/* ========================================
   AI CHAT WIDGET — Dark Glassmorphism
   ======================================== */

.kv-chat-toggle {
    position: fixed; bottom: 28px; right: 28px; z-index: 9999;
    display: flex; align-items: center; gap: 10px;
    background: linear-gradient(135deg, #a5e7ff 0%, #00e1ab 100%);
    color: #0B0F19;
    border: none; border-radius: 50px; padding: 16px 28px;
    font-family: var(--kv-font-mono, monospace); font-size: 14px; font-weight: 700;
    cursor: pointer;
    box-shadow: 0 4px 24px rgba(165, 231, 255, 0.4), 0 0 40px rgba(0, 225, 171, 0.15);
    transition: all 300ms cubic-bezier(0.16, 1, 0.3, 1);
    letter-spacing: 0.02em;
    animation: kv-chat-btn-pulse 3s ease-in-out infinite;
}
@keyframes kv-chat-btn-pulse {
    0%, 100% { box-shadow: 0 4px 24px rgba(165, 231, 255, 0.4), 0 0 40px rgba(0, 225, 171, 0.15); }
    50% { box-shadow: 0 4px 32px rgba(165, 231, 255, 0.6), 0 0 60px rgba(0, 225, 171, 0.3); }
}
.kv-chat-toggle:hover {
    transform: translateY(-3px) scale(1.03);
    box-shadow: 0 8px 40px rgba(165, 231, 255, 0.5), 0 0 60px rgba(0, 225, 171, 0.25);
}
.kv-chat-toggle svg { width: 22px; height: 22px; }

.kv-chat-panel {
    position: fixed; bottom: 28px; right: 28px; z-index: 10000;
    width: 400px; max-height: 580px;
    background: rgba(15, 19, 29, 0.95);
    backdrop-filter: blur(24px); -webkit-backdrop-filter: blur(24px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 16px;
    box-shadow: 0 16px 64px rgba(0, 0, 0, 0.5), 0 0 24px rgba(165, 231, 255, 0.1);
    display: none; flex-direction: column;
    overflow: hidden;
    animation: kv-chat-slide-up 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}
.kv-chat-panel.kv-chat--open { display: flex; }

@keyframes kv-chat-slide-up {
    from { opacity: 0; transform: translateY(20px) scale(0.95); }
    to { opacity: 1; transform: translateY(0) scale(1); }
}

.kv-chat-header {
    display: flex; justify-content: space-between; align-items: center;
    padding: 16px 20px;
    background: rgba(28, 31, 42, 0.8);
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}
.kv-chat-header__title {
    display: flex; align-items: center; gap: 10px;
    font-family: var(--kv-font-display, sans-serif); font-size: 15px; font-weight: 600;
    color: var(--kv-on-surface, #dfe2f1);
}
.kv-chat-header__dot {
    width: 8px; height: 8px; border-radius: 50%; background: #00e1ab;
    animation: kv-chat-pulse 2s infinite;
}
@keyframes kv-chat-pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.4; }
}
.kv-chat-header__close {
    background: none; border: none; color: var(--kv-on-surface-variant, #bbc9cf);
    cursor: pointer; padding: 4px; font-size: 20px; line-height: 1;
}
.kv-chat-header__close:hover { color: var(--kv-on-surface, #dfe2f1); }

.kv-chat-messages {
    flex: 1; overflow-y: auto; padding: 16px 20px;
    display: flex; flex-direction: column; gap: 12px;
    min-height: 300px; max-height: 380px;
    scrollbar-width: thin;
    scrollbar-color: var(--kv-outline-variant, #3c494e) transparent;
}
.kv-chat-messages::-webkit-scrollbar { width: 4px; }
.kv-chat-messages::-webkit-scrollbar-thumb { background: var(--kv-outline-variant, #3c494e); border-radius: 4px; }

