/* ── Derecho Parciales · Styles · WhatsApp Light ── */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600&display=swap');

:root {
    --dp-bg:           #e5ddd5;   /* WhatsApp chat background (warm beige pattern) */
    --dp-surface:      #ffffff;
    --dp-header:       #075e54;   /* WhatsApp dark green */
    --dp-header2:      #128c7e;
    --dp-send-btn:     #25d366;   /* WhatsApp green */
    --dp-bot-bubble:   #ffffff;
    --dp-user-bubble:  #dcf8c6;   /* WhatsApp sent message green */
    --dp-text:         #111b21;
    --dp-muted:        #667781;
    --dp-border:       #d1d7db;
    --dp-tick:         #53bdeb;
    --dp-success:      #25d366;
    --dp-error:        #e53935;
    --dp-info:         #075e54;
    --dp-radius:       8px;
    --dp-font:         'Inter', 'Segoe UI', sans-serif;
    --dp-input-bg:     #f0f2f5;
    --dp-timestamp:    #8696a0;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

#dp-wrapper {
    font-family: var(--dp-font);
    background: var(--dp-bg);
    background-image: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23c8bdb0' fill-opacity='0.18'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
    border-radius: 12px;
    max-width: 680px;
    margin: 1.5rem auto;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    box-shadow: 0 4px 24px rgba(0,0,0,.18);
    height: 680px;
    border: 1px solid #c8bdb0;
}

/* ── Header ── */
#dp-header {
    background: linear-gradient(90deg, var(--dp-header) 0%, var(--dp-header2) 100%);
    padding: 10px 16px;
    display: flex;
    align-items: center;
    gap: 12px;
    flex-shrink: 0;
}

#dp-avatar {
    width: 42px; height: 42px;
    background: rgba(255,255,255,.2);
    border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
    font-size: 20px;
    flex-shrink: 0;
    border: 2px solid rgba(255,255,255,.3);
}

#dp-title {
    font-size: .97rem;
    font-weight: 600;
    color: #ffffff;
    letter-spacing: .1px;
}

#dp-subtitle {
    font-size: .73rem;
    color: rgba(255,255,255,.78);
    margin-top: 1px;
}

#dp-status {
    margin-left: auto;
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: 3px;
}

.dp-dot {
    width: 9px; height: 9px;
    background: var(--dp-send-btn);
    border-radius: 50%;
    display: inline-block;
    animation: dp-pulse 2s infinite;
    box-shadow: 0 0 0 2px rgba(37,211,102,.3);
}

@keyframes dp-pulse {
    0%,100% { opacity:1; }
    50%      { opacity:.5; }
}

/* ── Messages area ── */
#dp-messages {
    flex: 1;
    overflow-y: auto;
    padding: 12px 16px;
    display: flex;
    flex-direction: column;
    gap: 3px;
    scroll-behavior: smooth;
}

#dp-messages::-webkit-scrollbar { width: 5px; }
#dp-messages::-webkit-scrollbar-track { background: transparent; }
#dp-messages::-webkit-scrollbar-thumb { background: rgba(0,0,0,.2); border-radius: 4px; }

/* ── Date separator ── */
.dp-date-sep {
    text-align: center;
    margin: 8px 0;
}
.dp-date-sep span {
    background: rgba(255,255,255,.85);
    color: var(--dp-muted);
    font-size: .72rem;
    padding: 4px 10px;
    border-radius: 8px;
    box-shadow: 0 1px 2px rgba(0,0,0,.1);
}

/* ── Message rows ── */
.dp-msg {
    display: flex;
    flex-direction: column;
    max-width: 72%;
    animation: dp-fadein .2s ease both;
}

@keyframes dp-fadein {
    from { opacity:0; transform:translateY(4px); }
    to   { opacity:1; transform:translateY(0); }
}

.dp-msg.bot  { align-self: flex-start; }
.dp-msg.user { align-self: flex-end;   }

/* ── Bubbles ── */
.dp-bubble {
    padding: 7px 10px 6px;
    border-radius: var(--dp-radius);
    font-size: .875rem;
    line-height: 1.55;
    color: var(--dp-text);
    position: relative;
    box-shadow: 0 1px 2px rgba(0,0,0,.12);
    word-break: break-word;
}

.dp-msg.bot .dp-bubble {
    background: var(--dp-bot-bubble);
    border-top-left-radius: 2px;
}

.dp-msg.user .dp-bubble {
    background: var(--dp-user-bubble);
    border-top-right-radius: 2px;
}

