/* ==========================================================================
   AURA FITNESS DESIGN SYSTEM - INDEX.CSS
   ========================================================================== */

:root {
    /* Color Palette */
    --bg-black: #000000;
    --bg-obsidian: #08080a;
    --bg-card: #121216;
    --bg-card-hover: #191922;
    --border-color: rgba(255, 255, 255, 0.08);
    --border-color-glow: rgba(0, 245, 212, 0.3);
    
    --text-primary: #ffffff;
    --text-secondary: #90909c;
    --text-muted: #52525e;
    
    --color-neon-purple: #7b2cbf;
    --color-neon-teal: #00f5d4;
    --color-neon-pink: #ff007f;
    --color-cyan: #00b4d8;
    
    /* Gradients */
    --gradient-primary: linear-gradient(135deg, #7b2cbf 0%, #00f5d4 100%);
    --gradient-purple: linear-gradient(135deg, #9d4edd 0%, #5a189a 100%);
    --gradient-teal: linear-gradient(135deg, #00f5d4 0%, #00b4d8 100%);
    --gradient-dark: linear-gradient(180deg, rgba(18, 18, 22, 0.8) 0%, rgba(8, 8, 10, 0.95) 100%);
    
    /* Feedback States */
    --color-danger: #ff4757;
    --color-success: #2ed573;
    
    /* Typography */
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    --font-display: 'Space Grotesk', sans-serif;
}

/* ==========================================================================
   Base & Layout Reset
   ========================================================================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    -webkit-tap-highlight-color: transparent;
}

body {
    background-color: var(--bg-black);
    color: var(--text-primary);
    font-family: var(--font-sans);
    overflow: hidden;
    height: 100vh;
    width: 100vw;
    display: flex;
    justify-content: center;
    align-items: center;
}

/* Contenedor tipo Aplicación Móvil (Centrado en Pantallas Grandes) */
#app-container {
    width: 100%;
    height: 100%;
    max-width: 480px;
    background-color: var(--bg-obsidian);
    position: relative;
    box-shadow: 0 0 40px rgba(0, 0, 0, 0.8);
    overflow: hidden;
    border-left: 1px solid var(--border-color);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
}

@media (max-width: 480px) {
    #app-container {
        border-left: none;
        border-right: none;
        box-shadow: none;
    }
}

/* ==========================================================================
   Navegación entre Pantallas (SPA)
   ========================================================================== */
.screen {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: opacity 0.35s cubic-bezier(0.4, 0, 0.2, 1), 
                transform 0.35s cubic-bezier(0.4, 0, 0.2, 1),
                visibility 0.35s;
    background-color: var(--bg-obsidian);
    z-index: 10;
}

.screen.active {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    transform: scale(1);
}

/* Main Layout con Bottom Navigation */
#main-layout {
    display: flex;
    flex-direction: column;
    height: 100%;
}

#main-content {
    flex: 1;
    overflow-y: auto;
    padding: 24px 20px 100px 20px;
    scroll-behavior: smooth;
    -webkit-overflow-scrolling: touch;
}

.tab-pane {
    display: none;
}

.tab-pane.active {
    display: block;
}

/* ==========================================================================
   Componentes Comunes: Botones, Inputs e Información
   ========================================================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 14px 24px;
    font-size: 15px;
    font-weight: 600;
    font-family: var(--font-display);
    border-radius: 12px;
    border: none;
    cursor: pointer;
    transition: all 0.2s ease;
    gap: 8px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.btn:disabled {
    opacity: 0.4;
    cursor: not-allowed;
    pointer-events: none;
    box-shadow: none;
}

.btn-primary {
    background: var(--gradient-primary);
    color: var(--bg-black);
}

.btn-primary:active {
    transform: scale(0.98);
    opacity: 0.9;
}

.btn-primary:disabled {
    background: var(--text-muted);
    color: var(--text-secondary);
    cursor: not-allowed;
    box-shadow: none;
}

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

.btn-secondary:active {
    background-color: var(--bg-card-hover);
}

.btn-outline {
    background: transparent;
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.btn-danger {
    color: var(--color-danger);
    border-color: rgba(255, 71, 87, 0.3);
}

.btn-danger:active {
    background-color: rgba(255, 71, 87, 0.1);
}

.btn-sm {
    padding: 10px 16px;
    font-size: 13px;
}

.btn-block {
    display: flex;
    width: 100%;
}

.btn-half {
    width: 48%;
}

/* Efecto de Brillo (Glow) */
.btn-glow {
    box-shadow: 0 0 15px rgba(0, 245, 212, 0.25);
}

.btn-glow:hover {
    box-shadow: 0 0 25px rgba(0, 245, 212, 0.45);
}

/* Inputs de Formulario */
.form-group {
    margin-bottom: 20px;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.form-row {
    display: flex;
    gap: 16px;
    width: 100%;
}

