/* ── SpeakAI English · Frontend · Light Theme ────────────────────── */

.speakai-wrap {
    --sai-blue:       #2563EB;
    --sai-blue-light: #EFF6FF;
    --sai-blue-mid:   #DBEAFE;
    --sai-cyan:       #0891B2;
    --sai-border:     #E2E8F0;
    --sai-bg:         #FFFFFF;
    --sai-bg-page:    #F8FAFC;
    --sai-text:       #1E293B;
    --sai-muted:      #64748B;
    --sai-hint:       #94A3B8;
    --sai-radius:     16px;
    --sai-shadow:     0 4px 24px rgba(37, 99, 235, 0.08), 0 1px 4px rgba(0,0,0,0.06);

    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--sai-bg);
    border: 1px solid var(--sai-border);
    border-radius: var(--sai-radius);
    box-shadow: var(--sai-shadow);
    overflow: hidden;
    max-width: 720px;
    margin: 2rem auto;
    display: flex;
    flex-direction: column;
}

/* ── Header ──────────────────────────────────────────────────────── */

.speakai-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem 1.25rem;
    border-bottom: 1px solid var(--sai-border);
    background: var(--sai-bg);
    flex-shrink: 0;
}

.speakai-header-left {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.speakai-avatar {
    width: 40px;
    height: 40px;
    border-radius: 12px;
    background: var(--sai-blue-light);
    color: var(--sai-blue);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.speakai-title {
    font-size: 14px;
    font-weight: 600;
    color: var(--sai-text);
    line-height: 1.3;
}

.speakai-subtitle {
    font-size: 12px;
    color: var(--sai-muted);
    display: flex;
    align-items: center;
    gap: 0.35rem;
    margin-top: 1px;
}

.speakai-online-dot {
    display: inline-block;
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: #22C55E;
    animation: sai-pulse 2s ease-in-out infinite;
}

@keyframes sai-pulse {
    0%, 100% { opacity: 1; }
    50%       { opacity: 0.5; }
}

.speakai-btn-reset {
    display: flex;
    align-items: center;
    gap: 0.35rem;
    font-size: 12px;
    color: var(--sai-muted);
    background: none;
    border: 1px solid var(--sai-border);
    border-radius: 8px;
    padding: 0.4rem 0.75rem;
    cursor: pointer;
    font-family: inherit;
    transition: all 0.15s;
    white-space: nowrap;
}

.speakai-btn-reset:hover {
    color: var(--sai-text);
    border-color: var(--sai-muted);
    background: var(--sai-bg-page);
}

/* ── Messages area ───────────────────────────────────────────────── */

.speakai-messages {
    flex: 1;
    overflow-y: auto;
    padding: 1.25rem;
    background: var(--sai-bg-page);
    display: flex;
    flex-direction: column;
    gap: 1rem;
    scroll-behavior: smooth;
}

.speakai-messages::-webkit-scrollbar { width: 4px; }
.speakai-messages::-webkit-scrollbar-track { background: transparent; }
.speakai-messages::-webkit-scrollbar-thumb { background: var(--sai-border); border-radius: 2px; }

/* ── Message bubbles ─────────────────────────────────────────────── */

.sai-msg {
    display: flex;
    gap: 0.6rem;
    align-items: flex-end;
    max-width: 90%;
    animation: sai-fade-in 0.2s ease;
}

@keyframes sai-fade-in {
    from { opacity: 0; transform: translateY(6px); }
    to   { opacity: 1; transform: translateY(0); }
}

.sai-msg.sai-msg-user {
    flex-direction: row-reverse;
    align-self: flex-end;
}

.sai-msg-avatar {
    width: 30px;
    height: 30px;
    border-radius: 50%;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 11px;
    font-weight: 700;
}

.sai-msg.sai-msg-ai .sai-msg-avatar {
    background: var(--sai-blue-light);
    color: var(--sai-blue);
}

.sai-msg.sai-msg-user .sai-msg-avatar {
    background: var(--sai-blue);
    color: #fff;
}

.sai-msg-bubble {
    padding: 0.65rem 1rem;
    border-radius: 14px;
    font-size: 14px;
    line-height: 1.6;
    white-space: pre-wrap;
    word-break: break-word;
}

