/* =========================================================================
   🏢 GOOGLE STITCH STYLES : CORPORATE ELEGANCE (LEVEL 2)
      =========================================================================
   ÍNDICE MAESTRO DE ARQUITECTURA VISUAL (AI PARSER)
   -------------------------------------------------------------------------
   Este archivo establece las bases del diseño Cero-JS.
   
   0. Variables Globales (:root)
   1. Bases Estructurales (.stitch-container, .stitch-section-title...)
   2. Tipografía Semántica (.stitch-h1, .stitch-body...)
   3. Botones y Acciones (.stitch-btn, .stitch-btn-primary...)
   4. Formularios y Controles (.stitch-input, .stitch-toggle, .stitch-range)
   5. Feedback Visual (.stitch-badge, .stitch-avatar, .flex-row)
   6. Progress & Listas (.stitch-progress-wrapper, .stitch-list)
   7. Estructuras de Datos
      > Tarjetas         (.stitch-card)
      > Tablas           (.stitch-table-wrapper, .stitch-table)
      > Pestañas/Tabs    (.stitch-tabs)
      > Métricas         (.stitch-metric-card, .stitch-metric-value)
      > Modales          (.stitch-modal-overlay, .stitch-modal)
   8. Componentes Avanzados Interactivos CSS-Only
      > Skeleton Loaders (.stitch-skeleton)
      > Tooltips Nativos ([data-stitch-tooltip])
      > Sliders (Flechas) (.stitch-slider-wrapper)
      > Galería Autoflow (.stitch-gallery)
      > Menú de Pegado   (.stitch-sticky-nav)
   9. Sistema de Grid Layout (.stitch-grid, .stitch-col-span-*)
   10. Navegación Avanzada (.stitch-breadcrumb, .stitch-dropdown, .stitch-sidebar-toggle-input)
   11. Data-Viz (Gráficos) (.stitch-bar-chart, .stitch-donut, .stitch-timeline)
   12. Feedback Pro (.stitch-toast, .stitch-empty-state, .stitch-steps)
   13. Formularios Pro (.stitch-input-icon-wrapper, .stitch-chips-input, .stitch-dropzone)
========================================================================= */

:root {
    --stitch-color-text: #172b4d;
    --stitch-color-text-muted: #5e6c84;
    --stitch-color-bg: #f4f5f7;
    --stitch-color-surface: #ffffff;
    --stitch-color-border: #dfe1e6;
    --stitch-color-primary: #0052cc;
    --stitch-color-primary-hover: #0047b3;
    --stitch-color-danger: #de350b;
    --stitch-color-success: #00875a;
    
    --stitch-radius-sm: 4px;
    --stitch-radius-md: 8px;
    --stitch-space-sm: 8px;
    --stitch-space-md: 16px;
    --stitch-space-lg: 24px;
    
    --stitch-shadow-sm: 0 1px 2px rgba(9, 30, 66, 0.05);
    --stitch-shadow-md: 0 4px 8px -2px rgba(9, 30, 66, 0.08), 0 0 1px rgba(9, 30, 66, 0.08);
    --stitch-shadow-hover: 0 8px 16px -4px rgba(9, 30, 66, 0.12), 0 0 1px rgba(9, 30, 66, 0.08);
}

/* Base Components (Z-index Reactivo) */
.stitch-container { padding: var(--stitch-space-lg); background-color: var(--stitch-color-surface); border: 1px solid var(--stitch-color-border); border-radius: var(--stitch-radius-md); box-shadow: var(--stitch-shadow-md); transition: box-shadow 0.3s ease, transform 0.3s ease; scroll-margin-top: 40px; }
.stitch-container:hover { box-shadow: var(--stitch-shadow-hover); transform: translateY(-2px); }

