/* ============================================
   AI CHAT WIDGET — Premium Redesign v2
   Tông màu brand: Navy #1544b7 & Sky #2a83e9
   ============================================ */

/* ── Widget Root ── */
#ai-chat-widget {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    z-index: 9999;
    font-family: "Inter", system-ui, sans-serif;
}

/* ── Toggle Button ── */
.ai-chat-btn {
    position: relative;
    width: 58px;
    height: 58px;
    border-radius: 50%;
    background: linear-gradient(135deg, #1544b7 0%, #2a83e9 100%);
    color: #fff;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 1.5rem;
    cursor: pointer;
    box-shadow:
        0 4px 15px rgba(21, 68, 183, 0.35),
        0 0 0 0 rgba(42, 131, 233, 0.4);
    transition: transform 0.25s ease, box-shadow 0.25s ease;
    animation: ai-pulse 3s ease-in-out infinite;
    border: 2px solid rgba(255, 255, 255, 0.2);
}
.ai-chat-btn:hover {
    transform: scale(1.08) translateY(-2px);
    box-shadow:
        0 8px 25px rgba(21, 68, 183, 0.45),
        0 0 0 6px rgba(42, 131, 233, 0.15);
    animation: none;
}
@keyframes ai-pulse {
    0%, 100% { box-shadow: 0 4px 15px rgba(21,68,183,.35), 0 0 0 0 rgba(42,131,233,.4); }
    70%       { box-shadow: 0 4px 15px rgba(21,68,183,.35), 0 0 0 10px rgba(42,131,233,0); }
}

/* Unread badge */
.ai-chat-btn .ai-badge {
    position: absolute;
    top: -3px;
    right: -3px;
    width: 16px;
    height: 16px;
    background: #ff9800;
    border-radius: 50%;
    border: 2px solid #fff;
    font-size: 9px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
}

/* ── Chat Box Shell ── */
.ai-chat-box {
    position: absolute;
    bottom: 70px;
    right: 0;
    width: 420px;
    height: 420px;
    background: #fff;
    border-radius: 20px;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    transform-origin: bottom right;
    transition: transform 0.35s cubic-bezier(0.175, 0.885, 0.32, 1.275), opacity 0.25s ease;
    opacity: 0;
    transform: scale(0.6) translateY(20px);
    pointer-events: none;

    /* Multi-layer shadow for depth */
    box-shadow:
        0 2px 8px rgba(21,68,183,0.06),
        0 8px 24px rgba(21,68,183,0.10),
        0 24px 56px rgba(21,68,183,0.14),
        0 0 0 1px rgba(21,68,183,0.07);
}
.ai-chat-box.open {
    opacity: 1;
    transform: scale(1) translateY(0);
    pointer-events: auto;
}

/* ── Header ── */
.ai-chat-header {
    background: linear-gradient(135deg, #1544b7 0%, #2a83e9 100%);
    padding: 1rem 1.25rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    flex-shrink: 0;
    position: relative;
    overflow: hidden;
}
/* Decorative glow blob in header */
.ai-chat-header::before {
    content: '';
    position: absolute;
    top: -30px;
    right: -20px;
    width: 100px;
    height: 100px;
    background: rgba(255,255,255,0.08);
    border-radius: 50%;
    pointer-events: none;
}
.ai-chat-header::after {
    content: '';
    position: absolute;
    bottom: -15px;
    left: 60px;
    width: 60px;
    height: 60px;
    background: rgba(255,152,0,0.15);
    border-radius: 50%;
    pointer-events: none;
}

/* Avatar */
.ai-chat-avatar {
    width: 38px;
    height: 38px;
    border-radius: 50%;
    background: rgba(255,255,255,0.18);
    border: 1.5px solid rgba(255,255,255,0.3);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    color: #fff;
    flex-shrink: 0;
    backdrop-filter: blur(4px);
}

.ai-chat-header-info {
    flex: 1;
}
.ai-chat-header h3 {
    margin: 0;
    font-size: 0.95rem;
    font-weight: 700;
    color: #fff;
    letter-spacing: 0.01em;
}
.ai-chat-header .ai-status {
    display: flex;
    align-items: center;
    gap: 0.3rem;
    margin-top: 2px;
    font-size: 0.72rem;
    color: rgba(255,255,255,0.75);
}
.ai-chat-header .ai-status-dot {
    width: 6px;
    height: 6px;
    background: #4ade80;
    border-radius: 50%;
    box-shadow: 0 0 6px #4ade80;
    animation: blink 2s ease-in-out infinite;
}
@keyframes blink {
    0%,100% { opacity: 1; }
    50%      { opacity: 0.4; }
}

#aiChatClose {
    background: rgba(255,255,255,0.12);
    border: 1px solid rgba(255,255,255,0.2);
    color: rgba(255,255,255,0.8);
    width: 30px;
    height: 30px;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.9rem;
    transition: background 0.2s, color 0.2s;
    flex-shrink: 0;
}
#aiChatClose:hover {
    background: rgba(255,255,255,0.25);
    color: #fff;
}

