/* ==========================================================================
   Central Keeper - Sistema de Estilos Móvil Táctil Ergónomico (Mobile First)
   ========================================================================== */

:root {
    --bg-main: #0b132b;
    --bg-card: #1c2541;
    --bg-card-hover: #2a385b;
    --bg-input: #0b132b;
    
    --accent: #38bdf8;
    --accent-hover: #0284c7;
    --accent-glow: rgba(56, 189, 248, 0.25);
    
    --success: #22c55e;
    --success-bg: rgba(34, 197, 94, 0.15);
    --warning: #f59e0b;
    --danger: #ef4444;
    
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    
    --border-color: #334155;
    --border-radius: 16px;
    --border-radius-sm: 10px;
    
    --shadow-main: 0 10px 25px -5px rgba(0, 0, 0, 0.4);
    --transition-fast: all 0.15s ease-in-out;
}

/* Reset Estándar */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    -webkit-tap-highlight-color: rgba(56, 189, 248, 0.2);
}

html, body {
    background-color: var(--bg-main);
    color: var(--text-primary);
    min-height: 100vh;
    width: 100%;
    overflow-x: hidden;
}

body {
    display: flex;
    flex-direction: column;
    padding-top: env(safe-area-inset-top);
    padding-bottom: calc(40px + env(safe-area-inset-bottom));
}

/* Header Móvil */
.header {
    background-color: rgba(28, 37, 65, 0.98);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 100;
    padding: 0.75rem 0.85rem;
    padding-top: calc(0.75rem + env(safe-area-inset-top));
}

.header-container {
    max-width: 1000px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 0.5rem;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    font-size: 1.05rem;
    font-weight: 800;
    color: var(--text-primary);
    text-decoration: none;
    white-space: nowrap;
}

.logo-badge {
    background: linear-gradient(135deg, var(--accent), #6366f1);
    color: #fff;
    font-size: 0.7rem;
    padding: 0.2rem 0.5rem;
    border-radius: 20px;
    font-weight: 700;
}

.header-subtitle {
    display: flex;
    align-items: center;
    gap: 0.3rem;
}

/* Container Principal */
.container {
    max-width: 1000px;
    margin: 0 auto;
    padding: 0.85rem 0.75rem;
    width: 100%;
    flex: 1;
}

/* Selector de Días */
.days-nav {
    display: flex;
    gap: 0.4rem;
    overflow-x: auto;
    padding: 0.25rem 0 0.75rem 0;
    margin-bottom: 0.85rem;
    scrollbar-width: none;
    -webkit-overflow-scrolling: touch;
}

.days-nav::-webkit-scrollbar {
    display: none;
}

.day-btn {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    padding: 0.6rem 0.85rem;
    border-radius: var(--border-radius-sm);
    font-weight: 700;
    cursor: pointer;
    touch-action: manipulation;
    white-space: nowrap;
    transition: var(--transition-fast);
    display: flex;
    flex-direction: column;
    align-items: center;
    min-width: 66px;
    flex-shrink: 0;
}

.day-btn:active {
    transform: scale(0.95);
    background-color: var(--bg-card-hover);
}

.day-btn.active {
    background-color: var(--accent);
    color: #0b132b;
    border-color: var(--accent);
    box-shadow: 0 0 12px var(--accent-glow);
}

.day-btn.is-today .day-short::after {
    content: ' •';
    color: var(--warning);
    font-weight: bold;
}

/* Tarjetas */
.card {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 1rem;
    margin-bottom: 1.1rem;
    box-shadow: var(--shadow-main);
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.routine-title-box {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    flex: 1;
    min-width: 180px;
}

.routine-title-input {
    background: transparent;
    border: none;
    border-bottom: 2px solid transparent;
    color: var(--text-primary);
    font-size: 1.15rem;
    font-weight: 800;
    padding: 0.2rem 0;
    width: 100%;
}

.routine-title-input:focus {
    outline: none;
    border-bottom-color: var(--accent);
}

/* Lista de Ejercicios */
.exercise-list {
    display: flex;
    flex-direction: column;
    gap: 0.85rem;
}

.exercise-item {
    background-color: rgba(11, 19, 43, 0.8);
    border: 1px solid var(--border-color);
    border-radius: 14px;
    padding: 0.85rem;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.exercise-main-row {
    display: flex;
    gap: 0.75rem;
    align-items: flex-start;
}

.exercise-thumb {
    width: 72px;
    height: 72px;
    min-width: 72px;
    border-radius: 10px;
    overflow: hidden;
    background-color: #050b18;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    touch-action: manipulation;
    position: relative;
    border: 1px solid var(--border-color);
}

