/* ========================================
   TOPBAR STYLES - BFunded Academy
   Optimizado para móvil y PC
======================================== */

/* Variables específicas del topbar */
:root {
    --topbar-height: 70px;
    --topbar-bg: rgba(10, 14, 39, 0.95);
    --topbar-bg-solid: rgba(10, 14, 39, 1);
    --topbar-text: #e2e8f0;
    --topbar-text-hover: #00D9FF;
    --topbar-accent: linear-gradient(135deg, #00D9FF 0%, #00FF88 100%);
    --topbar-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
    --topbar-border: rgba(255, 255, 255, 0.1);
    --mobile-breakpoint: 768px;
}

/* ========================================
   NAVBAR PRINCIPAL
======================================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    width: 100%;
    height: var(--topbar-height);
    background: var(--topbar-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--topbar-border);
    box-shadow: var(--topbar-shadow);
    z-index: 1000;
    transition: all 0.3s ease;
}

/* Efecto de scroll */
.navbar.scrolled {
    background: var(--topbar-bg-solid);
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.2);
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

/* ========================================
   LOGO/BRAND
======================================== */
.nav-brand {
    display: flex;
    align-items: center;
    z-index: 1001;
}

.nav-brand h2 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--topbar-text);
    margin: 0;
    transition: all 0.3s ease;
}

.nav-brand .accent {
    background: var(--topbar-accent);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    background-size: 200% 200%;
    animation: gradient-shift 3s ease infinite;
}

@keyframes gradient-shift {
    0%, 100% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
}

/* ========================================
   MENÚ DE ESCRITORIO
======================================== */
.nav-menu {
    display: flex;
    list-style: none;
    margin: 0;
    padding: 0;
    gap: 2rem;
    align-items: center;
}

.nav-menu li {
    position: relative;
}

/* Dropdown */
.nav-menu .dropdown {
    position: relative;
}

.nav-menu .dropdown-toggle {
    display: flex;
    align-items: center;
    gap: 0.35rem;
    cursor: pointer;
}

.dropdown-icon {
    transition: transform 0.3s ease;
}

.dropdown:hover .dropdown-icon {
    transform: rotate(180deg);
}

.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    background: var(--topbar-bg-solid);
    border: 1px solid var(--topbar-border);
    border-radius: 10px;
    padding: 0.75rem 0;
    margin-top: 0.25rem;
    min-width: 240px;
    opacity: 0;
    visibility: hidden;
    display: none;
    transform: translateY(-10px);
    transition: all 0.3s ease;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.3);
    list-style: none;
    z-index: 1000;
}

/* Área invisible para mantener el hover */
.dropdown-menu::before {
    content: '';
    position: absolute;
    top: -10px;
    left: 0;
    right: 0;
    height: 10px;
    background: transparent;
}

.dropdown:hover .dropdown-menu {
    display: block;
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.dropdown-menu li {
    width: 100%;
}

.dropdown-item a {
    display: block;
    padding: 0.875rem 1.5rem !important;
    color: var(--topbar-text);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.925rem;
    transition: all 0.3s ease;
    border-left: 3px solid transparent;
    position: relative;
}

.dropdown-item a:hover {
    background: rgba(0, 217, 255, 0.1);
    color: var(--topbar-text-hover);
    border-left-color: var(--topbar-text-hover);
    padding-left: 1.75rem !important;
}

/* Separador entre elementos del dropdown */
.dropdown-item:not(:last-child) {
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

/* Estilos generales para enlaces del dropdown (fallback) */
.dropdown-menu a {
    display: block;
    padding: 0.875rem 1.5rem;
    color: var(--topbar-text);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.925rem;
    transition: all 0.3s ease;
    border-left: 3px solid transparent;
    position: relative;
}

.dropdown-menu a:hover {
    background: rgba(0, 217, 255, 0.1);
    color: var(--topbar-text-hover);
    border-left-color: var(--topbar-text-hover);
}