.stitch-section-title { font-size: 1.25rem; font-weight: 500; margin: 0 0 var(--stitch-space-md) 0; padding-bottom: var(--stitch-space-sm); border-bottom: 2px solid var(--stitch-color-border); }
.stitch-h1 { font-size: 2rem; font-weight: 700; margin: 0 0 16px 0; color: var(--stitch-color-text); }
.stitch-h2 { font-size: 1.5rem; font-weight: 500; margin: 0 0 12px 0; color: var(--stitch-color-text); }
.stitch-body { font-size: 1rem; line-height: 1.6; color: var(--stitch-color-text); margin: 0 0 16px 0; }
.stitch-muted { color: var(--stitch-color-text-muted); font-size: 0.875rem; display: block; }

/* Botones Elevados */
.stitch-btn-group { display: flex; gap: 12px; flex-wrap: wrap; }
.stitch-btn { padding: 10px 20px; font-size: 0.875rem; font-weight: 500; border-radius: var(--stitch-radius-sm); cursor: pointer; transition: all 0.2s ease; font-family: inherit; }
.stitch-btn-primary { background-color: var(--stitch-color-primary); color: #ffffff; border: none; box-shadow: var(--stitch-shadow-sm); }
.stitch-btn-primary:hover { background-color: var(--stitch-color-primary-hover); box-shadow: var(--stitch-shadow-md); transform: translateY(-1px); }
.stitch-btn-secondary { background-color: #ebecf0; color: var(--stitch-color-text); border: none; font-weight: 500;}
.stitch-btn-secondary:hover { background-color: #dfe1e6; }
.stitch-btn-outline { background-color: transparent; color: var(--stitch-color-primary); border: 2px solid var(--stitch-color-primary); }
.stitch-btn-outline:hover { background-color: rgba(0, 82, 204, 0.05); }

/* Forms Corporate */
.stitch-form-group { display: flex; flex-direction: column; gap: var(--stitch-space-sm); margin-bottom: var(--stitch-space-md); max-width: 400px; }
.stitch-label { font-size: 0.875rem; font-weight: 600; color: var(--stitch-color-text); margin-bottom: 4px; display:inline-block;}
.stitch-input, .stitch-select { padding: 12px 14px; font-size: 0.875rem; border: 2px solid var(--stitch-color-border); border-radius: var(--stitch-radius-sm); font-family: inherit; transition: border-color 0.2s, box-shadow 0.2s; background-color: #fafbfc; color: var(--stitch-color-text); }
.stitch-input:hover, .stitch-select:hover { background-color: #ebecf0; }
.stitch-input:focus, .stitch-select:focus { outline: none; border-color: var(--stitch-color-primary); background-color: var(--stitch-color-surface); box-shadow: 0 0 0 3px rgba(0, 82, 204, 0.1); }

/* Controles Base */
.stitch-control-row { display: flex; align-items: center; gap: 8px; margin-bottom: 12px; font-size: 0.875rem; color: var(--stitch-color-text);}
.stitch-control-row input[type="checkbox"], .stitch-control-row input[type="radio"] { accent-color: var(--stitch-color-primary); cursor: pointer; width: 16px; height: 16px; margin:0;}
.stitch-toggle { position: relative; display: inline-block; width: 36px; height: 20px; }
.stitch-toggle input { opacity: 0; width: 0; height: 0; margin:0; }
.stitch-slider { position: absolute; cursor: pointer; top: 0; left: 0; right: 0; bottom: 0; background-color: var(--stitch-color-border); transition: .3s; border-radius: 20px; }
.stitch-slider:before { position: absolute; content: ""; height: 14px; width: 14px; left: 3px; bottom: 3px; background-color: white; transition: .3s; border-radius: 50%; box-shadow: var(--stitch-shadow-sm); }
.stitch-toggle input:checked + .stitch-slider { background-color: var(--stitch-color-primary); }
.stitch-toggle input:checked + .stitch-slider:before { transform: translateX(16px); }