.form-row .form-group {
    flex: 1;
}

label {
    font-size: 13px;
    font-weight: 500;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.8px;
    font-family: var(--font-display);
}

input[type="text"],
input[type="number"] {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 14px;
    border-radius: 12px;
    font-size: 15px;
    font-family: var(--font-sans);
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
    width: 100%;
}

input[type="text"]:focus,
input[type="number"]:focus {
    outline: none;
    border-color: var(--color-neon-teal);
    box-shadow: 0 0 8px rgba(0, 245, 212, 0.15);
}

/* Text Utility */
.text-center { text-align: center; }
.text-secondary { color: var(--text-secondary); }
.text-muted { color: var(--text-muted); }
.text-cyan { color: var(--color-neon-teal); }
.text-sm { font-size: 14px; }
.text-xs { font-size: 12px; }
.font-mono { font-family: monospace; }
.uppercase { text-transform: uppercase; }
.tracking-widest { letter-spacing: 1.5px; }
.hidden { display: none !important; }

/* Badges */
.badge {
    display: inline-block;
    padding: 5px 10px;
    font-size: 11px;
    font-weight: 600;
    border-radius: 30px;
    font-family: var(--font-display);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.badge-glow {
    background: rgba(0, 245, 212, 0.1);
    color: var(--color-neon-teal);
    border: 1px solid rgba(0, 245, 212, 0.25);
    box-shadow: 0 0 10px rgba(0, 245, 212, 0.1);
}

/* ==========================================================================
   Sección: Onboarding Flow
   ========================================================================== */
#screen-onboarding {
    z-index: 100;
    padding: 40px 24px;
    display: flex;
    flex-direction: column;
}

.onboarding-step {
    display: none;
    flex-direction: column;
    height: 100%;
    justify-content: space-between;
    animation: stepFadeIn 0.3s ease forwards;
}

.onboarding-step.active {
    display: flex;
}

@keyframes stepFadeIn {
    from { opacity: 0; transform: translateY(15px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Welcome Brand */
.brand-hero {
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    margin-top: 60px;
    margin-bottom: 40px;
}

.brand-glow {
    position: absolute;
    width: 140px;
    height: 140px;
    background: var(--gradient-primary);
    border-radius: 50%;
    filter: blur(40px);
    opacity: 0.3;
    z-index: 0;
    animation: pulse 4s infinite alternate;
}

@keyframes pulse {
    0% { transform: scale(0.9); opacity: 0.2; }
    100% { transform: scale(1.1); opacity: 0.4; }
}

.brand-logo {
    font-family: var(--font-display);
    font-size: 72px;
    font-weight: 700;
    letter-spacing: 6px;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    z-index: 1;
}

.brand-subtitle {
    font-family: var(--font-display);
    font-size: 13px;
    font-weight: 500;
    letter-spacing: 8px;
    color: var(--text-secondary);
    margin-top: -10px;
    z-index: 1;
}

.section-title {
    font-family: var(--font-display);
    font-size: 26px;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 12px;
}

/* Step Headers */
.step-header {
    margin-bottom: 24px;
}

.step-indicator {
    font-size: 12px;
    font-weight: 600;
    color: var(--color-neon-purple);
    text-transform: uppercase;
    letter-spacing: 1.5px;
    font-family: var(--font-display);
}

.onboarding-title {
    font-family: var(--font-display);
    font-size: 24px;
    font-weight: 700;
    margin-top: 4px;
}

.onboarding-content {
    flex: 1;
    overflow-y: auto;
    padding: 10px 0;
}

.onboarding-actions {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-top: 20px;
}

/* Goal Selector Cards */
.card-selector-grid {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.card-select-option {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 16px;
    cursor: pointer;
    transition: all 0.2s ease;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.card-select-option:hover {
    border-color: rgba(255, 255, 255, 0.15);
}

.card-select-option.active {
    border-color: var(--color-neon-teal);
    background: rgba(0, 245, 212, 0.03);
    box-shadow: 0 0 15px rgba(0, 245, 212, 0.08);
}

.card-select-option .option-title {
    font-family: var(--font-display);
    font-size: 16px;
    font-weight: 700;
    color: var(--text-primary);
}

.card-select-option .option-desc {
    font-size: 13px;
    color: var(--text-secondary);
}

/* Segment Controller */
.segment-control {
    display: flex;
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 4px;
    width: 100%;
}

.segment-btn {
    flex: 1;
    background: transparent;
    border: none;
    color: var(--text-secondary);
    padding: 10px;
    font-size: 13px;
    font-weight: 600;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.2s ease;
    font-family: var(--font-display);
}

.segment-btn.active {
    background-color: var(--bg-card-hover);
    color: var(--text-primary);
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.3);
}

/* Days Selector Grid */
.days-selector {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 12px;
    margin-bottom: 24px;
}

.day-btn {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 14px 8px;
    cursor: pointer;
    transition: all 0.2s ease;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
}

