }
    .hero {
        grid-template-columns: 1fr;
        text-align: center;
        padding-top: 120px;
        gap: 32px;
    }
    .hero-content {
        align-items: center;
    }
    .hero-title {
        font-size: 2.75rem;
    }
    .hero-visual {
        margin-top: 12px;
    }
    .about-grid {
        grid-template-columns: 1fr;
        gap: 32px;
    }
    .contact-card {
        grid-template-columns: 1fr;
        padding: 32px;
        gap: 32px;
    }
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
        flex-direction: column;
        position: absolute;
        top: 70px;
        left: 0;
        width: 100%;
        background: #ffffff;
        border-bottom: 1px solid var(--border);
        padding: 24px;
        gap: 16px;
        align-items: center;
        box-shadow: var(--shadow-md);
    }
    .nav-links.open {
        display: flex;
    }
    .nav-toggle {
        display: block;
    }
    .hero-title {
        font-size: 2.25rem;
    }
    .skills-grid,
    .projects-grid {
        grid-template-columns: 1fr;
    }
    .section-title {
        font-size: 1.5rem;
    }
    .contact-title {
        font-size: 1.75rem;
    }
}