/* MEX AI chat widget — premium redesign v2 */

.mex-ai-chat {
    --mex-ai-chat-z: 9990;
    --mex-ai-chat-bg: #0E1626;
    --mex-ai-chat-messages: #0B1220;
    --mex-ai-chat-surface: #101A2C;
    --mex-ai-chat-border: #25304A;
    --mex-ai-chat-divider: #20293F;
    --mex-ai-chat-primary: #2563EB;
    --mex-ai-chat-primary-hover: #1f55c7;
    --mex-ai-chat-text: #FFFFFF;
    --mex-ai-chat-muted: #9FB0CC;
    --mex-ai-chat-micro: #5C6B89;
    --mex-ai-chat-assistant: #18233A;
    --mex-ai-chat-assistant-border: #28344E;
    --mex-ai-chat-online: #22C55E;
    --mex-ai-chat-radius-panel: 12px;
    --mex-ai-chat-radius-bubble: 12px;
    --mex-ai-chat-radius-button: 10px;
    position: fixed;
    right: 16px;
    bottom: calc(16px + env(safe-area-inset-bottom, 0px));
    z-index: var(--mex-ai-chat-z);
    font-family: inherit;
    font-size: 0.9375rem;
    line-height: 1.45;
    color: var(--mex-ai-chat-text);
}

.mex-ai-chat,
.mex-ai-chat * {
    box-sizing: border-box;
}

.mex-ai-chat__toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 3.25rem;
    height: 3.25rem;
    border: 1px solid rgba(37, 99, 235, 0.55);
    border-radius: 50%;
    background: linear-gradient(140deg, #111c31 0%, #0f274f 100%);
    color: var(--mex-ai-chat-text);
    cursor: pointer;
    box-shadow: 0 12px 32px rgba(0, 0, 0, 0.4);
    transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.mex-ai-chat__toggle:hover {
    transform: translateY(-2px);
    box-shadow: 0 14px 32px rgba(37, 99, 235, 0.28);
}

.mex-ai-chat__toggle:focus-visible {
    outline: 2px solid var(--mex-ai-chat-primary);
    outline-offset: 2px;
}

.mex-ai-chat__toggle-icon {
    font-size: 1.25rem;
    line-height: 1;
}

.mex-ai-chat__panel {
    position: absolute;
    right: 0;
    bottom: calc(3.25rem + 0.75rem);
    display: flex;
    flex-direction: column;
    min-height: 0;
    width: 400px;
    max-width: calc(100vw - 24px);
    height: 620px;
    border: 1px solid var(--mex-ai-chat-border);
    border-radius: var(--mex-ai-chat-radius-panel);
    background: var(--mex-ai-chat-bg);
    box-shadow: 0 20px 52px rgba(3, 8, 17, 0.62);
    overflow: hidden;
}

.mex-ai-chat--open .mex-ai-chat__panel {
    display: flex;
}

.mex-ai-chat__panel[hidden] {
    display: none !important;
}

.mex-ai-chat__header {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    flex-shrink: 0;
    padding: 0.85rem 0.95rem 0.8rem;
    border-bottom: 1px solid var(--mex-ai-chat-divider);
    background: var(--mex-ai-chat-surface);
}

.mex-ai-chat__header-icon {
    width: 32px;
    height: 32px;
    min-width: 32px;
    border-radius: 11px;
    background: var(--mex-ai-chat-primary);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
}

.mex-ai-chat__headline {
    min-width: 0;
    flex: 1;
}

.mex-ai-chat__title {
    margin: 0;
    color: #fff;
    font-size: 17px;
    font-weight: 500;
    letter-spacing: 0.01em;
}

.mex-ai-chat__subtitle {
    margin: 0.18rem 0 0;
    font-size: 13px;
    color: var(--mex-ai-chat-muted);
}

.mex-ai-chat__status {
    margin: 0.32rem 0 0;
    font-size: 12px;
    color: #b8c7df;
    display: flex;
    align-items: center;
    gap: 0.35rem;
}

