body {
    font-family: system-ui, Arial;
    margin: 0;
    background: #f3f4f6;
}

.card {
    background: #fff;
    border-radius: 14px;
    padding: 14px;
    margin: 12px;
    box-shadow: 0 1px 4px rgba(0, 0, 0, .06);
}

input,
select,
textarea {
    width: 100%;
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: 10px;
    margin: 4px 0;
    font-size: 15px;
    box-sizing: border-box;
}

.btn {
    background: #111827;
    color: #fff;
    border: 0;
    padding: 10px 14px;
    border-radius: 10px;
    width: 100%;
    cursor: pointer;
}

.btn2 {
    background: #e5e7eb;
    padding: 9px 12px;
    border: 0;
    border-radius: 10px;
    width: 100%;
    margin-top: 6px;
    cursor: pointer;
}

.btnGreen {
    background: #16a34a;
    color: #fff;
    border: 0;
    padding: 10px 14px;
    border-radius: 10px;
    width: 100%;
    cursor: pointer;
}

.row {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.row>* {
    flex: 1;
}

.hidden {
    display: none !important;
}

.flex {
    display: flex;
    justify-content: space-between;
    gap: 8px;
    align-items: center;
}

.badge {
    padding: 4px 8px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 700;
}

.verde {
    background: #dcfce7;
    color: #166534;
}

.amarillo {
    background: #fef9c3;
    color: #854d0e;
}

.rojo {
    background: #fee2e2;
    color: #991b1b;
}

.gris {
    background: #e5e7eb;
}

/* Layout App */
header {
    background: #111827;
    color: #fff;
    padding: 14px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

nav {
    display: flex;
    gap: 6px;
    padding: 10px;
    background: #fff;
    flex-wrap: wrap;
    border-bottom: 1px solid #ddd;
}

nav a {
    padding: 9px 12px;
    border: 1px solid #ddd;
    background: #fff;
    border-radius: 20px;
    text-decoration: none;
    color: #333;
    font-size: 14px;
}

nav a.active,
nav a:hover {
    background: #111827;
    color: #fff;
    border-color: #111827;
}

main {
    padding: 10px;
    max-width: 1100px;
    margin: auto;
}

/* Kanban Restored */
.kanban {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 10px;
    overflow-x: auto;
}

.col {
    background: #f9fafb;
    border-radius: 12px;
    padding: 10px;
    min-height: 260px;
    min-width: 230px;
    border-top: 4px solid #ddd;
}

.col[data-col="Pendiente"] {
    border-top-color: #eab308;
}

.col[data-col="En proceso"] {
    border-top-color: #2563eb;
}

.col[data-col="Bloqueado"] {
    border-top-color: #ef4444;
}

.col[data-col="Terminado"] {
    border-top-color: #22c55e;
}

.task {
    background: #fff;
    border: 1px solid #eee;
    border-left: 5px solid #22c55e;
    border-radius: 10px;
    padding: 10px;
    margin-bottom: 8px;
    cursor: grab;
    box-shadow: 0 1px 3px rgba(0, 0, 0, .05);
}

.task.rojo {
    border-left-color: #ef4444;
}

.task.amarillo {
    border-left-color: #eab308;
}

.task.gris {
    border-left-color: #9ca3af;
}

@media(max-width:800px) {
    .kanban {
        grid-template-columns: 1fr 1fr;
    }
}