/* ===== AI Assistant – Floating Chat Widget ===== */
/* Colors come from the active MudBlazor theme via --mud-palette-* vars, */
/* so the widget matches whichever theme (and light/dark mode) the user picks. */

.ai-assistant {
    position: fixed;
    right: 24px;
    bottom: 24px;
    z-index: 1400;
    font-family: var(--mud-typography-default-family, 'Roboto', 'Segoe UI', sans-serif);
}

/* ---- Floating action button ---- */
.ai-assistant .ai-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 60px;
    height: 60px;
    border: none;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--mud-palette-primary) 0%, var(--mud-palette-primary-darken, var(--mud-palette-primary)) 100%);
    color: var(--mud-palette-primary-text, #fff);
    font-size: 26px;
    line-height: 1;
    cursor: pointer;
    box-shadow: 0 6px 20px rgba(0, 52, 91, 0.35);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}
.ai-assistant .ai-toggle:hover {
    transform: translateY(-2px) scale(1.05);
    box-shadow: 0 10px 26px rgba(0, 52, 91, 0.45);
}
.ai-assistant .ai-toggle:active { transform: scale(0.98); }
.ai-assistant .ai-toggle-icon { pointer-events: none; }

/* ---- Panel ---- */
.ai-assistant .ai-panel {
    position: absolute;
    right: 0;
    bottom: 74px;
    width: 380px;
    max-width: calc(100vw - 32px);
    height: 560px;
    max-height: calc(100vh - 130px);
    flex-direction: column;
    background: var(--mud-palette-surface, #fff);
    color: var(--mud-palette-text-primary, #1a1a1a) !important;
    border: 1px solid var(--mud-palette-lines-default, rgba(0, 0, 0, 0.10));
    border-radius: 16px;
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.28);
    overflow: hidden;
    animation: ai-pop 0.18s ease-out;
}
@keyframes ai-pop {
    from { opacity: 0; transform: translateY(12px) scale(0.98); }
    to   { opacity: 1; transform: translateY(0) scale(1); }
}

/* ---- Header ---- */
.ai-assistant .ai-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 14px 16px;
    background: linear-gradient(135deg, var(--mud-palette-primary) 0%, var(--mud-palette-primary-darken, var(--mud-palette-primary)) 100%);
    color: var(--mud-palette-primary-text, #fff) !important;
    flex-shrink: 0;
}
.ai-assistant .ai-header-info { display: flex; align-items: center; gap: 10px; }
.ai-assistant .ai-avatar {
    width: 38px;
    height: 38px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.18);
    font-size: 20px;
}
.ai-assistant .ai-header-text { display: flex; flex-direction: column; line-height: 1.2; }
.ai-assistant .ai-title { font-weight: 600; font-size: 15px; }
.ai-assistant .ai-subtitle {
    font-size: 11px;
    opacity: 0.9;
    display: flex;
    align-items: center;
    gap: 5px;
}
.ai-assistant .ai-status-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: #4ade80;
    box-shadow: 0 0 0 3px rgba(74, 222, 128, 0.25);
}
.ai-assistant .ai-close {
    background: transparent;
    border: none;
    color: #fff;
    font-size: 16px;
    cursor: pointer;
    opacity: 0.85;
    width: 30px;
    height: 30px;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.15s ease, opacity 0.15s ease;
}
.ai-assistant .ai-close:hover { background: rgba(255, 255, 255, 0.15); opacity: 1; }

/* ---- Messages area ---- */
.ai-assistant .ai-messages {
    flex: 1;
    overflow-y: auto;
    padding: 16px;
    display: flex;
    flex-direction: column;
    gap: 12px;
    background: var(--mud-palette-background-gray, var(--mud-palette-background, #f7f8fa));
}
.ai-assistant .ai-messages::-webkit-scrollbar { width: 8px; }
.ai-assistant .ai-messages::-webkit-scrollbar-thumb {
    background: var(--mud-palette-lines-default, rgba(0, 0, 0, 0.15));
    border-radius: 8px;
}

