:root {
    --primary: #db2777;
    --primary-hover: #be185d;
    --secondary: #64748b;
    --accent: #f43f5e;
    --pink-50: #fff1f2;
    --pink-100: #ffe4e6;
    --pink-200: #fecdd3;
    --pink-300: #fda4af;
    --pink-400: #fb7185;
    --pink-500: #f43f5e;
    --pink-600: #e11d48;
    --pink-700: #be123c;
    --bg-main: #fff5f7;
    --card-bg: #ffffff;
    --text-main: #1e293b;
    --text-muted: #831843;
    --border: #fce7f3;
    --border-hover: #fbcfe8;
    
    /* Engineering Indicators */
    --cut-color: #e11d48;
    --cut-bg: #fff1f2;
    --cut-border: #fecdd3;
    --fill-color: #059669;
    --fill-bg: #f0fdf4;
    --fill-border: #bbf7d0;
    --neutral-color: #64748b;
    
    --shadow-sm: 0 2px 4px rgba(219, 39, 119, 0.05);
    --shadow-md: 0 4px 14px rgba(219, 39, 119, 0.08), 0 2px 6px rgba(219, 39, 119, 0.04);
    --shadow-lg: 0 10px 25px -3px rgba(219, 39, 119, 0.15), 0 4px 6px -4px rgba(219, 39, 119, 0.08);
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    background-color: var(--bg-main);
    /* Patrón rosadito delicado de puntos y rejilla geométrica */
    background-image: 
        radial-gradient(#f472b6 0.85px, transparent 0.85px), 
        radial-gradient(#fbcfe8 0.85px, var(--bg-main) 0.85px);
    background-size: 24px 24px;
    background-position: 0 0, 12px 12px;
    color: var(--text-main);
    line-height: 1.5;
    padding: 0;
    margin: 0;
}

.app-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 24px 20px 48px;
}

/* Header con degradado rosado y patrón de textura */
.app-header {
    background: linear-gradient(135deg, #be185d 0%, #db2777 45%, #f472b6 100%);
    position: relative;
    overflow: hidden;
    color: white;
    padding: 30px 28px;
    border-radius: 18px;
    margin-bottom: 28px;
    box-shadow: 0 10px 25px -4px rgba(190, 24, 93, 0.35);
    border: 1px solid rgba(255, 255, 255, 0.3);
}

/* Patrón de fondo geométrico sutil en el header */
.app-header::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: radial-gradient(circle at 20% 50%, rgba(255, 255, 255, 0.15) 0%, transparent 40%),
                      radial-gradient(circle at 80% 80%, rgba(255, 255, 255, 0.2) 0%, transparent 35%);
    pointer-events: none;
}

.app-header h1 {
    font-size: 28px;
    font-weight: 800;
    letter-spacing: -0.5px;
    margin-bottom: 6px;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.15);
    display: flex;
    align-items: center;
    gap: 10px;
}

.app-header p {
    font-size: 15px;
    color: #ffe4e6;
    font-weight: 500;
}

.header-badges {
    display: flex;
    gap: 10px;
    margin-top: 16px;
    flex-wrap: wrap;
}

.badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 12px;
    font-weight: 600;
    padding: 5px 12px;
    border-radius: 20px;
    background: rgba(255, 255, 255, 0.22);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    color: #ffffff;
    border: 1px solid rgba(255, 255, 255, 0.3);
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.05);
}

/* Grid layout */
.main-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 24px;
}

@media (min-width: 1024px) {
    .main-grid {
        grid-template-columns: 1.15fr 0.85fr;
    }
}

/* Card con borde rosadito y sutil sombra pastel */
.card {
    background: var(--card-bg);
    border: 1px solid #fce7f3;
    border-radius: 16px;
    padding: 22px;
    margin-bottom: 24px;
    box-shadow: 0 4px 16px rgba(244, 114, 182, 0.1);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.card:hover {
    box-shadow: 0 6px 20px rgba(244, 114, 182, 0.16);
}