/* Badges */
.flex-row { display: flex; gap: 12px; flex-wrap: wrap; align-items: center; }
.stitch-badge { display: inline-flex; align-items: center; padding: 4px 10px; font-size: 0.75rem; font-weight: 700; border-radius: 4px; text-transform: uppercase; }
.stitch-badge-primary { background-color: #deebff; color: #0747a6; border: 1px solid #b3d4ff; }
.stitch-badge-success { background-color: #e3fcef; color: #006644; border: 1px solid #abf5d1; }
.stitch-badge-danger { background-color: #ffebe6; color: #bf2600; border: 1px solid #ffbdad; }


/* ==========================================================
   NUEVOS COMPONENTES CORPORATIVOS (Sombras y Reacción Hover)
   ========================================================== */

/* Tarjetas Elevadas */
.stitch-card { border: 1px solid var(--stitch-color-border); border-radius: var(--stitch-radius-md); background-color: var(--stitch-color-surface); box-shadow: var(--stitch-shadow-sm); overflow: hidden; display: flex; flex-direction: column; transition: box-shadow 0.3s, transform 0.3s; }
.stitch-card:hover { box-shadow: var(--stitch-shadow-md); transform: translateY(-2px); }
.stitch-card-header { padding: var(--stitch-space-md); border-bottom: 1px solid var(--stitch-color-border); font-weight: 600; background-color: var(--stitch-color-surface); }
.stitch-card-body { padding: var(--stitch-space-md); flex: 1; }
.stitch-card-footer { padding: var(--stitch-space-md); border-top: 1px solid var(--stitch-color-border); background-color: var(--stitch-color-surface); display: flex; justify-content: flex-end; gap: 8px; }

/* Tablas Data Grid */
.stitch-table-wrapper { width: 100%; overflow-x: auto; border: 1px solid var(--stitch-color-border); border-radius: var(--stitch-radius-md); box-shadow: var(--stitch-shadow-sm); }
.stitch-table { width: 100%; border-collapse: collapse; text-align: left; font-size: 0.875rem; background-color: var(--stitch-color-surface); }
.stitch-table th, .stitch-table td { padding: 12px var(--stitch-space-md); border-bottom: 1px solid var(--stitch-color-border); }
.stitch-table th { background-color: #fafbfc; font-weight: 600; color: var(--stitch-color-text-muted); }
.stitch-table tbody tr:hover { background-color: #f4f5f7; }
.stitch-table tbody tr:last-child td { border-bottom: none; }

/* Pestañas Nav */
.stitch-tabs { display: flex; border-bottom: 2px solid var(--stitch-color-border); gap: 24px; margin-bottom: var(--stitch-space-md); }
.stitch-tab { padding: 12px 4px; cursor: pointer; font-weight: 600; font-size: 0.875rem; color: var(--stitch-color-text-muted); border-bottom: 2px solid transparent; transition: color 0.2s, border-color 0.2s; margin-bottom: -2px; }
.stitch-tab:hover { color: var(--stitch-color-text); }
.stitch-tab-active { color: var(--stitch-color-primary); border-bottom-color: var(--stitch-color-primary); }

/* Dashboards Metrics */
.stitch-metric-card { padding: var(--stitch-space-md); border: 1px solid var(--stitch-color-border); border-radius: var(--stitch-radius-md); background-color: var(--stitch-color-surface); box-shadow: var(--stitch-shadow-sm); transition: transform 0.3s, box-shadow 0.3s; }
.stitch-metric-card:hover { box-shadow: var(--stitch-shadow-md); transform: translateY(-2px); }
.stitch-metric-label { font-size: 0.875rem; font-weight: 600; color: var(--stitch-color-text-muted); margin-bottom: 8px; display: block; text-transform: uppercase; letter-spacing: 0.5px;}
.stitch-metric-value { font-size: 2rem; font-weight: 700; color: var(--stitch-color-text); display: flex; align-items: center; gap: 12px; }

