/* =========================================
   1. IMPORTAR FUENTES
   ========================================= */
@import url('https://fonts.googleapis.com/css2?family=Montserrat:wght@300;400;500;600;700&family=Playfair+Display:ital,wght@0,400;0,600;0,700;1,400&display=swap');

:root {
    --color-charleston: #1E3309;
    --color-citron: #849A28;
    --color-cerise: #E23260;
    --color-deep-blush: #F2678E;
    --color-light-pink: #FCA9AA;
    --color-blanco: #FFFFFF;
    --color-fondo: #FDFBF7;
    --color-gris-claro: #F4F4F4;
    --color-texto-oscuro: #1E3309;
    --color-texto-gris: #5A6B5A;
    --fuente-titulos: 'Playfair Display', serif;
    --fuente-texto: 'Montserrat', sans-serif;
    --sombra-suave: 0 4px 15px rgba(30, 51, 9, 0.08);
    --sombra-fuerte: 0 8px 25px rgba(226, 50, 96, 0.15);
    --borde-redondeado: 12px;
}

/* =========================================
   2. RESET
   ========================================= */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--fuente-texto);
    background-color: var(--color-fondo);
    color: var(--color-texto-oscuro);
    line-height: 1.6;
    font-size: 16px;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

main {
    flex: 1;
}

/* =========================================
   3. TIPOGRAFÍA
   ========================================= */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--fuente-titulos);
    font-weight: 700;
    color: var(--color-charleston);
    line-height: 1.2;
    margin-bottom: 1rem;
}

h1 { font-size: 3rem; }
h2 { font-size: 2.2rem; }
h3 { font-size: 1.8rem; }

p {
    margin-bottom: 1rem;
    color: var(--color-texto-gris);
}

a {
    text-decoration: none;
    color: var(--color-cerise);
    transition: color 0.3s ease;
}

a:hover {
    color: var(--color-deep-blush);
}

/* =========================================
   4. ESTRUCTURA
   ========================================= */
.contenedor {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.seccion {
    padding: 80px 0;
}

/* =========================================
   5. BOTONES
   ========================================= */
.boton {
    display: inline-block;
    padding: 12px 28px;
    font-family: var(--fuente-texto);
    font-weight: 600;
    font-size: 1rem;
    text-align: center;
    border: none;
    border-radius: 50px;
    cursor: pointer;
    transition: all 0.3s ease;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.boton-primario {
    background-color: var(--color-cerise);
    color: var(--color-blanco);
    box-shadow: var(--sombra-fuerte);
}

.boton-primario:hover {
    background-color: var(--color-deep-blush);
    transform: translateY(-2px);
    color: var(--color-blanco);
}

.boton-secundario {
    background-color: var(--color-citron);
    color: var(--color-blanco);
}

.boton-secundario:hover {
    background-color: var(--color-charleston);
    transform: translateY(-2px);
    color: var(--color-blanco);
}

.boton-outline {
    background-color: transparent;
    border: 2px solid var(--color-charleston);
    color: var(--color-charleston);
}

.boton-outline:hover {
    background-color: var(--color-charleston);
    color: var(--color-blanco);
}

/* =========================================
   6. FORMULARIOS
   ========================================= */
.grupo-formulario {
    margin-bottom: 20px;
}

.formulario-etiqueta {
    display: block;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--color-charleston);
}

.formulario-input, 
.formulario-select {
    width: 100%;
    padding: 12px 16px;
    font-family: var(--fuente-texto);
    font-size: 1rem;
    border: 2px solid var(--color-gris-claro);
    border-radius: 8px;
    background-color: var(--color-blanco);
    color: var(--color-texto-oscuro);
    transition: border-color 0.3s ease;
}

.formulario-input:focus, 
.formulario-select:focus {
    outline: none;
    border-color: var(--color-citron);
    box-shadow: 0 0 0 3px rgba(132, 154, 40, 0.2);
}

/* =========================================
   7. TARJETAS
   ========================================= */
.tarjeta {
    background-color: var(--color-blanco);
    border-radius: var(--borde-redondeado);
    padding: 30px;
    box-shadow: var(--sombra-suave);
    border: 1px solid rgba(30, 51, 9, 0.05);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.tarjeta:hover {
    transform: translateY(-5px);
    box-shadow: var(--sombra-fuerte);
}

/* =========================================
   8. UTILIDADES
   ========================================= */
.texto-centrado { text-align: center; }
.texto-rosa { color: var(--color-cerise); }
.texto-verde { color: var(--color-citron); }
.fondo-rosa { background-color: var(--color-light-pink); }
.mt-1 { margin-top: 10px; }
.mt-2 { margin-top: 20px; }
.mb-1 { margin-bottom: 10px; }
.mb-2 { margin-bottom: 20px; }

