/**
 * Sistema de Diseño Visual "Blanco Zen" - Soporte CRJ RMA
 * Diseñado bajo estándares de diseño gráfico editorial y UX Senior
 * Cero dependencias externas - 100% Vanilla CSS
 */

:root {
    /* Paleta Cromática Blanco Zen */
    --bg-canvas: #f8fafc;
    --bg-surface: #ffffff;
    --bg-subtle: #f1f5f9;
    --bg-hover: #e2e8f0;
    
    /* Tipografía y Contraste */
    --text-primary: #0f172a;    /* Gris pizarra oscuro para títulos y textos clave */
    --text-secondary: #334155;  /* Texto de lectura de alto contraste */
    --text-muted: #64748b;      /* Metadatos y etiquetas secundarias */
    --text-inverse: #ffffff;
    
    /* Bordes y Líneas */
    --border-subtle: #e2e8f0;
    --border-card: #cbd5e1;
    --border-focus: #2563eb;
    
    /* Acentos Funcionales de Taller */
    --accent-primary: #1d4ed8;  /* Azul cobalto técnico */
    --accent-primary-hover: #1e40af;
    --accent-success: #059669;  /* Verde esmeralda (WhatsApp, listos, pagados) */
    --accent-success-hover: #047857;
    --accent-warning: #d97706;  /* Ámbar (en revisión, presupuestos) */
    --accent-danger: #dc2626;   /* Rojo carmín (cancelaciones, errores) */
    --accent-info: #0284c7;     /* Cyan técnico */

    /* Sombras Difusas Zen */
    --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.04);
    --shadow-md: 0 4px 6px -1px rgba(15, 23, 42, 0.05), 0 2px 4px -2px rgba(15, 23, 42, 0.03);
    --shadow-lg: 0 10px 15px -3px rgba(15, 23, 42, 0.04), 0 4px 6px -4px rgba(15, 23, 42, 0.02);
    --shadow-card: 0 1px 3px rgba(15, 23, 42, 0.03), 0 10px 24px -4px rgba(15, 23, 42, 0.04);

    /* Radios y Espaciados Senior */
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 14px;
    --radius-full: 9999px;
    
    /* Tipografía Nativa */
    --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

/* Reset y Base */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: var(--font-sans);
    background-color: var(--bg-canvas);
    color: var(--text-secondary);
    line-height: 1.55;
    font-size: 15px;
    -webkit-font-smoothing: antialiased;
}

/* Contenedor Principal */
.rma-container {
    width: 100%;
    max-width: 1140px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Barra Superior / Header */
.rma-header {
    background-color: var(--bg-surface);
    border-bottom: 1px solid var(--border-subtle);
    position: sticky;
    top: 0;
    z-index: 50;
    box-shadow: var(--shadow-sm);
}

.rma-header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 70px;
}

.rma-logo-wrap {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
    color: var(--text-primary);
}

.rma-logo-icon {
    width: 38px;
    height: 38px;
    background: #eff6ff;
    color: var(--accent-primary);
    border: 1px solid #bfdbfe;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
}

.rma-logo-text {
    display: flex;
    flex-direction: column;
}

.rma-logo-title {
    font-size: 18px;
    font-weight: 700;
    letter-spacing: -0.02em;
    color: var(--text-primary);
}

.rma-logo-badge {
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--accent-primary);
}

.rma-header-nav {
    display: flex;
    align-items: center;
    gap: 16px;
}

.rma-nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    padding: 8px 12px;
    border-radius: var(--radius-sm);
    transition: background 0.15s ease, color 0.15s ease;
}

.rma-nav-link:hover {
    background-color: var(--bg-subtle);
    color: var(--text-primary);
}

.rma-rate-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 13px;
    font-weight: 600;
    background-color: #ecfdf5;
    color: #065f46;
    border: 1px solid #a7f3d0;
    padding: 6px 12px;
    border-radius: var(--radius-full);
}

/* Botones Diseñados por Humanos */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    font-family: inherit;
    font-size: 15px;
    font-weight: 600;
    min-height: 46px;
    padding: 10px 22px;
    border-radius: var(--radius-md);
    border: 1px solid transparent;
    cursor: pointer;
    text-decoration: none;
    transition: all 0.15s ease;
    user-select: none;
}

.btn-primary {
    background-color: var(--accent-primary);
    color: var(--text-inverse);
    border-color: var(--accent-primary);
    box-shadow: 0 2px 4px rgba(29, 78, 216, 0.15);
}

.btn-primary:hover {
    background-color: var(--accent-primary-hover);
    border-color: var(--accent-primary-hover);
    transform: translateY(-1px);
}

.btn-success {
    background-color: var(--accent-success);
    color: var(--text-inverse);
    border-color: var(--accent-success);
}

.btn-success:hover {
    background-color: var(--accent-success-hover);
    transform: translateY(-1px);
}

