:root {
    color-scheme: dark;

    --bg: #05080a;
    --bg-soft: #070d10;
    --green: #36d27a;
    --green-dim: #1f7e4c;
    --green-faint: #123a26;
    --amber: #ffb000;
    --glow: rgba(54, 210, 122, 0.45);

    /* result phosphor — overwritten per model in JS */
    --ph: #36d27a;
    --ph-dim: #1f7e4c;
    --ph-glow: rgba(54, 210, 122, 0.4);

    --mono: ui-monospace, "SF Mono", "JetBrains Mono", "Cascadia Code", Menlo, Consolas, monospace;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html,
body {
    height: 100%;
}

body {
    background: #000;
    color: var(--green);
    font-family: var(--mono);
    font-size: 14px;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

button {
    font: inherit;
    color: inherit;
    background: none;
    border: 0;
    cursor: pointer;
}

b {
    color: var(--amber);
    font-weight: 700;
}

/* ----------------------------------------------------------- terminal frame */

.term {
    display: flex;
    flex-direction: column;
    height: 100dvh;
    max-width: 920px;
    margin: 0 auto;
    background: var(--bg);
    position: relative;
    overflow: hidden;
}

/* scanlines + vignette */
.term::after {
    content: "";
    position: absolute;
    inset: 0;
    pointer-events: none;
    z-index: 5;
    background:
        repeating-linear-gradient(0deg, rgba(0, 0, 0, 0) 0, rgba(0, 0, 0, 0) 2px, rgba(0, 0, 0, 0.18) 3px, rgba(0, 0, 0, 0.18) 3px),
        radial-gradient(120% 120% at 50% 50%, transparent 60%, rgba(0, 0, 0, 0.55) 100%);
    animation: flicker 4s infinite steps(60);
}

@keyframes flicker {
    0%, 96%, 100% { opacity: 1; }
    97% { opacity: 0.92; }
    98% { opacity: 0.97; }
}

/* ---------------------------------------------------------------- chrome bar */

.chrome {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 11px 16px;
    border-bottom: 1px solid var(--green-faint);
    background: var(--bg-soft);
    z-index: 6;
    flex-shrink: 0;
}

.lights {
    display: flex;
    gap: 7px;
}

.lights span {
    width: 11px;
    height: 11px;
    border-radius: 50%;
    background: #2a2f2c;
}

.lights span:nth-child(1) { background: #ff5f57; }
.lights span:nth-child(2) { background: #febc2e; }
.lights span:nth-child(3) { background: #28c840; }

.chrome-title {
    font-size: 12px;
    color: var(--green-dim);
    letter-spacing: 0.02em;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.chrome-prog {
    margin-left: auto;
    font-size: 12px;
    letter-spacing: 0.12em;
    color: var(--green);
    white-space: nowrap;
    flex-shrink: 0;
}

.chrome-prog .on { color: var(--green); text-shadow: 0 0 6px var(--glow); }
.chrome-prog .off { color: var(--green-faint); }
.chrome-prog .num { color: var(--green-dim); }

/* -------------------------------------------------------------- screen body */

.screen {
    position: relative;
    z-index: 4;
    flex: 1;
    overflow-y: auto;
    padding: clamp(20px, 4vw, 40px) clamp(18px, 4vw, 44px) 40px;
}

.scr {
    max-width: 720px;
    animation: scrIn 0.32s ease both;
}

[hidden] {
    display: none !important;
}

@keyframes scrIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.dim { color: var(--green-dim); }
.amber { color: var(--amber); }
.user { color: var(--green); }
.path { color: var(--green-dim); }

/* ------------------------------------------------------------------ quiz */

.q-body.is-entering {
    animation: qEnter 0.38s cubic-bezier(0.22, 1, 0.36, 1) both;
}

.q-body.is-leaving {
    animation: qLeave 0.22s ease forwards;
}

@keyframes qEnter {
    from { opacity: 0; transform: translateY(14px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes qLeave {
    from { opacity: 1; transform: translateY(0); }
    to { opacity: 0; transform: translateY(-11px); }
}

