/* ==========================================================================
   Nexus UI — Thành phần dùng chung cho trang công khai (bảng giá / tài liệu)
   Khu vực khách hàng & quản trị dùng chung app.css (sidebar + topbar).
   ========================================================================== */

/* -------------------------------- THẺ GIÁ -------------------------------- */
.u-plans {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 18px;
}

.u-price-card {
    position: relative;
    padding: 26px 24px;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border);
    background: var(--surface);
    display: flex;
    flex-direction: column;
    gap: 14px;
    box-shadow: var(--shadow);
    transition: transform var(--ease), border-color var(--ease), box-shadow var(--ease);
}

.u-price-card:hover {
    transform: translateY(-4px);
    border-color: var(--border-strong);
}

.u-price-card.featured {
    border-color: rgba(124, 108, 255, 0.55);
    background: linear-gradient(180deg, var(--primary-soft), transparent 55%), var(--surface);
    box-shadow: var(--shadow-glow);
    transform: translateY(-6px);
}

.u-price-tag {
    position: absolute;
    top: 18px;
    right: 18px;
}

.u-price-name {
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--text-mute);
}

.u-price {
    font-size: 34px;
    font-weight: 800;
    letter-spacing: -0.04em;
    line-height: 1;
}

.u-price small {
    font-size: 13px;
    font-weight: 500;
    color: var(--text-mute);
    letter-spacing: 0;
}

.u-price-meta {
    font-size: 12.6px;
    color: var(--text-dim);
    min-height: 18px;
}

.u-feats {
    display: grid;
    gap: 9px;
    font-size: 13px;
    color: var(--text-dim);
}

.u-feats li {
    display: flex;
    align-items: flex-start;
    gap: 8px;
}

.u-feats .ico {
    width: 16px;
    height: 16px;
    margin-top: 2px;
    color: var(--success);
    flex: none;
}

.u-price-card .btn {
    margin-top: auto;
}

/* -------------------------------- ACCORDION ------------------------------- */
.u-acc {
    display: grid;
    gap: 10px;
    max-width: 820px;
    margin: 0 auto;
}

.u-acc details,
.u-acc-item {
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    background: var(--surface);
    overflow: hidden;
    transition: border-color var(--ease), background var(--ease);
}

.u-acc details[open],
.u-acc-item[open] {
    border-color: rgba(124, 108, 255, 0.45);
    background: var(--surface-2);
}

.u-acc summary,
.u-acc-item summary {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 14px;
    padding: 16px 18px;
    font-size: 13.8px;
    font-weight: 600;
    cursor: pointer;
    list-style: none;
}

.u-acc summary::-webkit-details-marker,
.u-acc-item summary::-webkit-details-marker {
    display: none;
}

.u-acc summary::after,
.u-acc-item summary::after {
    content: "+";
    font-size: 19px;
    line-height: 1;
    color: var(--text-mute);
    transition: transform var(--ease), color var(--ease);
}

.u-acc details[open] summary::after,
.u-acc-item[open] summary::after {
    transform: rotate(45deg);
    color: var(--primary);
}

.u-acc p,
.u-acc-item p {
    padding: 0 18px 16px;
    font-size: 13.2px;
    color: var(--text-dim);
    line-height: 1.65;
}

/* ------------------------------- RESPONSIVE ----------------------------- */
@media (max-width: 900px) {
    .u-plans {
        grid-template-columns: minmax(0, 1fr);
    }

    .u-price-card.featured {
        transform: none;
    }
}

@media (max-width: 480px) {
    .u-price-card {
        padding: 22px 18px;
    }

    .u-price {
        font-size: 30px;
    }

    .u-acc summary,
    .u-acc-item summary {
        padding: 14px 15px;
        font-size: 13.4px;
    }

    .u-acc p,
    .u-acc-item p {
        padding: 0 15px 14px;
    }
}