/* Modal Corporativo Flotante */
.stitch-modal-overlay { position: relative; background-color: rgba(9, 30, 66, 0.54); padding: 40px; display: flex; justify-content: center; align-items: center; border-radius: var(--stitch-radius-md); }
.stitch-modal { background-color: var(--stitch-color-surface); border-radius: var(--stitch-radius-md); width: 100%; max-width: 400px; box-shadow: 0 24px 48px rgba(9, 30, 66, 0.2); overflow: hidden; border: 1px solid var(--stitch-color-border); }

/* ==========================================================
   🧩 COMPONENTES AVANZADOS CSS-ONLY
   ========================================================== */

/* 1. Progress Bar (Nativa) */
.stitch-progress {
    width: 100%;
    height: 8px;
    background-color: var(--stitch-color-border);
    border-radius: var(--stitch-radius-round);
    overflow: hidden;
    position: relative;
}

.stitch-progress-bar {
    height: 100%;
    background-color: var(--stitch-color-primary);
    border-radius: var(--stitch-radius-round);
    transition: width 0.3s ease;
}

/* 2. Skeleton Loader (Efecto Shimmer) */
@keyframes stitch-shimmer {
    0% {
        background-position: -1000px 0;
    }

    100% {
        background-position: 1000px 0;
    }
}

.stitch-skeleton {
    background: linear-gradient(90deg, var(--stitch-color-bg-alt) 25%, var(--stitch-color-border) 50%, var(--stitch-color-bg-alt) 75%);
    background-size: 1000px 100%;
    animation: stitch-shimmer 2s infinite linear;
    border-radius: var(--stitch-radius-sm);
    color: transparent !important;
    min-height: 1rem;
    border: none !important;
    box-shadow: none !important;
}

/* 3. Tooltips Hover Nativos */
[data-stitch-tooltip] {
    position: relative;
    cursor: help;
    border-bottom: 1px dotted var(--stitch-color-text-muted);
}

[data-stitch-tooltip]:hover::before {
    content: attr(data-stitch-tooltip);
    position: absolute;
    bottom: 100%;
    left: 50%;
    transform: translateX(-50%) translateY(-8px);
    background-color: var(--stitch-color-text);
    color: var(--stitch-color-bg);
    padding: 6px 12px;
    border-radius: var(--stitch-radius-sm);
    font-size: 0.8rem;
    white-space: nowrap;
    z-index: 10;
    pointer-events: none;
    opacity: 1;
    font-weight: 500;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

[data-stitch-tooltip]:hover::after {
    content: '';
    position: absolute;
    bottom: 100%;
    left: 50%;
    transform: translateX(-50%);
    border-width: 6px;
    border-style: solid;
    border-color: var(--stitch-color-text) transparent transparent transparent;
    z-index: 10;
}

/* 4. Carrusel Puro (Scroll Snap) */
.stitch-carousel {
    display: flex;
    gap: var(--stitch-space-md);
    overflow-x: auto;
    scroll-snap-type: x mandatory;
    scroll-behavior: smooth;
    padding-bottom: 16px;
    -ms-overflow-style: none;
    scrollbar-width: thin;
}

.stitch-carousel::-webkit-scrollbar {
    height: 6px;
}

.stitch-carousel::-webkit-scrollbar-track {
    background: transparent;
}

.stitch-carousel::-webkit-scrollbar-thumb {
    background: var(--stitch-color-border);
    border-radius: var(--stitch-radius-round);
}

.stitch-carousel-item {
    scroll-snap-align: start;
    flex: 0 0 calc(85% - var(--stitch-space-md));
    min-width: 260px;
    position: relative;
}

/* 5. Carrusel de Anclajes (Flechas CSS) */
.stitch-slider-wrapper {
    position: relative;
    width: 100%;
    max-width: 600px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.stitch-slider-slides {
    display: flex;
    overflow-x: auto;
    scroll-snap-type: x mandatory;
    scroll-behavior: smooth;
    border-radius: var(--stitch-radius-md);
    -ms-overflow-style: none;
    scrollbar-width: none;
}