.dropdown-menu a::after {
    display: none;
}

.nav-menu a {
    color: var(--topbar-text);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.95rem;
    padding: 0.5rem 0;
    position: relative;
    transition: all 0.3s ease;
    display: block;
}

.nav-menu a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--topbar-accent);
    transition: width 0.3s ease;
}

.nav-menu a:hover::after,
.nav-menu a.active::after {
    width: 100%;
}

.nav-menu a:hover {
    color: var(--topbar-text-hover);
    transform: translateY(-1px);
}

.nav-menu a.active {
    color: var(--topbar-text-hover);
    font-weight: 600;
}

/* Botones especiales */
.nav-menu .login-link,
.nav-menu .logout-link {
    padding: 0.5rem 1rem;
    border-radius: 6px;
    transition: all 0.3s ease;
}

.nav-menu .login-link:hover {
    background: rgba(0, 217, 255, 0.1);
    color: var(--topbar-text-hover);
}

.nav-menu .logout-link:hover {
    background: rgba(239, 68, 68, 0.1);
    color: #ef4444;
}

.nav-menu .btn-primary-nav {
    background: var(--topbar-accent);
    color: white !important;
    padding: 0.5rem 1.2rem;
    border-radius: 8px;
    font-weight: 600;
    box-shadow: 0 2px 10px rgba(0, 217, 255, 0.3);
    transition: all 0.3s ease;
}

.nav-menu .btn-primary-nav:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 20px rgba(0, 217, 255, 0.4);
    color: white !important;
}

.nav-menu .btn-primary-nav::after {
    display: none;
}

/* ========================================
   BOTÓN MENÚ MÓVIL
======================================== */
.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    color: var(--topbar-text);
    cursor: pointer;
    padding: 0.5rem;
    border-radius: 6px;
    transition: all 0.3s ease;
    z-index: 1001;
}

.mobile-menu-btn:hover {
    background: rgba(255, 255, 255, 0.1);
    color: var(--topbar-text-hover);
}

.mobile-menu-btn svg {
    width: 24px;
    height: 24px;
    transition: transform 0.3s ease;
}

.mobile-menu-btn.active svg {
    transform: rotate(90deg);
}

/* ========================================
   MENÚ MÓVIL
======================================== */
.mobile-menu {
    position: fixed;
    top: var(--topbar-height);
    left: 0;
    right: 0;
    background: var(--topbar-bg-solid);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--topbar-border);
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.2);
    transform: translateY(-100%);
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    z-index: 999;
    max-height: calc(100vh - var(--topbar-height));
    overflow-y: auto;
}

.mobile-menu.active {
    transform: translateY(0) !important;
    opacity: 1 !important;
    visibility: visible !important;
}

.mobile-menu ul {
    list-style: none;
    margin: 0;
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.mobile-menu li {
    width: 100%;
}

.mobile-menu a {
    display: block;
    color: var(--topbar-text);
    text-decoration: none;
    font-weight: 500;
    padding: 1rem 1.5rem;
    border-radius: 8px;
    transition: all 0.3s ease;
    border: 1px solid transparent;
}

.mobile-menu a:hover,
.mobile-menu a.active {
    background: rgba(0, 217, 255, 0.1);
    color: var(--topbar-text-hover);
    border-color: rgba(0, 217, 255, 0.2);
    transform: translateX(5px);
}

.mobile-menu .btn-primary-nav {
    background: var(--topbar-accent);
    color: white !important;
    text-align: center;
    font-weight: 600;
    margin-top: 0.5rem;
    box-shadow: 0 2px 10px rgba(0, 217, 255, 0.3);
}

.mobile-menu .btn-primary-nav:hover {
    transform: translateX(5px) translateY(-2px);
    box-shadow: 0 4px 20px rgba(0, 217, 255, 0.4);
    color: white !important;
}

