/*
|--------------------------------------------------------------------------
| Landing Layout Polish v1.0
|--------------------------------------------------------------------------
| Purpose:
| - Center landing feature icons consistently.
| - Make "How Learning Works" steps evenly aligned.
| - Normalize pricing card header, price, features, and CTA alignment.
|
| Keep this file after landing-page.css and subscription-landing-patch.css.
*/

.landing-section {
    scroll-margin-top: 90px;
}

/* Main Features */
.feature-grid {
    width: min(100%, var(--landing-max-width));
    margin: 0 auto;
    grid-template-columns: repeat(6, minmax(0, 1fr));
    align-items: stretch;
}

.feature-card {
    min-height: 232px;
    padding: 28px 20px 26px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: flex-start;
}

.feature-icon-frame {
    width: 56px;
    height: 56px;
    margin: 0 auto 18px;
    display: grid;
    place-items: center;
    flex: 0 0 auto;
}

.feature-card .feature-icon-frame img,
.feature-card img {
    width: 44px;
    height: 44px;
    margin: 0;
    display: block;
    object-fit: contain;
    object-position: center;
}

.feature-card h3 {
    min-height: 44px;
    margin: 0 0 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    line-height: 1.25;
}

.feature-card p {
    max-width: 178px;
    margin: 0 auto;
    text-align: center;
}

/* How Learning Works */
.study-steps {
    width: min(100%, 1060px);
    margin: 0 auto;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 42px;
    align-items: start;
}

.study-step {
    min-width: 0;
    padding-top: 2px;
}

.study-step:not(:last-child)::after {
    top: 48px;
    right: -43px;
    width: 56px;
}

.study-step .step-number,
.study-step > .step-number {
    left: calc(50% - 54px);
    top: 0;
}

.study-step .step-icon,
.study-step > .step-icon {
    width: 78px;
    height: 70px;
    margin: 24px auto 16px;
    display: grid;
    place-items: center;
    line-height: 1;
}

.study-step h3 {
    min-height: 22px;
    margin-bottom: 10px;
    line-height: 1.25;
}

.study-step p {
    width: min(100%, 210px);
    margin: 0 auto;
}

/* Pricing */
.pricing-section {
    padding-top: 64px;
}

.pricing-header {
    align-items: flex-end;
    margin-bottom: 28px;
}

.pricing-header > div:first-child {
    max-width: 650px;
}

.pricing-header h2 {
    max-width: 600px;
    font-size: clamp(32px, 4.1vw, 48px);
    line-height: 1.05;
}

.pricing-header p {
    max-width: 620px;
    line-height: 1.65;
}

.billing-toggle {
    min-height: 48px;
    white-space: nowrap;
}

.billing-toggle button,
.billing-toggle span {
    min-height: 38px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.pricing-grid {
    width: min(100%, 1180px);
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 20px;
    align-items: stretch;
}

.pricing-card {
    min-height: 458px;
    padding: 26px 24px 24px;
    border-radius: 24px;
}

.pricing-card.is-popular {
    transform: translateY(-6px);
}

.pricing-card.is-popular::before {
    background:
        linear-gradient(180deg, rgba(13, 91, 90, 0.98) 0, rgba(13, 91, 90, 0.94) 142px, transparent 143px),
        radial-gradient(circle at 78% 0%, rgba(214, 166, 78, 0.32), transparent 9rem);
}

.popular-badge {
    top: 0;
    right: 24px;
    min-width: 74px;
    text-align: center;
}

.plan-title-row {
    position: relative;
    min-height: 102px;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    justify-content: flex-start;
    gap: 8px;
    padding-right: 0;
}

.plan-title-row > div {
    width: 100%;
    min-height: 58px;
    display: flex;
    align-items: center;
    gap: 14px;
}

.plan-hanzi {
    width: 56px;
    height: 56px;
    margin: 0;
    border-radius: 18px;
    flex: 0 0 56px;
    font-size: 30px;
}

.plan-title-row h3 {
    min-width: 0;
    margin: 0;
    line-height: 1.12;
}

.plan-pinyin {
    margin-left: 70px;
    line-height: 1;
}

.pricing-card.is-popular .plan-pinyin {
    color: rgba(255, 255, 255, 0.86);
}

.pricing-card.is-popular .popular-badge + .plan-title-row {
    padding-top: 2px;
}

.pricing-card > p {
    min-height: 58px;
    margin: 2px 0 0;
    display: flex;
    align-items: flex-start;
}

.price-line {
    min-height: 52px;
    margin: 20px 0 20px;
    align-items: baseline;
    gap: 7px;
}

.price-line strong {
    display: inline-block;
    font-size: clamp(30px, 2.35vw, 38px);
    line-height: 1;
    letter-spacing: -0.055em;
}

.price-line span {
    display: inline-block;
    padding-bottom: 3px;
    font-size: 12px;
    line-height: 1.2;
}

.pricing-card ul {
    min-height: 116px;
    margin-bottom: 26px;
    gap: 11px;
}

.pricing-card li {
    line-height: 1.42;
}

.pricing-card > a {
    width: fit-content;
    min-width: 126px;
    max-width: 100%;
    min-height: 46px;
    padding: 0 18px;
    align-self: center;
    white-space: nowrap;
}

.pricing-note {
    max-width: 780px;
    margin: 26px auto 0;
    text-align: center;
}

/* Tablet */
@media (max-width: 1180px) {
    .feature-grid {
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }

    .feature-card {
        min-height: 210px;
    }

    .pricing-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
        max-width: 780px;
    }

    .pricing-card.is-popular {
        transform: none;
    }
}

@media (max-width: 900px) {
    .study-steps {
        grid-template-columns: repeat(2, minmax(0, 1fr));
        max-width: 640px;
        row-gap: 34px;
    }

    .study-step:not(:last-child)::after {
        display: none;
    }

    .pricing-header {
        flex-direction: column;
        align-items: flex-start;
    }

    .billing-toggle {
        width: 100%;
        overflow-x: auto;
    }
}

/* Mobile */
@media (max-width: 640px) {
    .feature-grid,
    .study-steps,
    .pricing-grid {
        grid-template-columns: 1fr;
    }

    .feature-card {
        min-height: auto;
    }

    .feature-card h3 {
        min-height: auto;
    }

    .study-step .step-number,
    .study-step > .step-number {
        left: calc(50% - 54px);
    }

    .pricing-section {
        padding-top: 42px;
    }

    .pricing-header h2 {
        font-size: clamp(28px, 11vw, 38px);
    }

    .billing-toggle {
        justify-content: flex-start;
    }

    .pricing-card {
        min-height: auto;
        padding: 22px;
    }

    .pricing-card.is-popular::before {
        background:
            linear-gradient(180deg, rgba(13, 91, 90, 0.98) 0, rgba(13, 91, 90, 0.94) 132px, transparent 133px),
            radial-gradient(circle at 78% 0%, rgba(214, 166, 78, 0.32), transparent 9rem);
    }

    .plan-title-row,
    .pricing-card > p,
    .pricing-card ul {
        min-height: auto;
    }

    .price-line {
        min-height: auto;
    }

    .pricing-card > a {
        width: 100%;
    }
}