/* Warp Chat — styled in the Warppool design language.

   The layout is unchanged; only the visual language is swapped. Every color,
   font, and radius now comes from the Warppool USWDS-based design tokens
   (defined in colors_and_type.css): Merriweather serif for display, Source
   Sans for body, Roboto Mono for meta/code, the primary blue accent, ink text
   on white, hairline gray borders, and squared corners. The chat page's local
   variable names are re-pointed at those tokens so the whole UI inherits the
   site palette. */

:root {
    --paper:        var(--bg-1);              /* white page */
    --paper-raised: var(--bg-1);
    --ink:          var(--fg-1);              /* #1b1b1b */
    --ink-soft:     var(--fg-2);
    --ink-faint:    var(--fg-3);
    --hairline:     var(--border-default);
    --bubble:       var(--bg-2);              /* #f0f0f0 */
    --accent:       var(--color-primary);     /* USWDS primary blue */
    --accent-hover: var(--color-primary-dark);
    --accent-ink:   #ffffff;
    --good:         var(--color-success);     /* green */
    --warn:         var(--color-warning);     /* gold */
    --error-bg:     var(--color-red-5);
    --error-ink:    var(--color-secondary-dark);
    --serif:        var(--font-serif);
    --sans:         var(--font-sans);
    --mono:         var(--font-mono);
}

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

html, body { height: 100%; }

body {
    display: flex;
    flex-direction: column;
    font-family: var(--sans);
    background: var(--paper);
    color: var(--ink);
    -webkit-font-smoothing: antialiased;
}

/* ---------- header ---------- */

.chat-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.7rem 1.25rem;
    border-bottom: 1px solid var(--hairline);
    background: var(--paper);
    position: sticky;
    top: 0;
    z-index: 20;
}

.brand {
    display: inline-flex;
    align-items: center;
    gap: 0.55rem;
    text-decoration: none;
    color: var(--ink);
    font-size: 0.95rem;
}

.brand-name {
    font-family: var(--serif);
    font-weight: 700;
    font-size: 1.2rem;
    letter-spacing: -0.015em;
    color: var(--accent);
}
.brand-divider { color: var(--ink-faint); }
.brand-page {
    font-family: var(--mono);
    font-size: 0.78rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--ink-soft);
}

.header-right { display: flex; align-items: center; gap: 0.9rem; }

.pool-status {
    display: inline-flex;
    align-items: center;
    gap: 0.45rem;
    font-family: var(--mono);
    font-size: 0.75rem;
    color: var(--ink-soft);
    padding: 0.3rem 0.7rem;
    border: 1px solid var(--hairline);
    border-radius: 99rem;
    background: var(--paper-raised);
}

.pool-dot {
    width: 7px; height: 7px;
    border-radius: 50%;
    background: var(--ink-faint);
}

.pool-status--on .pool-dot {
    background: var(--good);
    box-shadow: 0 0 0 0 rgba(0, 169, 28, 0.5);
    animation: pool-pulse 2s ease-out infinite;
}
.pool-status--off .pool-dot { background: var(--warn); }

@keyframes pool-pulse {
    0%   { box-shadow: 0 0 0 0 rgba(0, 169, 28, 0.5); }
    70%  { box-shadow: 0 0 0 6px rgba(0, 169, 28, 0); }
    100% { box-shadow: 0 0 0 0 rgba(0, 169, 28, 0); }
}

.become-worker {
    font-family: var(--sans);
    font-size: 0.82rem;
    font-weight: 600;
    color: var(--accent);
    text-decoration: none;
}
.become-worker:hover { color: var(--accent-hover); text-decoration: underline; }

/* ---------- thread ---------- */

.scroll-region { flex: 1; overflow-y: auto; }

.thread {
    max-width: 44rem;
    margin: 0 auto;
    padding: 2rem 1.25rem 1rem;
    display: flex;
    flex-direction: column;
    gap: 1.4rem;
}

.empty-state {
    margin-top: 16vh;
    text-align: center;
}

.empty-title {
    font-family: var(--serif);
    font-weight: 700;
    font-size: 2.3rem;
    letter-spacing: -0.02em;
    line-height: 1.1;
    color: var(--ink);
}

.empty-sub {
    margin: 1rem auto 0;
    max-width: 30rem;
    color: var(--ink-soft);
    font-size: 1rem;
    line-height: 1.55;
}

.no-workers-card {
    margin: 2rem auto 0;
    max-width: 28rem;
    text-align: left;
    background: var(--bubble);
    border: 1px solid var(--hairline);
    border-left: 4px solid var(--accent);
    border-radius: 4px;
    padding: 1.1rem 1.25rem;
    font-size: 0.9rem;
    line-height: 1.55;
    color: var(--ink-soft);
}
.no-workers-card p + p { margin-top: 0.5rem; }
.no-workers-card strong { color: var(--ink); }
.no-workers-link {
    display: inline-block;
    margin-top: 0.7rem;
    color: var(--accent);
    font-weight: 600;
    text-decoration: none;
}
.no-workers-link:hover { color: var(--accent-hover); text-decoration: underline; }