.sai-msg.sai-msg-ai .sai-msg-bubble {
    background: var(--sai-bg);
    border: 1px solid var(--sai-border);
    color: var(--sai-text);
    border-bottom-left-radius: 4px;
}

.sai-msg.sai-msg-user .sai-msg-bubble {
    background: var(--sai-blue);
    color: #fff;
    border-bottom-right-radius: 4px;
}

/* ── Typing indicator ────────────────────────────────────────────── */

.sai-typing {
    display: flex;
    align-items: center;
    gap: 4px;
    padding: 0.65rem 1rem;
}

.sai-typing-dot {
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: var(--sai-hint);
    animation: sai-bounce 1.2s ease-in-out infinite;
}

.sai-typing-dot:nth-child(1) { animation-delay: 0s; }
.sai-typing-dot:nth-child(2) { animation-delay: 0.2s; }
.sai-typing-dot:nth-child(3) { animation-delay: 0.4s; }

@keyframes sai-bounce {
    0%, 80%, 100% { transform: scale(0.6); opacity: 0.4; }
    40%            { transform: scale(1);   opacity: 1; }
}

/* ── Error message ───────────────────────────────────────────────── */

.sai-msg-error .sai-msg-bubble {
    background: #FEF2F2;
    border-color: #FECACA;
    color: #B91C1C;
}

/* ── Input area ──────────────────────────────────────────────────── */

.speakai-input-area {
    padding: 0.875rem 1rem 0.75rem;
    border-top: 1px solid var(--sai-border);
    background: var(--sai-bg);
    flex-shrink: 0;
}

.speakai-input-row {
    display: flex;
    align-items: flex-end;
    gap: 0.5rem;
}

.speakai-textarea {
    flex: 1;
    border: 1px solid var(--sai-border);
    border-radius: 10px;
    padding: 0.6rem 0.875rem;
    font-size: 14px;
    font-family: inherit;
    color: var(--sai-text);
    background: var(--sai-bg-page);
    resize: none;
    line-height: 1.5;
    max-height: 120px;
    overflow-y: auto;
    outline: none;
    transition: border-color 0.15s, box-shadow 0.15s;
}

.speakai-textarea:focus {
    border-color: var(--sai-blue);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.12);
    background: #fff;
}

.speakai-textarea::placeholder { color: var(--sai-hint); }

.speakai-btn-mic,
.speakai-btn-send {
    width: 40px;
    height: 40px;
    border-radius: 10px;
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    transition: all 0.15s;
}

.speakai-btn-mic {
    background: var(--sai-bg-page);
    border: 1px solid var(--sai-border);
    color: var(--sai-muted);
}

.speakai-btn-mic:hover { background: var(--sai-blue-light); color: var(--sai-blue); border-color: var(--sai-blue); }

.speakai-btn-mic.is-listening {
    background: #FEF2F2;
    border-color: #FCA5A5;
    color: #DC2626;
    animation: sai-mic-pulse 1s ease-in-out infinite;
}

@keyframes sai-mic-pulse {
    0%, 100% { box-shadow: 0 0 0 0 rgba(220, 38, 38, 0.3); }
    50%       { box-shadow: 0 0 0 6px rgba(220, 38, 38, 0); }
}

.speakai-btn-send {
    background: var(--sai-blue);
    color: #fff;
}

.speakai-btn-send:hover { background: #1D4ED8; }
.speakai-btn-send:disabled { background: var(--sai-border); cursor: not-allowed; }

.speakai-hint {
    font-size: 11px;
    color: var(--sai-hint);
    margin-top: 0.4rem;
    text-align: right;
}

/* ── Utility ─────────────────────────────────────────────────────── */
.hidden { display: none !important; }

/* ── Responsive ──────────────────────────────────────────────────── */
@media (max-width: 480px) {
    .speakai-wrap { margin: 1rem; border-radius: 12px; }
    .speakai-header { padding: 0.75rem 1rem; }
    .speakai-btn-reset span { display: none; }
    .speakai-hint { display: none; }
}