/* Tail triangles */
.dp-msg.bot .dp-bubble::before {
    content: '';
    position: absolute;
    top: 0; left: -8px;
    border-width: 0 9px 9px 0;
    border-style: solid;
    border-color: transparent var(--dp-bot-bubble) transparent transparent;
}

.dp-msg.user .dp-bubble::after {
    content: '';
    position: absolute;
    top: 0; right: -8px;
    border-width: 0 0 9px 9px;
    border-style: solid;
    border-color: transparent transparent transparent var(--dp-user-bubble);
}

/* Timestamp */
.dp-time {
    font-size: .68rem;
    color: var(--dp-timestamp);
    margin-top: 2px;
    display: flex;
    align-items: center;
    gap: 3px;
}
.dp-msg.user .dp-time { justify-content: flex-end; }
.dp-msg.bot  .dp-time { justify-content: flex-start; }

/* Sender name (bot) */
.dp-sender {
    font-size: .73rem;
    font-weight: 600;
    color: var(--dp-info);
    margin-bottom: 2px;
    padding-left: 2px;
}

/* Citation badge */
.dp-cite {
    display: inline-block;
    background: #e8f5e9;
    border-left: 3px solid var(--dp-info);
    color: #1b5e20;
    font-size: .78rem;
    padding: 4px 8px;
    border-radius: 4px;
    margin-top: 6px;
    line-height: 1.4;
}

/* ── Typing indicator ── */
.dp-typing {
    display: flex; gap: 4px; align-items: center; padding: 6px 4px;
}
.dp-typing span {
    width: 7px; height: 7px;
    background: var(--dp-muted);
    border-radius: 50%;
    animation: dp-bounce .8s infinite;
}
.dp-typing span:nth-child(2) { animation-delay: .13s; }
.dp-typing span:nth-child(3) { animation-delay: .26s; }
@keyframes dp-bounce {
    0%,60%,100% { transform: translateY(0); }
    30%          { transform: translateY(-5px); }
}

/* ── Buttons area ── */
#dp-buttons-area {
    padding: 6px 12px 4px;
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    background: rgba(229,221,213,.6);
    border-top: 1px solid var(--dp-border);
}

.dp-btn {
    font-family: var(--dp-font);
    font-size: .8rem;
    font-weight: 500;
    padding: 6px 14px;
    border-radius: 16px;
    border: 1.5px solid var(--dp-header2);
    background: #ffffff;
    color: var(--dp-header);
    cursor: pointer;
    transition: all .15s;
}
.dp-btn:hover {
    background: var(--dp-header2);
    color: #fff;
}
.dp-btn.topic-btn {
    border-color: var(--dp-header);
    color: var(--dp-header);
}
.dp-btn.change-btn {
    border-color: #8696a0;
    color: #667781;
}
.dp-btn.change-btn:hover { background: #8696a0; color:#fff; }

/* ── Input area ── */
#dp-input-area {
    display: flex;
    align-items: flex-end;
    gap: 8px;
    padding: 8px 12px 10px;
    background: var(--dp-input-bg);
    border-top: 1px solid var(--dp-border);
    flex-shrink: 0;
}

#dp-input {
    flex: 1;
    background: #ffffff;
    border: none;
    color: var(--dp-text);
    font-family: var(--dp-font);
    font-size: .9rem;
    padding: 10px 14px;
    border-radius: 22px;
    outline: none;
    resize: none;
    min-height: 42px;
    max-height: 120px;
    line-height: 1.4;
    box-shadow: 0 1px 3px rgba(0,0,0,.1);
}

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

#dp-send {
    width: 44px; height: 44px;
    border-radius: 50%;
    border: none;
    background: var(--dp-header2);
    color: #ffffff;
    font-size: 1.1rem;
    cursor: pointer;
    display: flex; align-items: center; justify-content: center;
    flex-shrink: 0;
    transition: background .15s, transform .15s;
}
#dp-send:hover    { background: var(--dp-header); transform: scale(1.06); }
#dp-send:disabled { background: var(--dp-border); cursor: default; transform: none; }

/* ── System messages ── */
.dp-system {
    align-self: center;
    background: rgba(255,255,255,.82);
    color: var(--dp-muted);
    font-size: .74rem;
    padding: 4px 12px;
    border-radius: 8px;
    box-shadow: 0 1px 2px rgba(0,0,0,.1);
    max-width: 80%;
    text-align: center;
    line-height: 1.4;
}

/* ── Responsive ── */
@media (max-width: 520px) {
    #dp-wrapper { border-radius: 0; height: 100dvh; margin: 0; }
    .dp-msg { max-width: 85%; }
}