:root {
    /* Brand Colors - Premium Dark Purple Theme */
    --primary: #8b5cf6; /* Vibrant purple */
    --primary-hover: #7c3aed;
    --primary-glow: rgba(139, 92, 246, 0.4);
    
    --bg-dark: #0f0c20; /* Very dark purple/blue */
    --bg-panel: #1a162e;
    --bg-panel-hover: #231d3d;
    
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    
    --border-color: rgba(255, 255, 255, 0.08);
    
    --success: #10b981;
    --danger: #ef4444;
    --warning: #f59e0b;

    --font-family: 'Inter', system-ui, -apple-system, sans-serif;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-sm: 8px;
    
    --shadow-subtle: 0 4px 20px rgba(0,0,0,0.2);
    --shadow-glow: 0 0 20px var(--primary-glow);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: var(--font-family);
    background-color: var(--bg-dark);
    color: var(--text-main);
    line-height: 1.5;
    overflow-x: hidden;
}

/* Views */
.view {
    display: none;
    min-height: 100vh;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.view.active {
    display: flex;
    opacity: 1;
}

/* Login View */
#login-view {
    justify-content: center;
    align-items: center;
    background: radial-gradient(circle at 50% 50%, var(--bg-panel) 0%, var(--bg-dark) 100%);
}

.login-container {
    width: 100%;
    max-width: 400px;
    padding: 20px;
}

.login-box {
    background: rgba(26, 22, 46, 0.7);
    backdrop-filter: blur(12px);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 40px;
    text-align: center;
    box-shadow: var(--shadow-subtle);
    animation: slideUp 0.5s ease forwards;
}

.login-logo {
    width: 120px;
    height: 120px;
    object-fit: contain;
    border-radius: var(--radius-md);
    margin-bottom: 20px;
}

.login-box h2 {
    margin-bottom: 24px;
    font-weight: 600;
}

/* Main App Layout */
#app-view {
    flex-direction: row;
}

.sidebar {
    width: 260px;
    background-color: var(--bg-panel);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    padding: 20px;
}

.sidebar-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 40px;
}

.sidebar-logo {
    width: 40px;
    height: 40px;
    border-radius: 8px;
    object-fit: cover;
}

.brand-name {
    font-size: 1.2rem;
    font-weight: 700;
    letter-spacing: 0.5px;
    background: linear-gradient(to right, #fff, var(--primary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.sidebar-nav {
    display: flex;
    flex-direction: column;
    gap: 8px;
    flex-grow: 1;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    color: var(--text-muted);
    text-decoration: none;
    border-radius: var(--radius-md);
    transition: all 0.2s ease;
    font-weight: 500;
}

.nav-item ion-icon {
    font-size: 1.3rem;
}

.nav-item:hover {
    color: var(--text-main);
    background-color: rgba(139, 92, 246, 0.1);
}

.nav-item.active {
    color: white;
    background-color: var(--primary);
    box-shadow: 0 4px 12px var(--primary-glow);
}

.sidebar-footer {
    border-top: 1px solid var(--border-color);
    padding-top: 20px;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.user-info {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.9rem;
    color: var(--text-muted);
}

/* Main Content */
.main-content {
    flex-grow: 1;
    padding: 40px;
    overflow-y: auto;
    background: radial-gradient(circle at top right, rgba(139, 92, 246, 0.05), transparent 40%);
    max-height: 100vh;
}

.content-section {
    display: none;
    animation: fadeIn 0.3s ease;
}

.content-section.active {
    display: block;
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
}

.section-header h2 {
    font-size: 1.8rem;
    font-weight: 600;
}

/* Cards */
.card {
    background-color: var(--bg-panel);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 24px;
    box-shadow: var(--shadow-subtle);
}

/* Forms */
.form-row {
    display: flex;
    gap: 20px;
    margin-bottom: 20px;
}

.form-row .input-group,
.form-row .form-group {
    flex: 1;
    margin-bottom: 0;
}