.day-btn span:first-child {
    font-family: var(--font-display);
    font-size: 18px;
    font-weight: 700;
    color: var(--text-secondary);
}

.day-btn .day-name {
    font-size: 11px;
    color: var(--text-muted);
    text-transform: uppercase;
}

.day-btn.active {
    background: var(--gradient-primary);
    border-color: var(--color-neon-teal);
    box-shadow: 0 0 15px rgba(0, 245, 212, 0.15);
}

.day-btn.active span:first-child,
.day-btn.active .day-name {
    color: var(--bg-black);
}

/* Preview Box */
.routine-preview-card {
    background: linear-gradient(135deg, rgba(123, 44, 191, 0.08) 0%, rgba(0, 245, 212, 0.08) 100%);
    border: 1px solid var(--border-color-glow);
    border-radius: 12px;
    padding: 16px;
    animation: fadeIn 0.3s ease;
}

.preview-title {
    font-family: var(--font-display);
    font-size: 13px;
    font-weight: 600;
    color: var(--text-primary);
    text-transform: uppercase;
    margin-bottom: 6px;
    letter-spacing: 0.5px;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

/* ==========================================================================
   Sección: Dashboard (Home)
   ========================================================================== */
.tab-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 24px;
}

.welcome-title {
    font-family: var(--font-display);
    font-size: 26px;
    font-weight: 700;
}

.header-avatar {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: var(--gradient-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    border: 2px solid var(--bg-black);
    box-shadow: 0 0 10px rgba(0, 245, 212, 0.3);
}

.header-avatar span {
    font-family: var(--font-display);
    color: var(--bg-black);
    font-weight: 700;
    font-size: 16px;
}

/* Stats Quick Grid */
.stats-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    margin-bottom: 20px;
}

.stat-card {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 16px;
    display: flex;
    align-items: center;
    gap: 12px;
}

.stat-icon {
    font-size: 24px;
}

.stat-info {
    display: flex;
    flex-direction: column;
}

.stat-val {
    font-family: var(--font-display);
    font-size: 22px;
    font-weight: 700;
}

.stat-lbl {
    font-size: 11px;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* Progress Ring Card */
.progress-ring-card {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    padding: 20px;
    margin-bottom: 24px;
}

.progress-ring-details h3 {
    font-family: var(--font-display);
    font-size: 16px;
    font-weight: 700;
    margin-bottom: 4px;
}

.weekly-dot-grid {
    display: flex;
    justify-content: space-between;
    margin-top: 16px;
    border-top: 1px solid var(--border-color);
    padding-top: 16px;
}

.weekly-day-dot {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
}

.weekly-day-lbl {
    font-size: 10px;
    color: var(--text-muted);
    font-weight: 600;
}

.weekly-dot-circle {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background-color: var(--bg-obsidian);
    border: 2px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 9px;
    font-weight: 700;
    color: var(--text-muted);
    transition: all 0.25s ease;
}

.weekly-day-dot.active .weekly-day-lbl {
    color: var(--text-primary);
}

.weekly-day-dot.completed .weekly-dot-circle {
    background: var(--gradient-primary);
    border-color: var(--color-neon-teal);
    color: var(--bg-black);
    box-shadow: 0 0 10px rgba(0, 245, 212, 0.2);
}

.weekly-day-dot.today .weekly-dot-circle {
    border-color: var(--color-neon-teal);
}

/* Today Workout Big Card */
.today-workout-card {
    position: relative;
    border-radius: 20px;
    overflow: hidden;
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    padding: 24px;
    z-index: 1;
}

.workout-card-glow {
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle at center, rgba(123, 44, 191, 0.12) 0%, transparent 60%);
    z-index: 0;
    pointer-events: none;
}

.workout-card-content {
    position: relative;
    z-index: 1;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.today-title {
    font-family: var(--font-display);
    font-size: 22px;
    font-weight: 700;
}

.card-footer-action {
    margin-top: 10px;
}

/* ==========================================================================
   Sección: Tab de Rutinas
   ========================================================================== */
.routines-list {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.routine-block-card {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 20px;
    cursor: pointer;
    transition: transform 0.2s ease, border-color 0.2s ease;
}

.routine-block-card:active {
    transform: scale(0.98);
}

.routine-block-card.active-border {
    border-color: var(--color-neon-purple);
}

.routine-block-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 12px;
}

.routine-block-title {
    font-family: var(--font-display);
    font-size: 18px;
    font-weight: 700;
}

.routine-block-exercises {
    display: flex;
    flex-direction: column;
    gap: 10px;
    border-top: 1px solid var(--border-color);
    padding-top: 12px;
    margin-top: 8px;
}

.routine-exercise-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 13px;
}

.exercise-item-name {
    color: var(--text-primary);
    font-weight: 500;
}

.exercise-item-sets {
    color: var(--text-secondary);
    font-family: monospace;
}

/* ==========================================================================
   Sección: Tab de Historial & Perfil
   ========================================================================== */
.profile-card {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 16px;
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 20px;
}

