/* Chatbox modal styling */
.chat-modal .modal-content.chat-content {
    width: 360px;
    max-width: 90%;
    /* Responsive height - đảm bảo header luôn hiển thị */
    height: auto;
    max-height: 80vh;
    min-height: 400px;
    background-image: url('../img/chatbox.jpg?v=2');
    background-size: cover;
    background-color: transparent;
    border-radius: 16px;
    overflow: hidden;
    box-shadow: 0 8px 24px rgba(0,0,0,0.2);
    /* Remove inherited padding so header sits flush */
    padding: 0;
}
.chat-modal {
    background: rgba(0,0,0,0.5);
    backdrop-filter: blur(4px);
}
.chat-content {
    display: flex;
    flex-direction: column;
    position: relative;  /* enable absolute positioning for emoji picker */
    background: transparent;
}

/* Message container styling */
#chatMessages {
    flex: 1;
    overflow-y: auto;
    padding: 16px;
    display: flex;
    flex-direction: column;
    gap: 8px;
    max-height: calc(80vh - 160px);
}

/* Ensure message styling is consistent */
#chatMessages .message {
    display: flex;
    margin-bottom: 8px;
    max-width: 100%;
}

#chatMessages .message.sent {
    justify-content: flex-end;
}

#chatMessages .message.received {
    justify-content: flex-start;
}

#chatMessages .message .message-bubble {
    max-width: 75%;
    padding: 8px 12px;
    border-radius: 18px;
    position: relative;
    word-wrap: break-word;
}

#chatMessages .message.sent .message-bubble {
    background: #FFB6C1 !important;
    color: #333;
    border-bottom-right-radius: 4px;
    margin-left: auto;
}

#chatMessages .message.received .message-bubble {
    background: #E1BEE7 !important;
    color: #333;
    border-bottom-left-radius: 4px;
    margin-right: auto;
}

/* REMOVED: Old specific user styling - now using universal approach */

/* UNIVERSAL: Styling for ALL users - Two-side chat design */

/* Messages from OTHER users - LEFT SIDE, PINK THEME */
.user-other,
#chatMessages .message.user-other,
#chatMessages .message.received {
    justify-content: flex-start !important;
    display: flex !important;
    margin-bottom: 12px !important;
    width: 100% !important;
}

#chatMessages .message.user-other .message-bubble,
#chatMessages .message.received .message-bubble {
    background: linear-gradient(135deg, #FFE4E1, #FFF0F5) !important;
    color: #8B4B8C !important;
    border: 2px solid #FFB6C1 !important;
    border-bottom-left-radius: 4px !important;
    border-bottom-right-radius: 18px !important;
    margin-right: auto !important;
    margin-left: 0 !important;
    box-shadow: 0 2px 8px rgba(255, 182, 193, 0.3) !important;
    max-width: 75% !important;
    padding: 8px 12px !important;
    border-radius: 18px !important;
    position: relative !important;
    word-wrap: break-word !important;
}

#chatMessages .message.user-other .sender-name,
#chatMessages .message.received .sender-name {
    color: #D63384 !important;
    font-weight: 700 !important;
    font-size: 13px !important;
    margin-bottom: 4px !important;
}

#chatMessages .message.user-other .message-text,
#chatMessages .message.received .message-text {
    color: #8B4B8C !important;
    font-weight: 500 !important;
    font-size: 14px !important;
    line-height: 1.4 !important;
    margin-bottom: 4px !important;
}

#chatMessages .message.user-other .message-time,
#chatMessages .message.received .message-time {
    color: #D63384 !important;
    opacity: 0.8 !important;
    text-align: left !important;
    font-size: 10px !important;
}

/* Messages from ME - RIGHT SIDE, GREEN THEME */
.user-me,
#chatMessages .message.user-me,
#chatMessages .message.sent {
    justify-content: flex-end !important;
    display: flex !important;
    margin-bottom: 12px !important;
    width: 100% !important;
}

#chatMessages .message.user-me .message-bubble,
#chatMessages .message.sent .message-bubble {
    background: linear-gradient(135deg, #E8F5E8, #F0FFF0) !important;
    color: #2E7D32 !important;
    border: 2px solid #81C784 !important;
    border-bottom-right-radius: 4px !important;
    border-bottom-left-radius: 18px !important;
    margin-left: auto !important;
    margin-right: 0 !important;
    box-shadow: 0 2px 8px rgba(129, 199, 132, 0.3) !important;
    max-width: 75% !important;
    padding: 8px 12px !important;
    border-radius: 18px !important;
    position: relative !important;
    word-wrap: break-word !important;
}