.input-group,
.form-group {
    margin-bottom: 20px;
    text-align: left;
}

.input-group label,
.form-group label {
    display: block;
    margin-bottom: 8px;
    font-size: 0.9rem;
    color: var(--text-muted);
    font-weight: 500;
}

input[type="text"],
input[type="password"],
input[type="tel"],
input[type="date"],
input[type="number"],
input[type="datetime-local"],
textarea,
select {
    width: 100%;
    height: 48px;
    padding: 12px 16px;
    background-color: rgba(0, 0, 0, 0.2);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-main);
    font-family: var(--font-family);
    transition: all 0.2s ease;
    font-size: 1rem;
    box-sizing: border-box !important;
    max-width: 100%;
}

input[type="date"],
input[type="datetime-local"] {
    -webkit-appearance: none;
    appearance: none;
    width: 100%;
}

textarea {
    height: 120px;
    resize: vertical;
}

input:focus,
textarea:focus,
select:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px var(--primary-glow);
}

.radio-group {
    display: flex;
    gap: 20px;
}

.radio-label {
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
}

.resumen-valor {
    margin: 20px 0;
    padding: 16px;
    background-color: rgba(139, 92, 246, 0.1);
    border: 1px dashed var(--primary);
    border-radius: var(--radius-md);
    text-align: right;
    font-size: 1.2rem;
    font-weight: 600;
}

#valor-total-display {
    color: var(--primary);
    font-size: 1.5rem;
}

.form-actions {
    display: flex;
    justify-content: flex-end;
    gap: 12px;
    margin-top: 30px;
}

/* Buttons */
.btn {
    padding: 10px 20px;
    border: none;
    border-radius: var(--radius-md);
    font-family: var(--font-family);
    font-weight: 600;
    font-size: 0.95rem;
    cursor: pointer;
    transition: all 0.2s ease;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    justify-content: center;
}

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

.btn-primary:hover {
    background-color: var(--primary-hover);
    box-shadow: var(--shadow-glow);
    transform: translateY(-1px);
}

.btn-secondary {
    background-color: rgba(255, 255, 255, 0.1);
    color: white;
}

.btn-secondary:hover {
    background-color: rgba(255, 255, 255, 0.15);
}

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

.btn-outline:hover {
    border-color: var(--text-muted);
    background-color: rgba(255, 255, 255, 0.05);
}

.btn-danger {
    background-color: rgba(239, 68, 68, 0.1);
    color: var(--danger);
}
.btn-danger:hover {
    background-color: var(--danger);
    color: white;
}

.btn-sm {
    padding: 6px 12px;
    font-size: 0.85rem;
}

.btn-block {
    width: 100%;
}

/* Tables */
.table-responsive {
    overflow-x: auto;
}

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

.data-table th,
.data-table td {
    padding: 16px;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

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

.data-table tbody tr {
    transition: background-color 0.2s ease;
}

.data-table tbody tr:hover {
    background-color: var(--bg-panel-hover);
}

.status-badge {
    padding: 4px 8px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
}
.status-pendiente {
    background: rgba(245, 158, 11, 0.2);
    color: var(--warning);
}
.status-completada {
    background: rgba(16, 185, 129, 0.2);
    color: var(--success);
}

/* Utils */
.error-msg {
    color: var(--danger);
    font-size: 0.9rem;
    margin-top: 10px;
    min-height: 20px;
}

.filter-input {
    width: auto;
    display: inline-block;
}

/* Print Modal */
.modal {
    display: none;
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(0,0,0,0.8);
    backdrop-filter: blur(4px);
    z-index: 1000;
    justify-content: center;
    align-items: center;
}
.modal.active {
    display: flex;
}
.modal-content {
    background: var(--bg-panel);
    width: 90%;
    max-width: 600px;
    border-radius: var(--radius-lg);
    padding: 30px;
    max-height: 90vh;
    overflow-y: auto;
}
.print-area {
    color: var(--text-main);
}
.print-header {
    border-bottom: 2px solid var(--border-color);
    padding-bottom: 20px;
    margin-bottom: 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.print-detalle {
    margin: 20px 0;
    padding: 15px;
    background: rgba(255,255,255,0.05);
    border-radius: var(--radius-md);
}
.print-totales {
    text-align: right;
    margin-top: 20px;
    border-top: 1px dashed var(--border-color);
    padding-top: 20px;
}
.total-big {
    font-size: 1.5rem;
    color: var(--primary);
}
.modal-actions {
    margin-top: 30px;
    display: flex;
    justify-content: flex-end;
    gap: 10px;
}

