/* ============================================
   MENÚ DE NAVEGACIÓN - VITAGUARD HEROES
   ============================================ */

.main-navigation {
    position: relative;
    z-index: 10;
    margin-top: auto;
    padding: var(--spacing-xl) 0;
}

.nav-container {
    max-width: 1000px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-lg);
    align-items: center;
}

/* Botones de navegación */
.nav-btn {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-lg) var(--spacing-xl);
    background: #ffffff;
    backdrop-filter: blur(10px);
    border: 2px solid #078930;
    border-radius: var(--border-radius-xl);
    color: #078930;
    font-size: var(--font-size-lg);
    font-weight: 600;
    text-decoration: none;
    transition: var(--transition-normal);
    cursor: pointer;
    overflow: hidden;
    min-height: 70px;
    font-family: var(--font-family);
}

.nav-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(7,137,48,0.1), transparent);
    transition: var(--transition-slow);
}

.nav-btn:hover::before {
    left: 100%;
}

.nav-btn i {
    font-size: 1.5rem;
    transition: var(--transition-fast);
    color: #078930;
}

.nav-btn:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
    background: #078930;
    color: #ffffff;
}

.nav-btn:hover i {
    transform: scale(1.2);
    color: #ffffff;
}

.nav-btn:active {
    transform: translateY(-2px);
}

/* Botón principal (Comenzar Misión) */
.nav-btn.primary {
    background: #078930;
    color: #ffffff;
    border-color: #078930;
    box-shadow: var(--shadow-lg);
    position: relative;
    grid-column: 1 / -1;
    font-size: var(--font-size-xl);
    padding: var(--spacing-xl) var(--spacing-xxl);
    min-height: 80px;
}

.nav-btn.primary i {
    color: #ffffff;
}

.nav-btn.primary::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: #0a9e3f;
    border-radius: var(--border-radius-xl);
    z-index: -1;
    filter: blur(15px);
    opacity: 0.7;
    transition: var(--transition-normal);
}

.nav-btn.primary:hover::after {
    filter: blur(20px);
    opacity: 1;
}

.nav-btn.primary:hover {
    background: #0a9e3f;
    transform: translateY(-5px) scale(1.02);
}

.btn-glow {
    display: none;
}

/* Estilos específicos por tipo de botón */
.nav-btn#btn-register {
    border-color: var(--success-color);
}

.nav-btn#btn-register:hover {
    background: rgba(6, 214, 160, 0.2);
    border-color: var(--success-color);
    box-shadow: 0 0 20px rgba(6, 214, 160, 0.4);
}

.nav-btn#btn-login {
    border-color: var(--secondary-color);
}

.nav-btn#btn-login:hover {
    background: rgba(72, 202, 228, 0.2);
    border-color: var(--secondary-color);
    box-shadow: 0 0 20px rgba(72, 202, 228, 0.4);
}

.nav-btn#btn-leaderboard {
    border-color: var(--warning-color);
}

.nav-btn#btn-leaderboard:hover {
    background: rgba(255, 183, 3, 0.2);
    border-color: var(--warning-color);
    box-shadow: 0 0 20px rgba(255, 183, 3, 0.4);
}

.nav-btn#btn-info {
    border-color: var(--primary-color);
}

.nav-btn#btn-info:hover {
    background: rgba(44, 90, 160, 0.2);
    border-color: var(--primary-color);
    box-shadow: 0 0 20px rgba(44, 90, 160, 0.4);
}

.nav-btn#btn-settings {
    border-color: var(--text-secondary);
}

.nav-btn#btn-settings:hover {
    background: rgba(99, 110, 114, 0.2);
    border-color: var(--text-secondary);
    box-shadow: 0 0 20px rgba(99, 110, 114, 0.4);
}

/* ============================================
   FOOTER DEL JUEGO
   ============================================ */

.game-footer {
    position: relative;
    z-index: 10;
    margin-top: var(--spacing-xl);
    padding: var(--spacing-xl);
    background: #078930;
    backdrop-filter: blur(10px);
    border-radius: var(--border-radius-xl);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--spacing-lg);
}