.profile-avatar {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: var(--gradient-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 0 15px rgba(0, 245, 212, 0.2);
}

.profile-avatar span {
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 22px;
    color: var(--bg-black);
}

.profile-meta h2 {
    font-family: var(--font-display);
    font-size: 18px;
    font-weight: 700;
}

.panel-section-title {
    font-family: var(--font-display);
    font-size: 14px;
    font-weight: 600;
    text-transform: uppercase;
    color: var(--text-secondary);
    letter-spacing: 1px;
    margin-bottom: 12px;
    margin-top: 10px;
}

.stats-panel-large {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 20px;
    margin-bottom: 20px;
}

.volume-stat-container {
    display: flex;
    justify-content: space-around;
}

.volume-stat-item {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.volume-stat-item .val {
    font-family: var(--font-display);
    font-size: 26px;
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.volume-stat-item .lbl {
    font-size: 11px;
    color: var(--text-secondary);
    margin-top: 4px;
}

.history-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-bottom: 24px;
}

.history-item {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 14px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.history-item-left {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.history-item-title {
    font-size: 14px;
    font-weight: 600;
}

.history-item-date {
    font-size: 11px;
    color: var(--text-muted);
}

.history-item-right {
    text-align: right;
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.history-item-volume {
    font-size: 13px;
    font-weight: 700;
    color: var(--color-neon-teal);
}

.history-item-duration {
    font-size: 11px;
    color: var(--text-secondary);
}

.profile-settings-actions {
    margin-top: 30px;
}

/* ==========================================================================
   Bottom Navigation Bar Styles
   ========================================================================== */
#bottom-nav {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 72px;
    background-color: rgba(18, 18, 22, 0.95);
    border-top: 1px solid var(--border-color);
    backdrop-filter: blur(10px);
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    z-index: 50;
    padding: 8px 12px;
}

.nav-item {
    background: transparent;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 4px;
    transition: all 0.2s ease;
}

.nav-icon {
    width: 22px;
    height: 22px;
    stroke-width: 2;
    transition: stroke 0.2s ease, transform 0.2s ease;
}

.nav-lbl {
    font-size: 10px;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    font-family: var(--font-display);
    transition: color 0.2s ease;
}

.nav-item.active {
    color: var(--color-neon-teal);
}

.nav-item.active .nav-icon {
    transform: translateY(-2px);
    stroke: var(--color-neon-teal);
    filter: drop-shadow(0 0 4px rgba(0, 245, 212, 0.3));
}

.nav-item.active .nav-lbl {
    color: var(--color-neon-teal);
}

/* ==========================================================================
   Workout Player Overlay (Active Workout)
   ========================================================================== */
#screen-workout-active {
    z-index: 200;
    display: flex;
    flex-direction: column;
    background-color: var(--bg-black);
}

.workout-active-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 20px;
    border-bottom: 1px solid var(--border-color);
}

.btn-icon-back,
.btn-icon-close {
    background: transparent;
    border: none;
    color: var(--text-primary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: 8px;
    transition: background-color 0.2s ease;
}

.btn-icon-back:active,
.btn-icon-close:active {
    background-color: var(--bg-card);
}

.workout-header-title {
    text-align: center;
}

.workout-header-title h3 {
    font-family: var(--font-display);
    font-size: 15px;
    font-weight: 700;
}

.workout-header-title span {
    font-size: 12px;
    color: var(--color-neon-teal);
    font-family: monospace;
    font-weight: 600;
}

.workout-header-progress {
    font-family: var(--font-display);
    font-size: 13px;
    font-weight: 600;
    color: var(--text-secondary);
}

.workout-active-body {
    flex: 1;
    overflow-y: auto;
    padding: 20px;
}

.exercise-panel {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.exercise-visual-container {
    position: relative;
    height: 180px;
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
}

.exercise-skeleton-loader {
    width: 100%;
    height: 100%;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
}

.muscles-targeted-badge {
    position: absolute;
    top: 12px;
    left: 12px;
    background-color: rgba(123, 44, 191, 0.15);
    color: var(--color-neon-purple);
    border: 1px solid rgba(123, 44, 191, 0.3);
    padding: 4px 8px;
    font-size: 10px;
    border-radius: 30px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.btn-video-guide {
    position: absolute;
    bottom: 12px;
    right: 12px;
    background-color: rgba(0, 0, 0, 0.7);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    font-size: 11px;
    padding: 6px 12px;
    border-radius: 30px;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 6px;
    font-weight: 600;
    transition: background-color 0.2s ease;
}

.btn-video-guide:active {
    background-color: var(--color-neon-teal);
    color: var(--bg-black);
}

.exercise-info-section h2 {
    font-family: var(--font-display);
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 6px;
}

.exercise-instructions {
    line-height: 1.4;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

/* Tabla de Registro de Series */
.sets-tracker-section {
    margin-top: 10px;
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 14px;
    overflow: hidden;
}