.mex-ai-chat__status-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--mex-ai-chat-online);
    box-shadow: 0 0 0 4px rgba(34, 197, 94, 0.18);
}

.mex-ai-chat__close {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    padding: 0;
    border: none;
    border-radius: 10px;
    background: transparent;
    color: var(--mex-ai-chat-muted);
    font-size: 1.2rem;
    line-height: 1;
    cursor: pointer;
}

.mex-ai-chat__close:hover {
    color: #fff;
    background: rgba(255, 255, 255, 0.08);
}

.mex-ai-chat__messages {
    flex: 1 1 auto;
    min-height: 0;
    overflow-y: auto;
    padding: 0.85rem 0.95rem;
    display: flex;
    flex-direction: column;
    gap: 0.58rem;
    background: var(--mex-ai-chat-messages);
}

.mex-ai-chat__row {
    display: flex;
    align-items: flex-end;
    gap: 0.5rem;
}

.mex-ai-chat__row--user {
    justify-content: flex-end;
}

.mex-ai-chat__row--assistant {
    justify-content: flex-start;
}

.mex-ai-chat__avatar {
    width: 28px;
    height: 28px;
    min-width: 28px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 0.03em;
    background: var(--mex-ai-chat-primary);
    color: #fff;
}

.mex-ai-chat__message {
    max-width: 84%;
    padding: 0.64rem 0.82rem;
    border-radius: var(--mex-ai-chat-radius-bubble);
    word-break: normal;
    overflow-wrap: anywhere;
    white-space: pre-wrap;
    font-size: 14.5px;
    line-height: 1.6;
}

.mex-ai-chat__message--user {
    color: #fff;
    background: var(--mex-ai-chat-primary);
    border: 1px solid rgba(37, 99, 235, 0.8);
    border-radius: 12px 12px 4px 12px;
}

.mex-ai-chat__message--assistant {
    color: #e9f1ff;
    background: var(--mex-ai-chat-assistant);
    border: 1px solid var(--mex-ai-chat-assistant-border);
    border-radius: 12px 12px 12px 4px;
}

.mex-ai-chat__message--system {
    align-self: center;
    max-width: 100%;
    padding: 0.5rem 0.65rem;
    font-size: 0.875rem;
    color: var(--mex-ai-chat-muted);
    background: transparent;
    border: 1px dashed rgba(255, 255, 255, 0.12);
}

.mex-ai-chat__message--system a {
    color: var(--mex-ai-chat-primary);
}

.mex-ai-chat__typing {
    display: flex;
    align-items: flex-end;
    gap: 0.5rem;
    flex-shrink: 0;
    padding: 0 0.95rem 0.55rem;
    background: var(--mex-ai-chat-messages);
}

.mex-ai-chat__typing[hidden] {
    display: none !important;
}

.mex-ai-chat__typing-bubble {
    display: inline-flex;
    align-items: center;
    gap: 0.42rem;
    padding: 0.5rem 0.7rem;
    border-radius: 12px 12px 12px 4px;
    background: var(--mex-ai-chat-assistant);
    border: 1px solid var(--mex-ai-chat-assistant-border);
    color: #d6e3fb;
    font-size: 13px;
}

.mex-ai-chat__typing-dots {
    display: inline-flex;
    align-items: center;
    gap: 0.2rem;
}

.mex-ai-chat__typing-dots span {
    width: 5px;
    height: 5px;
    border-radius: 50%;
    background: #8fb1ff;
    animation: mex-ai-chat-dot 1.2s ease-in-out infinite;
}

.mex-ai-chat__typing-dots span:nth-child(2) {
    animation-delay: 0.15s;
}

.mex-ai-chat__typing-dots span:nth-child(3) {
    animation-delay: 0.3s;
}

@keyframes mex-ai-chat-pulse {
    0%, 100% { opacity: 0.35; }
    50% { opacity: 1; }
}

