/* ============================================================
 * FutureLearn — Why choose
 * Version: v1.1.1
 * ============================================================ */

.why-choose {
    /* Lấy mẫu trực tiếp từ ảnh nền website tham chiếu. */
    --why-blue-top: #0398FE;
    --why-blue-mid: #0588E3;
    --why-blue-bottom: #0578C9;
    position: relative;
    isolation: isolate;
    overflow: hidden;
    padding-block: var(--section-space-y);
    border-radius: 2rem 2rem 0 0;
    color: var(--white);
    background:
        radial-gradient(circle at 50% -8%, rgba(127, 250, 255, 0.16), transparent 28rem),
        linear-gradient(
            180deg,
            var(--why-blue-top) 0%,
            var(--why-blue-mid) 52%,
            var(--why-blue-bottom) 100%
        );
}

.why-choose::before {
    content: "";
    position: absolute;
    inset: 0;
    z-index: -2;
    opacity: 0.16;
    background-image: radial-gradient(rgba(255, 255, 255, 0.75) 1px, transparent 1px);
    background-size: 24px 24px;
    -webkit-mask-image: linear-gradient(120deg, black, transparent 52%);
    mask-image: linear-gradient(120deg, black, transparent 52%);
}

.why-choose__glow {
    position: absolute;
    top: 7rem;
    left: 50%;
    z-index: -1;
    width: 26rem;
    height: 26rem;
    border: 1px solid rgba(255, 255, 255, 0.12);
    border-radius: 50%;
    transform: translateX(-50%);
}

.why-choose__glow::before,
.why-choose__glow::after {
    content: "";
    position: absolute;
    border: 1px solid rgba(255, 255, 255, 0.09);
    border-radius: inherit;
}

.why-choose__glow::before {
    inset: 3rem;
}

.why-choose__glow::after {
    inset: 6rem;
}

.why-choose__inner {
    position: relative;
}

.why-choose__header {
    max-width: 48rem;
    margin-inline: auto;
    text-align: center;
}

.why-choose__title {
    margin: 0;
    font-family: var(--font-display);
    font-size: clamp(2rem, 6.5vw, 3.5rem);
    font-weight: 700;
    line-height: 1.15;
    text-shadow: 0 1px 2px rgba(0, 69, 135, 0.24);
    text-wrap: balance;
}

.why-choose__intro {
    max-width: 42rem;
    margin: 1rem auto 0;
    font-size: 1rem;
    line-height: 1.65;
    color: var(--white);
    text-shadow: 0 1px 2px rgba(0, 69, 135, 0.24);
    text-wrap: balance;
}

.why-choose__scroll-hint {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 0.55rem;
    margin: 1.5rem 0 0.75rem;
    font-size: 0.875rem;
    color: var(--white);
}

.why-choose__grid {
    display: flex;
    gap: 1.25rem;
    margin: 0;
    padding: 0 0 1.5rem;
    overflow-x: auto;
    overscroll-behavior-inline: contain;
    scroll-snap-type: inline mandatory;
    scrollbar-color: var(--secondary-cyan) rgba(255, 255, 255, 0.12);
    scrollbar-width: thin;
    list-style: none;
}

.why-choose__item {
    flex: 0 0 min(82vw, 21rem);
    scroll-snap-align: start;
}

.why-choose__visual {
    position: relative;
    display: grid;
    min-height: 11rem;
    place-items: center;
    overflow: hidden;
    border: 1px solid rgba(255, 255, 255, 0.28);
    border-radius: var(--radius-card);
    background: linear-gradient(145deg, rgba(255, 255, 255, 0.19), rgba(255, 255, 255, 0.06));
}

.why-choose__visual::before {
    content: "";
    position: absolute;
    width: 11rem;
    height: 11rem;
    border: 1px solid rgba(255, 255, 255, 0.18);
    border-radius: 50%;
}

.why-choose__visual::after {
    content: "";
    position: absolute;
    right: -2.5rem;
    bottom: -3rem;
    width: 8rem;
    height: 8rem;
    border-radius: 50%;
    background-color: var(--visual-accent, rgba(113, 206, 255, 0.3));
    filter: blur(1px);
}

.why-choose__visual--program {
    --visual-accent: rgba(113, 206, 255, 0.34);
}

.why-choose__visual--method {
    --visual-accent: rgba(255, 138, 0, 0.38);
}

.why-choose__visual--teachers {
    --visual-accent: rgba(255, 255, 255, 0.2);
}

.why-choose__visual--ai {
    --visual-accent: rgba(0, 166, 255, 0.42);
}

.why-choose__visual--family {
    --visual-accent: rgba(255, 153, 0, 0.34);
}

.why-choose__visual--languages {
    --visual-accent: rgba(113, 206, 255, 0.38);
}

.why-choose__visual-icon,
.why-choose__language-orbit {
    position: relative;
    z-index: 2;
    display: grid;
    width: 5.25rem;
    height: 5.25rem;
    place-items: center;
    border-radius: 1.65rem;
    font-size: 2rem;
    color: var(--primary-blue-1);
    background-color: rgba(255, 255, 255, 0.95);
    transform: rotate(-4deg);
}