/* =========================================
   9. ENCABEZADO Y NAVEGACIÓN
   ========================================= */
.encabezado {
    background-color: var(--color-blanco);
    padding: 15px 0;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.encabezado-contenedor {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 20px;
}

.logo {
    font-family: var(--fuente-titulos);
    font-size: 2rem;
    font-weight: 700;
    color: var(--color-charleston);
    letter-spacing: 2px;
}

.logo span {
    color: var(--color-cerise);
}

.navegacion {
    display: flex;
    gap: 25px;
    align-items: center;
}

.navegacion a:not(.boton) {
    color: var(--color-texto-oscuro);
    font-weight: 500;
    font-size: 0.95rem;
    position: relative;
}

.navegacion a:not(.boton)::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--color-cerise);
    transition: width 0.3s ease;
}

.navegacion a:not(.boton):hover::after {
    width: 100%;
}

.navegacion a:not(.boton):hover {
    color: var(--color-cerise);
}

/* =========================================
   10. MENÚ HAMBURGUESA (NUEVO)
   ========================================= */
.menu-hamburguesa {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    padding: 10px;
    background: none;
    border: none;
    z-index: 1001;
}

.menu-hamburguesa span {
    width: 28px;
    height: 3px;
    background-color: var(--color-charleston);
    border-radius: 3px;
    transition: all 0.3s ease;
}

.menu-hamburguesa.activo span:nth-child(1) {
    transform: rotate(45deg) translate(6px, 6px);
}

.menu-hamburguesa.activo span:nth-child(2) {
    opacity: 0;
}

.menu-hamburguesa.activo span:nth-child(3) {
    transform: rotate(-45deg) translate(6px, -6px);
}

/* =========================================
   11. SISTEMA DE NOTIFICACIONES TOAST (NUEVO)
   ========================================= */
.toast-contenedor {
    position: fixed;
    top: 90px;
    right: 20px;
    z-index: 9999;
    display: flex;
    flex-direction: column;
    gap: 10px;
    max-width: 350px;
}

.toast {
    background-color: var(--color-blanco);
    padding: 16px 20px;
    border-radius: 12px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.15);
    display: flex;
    align-items: center;
    gap: 12px;
    animation: toastEntrada 0.4s ease-out;
    border-left: 4px solid var(--color-citron);
    min-width: 280px;
}

.toast.toast-exito {
    border-left-color: var(--color-citron);
}

.toast.toast-error {
    border-left-color: var(--color-cerise);
}

.toast.toast-info {
    border-left-color: var(--color-deep-blush);
}

.toast.toast-logro {
    border-left-color: #FFD700;
    background: linear-gradient(135deg, #FFF9E6 0%, var(--color-blanco) 100%);
}

.toast-icono {
    font-size: 1.5rem;
    flex-shrink: 0;
}

.toast-mensaje {
    flex: 1;
    color: var(--color-charleston);
    font-size: 0.95rem;
    font-weight: 500;
}

.toast.cerrando {
    animation: toastSalida 0.3s ease-in forwards;
}

@keyframes toastEntrada {
    from {
        opacity: 0;
        transform: translateX(100%);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes toastSalida {
    to {
        opacity: 0;
        transform: translateX(100%);
    }
}

/* =========================================
   12. CALCULADORA
   ========================================= */
.calculadora-hero {
    background-color: var(--color-fondo);
    padding: 60px 0 40px 0;
    text-align: center;
}

.calculadora-contenedor {
    max-width: 600px;
    margin: 0 auto;
    background-color: var(--color-blanco);
    padding: 40px;
    border-radius: var(--borde-redondeado);
    box-shadow: var(--sombra-suave);
    margin-bottom: 60px;
}

.grupo-opciones {
    display: flex;
    gap: 10px;
    margin-top: 10px;
}

.opcion-radio {
    display: none;
}

.opcion-etiqueta {
    flex: 1;
    padding: 15px;
    text-align: center;
    border: 2px solid var(--color-gris-claro);
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s ease;
    font-weight: 500;
    color: var(--color-texto-gris);
}

.opcion-radio:checked + .opcion-etiqueta {
    border-color: var(--color-citron);
    background-color: rgba(132, 154, 40, 0.1);
    color: var(--color-charleston);
    font-weight: 700;
}

