.knowledge-page {
    padding: clamp(40px, 6vw, 80px) 0 clamp(80px, 10vw, 120px);
    background:
        radial-gradient(circle at top right, rgba(73, 195, 179, 0.09), transparent 28%),
        linear-gradient(180deg, #f8faf8 0%, #f7f8fb 100%);
}

.knowledge-page__container {
    display: grid;
    gap: clamp(40px, 6vw, 64px);
}

/* ─── Hero carousel ─── */

.knowledge-hero__slides {
    display: grid;
}

.knowledge-hero__slide {
    grid-area: 1 / 1;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.55s ease;
}

.knowledge-hero__slide.is-active {
    opacity: 1;
    pointer-events: auto;
}

.knowledge-hero__dots {
    display: flex;
    gap: 6px;
    margin-top: 14px;
}

.knowledge-hero__dot {
    position: relative;
    height: 3px;
    width: 28px;
    border: none;
    border-radius: 2px;
    background: rgba(15, 23, 42, 0.12);
    cursor: pointer;
    padding: 0;
    overflow: hidden;
    transition: width 0.25s ease, background 0.25s ease;
}

.knowledge-hero__dot.is-active {
    width: 56px;
    background: rgba(15, 23, 42, 0.1);
}

.knowledge-hero__dot::after {
    content: '';
    position: absolute;
    inset: 0;
    width: 0%;
    background: #0f766e;
    border-radius: inherit;
}

.knowledge-hero__dot.is-active::after {
    animation: dot-progress 10s linear forwards;
}

@keyframes dot-progress {
    from { width: 0% }
    to   { width: 100% }
}

/* ─── Hero featured card ─── */

.knowledge-hero__card {
    display: grid;
    grid-template-columns: 1fr 1.05fr;
    min-height: clamp(340px, 42vw, 500px);
    width: 100%;
    padding: 0;
    border: 1px solid rgba(15, 23, 42, 0.08);
    border-radius: 20px;
    overflow: hidden;
    background: #ffffff;
    cursor: pointer;
    text-align: left;
    font: inherit;
    color: inherit;
    box-shadow: 0 2px 12px rgba(15, 23, 42, 0.04);
    transition: box-shadow 0.25s ease, transform 0.25s ease;
}

.knowledge-hero__card:hover {
    box-shadow: 0 12px 40px rgba(15, 23, 42, 0.1);
    transform: translateY(-2px);
}

.knowledge-hero__card:focus-visible {
    outline: 2px solid rgba(73, 195, 179, 0.45);
    outline-offset: 3px;
}

.knowledge-hero__content {
    display: grid;
    align-content: center;
    gap: 22px;
    padding: clamp(28px, 4vw, 56px);
}

.knowledge-hero__badge {
    display: inline-flex;
    align-items: center;
    gap: 7px;
    padding: 6px 14px;
    border-radius: 999px;
    background: #0f766e;
    color: #ffffff;
    font-size: 0.76rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    width: fit-content;
}

.knowledge-hero__badge-dot {
    opacity: 0.6;
}

.knowledge-hero__title {
    margin: 0;
    font-size: clamp(1.85rem, 3vw, 2.9rem);
    font-weight: 600;
    line-height: 1.08;
    letter-spacing: -0.04em;
    color: #0f172a;
    max-width: 20ch;
}

.knowledge-hero__description {
    margin: 0;
    font-size: clamp(0.95rem, 1.1vw, 1.05rem);
    line-height: 1.7;
    color: #526173;
    max-width: 42ch;
}

.knowledge-hero__cta {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    width: fit-content;
    padding: 10px 20px;
    border: 1.5px solid rgba(15, 23, 42, 0.18);
    border-radius: 999px;
    font-size: 0.88rem;
    font-weight: 600;
    color: #0f172a;
    transition: border-color 0.2s ease, color 0.2s ease, background 0.2s ease;
}

.knowledge-hero__card:hover .knowledge-hero__cta {
    border-color: #0f766e;
    color: #0f766e;
    background: rgba(15, 118, 110, 0.04);
}

.knowledge-hero__media {
    position: relative;
    overflow: hidden;
}

.knowledge-hero__media img {
    width: 100%;
    height: 100%;
    display: block;
    object-fit: cover;
    transition: transform 0.55s cubic-bezier(0.16, 1, 0.3, 1);
}

.knowledge-hero__card:hover .knowledge-hero__media img {
    transform: scale(1.04);
}

.knowledge-hero__overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, rgba(15, 23, 42, 0.02) 0%, rgba(15, 23, 42, 0.3) 100%);
    pointer-events: none;
    z-index: 1;
}

.knowledge-hero__media .tutorial-card__play {
    width: 60px;
    height: 60px;
    z-index: 2;
}

.knowledge-hero__media .tutorial-card__play svg {
    width: 24px;
    height: 24px;
    margin-left: 3px;
}

