/**
 * carlosvaccaro.com.ar - Estilos principales
 * Diseño profesional "Profesional con alma técnica"
 * Paleta: azul marino + gris, responsive, tipografía del sistema
 */

/* ============================================================
   RESET & BASE
   ============================================================ */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    -webkit-text-size-adjust: 100%;
    scroll-behavior: smooth;
}

body {
    font-family: "Segoe UI", system-ui, -apple-system, BlinkMacSystemFont,
                 "Helvetica Neue", Arial, sans-serif;
    font-size: 1rem;
    line-height: 1.6;
    color: #e8ecf1;
    background: linear-gradient(135deg, #0a1628 0%, #1a2a4a 50%, #0f1d35 100%);
    background-attachment: fixed;
    min-height: 100vh;
    overflow-x: hidden;
}

a {
    text-decoration: none;
    color: inherit;
    transition: color 0.2s ease, background-color 0.2s ease;
}

/* ============================================================
   PATRÓN GEOMÉTRICO DE FONDO
   ============================================================ */
.bg-pattern {
    position: fixed;
    inset: 0;
    opacity: 0.03;
    pointer-events: none;
    z-index: 0;
    background-image: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='1'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
}

/* ============================================================
   HEADER / HERO
   ============================================================ */
.hero {
    position: relative;
    z-index: 1;
    padding: 3rem 1.5rem 2rem;
    text-align: center;
    border-bottom: 1px solid rgba(100, 149, 237, 0.12);
}

.hero-inner {
    max-width: 720px;
    margin: 0 auto;
}

.hero h1 {
    font-size: clamp(1.8rem, 4vw, 2.8rem);
    font-weight: 700;
    margin: 0 0 0.3rem;
    letter-spacing: -0.02em;
    background: linear-gradient(90deg, #e8ecf1 0%, #87CEEB 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: clamp(0.95rem, 2vw, 1.15rem);
    color: #87CEEB;
    margin: 0 0 1.5rem;
    font-weight: 400;
    letter-spacing: 0.05em;
    text-transform: uppercase;
}

.hero-desc {
    font-size: clamp(0.9rem, 1.8vw, 1.05rem);
    color: #a0b4cc;
    max-width: 560px;
    margin: 0 auto 1.8rem;
    line-height: 1.7;
}

.hero-desc-accent {
    color: #6a8caf;
    font-size: 0.9em;
}

/* ============================================================
   BOTÓN DE CONTACTO
   ============================================================ */
.btn-contact {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: linear-gradient(135deg, #1e5aa8 0%, #2a7cc7 100%);
    color: #fff;
    padding: 0.7rem 1.6rem;
    border-radius: 8px;
    font-size: 0.95rem;
    font-weight: 500;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    box-shadow: 0 4px 15px rgba(42, 124, 199, 0.3);
}

.btn-contact:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(42, 124, 199, 0.4);
}

.btn-contact .icon {
    flex-shrink: 0;
}

/* ============================================================
   TOOLTIP
   ============================================================ */
#tooltip {
    position: fixed;
    display: none;
    background: #1a3a5c;
    color: #c8d8ec;
    padding: 0.6rem 1rem;
    border-radius: 6px;
    font-size: 0.85rem;
    max-width: 260px;
    border: 1px solid rgba(100, 149, 237, 0.3);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
    z-index: 1000;
    pointer-events: none;
    line-height: 1.4;
}

/* ============================================================
   CATEGORÍAS / GRID DE TARJETAS
   ============================================================ */
.categories {
    position: relative;
    z-index: 1;
    padding: 2rem 1rem 3rem;
    max-width: 1100px;
    margin: 0 auto;
}

.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.2rem;
}

/* ============================================================
   TARJETA BASE
   ============================================================ */
.card {
    background: linear-gradient(145deg, rgba(20, 40, 70, 0.8) 0%, rgba(15, 30, 55, 0.9) 100%);
    border: 1px solid rgba(100, 149, 237, 0.12);
    border-radius: 14px;
    padding: 1.5rem;
    transition: border-color 0.35s ease, transform 0.35s ease, box-shadow 0.35s ease;
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.card:hover {
    border-color: rgba(100, 149, 237, 0.4);
    transform: translateY(-4px);
    box-shadow: 0 12px 30px rgba(0, 0, 0, 0.3);
}

.card-header {
    display: flex;
    align-items: center;
    gap: 0.8rem;
    margin-bottom: 1rem;
}

.card-icon {
    width: 44px;
    height: 44px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.card-icon svg {
    flex-shrink: 0;
}

.card h2 {
    font-size: 1.15rem;
    font-weight: 600;
    margin: 0;
    color: #c8d8ec;
}

.card-desc {
    font-size: 0.85rem;
    color: #7a9ab8;
    margin: 0 0 1rem;
    line-height: 1.5;
}

/* ============================================================
   TAGS / ENLACES INTERNOS DE CADA TARJETA
   ============================================================ */
.card-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem;
}

.card-tags a {
    display: inline-block;
    padding: 0.35rem 0.7rem;
    border-radius: 20px;
    font-size: 0.78rem;
    border: 1px solid;
    transition: background-color 0.2s ease;
}

/* ============================================================
   VARIANTES DE COLOR POR CATEGORÍA
   ============================================================ */

