:root {
    --ink: #eef7f2;
    --muted: #9aaba4;
    --deep: #071310;
    --panel: #0d1d18;
    --line: rgba(222, 244, 234, 0.16);
    --accent: #d9f58c;
    color-scheme: dark;
}

* { box-sizing: border-box; }

html,
body {
    min-height: 100%;
    margin: 0;
}

body {
    display: grid;
    grid-template-rows: auto minmax(560px, 1fr);
    background: var(--deep);
    color: var(--ink);
    font-family: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

a { color: inherit; }

.graph-header {
    display: grid;
    grid-template-columns: auto minmax(260px, 0.8fr) minmax(420px, 1.2fr);
    gap: clamp(1.5rem, 4vw, 4rem);
    align-items: end;
    padding: 2rem max(1.25rem, calc((100vw - 1280px) / 2));
    border-bottom: 1px solid var(--line);
}

.back-link {
    align-self: start;
    color: var(--muted);
    font-size: 0.82rem;
    font-weight: 700;
    text-decoration: none;
}

.back-link:hover,
.back-link:focus-visible { color: var(--accent); }

.kicker {
    margin: 0 0 0.5rem;
    color: var(--accent);
    font-size: 0.7rem;
    font-weight: 750;
    letter-spacing: 0.12em;
    text-transform: uppercase;
}

h1 {
    margin: 0 0 0.7rem;
    font-size: clamp(2rem, 4vw, 4rem);
    letter-spacing: -0.055em;
    line-height: 0.95;
}

.intro {
    max-width: 46rem;
    margin: 0;
    color: var(--muted);
    font-size: 0.92rem;
    line-height: 1.55;
}

.search-form {
    display: grid;
    grid-template-columns: 1fr 1fr auto;
    gap: 0.7rem;
    align-items: end;
}

label span {
    display: block;
    margin: 0 0 0.35rem 0.1rem;
    color: var(--muted);
    font-size: 0.68rem;
    font-weight: 720;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

input,
button {
    min-height: 3.15rem;
    border: 1px solid var(--line);
    border-radius: 0.35rem;
    font: inherit;
}

input {
    width: 100%;
    padding: 0.7rem 0.85rem;
    background: var(--panel);
    color: var(--ink);
}

button {
    padding: 0.7rem 1rem;
    border-color: var(--accent);
    background: var(--accent);
    color: var(--deep);
    font-size: 0.84rem;
    font-weight: 760;
    cursor: pointer;
}

button:disabled { cursor: wait; opacity: 0.58; }

:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 3px;
}

.status {
    grid-column: 3;
    margin: 0.25rem 0 0;
    color: var(--muted);
    font-size: 0.75rem;
}

#graph {
    min-height: 560px;
    background:
        radial-gradient(circle at 50% 40%, rgba(116, 185, 194, 0.08), transparent 38%),
        #07100e;
}

@media (max-width: 980px) {
    .graph-header { grid-template-columns: 1fr; align-items: start; }
    .back-link { margin-bottom: 1rem; }
    .status { grid-column: auto; }
}

@media (max-width: 640px) {
    body { grid-template-rows: auto minmax(500px, 65vh); }
    .search-form { grid-template-columns: 1fr; }
    #graph { min-height: 500px; }
}