:root {
    color-scheme: light dark;
    font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    background: #f4f7f4;
    color: #172018;
}

* {
    box-sizing: border-box;
}

body {
    min-width: 320px;
    min-height: 100vh;
    margin: 0;
    background:
        radial-gradient(circle at 8% 0%, rgba(92, 180, 123, 0.16), transparent 32rem),
        #f4f7f4;
}

a {
    color: inherit;
}

.site-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    min-height: 68px;
    padding: 0 5vw;
    border-bottom: 1px solid #d8e1d9;
    background: rgba(255, 255, 255, 0.82);
    backdrop-filter: blur(18px);
}

.brand {
    display: flex;
    align-items: center;
    gap: 0.7rem;
    text-decoration: none;
}

.brand img {
    width: 34px;
    height: 34px;
    object-fit: contain;
}

.brand b {
    color: #287347;
}

nav {
    display: flex;
    gap: 1.25rem;
    font-size: 0.9rem;
}

nav a {
    color: #536157;
    text-decoration: none;
}

nav a:hover {
    color: #237445;
}

main {
    width: min(1120px, 90vw);
    margin: 0 auto;
    padding: 4.5rem 0 5rem;
}

.hero {
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    gap: 2rem;
    margin-bottom: 2.4rem;
}

.eyebrow {
    margin: 0 0 0.75rem;
    color: #287347;
    font-size: 0.76rem;
    font-weight: 800;
    letter-spacing: 0.13em;
    text-transform: uppercase;
}

h1 {
    max-width: 760px;
    margin: 0;
    font-size: clamp(2.2rem, 5vw, 4.25rem);
    line-height: 1.02;
    letter-spacing: -0.05em;
}

.summary {
    max-width: 760px;
    margin: 1.25rem 0 0;
    color: #536157;
    font-size: 1.05rem;
    line-height: 1.65;
}

.runtime-badge,
.state-badge,
.language-badge {
    flex: none;
    border: 1px solid #bddac6;
    border-radius: 999px;
    background: #e8f6ec;
    color: #23653e;
    font-size: 0.75rem;
    font-weight: 750;
}

.runtime-badge {
    display: flex;
    align-items: center;
    gap: 0.55rem;
    padding: 0.65rem 0.9rem;
}

.runtime-badge i {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: #38a362;
    box-shadow: 0 0 0 4px rgba(56, 163, 98, 0.14);
}

.workspace {
    display: grid;
    grid-template-columns: minmax(0, 1.08fr) minmax(340px, 0.92fr);
    gap: 1.2rem;
}

.panel,
.boundary {
    overflow: hidden;
    border: 1px solid #d8e1d9;
    border-radius: 18px;
    background: rgba(255, 255, 255, 0.9);
    box-shadow: 0 18px 50px rgba(31, 58, 39, 0.07);
}

.panel-title {
    display: flex;
    align-items: center;
    justify-content: space-between;
    min-height: 49px;
    padding: 0 1.2rem;
    border-bottom: 1px solid #e0e7e1;
    color: #4c5b50;
    font-size: 0.79rem;
    font-weight: 750;
    letter-spacing: 0.04em;
    text-transform: uppercase;
}

.language-badge,
.state-badge {
    padding: 0.25rem 0.55rem;
    letter-spacing: 0;
    text-transform: none;
}

.state-badge.running {
    border-color: #ebd49a;
    background: #fff7df;
    color: #7b5b13;
}

.state-badge.passed {
    border-color: #acd2b7;
    background: #e5f7ea;
    color: #1f6a3b;
}

.state-badge.failed {
    border-color: #e3b2b2;
    background: #fff0f0;
    color: #9a3030;
}

.source-panel pre,
.output {
    overflow: auto;
    margin: 0;
    font: 0.9rem/1.7 "Cascadia Code", "SFMono-Regular", Consolas, monospace;
}

.source-panel pre {
    min-height: 260px;
    padding: 1.5rem;
    background: #101712;
    color: #dbe9dd;
}

.source-note {
    margin: 0;
    padding: 1rem 1.2rem;
    border-top: 1px solid #e0e7e1;
    color: #68746b;
    font-size: 0.82rem;
    line-height: 1.55;
}

