:root {
    --accent: #0a5c6b;
    --ink: #1c1c1c;
    --muted: #5c6670;
    --line: #d9dee2;
    --bg: #ffffff;
    --bg-soft: #f4f6f7;
    --warn: #8a4b00;
    --warn-bg: #fff4e5;
    --bad: #9b1c1c;
    --bad-bg: #fdecec;
}

* { box-sizing: border-box; }

html, body {
    margin: 0;
    height: 100%;
    background: var(--bg);
    color: var(--ink);
    font-family: system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    font-size: 16px;
    line-height: 1.5;
}

a { color: var(--accent); }

code, pre, textarea, input.url {
    font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

code { font-size: .9em; background: var(--bg-soft); padding: .05em .3em; border-radius: 3px; }

.loading { padding: 2rem 1rem; color: var(--muted); }

.site-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    padding: .6rem 1rem;
    border-bottom: 3px solid var(--accent);
}

.site-header .brand {
    font-weight: 700;
    text-decoration: none;
    color: var(--accent);
    letter-spacing: .02em;
}

.site-header nav a {
    margin-left: 1rem;
    text-decoration: none;
    color: var(--muted);
}

.site-header nav a.active { color: var(--accent); font-weight: 600; }

main {
    max-width: 52rem;
    margin: 0 auto;
    padding: 1rem;
}

.site-footer {
    max-width: 52rem;
    margin: 2rem auto 0;
    padding: 1rem;
    border-top: 1px solid var(--line);
    color: var(--muted);
    font-size: .85rem;
}

h1 { font-size: 1.5rem; margin: .5rem 0 .25rem; }
h1:focus { outline: none; }
h2 { font-size: 1.1rem; margin: 1.5rem 0 .25rem; color: var(--accent); }
.lede { color: var(--muted); margin-top: 0; }

.mode {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    align-items: center;
    margin: 1rem 0 .5rem;
}

.mode label { cursor: pointer; }
.mode .examples { color: var(--muted); font-size: .9rem; margin-left: auto; }

.fields { display: grid; gap: .75rem; grid-template-columns: 1fr; }
@media (min-width: 40rem) { .fields { grid-template-columns: 1fr 1fr; } }

label { display: block; font-size: .9rem; color: var(--muted); }

input[type="text"], textarea {
    display: block;
    width: 100%;
    margin-top: .2rem;
    padding: .5rem .6rem;
    font-size: 1rem;
    color: var(--ink);
    background: var(--bg);
    border: 1px solid var(--line);
    border-radius: 4px;
}

input[type="text"]:focus, textarea:focus { outline: 2px solid var(--accent); outline-offset: 1px; border-color: var(--accent); }
input[type="text"]:disabled { background: var(--bg-soft); color: var(--muted); }

.content-label { margin-top: .75rem; }

textarea {
    min-height: 18rem;
    resize: vertical;
    font-size: .9rem;
    line-height: 1.4;
    white-space: pre;
    overflow-wrap: normal;
    overflow-x: auto;
}

.stats {
    display: flex;
    flex-wrap: wrap;
    gap: .5rem 2rem;
    margin: .75rem 0;
}

.stats div { display: flex; gap: .4rem; align-items: baseline; }
.stats dt { color: var(--muted); font-size: .85rem; }
.stats dd { margin: 0; font-weight: 600; font-variant-numeric: tabular-nums; }

.warn { background: var(--warn-bg); color: var(--warn); border-left: 4px solid var(--warn); padding: .5rem .75rem; margin: .5rem 0; }
.warn.hard { background: var(--bad-bg); color: var(--bad); border-left-color: var(--bad); }

.actions {
    display: flex;
    flex-wrap: wrap;
    gap: .5rem;
    align-items: center;
    margin-top: .75rem;
}

.button {
    display: inline-block;
    padding: .5rem 1rem;
    font: inherit;
    font-weight: 600;
    color: var(--accent);
    background: var(--bg);
    border: 2px solid var(--accent);
    border-radius: 4px;
    text-decoration: none;
    cursor: pointer;
}

.button.primary { color: #fff; background: var(--accent); }
.button:hover { filter: brightness(1.1); }

input.url {
    flex: 1 1 16rem;
    min-width: 0;
    margin: 0;
    font-size: .85rem;
    color: var(--muted);
    background: var(--bg-soft);
    border: 1px solid var(--line);
    border-radius: 4px;
    padding: .5rem .6rem;
}

.view-bar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 16px;
    display: flex;
    align-items: center;
    gap: .4rem;
    padding: 0 .5rem;
    background: var(--accent);
    color: #fff;
    font-size: 11px;
    line-height: 16px;
    z-index: 10;
}

.view-bar.collapsed { left: auto; width: 24px; background: transparent; justify-content: flex-end; padding: 0; }
.view-bar a { color: #fff; }
.view-host { font-weight: 600; }
.view-sep { opacity: .7; }

.view-toggle {
    margin-left: auto;
    height: 16px;
    width: 24px;
    padding: 0;
    border: 0;
    background: var(--accent);
    color: #fff;
    font-size: 11px;
    line-height: 16px;
    cursor: pointer;
}

.view-frame {
    position: fixed;
    top: 16px;
    left: 0;
    width: 100vw;
    height: calc(100vh - 16px);
    border: 0;
    background: #fff;
}

.view-frame.full { top: 0; height: 100vh; }

.view-error { max-width: 36rem; margin: 3rem auto; padding: 0 1rem; }

#blazor-error-ui {
    display: none;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    padding: .6rem 1.25rem .7rem;
    background: var(--warn-bg);
    color: var(--warn);
    box-shadow: 0 -1px 2px rgba(0, 0, 0, .2);
    z-index: 1000;
}

#blazor-error-ui .dismiss { cursor: pointer; position: absolute; right: .75rem; top: .5rem; }