@keyframes mex-ai-chat-dot {
    0%, 100% { transform: translateY(0); opacity: 0.35; }
    50% { transform: translateY(-2px); opacity: 1; }
}

.mex-ai-chat__form {
    display: flex;
    flex-direction: column;
    gap: 0.62rem;
    flex-shrink: 0;
    max-width: 100%;
    overflow-x: hidden;
    padding: 0.88rem 0.95rem 0.9rem;
    border-top: 1px solid var(--mex-ai-chat-divider);
    background: var(--mex-ai-chat-surface);
}

.mex-ai-chat__label {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

.mex-ai-chat__input {
    width: 100%;
    max-width: 100%;
    min-height: 46px;
    max-height: 120px;
    padding: 0.62rem 0.74rem;
    border: 1px solid #2A3650;
    border-radius: var(--mex-ai-chat-radius-panel);
    background: var(--mex-ai-chat-messages);
    color: var(--mex-ai-chat-text);
    font-family: inherit;
    font-size: 16px !important;
    line-height: 1.4 !important;
    transform: none;
    -webkit-text-size-adjust: 100%;
    text-size-adjust: 100%;
    resize: vertical;
}

.mex-ai-chat__input:focus,
.mex-ai-chat__input:focus-visible {
    outline: 2px solid var(--mex-ai-chat-primary);
    outline-offset: 0;
    border-color: transparent;
    font-size: 16px !important;
    line-height: 1.4 !important;
    transform: none !important;
    width: 100%;
    max-width: 100%;
}

.mex-ai-chat__submit {
    align-self: flex-end;
    min-height: 46px;
    padding: 0.5rem 1rem;
    border: none;
    border-radius: var(--mex-ai-chat-radius-button);
    background: var(--mex-ai-chat-primary);
    color: #fff;
    font: inherit;
    font-weight: 600;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    transition: background 0.15s ease, opacity 0.15s ease;
}

.mex-ai-chat__submit:hover:not(:disabled) {
    background: var(--mex-ai-chat-primary-hover);
}

.mex-ai-chat__submit:disabled {
    opacity: 0.55;
    cursor: not-allowed;
}

.mex-ai-chat__submit-icon {
    font-size: 0.86rem;
}

.mex-ai-chat__footnote {
    margin: 0;
    font-size: 11px;
    color: var(--mex-ai-chat-micro);
    line-height: 1.45;
}

.mex-ai-chat__footnote a {
    color: var(--mex-ai-chat-primary);
    text-decoration: none;
}

.mex-ai-chat__footnote a:hover {
    text-decoration: underline;
}

body.ai-chat-open {
    overflow: hidden;
}

@media (max-width: 768px) {
    .mex-ai-chat {
        position: fixed;
        top: auto;
        right: 12px;
        bottom: calc(12px + env(safe-area-inset-bottom, 0px));
        left: auto;
        width: auto;
        max-width: none;
        height: auto;
        transform: none;
        -webkit-text-size-adjust: 100%;
        text-size-adjust: 100%;
    }

    .mex-ai-chat__toggle {
        position: relative;
        z-index: 2;
    }

    .mex-ai-chat__toggle:hover {
        transform: none;
    }

    .mex-ai-chat--open .mex-ai-chat__toggle {
        opacity: 0;
        pointer-events: none;
    }

    .mex-ai-chat__panel {
        position: fixed;
        left: 0;
        right: 0;
        bottom: 0;
        top: auto;
        width: 100%;
        max-width: 100%;
        height: min(88dvh, 720px);
        max-height: min(88dvh, 720px);
        transform: none;
        border-left: none;
        border-right: none;
        border-bottom: none;
        border-radius: 18px 18px 0 0;
        box-shadow: 0 -8px 40px rgba(3, 8, 17, 0.55);
        overflow-x: hidden;
    }

    .mex-ai-chat__messages {
        flex: 1 1 auto;
        min-height: 0;
        max-height: none;
        -webkit-overflow-scrolling: touch;
        overscroll-behavior: contain;
    }