.boot {
    margin-bottom: 22px;
    font-size: 13px;
}

.boot p {
    white-space: nowrap;
    overflow: hidden;
}

.q-head {
    color: var(--amber);
    font-size: 12px;
    letter-spacing: 0.22em;
    margin-bottom: 10px;
    text-shadow: 0 0 7px rgba(255, 176, 0, 0.35);
}

.q-text {
    font-size: clamp(20px, 3.6vw, 28px);
    font-weight: 700;
    line-height: 1.25;
    letter-spacing: -0.01em;
    color: #c8f7dc;
    text-shadow: 0 0 9px var(--glow);
    margin-bottom: 22px;
}

.opts {
    display: flex;
    flex-direction: column;
    gap: 4px;
    margin-bottom: 20px;
}

.opt {
    display: flex;
    align-items: baseline;
    gap: 12px;
    width: 100%;
    text-align: left;
    padding: 9px 12px;
    border: 1px solid transparent;
    border-radius: 4px;
    font-size: clamp(14px, 1.9vw, 16px);
    line-height: 1.4;
    color: var(--green);
    transition: background 0.12s, color 0.12s, border-color 0.12s;
}

.opt::before {
    content: "·";
    color: var(--green-dim);
    transition: color 0.12s;
}

.opt-key {
    color: var(--amber);
    flex-shrink: 0;
    font-weight: 700;
}

.opt:hover,
.opt:focus-visible {
    outline: none;
    border-color: var(--green-faint);
    background: rgba(54, 210, 122, 0.06);
}

.opt:hover::before,
.opt.is-selected::before {
    content: ">";
    color: var(--amber);
}

.opt.is-selected {
    background: var(--green);
    color: var(--bg);
    border-color: var(--green);
    text-shadow: none;
    transform-origin: left center;
    box-shadow: 0 0 18px var(--glow);
    animation: optPop 0.36s cubic-bezier(0.22, 1, 0.36, 1);
}

@keyframes optPop {
    0% { transform: scale(1); }
    32% { transform: scale(1.018); }
    100% { transform: scale(1); }
}

/* dim the options the user didn't choose so the pick reads clearly */
.opts.is-locked .opt:not(.is-selected) {
    opacity: 0.32;
    transition: opacity 0.2s;
}

.opt.is-selected .opt-key {
    color: var(--bg);
}

.opt.is-selected::before {
    color: var(--bg);
}

.prompt {
    font-size: 15px;
    color: var(--amber);
    margin-bottom: 18px;
}

.echo {
    color: var(--green);
}

.cursor {
    display: inline-block;
    width: 9px;
    height: 17px;
    background: var(--green);
    vertical-align: -3px;
    margin-left: 2px;
    box-shadow: 0 0 8px var(--glow);
    animation: blink 1.05s steps(2) infinite;
}

@keyframes blink {
    50% { opacity: 0; }
}

.blink {
    animation: blink 1.05s steps(2) infinite;
}

.hint {
    font-size: 12px;
    color: var(--green-dim);
}

.hint b {
    color: var(--green);
    font-weight: 700;
}

/* -------------------------------------------------------------- analyzing */

.scr-analyzing p {
    font-size: 15px;
}

.an-line {
    margin-top: 14px;
    color: var(--green);
}

.spin {
    color: var(--amber);
    display: inline-block;
    width: 1ch;
}

.an-bar {
    margin-top: 18px;
    height: 14px;
    max-width: 320px;
    border: 1px solid var(--green-dim);
    border-radius: 2px;
    padding: 2px;
}

.an-fill {
    display: block;
    height: 100%;
    width: 0;
    background: var(--green);
    box-shadow: 0 0 10px var(--glow);
    transition: width 0.2s linear;
}

/* ----------------------------------------------------------------- result */

.scr-result {
    color: var(--ph);
}

.r-banner {
    display: inline-block;
    font-size: clamp(15px, 2.4vw, 18px);
    font-weight: 700;
    letter-spacing: 0.12em;
    color: var(--ph);
    border: 1px solid var(--ph-dim);
    border-radius: 3px;
    padding: 7px 14px;
    margin-bottom: 24px;
    text-shadow: 0 0 9px var(--ph-glow);
}

.r-head {
    display: flex;
    align-items: center;
    gap: 18px;
    margin-bottom: 18px;
}

