.messages {
    min-height: 0;
    padding: 28px max(24px, calc((100% - 920px) / 2));
    overflow-y: auto;
    scroll-behavior: smooth;
}

.empty-chat {
    display: grid;
    min-height: 100%;
    place-content: center;
    padding-bottom: 10vh;
    text-align: center;
}

.empty-chat h1 {
    margin: 0 0 10px;
    font-size: clamp(28px, 5vw, 46px);
    letter-spacing: -0.04em;
}

.empty-chat p {
    max-width: 520px;
    margin: 0;
    color: var(--muted);
    line-height: 1.6;
}

.message {
    max-width: 920px;
    margin: 0 auto 28px;
}

.message-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    margin-bottom: 8px;
    color: var(--muted);
    font-size: 12px;
    font-weight: 700;
}

.message-identity,
.message-actions {
    display: flex;
    min-width: 0;
    align-items: center;
    gap: 7px;
}

.message-actions {
    flex-wrap: wrap;
    justify-content: flex-end;
}

.message-status {
    padding: 2px 6px;
    font-size: 10px;
    font-weight: 750;
    background: var(--surface-raised);
    border: 1px solid var(--border);
    border-radius: 999px;
}

.message-status[data-status="streaming"] {
    color: var(--accent-hover);
}

.message-status[data-status="stopped"],
.message-status[data-status="incomplete"] {
    color: var(--warning);
}

.message-status[data-status="error"] {
    color: var(--danger);
}

.copy-button,
.message-action-button {
    padding: 4px 8px;
    color: var(--muted);
    background: transparent;
    border-radius: 7px;
}

.copy-button:hover:not(:disabled),
.message-action-button:hover:not(:disabled) {
    color: var(--text);
    background: var(--surface-hover);
}

.message-action-button {
    color: var(--accent-hover);
}

.message-content {
    overflow-wrap: anywhere;
    font-size: 15px;
    line-height: 1.7;
    white-space: pre-wrap;
}

.message.user .message-content {
    width: fit-content;
    max-width: min(78%, 760px);
    margin-left: auto;
    padding: 12px 15px;
    background: var(--surface-raised);
    border: 1px solid var(--border);
    border-radius: 15px 15px 4px;
}

.message.assistant .message-content {
    padding: 4px 2px;
}

.message.assistant.incomplete .message-content,
.message.assistant.stopped .message-content {
    padding-left: 12px;
    border-left: 2px solid var(--warning);
}

.message.assistant.error .message-content {
    padding-left: 12px;
    border-left: 2px solid var(--danger);
}

.message-content.generating {
    color: var(--muted);
}

.message-content.placeholder {
    color: var(--muted);
    font-style: italic;
}

.message-meta {
    margin-top: 8px;
    color: var(--muted);
    font-size: 11px;
    line-height: 1.5;
}

.composer-area {
    padding: 12px max(24px, calc((100% - 920px) / 2)) 14px;
    background: linear-gradient(transparent, var(--background) 22%);
}

.composer {
    padding: 12px;
    background: var(--surface-raised);
    border: 1px solid var(--border-strong);
    border-radius: 16px;
    box-shadow: 0 16px 50px #00000042;
}

.composer:focus-within {
    border-color: var(--accent);
}

.composer textarea {
    width: 100%;
    min-height: 66px;
    max-height: 220px;
    padding: 3px;
    resize: vertical;
    background: transparent;
    border: 0;
    outline: 0;
    line-height: 1.5;
}

.composer-actions {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    margin-top: 8px;
}

.composer-actions span {
    color: var(--muted);
    font-size: 11px;
}

.stop-button {
    color: var(--danger);
    background: #ff6b7818;
    border: 1px solid #ff6b7844;
}

.disclaimer {
    margin: 8px 0 0;
    color: var(--muted);
    font-size: 10px;
    text-align: center;
}

.toast {
    position: fixed;
    z-index: 50;
    right: 22px;
    bottom: 22px;
    max-width: min(420px, calc(100vw - 44px));
    padding: 11px 14px;
    color: var(--text);
    background: var(--surface-hover);
    border: 1px solid var(--border-strong);
    border-radius: 10px;
    box-shadow: 0 15px 45px #0008;
    opacity: 0;
    pointer-events: none;
    transform: translateY(12px);
    transition: opacity 150ms ease, transform 150ms ease;
}

.toast.visible {
    opacity: 1;
    transform: translateY(0);
}

.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    overflow: hidden;
    clip-path: inset(50%);
    white-space: nowrap;
    border: 0;
}

@media (prefers-reduced-motion: reduce) {
    .messages {
        scroll-behavior: auto;
    }

    .toast {
        transition: none;
    }
}