    .mex-ai-chat__message {
        max-width: 88%;
    }

    .mex-ai-chat__form {
        display: grid;
        grid-template-columns: minmax(0, 1fr) auto;
        align-items: end;
        column-gap: 0.5rem;
        row-gap: 0.5rem;
        max-width: 100%;
        overflow-x: hidden;
        padding-bottom: max(10px, env(safe-area-inset-bottom, 0px));
    }

    .mex-ai-chat__label,
    .mex-ai-chat__footnote {
        grid-column: 1 / -1;
    }

    .mex-ai-chat__input,
    .mex-ai-chat__input:focus,
    .mex-ai-chat__input:focus-visible {
        min-height: 46px;
        max-height: 96px;
        resize: none;
        font-size: 16px !important;
        line-height: 1.4 !important;
        transform: none !important;
        width: 100%;
        max-width: 100%;
    }

    .mex-ai-chat__submit {
        align-self: stretch;
        min-width: 84px;
        white-space: nowrap;
    }

    .mex-ai-chat__title {
        font-size: 16px;
    }
}

@media (max-width: 768px) and (max-height: 520px) {
    .mex-ai-chat__panel {
        height: 100dvh;
        max-height: 100dvh;
        border-radius: 0;
    }
}

/* ── Live mód (předání na operátora) ───────────────────────────────────── */

.mex-ai-chat__handoff-row {
    flex-shrink: 0;
    display: flex;
    justify-content: center;
    padding: 0.3rem 0.95rem;
    background: var(--mex-ai-chat-messages);
}

.mex-ai-chat__handoff-row[hidden] {
    display: none;
}

.mex-ai-chat__handoff {
    appearance: none;
    border: 1px dashed rgba(255, 255, 255, 0.25);
    background: transparent;
    color: var(--mex-ai-chat-muted);
    font-size: 0.8rem;
    padding: 0.3rem 0.8rem;
    border-radius: 999px;
    cursor: pointer;
    transition: color 0.15s ease, border-color 0.15s ease;
}

.mex-ai-chat__handoff:hover {
    color: #fff;
    border-color: var(--mex-ai-chat-primary);
}

.mex-ai-chat__row--operator {
    justify-content: flex-start;
}

.mex-ai-chat__message--operator {
    color: #e9f1ff;
    background: var(--mex-ai-chat-assistant);
    border: 1px solid var(--mex-ai-chat-assistant-border);
    border-radius: 12px 12px 12px 4px;
}

.mex-ai-chat__avatar--operator {
    background: #16a34a;
}

.mex-ai-chat__toggle--unread::after {
    content: "";
    position: absolute;
    top: 6px;
    right: 6px;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: #ef4444;
    border: 2px solid #fff;
}

.mex-ai-chat__fallback {
    display: flex;
    flex-direction: column;
    gap: 0.55rem;
}

.mex-ai-chat__contact {
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
}

.mex-ai-chat__contact input {
    padding: 0.45rem 0.6rem;
    font-size: 0.875rem;
    border-radius: 8px;
    border: 1px solid rgba(255, 255, 255, 0.2);
    background: rgba(255, 255, 255, 0.06);
    color: #fff;
}

.mex-ai-chat__contact button {
    appearance: none;
    border: 0;
    border-radius: 8px;
    padding: 0.45rem 0.8rem;
    font-size: 0.875rem;
    font-weight: 600;
    background: var(--mex-ai-chat-primary);
    color: #fff;
    cursor: pointer;
}

.mex-ai-chat__contact button:disabled {
    opacity: 0.6;
    cursor: default;
}

.mex-ai-chat__whatsapp {
    display: inline-block;
    align-self: flex-start;
    padding: 0.45rem 0.8rem;
    border-radius: 8px;
    font-size: 0.875rem;
    font-weight: 600;
    background: #25d366;
    color: #053b1a !important;
    text-decoration: none;
}