.health-tip {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    color: var(--text-light);
    font-size: var(--font-size-lg);
    font-weight: 500;
    flex: 1;
    min-width: 300px;
}

.health-tip i {
    color: var(--warning-color);
    font-size: 1.5rem;
    animation: bounce 2s infinite;
}

.footer-links {
    display: flex;
    gap: var(--spacing-lg);
    flex-wrap: wrap;
}

.footer-link {
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    font-size: var(--font-size-base);
    font-weight: 500;
    transition: var(--transition-fast);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--border-radius-md);
}

.footer-link:hover {
    color: var(--text-light);
    background: rgba(255, 255, 255, 0.1);
    transform: translateY(-2px);
}

/* ============================================
   MODALES
   ============================================ */

.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(5px);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
    padding: var(--spacing-lg);
}

.modal-content {
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.95), rgba(255, 255, 255, 0.85));
    backdrop-filter: blur(20px);
    border-radius: var(--border-radius-xl);
    box-shadow: var(--shadow-xl);
    border: 1px solid rgba(255, 255, 255, 0.2);
    max-width: 500px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
    animation: modalSlideIn 0.3s ease-out;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-xl);
    border-bottom: 1px solid rgba(0, 0, 0, 0.1);
}

.modal-header h3 {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.modal-header h3 i {
    color: var(--primary-color);
}

.close-modal {
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--text-secondary);
    cursor: pointer;
    transition: var(--transition-fast);
    padding: var(--spacing-sm);
    border-radius: var(--border-radius-md);
}

.close-modal:hover {
    color: var(--danger-color);
    background: rgba(0, 0, 0, 0.05);
    transform: scale(1.1);
}

.modal-body {
    padding: var(--spacing-xl);
}

/* ============================================
   FORMULARIOS
   ============================================ */

.auth-form {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.form-group label {
    font-weight: 600;
    color: var(--text-primary);
    font-size: var(--font-size-base);
}

.form-group input,
.form-group select {
    padding: var(--spacing-md);
    border: 2px solid rgba(0, 0, 0, 0.1);
    border-radius: var(--border-radius-md);
    font-size: var(--font-size-base);
    font-family: var(--font-family);
    background: rgba(255, 255, 255, 0.9);
    transition: var(--transition-fast);
}

.form-group input:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(44, 90, 160, 0.1);
    background: rgba(255, 255, 255, 1);
}

.btn-submit {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-lg);
    background: linear-gradient(45deg, var(--primary-color), var(--secondary-color));
    color: var(--text-light);
    border: none;
    border-radius: var(--border-radius-md);
    font-size: var(--font-size-lg);
    font-weight: 600;
    font-family: var(--font-family);
    cursor: pointer;
    transition: var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.btn-submit::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
    transition: var(--transition-slow);
}

.btn-submit:hover::before {
    left: 100%;
}

.btn-submit:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-submit:active {
    transform: translateY(0);
}

/* ============================================
   RESPONSIVE DESIGN PARA NAVEGACIÓN
   ============================================ */

@media (max-width: 1024px) {
    .nav-container {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .nav-btn.primary {
        grid-column: 1 / -1;
    }
}

@media (max-width: 768px) {
    .nav-container {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }
    
    .nav-btn {
        font-size: var(--font-size-base);
        padding: var(--spacing-md) var(--spacing-lg);
        min-height: 60px;
    }
    
    .nav-btn.primary {
        font-size: var(--font-size-lg);
        padding: var(--spacing-lg) var(--spacing-xl);
        min-height: 70px;
    }
    
    .footer-content {
        flex-direction: column;
        text-align: center;
    }
    
    .health-tip {
        min-width: auto;
        justify-content: center;
        text-align: center;
    }
    
    .modal-content {
        margin: var(--spacing-lg);
    }
}

@media (max-width: 480px) {
    .nav-btn {
        font-size: var(--font-size-sm);
        padding: var(--spacing-sm) var(--spacing-md);
        min-height: 50px;
    }
    