/* Azul - Derecho & Letras */
.card-azul .card-icon {
    background: linear-gradient(135deg, #2a5a8a 0%, #1e4a7a 100%);
    color: #87CEEB;
}
.card-azul .card-tags a {
    background: rgba(42, 90, 138, 0.25);
    color: #87CEEB;
    border-color: rgba(42, 90, 138, 0.3);
}
.card-azul .card-tags a:hover {
    background: rgba(42, 90, 138, 0.45);
}

/* Rosa - Arte & Diseño */
.card-rosa .card-icon {
    background: linear-gradient(135deg, #8a4a6a 0%, #6a3a5a 100%);
    color: #d4a5c0;
}
.card-rosa .card-tags a {
    background: rgba(138, 74, 106, 0.25);
    color: #d4a5c0;
    border-color: rgba(138, 74, 106, 0.3);
}
.card-rosa .card-tags a:hover {
    background: rgba(138, 74, 106, 0.45);
}

/* Verde - Electrónica & IoT */
.card-verde .card-icon {
    background: linear-gradient(135deg, #2a7a5a 0%, #1e5a40 100%);
    color: #7dd8a8;
}
.card-verde .card-tags a {
    background: rgba(42, 122, 90, 0.25);
    color: #7dd8a8;
    border-color: rgba(42, 122, 90, 0.3);
}
.card-verde .card-tags a:hover {
    background: rgba(42, 122, 90, 0.45);
}

/* Violeta - Programación & Sistemas */
.card-violeta .card-icon {
    background: linear-gradient(135deg, #5a5a8a 0%, #3a3a6a 100%);
    color: #b0b0d8;
}
.card-violeta .card-tags a {
    background: rgba(90, 90, 138, 0.25);
    color: #b0b0d8;
    border-color: rgba(90, 90, 138, 0.3);
}
.card-violeta .card-tags a:hover {
    background: rgba(90, 90, 138, 0.45);
}

/* Ámbar - Cámaras en Vivo */
.card-amb .card-icon {
    background: linear-gradient(135deg, #8a6a2a 0%, #6a4a1a 100%);
    color: #e8c87a;
}
.card-amb .card-tags a {
    background: rgba(138, 106, 42, 0.25);
    color: #e8c87a;
    border-color: rgba(138, 106, 42, 0.3);
}
.card-amb .card-tags a:hover {
    background: rgba(138, 106, 42, 0.45);
}

/* Oro - Certificados */
.card-oro .card-icon {
    background: linear-gradient(135deg, #8a7a3a 0%, #6a5a2a 100%);
    color: #e8d87a;
}
.card-oro .card-tags a {
    background: rgba(138, 122, 58, 0.25);
    color: #e8d87a;
    border-color: rgba(138, 122, 58, 0.3);
}
.card-oro .card-tags a:hover {
    background: rgba(138, 122, 58, 0.45);
}

/* ============================================================
   FOOTER
   ============================================================ */
.footer {
    position: relative;
    z-index: 1;
    border-top: 1px solid rgba(100, 149, 237, 0.1);
    padding: 2rem 1.5rem;
    text-align: center;
    background: rgba(10, 22, 40, 0.5);
}

.footer-inner {
    max-width: 720px;
    margin: 0 auto;
}

.visit-counter {
    margin-bottom: 1.5rem;
}

.counter-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    background: rgba(20, 40, 70, 0.6);
    border: 1px solid rgba(100, 149, 237, 0.15);
    border-radius: 8px;
    padding: 0.6rem 1.2rem;
    font-size: 0.9rem;
    color: #87CEEB;
}

.counter-badge strong {
    color: #e8ecf1;
    font-size: 1.1em;
    margin-left: 0.3rem;
}

.license {
    margin-bottom: 1rem;
}

.license-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    color: #7a9ab8;
    font-size: 0.8rem;
    transition: color 0.2s ease;
}

.license-link:hover {
    color: #87CEEB;
}

.update-date {
    font-size: 0.75rem;
    color: #4a5a70;
    margin: 0;
}

/* ============================================================
   ICONOS GENERALES
   ============================================================ */
.icon {
    flex-shrink: 0;
    vertical-align: middle;
}

/* ============================================================
   RESPONSIVE: MÓVIL
   ============================================================ */
@media (max-width: 480px) {
    .hero {
        padding: 2rem 1rem 1.5rem;
    }

    .hero h1 {
        font-size: 1.6rem;
    }

    .btn-contact {
        padding: 0.6rem 1.2rem;
        font-size: 0.9rem;
    }

    .categories {
        padding: 1.5rem 0.75rem 2rem;
    }

    .grid {
        grid-template-columns: 1fr;
        gap: 1rem;
    }

    .card {
        padding: 1.2rem;
    }

    .card h2 {
        font-size: 1.05rem;
    }

    .card-tags a {
        font-size: 0.75rem;
        padding: 0.3rem 0.6rem;
    }

    .footer {
        padding: 1.5rem 1rem;
    }

    .counter-badge {
        padding: 0.5rem 1rem;
        font-size: 0.85rem;
    }
}

/* ============================================================
   RESPONSIVE: TABLET
   ============================================================ */
@media (min-width: 481px) and (max-width: 768px) {
    .grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

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

/* ============================================================
   FOCUS VISIBLE (accesibilidad)
   ============================================================ */
a:focus-visible,
button:focus-visible {
    outline: 2px solid #87CEEB;
    outline-offset: 2px;
}