/* ---- Empty state ---- */
.ai-assistant .ai-empty { margin: auto; text-align: center; padding: 12px; }
.ai-assistant .ai-empty-icon { font-size: 40px; margin-bottom: 8px; }
.ai-assistant .ai-empty-title {
    font-weight: 600;
    font-size: 16px;
    margin: 4px 0;
    color: var(--mud-palette-text-primary, #1a1a1a) !important;
}
.ai-assistant .ai-empty-hint {
    font-size: 13px;
    color: var(--mud-palette-text-secondary, #666) !important;
    margin: 0 0 14px;
}
.ai-assistant .ai-suggestions { display: flex; flex-direction: column; gap: 8px; }
.ai-assistant .ai-chip {
    background: var(--mud-palette-surface, #fff);
    border: 1px solid var(--mud-palette-lines-default, rgba(0, 0, 0, 0.12));
    color: var(--mud-palette-text-primary, #1a1a1a) !important;
    padding: 9px 14px;
    border-radius: 20px;
    font-size: 13px;
    cursor: pointer;
    transition: border-color 0.15s ease, transform 0.1s ease;
}
.ai-assistant .ai-chip:hover { border-color: var(--mud-palette-primary); transform: translateY(-1px); }

/* ---- Message bubbles ---- */
.ai-assistant .ai-msg { display: flex; align-items: flex-end; gap: 8px; max-width: 100%; }
.ai-assistant .ai-msg-user { flex-direction: row-reverse; }
.ai-assistant .ai-msg-avatar {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--mud-palette-primary), var(--mud-palette-primary-darken, var(--mud-palette-primary)));
    font-size: 15px;
}
.ai-assistant .ai-bubble {
    padding: 10px 14px;
    border-radius: 16px;
    font-size: 14px;
    line-height: 1.45;
    white-space: pre-wrap;
    word-wrap: break-word;
    max-width: 78%;
}
.ai-assistant .ai-msg-bot .ai-bubble {
    background: var(--mud-palette-surface, #fff);
    color: var(--mud-palette-text-primary, #1a1a1a) !important;
    border: 1px solid var(--mud-palette-lines-default, rgba(0, 0, 0, 0.08));
    border-bottom-left-radius: 4px;
}
.ai-assistant .ai-msg-user .ai-bubble {
    background: var(--mud-palette-primary);
    color: var(--mud-palette-primary-text, #fff) !important;
    border-bottom-right-radius: 4px;
}

/* ---- Typing indicator ---- */
.ai-assistant .ai-typing { display: flex; gap: 4px; align-items: center; }
.ai-assistant .ai-typing span {
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: var(--mud-palette-text-secondary, #888);
    animation: ai-blink 1.4s infinite both;
}
.ai-assistant .ai-typing span:nth-child(2) { animation-delay: 0.2s; }
.ai-assistant .ai-typing span:nth-child(3) { animation-delay: 0.4s; }
@keyframes ai-blink {
    0%, 80%, 100% { opacity: 0.3; }
    40% { opacity: 1; }
}

/* ---- Input row ---- */
.ai-assistant .ai-input {
    display: flex;
    align-items: flex-end;
    gap: 8px;
    padding: 12px;
    flex-shrink: 0;
    background: var(--mud-palette-surface, #fff);
    border-top: 1px solid var(--mud-palette-lines-default, rgba(0, 0, 0, 0.08));
}
.ai-assistant .ai-textarea {
    flex: 1;
    resize: none;
    max-height: 120px;
    padding: 10px 14px;
    border-radius: 22px;
    border: 1px solid var(--mud-palette-lines-default, rgba(0, 0, 0, 0.15));
    background: var(--mud-palette-background-gray, var(--mud-palette-background, #f2f3f5));
    color: var(--mud-palette-text-primary, #1a1a1a) !important;
    font-size: 14px;
    font-family: inherit;
    line-height: 1.4;
    outline: none;
    transition: border-color 0.15s ease;
}
.ai-assistant .ai-textarea:focus { border-color: var(--mud-palette-primary); }
.ai-assistant .ai-textarea::placeholder { color: var(--mud-palette-text-disabled, #999); }
.ai-assistant .ai-send {
    width: 42px;
    height: 42px;
    flex-shrink: 0;
    border: none;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--mud-palette-primary) 0%, var(--mud-palette-primary-darken, var(--mud-palette-primary)) 100%);
    color: var(--mud-palette-primary-text, #fff);
    font-size: 17px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: transform 0.12s ease, opacity 0.15s ease;
}
.ai-assistant .ai-send:hover:not(:disabled) { transform: scale(1.08); }
.ai-assistant .ai-send:disabled { opacity: 0.45; cursor: default; }

/* ---- Hidden state ---- */
.ai-assistant.hidden .ai-panel { display: none !important; }