.resultados-caja {
    display: none;
    margin-top: 30px;
    padding: 30px;
    background: linear-gradient(135deg, var(--color-light-pink) 0%, var(--color-blanco) 100%);
    border-radius: var(--borde-redondeado);
    border-left: 5px solid var(--color-cerise);
    animation: aparecer 0.5s ease-out;
}

@keyframes aparecer {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

.resultado-principal {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--color-cerise);
    margin: 10px 0;
    font-family: var(--fuente-titulos);
}

.resultado-detalle {
    display: flex;
    justify-content: space-between;
    margin-top: 20px;
    padding-top: 20px;
    border-top: 1px solid rgba(0,0,0,0.1);
    flex-wrap: wrap;
    gap: 15px;
}

.detalle-item {
    text-align: center;
    flex: 1;
    min-width: 100px;
}

.detalle-valor {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--color-charleston);
}

.detalle-texto {
    font-size: 0.85rem;
    color: var(--color-texto-gris);
    margin-top: 5px;
}

.peso-ideal-seccion {
    margin-top: 25px;
    padding: 20px;
    border-top: 1px dashed var(--color-citron);
    text-align: center;
    background-color: rgba(132, 154, 40, 0.05);
    border-radius: 8px;
}

.peso-ideal-seccion h4 {
    color: var(--color-charleston);
    font-size: 1rem;
    margin-bottom: 10px;
    font-family: var(--fuente-texto);
    font-weight: 600;
}

.peso-ideal-valor {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-citron);
    font-family: var(--fuente-titulos);
    line-height: 1.2;
}

.peso-ideal-texto {
    font-size: 0.85rem;
    color: var(--color-texto-gris);
    margin-top: 5px;
    margin-bottom: 0;
}

/* =========================================
   13. TRACKER
   ========================================= */
.tracker-hero {
    background-color: var(--color-fondo);
    padding: 60px 0 40px 0;
    text-align: center;
}

.tracker-resumen {
    text-align: center;
}

.barra-progreso-contenedor {
    width: 100%;
    height: 20px;
    background-color: var(--color-gris-claro);
    border-radius: 10px;
    margin: 20px 0;
    overflow: hidden;
}

.barra-progreso {
    height: 100%;
    width: 0%;
    background: linear-gradient(90deg, var(--color-citron), var(--color-charleston));
    border-radius: 10px;
    transition: width 0.5s ease, background 0.3s ease;
}

.resumen-textos {
    display: flex;
    justify-content: space-between;
    font-size: 1.1rem;
    color: var(--color-texto-oscuro);
    flex-wrap: wrap;
    gap: 10px;
}

.lista-limpia {
    list-style: none;
    padding: 0;
}

.item-alimento {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background-color: var(--color-blanco);
    padding: 15px 20px;
    border-radius: 8px;
    margin-bottom: 10px;
    box-shadow: var(--sombra-suave);
    border-left: 4px solid var(--color-citron);
    transition: transform 0.2s ease;
    gap: 10px;
}

.item-alimento:hover {
    transform: translateX(5px);
}

.item-alimento-info {
    display: flex;
    flex-direction: column;
    flex: 1;
    min-width: 0;
}

.item-alimento-nombre {
    font-weight: 600;
    color: var(--color-charleston);
    word-wrap: break-word;
}

.item-alimento-comida {
    font-size: 0.8rem;
    color: var(--color-texto-gris);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.item-alimento-acciones {
    display: flex;
    align-items: center;
    gap: 15px;
    flex-shrink: 0;
}

.item-alimento-calorias {
    font-weight: 700;
    color: var(--color-cerise);
    font-size: 1.1rem;
}

.btn-borrar-item {
    background: none;
    border: none;
    color: var(--color-cerise);
    cursor: pointer;
    font-size: 1.5rem;
    padding: 5px;
    line-height: 1;
    transition: transform 0.2s ease;
}

.btn-borrar-item:hover {
    transform: scale(1.2);
}

.mensaje-vacio {
    text-align: center;
    color: var(--color-texto-gris);
    padding: 40px 20px;
    font-style: italic;
}

/* =========================================
   14. DESAFÍO
   ========================================= */
.desafio-hero {
    background: linear-gradient(135deg, var(--color-light-pink) 0%, var(--color-blanco) 100%);
    padding: 60px 0 40px 0;
    text-align: center;
}

.desafio-racha {
    padding: 40px 20px;
}

.racha-numero {
    font-size: 5rem;
    font-weight: 700;
    color: var(--color-cerise);
    font-family: var(--fuente-titulos);
    line-height: 1;
    margin: 20px 0 10px 0;
}