#chatMessages .message.user-me .sender-name,
#chatMessages .message.sent .sender-name {
    color: #388E3C !important;
    font-weight: 700 !important;
    font-size: 13px !important;
    margin-bottom: 4px !important;
}

#chatMessages .message.user-me .message-text,
#chatMessages .message.sent .message-text {
    color: #2E7D32 !important;
    font-weight: 500 !important;
    font-size: 14px !important;
    line-height: 1.4 !important;
    margin-bottom: 4px !important;
}

#chatMessages .message.user-me .message-time,
#chatMessages .message.sent .message-time {
    color: #388E3C !important;
    opacity: 0.8 !important;
    text-align: right !important;
    font-size: 10px !important;
}

/* REMOVED: Old specific user overrides - now using universal approach */

/* ENHANCED: Additional user classes for consistency */
#chatMessages .message.user-annhienthu .message-bubble {
    background: linear-gradient(135deg, #FFE4E1, #FFF0F5) !important;
    color: #8B4B8C !important;
    border: 2px solid #FFB6C1;
}

#chatMessages .message.user-maitam .message-bubble {
    background: linear-gradient(135deg, #E8F5E8, #F0FFF0) !important;
    color: #2E7D32 !important;
    border: 2px solid #81C784;
}

/* 🔧 FIX: System messages styling */
#chatMessages .message.system-message {
    justify-content: center !important;
    display: flex !important;
    margin: 16px 0 !important;
    width: 100% !important;
}

#chatMessages .message.system-message .system-message-bubble {
    background: linear-gradient(135deg, #F3E5F5, #FCE4EC) !important;
    color: #7B1FA2 !important;
    border: 1px solid #CE93D8 !important;
    border-radius: 20px !important;
    padding: 8px 16px !important;
    max-width: 80% !important;
    text-align: center !important;
    font-size: 13px !important;
    font-weight: 500 !important;
    box-shadow: 0 2px 4px rgba(123, 31, 162, 0.1) !important;
}

#chatMessages .message.system-message .system-message-text {
    color: #7B1FA2 !important;
    font-weight: 600 !important;
    font-size: 13px !important;
    line-height: 1.3 !important;
    margin-bottom: 4px !important;
}

#chatMessages .message.system-message .system-message-time {
    color: #9C27B0 !important;
    opacity: 0.7 !important;
    font-size: 10px !important;
    font-weight: 400 !important;
    text-align: center !important;
}

/* Default styling for other users */
#chatMessages .message.user-me .message-bubble {
    background: #FFB6C1 !important;
    color: #333 !important;
}

#chatMessages .message.user-other .message-bubble {
    background: #E1BEE7 !important;
    color: #333 !important;
}

/* Sender name and time styling for chat modal */
#chatMessages .message .sender-name {
    font-size: 12px;
    font-weight: 600;
    margin-bottom: 4px;
    color: #666;
    opacity: 0.8;
}

#chatMessages .message .message-time {
    font-size: 11px;
    color: #888;
    margin-top: 4px;
    opacity: 0.7;
}

#chatMessages .message.sent .message-time {
    text-align: right;
}

#chatMessages .message.received .message-time {
    text-align: left;
}

#chatMessages .message .sender-name {
    font-size: 11px;
    font-weight: 600;
    margin-bottom: 4px;
    color: #666;
    opacity: 0.8;
}

#chatMessages .message .message-text {
    font-size: 14px;
    line-height: 1.4;
    margin-bottom: 4px;
}

