/* ==========================================================================
   STYLES.CSS - Premium Design System for Raíz Rendimiento
   Tailored HSL Colors, Glassmorphism, Micro-animations & Mobile-First Layouts
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@300;400;500;600;700;800&display=swap');

:root {
    /* HSL Color System */
    --brand-hue: 215;
    --brand-primary: hsl(var(--brand-hue), 100%, 45%);       /* #0066cc - Azul Raíz */
    --brand-hover: hsl(var(--brand-hue), 100%, 35%);         /* #004a99 */
    --brand-light: hsl(var(--brand-hue), 100%, 95%);         /* Celeste suave */
    --brand-dark: hsl(var(--brand-hue), 80%, 15%);           /* Azul noche */
    
    --success: hsl(150, 80%, 40%);                           /* Verde adherencia */
    --success-light: hsl(150, 80%, 95%);
    --warning: hsl(35, 100%, 50%);                           /* Amarillo/Ámbar fatiga */
    --warning-light: hsl(35, 100%, 95%);
    --danger: hsl(350, 80%, 50%);                            /* Rojo molestia/alerta */
    --danger-light: hsl(350, 80%, 96%);
    
    --text-main: hsl(220, 20%, 15%);
    --text-muted: hsl(220, 10%, 45%);
    --text-light: hsl(220, 10%, 75%);
    
    --bg-main: hsl(220, 20%, 97%);                           /* Fondo de página */
    --bg-card: hsl(0, 0%, 100%);                             /* Fondo de tarjetas */
    --bg-input: hsl(220, 20%, 98%);
    
    --border-color: hsl(220, 15%, 90%);
    
    /* Design Tokens */
    --radius-sm: 8px;
    --radius-md: 14px;
    --radius-lg: 20px;
    
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.04);
    --shadow-md: 0 10px 30px rgba(0, 0, 0, 0.05);
    --shadow-lg: 0 20px 50px rgba(0, 0, 0, 0.08);
    
    --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    -webkit-tap-highlight-color: transparent;
}

body {
    font-family: 'Outfit', sans-serif;
    color: var(--text-main);
    background-color: var(--bg-main);
    line-height: 1.5;
    min-height: 100vh;
    padding: 0;
}

/* Contenedor Principal con efecto Glassmorphism suave */
#app-container {
    width: 100%;
    max-width: 1300px;
    margin: 0 auto;
    background-color: var(--bg-card);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    box-shadow: var(--shadow-lg);
}

@media (min-width: 1024px) {
    body {
        padding: 40px 20px;
    }
    #app-container {
        min-height: calc(100vh - 80px);
        border-radius: var(--radius-lg);
        overflow: hidden;
    }
}

/* --- Utilities --- */
.hidden { display: none !important; }
.active { display: block !important; }
.flex-center { display: flex; align-items: center; justify-content: center; }

/* Grid containers */
.grid-container {
    display: grid;
    gap: 1.5rem;
}

/* --- UI Elements --- */
.badge {
    display: inline-flex;
    align-items: center;
    padding: 0.25rem 0.75rem;
    border-radius: 50px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.badge-success { background-color: var(--success-light); color: var(--success); }
.badge-warning { background-color: var(--warning-light); color: var(--warning); }
.badge-danger { background-color: var(--danger-light); color: var(--danger); }
.badge-info { background-color: var(--brand-light); color: var(--brand-primary); }

/* --- Forms & Inputs --- */
.form-group {
    margin-bottom: 1.25rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--text-muted);
}

.form-group input, 
.form-group select, 
.form-group textarea {
    width: 100%;
    padding: 0.8rem 1rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    font-family: 'Outfit', sans-serif;
    font-size: 0.95rem;
    color: var(--text-main);
    background-color: var(--bg-input);
    transition: var(--transition);
}