/* ── Messages Body ── */
.ai-chat-body {
    flex: 1;
    padding: 1.25rem 1rem;
    overflow-y: auto;
    background: #f7f8fa;
    display: flex;
    flex-direction: column;
    gap: 0.9rem;
    scroll-behavior: smooth;
}
.ai-chat-body::-webkit-scrollbar {
    width: 4px;
}
.ai-chat-body::-webkit-scrollbar-track {
    background: transparent;
}
.ai-chat-body::-webkit-scrollbar-thumb {
    background: #cdd2db;
    border-radius: 2px;
}
.ai-chat-body::-webkit-scrollbar-thumb:hover {
    background: #b0b8c4;
}

/* ── Message Bubbles ── */
.ai-msg-row {
    display: flex;
    align-items: flex-end;
    gap: 0.5rem;
    animation: msg-in 0.3s cubic-bezier(0.34, 1.56, 0.64, 1) both;
}
@keyframes msg-in {
    from { opacity: 0; transform: translateY(10px) scale(0.95); }
    to   { opacity: 1; transform: translateY(0) scale(1); }
}

.ai-msg-row.user {
    flex-direction: row-reverse;
}

.ai-msg-avatar-small {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.75rem;
    flex-shrink: 0;
}
.ai-msg-row.bot .ai-msg-avatar-small {
    background: linear-gradient(135deg, #1544b7, #2a83e9);
    color: #fff;
}
.ai-msg-row.user .ai-msg-avatar-small {
    background: #e3e6ec;
    color: #4a5568;
}

.ai-msg {
    max-width: 78%;
    padding: 0.7rem 0.95rem;
    border-radius: 16px;
    font-size: 0.875rem;
    line-height: 1.5;
    word-break: break-word;
}
.ai-msg.bot {
    background: #fff;
    color: #1a202c;
    border-bottom-left-radius: 4px;
    box-shadow: 0 2px 8px rgba(21,68,183,0.07);
    border: 1px solid rgba(21,68,183,0.06);
}
.ai-msg.user {
    background: linear-gradient(135deg, #1544b7 0%, #2a83e9 100%);
    color: #fff;
    border-bottom-right-radius: 4px;
    box-shadow: 0 4px 14px rgba(21,68,183,0.25);
}

/* ── Thinking / Status Indicator ── */
.ai-thinking-row {
    display: none;
    align-items: flex-end;
    gap: 0.5rem;
    animation: msg-in 0.3s ease both;
}
.ai-thinking-row.active { display: flex; }

.ai-thinking-bubble {
    background: #fff;
    padding: 0.65rem 1rem;
    border-radius: 16px;
    border-bottom-left-radius: 4px;
    box-shadow: 0 2px 8px rgba(21,68,183,0.07);
    border: 1px solid rgba(21,68,183,0.06);
    display: flex;
    align-items: center;
    gap: 0.55rem;
    min-width: 170px;
}

/* Spinning ring icon */
.ai-thinking-icon {
    width: 16px;
    height: 16px;
    border: 2px solid #e3e6ec;
    border-top-color: #2a83e9;
    border-radius: 50%;
    animation: ai-spin 0.8s linear infinite;
    flex-shrink: 0;
}
@keyframes ai-spin {
    to { transform: rotate(360deg); }
}

/* Stage text */
.ai-thinking-text {
    font-size: 0.8rem;
    font-weight: 500;
    color: #667080;
    white-space: nowrap;
    overflow: hidden;
}

/* Animated gradient shimmer on text */
.ai-thinking-text span {
    display: inline-block;
    background: linear-gradient(90deg, #667080 0%, #2a83e9 50%, #667080 100%);
    background-size: 200% auto;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: ai-shimmer 1.8s linear infinite;
}
@keyframes ai-shimmer {
    from { background-position: 200% center; }
    to   { background-position: 0% center; }
}

/* Back-compat: hide old typing row if exists */
.ai-typing-row { display: none !important; }

/* ── Product Slider — simple horizontal scroll ── */
.ai-product-slider {
    position: relative;
    margin-top: 0.5rem;
    padding: 0 28px;
}

/* Clip window: hides overflow so only 2 cards are visible */
.ai-carousel-window {
    overflow: hidden;
    border-radius: 4px;
}

.ai-product-carousel {
    display: flex;
    gap: 0.6rem;
    padding: 0.5rem 0.1rem 0.75rem;
    align-items: flex-start;
    transition: transform 0.35s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    will-change: transform;
}