#chatMessages .message .message-time {
    font-size: 10px;
    color: #666;
    opacity: 0.7;
    text-align: right;
}
.chat-header {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 16px 20px;
    margin: 0;
    background: linear-gradient(135deg, #FFB6C1, #F8BBD0);
    color: #fff;
    font-size: 20px;
    font-weight: bold;
    border-top-left-radius: 20px;
    border-top-right-radius: 20px;
}
.chat-avatar {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    object-fit: cover;
}
.chat-title {
    font-size: 18px;
    font-weight: bold;
    color: #fff;
    margin-left: 12px;
}
.chat-messages {
    flex: 1;
    overflow-y: auto;
    /* Remove white translucent background and borders */
    background: transparent;
    border-radius: 0;
    padding: 16px;
    display: flex;
    flex-direction: column;
    gap: 12px;
}
.chat-message {
    max-width: 75%;
    padding: 12px;
    border-radius: 12px;
    position: relative;
}
.chat-message.incoming {
    align-self: flex-start;
    background: #C8E6C9; /* pastel green */
    padding: 12px;
    border-radius: 16px;
    margin: 8px 0;
    color: #333;
}
.chat-message.outgoing {
    align-self: flex-end;
    background: #FFCDD2; /* pastel pink */
    padding: 12px;
    border-radius: 16px;
    margin: 8px 0;
    color: #333;
}
/* Bubble tail pointers */
.chat-message.incoming::before {
    content: '';
    position: absolute;
    top: 12px;
    left: -8px;
    width: 0;
    height: 0;
    border: 8px solid transparent;
    border-right-color: #C8E6C9;
}
.chat-message.outgoing::after {
    content: '';
    position: absolute;
    top: 12px;
    right: -8px;
    width: 0;
    height: 0;
    border: 8px solid transparent;
    border-left-color: #FFCDD2;
}
.chat-input {
    flex: 0 0 80px;
    display: flex;
    gap: 8px;
    padding: 16px;
    /* Remove white translucent background */
    background: transparent;
}
.chat-input textarea {
    flex: 1;
    min-height: 48px;
    border-radius: 24px;
    border: none;
    padding: 12px;
    font-size: 14px;
}
.chat-input button {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: #f8bbd0;
    border: none;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 22px;
    cursor: pointer;
    color: #fff;
}
.message-time {
    display: block;
    font-size: 10px;
    color: #555;
    margin-top: 4px;
    text-align: right;
}
.chat-date-separator {
    align-self: center;
    background: rgba(255,255,255,0.8);
    padding: 4px 12px;
    border-radius: 12px;
    font-size: 12px;
    font-weight: 500;
    color: #555;
    margin: 8px 0;
}
.chat-messages::-webkit-scrollbar {
    width: 6px;
}
.chat-messages::-webkit-scrollbar-track {
    background: transparent;
}
.chat-messages::-webkit-scrollbar-thumb {
    background: rgba(0,0,0,0.2);
    border-radius: 3px;
}
/* Firefox scrollbar */
.chat-messages {
    scrollbar-width: thin;
    scrollbar-color: rgba(0,0,0,0.2) transparent;
}
/* Typing indicator */
.typing-indicator {
    font-size: 12px;
    color: #555;
    padding: 4px 0;
    text-align: center;
    opacity: 0.7;
}
/* Read receipt icon */
.message-check {
    margin-left: 4px;
    font-size: 12px;
    color: #555;
    vertical-align: middle;
}

/* Emoji toggle and picker for chat modal */
.emoji-toggle-chat {
    background: transparent;
    border: none;
    font-size: 20px;
    cursor: pointer;
    color: #555;
    margin-right: 8px;
}

.emoji-picker-chat {
    position: absolute;
    bottom: 70px;
    left: 20px;
    background: #fff;
    border: 1px solid #ddd;
    border-radius: 12px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    padding: 8px;
    display: none;
    z-index: 1000;
    grid-template-columns: repeat(6, 1fr);
    gap: 6px;
    max-height: 180px;
    overflow-y: auto;
}

.emoji-picker-chat.active {
    display: grid;
}

.emoji-item {
    font-size: 20px;
    cursor: pointer;
    text-align: center;
    user-select: none;
}

.emoji-item:hover {
    transform: scale(1.2);
}

/* Chat header back button */
.back-button {
    padding: 8px;
    background: transparent;
    color: #fff;
    box-shadow: none;
    transition: transform 0.1s;
}

.back-button:hover {
    transform: translateX(-2px);
}

/* Ensure chat-header uses flex layout */
.chat-header {
    display: flex;
    align-items: center;
}

/* Round bottom corners for input area */
.chat-input {
    border-bottom-left-radius: 20px;
    border-bottom-right-radius: 20px;
}