.stitch-slider-slides::-webkit-scrollbar {
    display: none;
}

.stitch-slide {
    scroll-snap-align: center;
    flex: 0 0 100%;
    min-width: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
    background-color: var(--stitch-color-bg-alt);
    height: 200px;
    font-weight: 500;
}

.stitch-slider-arrow {
    background-color: var(--stitch-color-bg);
    border: 1px solid var(--stitch-color-border);
    color: var(--stitch-color-text);
    width: 36px;
    height: 36px;
    display: flex;
    justify-content: center;
    align-items: center;
    border-radius: 50%;
    text-decoration: none;
    font-weight: bold;
    transition: background 0.2s;
    flex-shrink: 0;
}

.stitch-slider-arrow:hover {
    background-color: var(--stitch-color-bg-alt);
}

/* 6. Galería Fotográfica (CSS Grid) */
.stitch-gallery {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    gap: var(--stitch-space-md);
}

.stitch-gallery-img {
    width: 100%;
    height: 140px;
    border-radius: var(--stitch-radius-md);
    background-color: var(--stitch-color-border);
    object-fit: cover;
    transition: transform 0.3s ease;
}

.stitch-gallery-img:hover {
    transform: scale(1.03);
}

/* 7. Menú Flotante Sticky */
.stitch-sticky-nav {
    position: sticky;
    top: 0;
    z-index: 100;
    background-color: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(8px);
    border-bottom: 1px solid var(--stitch-color-border);
    padding: 12px 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 24px;
    border-radius: var(--stitch-radius-md);
}

.stitch-sticky-links {
    display: flex;
    gap: 16px;
}

.stitch-sticky-links a {
    color: var(--stitch-color-text-muted);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.875rem;
    transition: color 0.2s;
}

.stitch-sticky-links a:hover {
    color: var(--stitch-color-primary);
}

/* ==========================================================
   📐 SISTEMA DE GRID (LAYOUT RESPONSIVE PARA IA)
   ========================================================== */
.stitch-grid {
    display: grid;
    gap: var(--stitch-space-lg);
    grid-template-columns: 1fr;
    width: 100%;
}

.stitch-grid-auto {
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

@media (min-width: 768px) {
    .stitch-grid-2 {
        grid-template-columns: repeat(2, 1fr);
    }

    .stitch-grid-3 {
        grid-template-columns: repeat(3, 1fr);
    }

    .stitch-grid-4 {
        grid-template-columns: repeat(4, 1fr);
    }

    .stitch-grid-1-2 {
        grid-template-columns: 1fr 2fr;
    }

    .stitch-grid-2-1 {
        grid-template-columns: 2fr 1fr;
    }

    /* Utilidades de Envergadura (Spanning) */
    .stitch-col-span-2 {
        grid-column: span 2;
    }

    .stitch-col-span-3 {
        grid-column: span 3;
    }

    .stitch-col-span-full {
        grid-column: 1 / -1;
    }
}

/* ==========================================================
   🚀 COMPONENTES PRO: NAVEGACIÓN AVANZADA
   ========================================================== */
/* Breadcrumbs */
.stitch-breadcrumb { display: flex; gap: 8px; font-size: 0.875rem; color: var(--stitch-color-text-muted); list-style: none; padding: 0; margin: 0; align-items: center; flex-wrap: wrap;}
.stitch-breadcrumb a { color: var(--stitch-color-primary); text-decoration: none; font-weight: 500; }
.stitch-breadcrumb a:hover { text-decoration: underline; }
.stitch-breadcrumb li + li::before { content: '/'; margin-right: 8px; color: var(--stitch-color-border); font-weight: bold;}