.sets-header {
    display: grid;
    grid-template-columns: 0.8fr 1.5fr 1.2fr 1fr 1fr;
    padding: 10px 14px;
    background-color: var(--bg-obsidian);
    border-bottom: 1px solid var(--border-color);
    font-size: 10px;
    color: var(--text-secondary);
    font-weight: 600;
    text-align: center;
    letter-spacing: 0.5px;
}

.col-set { text-align: left; }
.col-objective { text-align: center; }

.sets-list {
    display: flex;
    flex-direction: column;
}

.set-row {
    display: grid;
    grid-template-columns: 0.8fr 1.5fr 1.2fr 1fr 1fr;
    padding: 10px 14px;
    align-items: center;
    border-bottom: 1px solid var(--border-color);
    text-align: center;
    font-size: 13px;
    transition: background-color 0.2s ease;
}

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

.set-num {
    font-weight: 600;
    text-align: left;
}

.set-obj {
    color: var(--text-secondary);
    font-family: monospace;
}

.set-input {
    background-color: var(--bg-obsidian);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    width: 80%;
    padding: 6px;
    border-radius: 6px;
    text-align: center;
    font-size: 12px;
}

.set-input:focus {
    outline: none;
    border-color: var(--color-neon-teal);
}

/* Custom Checkbox */
.set-checkbox {
    width: 24px;
    height: 24px;
    border-radius: 6px;
    border: 2px solid var(--border-color);
    background-color: var(--bg-obsidian);
    cursor: pointer;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s ease;
}

.set-checkbox::after {
    content: "✓";
    font-size: 14px;
    color: var(--bg-black);
    display: none;
}

.set-row.completed {
    background-color: rgba(0, 245, 212, 0.02);
}

.set-row.completed .set-checkbox {
    background-color: var(--color-neon-teal);
    border-color: var(--color-neon-teal);
}

.set-row.completed .set-checkbox::after {
    display: block;
}

/* Rest Timer Panel (Overlay) */
.rest-timer-panel {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    z-index: 300;
    animation: fadeIn 0.3s ease;
}

.rest-timer-blur {
    position: absolute;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.85);
    backdrop-filter: blur(15px);
    z-index: 0;
}

.rest-timer-content {
    position: relative;
    z-index: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
}

.rest-timer-number {
    font-family: var(--font-display);
    font-size: 96px;
    font-weight: 700;
    color: var(--color-neon-teal);
    text-shadow: 0 0 20px rgba(0, 245, 212, 0.3);
    line-height: 1;
    margin-bottom: 12px;
}

.rest-timer-actions {
    display: flex;
    gap: 16px;
}

/* Footer Active Workout */
.workout-active-footer {
    padding: 16px 20px;
    border-top: 1px solid var(--border-color);
}

.footer-actions {
    display: flex;
    justify-content: space-between;
}

/* ==========================================================================
   Workout Summary Screen
   ========================================================================== */
#screen-workout-summary {
    z-index: 400;
    background-color: var(--bg-black);
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 24px;
}

#summary-confetti {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 1;
}

.summary-card {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 24px;
    padding: 32px 24px;
    text-align: center;
    width: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 16px;
    z-index: 2;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.6);
}

.summary-icon {
    font-size: 60px;
    margin-bottom: 8px;
    animation: bounce 2s infinite alternate;
}

@keyframes bounce {
    0% { transform: translateY(0); }
    100% { transform: translateY(-10px); }
}

.summary-title {
    font-family: var(--font-display);
    font-size: 24px;
    font-weight: 700;
}

.summary-subtitle {
    line-height: 1.4;
    max-width: 320px;
}

.summary-stats-box {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    width: 100%;
    background-color: var(--bg-obsidian);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 16px 8px;
    margin-top: 12px;
}

.summary-stat-element {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.summary-stat-element .val {
    font-family: var(--font-display);
    font-size: 16px;
    font-weight: 700;
    color: var(--color-neon-teal);
}

.summary-stat-element .lbl {
    font-size: 10px;
    color: var(--text-secondary);
    text-transform: uppercase;
}

.summary-badge-unlock {
    position: relative;
    background: linear-gradient(135deg, rgba(123, 44, 191, 0.15) 0%, rgba(255, 0, 127, 0.15) 100%);
    border: 1px solid rgba(123, 44, 191, 0.3);
    border-radius: 12px;
    padding: 12px;
    width: 100%;
    margin-top: 10px;
    overflow: hidden;
}

.badge-text {
    font-size: 12px;
    font-weight: 600;
    color: var(--text-primary);
}

/* ==========================================================================
   Modales (Video Overlay)
   ========================================================================== */
.modal {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 500;
    display: flex;
    align-items: flex-end;
    justify-content: center;
    transition: opacity 0.25s ease;
}

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

.modal-overlay {
    position: absolute;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.85);
    backdrop-filter: blur(8px);
}