/* Responsive design cho chat modal */
/* Desktop: để lại nhiều không gian cho header */
@media (min-width: 1024px) {
    .chat-modal .modal-content.chat-content {
        max-height: 75vh;
        min-height: 500px;
    }
}

/* Tablet: cân bằng giữa không gian và UX */
@media (min-width: 768px) and (max-width: 1023px) {
    .chat-modal .modal-content.chat-content {
        max-height: 80vh;
        min-height: 450px;
    }
}

/* Mobile landscape: tối ưu cho màn hình ngang */
@media (max-width: 767px) and (orientation: landscape) {
    .chat-modal .modal-content.chat-content {
        max-height: 85vh;
        min-height: 350px;
    }
}

/* Mobile portrait: tối ưu không gian tối đa */
@media (max-width: 767px) and (orientation: portrait) {
    .chat-modal .modal-content.chat-content {
        max-height: 90vh;
        min-height: 400px;
        width: 95%;
    }
}

/* Extra small mobile: điều chỉnh thêm cho màn hình rất nhỏ */
@media (max-width: 480px) {
    .chat-modal .modal-content.chat-content {
        max-height: 92vh;
        min-height: 350px;
        width: 98%;
    }
}

/* Màn hình có chiều cao thấp: ưu tiên không gian */
@media (max-height: 600px) {
    .chat-modal .modal-content.chat-content {
        max-height: 95vh;
        min-height: 300px;
    }

    /* Giảm padding cho chat messages trên màn hình thấp */
    .chat-messages {
        padding: 12px;
    }

    /* Giảm kích thước input area */
    .chat-input {
        flex: 0 0 70px;
        padding: 12px;
    }

    .chat-input textarea {
        min-height: 40px;
    }
}

/* Tối ưu cho màn hình rất thấp */
@media (max-height: 500px) {
    .chat-modal .modal-content.chat-content {
        max-height: 98vh;
        min-height: 280px;
    }

    .chat-header {
        padding: 12px 16px;
    }

    .chat-messages {
        padding: 8px;
        gap: 8px;
    }

    .chat-input {
        flex: 0 0 60px;
        padding: 8px;
    }
}

/* =============================================
   Visual Refresh 2025-08-11 (Non-breaking styles)
   - Pure CSS improvements; no class/DOM changes
   - Preserve all JS selectors and behaviors
   ============================================= */

/* Glass overlay for better contrast on image bg */
.chat-content::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(120% 100% at 50% 0%, rgba(255,255,255,0.72) 0%, rgba(255,255,255,0.42) 60%, rgba(255,255,255,0.22) 100%);
  pointer-events: none;
}

/* Header polish */
.chat-header {
  background: linear-gradient(135deg, #ff8fb3, #f8bcd0 60%, #ffd6e3);
  box-shadow: 0 2px 12px rgba(245, 94, 161, 0.25);
  backdrop-filter: saturate(120%) blur(4px);
}
.chat-title { letter-spacing: 0.2px; }

/* Message list surface for readability */
.chat-messages {
  position: relative;
}
.chat-messages::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: 16px;
  background: linear-gradient(180deg, rgba(255,255,255,0.70), rgba(255,255,255,0.50));
  box-shadow: inset 0 0 1px rgba(255,255,255,0.5);
  pointer-events: none;
}

/* Bubbles: spacing, shadow, animation */
#chatMessages .message { margin-bottom: 10px; }
#chatMessages .message .message-bubble {
  box-shadow: 0 6px 14px rgba(0,0,0,0.06);
  transition: transform .06s ease, box-shadow .2s ease;
  animation: chat-pop .18s ease;
}
#chatMessages .message .message-bubble:hover {
  transform: translateY(-1px);
  box-shadow: 0 8px 18px rgba(0,0,0,0.08);
}

/* Refined palettes (still pink left, green right) */
#chatMessages .message.received .message-bubble,
#chatMessages .message.user-other .message-bubble {
  background: linear-gradient(135deg, #ffe3ee, #fff5fa) !important;
  border-color: #ffb6c1 !important;
}
#chatMessages .message.sent .message-bubble,
#chatMessages .message.user-me .message-bubble {
  background: linear-gradient(135deg, #e9f9ea, #f4fff5) !important;
  border-color: #9ad2a2 !important;
}

