/*
 * Composer — centered input card with docked actions row (DeepSeek-style layout).
 */

.composer-card {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-4) var(--space-3);
    background: var(--chat-surface);
    border: 1px solid var(--chat-border);
    border-radius: 16px;
    transition: border-color var(--chat-transition);
}

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

#chatInput {
    width: 100%;
    min-height: 2.75rem;
    max-height: 200px;
    border: none;
    background: transparent;
    resize: none;
    font: inherit;
    font-size: var(--font-size-base);
    line-height: 1.55;
    color: var(--chat-text);
    padding: var(--space-1) 0;
}

#chatInput:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
    border-radius: var(--radius-sm);
}

#chatInput::placeholder {
    color: var(--chat-text-muted);
}

.composer-actions {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-3);
    min-height: 36px;
}

.composer-hint {
    margin: 0;
    font-size: var(--font-size-xs);
    color: var(--chat-text-muted);
    line-height: 1.4;
    user-select: none;
}

.send-btn {
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border: none;
    border-radius: var(--radius-full);
    background: var(--chat-surface-hover);
    color: var(--chat-text-muted);
    cursor: pointer;
    transition: background var(--chat-transition), color var(--chat-transition), opacity var(--chat-transition), transform var(--chat-transition), box-shadow var(--chat-transition);
}

.send-btn:not(:disabled) {
    background: var(--chat-accent);
    color: var(--bg-primary);
    box-shadow: 0 4px 12px -4px rgba(15, 118, 110, 0.5);
}

.send-btn:hover:not(:disabled) {
    background: var(--chat-accent-hover);
    transform: translateY(-1px);
}

.send-btn:disabled {
    opacity: 0.55;
    cursor: not-allowed;
}

.send-btn svg {
    display: block;
}

@media (max-width: 640px) {
    .composer-card {
        padding: var(--space-3);
        border-radius: var(--radius-lg);
    }

    .composer-hint {
        font-size: 0.7rem;
    }

    .send-btn {
        width: 40px;
        height: 40px;
    }
}

@media (max-width: 480px) {
    .composer-hint {
        display: none;
    }

    .composer-actions {
        justify-content: flex-end;
    }
}