/* ============================================================
   CHAT — chatbot flotante con estética editorial revista
   - FAB inferior, panel lateral que entra desde la izquierda
   - Cabecera tipo masthead, mensajes diferenciados por rol
     (Cormorant para conversación, Space Mono para sistema)
   - Mobile: panel a pantalla completa, FAB centrado abajo
   ============================================================ */

/* ---------- Botón flotante de apertura ---------- */
.chat-fab {
    position: fixed;
    /* Lado derecho del viewport, justo a la izquierda de la columna
       "The Analyst" del hero (que está pegada al marquee). */
    bottom: 1.5rem;
    right: calc(var(--marquee-width) + 16rem);
    z-index: 9500;
    background: var(--noir);
    color: var(--acid-green);
    border: 2px solid var(--noir);
    padding: 0.9rem 1.6rem;
    font-family: var(--font-mono);
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.2em;
    box-shadow: 6px 6px 0 var(--intense-red);
    cursor: pointer;
    transform: rotate(-2deg);
    transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.chat-fab:hover {
    transform: rotate(0deg) translateY(-3px);
    box-shadow: 8px 10px 0 var(--intense-red);
}

.chat-fab .chat-fab-dot {
    display: inline-block;
    width: 8px;
    height: 8px;
    background: var(--acid-green);
    border-radius: 50%;
    margin-right: 0.6rem;
    vertical-align: middle;
    box-shadow: 0 0 8px rgba(196, 255, 14, 0.6);
    animation: chat-pulse 1.6s ease-in-out infinite;
}

@keyframes chat-pulse {
    0%, 100% { opacity: 1;   transform: scale(1); }
    50%      { opacity: 0.4; transform: scale(0.7); }
}

/* ---------- Backdrop ----------
   Capa transparente detrás del panel que captura clicks fuera del
   chat para cerrarlo. Se activa solo cuando el panel está abierto. */
.chat-backdrop {
    position: fixed;
    inset: 0;
    background: rgba(13, 13, 13, 0.35);
    z-index: 9550;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease;
}

.chat-backdrop.open {
    opacity: 1;
    pointer-events: auto;
}

/* ---------- Panel del chat ---------- */
.chat-panel {
    position: fixed;
    top: 0;
    left: 0;
    width: 420px;
    max-width: 100vw;
    height: 100vh;
    background: var(--cream);
    color: var(--noir);
    z-index: 9600;
    display: flex;
    flex-direction: column;
    box-shadow: 12px 0 40px rgba(0, 0, 0, 0.35);
    transform: translateX(-100%);
    transition: transform 0.4s cubic-bezier(0.22, 1, 0.36, 1);
    border-right: 2px solid var(--noir);
}

.chat-panel.open { transform: translateX(0); }

/* Textura de papel para reforzar el aire revista */
.chat-panel::before {
    content: '';
    position: absolute;
    inset: 0;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.8' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%' height='100%' filter='url(%23noise)' opacity='0.5'/%3E%3C/svg%3E");
    opacity: 0.12;
    mix-blend-mode: multiply;
    pointer-events: none;
    z-index: 0;
}

/* ---------- Cabecera del panel ---------- */
.chat-header {
    position: relative;
    z-index: 1;
    /* Reservamos espacio a la derecha para que el botón cerrar no
       pise el texto del meta header ni el título. */
    padding: 1.5rem 4rem 1rem 1.5rem;
    border-bottom: 2px solid var(--noir);
    background: var(--cream);
}

.chat-header-meta {
    display: flex;
    justify-content: space-between;
    font-family: var(--font-mono);
    font-size: 0.65rem;
    letter-spacing: 0.2em;
    color: var(--intense-red);
    margin-bottom: 0.5rem;
    text-transform: uppercase;
}

.chat-header-title {
    font-family: var(--font-display);
    font-size: 2.6rem;
    line-height: 0.9;
    letter-spacing: 0.02em;
    color: var(--noir);
}

.chat-header-title em {
    color: var(--intense-red);
    font-family: var(--font-serif);
    font-style: italic;
    font-weight: 400;
}

.chat-header-subtitle {
    font-family: var(--font-serif);
    font-style: italic;
    font-size: 0.95rem;
    color: var(--charcoal);
    margin-top: 0.4rem;
}

.chat-close {
    position: absolute;
    top: 1.2rem;
    right: 1.2rem;
    background: var(--noir);
    color: var(--cream);
    border: none;
    width: 36px;
    height: 36px;
    font-family: var(--font-mono);
    font-size: 1rem;
    cursor: pointer;
    transition: background 0.2s;
}

.chat-close:hover { background: var(--intense-red); }

/* ---------- Lista de mensajes ---------- */
.chat-messages {
    position: relative;
    z-index: 1;
    flex: 1;
    overflow-y: auto;
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
    scrollbar-width: thin;
    scrollbar-color: var(--noir) transparent;
}

.chat-messages::-webkit-scrollbar { width: 6px; }
.chat-messages::-webkit-scrollbar-thumb {
    background: var(--noir);
    border-radius: 3px;
}