.modal-wrapper {
    position: relative;
    background-color: var(--bg-card);
    border-top-left-radius: 24px;
    border-top-right-radius: 24px;
    width: 100%;
    max-height: 80%;
    z-index: 10;
    display: flex;
    flex-direction: column;
    border-top: 1px solid var(--border-color);
    box-shadow: 0 -10px 30px rgba(0, 0, 0, 0.5);
    transform: translateY(100%);
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.modal:not(.hidden) .modal-wrapper {
    transform: translateY(0);
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 20px;
    border-bottom: 1px solid var(--border-color);
}

.modal-header h3 {
    font-family: var(--font-display);
    font-size: 16px;
    font-weight: 700;
}

.btn-icon-close {
    color: var(--text-secondary);
}

.modal-body {
    padding: 20px;
    overflow-y: auto;
}

.video-container {
    width: 100%;
    position: relative;
    padding-bottom: 56.25%; /* Aspect ratio 16:9 */
    height: 0;
    background-color: var(--bg-black);
    border-radius: 12px;
    overflow: hidden;
    border: 1px solid var(--border-color);
}

.video-container iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border: none;
}

/* ==========================================================================
   ILUSTRACIONES ANIMADAS DE EJERCICIO (CSS/SVG)
   ========================================================================== */
/* ==========================================================================
   ILUSTRACIONES ANIMADAS DE EJERCICIO (3D IMAGES & NEON OVERLAYS)
   ========================================================================== */
.animation-box {
    width: 100%;
    height: 250px;
    position: relative;
    margin: 0 auto;
    border-radius: 12px;
    overflow: hidden;
    background-color: var(--bg-obsidian);
}

.img-3d-wrapper {
    width: 100%;
    height: 100%;
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
}

.exercise-3d-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 12px;
    filter: brightness(0.9) contrast(1.1);
}

.neon-overlay-container {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 10;
}

/* Neon Glow Arrows */
.neon-arrow {
    position: absolute;
    width: 4px;
    height: 60px;
    background-color: var(--color-neon-teal);
    box-shadow: 0 0 15px var(--color-neon-teal), 0 0 30px var(--color-neon-teal);
    border-radius: 2px;
}
.neon-arrow::after {
    content: "";
    position: absolute;
    bottom: -4px;
    left: -8px;
    border-left: 10px solid transparent;
    border-right: 10px solid transparent;
    border-top: 15px solid var(--color-neon-teal);
    filter: drop-shadow(0 0 10px var(--color-neon-teal));
}

.down-arrow {
    top: 30%;
    left: 50%;
    transform: translateX(-50%);
    animation: bounceDown 1.5s infinite ease-in-out;
}
@keyframes bounceDown {
    0%, 100% { transform: translate(-50%, 0); opacity: 0.5; }
    50% { transform: translate(-50%, 20px); opacity: 1; }
}

.up-arrow {
    top: 40%;
    left: 50%;
    transform: translateX(-50%) rotate(180deg);
    animation: bounceUp 1.5s infinite ease-in-out;
}
@keyframes bounceUp {
    0%, 100% { transform: translate(-50%, 0) rotate(180deg); opacity: 0.5; }
    50% { transform: translate(-50%, -20px) rotate(180deg); opacity: 1; }
}

.diagonal-arrow {
    top: 40%;
    left: 40%;
    transform: rotate(135deg);
    animation: bounceDiag 1.5s infinite ease-in-out;
}
@keyframes bounceDiag {
    0%, 100% { transform: translate(0, 0) rotate(135deg); opacity: 0.5; }
    50% { transform: translate(15px, 15px) rotate(135deg); opacity: 1; }
}

/* Neon Weights */
.neon-weight {
    position: absolute;
    top: 20%;
    right: 20%;
    font-family: var(--font-display);
    font-size: 20px;
    font-weight: 800;
    color: var(--text-primary);
    text-shadow: 0 0 10px var(--color-neon-teal), 0 0 20px var(--color-neon-teal);
    background: rgba(0, 0, 0, 0.4);
    padding: 10px 15px;
    border-radius: 8px;
    border: 2px solid var(--color-neon-teal);
    box-shadow: inset 0 0 15px rgba(0, 245, 212, 0.5), 0 0 15px rgba(0, 245, 212, 0.5);
    animation: pulseWeight 2s infinite alternate;
}
@keyframes pulseWeight {
    0% { transform: scale(1); box-shadow: inset 0 0 15px rgba(0, 245, 212, 0.5), 0 0 15px rgba(0, 245, 212, 0.5); }
    100% { transform: scale(1.1); box-shadow: inset 0 0 25px rgba(0, 245, 212, 0.8), 0 0 30px rgba(0, 245, 212, 0.8); }
}

/* ==========================================================================
   Evolución AURA: Panel de Administrador & Selector de Rutinas Manuales
   ========================================================================== */

