:root {
    --bg-primary: #ffffff;
    --bg-secondary: #f8f9fa;
    --card-bg: #ffffff;
    --text-primary: #0a2540;
    --text-secondary: #4a5568;
    --accent-emerald: #00a676;
    --accent-navy: #0f172a;
    --glass-bg: rgba(255, 255, 255, 0.85);
    --glass-border: rgba(0, 0, 0, 0.05);
}

[data-theme="dark"] {
    --bg-primary: #0b1120;
    --bg-secondary: #111827;
    --card-bg: #1e293b;
    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --accent-emerald: #10b981;
    --accent-navy: #f8fafc;
    --glass-bg: rgba(11, 17, 32, 0.85);
    --glass-border: rgba(255, 255, 255, 0.08);
}

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

body {
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

html {
    scroll-behavior: smooth;
}

/* Accessibility Focus Ring */
a:focus-visible, button:focus-visible {
    outline: 2px solid var(--accent-emerald);
    outline-offset: 4px;
    border-radius: 4px;
}

/* Navbar */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: var(--glass-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--glass-border);
    z-index: 1000;
    padding: 1rem 0;
}

.nav-content {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 clamp(1rem, 3vw, 2rem);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-weight: 700;
    font-size: clamp(1.1rem, 2vw, 1.25rem);
    color: var(--accent-navy);
    letter-spacing: -0.5px;
}

.lang-switcher {
    display: flex;
    gap: 0.5rem;
    background: rgba(0,0,0,0.03);
    padding: 0.25rem;
    border-radius: 8px;
    align-items: center;
}

[data-theme="dark"] .lang-switcher {
    background: rgba(255,255,255,0.05);
}

.theme-btn {
    background: transparent;
    border: none;
    cursor: pointer;
    font-size: clamp(1rem, 1.5vw, 1.1rem);
    padding: 0 0.25rem;
    transition: transform 0.2s;
    display: flex;
    align-items: center;
}
.theme-btn:hover {
    transform: scale(1.1);
}

.lang-btn {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    padding: clamp(0.25rem, 1vw, 0.35rem) clamp(0.5rem, 1.5vw, 0.75rem);
    border-radius: 6px;
    cursor: pointer;
    font-weight: 600;
    font-size: clamp(0.8rem, 1.5vw, 0.85rem);
    transition: all 0.2s ease;
}

.lang-btn:hover {
    color: var(--accent-navy);
}

.lang-btn.active {
    background: var(--card-bg);
    color: var(--accent-emerald);
    box-shadow: 0 2px 4px rgba(0,0,0,0.05);
}

/* Main Content */
main {
    padding-top: 80px; 
}

.section {
    max-width: 1100px;
    margin: 0 auto;
    padding: clamp(3.5rem, 8vw, 6rem) clamp(1.5rem, 4vw, 2rem);
}

.bg-light {
    background-color: var(--bg-secondary);
    max-width: 100%;
}

.bg-light > div, .bg-light > h3 {
    max-width: 1100px;
    margin-left: auto;
    margin-right: auto;
}

.section-title {
    font-size: clamp(1.75rem, 4vw, 2.25rem);
    font-weight: 800;
    margin-bottom: clamp(2rem, 5vw, 3rem);
    color: var(--accent-navy);
    text-align: center;
    letter-spacing: -0.5px;
}

/* Hero Section */
.hero {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: clamp(2rem, 5vw, 4rem);
    min-height: auto;
    padding: clamp(2rem, 5vw, 4rem) clamp(1.5rem, 4vw, 2rem);
    max-width: 1100px;
    margin: 0 auto;
}

@media (min-width: 769px) {
    .hero {
        min-height: 85vh;
    }
}

.hero-content {
    flex: 1.2;
}

.hero-content h1 {
    font-size: clamp(2.25rem, 5vw, 3.5rem);
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: clamp(0.5rem, 2vw, 1rem);
    color: var(--accent-navy);
    letter-spacing: -1px;
}

.hero-content h2 {
    font-size: clamp(1.15rem, 2.5vw, 1.5rem);
    font-weight: 500;
    color: var(--accent-emerald);
    margin-bottom: clamp(1rem, 2.5vw, 1.5rem);
}

.hero-content p {
    font-size: clamp(1rem, 2vw, 1.125rem);
    color: var(--text-secondary);
    margin-bottom: clamp(1.5rem, 4vw, 2.5rem);
    max-width: 500px;
}

.hero-actions {
    display: flex;
    gap: 1rem;
}

.btn {
    display: inline-block;
    padding: clamp(0.875rem, 2vw, 1rem) clamp(1.5rem, 3vw, 1.75rem);
    border-radius: 8px;
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    transition: all 0.5s cubic-bezier(0.16, 1, 0.3, 1);
}