.card-title {
    font-size: 17px;
    font-weight: 700;
    color: #831843;
    margin-bottom: 16px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-bottom: 12px;
    border-bottom: 1px solid #fce7f3;
}

.card-title .card-icon {
    margin-right: 8px;
    font-size: 18px;
}

/* Botones de acción */
.table-actions {
    display: flex;
    gap: 8px;
    margin-bottom: 14px;
    flex-wrap: wrap;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    font-size: 13px;
    font-weight: 600;
    padding: 8px 14px;
    border-radius: 9px;
    border: 1px solid transparent;
    cursor: pointer;
    transition: all 0.18s ease-in-out;
}

.btn-primary {
    background: linear-gradient(135deg, #db2777 0%, #be185d 100%);
    color: white;
    box-shadow: 0 2px 8px rgba(219, 39, 119, 0.25);
}
.btn-primary:hover {
    background: linear-gradient(135deg, #be185d 0%, #9d174d 100%);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(219, 39, 119, 0.35);
}

.btn-secondary {
    background-color: #fff1f2;
    color: #9d174d;
    border-color: #fbcfe8;
}
.btn-secondary:hover {
    background-color: #fce7f3;
    border-color: #f472b6;
    color: #831843;
    transform: translateY(-1px);
}

.btn-danger {
    background-color: #fee2e2;
    color: #b91c1c;
    border-color: #fca5a5;
}
.btn-danger:hover {
    background-color: #fecaca;
}

.btn-lg {
    padding: 15px 30px;
    font-size: 16px;
    font-weight: 800;
    border-radius: 12px;
    letter-spacing: 0.5px;
}

.btn-calculate {
    background: linear-gradient(135deg, #ec4899 0%, #db2777 50%, #be185d 100%);
    color: white;
    width: 100%;
    box-shadow: 0 6px 18px rgba(219, 39, 119, 0.4);
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.15);
}
.btn-calculate:hover {
    background: linear-gradient(135deg, #db2777 0%, #be185d 50%, #9d174d 100%);
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(219, 39, 119, 0.5);
}

.btn-reset {
    background-color: #fff5f7;
    color: #9d174d;
    border: 1px solid #fbcfe8;
    width: 100%;
    font-weight: 700;
}
.btn-reset:hover {
    background-color: #fce7f3;
    color: #831843;
    border-color: #f472b6;
}

/* Tabla responsiva rosada */
.table-responsive {
    width: 100%;
    max-height: 280px;
    overflow-y: auto;
    overflow-x: auto;
    border: 1px solid #fce7f3;
    border-radius: 10px;
    background: white;
}

.data-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 13px;
    min-width: 380px;
}

.data-table th {
    background: #fff1f2;
    color: #831843;
    font-weight: 700;
    padding: 9px 12px;
    text-align: left;
    position: sticky;
    top: 0;
    z-index: 10;
    border-bottom: 2px solid #fbcfe8;
}

.data-table td {
    padding: 7px 10px;
    border-bottom: 1px solid #fff1f2;
}

.data-table tr:hover td {
    background-color: #fff9fa;
}

.data-table input {
    width: 100%;
    padding: 6px 9px;
    border: 1px solid #fbcfe8;
    border-radius: 6px;
    font-size: 13px;
    font-family: inherit;
    background: #fffbfa;
    transition: all 0.15s ease;
}
.data-table input:focus {
    outline: none;
    background: #ffffff;
    border-color: #ec4899;
    box-shadow: 0 0 0 3px rgba(236, 72, 153, 0.2);
}

.btn-icon {
    padding: 4px 8px;
    background: transparent;
    border: none;
    color: #f472b6;
    cursor: pointer;
    border-radius: 6px;
    font-weight: bold;
    font-size: 14px;
    transition: all 0.15s ease;
}
.btn-icon:hover {
    color: #be123c;
    background: #ffe4e6;
}

/* Selector de Modalidad Rosado */
.mode-selector {
    display: flex;
    gap: 12px;
    margin-bottom: 16px;
}