.racha-texto {
    font-size: 1.2rem;
    color: var(--color-texto-gris);
    margin-bottom: 30px;
}

.desafio-tip {
    background: linear-gradient(135deg, var(--color-citron) 0%, var(--color-charleston) 100%);
    color: var(--color-blanco);
}

.desafio-tip h3 {
    color: var(--color-blanco);
}

.desafio-tip p {
    color: var(--color-blanco);
    font-size: 1.1rem;
    line-height: 1.6;
    margin-bottom: 0;
}

.logros-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 20px;
    margin-top: 30px;
}

.logro {
    opacity: 0.4;
    transition: all 0.3s ease;
}

.logro.desbloqueado {
    opacity: 1;
    border: 2px solid var(--color-citron);
    box-shadow: var(--sombra-fuerte);
}

.logro-icono {
    font-size: 3rem;
    margin-bottom: 10px;
}

.logro h4 {
    color: var(--color-charleston);
    margin-bottom: 5px;
}

.logro p {
    font-size: 0.9rem;
    color: var(--color-texto-gris);
}

.beneficios-lista {
    list-style: none;
    padding: 0;
}

.beneficios-lista li {
    padding: 15px 0;
    border-bottom: 1px solid var(--color-gris-claro);
    color: var(--color-texto-oscuro);
}

.beneficios-lista li:last-child {
    border-bottom: none;
}

/* =========================================
   15. DASHBOARD
   ========================================= */
.dashboard-hero {
    background: linear-gradient(135deg, var(--color-fondo) 0%, var(--color-light-pink) 100%);
    padding: 60px 0 40px 0;
    text-align: center;
}

.dashboard-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    margin-top: 20px;
}

.stat-card {
    padding: 30px 20px;
}

.stat-icono {
    font-size: 2.5rem;
    margin-bottom: 15px;
}

.stat-card h3 {
    font-size: 1rem;
    color: var(--color-texto-gris);
    margin-bottom: 10px;
    font-family: var(--fuente-texto);
    font-weight: 500;
}

.stat-valor {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--color-charleston);
    font-family: var(--fuente-titulos);
    line-height: 1;
}

.stat-positivo {
    color: var(--color-citron);
}

.stat-unidad {
    font-size: 0.9rem;
    color: var(--color-texto-gris);
    margin-top: 5px;
}

.dashboard-registro {
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.dashboard-grafico {
    padding: 40px 30px;
}

.grafico-contenedor {
    height: 300px;
    margin-top: 30px;
    position: relative;
}

.grafico-barras {
    display: flex;
    align-items: flex-end;
    justify-content: space-around;
    height: 100%;
    padding: 20px 0 40px 0;
    border-bottom: 2px solid var(--color-gris-claro);
    position: relative;
}

.barra-grafico {
    flex: 1;
    max-width: 60px;
    background: linear-gradient(to top, var(--color-citron), var(--color-charleston));
    border-radius: 8px 8px 0 0;
    position: relative;
    transition: all 0.3s ease;
    margin: 0 5px;
    min-height: 20px;
}

.barra-grafico:hover {
    opacity: 0.8;
    transform: scaleY(1.05);
}

.barra-valor {
    position: absolute;
    top: -25px;
    left: 50%;
    transform: translateX(-50%);
    font-size: 0.85rem;
    font-weight: 700;
    color: var(--color-charleston);
    white-space: nowrap;
}

.barra-fecha {
    position: absolute;
    bottom: -30px;
    left: 50%;
    transform: translateX(-50%);
    font-size: 0.75rem;
    color: var(--color-texto-gris);
    white-space: nowrap;
}

.item-historial {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background-color: var(--color-blanco);
    padding: 15px 20px;
    border-radius: 8px;
    margin-bottom: 10px;
    box-shadow: var(--sombra-suave);
    border-left: 4px solid var(--color-citron);
    flex-wrap: wrap;
    gap: 10px;
}

.item-historial-fecha {
    font-weight: 600;
    color: var(--color-charleston);
}

.item-historial-peso {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--color-cerise);
}

.item-historial-cambio {
    font-size: 0.9rem;
    color: var(--color-citron);
    font-weight: 600;
}

/* =========================================
   16. PÁGINA DE INICIO (HERO Y CARDS)
   ========================================= */
.hero {
    background: linear-gradient(135deg, var(--color-fondo) 0%, var(--color-light-pink) 100%);
    padding: 100px 0;
    text-align: center;
}

.hero h1 {
    font-size: 3.5rem;
    margin-bottom: 20px;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.hero p {
    font-size: 1.2rem;
    max-width: 600px;
    margin: 0 auto 40px auto;
}