.form-group input:focus, 
.form-group select:focus, 
.form-group textarea:focus {
    border-color: var(--brand-primary);
    outline: none;
    background-color: var(--bg-card);
    box-shadow: 0 0 0 4px hsla(var(--brand-hue), 100%, 45%, 0.12);
}

/* --- Buttons --- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.8rem 1.6rem;
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-size: 0.95rem;
    font-weight: 600;
    font-family: 'Outfit', sans-serif;
    transition: var(--transition);
}

.btn:active {
    transform: scale(0.97);
}

.btn-primary {
    background-color: var(--brand-primary);
    color: white;
}

.btn-primary:hover {
    background-color: var(--brand-hover);
    box-shadow: 0 4px 15px hsla(var(--brand-hue), 100%, 45%, 0.25);
}

.btn-secondary {
    background-color: var(--bg-main);
    color: var(--text-main);
    border: 1px solid var(--border-color);
}

.btn-secondary:hover {
    background-color: var(--border-color);
}

.btn-danger {
    background-color: var(--danger-light);
    color: var(--danger);
    border: 1px solid hsla(350, 80%, 50%, 0.1);
}

.btn-danger:hover {
    background-color: var(--danger);
    color: white;
}

.btn-sm {
    padding: 0.5rem 1rem;
    font-size: 0.8rem;
    border-radius: var(--radius-sm);
}

/* --- Login Screen --- */
#login-screen {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--bg-main);
    padding: 20px;
}

.login-box {
    background: var(--bg-card);
    padding: 3rem 2rem;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    width: 100%;
    max-width: 440px;
    border: 1px solid var(--border-color);
    animation: fadeIn 0.4s ease-out;
}

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

.login-box header h1 {
    font-size: 2.2rem;
    font-weight: 800;
    color: var(--brand-dark);
    letter-spacing: -1px;
    margin-bottom: 0.3rem;
}

.login-box header p {
    font-size: 0.95rem;
    color: var(--text-muted);
}

.login-demo-tabs {
    display: flex;
    background-color: var(--bg-main);
    padding: 0.3rem;
    border-radius: var(--radius-sm);
    gap: 0.25rem;
    margin-bottom: 1.5rem;
}

.login-demo-tabs .btn-tab {
    flex: 1;
    border: none;
    background: none;
    padding: 0.75rem;
    font-family: 'Outfit', sans-serif;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-muted);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: var(--transition);
}

.login-demo-tabs .btn-tab.active {
    background-color: var(--bg-card);
    color: var(--brand-primary);
    box-shadow: var(--shadow-sm);
}

.login-help {
    margin-top: 1.5rem;
    font-size: 0.8rem;
    color: var(--text-muted);
    line-height: 1.7;
    background-color: var(--brand-light);
    padding: 1rem;
    border-radius: var(--radius-sm);
    border: 1px dashed hsla(var(--brand-hue), 100%, 45%, 0.15);
}

/* --- Layout Principal --- */
.main-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem 2rem;
    border-bottom: 1px solid var(--border-color);
    background-color: var(--bg-card);
}

.main-header .logo {
    font-size: 1.6rem;
    font-weight: 800;
    color: var(--brand-primary);
    letter-spacing: -1px;
}

.user-info {
    display: flex;
    align-items: center;
    gap: 1.25rem;
}

.user-info span {
    font-weight: 600;
    font-size: 0.95rem;
}

/* Tab Navigation Premium */
.view-nav {
    display: flex;
    gap: 1.5rem;
    padding: 0 2rem;
    background-color: var(--bg-card);
    border-bottom: 1px solid var(--border-color);
}

.nav-tab {
    border: none;
    background: none;
    padding: 1.25rem 0.5rem;
    font-family: 'Outfit', sans-serif;
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-muted);
    cursor: pointer;
    position: relative;
    transition: var(--transition);
}

.nav-tab:hover {
    color: var(--brand-primary);
}

.nav-tab.active {
    color: var(--brand-primary);
}

.nav-tab.active::after {
    content: '';
    position: absolute;
    bottom: -1px;
    left: 0;
    right: 0;
    height: 3px;
    background-color: var(--brand-primary);
    border-radius: 10px;
}