/* Dropdown móvil */
.mobile-dropdown {
    width: 100%;
}

.mobile-dropdown-toggle {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    position: relative;
}

.mobile-dropdown-toggle::after {
    content: '›';
    font-size: 1.5rem;
    transition: transform 0.3s ease;
    display: inline-block;
}

.mobile-dropdown.active .mobile-dropdown-toggle::after {
    transform: rotate(90deg);
}

.mobile-dropdown-menu {
    list-style: none;
    padding-left: 1.5rem;
    margin: 0.5rem 0 0 0;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
    display: none;
}

.mobile-dropdown.active .mobile-dropdown-menu {
    display: block;
    max-height: 300px;
}

.mobile-dropdown-menu li {
    margin: 0.25rem 0;
}

.mobile-dropdown-menu a {
    padding: 0.75rem 1rem;
    font-size: 0.9rem;
    color: var(--topbar-text-secondary);
    border-left: 2px solid rgba(0, 217, 255, 0.3);
}

.mobile-dropdown-menu a:hover {
    color: var(--topbar-text-hover);
    background: rgba(0, 217, 255, 0.05);
    border-left-color: var(--topbar-text-hover);
}

/* ========================================
   RESPONSIVE DESIGN
======================================== */

/* Tablet */
@media (max-width: 1024px) {
    .navbar .container {
        padding: 0 1rem;
    }
    
    .nav-menu {
        gap: 1.5rem;
    }
    
    .nav-menu a {
        font-size: 0.9rem;
    }
}

/* Móvil */
@media (max-width: 768px) {
    .navbar {
        height: 60px;
    }
    
    .navbar .container {
        padding: 0 1rem;
    }
    
    .nav-brand h2 {
        font-size: 1.3rem;
    }
    
    .nav-menu {
        display: none;
    }
    
    .mobile-menu-btn {
        display: block;
    }
    
    .mobile-menu {
        top: 60px;
    }
}

/* Móvil pequeño */
@media (max-width: 480px) {
    .navbar .container {
        padding: 0 0.75rem;
    }
    
    .nav-brand h2 {
        font-size: 1.2rem;
    }
    
    .mobile-menu {
        padding: 1rem;
    }
    
    .mobile-menu a {
        padding: 0.875rem 1rem;
        font-size: 0.9rem;
    }
}

/* ========================================
   ANIMACIONES Y TRANSICIONES
======================================== */

/* Animación de entrada del menú móvil */
@keyframes slideDown {
    from {
        transform: translateY(-100%);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

.mobile-menu.active {
    animation: slideDown 0.3s ease-out;
}

/* Efecto de hover en elementos del menú */
.nav-menu a,
.mobile-menu a {
    position: relative;
    overflow: hidden;
}

.nav-menu a::before,
.mobile-menu a::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.1), transparent);
    transition: left 0.5s ease;
}

.nav-menu a:hover::before,
.mobile-menu a:hover::before {
    left: 100%;
}

/* ========================================
   ACCESIBILIDAD
======================================== */

/* Focus visible para navegación por teclado */
.nav-menu a:focus-visible,
.mobile-menu a:focus-visible,
.mobile-menu-btn:focus-visible {
    outline: 2px solid var(--topbar-text-hover);
    outline-offset: 2px;
    border-radius: 4px;
}

/* Reducir animaciones para usuarios que lo prefieren */
@media (prefers-reduced-motion: reduce) {
    .navbar,
    .nav-menu a,
    .mobile-menu,
    .mobile-menu-btn,
    .nav-brand .accent {
        transition: none;
        animation: none;
    }
}

/* ========================================
   UTILIDADES
======================================== */

/* Espaciado para contenido principal */
body {
    padding-top: 70px;
}

@media (max-width: 768px) {
    body {
        padding-top: 60px;
    }
}

/* Overlay para menú móvil abierto */
.mobile-menu-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 998;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
}

.mobile-menu-overlay.active {
    opacity: 1;
    visibility: visible;
}