    .nav-btn.primary {
        font-size: var(--font-size-base);
        padding: var(--spacing-md) var(--spacing-lg);
        min-height: 60px;
    }
    
    .nav-btn i {
        font-size: 1.2rem;
    }
    
    .modal {
        padding: var(--spacing-sm);
    }
    
    .modal-header,
    .modal-body {
        padding: var(--spacing-lg);
    }
}

/* ============================================
   ESTILOS PARA LEADERBOARD SCREEN
   ============================================ */

.leaderboard-screen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: #ffffff;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 100;
    opacity: 1;
    transition: opacity 0.3s ease;
}

.leaderboard-screen.hidden {
    opacity: 0;
    pointer-events: none;
}

.leaderboard-container {
    background: white;
    border-radius: 20px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
    width: 90%;
    max-width: 900px;
    max-height: 90vh;
    overflow-y: auto;
    padding: 30px;
    position: relative;
}

.leaderboard-header {
    text-align: center;
    margin-bottom: 30px;
    position: relative;
}

.leaderboard-header .back-btn {
    position: absolute;
    left: 0;
    top: 0;
    background: #f8f9fa;
    border: none;
    border-radius: 10px;
    padding: 10px 15px;
    color: #6c757d;
    font-size: 14px;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 8px;
}

.leaderboard-header .back-btn:hover {
    background: #e9ecef;
    color: var(--primary-color);
    transform: translateX(-3px);
}

.leaderboard-header h2 {
    margin: 0 0 10px 0;
    font-size: 2.5rem;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.leaderboard-header p {
    color: #666;
    margin: 0;
    font-style: italic;
}

.leaderboard-filters {
    display: flex;
    justify-content: center;
    gap: 15px;
    margin-bottom: 30px;
    flex-wrap: wrap;
}

.filter-btn {
    background: #f8f9fa;
    border: 2px solid #e9ecef;
    border-radius: 25px;
    padding: 10px 20px;
    color: #6c757d;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 8px;
    text-decoration: none;
}

.filter-btn:hover {
    background: #e9ecef;
    border-color: #dee2e6;
    color: #495057;
    transform: translateY(-2px);
}

.filter-btn.active {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    border-color: var(--primary-color);
    color: white;
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.3);
}

.loading-heroes {
    text-align: center;
    padding: 60px 20px;
    color: #7f8c8d;
}

.loading-heroes i {
    font-size: 3rem;
    margin-bottom: 15px;
    display: block;
    color: var(--primary-color);
}

/* Responsivo para Leaderboard */
@media (max-width: 768px) {
    .leaderboard-container {
        width: 95%;
        padding: 20px;
        max-height: 95vh;
    }
    
    .leaderboard-header h2 {
        font-size: 2rem;
    }
    
    .leaderboard-header .back-btn {
        position: relative;
        margin-bottom: 20px;
        align-self: flex-start;
    }
    
    .leaderboard-filters {
        gap: 10px;
    }
    
    .filter-btn {
        padding: 8px 15px;
        font-size: 13px;
    }
}

/* ============================================
   CELEBRACIÓN DE FINALIZACIÓN DEL JUEGO
   ============================================ */

.celebration-modal {
    animation: celebrationSlideIn 0.6s ease-out;
}

@keyframes celebrationSlideIn {
    from {
        opacity: 0;
        transform: scale(0.8) translateY(-50px);
    }
    to {
        opacity: 1;
        transform: scale(1) translateY(0);
    }
}

.custom-modal.celebration {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 50%, #f093fb 100%);
    border: 3px solid #ffd700;
    box-shadow: 0 20px 60px rgba(0,0,0,0.4);
    max-width: 600px;
    padding: 2rem;
    animation: celebrationPulse 2s ease-in-out infinite alternate;
}

@keyframes celebrationPulse {
    from {
        box-shadow: 0 20px 60px rgba(255,215,0,0.3);
    }
    to {
        box-shadow: 0 25px 80px rgba(255,215,0,0.6);
    }
}