/* 1. Selector de Rutina Manual */
.manual-routine-selector-card {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 16px;
    margin-bottom: 20px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.4);
}
.selector-header {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 8px;
}
.selector-dot {
    width: 8px;
    height: 8px;
    background-color: var(--color-neon-teal);
    border-radius: 50%;
    box-shadow: 0 0 8px var(--color-neon-teal);
    animation: pulseGlow 1.5s infinite ease-in-out;
}
@keyframes pulseGlow {
    0%, 100% { opacity: 0.5; transform: scale(1); }
    50% { opacity: 1; transform: scale(1.2); }
}
.selector-title {
    font-family: var(--font-display);
    font-size: 14px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}
.selector-desc {
    margin-bottom: 12px;
    line-height: 1.3;
}
.routine-selector-grid {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: 8px;
}
.routine-select-btn {
    background-color: var(--bg-obsidian);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    padding: 10px 6px;
    cursor: pointer;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 4px;
    transition: all 0.25s ease;
    text-align: center;
}
.routine-select-btn:hover {
    border-color: rgba(255, 255, 255, 0.2);
}
.routine-select-btn.active {
    background: linear-gradient(135deg, rgba(123, 44, 191, 0.15) 0%, rgba(0, 245, 212, 0.15) 100%);
    border-color: var(--color-neon-teal);
    box-shadow: 0 0 10px rgba(0, 245, 212, 0.15);
}
.routine-btn-title {
    font-family: var(--font-display);
    font-size: 11px;
    font-weight: 700;
    color: var(--text-primary);
}
.routine-btn-subtitle {
    font-size: 8px;
    color: var(--text-secondary);
}
.routine-select-btn.active .routine-btn-title {
    color: var(--color-neon-teal);
}

/* 2. Panel del Administrador */
.admin-ai-panel {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 18px;
    margin-bottom: 20px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.4);
}
.admin-ai-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 16px;
}
.ai-title-group {
    display: flex;
    align-items: center;
    gap: 8px;
}
.ai-pulse-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background-color: var(--color-neon-purple);
    box-shadow: 0 0 10px var(--color-neon-purple);
    animation: pulsePurple 2s infinite ease-in-out;
}
@keyframes pulsePurple {
    0%, 100% { transform: scale(1); opacity: 0.6; }
    50% { transform: scale(1.2); opacity: 1; }
}
.ai-title-group h3 {
    font-family: var(--font-display);
    font-size: 14px;
    font-weight: 700;
}
.ai-stats-summary {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 8px;
    background-color: var(--bg-obsidian);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 12px 8px;
    text-align: center;
}
.ai-stat-box {
    display: flex;
    flex-direction: column;
    gap: 4px;
}
.ai-stat-lbl {
    font-size: 9px;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.3px;
}
.ai-stat-val {
    font-family: var(--font-display);
    font-size: 16px;
    font-weight: 700;
}
.text-neon-teal, .cluster-val-committed { color: var(--color-neon-teal) !important; }
.text-neon-yellow, .cluster-val-irregular { color: #ffb703 !important; }
.text-neon-pink, .cluster-val-highrisk { color: var(--color-neon-pink) !important; }

/* Tabla de Administrador */
.admin-table-section {
    margin-bottom: 24px;
}
.table-responsive {
    width: 100%;
    overflow-x: auto;
    border-radius: 14px;
    border: 1px solid var(--border-color);
    background-color: var(--bg-card);
}
.admin-table {
    width: 100%;
    border-collapse: collapse;
    text-align: left;
    font-size: 12px;
}
.admin-table th {
    background-color: var(--bg-obsidian);
    color: var(--text-secondary);
    font-family: var(--font-display);
    font-weight: 600;
    padding: 12px 14px;
    font-size: 10px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    border-bottom: 1px solid var(--border-color);
}
.admin-table td {
    padding: 12px 14px;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-primary);
    white-space: nowrap;
}
.admin-table tr:last-child td {
    border-bottom: none;
}
.admin-table tr {
    transition: background-color 0.2s ease;
}
.admin-table tr:hover {
    background-color: rgba(255,255,255,0.02);
}
.user-name-col {
    font-weight: 600;
}
.user-level-col {
    color: var(--text-secondary);
    text-transform: capitalize;
}

/* Badges de Cluster */
.cluster-badge {
    padding: 4px 8px;
    border-radius: 30px;
    font-size: 10px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    display: inline-block;
    text-align: center;
}
.cluster-badge.committed {
    background-color: rgba(0, 245, 212, 0.08);
    color: var(--color-neon-teal);
    border: 1px solid rgba(0, 245, 212, 0.25);
    box-shadow: 0 0 6px rgba(0, 245, 212, 0.08);
}
.cluster-badge.irregular {
    background-color: rgba(255, 183, 3, 0.08);
    color: #ffb703;
    border: 1px solid rgba(255, 183, 3, 0.25);
}
.cluster-badge.highrisk {
    background-color: rgba(255, 0, 127, 0.08);
    color: var(--color-neon-pink);
    border: 1px solid rgba(255, 0, 127, 0.25);
    box-shadow: 0 0 6px rgba(255, 0, 127, 0.08);
}

