.cns-page .container {
    max-width: 1440px;
}

.cns-view-selector {
    margin-bottom: 8px;
}

.cns-filter-chip,
.cns-category-emblem,
.cns-section-card,
.cns-section-chip,
.cns-flow-card,
.cns-note-card,
.cns-image-card,
.cns-page .card {
    --cns-rgb: 139 166 255;
}

.cns-filter-chip {
    background: linear-gradient(180deg, rgb(var(--cns-rgb) / 0.14), rgb(var(--cns-rgb) / 0.08));
    border-color: rgb(var(--cns-rgb) / 0.26);
    color: rgb(var(--cns-rgb) / 0.96);
}

.cns-filter-chip.is-active {
    background: linear-gradient(135deg, rgb(var(--cns-rgb) / 0.34), rgb(var(--cns-rgb) / 0.2));
    border-color: rgb(var(--cns-rgb) / 0.54);
    box-shadow: 0 0 0 1px rgb(var(--cns-rgb) / 0.1), 0 12px 28px rgb(var(--cns-rgb) / 0.12);
}

.cns-page .card .card-front {
    border-color: rgb(var(--cns-rgb) / 0.22);
    background:
        linear-gradient(160deg, rgb(var(--cns-rgb) / 0.16), rgba(8, 18, 40, 0.52)),
        linear-gradient(160deg, rgba(12, 28, 60, 0.55), rgba(8, 18, 40, 0.35));
}

.cns-page .card .card-back {
    border-color: rgb(var(--cns-rgb) / 0.26);
    background:
        linear-gradient(160deg, rgb(var(--cns-rgb) / 0.28), rgba(8, 18, 40, 0.3)),
        linear-gradient(160deg, rgba(14, 29, 58, 0.72), rgba(9, 18, 36, 0.64));
}

.cns-category-emblem {
    color: rgb(var(--cns-rgb) / 0.96);
    background: rgb(var(--cns-rgb) / 0.16);
    border-color: rgb(var(--cns-rgb) / 0.34);
}

.cns-learning-stage {
    margin-top: 24px;
    display: grid;
    gap: 22px;
}

.cns-learning-stage[hidden] {
    display: none !important;
}

.cns-section-card {
    position: relative;
    padding: 22px;
    border-radius: 28px;
    border: 1px solid rgb(var(--cns-rgb) / 0.2);
    background:
        radial-gradient(circle at 84% 16%, rgb(var(--cns-rgb) / 0.12), transparent 32%),
        linear-gradient(155deg, rgba(8, 18, 38, 0.94), rgba(12, 28, 58, 0.78));
    box-shadow: 0 24px 48px rgba(4, 10, 22, 0.28);
    overflow: hidden;
}

.cns-section-card::before {
    content: "";
    position: absolute;
    inset: 0;
    background:
        radial-gradient(circle at 12% 20%, rgb(var(--cns-rgb) / 0.08), transparent 24%),
        repeating-linear-gradient(128deg, rgba(255, 255, 255, 0.018) 0 2px, transparent 2px 8px);
    opacity: 0.7;
    pointer-events: none;
}

.cns-section-head,
.cns-chip-row,
.cns-flow-stack,
.cns-note-grid,
.cns-image-grid {
    position: relative;
    z-index: 1;
}

.cns-section-title-wrap {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 10px;
}

.cns-section-title-wrap h2 {
    margin: 0;
    color: rgb(var(--cns-rgb) / 0.98);
    font-size: clamp(26px, 3vw, 34px);
    line-height: 1.05;
}

.cns-section-summary {
    margin: 14px 0 0;
    max-width: 880px;
    color: rgba(232, 241, 255, 0.82);
    font-size: 16px;
}

.cns-chip-row {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 18px;
}

.cns-section-chip {
    display: inline-flex;
    align-items: center;
    min-height: 34px;
    padding: 0 14px;
    border-radius: 999px;
    border: 1px solid rgb(var(--cns-rgb) / 0.24);
    background: rgb(var(--cns-rgb) / 0.1);
    color: rgb(var(--cns-rgb) / 0.96);
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 0.04em;
    text-transform: uppercase;
}

.cns-flow-stack {
    display: grid;
    gap: 14px;
    margin-top: 18px;
}

.cns-flow-card,
.cns-note-card,
.cns-image-card {
    border-radius: 22px;
    border: 1px solid rgb(var(--cns-rgb) / 0.16);
    background: rgba(5, 13, 26, 0.64);
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.035);
}

.cns-flow-card {
    padding: 16px 18px;
}

.cns-panel-eyebrow {
    margin: 0 0 10px;
    color: rgb(var(--cns-rgb) / 0.92);
    font-size: 11px;
    font-weight: 800;
    letter-spacing: 0.16em;
    text-transform: uppercase;
}

.cns-flow-line {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 10px;
}

.cns-flow-step {
    display: inline-flex;
    align-items: center;
    min-height: 34px;
    padding: 0 14px;
    border-radius: 999px;
    background: rgb(var(--cns-rgb) / 0.12);
    border: 1px solid rgb(var(--cns-rgb) / 0.18);
    color: #f1f7ff;
    font-weight: 700;
    letter-spacing: 0.01em;
}