/* Print CSS */
@media print {
    body * {
        visibility: hidden;
    }
    .print-area, .print-area * {
        visibility: visible;
        -webkit-print-color-adjust: exact !important;
        print-color-adjust: exact !important;
    }
    .print-area {
        position: absolute;
        left: 0;
        top: 0;
        width: 100%;
        max-width: 100% !important;
        padding: 0 !important;
        border: none !important;
        margin: 0 !important;
    }
    .no-print {
        display: none !important;
    }
}

/* ================= RESPONSIVE (MOBILE) ================= */
@media (max-width: 768px) {
    #app-view {
        flex-direction: column;
        height: 100vh;
        overflow: hidden;
    }
    
    .sidebar {
        width: 100%;
        height: auto;
        padding: 15px;
        display: flex;
        flex-direction: row;
        justify-content: space-between;
        align-items: center;
        border-right: none;
        border-bottom: 1px solid var(--border-color);
        z-index: 10;
    }
    
    .sidebar-header {
        margin-bottom: 0;
    }
    
    .sidebar-logo {
        width: 32px;
        height: 32px;
    }

    .brand-name {
        font-size: 1.1rem;
    }
    
    .sidebar-footer {
        display: flex;
        align-items: center;
        gap: 10px;
    }

    .user-info span {
        display: none; /* Ocultamos el nombre de usuario en celular para ahorrar espacio */
    }
    
    .sidebar-nav {
        display: flex;
        flex-direction: row;
        position: fixed;
        bottom: 0;
        left: 0;
        width: 100%;
        background-color: var(--bg-panel);
        border-top: 1px solid var(--border-color);
        overflow-x: auto;
        gap: 5px;
        margin: 0;
        padding: 10px;
        z-index: 1000;
        scrollbar-width: none;
    }
    
    .sidebar-nav::-webkit-scrollbar {
        display: none;
    }
    
    .nav-item {
        flex: 1 1 0;
        display: flex;
        flex-direction: column;
        align-items: center;
        justify-content: center;
        padding: 6px 4px;
        margin-bottom: 0;
        font-size: 0.7rem;
        white-space: nowrap;
        gap: 2px;
        border-radius: var(--radius-sm);
    }
    
    .nav-item ion-icon {
        font-size: 1.2rem;
        margin-right: 0 !important;
    }

    .main-content {
        padding: 15px;
        padding-bottom: 90px; /* Dejar espacio para la barra inferior */
        flex: 1;
        overflow-y: auto;
        overflow-x: hidden;
        width: 100vw;
        max-width: 100%;
    }

    .form-row {
        display: flex;
        flex-direction: column;
        gap: 15px;
    }
    
    .form-row .input-group,
    .form-row .form-group {
        margin-bottom: 0;
        width: 100%;
        flex: none; /* Prevenir comportamiento extraño de flex height en column */
    }
    
    .header-actions {
        flex-direction: column;
        gap: 10px;
        align-items: stretch;
        width: 100%;
    }

    .section-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 10px;
        width: 100%;
    }
    
    .card {
        width: 100%;
        max-width: 100%;
        overflow: hidden;
        padding: 15px;
    }
    
    /* Asegurar que las tablas se puedan deslizar de lado a lado */
    .table-responsive {
        width: 100%;
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
    }

    th, td {
        white-space: nowrap;
        font-size: 0.85rem;
        padding: 12px 10px;
    }

    /* Modales y vista previa */
    .login-box {
        width: 90%;
        padding: 30px 20px;
    }
    
    .modal-content.print-area {
        width: 95%;
        padding: 20px !important;
    }
    
    .print-body {
        grid-template-columns: 1fr !important;
    }
    
    .print-totales > div {
        width: 100% !important;
    }
}

/* Animations */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}
@keyframes slideUp {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}
::-webkit-scrollbar-track {
    background: var(--bg-dark);
}
::-webkit-scrollbar-thumb {
    background: var(--bg-panel-hover);
    border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
    background: var(--primary);
}