.knowledge-hero__card:hover .knowledge-hero__media .tutorial-card__play {
    transform: translate(-50%, -50%) scale(1.1);
    background: #ffffff;
    box-shadow: 0 8px 32px rgba(15, 23, 42, 0.22), 0 0 0 1px rgba(255, 255, 255, 0.8) inset;
}

/* ─── Browse row ─── */

.knowledge-browse {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
    flex-wrap: wrap;
}

.knowledge-browse__left {
    display: flex;
    align-items: baseline;
    gap: 10px;
}

.knowledge-browse__left h2 {
    margin: 0;
    font-size: clamp(1rem, 1.4vw, 1.2rem);
    font-weight: 600;
    letter-spacing: -0.02em;
    color: #0f172a;
}

.knowledge-browse__count {
    font-size: 0.82rem;
    color: #94a3b8;
    font-weight: 500;
}

.knowledge-browse__search-wrap {
    display: flex;
    align-items: center;
    gap: 9px;
    padding: 9px 16px;
    border: 1.5px solid rgba(15, 23, 42, 0.1);
    border-radius: 999px;
    background: #ffffff;
    cursor: text;
    transition: border-color 0.2s ease;
}

.knowledge-browse__search-wrap:focus-within {
    border-color: #0f766e;
}

.knowledge-browse__search-wrap svg {
    color: #94a3b8;
    flex-shrink: 0;
    transition: color 0.2s ease;
}

.knowledge-browse__search-wrap:focus-within svg {
    color: #0f766e;
}

.knowledge-browse__search-input {
    border: none;
    background: transparent;
    font: inherit;
    font-size: 0.875rem;
    color: #0f172a;
    outline: none;
    width: 190px;
}

.knowledge-browse__search-input::placeholder {
    color: #b0bec5;
}

/* ─── Divider ─── */

.knowledge-divider {
    border: none;
    border-top: 1px solid rgba(15, 23, 42, 0.08);
    margin: 0;
}

/* ─── Section ─── */

.knowledge-section {
    display: grid;
    gap: 20px;
}

/* ─── Grid ─── */

.knowledge-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 28px;
    align-items: start;
}

.knowledge-grid__item {
    min-width: 0;
}

.knowledge-grid__item[hidden] {
    display: none;
}

/* ─── Card ─── */

.tutorial-card {
    width: 100%;
    display: grid;
    gap: 14px;
    padding: 0;
    border: none;
    background: transparent;
    text-align: left;
    font: inherit;
    color: inherit;
    cursor: pointer;
    border-radius: 18px;
    transition: transform 0.22s ease;
}

.tutorial-card__media {
    position: relative;
    display: block;
    min-height: 0;
    aspect-ratio: 16 / 9;
    border-radius: 16px;
    overflow: hidden;
    background: #dbe4ee;
}

.tutorial-card__media img {
    width: 100%;
    height: 100%;
    display: block;
    object-fit: cover;
    transition: transform 0.45s cubic-bezier(0.16, 1, 0.3, 1);
}

.tutorial-card__media-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, rgba(15, 23, 42, 0.02) 0%, rgba(15, 23, 42, 0.28) 100%);
    pointer-events: none;
    z-index: 1;
}

/* ─── Play button (shared) ─── */

.tutorial-card__play {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    z-index: 2;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 52px;
    height: 52px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    color: #0f172a;
    box-shadow:
        0 4px 20px rgba(15, 23, 42, 0.18),
        0 0 0 1px rgba(255, 255, 255, 0.55) inset;
    transition: transform 0.28s cubic-bezier(0.16, 1, 0.3, 1), background 0.2s ease, box-shadow 0.2s ease;
    pointer-events: none;
}

.tutorial-card__play svg {
    display: block;
    margin-left: 3px;
}

/* ─── Card body ─── */

.tutorial-card__body {
    display: grid;
    gap: 8px;
    padding: 0 2px;
}

.tutorial-card__meta {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: #0f766e;
    line-height: 1;
}

.tutorial-card__title {
    display: block;
    margin: 0;
    color: #0f172a;
    font-size: clamp(1.1rem, 1.4vw, 1.35rem);
    font-weight: 600;
    line-height: 1.22;
    letter-spacing: -0.025em;
    transition: color 0.2s ease;
}

.tutorial-card__description {
    display: block;
    margin: 0;
    color: #5b6879;
    font-size: 0.93rem;
    line-height: 1.7;
    max-width: 58ch;
}

/* ─── Card hover/focus ─── */

.tutorial-card:hover .tutorial-card__media img,
.tutorial-card:focus-visible .tutorial-card__media img {
    transform: scale(1.04);
}

.tutorial-card:hover,
.tutorial-card:focus-visible {
    transform: translateY(-3px);
}