.hero-botones {
    display: flex;
    gap: 20px;
    justify-content: center;
    flex-wrap: wrap;
}

.grid-tarjetas {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
    margin-top: 50px;
}

.tarjeta-icono {
    font-size: 3rem;
    margin-bottom: 20px;
}

.cta-final {
    background-color: var(--color-charleston);
    color: var(--color-blanco);
    text-align: center;
    padding: 80px 20px;
}

.cta-final h2 {
    color: var(--color-blanco);
}

.cta-final p {
    color: var(--color-light-pink);
    margin-bottom: 30px;
}

/* =========================================
   17. FOOTER
   ========================================= */
.pie-pagina {
    background-color: var(--color-charleston);
    color: var(--color-blanco);
    padding: 40px 0;
    text-align: center;
    margin-top: 60px;
}

.pie-pagina .logo {
    color: var(--color-blanco);
    margin-bottom: 20px;
}

.pie-pagina p {
    color: var(--color-light-pink);
    font-size: 0.9rem;
}

/* =========================================
   18. RESPONSIVE - TABLETS (hasta 992px)
   ========================================= */
@media (max-width: 992px) {
    h1 { font-size: 2.5rem; }
    h2 { font-size: 1.9rem; }
    
    .navegacion {
        gap: 15px;
    }
    
    .navegacion a:not(.boton) {
        font-size: 0.85rem;
    }
}

/* =========================================
   19. RESPONSIVE - MÓVILES (hasta 768px)
   ========================================= */
@media (max-width: 768px) {
    h1 { font-size: 2.2rem; }
    h2 { font-size: 1.7rem; }
    h3 { font-size: 1.4rem; }
    
    .seccion { padding: 50px 0; }
    
    /* Menú hamburguesa */
    .menu-hamburguesa {
        display: flex;
    }
    
    .encabezado-contenedor {
        position: relative;
    }
    
    .navegacion {
        position: fixed;
        top: 70px;
        right: -100%;
        width: 75%;
        max-width: 300px;
        height: calc(100vh - 70px);
        background-color: var(--color-blanco);
        flex-direction: column;
        padding: 30px 20px;
        gap: 15px;
        box-shadow: -5px 0 20px rgba(0,0,0,0.1);
        transition: right 0.3s ease;
        z-index: 999;
        align-items: flex-start;
    }
    
    .navegacion.activo {
        right: 0;
    }
    
    .navegacion a:not(.boton) {
        width: 100%;
        padding: 10px 0;
        border-bottom: 1px solid var(--color-gris-claro);
    }
    
    .navegacion a:not(.boton)::after {
        display: none;
    }
    
    .encabezado .boton {
        display: none;
    }
    
    /* Hero */
    .hero {
        padding: 60px 0;
    }
    
    .hero h1 {
        font-size: 2.2rem;
    }
    
    .hero p {
        font-size: 1rem;
    }
    
    .hero-botones {
        flex-direction: column;
        align-items: stretch;
    }
    
    .hero-botones .boton {
        width: 100%;
    }
    
    /* Botones */
    .boton {
        width: 100%;
        padding: 14px 20px;
    }
    
    /* Calculadora */
    .calculadora-contenedor {
        padding: 25px 20px;
    }
    
    .grupo-opciones {
        flex-direction: column;
    }
    
    .resultado-principal {
        font-size: 2rem;
    }
    
    .resultado-detalle {
        flex-direction: column;
        gap: 15px;
    }
    
    /* Dashboard */
    .dashboard-stats {
        grid-template-columns: 1fr;
    }
    
    .grafico-contenedor {
        height: 250px;
    }
    
    .barra-fecha {
        font-size: 0.65rem;
    }
    
    /* Desafío */
    .racha-numero {
        font-size: 4rem;
    }
    
    .logros-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    /* Tracker */
    .item-alimento {
        padding: 12px 15px;
    }
    
    /* Toast */
    .toast-contenedor {
        right: 10px;
        left: 10px;
        max-width: none;
    }
    
    .toast {
        min-width: auto;
    }
}

/* =========================================
   20. RESPONSIVE - MÓVILES PEQUEÑOS (hasta 480px)
   ========================================= */
@media (max-width: 480px) {
    h1 { font-size: 1.8rem; }
    h2 { font-size: 1.5rem; }
    