.kv-chat-msg {
    max-width: 85%; padding: 10px 14px; border-radius: 12px;
    font-size: 14px; line-height: 1.5;
    animation: kv-chat-fade-in 0.2s ease;
}
@keyframes kv-chat-fade-in {
    from { opacity: 0; transform: translateY(8px); }
    to { opacity: 1; transform: translateY(0); }
}
.kv-chat-msg--ai {
    align-self: flex-start;
    background: var(--kv-surface-container-high, #262a35);
    color: var(--kv-on-surface, #dfe2f1);
    border-bottom-left-radius: 4px;
}
.kv-chat-msg--user {
    align-self: flex-end;
    background: var(--kv-primary, #a5e7ff);
    color: var(--kv-base, #0B0F19);
    border-bottom-right-radius: 4px;
}
.kv-chat-msg--error {
    align-self: center;
    background: rgba(255, 180, 171, 0.1);
    border: 1px solid var(--kv-error, #ffb4ab);
    color: var(--kv-error, #ffb4ab);
    font-size: 13px;
}

.kv-chat-typing {
    align-self: flex-start;
    display: flex; gap: 4px; padding: 12px 16px;
    background: var(--kv-surface-container-high, #262a35);
    border-radius: 12px; border-bottom-left-radius: 4px;
}
.kv-chat-typing span {
    width: 6px; height: 6px; border-radius: 50%;
    background: var(--kv-outline, #859399);
    animation: kv-chat-bounce 1.4s infinite;
}
.kv-chat-typing span:nth-child(2) { animation-delay: 0.2s; }
.kv-chat-typing span:nth-child(3) { animation-delay: 0.4s; }
@keyframes kv-chat-bounce {
    0%, 60%, 100% { transform: translateY(0); }
    30% { transform: translateY(-6px); }
}

.kv-chat-input-area {
    display: flex; gap: 8px; padding: 12px 16px;
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    background: rgba(28, 31, 42, 0.5);
}
.kv-chat-input {
    flex: 1; padding: 10px 14px;
    background: var(--kv-surface-container-high, #262a35);
    border: 1px solid var(--kv-outline-variant, #3c494e);
    border-radius: 10px; color: var(--kv-on-surface, #dfe2f1);
    font-family: var(--kv-font-body, sans-serif); font-size: 14px;
    outline: none; transition: border-color 200ms ease;
}
.kv-chat-input:focus { border-color: var(--kv-primary, #a5e7ff); }
.kv-chat-input::placeholder { color: var(--kv-on-surface-variant, #bbc9cf); }

.kv-chat-send {
    display: flex; align-items: center; justify-content: center;
    width: 40px; height: 40px;
    background: var(--kv-primary, #a5e7ff);
    border: none; border-radius: 10px;
    color: var(--kv-base, #0B0F19); cursor: pointer;
    transition: all 200ms ease;
}
.kv-chat-send:hover { box-shadow: 0 0 12px var(--kv-primary, #a5e7ff); }
.kv-chat-send:disabled { opacity: 0.4; cursor: not-allowed; }
.kv-chat-send svg { width: 18px; height: 18px; }

@media (max-width: 480px) {
    .kv-chat-panel {
        width: calc(100vw - 16px); right: 8px; bottom: 8px;
        max-height: 70vh;
    }
    .kv-chat-toggle { bottom: 16px; right: 16px; padding: 12px 18px; font-size: 12px; }
}

/* ========================================
   AI MESSAGE FORMATTING — Structured/Markdown
   ======================================== */

.kv-chat-msg--ai {
    white-space: pre-wrap;
    word-wrap: break-word;
}
.kv-chat-msg--ai strong, .kv-chat-msg--ai b {
    color: var(--kv-primary, #a5e7ff);
    font-weight: 600;
}
.kv-chat-msg--ai em {
    color: var(--kv-secondary-fixed, #00e1ab);
    font-style: normal;
}
.kv-chat-msg--ai code {
    font-family: var(--kv-font-mono, monospace);
    background: rgba(165, 231, 255, 0.08);
    padding: 2px 6px;
    border-radius: 4px;
    font-size: 13px;
    color: var(--kv-primary, #a5e7ff);
}
.kv-chat-msg--ai hr {
    border: none;
    border-top: 1px solid var(--kv-outline-variant, #3c494e);
    margin: 10px 0;
}