.celebration-header {
    text-align: center;
    margin-bottom: 2rem;
}

.celebration-icon {
    font-size: 4rem;
    margin-bottom: 1rem;
    animation: bounce 1s ease-in-out infinite;
}

@keyframes bounce {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-20px); }
}

.celebration-header h2 {
    color: #ffd700;
    font-size: 2.5rem;
    margin: 0.5rem 0;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.5);
    font-weight: 800;
}

.celebration-fireworks {
    font-size: 2rem;
    margin: 1rem 0;
    animation: sparkle 1.5s ease-in-out infinite;
}

@keyframes sparkle {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.7; transform: scale(1.1); }
}

.celebration-content h3 {
    color: #fff;
    text-align: center;
    font-size: 1.8rem;
    margin-bottom: 1rem;
    text-shadow: 1px 1px 3px rgba(0,0,0,0.5);
}

.celebration-content p {
    color: #f8f9fa;
    text-align: center;
    font-size: 1.1rem;
    margin-bottom: 1.5rem;
    text-shadow: 1px 1px 2px rgba(0,0,0,0.3);
}

.achievement-summary {
    background: rgba(255,255,255,0.1);
    border-radius: 15px;
    padding: 1.5rem;
    margin: 1.5rem 0;
    backdrop-filter: blur(10px);
}

.achievement-summary h4 {
    color: #ffd700;
    text-align: center;
    margin-bottom: 1rem;
    font-size: 1.3rem;
}

.achievement-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
}

.achievement-item {
    display: flex;
    align-items: center;
    gap: 0.8rem;
    background: rgba(255,255,255,0.1);
    padding: 0.8rem;
    border-radius: 10px;
    border-left: 4px solid #00d4aa;
}

.achievement-icon {
    font-size: 1.5rem;
    width: 40px;
    text-align: center;
}

.achievement-text strong {
    display: block;
    color: #fff;
    font-size: 0.9rem;
    margin-bottom: 0.2rem;
}

.achievement-text span {
    color: #00d4aa;
    font-size: 0.8rem;
    font-weight: 600;
}

.final-message {
    text-align: center;
    margin: 2rem 0;
    padding: 1rem;
    background: rgba(255,215,0,0.1);
    border-radius: 10px;
    border: 2px solid rgba(255,215,0,0.3);
}

.final-message p {
    margin: 0.5rem 0;
    font-weight: 600;
}

.final-message p:first-child {
    color: #ffd700;
    font-size: 1.2rem;
}

/* Estados de nivel */
.level-card.locked {
    opacity: 0.6;
    cursor: not-allowed;
    filter: grayscale(50%);
}

.level-card.unlocked {
    opacity: 1;
    cursor: pointer;
    filter: none;
    animation: unlockGlow 1s ease-out;
}

/* Títulos de tipo de cáncer en las tarjetas */
.cancer-card h4 {
     color: #078930 !important;
     font-weight: 700;
     text-shadow: none;
}

@keyframes unlockGlow {
    0% {
        box-shadow: 0 0 0 rgba(0,212,170,0.5);
    }
    50% {
        box-shadow: 0 0 30px rgba(0,212,170,0.8);
    }
    100% {
        box-shadow: 0 8px 25px rgba(0,0,0,0.2);
    }
}

.unlock-requirement {
    position: absolute;
    bottom: 10px;
    left: 10px;
    right: 10px;
    background: rgba(255,107,107,0.9);
    color: white;
    padding: 0.5rem;
    border-radius: 8px;
    font-size: 0.8rem;
    text-align: center;
}

.status.locked {
    background: #ff6b6b;
    color: white;
}

.status.available {
    background: #00d4aa;
    color: white;
}

/* Responsivo para celebración */
@media (max-width: 768px) {
    .custom-modal.celebration {
        max-width: 90%;
        padding: 1.5rem;
    }
    
    .celebration-header h2 {
        font-size: 2rem;
    }
    
    .achievement-grid {
        grid-template-columns: 1fr;
    }
    
    .celebration-content h3 {
        font-size: 1.5rem;
    }
}