.main-content {
    padding: 2.5rem 2rem;
    background-color: var(--bg-main);
    flex-grow: 1;
}

/* --- CARDS & PANELS --- */
.card {
    background: var(--bg-card);
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
    padding: 1.75rem;
    transition: var(--transition);
}

.card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.card h3 {
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--brand-dark);
    margin-bottom: 1.25rem;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 0.75rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

/* --- Trainer Dashboard Elements --- */
.trainer-stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.stat-card {
    background: var(--bg-card);
    border-radius: var(--radius-md);
    padding: 1.5rem;
    border: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    min-height: 120px;
}

.stat-card .stat-label {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.stat-card .stat-number {
    font-size: 2.2rem;
    font-weight: 800;
    color: var(--brand-primary);
    line-height: 1;
    margin: 0.5rem 0;
}

.alert-item {
    padding: 0.8rem 1rem;
    border-radius: var(--radius-sm);
    margin-bottom: 0.75rem;
    font-size: 0.9rem;
    font-weight: 500;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-left: 4px solid transparent;
}

.alert-item.danger {
    background-color: var(--danger-light);
    color: var(--danger);
    border-left-color: var(--danger);
}

.alert-item.warning {
    background-color: var(--warning-light);
    color: var(--warning);
    border-left-color: var(--warning);
}

.alert-item.info {
    background-color: var(--brand-light);
    color: var(--brand-primary);
    border-left-color: var(--brand-primary);
}

.plan-table-wrapper {
    background: var(--bg-card);
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
    overflow-x: auto;
    margin-top: 1rem;
    -webkit-overflow-scrolling: touch;
}

.plan-table {
    width: 100%;
    border-collapse: collapse;
}

.plan-table th {
    background-color: var(--bg-input);
    padding: 1.2rem 1rem;
    font-size: 0.85rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--text-muted);
    border-bottom: 2px solid var(--border-color);
    text-align: left;
}

.plan-table td {
    padding: 1.2rem 1rem;
    border-bottom: 1px solid var(--border-color);
    font-size: 0.9rem;
    vertical-align: top;
    transition: var(--transition);
}

.plan-table tbody tr:hover td {
    background-color: var(--bg-input);
}

.plan-table td strong {
    color: var(--brand-dark);
}

.plan-table .cell-duration {
    font-weight: 600;
    color: var(--brand-primary);
    white-space: nowrap;
}

.plan-table .cell-rpe {
    display: inline-flex;
    align-items: center;
    font-weight: 700;
    padding: 0.2rem 0.5rem;
    border-radius: 4px;
    background-color: var(--bg-main);
}

.plan-table .rpe-high { background-color: var(--danger-light); color: var(--danger); }
.plan-table .rpe-medium { background-color: var(--warning-light); color: var(--warning); }
.plan-table .rpe-low { background-color: var(--success-light); color: var(--success); }

/* --- Athlete List View for Trainer --- */
.athlete-list-container {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1.5rem;
}

.athlete-card {
    background: var(--bg-card);
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
    padding: 1.5rem;
    cursor: pointer;
    transition: var(--transition);
}

.athlete-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
    border-color: var(--brand-primary);
}

.athlete-card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

.athlete-card-header h4 {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--brand-dark);
}

.athlete-card-metrics {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 0.5rem;
    background-color: var(--bg-main);
    padding: 0.75rem;
    border-radius: var(--radius-sm);
    margin-bottom: 1rem;
    text-align: center;
}

.athlete-card-metrics .metric {
    display: flex;
    flex-direction: column;
}

.athlete-card-metrics .metric .val {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--brand-primary);
}

.athlete-card-metrics .metric .lbl {
    font-size: 0.7rem;
    color: var(--text-muted);
    text-transform: uppercase;
}

/* --- Strategic Nutrition Module --- */
.nutricion-tab-container {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
}