/* Mega Menu / Dropdown */
.stitch-dropdown { position: relative; display: inline-block; }
.stitch-dropdown-menu { display: none; position: absolute; top: 100%; left: 0; background: var(--stitch-color-bg); box-shadow: 0 4px 12px rgba(0,0,0,0.1); border-radius: var(--stitch-radius-md); padding: var(--stitch-space-sm); min-width: 200px; z-index: 50; border: 1px solid var(--stitch-color-border); flex-direction: column; gap: 4px; margin-top: 4px;}
.stitch-dropdown:hover .stitch-dropdown-menu, .stitch-dropdown:focus-within .stitch-dropdown-menu { display: flex; }
.stitch-dropdown-item { padding: 8px 12px; text-decoration: none; color: var(--stitch-color-text); font-size: 0.875rem; border-radius: var(--stitch-radius-sm); transition: background 0.2s; }
.stitch-dropdown-item:hover { background: var(--stitch-color-bg-alt); color: var(--stitch-color-primary); }

/* Sidebar Colapsable (CSS-Only Checkbox Hack) */
.stitch-sidebar-toggle-input { display: none; }
.stitch-sidebar-drawer { position: fixed; top: 0; left: -300px; width: 280px; height: 100vh; background: var(--stitch-color-bg); box-shadow: 4px 0 24px rgba(0,0,0,0.15); transition: left 0.3s cubic-bezier(0.4, 0, 0.2, 1); z-index: 1000; padding: var(--stitch-space-lg); padding-top: 64px; overflow-y: auto;}
.stitch-sidebar-toggle-input:checked ~ .stitch-sidebar-drawer { left: 0; }
.stitch-sidebar-overlay { position: fixed; top: 0; left: 0; width: 100vw; height: 100vh; background: rgba(32,33,36,0.6); backdrop-filter: blur(2px); z-index: 999; opacity: 0; pointer-events: none; transition: opacity 0.3s; }
.stitch-sidebar-toggle-input:checked ~ .stitch-sidebar-overlay { opacity: 1; pointer-events: auto; }
.stitch-drawer-close { position: absolute; top: 16px; right: 16px; cursor: pointer; padding: 8px; font-weight: bold; border-radius: var(--stitch-radius-sm); color: var(--stitch-color-text-muted); transition: background 0.2s;}
.stitch-drawer-close:hover { background: var(--stitch-color-bg-alt); color: var(--stitch-color-text);}

/* ==========================================================
   📊 DATA-VIZ (VISUALIZACIÓN DE DATOS CSS)
   ========================================================== */
/* Bar Chart */
.stitch-bar-chart { display: flex; flex-direction: column; gap: 12px; width: 100%; }
.stitch-bar-row { display: flex; align-items: center; gap: 12px; font-size: 0.875rem; }
.stitch-bar-label { width: 80px; font-weight: 500; color: var(--stitch-color-text); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; flex-shrink:0;}
.stitch-bar-track { flex: 1; height: 24px; background: var(--stitch-color-bg-alt); border-radius: var(--stitch-radius-sm); overflow: hidden; border: 1px solid var(--stitch-color-border);}
.stitch-bar-fill { height: 100%; background: var(--stitch-color-primary); transition: width 0.5s ease-out; display: flex; align-items: center; padding-left: 8px; color: white; font-weight: bold; font-size: 0.75rem;}
.stitch-bar-value { width: 40px; text-align: right; color: var(--stitch-color-text-muted); font-weight: 600; flex-shrink:0;}

/* Donut Chart */
.stitch-donut { width: 120px; height: 120px; border-radius: 50%; display: flex; align-items: center; justify-content: center; position: relative; box-shadow: inset 0 0 0 1px var(--stitch-color-border);}
.stitch-donut::before { content: ""; width: 80px; height: 80px; border-radius: 50%; background: var(--stitch-color-bg); position: absolute; box-shadow: 0 0 0 1px var(--stitch-color-border);}
.stitch-donut-value { position: relative; font-weight: 700; font-size: 1.5rem; color: var(--stitch-color-text); }