.execution-panel {
    padding-bottom: 1.2rem;
}

.execution-panel .panel-title {
    margin-bottom: 0.2rem;
}

.artifact-evidence {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0;
    margin: 0;
    padding: 0.9rem 1.2rem 1rem;
}

.artifact-evidence div {
    min-width: 0;
    padding: 0.65rem 0.5rem 0.65rem 0;
}

.artifact-evidence dt {
    color: #778279;
    font-size: 0.7rem;
    font-weight: 750;
    letter-spacing: 0.05em;
    text-transform: uppercase;
}

.artifact-evidence dd {
    overflow: hidden;
    margin: 0.32rem 0 0;
    color: #263129;
    font: 0.78rem/1.4 "Cascadia Code", "SFMono-Regular", Consolas, monospace;
    text-overflow: ellipsis;
}

button {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.55rem;
    width: calc(100% - 2.4rem);
    min-height: 46px;
    margin: 0 1.2rem 1rem;
    border: 0;
    border-radius: 10px;
    background: #277648;
    color: white;
    cursor: pointer;
    font: inherit;
    font-weight: 750;
}

button:hover {
    background: #1d653b;
}

button:disabled {
    cursor: wait;
    opacity: 0.62;
}

button svg {
    width: 18px;
    fill: currentColor;
}

.output {
    min-height: 166px;
    margin: 0 1.2rem;
    padding: 1rem;
    border: 1px solid #d7dfd8;
    border-radius: 10px;
    background: #f5f8f5;
    color: #2c3930;
    white-space: pre-wrap;
    overflow-wrap: anywhere;
}

.boundary {
    margin-top: 1.2rem;
    padding: 1.5rem;
}

.boundary h2 {
    margin: 0 0 1.1rem;
    font-size: 1.15rem;
}

.boundary-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1rem;
}

.boundary-grid p {
    margin: 0;
    padding: 1rem;
    border-radius: 12px;
    background: #f3f7f4;
}

.boundary-grid b,
.boundary-grid span {
    display: block;
}

.boundary-grid span,
.boundary-note {
    color: #657168;
    font-size: 0.82rem;
    line-height: 1.55;
}

.boundary-grid span {
    margin-top: 0.35rem;
}

.boundary-note {
    margin: 1.15rem 0 0;
}

@media (prefers-color-scheme: dark) {
    :root {
        background: #0e1310;
        color: #e4ede6;
    }

    body {
        background:
            radial-gradient(circle at 8% 0%, rgba(66, 146, 94, 0.17), transparent 32rem),
            #0e1310;
    }

    .site-header,
    .panel,
    .boundary {
        border-color: #29342c;
        background: rgba(20, 27, 22, 0.92);
    }

    .site-header {
        background: rgba(14, 19, 16, 0.84);
    }

    nav a,
    .summary,
    .source-note,
    .boundary-grid span,
    .boundary-note {
        color: #9daa9f;
    }

    .panel-title,
    .source-note {
        border-color: #29342c;
    }

    .panel-title {
        color: #afbab1;
    }

    .artifact-evidence dt {
        color: #879289;
    }

    .artifact-evidence dd {
        color: #e0e9e2;
    }

    .output,
    .boundary-grid p {
        border-color: #303b33;
        background: #111814;
        color: #d7e2d9;
    }

    .runtime-badge,
    .language-badge,
    .state-badge.ready {
        border-color: #305f40;
        background: #173122;
        color: #82d09c;
    }
}

@media (max-width: 820px) {
    .hero {
        align-items: flex-start;
        flex-direction: column;
    }

    .workspace,
    .boundary-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 560px) {
    .site-header {
        align-items: flex-start;
        flex-direction: column;
        gap: 0.8rem;
        padding-top: 1rem;
        padding-bottom: 1rem;
    }

    main {
        width: min(92vw, 1120px);
        padding-top: 3rem;
    }

    nav {
        width: 100%;
        justify-content: space-between;
    }

    .artifact-evidence {
        grid-template-columns: 1fr;
    }
}