.btn-secondary {
    background-color: var(--bg-surface);
    color: var(--text-secondary);
    border-color: var(--border-card);
}

.btn-secondary:hover {
    background-color: var(--bg-subtle);
    color: var(--text-primary);
}

.btn-danger {
    background-color: #fef2f2;
    color: var(--accent-danger);
    border-color: #fecaca;
}

.btn-danger:hover {
    background-color: var(--accent-danger);
    color: var(--text-inverse);
}

.btn-lg {
    min-height: 52px;
    font-size: 16px;
    padding: 14px 28px;
    border-radius: var(--radius-lg);
}

.btn-sm {
    min-height: 36px;
    font-size: 13px;
    padding: 6px 14px;
    border-radius: var(--radius-sm);
}

.btn-block {
    width: 100%;
}

/* Tarjetas y Superficies Zen */
.card {
    background-color: var(--bg-surface);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-card);
    padding: 28px;
    margin-bottom: 24px;
}

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

.card-title {
    font-size: 20px;
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: -0.01em;
}

.card-subtitle {
    font-size: 14px;
    color: var(--text-muted);
    margin-top: 4px;
}

/* Hero Section */
.rma-hero {
    padding: 48px 0 36px;
    text-align: center;
}

.rma-hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background-color: #eff6ff;
    color: var(--accent-primary);
    border: 1px solid #bfdbfe;
    font-size: 13px;
    font-weight: 600;
    padding: 4px 14px;
    border-radius: var(--radius-full);
    margin-bottom: 18px;
}

.rma-hero-title {
    font-size: 34px;
    font-weight: 800;
    color: var(--text-primary);
    line-height: 1.25;
    letter-spacing: -0.03em;
    max-width: 820px;
    margin: 0 auto 16px;
}

.rma-hero-desc {
    font-size: 17px;
    color: var(--text-muted);
    max-width: 680px;
    margin: 0 auto 32px;
    line-height: 1.6;
}

/* Caja de Rastreo Rápido */
.rma-tracking-box {
    background: var(--bg-surface);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    padding: 24px 28px;
    max-width: 640px;
    margin: 0 auto 48px;
}

.rma-tracking-form {
    display: grid;
    grid-template-columns: 1fr 140px auto;
    gap: 12px;
    align-items: center;
}

/* Formularios e Inputs de Alto Calibre */
.form-group {
    margin-bottom: 20px;
}

.form-label {
    display: block;
    font-size: 14px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 7px;
}

.form-label .required {
    color: var(--accent-danger);
    margin-left: 3px;
}

.form-control {
    width: 100%;
    min-height: 48px;
    padding: 10px 14px;
    font-size: 15px;
    font-family: inherit;
    color: var(--text-primary);
    background-color: var(--bg-surface);
    border: 1px solid var(--border-card);
    border-radius: var(--radius-md);
    transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.form-control:focus {
    outline: none;
    border-color: var(--border-focus);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.12);
}

.form-control::placeholder {
    color: #94a3b8;
}

textarea.form-control {
    min-height: 100px;
    resize: vertical;
}

.form-hint {
    font-size: 13px;
    color: var(--text-muted);
    margin-top: 5px;
}

/* Selector Visual de Equipos (Chips de selección táctil) */
.device-selector-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    gap: 12px;
    margin-bottom: 20px;
}

.device-card-option {
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    padding: 18px 14px;
    background: var(--bg-surface);
    border: 2px solid var(--border-subtle);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all 0.15s ease;
}

.device-card-option:hover {
    border-color: #93c5fd;
    background: #f8fafc;
    transform: translateY(-2px);
}

.device-card-option input[type="radio"] {
    position: absolute;
    opacity: 0;
    pointer-events: none;
}

.device-card-option.is-selected {
    border-color: var(--accent-primary);
    background-color: #eff6ff;
    box-shadow: 0 0 0 1px var(--accent-primary);
}

.device-card-icon {
    font-size: 32px;
    margin-bottom: 8px;
}

.device-card-title {
    font-size: 14px;
    font-weight: 700;
    color: var(--text-primary);
}

.device-card-sub {
    font-size: 12px;
    color: var(--text-muted);
    margin-top: 4px;
    line-height: 1.3;
}

/* Uploader de Fotos (15 Fotos Max) */
.uploader-dropzone {
    border: 2px dashed #cbd5e1;
    border-radius: var(--radius-lg);
    background-color: #fafaf9;
    padding: 36px 20px;
    text-align: center;
    cursor: pointer;
    transition: all 0.2s ease;
    margin-bottom: 18px;
}

.uploader-dropzone:hover, .uploader-dropzone.dragover {
    border-color: var(--accent-primary);
    background-color: #eff6ff;
}

.uploader-icon {
    font-size: 40px;
    color: var(--accent-primary);
    margin-bottom: 12px;
}

.uploader-title {
    font-size: 16px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 6px;
}