/* Timeline */
.stitch-timeline { border-left: 2px solid var(--stitch-color-border); padding-left: 24px; margin-left: 12px; display: flex; flex-direction: column; gap: 24px; margin-top: 16px;}
.stitch-timeline-item { position: relative; }
.stitch-timeline-item::before { content: ""; position: absolute; left: -31px; top: 0; width: 12px; height: 12px; border-radius: 50%; background: var(--stitch-color-primary); border: 2px solid var(--stitch-color-bg); box-shadow: 0 0 0 1px var(--stitch-color-border);}
.stitch-timeline-date { font-size: 0.75rem; color: var(--stitch-color-text-muted); margin-bottom: 4px; font-weight: 600; text-transform: uppercase; letter-spacing: 0.5px;}
.stitch-timeline-content { font-size: 0.875rem; background: var(--stitch-color-bg-alt); padding: 16px; border-radius: var(--stitch-radius-md); color: var(--stitch-color-text); border: 1px solid var(--stitch-color-border);}

/* ==========================================================
   🔔 FEEDBACK PRO Y MICRO-INTERACCIONES
   ========================================================== */
/* Toast Notification Simulation */
.stitch-toast-container { position: fixed; bottom: 24px; right: 24px; display: flex; flex-direction: column; gap: 12px; z-index: 1000; pointer-events: none;}
.stitch-toast { background: var(--stitch-color-text); color: var(--stitch-color-bg); padding: 12px 20px; border-radius: var(--stitch-radius-md); font-size: 0.875rem; font-weight: 500; box-shadow: 0 8px 24px rgba(0,0,0,0.15); display: flex; align-items: center; gap: 12px; pointer-events: auto; animation: stitch-slide-up 0.5s cubic-bezier(0.16, 1, 0.3, 1);}
@keyframes stitch-slide-up { 0% { opacity: 0; transform: translateY(30px) scale(0.9); } 100% { opacity: 1; transform: translateY(0) scale(1); } }
.stitch-toast-icon { color: var(--stitch-color-bg-alt); font-size: 1.25rem; }

/* Empty States */
.stitch-empty-state { padding: 48px 24px; text-align: center; border: 2px dashed var(--stitch-color-border); border-radius: var(--stitch-radius-lg); display: flex; flex-direction: column; align-items: center; justify-content: center; background: var(--stitch-color-bg); margin-bottom: 24px;}
.stitch-empty-icon { font-size: 3rem; color: var(--stitch-color-border); margin-bottom: 16px; display: block;}
.stitch-empty-title { font-weight: 600; font-size: 1.25rem; margin-bottom: 8px; color: var(--stitch-color-text); }
.stitch-empty-body { color: var(--stitch-color-text-muted); font-size: 0.875rem; max-width: 300px; margin-bottom: 24px; line-height: 1.5; margin-left: auto; margin-right: auto;}

/* Step Indicator */
.stitch-steps { display: flex; align-items: center; justify-content: space-between; width: 100%; position: relative; max-width: 400px; margin: 0 auto 32px auto;}
.stitch-steps::before { content: ""; position: absolute; top: 16px; left: 16px; right: 16px; height: 2px; background: var(--stitch-color-border); z-index: 0; }
.stitch-step { width: 32px; height: 32px; border-radius: 50%; background: var(--stitch-color-bg); border: 2px solid var(--stitch-color-border); display: flex; align-items: center; justify-content: center; font-weight: 600; font-size: 0.875rem; position: relative; z-index: 1; color: var(--stitch-color-text-muted); transition: all 0.3s; }
.stitch-step.active { border-color: var(--stitch-color-primary); background: var(--stitch-color-primary); color: white; }
.stitch-step.completed { border-color: var(--stitch-color-primary); background: var(--stitch-color-bg); color: var(--stitch-color-primary); }
.stitch-step-label { position: absolute; top: 40px; font-size: 0.75rem; color: var(--stitch-color-text-muted); white-space: nowrap; font-weight: 500;}

