/* ===== About base ===== */
.about h1,
.about h2,
.about h3 {
    color: var(--green-900);
    margin-top: 0;
}

.section {
    padding: 3.25rem 0;
}

.section-head {
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    gap: 1rem;
    margin-bottom: 1.25rem;
}

.section-desc {
    margin: .5rem 0 0;
    color: var(--muted);
    max-width: 62ch;
}

.mt-2 {
    margin-top: 2rem;
}

/* ===== Hero ===== */
.about-hero {
    padding: 5rem 0 3rem;
    text-align: center;
    background: linear-gradient(180deg, var(--green-100), #ffffff);
}

.about-hero h1 {
    font-size: clamp(2rem, 4vw, 2.75rem);
    margin-bottom: .6rem;
    letter-spacing: -0.2px;
}

.about-hero p {
    max-width: 760px;
    margin: 0 auto;
    font-size: 1.08rem;
    color: var(--muted);
}

/* ===== Grid utilities ===== */
.grid-2 {
    display: grid;
    grid-template-columns: 1.1fr .9fr;
    gap: 2rem;
    align-items: center;
}

.grid-3 {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1rem;
}

/* ===== Banner (mission) ===== */
.banner {
    position: relative;
    overflow: hidden;
    background: linear-gradient(180deg, var(--mint-100), #ffffff);
    border-top: 1px solid rgba(0, 0, 0, .05);
    border-bottom: 1px solid rgba(0, 0, 0, .05);
}

.banner::after {
    content: "";
    position: absolute;
    inset: 0;
    background-image: url(../../assets/home/about-banner.png);
    background-repeat: no-repeat;
    background-size: cover;
    background-position: right center;
    opacity: .14;
    /* nhẹ hơn để đọc text tốt */
    pointer-events: none;
}

.banner .container {
    position: relative;
    z-index: 1;
}

.banner-content p {
    color: var(--muted);
}

.checklist {
    margin: 1rem 0 0;
    padding-left: 1.25rem;
    color: var(--green-700);
}

.checklist li {
    margin: .4rem 0;
}

.banner-actions {
    display: flex;
    gap: .75rem;
    flex-wrap: wrap;
    margin-top: 1.25rem;
}

/* ===== Video card (responsive) ===== */
.banner-media {
    background:
        radial-gradient(60% 60% at 20% 20%, rgba(47, 177, 116, .16), transparent 60%),
        radial-gradient(45% 45% at 80% 70%, rgba(0, 104, 55, .12), transparent 60%),
        linear-gradient(180deg, #ffffff, var(--mint-100));
    border: 1px solid rgba(0, 0, 0, .06);
    padding: 12px;
    border-radius: var(--radius);
    border: 1px solid rgba(0, 0, 0, .06);
    box-shadow: var(--shadow);
}

.banner-media .video {
    position: relative;
    width: 100%;
    padding-top: 56.25%;
    border-radius: calc(var(--radius) - 6px);
    overflow: hidden;
    background: #000;
}

.banner-media .responsive-iframe {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    border: 0;
}

/* ===== Highlight cards ===== */
.highlight-box {
    background: #fff;
    padding: 1.25rem;
    border-radius: var(--radius);
    border: 1px solid rgba(0, 0, 0, .06);
    box-shadow: var(--shadow);
}

.highlight-box h3 {
    color: var(--green-700);
    margin-bottom: .4rem;
}

.highlight-box p {
    margin: 0;
    color: var(--muted);
}

/* ===== Timeline ===== */
.timeline {
    list-style: none;
    margin: 0;
    padding: 0 0 0 1.1rem;
    border-left: 3px solid var(--green-400);
    display: grid;
    gap: 1rem;
}

.timeline-item {
    position: relative;
    padding: .95rem 1rem;
    background: #fff;
    border: 1px solid rgba(0, 0, 0, .06);
    border-radius: var(--radius);
    box-shadow: 0 10px 30px rgba(31, 77, 58, .06);
}

.timeline-item::before {
    content: "";
    position: absolute;
    left: -1.45rem;
    top: 1.15rem;
    width: 12px;
    height: 12px;
    border-radius: 999px;
    background: var(--green-500);
    box-shadow: 0 0 0 4px rgba(47, 177, 116, .18);
}

.timeline-item h3 {
    margin: 0 0 .35rem;
    color: var(--green-600);
}

.timeline-item p {
    margin: 0;
    color: var(--muted);
}

/* ===== Values ===== */
.values {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1rem;
}

.value-box {
    background: #fff;
    border: 1px solid rgba(0, 0, 0, .06);
    padding: 1.25rem;
    border-radius: var(--radius);
    text-align: center;
    box-shadow: 0 10px 30px rgba(31, 77, 58, .06);
}

.value-box h3 {
    margin-bottom: .35rem;
    color: var(--green-700);
}

.value-box p {
    margin: 0;
    color: var(--muted);
}

/* ===== Testimonials ===== */
.testimonials {
    background: linear-gradient(180deg, #ffffff, var(--green-100));
}

.testimonial {
    background: #fff;
    padding: 1.1rem;
    border-radius: var(--radius);
    border: 1px solid rgba(0, 0, 0, .06);
    box-shadow: 0 10px 30px rgba(31, 77, 58, .06);
}

.testimonial p {
    margin: 0 0 .75rem;
    color: var(--muted);
}

/* ===== Responsive ===== */
@media (max-width: 1024px) {
    .grid-3 {
        grid-template-columns: repeat(2, 1fr);
    }

    .values {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 900px) {
    .section-head {
        flex-direction: column;
        align-items: flex-start;
    }

    .grid-2 {
        grid-template-columns: 1fr;
    }

    /* video vẫn giữ, không ẩn nữa (đẹp + tăng trust) */
    .banner-media {
        padding: 10px;
    }
}

@media (max-width: 600px) {
    .about-hero {
        padding: 4.25rem 0 2.5rem;
    }

    .grid-3 {
        grid-template-columns: 1fr;
    }

    .values {
        grid-template-columns: 1fr;
    }

    .timeline {
        padding-left: 1rem;
    }

    .timeline-item::before {
        left: -1.35rem;
    }

    .banner-actions .btn {
        width: 100%;
        justify-content: center;
    }
}