/* Individual card */
.ai-product-card {
    width: 140px;
    min-width: 140px;
    background: #fff;
    border: 1px solid rgba(21,68,183,0.09);
    border-radius: 12px;
    padding: 0.7rem;
    flex-shrink: 0;
    box-shadow: 0 2px 8px rgba(21,68,183,0.07);
    display: flex;
    flex-direction: column;
    gap: 0.3rem;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
    cursor: pointer;
}
.ai-product-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 22px rgba(21,68,183,0.15);
}
.ai-product-card img {
    width: 100%;
    height: 88px;
    object-fit: contain;
    border-radius: 8px;
    background: #f7f8fa;
    padding: 4px;
}
.ai-product-card .p-cat {
    font-size: 0.62rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: #2a83e9;
    font-weight: 700;
}
.ai-product-card .p-name {
    font-size: 0.73rem;
    font-weight: 600;
    color: #1a202c;
    line-height: 1.35;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}
.ai-product-card .p-price {
    font-size: 0.8rem;
    color: #1544b7;
    font-weight: 700;
}
.ai-product-card .p-price.sale { color: #ef4444; }
.ai-product-card .add-cart-btn {
    margin-top: auto;
    width: 100%;
    padding: 0.4rem 0;
    background: linear-gradient(135deg, #1544b7, #2a83e9);
    border: none;
    border-radius: 8px;
    font-size: 0.7rem;
    font-weight: 700;
    color: #fff;
    cursor: pointer;
    transition: opacity 0.2s, transform 0.15s;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 4px;
}
.ai-product-card .add-cart-btn:hover  { opacity: 0.88; transform: scale(0.98); }
.ai-product-card .add-cart-btn:active { transform: scale(0.95); }

/* Prev / Next arrow buttons */
.ai-slider-btn {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 26px;
    height: 26px;
    border-radius: 50%;
    background: #fff;
    border: 1.5px solid #e3e6ec;
    box-shadow: 0 2px 8px rgba(21,68,183,0.12);
    color: #1544b7;
    font-size: 0.7rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.2s, color 0.2s, opacity 0.2s;
    z-index: 10;
}
.ai-slider-btn:hover {
    background: #1544b7;
    color: #fff;
    border-color: #1544b7;
}
.ai-slider-btn.disabled {
    opacity: 0.3;
    pointer-events: none;
}
.ai-slider-btn.prev { left: 0; }
.ai-slider-btn.next { right: 0; }

/* Dot indicators */
.ai-slider-dots {
    display: flex;
    justify-content: center;
    gap: 5px;
    margin-top: 0.4rem;
    padding-bottom: 0.25rem;
}
.ai-slider-dot {
    width: 5px;
    height: 5px;
    border-radius: 50%;
    background: #cdd2db;
    cursor: pointer;
    transition: background 0.2s, transform 0.2s;
}
.ai-slider-dot.active {
    background: #2a83e9;
    transform: scale(1.3);
}

/* ── Input Bar ── */
.ai-chat-input {
    display: flex;
    align-items: center;
    padding: 0.85rem 1rem;
    border-top: 1px solid #e3e6ec;
    background: #fff;
    gap: 0.6rem;
    flex-shrink: 0;
}
.ai-chat-input input {
    flex: 1;
    padding: 0.65rem 1rem;
    border: 1.5px solid #e3e6ec;
    border-radius: 22px;
    outline: none;
    font-size: 0.875rem;
    background: #f7f8fa;
    color: #1a202c;
    transition: border-color 0.2s, background 0.2s;
    font-family: inherit;
}
.ai-chat-input input:focus {
    border-color: #2a83e9;
    background: #fff;
    box-shadow: 0 0 0 3px rgba(42,131,233,0.1);
}
.ai-chat-input input::placeholder {
    color: #b0b8c4;
}
.ai-chat-input button {
    width: 38px;
    height: 38px;
    border-radius: 50%;
    border: none;
    background: linear-gradient(135deg, #1544b7, #2a83e9);
    color: #fff;
    font-size: 0.95rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: transform 0.2s, opacity 0.2s;
    box-shadow: 0 3px 10px rgba(21,68,183,0.25);
    flex-shrink: 0;
}
.ai-chat-input button:hover {
    opacity: 0.9;
    transform: scale(1.05);
}
.ai-chat-input button:active {
    transform: scale(0.93);
}

/* ── Date Divider ── */
.ai-date-sep {
    text-align: center;
    font-size: 0.7rem;
    color: #b0b8c4;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}
.ai-date-sep::before,
.ai-date-sep::after {
    content: '';
    flex: 1;
    height: 1px;
    background: #e3e6ec;
}

/* ── Quick Action Chips ── */
.ai-chips {
    display: flex;
    gap: 0.4rem;
    flex-wrap: wrap;
    margin-top: -0.25rem;
}
.ai-chip {
    padding: 0.3rem 0.8rem;
    border-radius: 999px;
    background: #eef4fd;
    color: #1544b7;
    font-size: 0.75rem;
    font-weight: 600;
    border: 1px solid rgba(21,68,183,0.12);
    cursor: pointer;
    transition: background 0.2s, color 0.2s;
    white-space: nowrap;
}
.ai-chip:hover {
    background: #1544b7;
    color: #fff;
    border-color: #1544b7;
}

/* ── Responsive ── */
@media (max-width: 480px) {
    .ai-chat-box {
        width: calc(100vw - 1.5rem);
        right: -0.5rem;
        height: 85dvh;
        border-radius: 20px 20px 0 0;
        bottom: 70px;
    }
    #ai-chat-widget {
        right: 1rem;
    }
}