.cns-flow-arrow {
    color: rgb(var(--cns-rgb) / 0.9);
    font-weight: 800;
}

.cns-note-grid {
    margin-top: 18px;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 16px;
}

.cns-note-card {
    padding: 16px 18px 14px;
}

.cns-note-list {
    margin: 0;
    padding-left: 20px;
}

.cns-note-list li {
    margin-bottom: 8px;
    color: rgba(236, 243, 255, 0.92);
}

.cns-image-grid {
    margin-top: 18px;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 16px;
}

.cns-image-card {
    overflow: hidden;
    cursor: zoom-in;
    transition: transform 180ms ease, border-color 180ms ease, box-shadow 180ms ease;
}

.cns-image-card:hover,
.cns-image-card:focus-visible {
    transform: translateY(-3px);
    border-color: rgb(var(--cns-rgb) / 0.34);
    box-shadow: 0 18px 36px rgba(4, 10, 22, 0.28), 0 0 0 1px rgb(var(--cns-rgb) / 0.16);
    outline: none;
}

.cns-image-card img {
    display: block;
    width: auto;
    max-width: 100%;
    max-height: 320px;
    object-fit: contain;
    margin: 0 auto;
    background: rgba(255, 255, 255, 0.94);
    transition: transform 180ms ease;
}

.cns-image-card:hover img,
.cns-image-card:focus-visible img {
    transform: scale(1.015);
}

.cns-image-card figcaption {
    margin: 0;
    padding: 12px 14px 14px;
    color: rgba(236, 243, 255, 0.78);
    font-size: 13px;
    line-height: 1.5;
}

.cns-empty-state {
    padding: 28px 24px;
    border-radius: 22px;
    border: 1px solid rgba(255, 255, 255, 0.12);
    background: rgba(6, 14, 28, 0.56);
    text-align: center;
}

.cns-empty-state h2 {
    margin: 0 0 10px;
    color: var(--text);
}

.cns-empty-state p {
    margin: 0;
    color: var(--muted);
}

body.cns-image-viewer-open {
    overflow: hidden;
}

.cns-image-viewer[hidden] {
    display: none !important;
}

.cns-image-viewer {
    position: fixed;
    inset: 0;
    z-index: 1600;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 28px;
    background: rgba(5, 12, 24, 0.78);
    backdrop-filter: blur(8px);
}

.cns-image-viewer-panel {
    position: relative;
    width: min(92vw, 1280px);
    max-height: calc(100vh - 56px);
    margin: 0;
    padding: 54px 18px 18px;
    border-radius: 28px;
    border: 1px solid rgba(255, 255, 255, 0.14);
    background:
        linear-gradient(160deg, rgba(9, 20, 40, 0.98), rgba(8, 16, 34, 0.94)),
        radial-gradient(circle at 50% 0%, rgba(133, 183, 255, 0.12), transparent 40%);
    box-shadow: 0 36px 80px rgba(0, 0, 0, 0.42);
    overflow: auto;
}

.cns-image-viewer-close {
    position: absolute;
    top: 14px;
    right: 14px;
    width: 42px;
    height: 42px;
    border: 1px solid rgba(255, 255, 255, 0.16);
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.06);
    color: rgba(241, 247, 255, 0.92);
    font-size: 28px;
    line-height: 1;
    cursor: pointer;
}

.cns-image-viewer-close:hover,
.cns-image-viewer-close:focus-visible {
    background: rgba(255, 255, 255, 0.12);
    outline: none;
}

.cns-image-viewer-panel img {
    display: block;
    max-width: 100%;
    width: auto;
    max-height: min(72vh, 980px);
    margin: 0 auto;
    border-radius: 18px;
    background: rgba(255, 255, 255, 0.98);
    box-shadow: 0 20px 44px rgba(0, 0, 0, 0.24);
}

.cns-image-viewer-caption {
    margin-top: 16px;
}

.cns-image-viewer-title {
    margin: 0 0 6px;
    color: #f1f7ff;
    font-size: 18px;
    font-weight: 700;
}

.cns-image-viewer-text {
    margin: 0;
    color: rgba(236, 243, 255, 0.82);
    font-size: 15px;
    line-height: 1.6;
}

@media (max-width: 980px) {
    .cns-section-card {
        padding: 18px;
    }
}

@media (max-width: 720px) {
    .cns-note-grid,
    .cns-image-grid {
        grid-template-columns: 1fr;
    }

    .cns-section-title-wrap h2 {
        font-size: 24px;
    }

    .cns-section-summary {
        font-size: 15px;
    }

    .cns-image-viewer {
        padding: 16px;
    }

    .cns-image-viewer-panel {
        width: min(96vw, 1280px);
        max-height: calc(100vh - 32px);
        padding: 52px 14px 16px;
        border-radius: 24px;
    }

    .cns-image-viewer-panel img {
        max-height: min(64vh, 820px);
    }
}