/* ==========================================================
   Trang thông tin: Giới thiệu, Ủng hộ, 404
   ========================================================== */
.page-body {
    display: grid;
    gap: 14px;
    max-width: 820px;
}

.page-body .lead {
    font-size: 1.05rem;
    color: var(--ink-2);
    line-height: 1.75;
}

.value-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 10px;
}

.value-card {
    background: var(--surface);
    border: 1px solid var(--line);
    border-radius: var(--r-lg);
    padding: 16px;
    transition: border-color var(--t), box-shadow var(--t);
}

.value-card:hover {
    border-color: var(--brand-200);
    box-shadow: var(--sh-md);
}

.value-card i {
    width: 34px;
    height: 34px;
    border-radius: var(--r-md);
    display: grid;
    place-items: center;
    color: var(--brand);
    background: var(--brand-50);
    margin-bottom: 10px;
}

.value-card h3 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 4px;
}

.value-card p {
    color: var(--ink-2);
    font-size: .93rem;
}

.value-card .note {
    margin-top: 10px;
    padding-top: 10px;
    border-top: 1px dashed var(--line);
    color: var(--muted);
    font-size: .88rem;
}

.contact-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 12px;
}

.contact-row h2 {
    font-size: 1.05rem;
    font-weight: 600;
}

.contact-row p {
    color: var(--muted);
    font-size: .93rem;
}

/* ---------- Ủng hộ ---------- */
.donate-card {
    display: grid;
    grid-template-columns: 220px 1fr;
    gap: 20px;
    align-items: center;
}

.donate-qr {
    background: var(--surface);
    border: 1px solid var(--line);
    border-radius: var(--r-lg);
    padding: 10px;
}

.donate-qr img {
    display: block;
    width: 100%;
    border-radius: var(--r-md);
}

.bank-info {
    display: grid;
    border: 1px solid var(--line);
    border-radius: var(--r-lg);
    overflow: hidden;
    background: var(--surface);
}

.info-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 12px;
    padding: 11px 14px;
}

.info-row+.info-row {
    border-top: 1px solid var(--line);
}

.info-label {
    color: var(--muted);
}

.info-value {
    font-weight: 600;
}

.stk-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-weight: 600;
    color: var(--brand);
    background: var(--brand-50);
    border: 1px solid var(--brand-100);
    padding: 4px 10px;
    border-radius: var(--r-md);
    cursor: pointer;
    transition: background var(--t), border-color var(--t), transform var(--t);
}

.stk-badge:hover {
    background: var(--brand-100);
    border-color: var(--brand-200);
}

.stk-badge:active {
    transform: scale(.96);
}

#copy-toast {
    position: fixed;
    left: 50%;
    bottom: 24px;
    transform: translate(-50%, 20px);
    background: var(--ink);
    color: #fff;
    padding: 9px 16px;
    border-radius: var(--r-md);
    font-size: .93rem;
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--t), transform var(--t), visibility var(--t);
    z-index: 3000;
}

#copy-toast.show {
    opacity: 1;
    visibility: visible;
    transform: translate(-50%, 0);
}

@media (max-width: 640px) {
    .donate-card {
        grid-template-columns: 1fr;
    }

    .donate-qr {
        max-width: 240px;
        margin: 0 auto;
    }
}

/* ---------- 404 ---------- */
.error-code {
    font-size: 4rem;
    font-weight: 700;
    line-height: 1;
    color: var(--brand);
}

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

.countdown-text {
    font-weight: 600;
    color: var(--brand);
}