.nutricion-tab-btn {
    padding: 0.6rem 1.2rem;
    border-radius: 50px;
    border: 1px solid var(--border-color);
    background-color: var(--bg-card);
    font-family: 'Outfit', sans-serif;
    font-weight: 600;
    font-size: 0.85rem;
    color: var(--text-muted);
    cursor: pointer;
    transition: var(--transition);
}

.nutricion-tab-btn:hover {
    border-color: var(--brand-primary);
    color: var(--brand-primary);
}

.nutricion-tab-btn.active {
    background-color: var(--brand-primary);
    color: white;
    border-color: var(--brand-primary);
}

.nutrition-strategy-box {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 1.5rem;
}

.nutrition-moment-card {
    background: var(--bg-card);
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
    overflow: hidden;
}

.nutrition-moment-card h4 {
    background-color: var(--brand-dark);
    color: white;
    padding: 1rem 1.5rem;
    font-size: 1rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.nutrition-moment-body {
    padding: 1.25rem 1.5rem;
}

.nutrition-item-row {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    padding: 0.75rem 0;
    border-bottom: 1px dashed var(--border-color);
}

.nutrition-item-row:last-child {
    border-bottom: none;
}

.nutrition-item-info {
    display: flex;
    flex-direction: column;
}

.nutrition-item-name {
    font-weight: 600;
    font-size: 0.95rem;
    color: var(--text-main);
}

.nutrition-item-notes {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-top: 0.2rem;
}

.nutrition-item-kcal {
    font-weight: 700;
    font-size: 0.85rem;
    color: var(--brand-primary);
    background-color: var(--brand-light);
    padding: 0.2rem 0.5rem;
    border-radius: 4px;
    white-space: nowrap;
}

/* --- Mobile Specific Card Layout for plans --- */
@media (max-width: 768px) {
    .plan-table-wrapper {
        border: none;
        background: transparent;
    }
    .plan-table thead {
        display: none; /* Ocultar cabeceras en móvil */
    }
    .plan-table tbody, .plan-table tr, .plan-table td {
        display: block;
        width: 100%;
    }
    .plan-table tr {
        background: var(--bg-card);
        border: 1px solid var(--border-color);
        border-radius: var(--radius-md);
        margin-bottom: 1rem;
        padding: 1rem;
        box-shadow: var(--shadow-sm);
    }
    .plan-table td {
        border: none;
        padding: 0.5rem 0;
        display: flex;
        justify-content: space-between;
        align-items: center;
        border-bottom: 1px solid var(--bg-main);
    }
    .plan-table td:last-child {
        border-bottom: none;
        justify-content: flex-end;
        padding-top: 1rem;
    }
    .plan-table td::before {
        content: attr(data-label);
        font-weight: 700;
        color: var(--text-muted);
        font-size: 0.75rem;
        text-transform: uppercase;
        letter-spacing: 0.5px;
    }
}

/* --- Modals Premium Style --- */
.modal-wrapper {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(17, 24, 39, 0.4);
    backdrop-filter: blur(8px);
    display: flex;
    justify-content: center;
    align-items: flex-start; /* Cambiado a flex-start para alinearse arriba si es muy alto */
    overflow-y: auto;        /* Habilitar scroll vertical en el contenedor del modal */
    padding: 3rem 1rem;      /* Margen de seguridad superior e inferior para el scroll */
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
}

.modal-wrapper.active {
    opacity: 1;
    visibility: visible;
}

.modal-content {
    background: var(--bg-card);
    padding: 2.5rem 2rem;
    border-radius: var(--radius-lg);
    width: 95%;
    max-width: 680px;
    box-shadow: var(--shadow-lg);
    transform: translateY(-20px);
    transition: var(--transition);
    border: 1px solid var(--border-color);
}

.modal-wrapper.active .modal-content {
    transform: translateY(0);
}

.modal-header h3 {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--brand-dark);
    letter-spacing: -0.5px;
}

