/* Vanish — shared styles */
:root {
    --bg:        #0b0b12;
    --bg-2:      #12121d;
    --card:      rgba(255, 255, 255, 0.045);
    --card-brd:  rgba(255, 255, 255, 0.09);
    --txt:       #eceaf5;
    --txt-dim:   #9a97ad;
    --accent:    #8b5cf6;
    --accent-2:  #ec4899;
    --good:      #34d399;
    --danger:    #fb7185;
    --radius:    18px;
    --shadow:    0 20px 60px rgba(0, 0, 0, 0.45);
}

* { box-sizing: border-box; }

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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    color: var(--txt);
    background:
        radial-gradient(1200px 700px at 12% -10%, rgba(139, 92, 246, 0.18), transparent 60%),
        radial-gradient(1000px 600px at 100% 0%, rgba(236, 72, 153, 0.14), transparent 55%),
        linear-gradient(180deg, var(--bg), var(--bg-2));
    background-attachment: fixed;
    -webkit-font-smoothing: antialiased;
    line-height: 1.5;
}

a { color: var(--accent); text-decoration: none; }

.wordmark {
    font-weight: 800;
    letter-spacing: -0.02em;
    background: linear-gradient(90deg, var(--accent), var(--accent-2));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

/* ---------- Landing ---------- */
.landing {
    max-width: 560px;
    margin: 0 auto;
    padding: 64px 22px 80px;
}
.hero {
    text-align: center;
    margin-bottom: 30px;
}
.brand {
    font-size: 24px;
    font-weight: 800;
    letter-spacing: -0.01em;
    margin-bottom: 26px;
}
.headline {
    font-size: clamp(36px, 9vw, 56px);
    line-height: 1.05;
    letter-spacing: -0.035em;
    margin: 0 0 16px;
}
.sub {
    color: var(--txt-dim);
    font-size: 16.5px;
    margin: 0 auto;
    max-width: 470px;
}
.sub b { color: var(--txt); }

.pills {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    justify-content: center;
    margin-top: 22px;
}
.pill {
    font-size: 12.5px;
    font-weight: 600;
    color: var(--txt);
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid var(--card-brd);
    border-radius: 999px;
    padding: 7px 13px;
}

.promise {
    margin-top: 22px;
    text-align: center;
    background: linear-gradient(180deg, rgba(251, 113, 133, 0.10), rgba(139, 92, 246, 0.07));
    border: 1px solid rgba(251, 113, 133, 0.22);
    border-radius: var(--radius);
    padding: 24px 22px;
}
.promise h2 {
    font-size: 18px;
    margin: 0 0 9px;
    letter-spacing: -0.01em;
}
.promise p {
    color: var(--txt-dim);
    font-size: 14px;
    margin: 0 auto;
    max-width: 440px;
}
.promise b { color: var(--txt); }

.card {
    background: var(--card);
    border: 1px solid var(--card-brd);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 26px;
    backdrop-filter: blur(14px);
}

label {
    display: block;
    font-size: 13px;
    font-weight: 600;
    color: var(--txt-dim);
    margin: 0 0 7px;
}

.field { margin-bottom: 18px; }

.input-row { display: flex; gap: 10px; }

input[type=text], textarea {
    width: 100%;
    background: rgba(0, 0, 0, 0.28);
    border: 1px solid var(--card-brd);
    border-radius: 12px;
    color: var(--txt);
    font: inherit;
    padding: 14px 16px;
    outline: none;
    transition: border-color .15s, box-shadow .15s;
}
input[type=text]:focus, textarea:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(139, 92, 246, 0.22);
}
input::placeholder, textarea::placeholder { color: #6d6a80; }

.btn {
    border: none;
    border-radius: 12px;
    font: inherit;
    font-weight: 700;
    cursor: pointer;
    padding: 14px 20px;
    color: #fff;
    background: linear-gradient(90deg, var(--accent), var(--accent-2));
    transition: transform .08s, filter .15s;
    white-space: nowrap;
}
.btn:hover { filter: brightness(1.08); }
.btn:active { transform: translateY(1px); }
.btn[disabled] { opacity: .55; cursor: default; }
.btn-block { width: 100%; }

.btn-ghost {
    background: rgba(255, 255, 255, 0.06);
    color: var(--txt);
    border: 1px solid var(--card-brd);
}

.dice {
    flex: 0 0 auto;
    padding: 0 16px;
    font-size: 20px;
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid var(--card-brd);
    border-radius: 12px;
    color: var(--txt);
    cursor: pointer;
}
.dice:hover { filter: brightness(1.25); }