    .logo {
        font-size: 1.5rem;
    }
    
    .hero h1 {
        font-size: 1.8rem;
    }
    
    .tarjeta {
        padding: 20px;
    }
    
    .racha-numero {
        font-size: 3rem;
    }
    
    .stat-valor {
        font-size: 2rem;
    }
    
    .logros-grid {
        grid-template-columns: 1fr;
    }
}

/* =========================================
   21. RESPONSIVE - MÓVILES MUY PEQUEÑOS (hasta 360px)
   ========================================= */
@media (max-width: 360px) {
    h1 { font-size: 1.6rem; }
    
    .hero h1 {
        font-size: 1.6rem;
    }
    
    .contenedor {
        padding: 0 15px;
    }
    
    .tarjeta {
        padding: 15px;
    }
}

/* =========================================
   CALCULADORA INTELIGENTE (TRACKER)
   ========================================= */
.tarjeta-calculadora-smart {
    background: linear-gradient(135deg, rgba(226, 50, 96, 0.05), rgba(132, 154, 40, 0.05));
    border: 2px solid var(--color-citron);
}

.resultado-calorias-dinamico {
    margin-top: 15px;
    padding: 15px;
    background: linear-gradient(135deg, rgba(226, 50, 96, 0.1), rgba(132, 154, 40, 0.1));
    border-radius: 8px;
    border-left: 4px solid var(--color-cerise);
    display: none; /* Se muestra con JS */
}


/* =========================================
   CELEBRACIÓN DE LOGROS
   ========================================= */
.celebracion-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(30, 51, 9, 0.85);
    backdrop-filter: blur(5px);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 10000;
    opacity: 0;
    transition: opacity 0.3s ease;
    padding: 20px;
}

.celebracion-overlay.activo {
    opacity: 1;
}

.celebracion-modal {
    background: var(--color-blanco);
    border-radius: 20px;
    padding: 40px 30px;
    max-width: 450px;
    width: 100%;
    text-align: center;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    transform: scale(0.7) translateY(50px);
    transition: transform 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
    position: relative;
    overflow: hidden;
}

.celebracion-overlay.activo .celebracion-modal {
    transform: scale(1) translateY(0);
}

.celebracion-modal::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 6px;
    background: var(--fondo-hito);
}

.celebracion-emoji {
    font-size: 5rem;
    margin-bottom: 15px;
    animation: bounceEmoji 1s ease-in-out infinite;
    display: inline-block;
}

@keyframes bounceEmoji {
    0%, 100% { transform: translateY(0) rotate(0deg); }
    25% { transform: translateY(-15px) rotate(-5deg); }
    75% { transform: translateY(-15px) rotate(5deg); }
}

.celebracion-titulo {
    font-family: var(--fuente-titulos);
    font-size: 2rem;
    color: var(--color-hito);
    margin-bottom: 15px;
    line-height: 1.2;
}

.celebracion-mensaje {
    font-size: 1rem;
    color: var(--color-texto-gris);
    line-height: 1.6;
    margin-bottom: 25px;
}

.celebracion-dias {
    display: flex;
    flex-direction: column;
    align-items: center;
    margin: 25px 0;
    padding: 20px;
    background: linear-gradient(135deg, rgba(132, 154, 40, 0.1), rgba(226, 50, 96, 0.1));
    border-radius: 15px;
}

.celebracion-numero {
    font-size: 4rem;
    font-weight: 700;
    color: var(--color-hito);
    font-family: var(--fuente-titulos);
    line-height: 1;
}

.celebracion-texto {
    font-size: 1rem;
    color: var(--color-texto-gris);
    text-transform: uppercase;
    letter-spacing: 2px;
    margin-top: 5px;
}

.celebracion-boton {
    margin-top: 20px;
    padding: 14px 30px;
    font-size: 1rem;
    width: 100%;
}

/* Responsive */
@media (max-width: 480px) {
    .celebracion-modal {
        padding: 30px 20px;
    }
    
    .celebracion-emoji {
        font-size: 4rem;
    }
    
    .celebracion-titulo {
        font-size: 1.6rem;
    }
    
    .celebracion-numero {
        font-size: 3rem;
    }
}

/* =========================================
   MENÚ DE USUARIO (DROPDOWN)
   ========================================= */
.btn-usuario {
    position: relative;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 12px 20px;
    transition: all 0.3s ease;
}

.btn-usuario::after {
    content: '▼';
    font-size: 0.7rem;
    opacity: 0.7;
    transition: transform 0.3s ease;
}

.btn-usuario[aria-expanded="true"]::after {
    transform: rotate(180deg);
}

.menu-usuario {
    position: absolute;
    top: calc(100% + 10px);
    right: 0;
    background: var(--color-blanco);
    border-radius: 12px;
    box-shadow: 0 10px 40px rgba(30, 51, 9, 0.15);
    min-width: 220px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px) scale(0.95);
    transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    z-index: 1000;
    overflow: hidden;
}