/* Avatar next to received messages */
#chatMessages .message .message-avatar {
  width: 28px !important; height: 28px !important;
  border-radius: 50% !important; object-fit: cover !important;
  margin: 2px 8px 0 0 !important; box-shadow: 0 1px 4px rgba(0,0,0,0.12);
}

/* Sender, text, timestamp typography */
#chatMessages .message .sender-name { font-weight: 700; font-size: 12.5px; opacity: .9; }
#chatMessages .message .message-text { font-size: 15px; line-height: 1.5; }
#chatMessages .message .message-time {
  font-size: 11px; opacity: .8; font-variant-numeric: tabular-nums;
}

/* System message polish */
#chatMessages .message.system-message .system-message-bubble {
  background: linear-gradient(135deg, #f7e6ff, #ffe6f3) !important;
  box-shadow: 0 3px 10px rgba(153, 102, 255, 0.12) !important;
}

/* Input area redesign */
.chat-input { gap: 10px; }
.chat-input textarea {
  background: rgba(255,255,255,0.9);
  border: 1px solid rgba(0,0,0,0.06);
  padding: 12px 14px; border-radius: 18px;
  transition: box-shadow .2s ease, border-color .2s ease;
}
.chat-input textarea:focus {
  outline: none; border-color: #f48fb1;
  box-shadow: 0 0 0 3px rgba(244, 143, 177, 0.25);
}
.chat-input button#chatSendBtn {
  background: linear-gradient(135deg, #ff93b3, #f66fb0);
  box-shadow: 0 6px 14px rgba(246, 111, 176, 0.35);
  transition: transform .06s ease, box-shadow .2s ease;
}
.chat-input button#chatSendBtn:hover { transform: translateY(-1px); box-shadow: 0 8px 18px rgba(246,111,176,.45); }
.chat-input button#chatSendBtn:active { transform: translateY(0); }

/* Emoji toggle subtlety */
.emoji-toggle-chat { color: #b85a7d; }
.emoji-picker-chat { border-color: #f4c2d3; box-shadow: 0 8px 20px rgba(0,0,0,0.12); }

/* Typing indicator dots */
.typing-indicator { opacity: .8; color: #b85a7d; }
.typing-indicator::after {
  content: " · · ·"; animation: dots 1s infinite steps(4, end);
}

/* Scrollbar tweak on messages list */
.chat-messages::-webkit-scrollbar-thumb { background: rgba(249, 127, 178, 0.35); }

/* Animations */
@keyframes chat-pop { from{transform: translateY(2px); opacity:.0;} to{transform:none; opacity:1;} }
@keyframes dots { 0%{content:"";} 25%{content:" ·";} 50%{content:" · ·";} 75%{content:" · · ·";} 100%{content:"";} }

/* Mobile tuning */
@media (max-width: 480px) {
  .chat-header { padding: 14px 16px; }
  .chat-title { font-size: 16px; }
  #chatMessages .message .message-bubble { max-width: 82%; }
}


/* --- Layering fix: ensure messages render above overlays (2025-08-15) --- */
.chat-content::before { z-index: 0; }
.chat-header, .chat-messages, .chat-input { position: relative; z-index: 1; }
.chat-messages::before { z-index: 0; }
#chatMessages .message { position: relative; z-index: 1; }


/* --- Visibility fix (2025-08-15): ensure messages render above overlay surface --- */
.chat-messages { position: relative; z-index: 0; }
.chat-messages::before { z-index: 0; }
#chatMessages .message { position: relative; z-index: 1; }
#chatMessages .message .message-bubble { position: relative; z-index: 2; }
/* Ensure visibility when performance mode pauses animations */
body.reduced-motion #chatMessages .message .message-bubble { animation: none !important; opacity: 1 !important; transform: none !important; }
/* Also if document.hidden toggles reduced motion class */
#chatMessages .message .message-bubble { opacity: 1; }
/* Make sure overlay is always behind content */
.chat-content::before { z-index: 0; }
.chat-header, .chat-messages, .chat-input { position: relative; z-index: 1; }

/* Emergency visibility override for Edge on test: remove glass overlays */
.chat-messages::before { display: none !important; }
.chat-content::before { display: none !important; }
/* Force strong contrast for message text */
#chatMessages .message .message-bubble { color: #222 !important; }
#chatMessages .message .sender-name, #chatMessages .message .message-time { color: #b0266b !important; opacity: 1 !important; }