/* Notificaciones en el Admin */
.admin-notifications-section {
    margin-bottom: 30px;
}
.admin-notifications-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}
.admin-notification-card {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-left: 4px solid var(--color-neon-pink);
    border-radius: 12px;
    padding: 14px;
    position: relative;
    box-shadow: 0 4px 15px rgba(0,0,0,0.3);
    transition: all 0.3s ease;
}
.admin-notification-card.sent {
    border-left-color: var(--color-neon-teal);
    opacity: 0.8;
}
.notif-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 6px;
}
.notif-user-tag {
    font-family: var(--font-display);
    font-size: 12px;
    font-weight: 700;
    color: var(--text-primary);
}
.notif-risk-badge {
    font-size: 9px;
    color: var(--color-neon-pink);
    font-weight: 600;
    text-transform: uppercase;
}
.admin-notification-card.sent .notif-risk-badge {
    color: var(--color-neon-teal);
}
.notif-message {
    font-size: 11px;
    color: var(--text-secondary);
    line-height: 1.4;
    margin-bottom: 10px;
}
.notif-actions {
    display: flex;
    justify-content: flex-end;
}
.btn-notif-send {
    background: transparent;
    border: 1px solid var(--color-neon-pink);
    color: var(--color-neon-pink);
    padding: 4px 10px;
    border-radius: 20px;
    font-size: 10px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
}
.btn-notif-send:hover {
    background-color: var(--color-neon-pink);
    color: var(--bg-black);
}
.admin-notification-card.sent .btn-notif-send {
    border-color: var(--color-neon-teal);
    color: var(--color-neon-teal);
}
.admin-notification-card.sent .btn-notif-send:hover {
    background-color: var(--color-neon-teal);
    color: var(--bg-black);
}

/* 3. Estilos para el calculador de IMC en Onboarding */
.imc-preview-card {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 12px 16px;
    margin-top: 14px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    animation: fadeIn 0.3s ease;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
    width: 100%;
}
.imc-preview-card.hidden {
    display: none !important;
}
.imc-result {
    display: flex;
    align-items: center;
    gap: 8px;
}
.imc-lbl {
    font-size: 12px;
    color: var(--text-secondary);
    text-transform: uppercase;
    font-family: var(--font-display);
    letter-spacing: 0.5px;
}
.imc-val {
    font-family: var(--font-display);
    font-size: 20px;
    font-weight: 700;
    color: var(--color-neon-teal);
    text-shadow: 0 0 10px rgba(0, 245, 212, 0.2);
}
.imc-category-badge {
    padding: 3px 10px;
    border-radius: 30px;
    font-size: 10px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}
.imc-category-badge.bajo {
    background-color: rgba(0, 180, 216, 0.1);
    color: var(--color-cyan);
    border: 1px solid rgba(0, 180, 216, 0.3);
}
.imc-category-badge.normal {
    background-color: rgba(0, 245, 212, 0.1);
    color: var(--color-neon-teal);
    border: 1px solid rgba(0, 245, 212, 0.3);
}
.imc-category-badge.sobrepeso {
    background-color: rgba(255, 183, 3, 0.1);
    color: #ffb703;
    border: 1px solid rgba(255, 183, 3, 0.3);
}
.imc-category-badge.obesidad {
    background-color: rgba(255, 0, 127, 0.1);
    color: var(--color-neon-pink);
    border: 1px solid rgba(255, 0, 127, 0.3);
}
#imc-desc {
    font-size: 10px;
    line-height: 1.3;
    margin: 0;
}

/* 4. Estilos Adicionales Premium de IA y Administración */
.admin-table-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 16px;
    width: 100%;
}

.admin-select-filter {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 8px 14px;
    border-radius: 8px;
    font-size: 11px;
    font-weight: 600;
    outline: none;
    cursor: pointer;
    font-family: var(--font-display);
    text-transform: uppercase;
    transition: all 0.25s ease;
}

.admin-select-filter:focus, 
.admin-select-filter:hover {
    border-color: var(--color-neon-teal);
    box-shadow: 0 0 10px rgba(0, 245, 212, 0.15);
}

.preview-stats-grid {
    display: flex;
    gap: 20px;
    justify-content: space-around;
    width: 100%;
    margin-bottom: 12px;
}

.bfp-result {
    display: flex;
    align-items: center;
    gap: 8px;
}

#bfp-value {
    color: var(--color-neon-pink);
    text-shadow: 0 0 10px rgba(255, 0, 127, 0.25);
}

/* Transiciones de Onboarding */
#group-hip {
    animation: slideDown 0.3s cubic-bezier(0.4, 0, 0.2, 1) forwards;
}

@keyframes slideDown {
    from { opacity: 0; transform: translateY(-10px); }
    to { opacity: 1; transform: translateY(0); }
}