:root {
    --bg: #fafafa;
    --fg: #111;
    --muted: #666;
    --line: #ddd;
    --field: #fff;
    --sans: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

@media (prefers-color-scheme: dark) {
    :root {
        --bg: #121212;
        --fg: #f2f2f2;
        --muted: #9a9a9a;
        --line: #333;
        --field: #1c1c1c;
    }
}

* { box-sizing: border-box; }

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

body {
    background: var(--bg);
    color: var(--fg);
    font-family: var(--sans);
    font-size: 17px;
    line-height: 1.4;
    -webkit-text-size-adjust: 100%;
    overscroll-behavior: none;
}

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

#composer {
    max-width: 34rem;
    margin: 0 auto;
    padding: max(1.25rem, env(safe-area-inset-top)) 1.25rem
             max(1.25rem, env(safe-area-inset-bottom));
}

h1 {
    margin: 0 0 1rem;
    font-size: 1.35rem;
    font-weight: 800;
    letter-spacing: -0.02em;
}

#message {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--line);
    border-radius: 10px;
    background: var(--field);
    color: inherit;
    font: inherit;
    font-size: 1.15rem;
    resize: vertical;
}

#message:focus {
    outline: 2px solid var(--fg);
    outline-offset: 1px;
}

#show {
    width: 100%;
    margin-top: 0.75rem;
    padding: 0.9rem;
    border: 0;
    border-radius: 10px;
    background: var(--fg);
    color: var(--bg);
    font: inherit;
    font-size: 1.15rem;
    font-weight: 700;
    cursor: pointer;
}

#show:disabled {
    opacity: 0.4;
    cursor: default;
}

#recent {
    margin-top: 1.75rem;
}

#recent h2 {
    margin: 0 0 0.5rem;
    font-size: 0.8rem;
    font-weight: 600;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--muted);
}

#recentList {
    margin: 0;
    padding: 0;
    list-style: none;
    border-top: 1px solid var(--line);
}

#recentList li {
    display: flex;
    align-items: stretch;
    border-bottom: 1px solid var(--line);
}

#recentList button {
    border: 0;
    background: none;
    color: inherit;
    font: inherit;
    cursor: pointer;
    text-align: left;
}

.pick {
    flex: 1;
    min-width: 0;
    padding: 0.7rem 0.5rem 0.7rem 0;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.drop {
    padding: 0 0.6rem;
    color: var(--muted);
    font-size: 1.1rem;
}

#hint {
    margin-top: 1.75rem;
    padding-top: 1rem;
    border-top: 1px solid var(--line);
    color: var(--muted);
    font-size: 0.9rem;
}

#hintOk {
    margin-left: 0.35rem;
    padding: 0.15rem 0.5rem;
    border: 1px solid var(--line);
    border-radius: 6px;
    background: none;
    color: inherit;
    font: inherit;
    font-size: 0.85rem;
    cursor: pointer;
}

/* --- the sign -------------------------------------------------------- */

#sign {
    position: fixed;
    inset: 0;
    z-index: 10;
    background: #fff;
    color: #000;
    overflow: hidden;
    cursor: pointer;
    touch-action: none;
    -webkit-user-select: none;
    user-select: none;
}

#sign[hidden] { display: none; }

/* Sized in px by app.js — the viewport box, minus a small margin, swapped
   width-for-height when the text is rotated. */
#signBox {
    position: absolute;
    top: 50%;
    left: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    transform: translate(-50%, -50%);
}

#sign.rot #signBox {
    transform: translate(-50%, -50%) rotate(90deg);
}

#signText {
    display: inline-block;
    max-width: 100%;
    font-weight: 800;
    line-height: 1.08;
    letter-spacing: -0.02em;
    text-align: center;
    white-space: pre-wrap;
    overflow-wrap: break-word;
}

#signExit {
    position: absolute;
    right: max(0.5rem, env(safe-area-inset-right));
    bottom: max(0.5rem, env(safe-area-inset-bottom));
    margin: 0;
    color: #d0d0d0;
    font-size: 0.7rem;
    letter-spacing: 0.06em;
    transition: opacity 0.6s;
}

#signExit.faded { opacity: 0; }