/* =========================================================
   HEADER — DESKTOP
   ========================================================= */
.header {
    position: fixed; top: 0; left: 0; right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    border-bottom: 1px solid transparent;
    transition: all 0.3s ease;
}
.header.scrolled {
    border-bottom-color: var(--gray-light);
    box-shadow: 0 2px 12px rgba(15, 23, 42, 0.05);
    background: rgba(255, 255, 255, 0.95);
}
.header-inner {
    display: flex; align-items: center; justify-content: space-between;
    padding: 16px 24px;
    max-width: 1180px; margin: 0 auto;
}
.logo {
    display: flex; align-items: center; gap: 10px;
    font-weight: 800; font-size: 18px;
    letter-spacing: -0.02em;
    color: var(--dark);
}
.logo i { color: var(--indigo); font-size: 22px; }
.logo span { color: var(--indigo); }

.nav {
    display: flex; gap: 28px; align-items: center;
}
.nav a {
    font-size: 14px; font-weight: 500;
    color: var(--dark-2);
    transition: color 0.2s ease;
    position: relative;
}
.nav a:hover { color: var(--indigo); }
.nav a::after {
    content: ''; position: absolute; bottom: -6px; left: 0; right: 0;
    height: 2px; background: var(--indigo);
    transform: scaleX(0); transition: transform 0.25s ease;
    transform-origin: left;
}
.nav a:hover::after { transform: scaleX(1); }
.nav-cta {
    background: var(--indigo); color: #fff !important;
    padding: 9px 20px; border-radius: 100px;
    font-size: 13px; font-weight: 600;
    transition: all 0.25s ease;
}
.nav-cta::after { display: none; }
.nav-cta:hover { background: var(--indigo-dark); transform: translateY(-1px); }

.menu-toggle {
    display: none;
    background: none; border: none;
    font-size: 22px; color: var(--dark);
    cursor: pointer;
    padding: 6px;
    line-height: 1;
    transition: color 0.2s ease;
}
.menu-toggle:hover { color: var(--indigo); }

/* =========================================================
   TABLET (≤ 900px)
   ========================================================= */
@media (max-width: 900px) {
    .header-inner { padding: 14px 20px; }
    .nav { gap: 20px; }
    .nav a { font-size: 13px; }
}

/* =========================================================
   MÓVIL (≤ 640px)
   ========================================================= */
@media (max-width: 640px) {
    .header-inner { padding: 14px 18px; }
    .logo { font-size: 16px; }
    .logo i { font-size: 19px; }

    .menu-toggle { display: block; }

    .nav {
        position: fixed;
        top: 58px; left: 0; right: 0;
        flex-direction: column;
        align-items: stretch;
        gap: 0;
        background: #fff;
        border-bottom: 1px solid var(--gray-light);
        padding: 12px 0;
        box-shadow: 0 8px 24px rgba(15, 23, 42, 0.08);
        transform: translateY(-10px);
        opacity: 0;
        pointer-events: none;
        transition: all 0.25s ease;
    }
    .nav.open {
        transform: translateY(0);
        opacity: 1;
        pointer-events: auto;
    }
    .nav a {
        font-size: 15px;
        padding: 14px 22px;
        border-bottom: 1px solid #f1f5f9;
    }
    .nav a:last-child { border-bottom: none; }
    .nav a::after { display: none; }
    .nav-cta {
        margin: 12px 22px 6px;
        text-align: center;
        padding: 12px 20px;
        font-size: 14px;
    }
}