.vtg-app {
    --vtg-text: #10203a;
    --vtg-accent: #1c7ed6;
    --vtg-accent-soft: #e7f2ff;
    --vtg-line: #d8e1ee;
    color: var(--vtg-text);
    background: linear-gradient(180deg, #edf4ff 0%, #f8fafc 100%);
    border: 1px solid #e1e7f0;
    border-radius: 28px;
    padding: 28px;
    box-shadow: 0 18px 48px rgba(16, 32, 58, 0.08);
}

.vtg-hero,
.vtg-layout,
.vtg-grid-3,
.vtg-status,
.vtg-actions,
.vtg-admin__split {
    display: grid;
    gap: 16px;
}

.vtg-hero {
    grid-template-columns: 1.5fr 1fr;
    margin-bottom: 24px;
}

.vtg-eyebrow {
    text-transform: uppercase;
    letter-spacing: 0.16em;
    color: #5a718f;
    font-size: 12px;
    margin: 0 0 8px;
}

.vtg-hero h2,
.vtg-panel h3 {
    margin: 0 0 8px;
}

.vtg-hero__note,
.vtg-panel {
    background: #ffffff;
    border: 1px solid var(--vtg-line);
    border-radius: 24px;
    padding: 20px;
}

.vtg-layout {
    grid-template-columns: 1.1fr 1.4fr 0.8fr;
    align-items: start;
}

.vtg-grid-3 {
    grid-template-columns: repeat(3, minmax(0, 1fr));
}

.vtg-panel label span,
.vtg-status span,
.vtg-section-title p,
.vtg-cue span {
    display: block;
    color: #58708d;
    font-size: 13px;
    margin-bottom: 6px;
}

.vtg-panel select,
.vtg-panel input[type="range"] {
    width: 100%;
}

.vtg-actions {
    grid-template-columns: repeat(3, minmax(0, 1fr));
}

.vtg-status {
    grid-template-columns: repeat(3, minmax(0, 1fr));
}

.vtg-status > div {
    background: var(--vtg-accent-soft);
    border-radius: 18px;
    padding: 14px;
}

.vtg-status strong {
    font-size: 24px;
}

.vtg-panel--viewer canvas,
.vtg-panel--history canvas {
    width: 100%;
    height: auto;
    border-radius: 20px;
    display: block;
}

.vtg-panel--viewer {
    position: relative;
}

.vtg-viewer-fullscreen {
    position: absolute;
    top: 16px;
    right: 16px;
    z-index: 3;
    border: 0;
    border-radius: 999px;
    padding: 10px 14px;
    background: rgba(12, 23, 38, 0.76);
    color: #ffffff;
    font-size: 13px;
    line-height: 1;
    cursor: pointer;
    backdrop-filter: blur(8px);
}

.vtg-cue {
    margin-top: 14px;
    padding: 14px 16px;
    border-radius: 18px;
    background: #f7f9fc;
}

.vtg-input-guide {
    margin-top: 8px;
    font-size: 13px;
    color: #39536f;
    line-height: 1.45;
}

.vtg-history-table {
    margin-top: 16px;
    overflow-x: auto;
}

.vtg-guide-card {
    margin-top: 8px;
    padding: 16px 18px;
    border-radius: 18px;
    background: #f7f9fc;
}

.vtg-guide-card h4 {
    margin: 0 0 10px;
}

.vtg-guide-list {
    margin: 0;
    padding-left: 18px;
}

.vtg-guide-list li {
    margin-bottom: 8px;
    line-height: 1.55;
}

.vtg-mode-help {
    margin-top: 14px;
    display: grid;
    gap: 8px;
}

.vtg-mode-help p {
    margin: 0;
    line-height: 1.5;
    font-size: 13px;
}

.vtg-protocols {
    display: grid;
    gap: 10px;
    margin-top: 10px;
}

.vtg-protocol-card {
    padding: 12px 14px;
    border-radius: 16px;
    background: #ffffff;
    border: 1px solid #d8e1ee;
}

.vtg-protocol-card strong,
.vtg-protocol-card p {
    display: block;
    margin: 0 0 8px;
}

.vtg-protocol-card__tip {
    color: #5c738d;
    font-size: 13px;
}

.vtg-programs {
    display: grid;
    gap: 10px;
    margin-top: 10px;
}

.vtg-program-card {
    padding: 14px;
    border-radius: 16px;
    background: linear-gradient(180deg, #f7fbff 0%, #ffffff 100%);
    border: 1px solid #d6e3f2;
    transition: border-color 0.2s ease, box-shadow 0.2s ease, transform 0.2s ease;
}

.vtg-program-card.is-active {
    border-color: #1c7ed6;
    box-shadow: 0 14px 30px rgba(28, 126, 214, 0.14);
    transform: translateY(-1px);
}

.vtg-program-card strong,
.vtg-program-card p {
    display: block;
    margin: 0 0 8px;
}

.vtg-program-card__phase {
    color: #5c738d;
    font-size: 13px;
}

.vtg-program-card__tip {
    color: #6a7f97;
    font-size: 12px;
}

.vtg-program-card [data-vtg-apply-program] {
    position: relative;
    z-index: 1;
    cursor: pointer;
    pointer-events: auto;
}

.vtg-program-card [data-vtg-apply-program].is-active {
    background: #1c7ed6;
    border-color: #1c7ed6;
    color: #ffffff;
    box-shadow: 0 8px 18px rgba(28, 126, 214, 0.22);
}

