:root {
    --pis-color-principal: #0f766e;
    --pis-color-principal-oscuro: #115e59;
    --pis-color-secundario: #f59e0b;
    --pis-color-fondo: #f8fafc;
    --pis-color-texto: #1f2937;
    --pis-color-suave: #64748b;
    --pis-color-borde: #dbe3ea;
    --pis-color-blanco: #ffffff;
    --pis-radio: 18px;
    --pis-sombra: 0 18px 45px rgba(15, 23, 42, 0.08);
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: Arial, Helvetica, sans-serif;
    background: var(--pis-color-fondo);
    color: var(--pis-color-texto);
    line-height: 1.6;
}

.pis-app {
    width: 100%;
    min-height: 100vh;
}

.pis-contenedor {
    width: min(1180px, calc(100% - 32px));
    margin: 0 auto;
}

.pis-hero {
    padding: 72px 0 52px;
    background: linear-gradient(135deg, #0f766e, #14b8a6);
    color: var(--pis-color-blanco);
}

.pis-hero h1 {
    max-width: 850px;
    margin: 16px 0;
    font-size: clamp(2rem, 5vw, 4rem);
    line-height: 1.1;
}

.pis-hero p {
    max-width: 760px;
    font-size: 1.15rem;
    margin: 0;
}

.pis-etiqueta {
    display: inline-block;
    padding: 8px 14px;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.18);
    font-weight: 700;
    font-size: 0.9rem;
}

.pis-panel {
    margin-top: -34px;
    position: relative;
    z-index: 2;
}

.pis-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 24px;
}

.pis-card {
    background: var(--pis-color-blanco);
    border: 1px solid var(--pis-color-borde);
    border-radius: var(--pis-radio);
    box-shadow: var(--pis-sombra);
    padding: 24px;
}

.pis-card-header h2 {
    margin: 0 0 6px;
    font-size: 1.35rem;
}

.pis-card-header p {
    margin: 0 0 18px;
    color: var(--pis-color-suave);
}

.pis-textarea {
    width: 100%;
    min-height: 260px;
    resize: vertical;
    border: 1px solid var(--pis-color-borde);
    border-radius: 14px;
    padding: 16px;
    font-size: 1rem;
    font-family: Arial, Helvetica, sans-serif;
    outline: none;
    background: #ffffff;
    color: var(--pis-color-texto);
}

.pis-textarea:focus {
    border-color: var(--pis-color-principal);
    box-shadow: 0 0 0 4px rgba(20, 184, 166, 0.15);
}

.pis-textarea-codigo {
    min-height: 120px;
    margin-top: 16px;
    font-family: Consolas, Monaco, monospace;
    font-size: 0.9rem;
    background: #0f172a;
    color: #e5e7eb;
}

.pis-opciones {
    display: grid;
    gap: 10px;
    margin: 18px 0;
    color: var(--pis-color-texto);
    font-size: 0.95rem;
}

.pis-opciones label {
    display: flex;
    align-items: center;
    gap: 8px;
}

.pis-acciones {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 18px;
}

.pis-btn {
    border: 0;
    border-radius: 999px;
    padding: 12px 18px;
    font-weight: 700;
    cursor: pointer;
    transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}

.pis-btn:hover {
    transform: translateY(-1px);
}

.pis-btn-principal {
    background: var(--pis-color-principal);
    color: var(--pis-color-blanco);
    box-shadow: 0 10px 24px rgba(15, 118, 110, 0.24);
}

.pis-btn-principal:hover {
    background: var(--pis-color-principal-oscuro);
}

.pis-btn-secundario {
    background: #e2e8f0;
    color: #0f172a;
}

.pis-btn-secundario:hover {
    background: #cbd5e1;
}

.pis-resultado {
    min-height: 260px;
    border: 1px dashed var(--pis-color-borde);
    border-radius: 14px;
    padding: 18px;
    background: #fdfefe;
}

.pis-resultado ul {
    margin: 0;
    padding-left: 24px;
}

.pis-resultado li {
    margin-bottom: 8px;
}

.pis-placeholder {
    margin: 0;
    color: var(--pis-color-suave);
}

.pis-ayuda {
    padding: 54px 0 36px;
}

.pis-ayuda h2 {
    font-size: 2rem;
    margin-bottom: 12px;
}

.pis-beneficios {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 18px;
    margin-top: 24px;
}

.pis-beneficios article {
    background: var(--pis-color-blanco);
    border: 1px solid var(--pis-color-borde);
    border-radius: var(--pis-radio);
    padding: 22px;
}

.pis-beneficios h3 {
    margin-top: 0;
    color: var(--pis-color-principal-oscuro);
}

.pis-footer {
    padding: 28px 0;
    background: #0f172a;
    color: #e5e7eb;
    text-align: center;
}

.pis-footer p {
    margin: 6px 0;
}

@media (max-width: 860px) {
    .pis-grid,
    .pis-beneficios {
        grid-template-columns: 1fr;
    }

    .pis-hero {
        padding-top: 52px;
    }

    .pis-card {
        padding: 18px;
    }
}