/* ---------- turns ---------- */

.turn-user {
    align-self: flex-end;
    max-width: 85%;
    background: var(--bubble);
    border: 1px solid var(--hairline);
    border-radius: 10px 10px 2px 10px;
    padding: 0.7rem 1rem;
    font-size: 0.98rem;
    line-height: 1.55;
    white-space: pre-wrap;
    overflow-wrap: break-word;
}

.turn-assistant {
    align-self: stretch;
    font-size: 1rem;
    line-height: 1.65;
    color: var(--ink);
}

.turn-assistant .reply {
    white-space: pre-wrap;
    overflow-wrap: break-word;
}

.turn-assistant .reply code {
    font-family: var(--mono);
    font-size: 0.86em;
    background: var(--bubble);
    border-radius: 2px;
    padding: 0.1em 0.35em;
}

.turn-assistant .reply pre {
    background: var(--bg-dark);
    color: #e6eef5;
    border-radius: 4px;
    padding: 0.85rem 1rem;
    overflow-x: auto;
    margin: 0.6rem 0;
    font-family: var(--mono);
    font-size: 0.86rem;
    line-height: 1.6;
}
.turn-assistant .reply pre code { background: none; padding: 0; color: inherit; }

/* blinking caret while streaming */
.turn-assistant.streaming .reply::after {
    content: "";
    display: inline-block;
    width: 7px; height: 1.05em;
    margin-left: 2px;
    vertical-align: text-bottom;
    background: var(--accent);
    border-radius: 1px;
    animation: caret-blink 1s steps(2, start) infinite;
}

@keyframes caret-blink { to { visibility: hidden; } }

.turn-meta {
    margin-top: 0.45rem;
    font-family: var(--mono);
    font-size: 0.72rem;
    color: var(--ink-faint);
    display: flex;
    align-items: center;
    gap: 0.35rem;
}

.turn-meta .spark { color: var(--accent); }

.turn-thinking { color: var(--ink-faint); font-style: italic; }

.turn-error {
    align-self: stretch;
    background: var(--error-bg);
    color: var(--error-ink);
    border: 1px solid var(--color-red-30);
    border-radius: 4px;
    padding: 0.65rem 0.9rem;
    font-size: 0.88rem;
}

.session-note {
    align-self: center;
    font-family: var(--mono);
    font-size: 0.72rem;
    color: var(--ink-faint);
    border-top: 1px solid var(--hairline);
    border-bottom: 1px solid var(--hairline);
    padding: 0.35rem 1rem;
}

/* ---------- composer ---------- */

.composer-region {
    padding: 0.5rem 1.25rem calc(0.9rem + env(safe-area-inset-bottom));
    background: linear-gradient(to top, var(--paper) 70%, transparent);
}

.composer {
    max-width: 44rem;
    margin: 0 auto;
    display: flex;
    align-items: center;
    gap: 0.6rem;
    background: var(--paper-raised);
    border: 1px solid var(--hairline);
    border-radius: 8px;
    padding: 0.6rem 0.6rem 0.6rem 1.1rem;
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.05);
    transition: border-color 120ms ease, box-shadow 120ms ease;
}

.composer:focus-within {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(0, 94, 162, 0.12);
}

.composer-input {
    flex: 1;
    border: none;
    outline: none;
    resize: none;
    background: transparent;
    font-family: var(--sans);
    font-size: 1rem;
    line-height: 1.5;
    color: var(--ink);
    max-height: 10rem;
}

.composer-input::placeholder { color: var(--ink-faint); }

.composer-send {
    flex-shrink: 0;
    width: 36px; height: 36px;
    display: grid;
    place-items: center;
    border: none;
    border-radius: 4px;
    background: var(--accent);
    color: var(--accent-ink);
    cursor: pointer;
    transition: background-color 120ms ease, transform 80ms ease;
}

.composer-send:disabled { opacity: 0.35; cursor: default; }
.composer-send:not(:disabled):hover { background: var(--accent-hover); transform: translateY(-1px); }

.composer-note {
    max-width: 44rem;
    margin: 0.6rem auto 0;
    text-align: center;
    font-family: var(--mono);
    font-size: 0.72rem;
    color: var(--ink-faint);
}

@media (max-width: 560px) {
    .become-worker { display: none; }
    .empty-title { font-size: 1.8rem; }
    .thread { padding-top: 1.25rem; }
}