.vtg-program-status {
    margin-top: 10px;
    padding: 12px 14px;
    border-radius: 16px;
    background: #eef6ff;
    border: 1px solid #cfe0f4;
}

.vtg-program-status p,
.vtg-program-status strong {
    display: block;
    margin: 0 0 6px;
}

.vtg-history-table table {
    width: 100%;
    border-collapse: collapse;
}

.vtg-history-table th,
.vtg-history-table td {
    padding: 10px 12px;
    border-bottom: 1px solid var(--vtg-line);
    text-align: left;
    font-size: 13px;
}

.vtg-assessment__shape {
    min-height: 150px;
    display: grid;
    place-items: center;
}

.vtg-assessment__setup,
.vtg-assessment__explain {
    display: grid;
    gap: 10px;
    margin-bottom: 14px;
}

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

.vtg-assessment__explain {
    padding: 14px;
    border-radius: 16px;
    background: #f8fbff;
}

.vtg-assessment__explain p,
.vtg-summary-card p {
    margin: 0;
    line-height: 1.5;
}

.vtg-optotype-wrap {
    display: grid;
    place-items: center;
    gap: 10px;
}

.vtg-optotype-meta {
    font-size: 13px;
    color: #58708d;
}

.vtg-optotype {
    position: relative;
    box-sizing: border-box;
}

.vtg-optotype--landolt {
    border: var(--vtg-stroke) solid #10203a;
    border-radius: 999px;
}

.vtg-optotype--landolt::after {
    content: '';
    position: absolute;
    top: calc(var(--vtg-stroke) * -1);
    left: 50%;
    width: var(--vtg-gap);
    height: calc(var(--vtg-stroke) * 2.6);
    transform: translateX(-50%);
    background: #ffffff;
}

.vtg-optotype--e {
    border-left: var(--vtg-stroke) solid #10203a;
}

.vtg-optotype--e::before,
.vtg-optotype--e::after {
    content: '';
    position: absolute;
    left: 0;
    height: var(--vtg-stroke);
    background: #10203a;
}

.vtg-optotype--e::before {
    top: 0;
    width: 100%;
    box-shadow: 0 calc(50% - var(--vtg-stroke) / 2) 0 0 #10203a, 0 calc(100% - var(--vtg-stroke)) 0 0 #10203a;
}

.vtg-optotype--e::after {
    top: calc(50% - var(--vtg-stroke) / 2);
    width: 68%;
}

.vtg-optotype--square-gap {
    border: var(--vtg-stroke) solid #10203a;
}

.vtg-optotype--square-gap::after {
    content: '';
    position: absolute;
    top: calc(var(--vtg-stroke) * -1);
    left: 50%;
    width: var(--vtg-gap);
    height: calc(var(--vtg-stroke) * 2.4);
    transform: translateX(-50%);
    background: #ffffff;
}

.vtg-optotype--chevron::before,
.vtg-optotype--chevron::after {
    content: '';
    position: absolute;
    top: 50%;
    width: 62%;
    height: var(--vtg-stroke);
    background: #10203a;
    transform-origin: left center;
}

.vtg-optotype--chevron::before {
    left: 18%;
    transform: translateY(-50%) rotate(45deg);
}

.vtg-optotype--chevron::after {
    left: 18%;
    transform: translateY(-50%) rotate(-45deg);
}

.vtg-assessment__actions {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 10px;
}

.vtg-assessment__summary {
    margin-top: 14px;
}

.vtg-summary-card {
    padding: 14px;
    border-radius: 16px;
    background: #fff7e8;
    border: 1px solid #f3d29c;
}

.vtg-summary-card strong {
    display: block;
    margin-bottom: 8px;
}

@media (max-width: 1024px) {
    .vtg-hero,
    .vtg-layout,
    .vtg-grid-3,
    .vtg-actions,
    .vtg-status,
    .vtg-assessment__setup {
        grid-template-columns: 1fr;
    }

    .vtg-app {
        padding: 18px;
        border-radius: 20px;
    }

    .vtg-panel--viewer canvas {
        min-height: 56vh;
        object-fit: contain;
        background: #0c1726;
    }

    .vtg-viewer-fullscreen {
        top: 12px;
        right: 12px;
        padding: 12px 16px;
        font-size: 14px;
    }

    .vtg-panel,
    .vtg-hero__note {
        padding: 16px;
        border-radius: 18px;
    }

    .vtg-status strong {
        font-size: 28px;
    }
}

.vtg-app:fullscreen {
    width: 100vw;
    height: 100vh;
    max-width: none;
    padding: 12px;
    border-radius: 0;
    overflow: auto;
    background: linear-gradient(180deg, #e9f2ff 0%, #f8fbff 100%);
}

.vtg-app:fullscreen .vtg-layout {
    grid-template-columns: 1fr;
}

.vtg-app:fullscreen .vtg-panel--viewer canvas {
    min-height: 68vh;
    max-height: 74vh;
    background: #0c1726;
}

.vtg-app:fullscreen .vtg-viewer-fullscreen {
    top: 14px;
    right: 14px;
}

.vtg-app:fullscreen .vtg-hero {
    grid-template-columns: 1fr;
}

.vtg-app:fullscreen .vtg-actions,
.vtg-app:fullscreen .vtg-status {
    grid-template-columns: repeat(2, minmax(0, 1fr));
}