:root {
    --bg-1: #08111f;
    --bg-2: #0f172a;
    --card: rgba(15, 23, 42, 0.88);
    --card-border: rgba(148, 163, 184, 0.16);
    --text: #e5eefc;
    --muted: #8ea1bd;
    --primary: #2563eb;
    --primary-strong: #1d4ed8;
    --success: #16a34a;
    --danger: #dc2626;
    --bot: #1e293b;
    --user: linear-gradient(135deg, #2563eb, #1d4ed8);
    --shadow: 0 20px 60px rgba(0, 0, 0, 0.35);
    --radius-xl: 24px;
    --radius-lg: 18px;
    --radius-md: 14px;
}

* {
    box-sizing: border-box;
}

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

body {
    font-family: "Segoe UI", system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
    color: var(--text);
    background:
        radial-gradient(circle at top left, rgba(37, 99, 235, 0.14), transparent 28%),
        radial-gradient(circle at top right, rgba(22, 163, 74, 0.12), transparent 24%),
        linear-gradient(180deg, var(--bg-1), var(--bg-2));
}

.app-shell {
    min-height: 100vh;
    display: grid;
    place-items: center;
    padding: 24px;
}

.chat-card {
    width: 100%;
    max-width: 760px;
    min-height: 88vh;
    display: grid;
    grid-template-rows: auto auto 1fr auto auto;
    gap: 16px;
    padding: 20px;
    background: var(--card);
    border: 1px solid var(--card-border);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow);
    backdrop-filter: blur(14px);
}

.chat-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 7px;
    padding: 6px 2px 2px;
}

.brand {
    display: flex;
    align-items: center;
    gap: 14px;
}


.brand-avatar {
    width: 52px;
    height: 52px;
    border-radius: 50%;
    overflow: hidden;
    flex-shrink: 0;
    background: rgba(255, 255, 255, 0.08);
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid rgba(255, 255, 255, 0.12);
}

.brand-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}


.brand-text h1 {
    margin: 0;
    font-size: 1.35rem;
    line-height: 1.1;
}

.brand-text p {
    margin: 4px 0 0;
    color: var(--muted);
    font-size: 0.95rem;
}

.back-link {
    color: var(--muted);
    text-decoration: none;
    font-size: 0.95rem;
    transition: color 0.2s ease;
}

.back-link:hover {
    color: var(--text);
}

.status-bar {
    display: flex;
    align-items: center;
    gap: 10px;
    min-height: 22px;
    padding: 0 2px;
    color: var(--muted);
    font-size: 0.95rem;
}

.status-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: #64748b;
    flex: 0 0 auto;
}

.status-dot.active {
    background: var(--primary);
    box-shadow: 0 0 0 6px rgba(37, 99, 235, 0.14);
}

.status-dot.error {
    background: var(--danger);
    box-shadow: 0 0 0 6px rgba(220, 38, 38, 0.14);
}

.status-dot.listening {
    background: var(--success);
    box-shadow: 0 0 0 0 rgba(22, 163, 74, 0.4);
    animation: pulse 1.5s infinite;
}

.chat-messages {
    min-height: 420px;
    max-height: 100%;
    overflow-y: auto;
    padding: 6px 4px 6px 2px;
    display: flex;
    flex-direction: column;
    gap: 14px;
    scroll-behavior: smooth;
}

.chat-messages::-webkit-scrollbar {
    width: 10px;
}

.chat-messages::-webkit-scrollbar-thumb {
    background: rgba(148, 163, 184, 0.22);
    border-radius: 10px;
}

.msg-row {
    display: flex;
    width: 100%;
}

.msg-row.user {
    justify-content: flex-end;
}

.msg-row.bot {
    justify-content: flex-start;
}

.msg {
    max-width: min(82%, 560px);
    padding: 14px 16px;
    border-radius: 20px;
    line-height: 1.55;
    font-size: 15px;
    white-space: pre-wrap;
    word-break: break-word;
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.14);
}

.msg.user {
    background: var(--user);
    color: #fff;
    border-bottom-right-radius: 6px;
}

.msg.bot {
    background: var(--bot);
    color: var(--text);
    border: 1px solid rgba(148, 163, 184, 0.08);
    border-bottom-left-radius: 6px;
}

.quick-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.quick-btn {
    border: 1px solid rgba(148, 163, 184, 0.16);
    background: rgba(30, 41, 59, 0.8);
    color: var(--text);
    border-radius: 999px;
    padding: 10px 14px;
    cursor: pointer;
    font-size: 14px;
    transition: transform 0.18s ease, border-color 0.18s ease, background 0.18s ease;
}

.quick-btn:hover {
    transform: translateY(-1px);
    border-color: rgba(37, 99, 235, 0.5);
    background: rgba(37, 99, 235, 0.12);
}

.composer {
    display: grid;
    gap: 12px;
}

.input-wrap {
    background: rgba(2, 6, 23, 0.35);
    border: 1px solid rgba(148, 163, 184, 0.14);
    border-radius: 18px;
    padding: 10px 14px;
}

#text-input {
    width: 100%;
    min-height: 26px;
    max-height: 160px;
    resize: none;
    border: none;
    background: transparent;
    color: var(--text);
    font: inherit;
    line-height: 1.5;
}

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

#text-input:disabled {
    opacity: 0.7;
}

.composer-actions {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.btn {
    border: none;
    border-radius: 14px;
    padding: 13px 18px;
    color: #fff;
    font-weight: 600;
    font-size: 15px;
    cursor: pointer;
    transition: transform 0.18s ease, opacity 0.18s ease, filter 0.18s ease;
    display: inline-flex;
    align-items: center;
    gap: 10px;
}

.btn:hover {
    transform: translateY(-1px);
    filter: brightness(1.04);
}

.btn:disabled {
    opacity: 0.45;
    cursor: not-allowed;
    transform: none;
}

.btn-primary {
    background: linear-gradient(135deg, #2563eb, #1d4ed8);
}

.btn-success {
    background: linear-gradient(135deg, #16a34a, #15803d);
}

.btn-danger {
    background: linear-gradient(135deg, #ef4444, #dc2626);
}

.btn-indicator {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.95);
}

.is-recording {
    position: relative;
    animation: pulseBtn 1.4s infinite;
}

@keyframes pulse {
    0% { box-shadow: 0 0 0 0 rgba(22, 163, 74, 0.45); }
    70% { box-shadow: 0 0 0 10px rgba(22, 163, 74, 0); }
    100% { box-shadow: 0 0 0 0 rgba(22, 163, 74, 0); }
}

@keyframes pulseBtn {
    0% { box-shadow: 0 0 0 0 rgba(22, 163, 74, 0.35); }
    70% { box-shadow: 0 0 0 16px rgba(22, 163, 74, 0); }
    100% { box-shadow: 0 0 0 0 rgba(22, 163, 74, 0); }
}

@media (max-width: 768px) {
    .app-shell {
        padding: 12px;
    }

    .chat-card {
        min-height: 100vh;
        max-width: 100%;
        border-radius: 0;
        padding: 16px;
    }

    .chat-header {
        flex-direction: column;
        align-items: flex-start;
    }

    .chat-messages {
        min-height: 360px;
    }

    .msg {
        max-width: 90%;
    }

    .composer-actions {
        display: grid;
        grid-template-columns: 1fr 1fr 1fr;
    }

    .btn {
        justify-content: center;
    }
}

@media (max-width: 520px) {
    .quick-actions {
        display: grid;
        grid-template-columns: 1fr 1fr;
    }

    .composer-actions {
        grid-template-columns: 1fr;
    }

    .back-link {
        font-size: 0.9rem;
    }
}