.menu-usuario.activo {
    opacity: 1;
    visibility: visible;
    transform: translateY(0) scale(1);
}

.menu-usuario::before {
    content: '';
    position: absolute;
    top: -6px;
    right: 20px;
    width: 12px;
    height: 12px;
    background: var(--color-blanco);
    transform: rotate(45deg);
    box-shadow: -2px -2px 4px rgba(0, 0, 0, 0.05);
}

.menu-usuario-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 14px 20px;
    color: var(--color-texto-oscuro);
    text-decoration: none;
    font-weight: 500;
    transition: all 0.2s ease;
    border: none;
    background: none;
    width: 100%;
    cursor: pointer;
    font-size: 0.95rem;
    font-family: var(--fuente-texto);
}

.menu-usuario-item:hover {
    background: linear-gradient(135deg, rgba(132, 154, 40, 0.1), rgba(226, 50, 96, 0.05));
    color: var(--color-cerise);
}

.menu-icono {
    font-size: 1.2rem;
    width: 24px;
    text-align: center;
}

.menu-usuario-divider {
    height: 1px;
    background: var(--color-gris-claro);
    margin: 4px 0;
}

.menu-logout {
    color: var(--color-cerise);
}

.menu-logout:hover {
    background: rgba(226, 50, 96, 0.1);
}

/* =========================================
   RESPONSIVE - MÓVILES
   ========================================= */
@media (max-width: 768px) {
    .menu-usuario {
        right: -10px;
        min-width: 200px;
        box-shadow: 0 15px 50px rgba(30, 51, 9, 0.2);
    }
    
    .menu-usuario::before {
        right: 26px;
    }
    
    .menu-usuario-item {
        padding: 12px 16px;
        font-size: 0.9rem;
    }
    
    .btn-usuario {
        padding: 10px 16px;
        font-size: 0.9rem;
    }
}

@media (max-width: 480px) {
    .menu-usuario {
        right: -20px;
        min-width: calc(100vw - 40px);
        max-width: 280px;
    }
    
    .menu-usuario::before {
        right: 36px;
    }
    
    .menu-usuario-item {
        padding: 14px 18px;
    }
}


/* =========================================
   INTERCAMBIOS INTELIGENTES
   ========================================= */
.filtros-categoria {
    margin: 30px 0;
}

.boton-filtro {
    padding: 10px 20px;
    background-color: var(--color-blanco);
    border: 2px solid var(--color-gris-claro);
    border-radius: 50px;
    font-family: var(--fuente-texto);
    font-weight: 500;
    font-size: 0.9rem;
    color: var(--color-texto-gris);
    cursor: pointer;
    transition: all 0.3s ease;
}

.boton-filtro:hover {
    border-color: var(--color-citron);
    color: var(--color-charleston);
}

.boton-filtro.activo {
    background-color: var(--color-citron);
    border-color: var(--color-citron);
    color: var(--color-blanco);
    font-weight: 600;
}

.grid-intercambios {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 25px;
    margin: 30px 0;
}

.tarjeta-intercambio {
    background-color: var(--color-blanco);
    border-radius: var(--borde-redondeado);
    padding: 25px;
    box-shadow: var(--sombra-suave);
    border: 1px solid rgba(30, 51, 9, 0.05);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.tarjeta-intercambio:hover {
    transform: translateY(-5px);
    box-shadow: var(--sombra-fuerte);
}

.tarjeta-intercambio::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--color-cerise), var(--color-citron));
}

.intercambio-categoria {
    display: inline-block;
    padding: 4px 12px;
    background-color: rgba(132, 154, 40, 0.1);
    color: var(--color-citron);
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 15px;
}

.intercambio-titulo {
    font-family: var(--fuente-titulos);
    font-size: 1.3rem;
    color: var(--color-charleston);
    margin-bottom: 20px;
    text-align: center;
}

.intercambio-comparacion {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 15px;
    margin-bottom: 20px;
}

.intercambio-item {
    flex: 1;
    text-align: center;
    padding: 15px 10px;
    border-radius: 10px;
}

.intercambio-original {
    background-color: rgba(226, 50, 96, 0.05);
    border: 1px solid rgba(226, 50, 96, 0.2);
}

.intercambio-sustituto {
    background-color: rgba(132, 154, 40, 0.05);
    border: 1px solid rgba(132, 154, 40, 0.2);
}

.intercambio-emoji {
    font-size: 2.5rem;
    margin-bottom: 8px;
    display: block;
}