.mode-option {
    flex: 1;
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 11px 16px;
    border: 1px solid #fce7f3;
    border-radius: 10px;
    background: #fff5f7;
    cursor: pointer;
    font-size: 13px;
    font-weight: 700;
    color: #9d174d;
    transition: all 0.18s ease;
}

.mode-option.active {
    border-color: #ec4899;
    background: #fdf2f8;
    color: #be185d;
    box-shadow: 0 2px 8px rgba(236, 72, 153, 0.18);
}

.mode-option input {
    accent-color: #db2777;
    cursor: pointer;
}

.form-group {
    margin-bottom: 14px;
}

.form-group label {
    display: block;
    font-size: 13px;
    font-weight: 700;
    margin-bottom: 6px;
    color: #831843;
}

.form-control {
    width: 100%;
    padding: 9px 13px;
    border: 1px solid #fbcfe8;
    border-radius: 8px;
    font-size: 14px;
    background: #fffbfa;
}
.form-control:focus {
    outline: none;
    background: #ffffff;
    border-color: #ec4899;
    box-shadow: 0 0 0 3px rgba(236, 72, 153, 0.2);
}

/* Tarjetas de Resultados KPI */
.results-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 14px;
    margin-bottom: 20px;
}

@media (min-width: 640px) {
    .results-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

.kpi-card {
    padding: 16px 18px;
    border-radius: 12px;
    border: 1px solid #fce7f3;
    background: #ffffff;
    box-shadow: 0 2px 8px rgba(244, 114, 182, 0.08);
}

.kpi-card.cut {
    background: #fff1f2;
    border-color: #fecdd3;
}
.kpi-card.cut .kpi-value {
    color: #e11d48;
}

.kpi-card.fill {
    background: #f0fdf4;
    border-color: #bbf7d0;
}
.kpi-card.fill .kpi-value {
    color: #059669;
}

.kpi-card.balance {
    background: #fff5f7;
    border-color: #fbcfe8;
}
.kpi-card.balance .kpi-value {
    color: #9d174d;
}

.kpi-title {
    font-size: 11px;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 0.6px;
    color: #9d174d;
    margin-bottom: 5px;
}

.kpi-value {
    font-size: 23px;
    font-weight: 800;
    color: #831843;
    line-height: 1.2;
}

.kpi-unit {
    font-size: 12px;
    font-weight: 700;
    color: #9d174d;
    margin-left: 2px;
}

/* Área de Visualización 3D */
.viz-container {
    width: 100%;
    min-height: 480px;
    border-radius: 12px;
    overflow: hidden;
    background: #ffffff;
    border: 1px solid #fce7f3;
    position: relative;
    box-shadow: 0 4px 14px rgba(244, 114, 182, 0.08);
}

.viz-toolbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 16px;
    background: #fff5f7;
    border-bottom: 1px solid #fce7f3;
    flex-wrap: wrap;
    gap: 8px;
}

.legend-bar {
    display: flex;
    gap: 14px;
    align-items: center;
    font-size: 12px;
    font-weight: 700;
}

.legend-item {
    display: flex;
    align-items: center;
    gap: 6px;
    color: #831843;
}

.legend-dot {
    width: 12px;
    height: 12px;
    border-radius: 3px;
}
.legend-dot.cut { background: #e11d48; }
.legend-dot.fill { background: #059669; }
.legend-dot.neutral { background: #94a3b8; }

/* Alertas */
.alert {
    padding: 13px 18px;
    border-radius: 10px;
    font-size: 13px;
    font-weight: 600;
    margin-bottom: 18px;
    display: none;
}
.alert-error {
    background: #fff1f2;
    color: #9f1239;
    border: 1px solid #fecdd3;
}
.alert-success {
    background: #fdf2f8;
    color: #9d174d;
    border: 1px solid #fbcfe8;
}

.hidden {
    display: none !important;
}

.action-buttons-group {
    display: flex;
    gap: 12px;
    margin-top: 14px;
}

/* Spinner */
.spinner {
    display: inline-block;
    width: 16px;
    height: 16px;
    border: 2px solid rgba(255, 255, 255, 0.35);
    border-radius: 50%;
    border-top-color: white;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}