.r-logo {
    flex-shrink: 0;
    display: grid;
    place-items: center;
    width: 68px;
    height: 68px;
    aspect-ratio: 1 / 1;
    border: 1.5px solid var(--ph-dim);
    border-radius: 14px;
    color: var(--ph);
    background: rgba(255, 255, 255, 0.02);
    box-shadow: inset 0 0 20px -8px var(--ph-glow);
}

.r-logo img {
    width: 40px;
    height: 40px;
    object-fit: contain;
    display: block;
    filter: drop-shadow(0 0 7px var(--ph-glow));
}

/* single-color marks (openai, grok) are dark by default — whiten them */
.r-logo img.is-mono {
    filter: brightness(0) invert(1) drop-shadow(0 0 7px var(--ph-glow));
}

.r-head-text {
    min-width: 0;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.r-name {
    font-size: clamp(28px, 6vw, 46px);
    font-weight: 800;
    letter-spacing: -0.02em;
    line-height: 1;
    color: var(--ph);
    text-shadow: 0 0 16px var(--ph-glow);
    text-transform: uppercase;
}

.r-meta {
    margin-top: 6px;
    font-size: 13px;
    color: var(--ph-dim);
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.r-title {
    font-size: clamp(15px, 2.4vw, 18px);
    font-weight: 700;
    color: var(--ph);
    opacity: 0.95;
}

.r-tagline {
    margin-top: 3px;
    font-size: 14px;
    font-style: italic;
    color: var(--ph-dim);
}

.r-blurb {
    margin-top: 16px;
    max-width: 60ch;
    font-size: 14.5px;
    line-height: 1.65;
    color: color-mix(in srgb, var(--ph) 82%, #fff 18%);
}

.r-stats {
    margin-top: 22px;
    display: flex;
    flex-direction: column;
    gap: 5px;
    padding: 16px 18px;
    border: 1px solid var(--ph-dim);
    border-radius: 6px;
    background: rgba(255, 255, 255, 0.02);
}

.stat {
    display: grid;
    grid-template-columns: 92px 1fr auto;
    gap: 12px;
    align-items: center;
    font-size: 13px;
}

.stat-label {
    color: var(--ph-dim);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-size: 11px;
}

.stat-bar {
    letter-spacing: 1px;
    white-space: nowrap;
    overflow: hidden;
}

.stat-bar .fill {
    color: var(--ph);
    text-shadow: 0 0 7px var(--ph-glow);
}

.stat-bar .empty {
    color: var(--ph-dim);
    opacity: 0.5;
}

.stat-val {
    color: var(--ph);
    font-weight: 700;
    text-align: right;
}

.r-also {
    margin-top: 20px;
    font-size: 13.5px;
    color: var(--ph-dim);
}

.r-also b {
    color: var(--ph);
}

.r-cmds {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 24px;
}

.cmd {
    padding: 10px 18px;
    border: 1px solid var(--ph);
    border-radius: 4px;
    color: var(--ph);
    font-size: 14px;
    font-weight: 600;
    letter-spacing: 0.02em;
    transition: background 0.15s, color 0.15s, box-shadow 0.15s;
}

.cmd .key {
    color: var(--ph-dim);
    margin-right: 4px;
}

.cmd:hover,
.cmd:focus-visible {
    outline: none;
    background: var(--ph);
    color: var(--bg);
    box-shadow: 0 0 18px var(--ph-glow);
}

.cmd:hover .key,
.cmd:focus-visible .key {
    color: var(--bg);
}

.r-note {
    min-height: 18px;
    margin-top: 14px;
    font-size: 13px;
    color: var(--amber);
    opacity: 0;
    transition: opacity 0.25s;
}

.r-note.is-on {
    opacity: 1;
}

/* ------------------------------------------------------------ reduced motion */

@media (prefers-reduced-motion: reduce) {
    *,
    *::after,
    *::before {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }

    .cursor,
    .blink {
        opacity: 1;
    }
}

@media (max-width: 460px) {
    .stat {
        grid-template-columns: 76px 1fr auto;
        gap: 8px;
    }
    .term::after {
        display: none;
    }
}