.intercambio-nombre {
    font-weight: 600;
    font-size: 0.9rem;
    color: var(--color-texto-oscuro);
    margin-bottom: 5px;
    min-height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.intercambio-calorias {
    font-size: 1.1rem;
    font-weight: 700;
    font-family: var(--fuente-titulos);
}

.intercambio-original .intercambio-calorias {
    color: var(--color-cerise);
}

.intercambio-sustituto .intercambio-calorias {
    color: var(--color-citron);
}

.intercambio-flecha {
    font-size: 1.5rem;
    color: var(--color-charleston);
    flex-shrink: 0;
}

.intercambio-ahorro {
    background: linear-gradient(135deg, var(--color-cerise), var(--color-deep-blush));
    color: var(--color-blanco);
    padding: 12px;
    border-radius: 10px;
    text-align: center;
    font-weight: 700;
    font-size: 1rem;
    box-shadow: 0 4px 15px rgba(226, 50, 96, 0.3);
}

.intercambio-ahorro span {
    font-size: 1.3rem;
    font-family: var(--fuente-titulos);
}

/* Responsive */
@media (max-width: 768px) {
    .grid-intercambios {
        grid-template-columns: 1fr;
    }
    
    .boton-filtro {
        padding: 8px 16px;
        font-size: 0.85rem;
    }
}

@media (max-width: 480px) {
    .intercambio-comparacion {
        flex-direction: column;
    }
    
    .intercambio-flecha {
        transform: rotate(90deg);
    }
    
    .intercambio-item {
        width: 100%;
    }
}

/* =========================================
   CHECKBOX RECORDARME (LOGIN)
   ========================================= */
.recordarme-container {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    margin-bottom: 20px;
    padding: 12px 16px;
    background-color: rgba(132, 154, 40, 0.05);
    border-radius: 8px;
    border: 1px solid rgba(132, 154, 40, 0.2);
    cursor: pointer;
    transition: all 0.3s ease;
}

.recordarme-container:hover {
    background-color: rgba(132, 154, 40, 0.1);
    border-color: var(--color-citron);
}

.recordarme-checkbox {
    width: 20px;
    height: 20px;
    margin-top: 2px;
    accent-color: var(--color-citron);
    cursor: pointer;
    flex-shrink: 0;
}

.recordarme-label {
    display: flex;
    flex-direction: column;
    gap: 2px;
    cursor: pointer;
    user-select: none;
}

.recordarme-texto {
    font-weight: 600;
    color: var(--color-charleston);
    font-size: 0.95rem;
}

.recordarme-info {
    font-size: 0.8rem;
    color: var(--color-texto-gris);
}

/* Responsive */
@media (max-width: 480px) {
    .recordarme-container {
        padding: 10px 12px;
    }
    
    .recordarme-checkbox {
        width: 18px;
        height: 18px;
    }
    
    .recordarme-texto {
        font-size: 0.9rem;
    }
    
    .recordarme-info {
        font-size: 0.75rem;
    }
}


/* =========================================
   NOTIFICACIONES TOAST
   ========================================= */
.toast-contenedor {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 10000;
    display: flex;
    flex-direction: column;
    gap: 10px;
    max-width: 400px;
}

.toast {
    background-color: var(--color-blanco);
    padding: 16px 20px;
    border-radius: 10px;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
    font-weight: 500;
    font-size: 0.95rem;
    transform: translateX(400px);
    opacity: 0;
    transition: all 0.3s cubic-bezier(0.68, -0.55, 0.265, 1.55);
    border-left: 4px solid var(--color-citron);
}

.toast-visible {
    transform: translateX(0);
    opacity: 1;
}

.toast-exito {
    border-left-color: #48BB78;
    background: linear-gradient(135deg, rgba(72, 187, 120, 0.05), var(--color-blanco));
}

.toast-error {
    border-left-color: var(--color-cerise);
    background: linear-gradient(135deg, rgba(226, 50, 96, 0.05), var(--color-blanco));
}

.toast-info {
    border-left-color: #4299E1;
    background: linear-gradient(135deg, rgba(66, 153, 225, 0.05), var(--color-blanco));
}

.toast-logro {
    border-left-color: #FFD700;
    background: linear-gradient(135deg, rgba(255, 215, 0, 0.1), var(--color-blanco));
    font-weight: 600;
}

/* Responsive */
@media (max-width: 480px) {
    .toast-contenedor {
        top: 10px;
        right: 10px;
        left: 10px;
        max-width: none;
    }
    
    .toast {
        font-size: 0.9rem;
        padding: 14px 16px;
    }
}