.close-modal-btn {
    font-size: 1.8rem;
    cursor: pointer;
    color: var(--text-muted);
    transition: var(--transition);
}

.close-modal-btn:hover {
    color: var(--danger);
    transform: rotate(90deg);
}

/* Sub-navegación Premium (para Dashboard de Entrenador) */
.header-with-tabs {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 1rem;
    flex-wrap: wrap;
    gap: 1rem;
}

.sub-nav-tabs {
    display: flex;
    background-color: var(--border-color);
    padding: 0.25rem;
    border-radius: var(--radius-sm);
    gap: 0.25rem;
}

.sub-nav-tab {
    border: none;
    background: none;
    padding: 0.5rem 1rem;
    font-family: 'Outfit', sans-serif;
    font-weight: 600;
    font-size: 0.85rem;
    color: var(--text-muted);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: var(--transition);
}

.sub-nav-tab.active {
    background-color: var(--bg-card);
    color: var(--brand-primary);
    box-shadow: var(--shadow-sm);
}

/* Animations */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

/* --- Premium Mobile and Tablet Responsive Tweaks --- */
@media (max-width: 768px) {
    body {
        padding: 0;
        background-color: var(--bg-card); /* Integración fluida en móvil */
    }

    #app-container {
        border-radius: 0;
        box-shadow: none;
        min-height: 100vh;
    }

    .main-header {
        padding: 1rem;
        flex-direction: column;
        gap: 0.8rem;
        text-align: center;
        border-bottom: 2px solid var(--border-color);
    }

    .main-header .logo {
        font-size: 1.4rem;
    }

    .user-info {
        width: 100%;
        justify-content: space-between;
        gap: 0.5rem;
    }

    .user-info span {
        font-size: 0.85rem;
    }

    /* Navegación por pestañas deslizable tácticamente en móvil */
    .view-nav {
        padding: 0 1rem;
        gap: 1.25rem;
        overflow-x: auto;
        white-space: nowrap;
        -webkit-overflow-scrolling: touch;
        scrollbar-width: none; /* Ocular barra en Firefox */
    }
    
    .view-nav::-webkit-scrollbar {
        display: none; /* Ocultar barra en Chrome/Safari */
    }

    .nav-tab {
        padding: 1rem 0.2rem;
        font-size: 0.85rem;
        flex-shrink: 0;
    }

    .main-content {
        padding: 1.5rem 1rem;
    }

    /* Colapsar grids de múltiples columnas a 1 sola en móvil */
    .grid-container,
    .modal-form-grid,
    .feedback-form-grid {
        grid-template-columns: 1fr !important;
        gap: 1.25rem;
    }

    .trainer-stats-grid {
        grid-template-columns: repeat(2, 1fr) !important;
        gap: 1rem;
    }

    .stat-card .stat-number {
        font-size: 1.8rem;
    }

    .header-with-tabs {
        flex-direction: column;
        align-items: flex-start;
        gap: 1rem;
        margin-bottom: 1.5rem;
    }

    .header-with-tabs .badge {
        align-self: flex-start;
    }

    .plan-semanal-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 1rem;
        margin-bottom: 1.5rem;
    }

    .week-navigation {
        width: 100%;
        display: flex;
        justify-content: space-between;
        align-items: center;
        flex-wrap: wrap;
        gap: 0.75rem;
        font-size: 0.85rem;
    }

    .week-navigation button {
        padding: 0.4rem 0.8rem;
        font-size: 0.75rem;
    }

    /* Modales responsivos */
    .modal-content {
        padding: 1.5rem 1rem;
        width: 95%;
        border-radius: var(--radius-md);
    }

    .modal-header h3 {
        font-size: 1.2rem;
    }

    /* Fichas de nutrición móvil */
    .nutrition-day-card {
        padding: 0.75rem;
    }

    .nutrition-day-card span {
        font-size: 0.85rem !important;
    }
}