.why-choose__visual-note {
    position: absolute;
    right: 0.85rem;
    bottom: 0.75rem;
    z-index: 2;
    padding: 0.35rem 0.7rem;
    border: 1px solid rgba(255, 255, 255, 0.35);
    border-radius: 999px;
    font-family: var(--font-display);
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--white);
    background-color: rgba(0, 64, 142, 0.68);
    -webkit-backdrop-filter: blur(6px);
    backdrop-filter: blur(6px);
}

.why-choose__visual-dot {
    position: absolute;
    z-index: 1;
    width: 0.7rem;
    height: 0.7rem;
    border-radius: 50%;
    background-color: var(--accent-orange);
}

.why-choose__visual-dot--one {
    top: 2rem;
    left: 2.5rem;
}

.why-choose__visual-dot--two {
    top: 3.3rem;
    right: 3rem;
    width: 0.4rem;
    height: 0.4rem;
    background-color: var(--secondary-cyan);
}

.why-choose__method-mark {
    position: relative;
    z-index: 2;
    display: flex;
    align-items: center;
    gap: 0.65rem;
    font-family: var(--font-display);
    color: var(--white);
}

.why-choose__method-mark strong {
    display: grid;
    width: 4rem;
    height: 4rem;
    place-items: center;
    border-radius: 50%;
    font-size: 1.45rem;
    background-color: rgba(255, 255, 255, 0.17);
}

.why-choose__method-mark span {
    font-size: 1.35rem;
    color: var(--accent-orange);
}

.why-choose__speech-mark,
.why-choose__progress-ring {
    position: absolute;
    top: 1.2rem;
    right: 2.2rem;
    z-index: 3;
    display: grid;
    width: 2.5rem;
    height: 2.5rem;
    place-items: center;
    border-radius: 50%;
    color: var(--accent-orange);
    background-color: var(--white);
}

.why-choose__sound-wave {
    position: absolute;
    left: calc(50% + 2.5rem);
    z-index: 2;
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.why-choose__sound-wave i {
    display: block;
    width: 0.22rem;
    height: 1.2rem;
    border-radius: 999px;
    background-color: var(--secondary-cyan);
}

.why-choose__sound-wave i:nth-child(2),
.why-choose__sound-wave i:nth-child(4) {
    height: 2rem;
}

.why-choose__sound-wave i:nth-child(3) {
    height: 2.8rem;
    background-color: var(--white);
}

.why-choose__language-orbit {
    border-radius: 50%;
    transform: none;
}

.why-choose__language {
    position: absolute;
    z-index: 3;
    display: grid;
    width: 2rem;
    height: 2rem;
    place-items: center;
    border-radius: 50%;
    font-family: var(--font-display);
    font-size: 0.7rem;
    font-weight: 700;
    color: var(--primary-blue-1);
    background-color: var(--white);
}

.why-choose__language--en {
    top: 1rem;
    left: 2rem;
}

.why-choose__language--zh {
    top: 1.2rem;
    right: 2.2rem;
}

.why-choose__language--ja {
    bottom: 1.15rem;
    left: 2.5rem;
}

.why-choose__language--ko {
    right: 2rem;
    bottom: 1rem;
}

.why-choose__content {
    padding: 1.35rem 0.35rem 0;
}

.why-choose__item-title {
    margin: 0;
    font-family: var(--font-display);
    font-size: 1.3rem;
    font-weight: 700;
    line-height: 1.35;
    color: var(--white);
    text-shadow: 0 1px 2px rgba(0, 69, 135, 0.24);
    text-wrap: balance;
}

.why-choose__description {
    margin: 0.7rem 0 0;
    font-size: 0.98rem;
    line-height: 1.65;
    color: var(--white);
    text-shadow: 0 1px 2px rgba(0, 69, 135, 0.24);
}

@media (min-width: 768px) {
    .why-choose {
        border-radius: 3rem 3rem 0 0;
    }

    .why-choose__header {
        max-width: none;
    }

    .why-choose__intro {
        max-width: none;
        font-size: clamp(0.92rem, 1.7vw, 1rem);
        white-space: nowrap;
    }

    .why-choose__scroll-hint {
        display: none;
    }

    .why-choose__grid {
        display: grid;
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: 3.25rem 2rem;
        margin-top: var(--section-content-gap);
        padding-bottom: 0;
        overflow: visible;
    }

    .why-choose__item {
        min-width: 0;
    }

    .why-choose__visual {
        min-height: 12rem;
    }
}

@media (min-width: 1200px) {
    .why-choose__grid {
        grid-template-columns: repeat(3, minmax(0, 1fr));
        gap: 3.75rem 2.25rem;
    }

    .why-choose__visual {
        min-height: 13rem;
    }

    .why-choose__item-title {
        font-size: 1.4rem;
    }
}