.uploader-sub {
    font-size: 13px;
    color: var(--text-muted);
}

.uploader-counter {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 14px;
    font-weight: 700;
    background: #f1f5f9;
    color: var(--text-primary);
    padding: 4px 12px;
    border-radius: var(--radius-full);
    margin-bottom: 16px;
}

.uploader-previews-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(110px, 1fr));
    gap: 12px;
    margin-top: 14px;
}

.uploader-thumb-card {
    position: relative;
    width: 100%;
    aspect-ratio: 1;
    border-radius: var(--radius-md);
    overflow: hidden;
    border: 1px solid var(--border-subtle);
    background: #e2e8f0;
}

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

.uploader-thumb-del {
    position: absolute;
    top: 4px;
    right: 4px;
    width: 26px;
    height: 26px;
    background: rgba(220, 38, 38, 0.9);
    color: #fff;
    border: none;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    transition: background 0.15s ease;
}

.uploader-thumb-del:hover {
    background: #b91c1c;
}

/* Badges de Estado del Diagrama */
.badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 5px 12px;
    font-size: 12px;
    font-weight: 600;
    border-radius: var(--radius-full);
    text-transform: uppercase;
    letter-spacing: 0.03em;
}

.badge-blue { background: #dbeafe; color: #1e40af; border: 1px solid #bfdbfe; }
.badge-amber { background: #fef3c7; color: #92400e; border: 1px solid #fde68a; }
.badge-purple { background: #f3e8ff; color: #6b21a8; border: 1px solid #e9d5ff; }
.badge-indigo { background: #e0e7ff; color: #3730a3; border: 1px solid #c7d2fe; }
.badge-orange { background: #ffedd5; color: #9a3412; border: 1px solid #fed7aa; }
.badge-cyan { background: #cffafe; color: #155e75; border: 1px solid #a5f3fc; }
.badge-green, .badge-emerald { background: #d1fae5; color: #065f46; border: 1px solid #a7f3d0; }
.badge-red { background: #fee2e2; color: #991b1b; border: 1px solid #fecaca; }
.badge-gray { background: #f1f5f9; color: #475569; border: 1px solid #cbd5e1; }

/* Barra de Progreso del Caso */
.stepper-progress {
    display: flex;
    justify-content: space-between;
    margin: 24px 0 32px;
    position: relative;
}

.stepper-progress::before {
    content: '';
    position: absolute;
    top: 18px;
    left: 40px;
    right: 40px;
    height: 3px;
    background: #e2e8f0;
    z-index: 1;
}

.stepper-step {
    position: relative;
    z-index: 2;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    width: 90px;
}

.stepper-circle {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: #ffffff;
    border: 3px solid #cbd5e1;
    color: #64748b;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 14px;
    margin-bottom: 8px;
    transition: all 0.2s ease;
}

.stepper-step.is-done .stepper-circle {
    background: #059669;
    border-color: #059669;
    color: #ffffff;
}

.stepper-step.is-active .stepper-circle {
    background: #2563eb;
    border-color: #2563eb;
    color: #ffffff;
    box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.2);
}

.stepper-label {
    font-size: 12px;
    font-weight: 600;
    color: var(--text-muted);
}

.stepper-step.is-active .stepper-label,
.stepper-step.is-done .stepper-label {
    color: var(--text-primary);
    font-weight: 700;
}

/* Alertas Zen */
.alert {
    padding: 16px 20px;
    border-radius: var(--radius-md);
    margin-bottom: 20px;
    font-size: 14px;
    line-height: 1.5;
    border: 1px solid transparent;
}

.alert-success { background: #f0fdf4; border-color: #bbf7d0; color: #166534; }
.alert-warning { background: #fffbeb; border-color: #fde68a; color: #92400e; }
.alert-danger  { background: #fef2f2; border-color: #fecaca; color: #991b1b; }
.alert-info    { background: #f0f9ff; border-color: #bae6fd; color: #075985; }

/* Footer */
.rma-footer {
    background-color: var(--bg-surface);
    border-top: 1px solid var(--border-subtle);
    padding: 40px 0 30px;
    margin-top: 60px;
    text-align: center;
    font-size: 14px;
    color: var(--text-muted);
}

.rma-footer-links {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin-bottom: 16px;
}

.rma-footer-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
}

.rma-footer-links a:hover {
    color: var(--accent-primary);
}

/* Responsive */
@media (max-width: 768px) {
    .rma-hero-title { font-size: 26px; }
    .rma-hero-desc { font-size: 15px; }
    .rma-tracking-form { grid-template-columns: 1fr; }
    .stepper-progress { overflow-x: auto; padding-bottom: 10px; }
    .stepper-progress::before { display: none; }
    .stepper-step { min-width: 75px; }
    .card { padding: 20px; }
    .device-selector-grid { grid-template-columns: 1fr 1fr; }
}