.tutorial-card:hover .tutorial-card__play,
.tutorial-card:focus-visible .tutorial-card__play {
    transform: translate(-50%, -50%) scale(1.13);
    background: #ffffff;
    box-shadow:
        0 8px 32px rgba(15, 23, 42, 0.22),
        0 0 0 1px rgba(255, 255, 255, 0.8) inset;
}

.tutorial-card:hover .tutorial-card__title,
.tutorial-card:focus-visible .tutorial-card__title {
    color: #0f766e;
}

/* ─── Focus (shared) ─── */

.tutorial-card:focus-visible,
.knowledge-modal__close:focus-visible,
.knowledge-browse__search-wrap:focus-within .knowledge-browse__search-input {
    outline: none;
}

.knowledge-hero__card:focus-visible,
.tutorial-card:focus-visible,
.knowledge-modal__close:focus-visible {
    outline: 2px solid rgba(73, 195, 179, 0.45);
    outline-offset: 3px;
}

/* ─── Modal ─── */

.knowledge-modal-open {
    overflow: hidden;
}

.knowledge-modal {
    position: fixed;
    inset: 0;
    z-index: 1200;
    display: grid;
    place-items: center;
    padding: 24px;
}

.knowledge-modal[hidden] {
    display: none;
}

.knowledge-modal__backdrop {
    position: absolute;
    inset: 0;
    background: rgba(15, 23, 42, 0.56);
    opacity: 0;
    transition: opacity 0.2s ease;
}

.knowledge-modal__dialog {
    position: relative;
    z-index: 1;
    width: min(1040px, calc(100vw - 32px));
    display: grid;
    gap: 24px;
    padding: 24px;
    border-radius: 28px;
    background: #ffffff;
    box-shadow: 0 28px 90px rgba(15, 23, 42, 0.24);
    transform: translateY(14px) scale(0.985);
    opacity: 0;
    transition: transform 0.22s ease, opacity 0.22s ease;
}

.knowledge-modal.is-open .knowledge-modal__backdrop {
    opacity: 1;
}

.knowledge-modal.is-open .knowledge-modal__dialog {
    transform: translateY(0) scale(1);
    opacity: 1;
}

.knowledge-modal__header {
    display: flex;
    justify-content: space-between;
    gap: 20px;
    align-items: flex-start;
}

.knowledge-modal__header-copy {
    display: grid;
    gap: 8px;
}

.knowledge-modal__eyebrow {
    margin: 0;
    font-size: 0.8rem;
    font-weight: 700;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: #0f766e;
}

.knowledge-modal__header-copy h2,
.knowledge-modal__header-copy p {
    margin: 0;
}

.knowledge-modal__header-copy h2 {
    color: #0f172a;
    font-size: clamp(1.5rem, 2.4vw, 2.2rem);
    line-height: 1.1;
    letter-spacing: -0.04em;
}

.knowledge-modal__header-copy p:last-child {
    color: #64748b;
    line-height: 1.65;
    max-width: 62ch;
}

.knowledge-modal__close {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    border: 1px solid rgba(148, 163, 184, 0.22);
    border-radius: 999px;
    background: rgba(248, 250, 252, 0.96);
    color: #0f172a;
    font-size: 1.6rem;
    cursor: pointer;
    transition: background-color 0.2s ease, border-color 0.2s ease, transform 0.2s ease;
}

.knowledge-modal__close:hover {
    background: #f8fafc;
    border-color: rgba(148, 163, 184, 0.38);
    transform: translateY(-1px);
}

.knowledge-modal__frame-wrap {
    position: relative;
    overflow: hidden;
    border-radius: 24px;
    background: #020617;
    aspect-ratio: 16 / 9;
}

.knowledge-modal__frame-wrap iframe {
    width: 100%;
    height: 100%;
    border: 0;
    display: block;
}

/* ─── Responsive ─── */

@media (max-width: 900px) {
    .knowledge-hero__card {
        grid-template-columns: 1fr;
        min-height: unset;
    }

    .knowledge-hero__media {
        aspect-ratio: 16 / 9;
        order: -1;
    }

    .knowledge-hero__title {
        max-width: 100%;
    }

    .knowledge-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

@media (max-width: 640px) {
    .knowledge-page {
        padding-top: 32px;
    }

    .knowledge-hero__content {
        gap: 16px;
        padding: 24px 20px;
    }

    .knowledge-browse__search-input {
        width: 140px;
    }

    .knowledge-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .tutorial-card__media {
        border-radius: 12px;
    }

    .tutorial-card__play {
        width: 44px;
        height: 44px;
    }

    .tutorial-card__play svg {
        width: 16px;
        height: 16px;
        margin-left: 2px;
    }

    .knowledge-modal {
        padding: 14px;
    }

    .knowledge-modal__dialog {
        width: min(100%, calc(100vw - 20px));
        gap: 18px;
        padding: 18px;
        border-radius: 22px;
    }

    .knowledge-modal__header {
        gap: 14px;
    }
}