.btn-primary {
    background-color: var(--accent-emerald);
    color: white;
    box-shadow: 0 4px 14px rgba(0, 166, 118, 0.25);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 166, 118, 0.4);
    background-color: #00956a;
}

.btn-secondary {
    background-color: transparent;
    color: var(--accent-navy);
    border: 2px solid rgba(15, 23, 42, 0.1);
}

.btn-secondary:hover {
    border-color: var(--accent-navy);
    background-color: rgba(15, 23, 42, 0.03);
}

.hero-image {
    flex: 1;
    display: flex;
    justify-content: center;
}

.hero-image img {
    width: 100%;
    max-width: clamp(250px, 40vw, 420px);
    object-fit: cover;
    border-radius: 24px;
    box-shadow: 0 24px 48px rgba(0, 0, 0, 0.08);
    transition: transform 0.5s ease;
}

.hero-image img:hover {
    transform: scale(1.02) translateY(-10px);
}

/* Cards Grid */
.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: clamp(1.25rem, 3vw, 2rem);
}

.card {
    background: var(--card-bg);
    padding: clamp(1.5rem, 3.5vw, 2.5rem) clamp(1.5rem, 3vw, 2rem);
    border-radius: 20px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.02);
    border: 1px solid var(--glass-border);
    transition: all 0.5s cubic-bezier(0.16, 1, 0.3, 1);
}

.card:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.08);
    border-color: rgba(0, 166, 118, 0.3);
}

.card-icon {
    font-size: clamp(2rem, 4vw, 2.5rem);
    margin-bottom: clamp(1rem, 2.5vw, 1.5rem);
    background: var(--bg-secondary);
    width: clamp(48px, 8vw, 60px);
    height: clamp(48px, 8vw, 60px);
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 16px;
}

.card h4 {
    font-size: clamp(1.15rem, 2.5vw, 1.25rem);
    color: var(--accent-navy);
    margin-bottom: 0.75rem;
    font-weight: 700;
}

.card p {
    color: var(--text-secondary);
    font-size: clamp(0.95rem, 2vw, 1rem);
}

@media (min-width: 768px) {
    .span-2 {
        grid-column: span 2;
    }
}

/* Timeline */
.timeline {
    position: relative;
    max-width: 800px;
    margin: 0 auto;
}

.timeline::before {
    content: '';
    position: absolute;
    top: 0;
    left: 11px;
    height: 100%;
    width: 2px;
    background: rgba(0, 166, 118, 0.15);
}

.timeline-item {
    position: relative;
    padding-left: clamp(2.5rem, 5vw, 3.5rem);
    margin-bottom: clamp(2.5rem, 5vw, 3.5rem);
}

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

.timeline-dot {
    position: absolute;
    left: 0;
    top: 5px;
    width: 24px;
    height: 24px;
    background: var(--bg-primary);
    border: 4px solid var(--accent-emerald);
    border-radius: 50%;
    box-shadow: 0 0 0 6px rgba(0, 166, 118, 0.1);
    transition: all 0.3s ease;
}

.timeline-item:hover .timeline-dot {
    transform: scale(1.2);
    box-shadow: 0 0 0 8px rgba(0, 166, 118, 0.2);
}

.timeline-date {
    font-size: 0.85rem;
    font-weight: 700;
    color: var(--accent-emerald);
    text-transform: uppercase;
    letter-spacing: 1.5px;
    margin-bottom: 0.5rem;
    display: inline-block;
    background: rgba(0, 166, 118, 0.1);
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
}

.timeline-content h4 {
    font-size: clamp(1.15rem, 3vw, 1.5rem);
    color: var(--accent-navy);
    margin-bottom: 0.75rem;
    margin-top: 0.5rem;
}

.timeline-content p {
    color: var(--text-secondary);
    font-size: clamp(0.95rem, 2vw, 1.05rem);
}

/* Contact */
.contact-card {
    text-align: center;
    background: var(--card-bg);
    padding: clamp(3rem, 6vw, 4rem) clamp(1.5rem, 4vw, 2rem);
    border-radius: 24px;
    border: 1px solid var(--glass-border);
    max-width: 500px;
    margin: 0 auto;
    box-shadow: 0 10px 30px rgba(0,0,0,0.03);
    transition: transform 0.3s ease;
}

.contact-card:hover {
    transform: translateY(-5px);
}

.contact-link {
    font-size: clamp(1.1rem, 2.5vw, 1.25rem);
    font-weight: 600;
    color: var(--accent-navy);
    text-decoration: none;
    transition: color 0.2s;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.contact-link:hover {
    color: var(--accent-emerald);
}

footer {
    text-align: center;
    padding: 3rem 2rem;
    border-top: 1px solid var(--glass-border);
    color: var(--text-secondary);
    font-size: 0.875rem;
    background-color: var(--bg-primary);
}