/* ==========================================================
   📝 FORMULARIOS PRO
   ========================================================== */
/* Input con Icono */
.stitch-input-icon-wrapper { position: relative; display: flex; align-items: center; width: 100%; max-width: 400px; margin-bottom: var(--stitch-space-md);}
.stitch-input-icon-wrapper .stitch-icon { position: absolute; left: 12px; font-size: 1.25rem; pointer-events: none; opacity: 0.5;}
.stitch-input-icon-wrapper .stitch-input { padding-left: 40px; width: 100%; }

/* Multi-select Chips */
.stitch-chips-input { display: flex; flex-wrap: wrap; gap: 8px; padding: 8px; border: 1px solid var(--stitch-color-border); border-radius: var(--stitch-radius-sm); background: var(--stitch-color-bg); min-height: 48px; width: 100%; max-width: 400px; margin-bottom: var(--stitch-space-md);}
.stitch-chip { display: inline-flex; align-items: center; gap: 6px; background: var(--stitch-color-bg-alt); padding: 4px 12px; border-radius: 16px; font-size: 0.8125rem; font-weight: 500; color: var(--stitch-color-text); border: 1px solid var(--stitch-color-border); }
.stitch-chip-close { cursor: pointer; color: var(--stitch-color-text-muted); font-weight: bold; font-size: 1rem; line-height: 1; margin-left: 2px;}
.stitch-chip-close:hover { color: var(--stitch-color-danger); }
.stitch-chips-input input { border: none; outline: none; flex: 1; min-width: 80px; background: transparent; font-size: 0.875rem; color: var(--stitch-color-text); padding: 4px; }

/* File Dropzone */
.stitch-dropzone { border: 2px dashed var(--stitch-color-border); border-radius: var(--stitch-radius-md); padding: 40px 24px; text-align: center; background: var(--stitch-color-bg); cursor: pointer; transition: all 0.2s; width: 100%; max-width: 500px; display: flex; flex-direction: column; align-items: center; margin-bottom: var(--stitch-space-md);}
.stitch-dropzone:hover { border-color: var(--stitch-color-primary); background: #f8faff; }
.stitch-dropzone-icon { font-size: 3rem; margin-bottom: 12px; color: var(--stitch-color-primary); opacity: 0.8; }
.stitch-dropzone-title { font-size: 1rem; font-weight: 600; color: var(--stitch-color-text); margin-bottom: 4px; }
.stitch-dropzone-desc { font-size: 0.875rem; color: var(--stitch-color-text-muted); }

Eres un Desarrollador Front-end experto especializado en Google Stitch (Esquema Corporate Elegance). 
=========================================
OBJETIVO: Diseñar la pantalla de [RELLENA QUÉ QUIERES CONSTRUIR AQUÍ].
=========================================
REGLAS ESTRICTAS DE CSS:
- NO utilices estilos en línea (`style="..."`).
- NO inventes clases nuevas, confía en el Global CSS Zafiro instalado en la plataforma.
- Debes usar ÚNICAMENTE combinaciones de las siguientes clases:
  - `.stitch-container` para elevar la tarjeta mediante `box-shadow` al hacer hover.
  - Textos corporativos: `.stitch-h1`, `.stitch-h2`, `.stitch-body`, `.stitch-muted`.
  - Controles pesados: `.stitch-btn-primary`, `.stitch-btn-secondary`, `.stitch-btn-outline`.
  - Envoltorios de Formulario: agrupa `.stitch-label` y `.stitch-input` / `.stitch-select` dentro de un div con `.stitch-form-group`.

Entrega SOLAMENTE el HTML resultante ordenado de forma semántica y limpia.