.exercise-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.exercise-thumb .play-badge {
    position: absolute;
    bottom: 2px;
    right: 2px;
    background: rgba(0, 0, 0, 0.85);
    color: var(--accent);
    font-size: 0.65rem;
    padding: 2px 4px;
    border-radius: 4px;
    font-weight: 800;
}

.exercise-info {
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
    flex: 1;
}

.exercise-title {
    font-size: 1rem;
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1.35;
}

.exercise-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 0.35rem;
    font-size: 0.8rem;
    margin-top: 0.2rem;
}

.exercise-badge {
    background-color: rgba(56, 189, 248, 0.12);
    color: var(--accent);
    padding: 0.2rem 0.55rem;
    border-radius: 6px;
    font-weight: 700;
    font-size: 0.75rem;
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;

    &.weight {
        background-color: rgba(245, 158, 11, 0.15);
        color: var(--warning);
    }
}

.exercise-actions {
    display: flex;
    gap: 0.4rem;
    width: 100%;
    justify-content: flex-end;
    border-top: 1px solid rgba(51, 65, 85, 0.6);
    padding-top: 0.6rem;
    margin-top: 0.2rem;
}

/* Botones Móviles Táctiles (Optimizado para Touch) */
.btn {
    background-color: var(--bg-card-hover);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    padding: 0.6rem 0.9rem;
    border-radius: var(--border-radius-sm);
    font-weight: 700;
    cursor: pointer;
    touch-action: manipulation;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.4rem;
    transition: var(--transition-fast);
    text-decoration: none;
    font-size: 0.85rem;
    min-height: 42px;
}

.btn:active {
    transform: scale(0.96);
    filter: brightness(1.2);
}

.btn-primary {
    background: linear-gradient(135deg, var(--accent), #0284c7);
    color: #0b132b;
    border: none;
    font-weight: 800;
}

.btn-success {
    background: linear-gradient(135deg, var(--success), #16a34a);
    color: #fff;
    border: none;
    font-weight: 800;
}

.btn-danger {
    background-color: rgba(239, 68, 68, 0.18);
    color: var(--danger);
    border-color: rgba(239, 68, 68, 0.35);
}

.btn-sm {
    padding: 0.45rem 0.75rem;
    font-size: 0.8rem;
    min-height: 38px;
}

/* Modals Móviles (Sin Bloqueos de Puntero) */
.modal-backdrop {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: rgba(5, 11, 24, 0.88);
    backdrop-filter: blur(8px);
    z-index: 1000;
    display: none;
    align-items: flex-end;
    justify-content: center;
}

.modal-backdrop.active {
    display: flex;
}

@media (min-width: 640px) {
    .modal-backdrop.active {
        align-items: center;
        padding: 1rem;
    }
}

.modal-content {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 20px 20px 0 0;
    max-width: 650px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
    padding: 1.25rem;
    box-shadow: 0 -10px 30px rgba(0, 0, 0, 0.7);
    display: flex;
    flex-direction: column;
    gap: 0.9rem;
    animation: slideUp 0.2s ease-out;
}

@keyframes slideUp {
    from { transform: translateY(100%); }
    to { transform: translateY(0); }
}

@media (min-width: 640px) {
    .modal-content {
        border-radius: var(--border-radius);
        animation: none;
    }
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 0.6rem;
}

.modal-close {
    background: var(--bg-card-hover);
    border: none;
    color: var(--text-primary);
    font-size: 1.4rem;
    cursor: pointer;
    touch-action: manipulation;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* GIF Demo Viewer */
.gif-viewer {
    width: 100%;
    max-height: 280px;
    border-radius: var(--border-radius-sm);
    overflow: hidden;
    background-color: #050b18;
    display: flex;
    align-items: center;
    justify-content: center;
}

.gif-viewer img {
    max-width: 100%;
    max-height: 280px;
    object-fit: contain;
}

/* Form inputs */
.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
}

.form-group label {
    font-size: 0.8rem;
    font-weight: 700;
    color: var(--text-secondary);
}

.form-control {
    background-color: var(--bg-input);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 0.75rem 0.9rem;
    border-radius: var(--border-radius-sm);
    font-size: 0.95rem;
}

.form-control:focus {
    outline: none;
    border-color: var(--accent);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.75rem;
}

@media (max-width: 480px) {
    .header-subtitle {
        display: flex;
    }
    .form-row {
        grid-template-columns: 1fr;
    }
}