/* Cada mensaje */
.chat-msg {
    max-width: 85%;
    font-family: var(--font-body);
    font-size: 1.05rem;
    line-height: 1.4;
    padding: 0.8rem 1rem;
    position: relative;
    animation: chat-msg-in 0.35s cubic-bezier(0.22, 1, 0.36, 1) both;
}

@keyframes chat-msg-in {
    from { opacity: 0; transform: translateY(8px); }
    to   { opacity: 1; transform: translateY(0); }
}

/* Mensaje del bot: papel blanco con cinta y borde fino */
.chat-msg.bot {
    align-self: flex-start;
    background: #fff;
    border: 1px solid rgba(13, 13, 13, 0.08);
    box-shadow: 4px 4px 0 var(--noir);
}

.chat-msg.bot::before {
    content: '';
    position: absolute;
    top: -8px;
    left: 1.2rem;
    width: 36px;
    height: 12px;
    background: rgba(220, 210, 185, 0.6);
    transform: rotate(-3deg);
}

/* Mensaje del usuario: bloque negro con verde ácido */
.chat-msg.user {
    align-self: flex-end;
    background: var(--noir);
    color: var(--cream);
    box-shadow: -4px 4px 0 var(--acid-green);
}

/* Mensaje del sistema (timestamps, "escribiendo...") */
.chat-msg.system {
    align-self: center;
    background: transparent;
    font-family: var(--font-mono);
    font-size: 0.7rem;
    color: var(--charcoal);
    letter-spacing: 0.15em;
    text-transform: uppercase;
    padding: 0.3rem 0.6rem;
    box-shadow: none;
}

.chat-msg-role {
    display: block;
    font-family: var(--font-mono);
    font-size: 0.6rem;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    margin-bottom: 0.3rem;
}

.chat-msg.bot  .chat-msg-role { color: var(--intense-red); }
.chat-msg.user .chat-msg-role { color: var(--acid-green); }

/* Indicador "escribiendo..." con tres puntos animados */
.chat-typing {
    display: inline-flex;
    gap: 4px;
    align-items: center;
    margin-left: 0.5rem;
}

.chat-typing span {
    width: 6px;
    height: 6px;
    background: currentColor;
    border-radius: 50%;
    opacity: 0.4;
    animation: chat-typing 1s infinite;
}

.chat-typing span:nth-child(2) { animation-delay: 0.15s; }
.chat-typing span:nth-child(3) { animation-delay: 0.3s; }

@keyframes chat-typing {
    0%, 100% { opacity: 0.3; transform: translateY(0); }
    50%      { opacity: 1;   transform: translateY(-3px); }
}

/* ---------- Footer / input ---------- */
.chat-input-bar {
    position: relative;
    z-index: 1;
    border-top: 2px solid var(--noir);
    background: var(--cream);
    padding: 1rem;
    display: flex;
    gap: 0.6rem;
    align-items: flex-end;
}

.chat-input {
    flex: 1;
    background: #fff;
    border: 1px solid rgba(13, 13, 13, 0.15);
    padding: 0.7rem 0.9rem;
    font-family: var(--font-body);
    font-size: 1rem;
    color: var(--noir);
    resize: none;
    min-height: 42px;
    max-height: 120px;
    line-height: 1.3;
    outline: none;
    transition: border-color 0.2s;
}

.chat-input:focus { border-color: var(--noir); }

.chat-send {
    background: var(--intense-red);
    color: var(--cream);
    border: none;
    padding: 0 1.1rem;
    font-family: var(--font-mono);
    font-size: 0.8rem;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    cursor: pointer;
    height: 42px;
    transition: background 0.2s, color 0.2s;
}

.chat-send:hover {
    background: var(--noir);
    color: var(--acid-green);
}

.chat-send:disabled {
    opacity: 0.4;
    cursor: not-allowed;
    background: var(--charcoal);
}

/* Pie con tagline tipo magazine */
.chat-footer {
    position: relative;
    z-index: 1;
    padding: 0.5rem 1rem;
    border-top: 1px solid rgba(13, 13, 13, 0.1);
    background: var(--cream);
    font-family: var(--font-mono);
    font-size: 0.6rem;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--charcoal);
    text-align: center;
}

/* ---------- Móvil: panel a pantalla completa ---------- */
@media (max-width: 768px),
       (max-width: 1024px) and (orientation: portrait) {
    .chat-panel { width: 100vw; }

    /* En móvil el FAB pasa a pastilla pequeña centrada en el footer */
    .chat-fab {
        bottom: 1rem;
        right: auto;
        left: 50%;
        transform: translateX(-50%) rotate(-2deg);
        padding: 0.55rem 1.2rem;
        font-size: 0.75rem;
        letter-spacing: 0.18em;
        box-shadow: 3px 3px 0 var(--intense-red);
    }

    .chat-fab:hover {
        transform: translateX(-50%) rotate(0deg) translateY(-2px);
        box-shadow: 4px 5px 0 var(--intense-red);
    }

    .chat-fab .chat-fab-dot {
        width: 6px;
        height: 6px;
        margin-right: 0.45rem;
    }

    .chat-header-title { font-size: 2rem; }

    /* iOS Safari hace zoom automático al focar inputs con font-size < 16px.
       Forzamos 16px aunque rompa un poco la jerarquía tipográfica móvil. */
    .chat-input { font-size: 16px; }
}