/* Enlaces externos */
.external-link {
    color: var(--accent-navy);
    text-decoration: none;
    border-bottom: 1px dotted var(--accent-navy);
    transition: all 0.2s ease;
    display: inline-flex;
    align-items: center;
    gap: 4px;
}
.external-link:hover {
    color: var(--accent-blue);
    border-bottom-style: solid;
}
.external-link::after {
    content: "↗";
    font-size: 0.85em;
    opacity: 0.7;
}

/* Responsive Structural Overrides (Solo Layout, sin tipografías que ya son fluidas) */
@media (max-width: 768px) {
    .hero {
        flex-direction: column-reverse;
        text-align: center;
    }
    
    .hero-content p {
        margin-left: auto;
        margin-right: auto;
    }
    
    .hero-actions {
        flex-direction: column;
        width: 100%;
        gap: 0.75rem;
    }

    .btn {
        width: 100%;
        text-align: center;
    }

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

    .span-2 {
        grid-column: 1 !important;
    }
}

/* =========================================
   🚀 PREMIUM DESIGN INJECTIONS
   ========================================= */

/* Taste Skill: Background Orbs (Med-Tech Glassmorphism) */
.bg-orbs {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    z-index: -1;
    overflow: hidden;
    pointer-events: none;
}
.bg-orb-1 {
    position: absolute;
    top: -10%;
    left: -10%;
    width: 50vw;
    height: 50vw;
    background: radial-gradient(circle, rgba(16, 185, 129, 0.15) 0%, rgba(16, 185, 129, 0) 70%);
    filter: blur(120px);
}
.bg-orb-2 {
    position: absolute;
    bottom: -20%;
    right: -10%;
    width: 60vw;
    height: 60vw;
    background: radial-gradient(circle, rgba(15, 23, 42, 0.4) 0%, rgba(15, 23, 42, 0) 70%);
    filter: blur(120px);
}

/* Taste Skill: Glass Wrapper for Hero Image */
.glass-wrapper {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    padding: 16px;
    border-radius: 32px;
    box-shadow: 0 32px 64px rgba(0, 0, 0, 0.15);
}
.hero-image img {
    border-radius: 20px;
    box-shadow: none; /* Shadow moved to wrapper */
}

/* Emil Kowalski: Fade-Up Animations */
.reveal-hidden {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1), 
                transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}
.reveal-visible {
    opacity: 1;
    transform: translateY(0);
}

/* Kowalski: Physical Button Presses */
.btn:active, .card:active {
    transform: scale(0.96) !important;
}

/* ----------------------------------------- */

/* Print Styles (Optimización para PDFs y papel) */
/* Print Styles (Inteligencia A4) */
@media print {
    :root, [data-theme="dark"] {
        --bg-primary: #ffffff !important;
        --bg-secondary: #ffffff !important;
        --card-bg: #ffffff !important;
        --text-primary: #000000 !important;
        --text-secondary: #333333 !important;
        --accent-navy: #000000 !important;
        --accent-emerald: #000000 !important;
    }
    
    body {
        background: white !important;
        color: black !important;
        font-size: 11pt !important;
    }

    /* Ocultar interfaz web y decoraciones */
    .navbar, .hero-actions, .contact-card, .bg-orbs, .lang-switcher {
        display: none !important;
    }

    /* Resetear animaciones Kowalski para papel */
    .reveal-hidden, .reveal-visible {
        opacity: 1 !important;
        transform: none !important;
        transition: none !important;
    }

    /* Ajustar espacios para A4 */
    main {
        padding-top: 0 !important;
    }
    .section {
        padding: 0.5rem 0 !important;
    }
    
    /* Hero Section: Formato clásico de CV impreso */
    .hero {
        min-height: auto !important;
        padding: 0 !important;
        display: flex !important;
        flex-direction: row !important;
        justify-content: space-between !important;
        align-items: flex-start !important;
        border-bottom: 2px solid #000 !important;
        margin-bottom: 1rem !important;
        padding-bottom: 1rem !important;
    }
    .hero-image img {
        width: 120px !important;
        height: 120px !important;
        object-fit: cover !important;
        border-radius: 8px !important;
    }
    .glass-wrapper {
        border: none !important;
        box-shadow: none !important;
        padding: 0 !important;
        backdrop-filter: none !important;
    }

    /* Evitar cortes de página */
    .card, .timeline-item {
        page-break-inside: avoid;
        border: 1px solid #ddd !important;
        box-shadow: none !important;
        margin-bottom: 0.5rem !important;
    }

    /* URLs explícitas al imprimir */
    .external-link::after {
        content: " (" attr(href) ")" !important;
        font-size: 9pt !important;
        word-break: break-all;
    }
}