.steps {
    margin: 34px 0 0;
    display: grid;
    gap: 14px;
}
.step {
    display: flex;
    gap: 14px;
    align-items: flex-start;
    color: var(--txt-dim);
    font-size: 14px;
}
.step .num {
    flex: 0 0 auto;
    width: 26px; height: 26px;
    border-radius: 50%;
    display: grid; place-items: center;
    font-weight: 700; font-size: 13px;
    color: #fff;
    background: linear-gradient(135deg, var(--accent), var(--accent-2));
}
.step b { color: var(--txt); font-weight: 600; }

.note {
    margin-top: 28px;
    text-align: center;
    font-size: 13px;
    color: var(--txt-dim);
}

.foot {
    text-align: center;
    margin-top: 40px;
    font-size: 12px;
    color: #5a5770;
}

/* ---------- Chat room ---------- */
.room {
    max-width: 780px;
    margin: 0 auto;
    height: 100dvh;
    display: flex;
    flex-direction: column;
    padding: 0 14px;
}
.room-head {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 16px 6px 12px;
    border-bottom: 1px solid var(--card-brd);
}
.room-head .back {
    color: var(--txt-dim);
    font-size: 22px;
    line-height: 1;
}
.room-head .meta { flex: 1; min-width: 0; }
.room-head .meta .name {
    font-weight: 700;
    font-size: 17px;
    white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.room-head .meta .code {
    font-size: 12.5px;
    color: var(--txt-dim);
    font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
}
.copy-btn {
    flex: 0 0 auto;
    font-size: 13px;
    font-weight: 600;
    padding: 9px 14px;
    border-radius: 10px;
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid var(--card-brd);
    color: var(--txt);
    cursor: pointer;
}
.copy-btn:hover { filter: brightness(1.25); }

.banner {
    text-align: center;
    font-size: 12.5px;
    color: var(--txt-dim);
    padding: 9px;
    background: rgba(251, 113, 133, 0.08);
    border-bottom: 1px solid var(--card-brd);
}
.banner b { color: var(--danger); }

.messages {
    flex: 1;
    overflow-y: auto;
    padding: 18px 4px;
    display: flex;
    flex-direction: column;
    gap: 12px;
}
.empty {
    margin: auto;
    text-align: center;
    color: var(--txt-dim);
    font-size: 14px;
    max-width: 280px;
}

.msg {
    background: var(--card);
    border: 1px solid var(--card-brd);
    border-radius: 14px;
    padding: 11px 14px 9px;
    max-width: 82%;
    align-self: flex-start;
    animation: pop .18s ease;
    transition: opacity .4s;
}
.msg.mine {
    align-self: flex-end;
    background: linear-gradient(135deg, rgba(139, 92, 246, 0.32), rgba(236, 72, 153, 0.28));
    border-color: rgba(236, 72, 153, 0.35);
}
.msg .sender {
    font-size: 12px;
    font-weight: 700;
    color: var(--accent);
    margin-bottom: 2px;
}
.msg.mine .sender { color: #f0c9ff; }
.msg .body {
    font-size: 15px;
    white-space: pre-wrap;
    word-break: break-word;
}
.msg .life {
    margin-top: 7px;
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 10.5px;
    color: var(--txt-dim);
}
.msg .bar {
    flex: 1;
    height: 3px;
    border-radius: 3px;
    background: rgba(255, 255, 255, 0.1);
    overflow: hidden;
}
.msg .bar > i {
    display: block;
    height: 100%;
    background: linear-gradient(90deg, var(--good), var(--accent));
    border-radius: 3px;
    transition: width 1s linear;
}
.msg.dying { opacity: .35; }
.msg.dying .bar > i { background: var(--danger); }

@keyframes pop {
    from { opacity: 0; transform: translateY(8px) scale(.98); }
    to   { opacity: 1; transform: none; }
}

.composer {
    display: flex;
    gap: 10px;
    align-items: flex-end;
    padding: 12px 4px calc(14px + env(safe-area-inset-bottom));
    border-top: 1px solid var(--card-brd);
}
.composer .name-in {
    flex: 0 0 118px;
}
.composer textarea {
    flex: 1;
    resize: none;
    max-height: 130px;
    min-height: 48px;
}
.composer .send {
    flex: 0 0 auto;
    height: 48px;
    padding: 0 20px;
}

.toast {
    position: fixed;
    left: 50%;
    bottom: 26px;
    transform: translateX(-50%) translateY(20px);
    background: #1c1c2b;
    border: 1px solid var(--card-brd);
    color: var(--txt);
    padding: 11px 18px;
    border-radius: 12px;
    font-size: 14px;
    box-shadow: var(--shadow);
    opacity: 0;
    pointer-events: none;
    transition: opacity .2s, transform .2s;
    z-index: 50;
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }