/**
 * AI Conversion OS — Chat Widget Stylesheet
 * Brand: Đất Thủ — Primary #D94A23 | Secondary #172849
 *
 * Table of contents
 * 1.  CSS Variables / Custom Properties
 * 2.  Reset & Base
 * 3.  Widget Root Container
 * 4.  Bubble Trigger
 *     4a. Pulse animation
 *     4b. Notification badge
 *     4c. Close icon state
 *     4d. Open / close toggle
 * 5.  Chat Window
 *     5a. Slide-up animation
 * 6.  Chat Header
 * 7.  Messages Area
 *     7a. Message bubbles — user
 *     7b. Message bubbles — AI
 *     7c. Timestamps
 *     7d. Typing indicator
 * 8.  Quick Suggestions
 * 9.  CTA Buttons
 * 10. Lead Capture Form
 * 11. Input Area
 * 12. Scrollbar
 * 13. Error / Retry state
 * 14. Dark Mode
 * 15. Mobile (<768 px)
 * 16. Utility classes
 */

/* =============================================================================
   1. CSS Variables
   ============================================================================= */
:root {
    --aico-primary:         #D94A23;
    --aico-primary-dark:    #b83a1a;
    --aico-primary-light:   #f0604090;
    --aico-secondary:       #172849;
    --aico-secondary-dark:  #0e1a2f;
    --aico-secondary-light: #253d6a;

    --aico-bg:              #ffffff;
    --aico-bg-msg-ai:       #f3f4f6;
    --aico-bg-input:        #f9fafb;
    --aico-text:            #111827;
    --aico-text-muted:      #6b7280;
    --aico-text-light:      #9ca3af;
    --aico-border:          #e5e7eb;
    --aico-shadow:          0 8px 32px rgba(23, 40, 73, 0.18), 0 2px 8px rgba(0,0,0,0.08);
    --aico-shadow-bubble:   0 4px 20px rgba(217, 74, 35, 0.4);

    --aico-radius-window:   16px;
    --aico-radius-bubble:   14px;
    --aico-radius-pill:     999px;

    --aico-font:            -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    --aico-font-size-base:  14px;
    --aico-font-size-sm:    12px;
    --aico-font-size-xs:    11px;

    --aico-transition:      0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --aico-transition-fast: 0.18s ease;

    /* Bubble position — overridden by JS for bottom-left */
    --aico-bubble-right:    24px;
    --aico-bubble-left:     auto;
    --aico-window-right:    24px;
    --aico-window-left:     auto;

    --aico-z:               999999;
    --aico-window-w:        380px;
    --aico-window-h:        560px;
    --aico-header-h:        64px;
    --aico-input-h:         60px;
}

/* =============================================================================
   2. Reset & Base
   ============================================================================= */
#aico-root *,
#aico-root *::before,
#aico-root *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

#aico-root {
    font-family: var(--aico-font);
    font-size: var(--aico-font-size-base);
    line-height: 1.5;
    color: var(--aico-text);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* =============================================================================
   3. Widget Root Container
   ============================================================================= */
#aico-root {
    position: fixed;
    right: var(--aico-bubble-right);
    left: var(--aico-bubble-left);
    bottom: 24px;
    z-index: var(--aico-z);
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: 12px;
    pointer-events: none; /* Children re-enable as needed */
}

#aico-root[data-position="bottom-left"] {
    --aico-bubble-right: auto;
    --aico-bubble-left: 24px;
    --aico-window-right: auto;
    --aico-window-left: 24px;
    align-items: flex-start;
}

/* =============================================================================
   4. Bubble Trigger
   ============================================================================= */
.aico-bubble {
    position: relative;
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--aico-primary) 0%, var(--aico-secondary) 100%);
    box-shadow: var(--aico-shadow-bubble);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    pointer-events: all;
    user-select: none;
    outline: none;
    border: none;
    transition:
        transform var(--aico-transition),
        box-shadow var(--aico-transition);
    animation: aico-pulse 2.8s ease-in-out infinite;
}

.aico-bubble:hover {
    transform: scale(1.1);
    box-shadow: 0 6px 28px rgba(217, 74, 35, 0.55);
    animation-play-state: paused;
}

.aico-bubble:focus-visible {
    outline: 3px solid var(--aico-primary-light);
    outline-offset: 3px;
}

.aico-bubble:active {
    transform: scale(0.96);
}

.aico-bubble__icon,
.aico-bubble__close {
    position: absolute;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #ffffff;
    transition:
        opacity var(--aico-transition),
        transform var(--aico-transition);
}

.aico-bubble__close {
    opacity: 0;
    transform: rotate(-90deg) scale(0.7);
}

/* 4a. Pulse animation */
@keyframes aico-pulse {
    0%,
    100% {
        box-shadow: var(--aico-shadow-bubble);
    }
    50% {
        box-shadow:
            0 4px 20px rgba(217, 74, 35, 0.4),
            0 0 0 8px rgba(217, 74, 35, 0.12);
    }
}

/* 4b. Notification badge */
.aico-bubble__badge {
    position: absolute;
    top: -4px;
    right: -4px;
    min-width: 20px;
    height: 20px;
    padding: 0 5px;
    background: #ef4444;
    color: #ffffff;
    border-radius: var(--aico-radius-pill);
    font-size: var(--aico-font-size-xs);
    font-weight: 700;
    line-height: 20px;
    text-align: center;
    border: 2px solid #ffffff;
    pointer-events: none;
    transition: transform var(--aico-transition), opacity var(--aico-transition);
}

.aico-bubble__badge[hidden],
.aico-bubble__badge.aico-hidden {
    opacity: 0;
    transform: scale(0);
}

/* 4d. Open state — swap icons */
.aico-bubble.is-open .aico-bubble__icon {
    opacity: 0;
    transform: rotate(90deg) scale(0.7);
}

.aico-bubble.is-open .aico-bubble__close {
    opacity: 1;
    transform: rotate(0deg) scale(1);
}

.aico-bubble.is-open {
    animation: none;
    box-shadow: 0 4px 20px rgba(217, 74, 35, 0.5);
}

/* =============================================================================
   5. Chat Window
   ============================================================================= */
.aico-chat-window {
    position: fixed;
    right: var(--aico-window-right);
    left: var(--aico-window-left);
    bottom: 100px;
    width: var(--aico-window-w);
    height: var(--aico-window-h);
    background: var(--aico-bg);
    border-radius: var(--aico-radius-window);
    box-shadow: var(--aico-shadow);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    pointer-events: all;

    /* Hidden by default */
    opacity: 0;
    transform: translateY(20px) scale(0.97);
    visibility: hidden;
    transition:
        opacity var(--aico-transition),
        transform var(--aico-transition),
        visibility var(--aico-transition);
    transform-origin: bottom center;
    will-change: transform, opacity;
    z-index: calc(var(--aico-z) - 1);
}

/* 5a. Visible / slide-up */
.aico-chat-window.is-open {
    opacity: 1;
    transform: translateY(0) scale(1);
    visibility: visible;
}

#aico-root[data-position="bottom-left"] .aico-chat-window {
    right: var(--aico-window-right);
    left: var(--aico-window-left);
    transform-origin: bottom left;
}

/* =============================================================================
   6. Chat Header
   ============================================================================= */
.aico-header {
    flex-shrink: 0;
    height: var(--aico-header-h);
    background: linear-gradient(135deg, var(--aico-primary) 0%, var(--aico-secondary) 100%);
    display: flex;
    align-items: center;
    padding: 0 16px;
    gap: 12px;
    border-radius: var(--aico-radius-window) var(--aico-radius-window) 0 0;
    position: relative;
    z-index: 2;
    box-shadow: 0 2px 8px rgba(23, 40, 73, 0.15);
}

.aico-header__avatar {
    flex-shrink: 0;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.2);
    border: 2px solid rgba(255, 255, 255, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #ffffff;
    font-weight: 700;
    font-size: 16px;
    overflow: hidden;
}

.aico-header__avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.aico-header__info {
    flex: 1;
    min-width: 0;
}

.aico-header__name {
    font-size: 14px;
    font-weight: 700;
    color: #ffffff;
    line-height: 1.3;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.aico-header__status {
    display: flex;
    align-items: center;
    gap: 5px;
    font-size: var(--aico-font-size-xs);
    color: rgba(255, 255, 255, 0.85);
    line-height: 1;
    margin-top: 3px;
}

.aico-header__status-dot {
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: #4ade80;
    box-shadow: 0 0 0 2px rgba(74, 222, 128, 0.3);
    flex-shrink: 0;
    animation: aico-status-pulse 2s ease-in-out infinite;
}

@keyframes aico-status-pulse {
    0%, 100% { box-shadow: 0 0 0 2px rgba(74, 222, 128, 0.3); }
    50%       { box-shadow: 0 0 0 5px rgba(74, 222, 128, 0.1); }
}

.aico-header__actions {
    display: flex;
    align-items: center;
    gap: 4px;
    flex-shrink: 0;
}

.aico-header__btn {
    width: 32px;
    height: 32px;
    border-radius: 8px;
    border: none;
    background: rgba(255, 255, 255, 0.15);
    color: #ffffff;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background var(--aico-transition-fast);
    outline: none;
    padding: 0;
}

.aico-header__btn:hover {
    background: rgba(255, 255, 255, 0.28);
}

.aico-header__btn:focus-visible {
    outline: 2px solid rgba(255, 255, 255, 0.7);
    outline-offset: 2px;
}

.aico-header__btn svg {
    width: 16px;
    height: 16px;
}

/* =============================================================================
   7. Messages Area
   ============================================================================= */
.aico-messages {
    flex: 1;
    overflow-y: auto;
    overflow-x: hidden;
    padding: 16px 14px 8px;
    display: flex;
    flex-direction: column;
    gap: 10px;
    scroll-behavior: smooth;
    min-height: 0;
}

/* 7a. Individual message wrapper */
.aico-message {
    display: flex;
    flex-direction: column;
    max-width: 80%;
    animation: aico-msg-in var(--aico-transition) both;
}

.aico-message--user {
    align-self: flex-end;
    align-items: flex-end;
}

.aico-message--ai {
    align-self: flex-start;
    align-items: flex-start;
    flex-direction: row;
    gap: 8px;
    max-width: 88%;
}

.aico-message--ai .aico-message__body-wrap {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    max-width: 100%;
}

/* AI mini avatar */
.aico-message--ai .aico-message__avatar {
    flex-shrink: 0;
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--aico-primary), var(--aico-secondary));
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 11px;
    font-weight: 700;
    margin-top: 2px;
}

@keyframes aico-msg-in {
    from {
        opacity: 0;
        transform: translateY(8px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* 7a. User bubble */
.aico-message--user .aico-message__bubble {
    background: linear-gradient(135deg, var(--aico-primary) 0%, var(--aico-primary-dark) 100%);
    color: #ffffff;
    border-radius: var(--aico-radius-bubble) var(--aico-radius-bubble) 4px var(--aico-radius-bubble);
    padding: 10px 14px;
    font-size: var(--aico-font-size-base);
    line-height: 1.5;
    word-break: break-word;
    box-shadow: 0 2px 8px rgba(217, 74, 35, 0.25);
}

/* 7b. AI bubble */
.aico-message--ai .aico-message__bubble {
    background: var(--aico-bg-msg-ai);
    color: var(--aico-text);
    border-radius: var(--aico-radius-bubble) var(--aico-radius-bubble) var(--aico-radius-bubble) 4px;
    padding: 10px 14px;
    font-size: var(--aico-font-size-base);
    line-height: 1.6;
    word-break: break-word;
    border: 1px solid var(--aico-border);
}

/* Inline elements inside AI bubble */
.aico-message__bubble strong { font-weight: 700; }
.aico-message__bubble em     { font-style: italic; }
.aico-message__bubble code {
    font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
    font-size: 0.875em;
    background: rgba(0, 0, 0, 0.06);
    padding: 1px 5px;
    border-radius: 4px;
}

.aico-message__bubble ul {
    padding-left: 18px;
    margin: 6px 0;
}

.aico-message__bubble li {
    margin-bottom: 3px;
}

.aico-message__bubble a {
    color: var(--aico-primary);
    text-decoration: underline;
    word-break: break-all;
}

.aico-message__bubble a:hover {
    color: var(--aico-primary-dark);
}

/* Typing effect cursor */
.aico-typing-cursor {
    display: inline-block;
    width: 2px;
    height: 1em;
    background: var(--aico-text);
    margin-left: 2px;
    vertical-align: text-bottom;
    animation: aico-cursor-blink 0.7s step-end infinite;
}

@keyframes aico-cursor-blink {
    50% { opacity: 0; }
}

/* 7c. Timestamps */
.aico-message__time {
    font-size: var(--aico-font-size-xs);
    color: var(--aico-text-light);
    margin-top: 4px;
    padding: 0 2px;
}

/* 7d. Typing indicator */
.aico-typing {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 0 14px 8px;
    animation: aico-msg-in 0.25s ease both;
}

.aico-typing__avatar {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--aico-primary), var(--aico-secondary));
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 11px;
    font-weight: 700;
    flex-shrink: 0;
}

.aico-typing__dots {
    background: var(--aico-bg-msg-ai);
    border: 1px solid var(--aico-border);
    border-radius: var(--aico-radius-bubble) var(--aico-radius-bubble) var(--aico-radius-bubble) 4px;
    padding: 12px 16px;
    display: flex;
    align-items: center;
    gap: 5px;
}

.aico-typing__dot {
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: var(--aico-text-muted);
    animation: aico-bounce 1.2s ease-in-out infinite;
}

.aico-typing__dot:nth-child(2) { animation-delay: 0.2s; }
.aico-typing__dot:nth-child(3) { animation-delay: 0.4s; }

@keyframes aico-bounce {
    0%, 60%, 100% {
        transform: translateY(0);
        opacity: 0.5;
    }
    30% {
        transform: translateY(-7px);
        opacity: 1;
    }
}

/* =============================================================================
   8. Quick Suggestions
   ============================================================================= */
.aico-suggestions {
    flex-shrink: 0;
    padding: 8px 14px;
    border-top: 1px solid var(--aico-border);
    overflow-x: auto;
    overflow-y: hidden;
    display: flex;
    gap: 8px;
    scrollbar-width: none;
    -ms-overflow-style: none;
    -webkit-overflow-scrolling: touch;
}

.aico-suggestions::-webkit-scrollbar {
    display: none;
}

.aico-suggestion-pill {
    flex-shrink: 0;
    padding: 6px 14px;
    border: 1.5px solid var(--aico-secondary);
    border-radius: var(--aico-radius-pill);
    background: transparent;
    color: var(--aico-secondary);
    font-size: var(--aico-font-size-sm);
    font-weight: 500;
    cursor: pointer;
    white-space: nowrap;
    transition:
        background var(--aico-transition-fast),
        color var(--aico-transition-fast),
        border-color var(--aico-transition-fast),
        transform var(--aico-transition-fast);
    outline: none;
    font-family: var(--aico-font);
}

.aico-suggestion-pill:hover {
    background: var(--aico-secondary);
    color: #ffffff;
    transform: translateY(-1px);
}

.aico-suggestion-pill:focus-visible {
    outline: 2px solid var(--aico-primary);
    outline-offset: 2px;
}

.aico-suggestion-pill:active {
    transform: scale(0.97);
}

/* =============================================================================
   9. CTA Buttons
   ============================================================================= */
.aico-cta-buttons {
    padding: 6px 14px 10px;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.aico-cta-label {
    font-size: var(--aico-font-size-xs);
    color: var(--aico-text-muted);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    margin-bottom: 2px;
}

.aico-cta-btn {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 11px 16px;
    border-radius: 10px;
    border: none;
    cursor: pointer;
    font-size: var(--aico-font-size-base);
    font-weight: 600;
    font-family: var(--aico-font);
    color: #ffffff;
    text-align: left;
    width: 100%;
    transition:
        filter var(--aico-transition-fast),
        transform var(--aico-transition-fast),
        box-shadow var(--aico-transition-fast);
    outline: none;
    text-decoration: none;
}

.aico-cta-btn:hover {
    filter: brightness(1.1);
    transform: translateY(-1px);
    box-shadow: 0 4px 14px rgba(0, 0, 0, 0.2);
}

.aico-cta-btn:active {
    transform: translateY(0);
    filter: brightness(0.95);
}

.aico-cta-btn:focus-visible {
    outline: 3px solid rgba(255,255,255,0.5);
    outline-offset: 2px;
}

/* Button type colors */
.aico-cta-btn--phone   { background: linear-gradient(135deg, #2563eb, #1d4ed8); }
.aico-cta-btn--zalo    { background: linear-gradient(135deg, #0ea5e9, #0284c7); }
.aico-cta-btn--form    { background: linear-gradient(135deg, var(--aico-primary), var(--aico-primary-dark)); }
.aico-cta-btn--booking { background: linear-gradient(135deg, #7c3aed, #6d28d9); }
.aico-cta-btn--payment { background: linear-gradient(135deg, #dc2626, #b91c1c); }

.aico-cta-btn__icon {
    flex-shrink: 0;
    width: 22px;
    height: 22px;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0.9;
}

.aico-cta-btn__icon svg {
    width: 18px;
    height: 18px;
}

.aico-cta-btn__text {
    flex: 1;
    line-height: 1.3;
}

.aico-cta-btn__text small {
    display: block;
    font-size: var(--aico-font-size-xs);
    font-weight: 400;
    opacity: 0.85;
    margin-top: 1px;
}

/* =============================================================================
   10. Lead Capture Form
   ============================================================================= */
.aico-lead-form {
    margin: 8px 14px;
    background: var(--aico-bg);
    border: 1.5px solid var(--aico-border);
    border-radius: 12px;
    padding: 16px;
    animation: aico-slide-in 0.3s ease both;
}

@keyframes aico-slide-in {
    from {
        opacity: 0;
        transform: translateY(12px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.aico-lead-form__title {
    font-size: 14px;
    font-weight: 700;
    color: var(--aico-secondary);
    margin-bottom: 12px;
    display: flex;
    align-items: center;
    gap: 6px;
}

.aico-lead-form__title::before {
    content: "";
    display: inline-block;
    width: 4px;
    height: 16px;
    background: var(--aico-primary);
    border-radius: 2px;
    flex-shrink: 0;
}

.aico-lead-form__group {
    margin-bottom: 10px;
}

.aico-lead-form__label {
    display: block;
    font-size: var(--aico-font-size-xs);
    font-weight: 600;
    color: var(--aico-text-muted);
    margin-bottom: 5px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.aico-lead-form__input {
    width: 100%;
    padding: 9px 12px;
    border: 1.5px solid var(--aico-border);
    border-radius: 8px;
    font-size: var(--aico-font-size-base);
    font-family: var(--aico-font);
    color: var(--aico-text);
    background: var(--aico-bg-input);
    outline: none;
    transition: border-color var(--aico-transition-fast), box-shadow var(--aico-transition-fast);
}

.aico-lead-form__input:focus {
    border-color: var(--aico-primary);
    box-shadow: 0 0 0 3px rgba(217, 74, 35, 0.12);
}

.aico-lead-form__input::placeholder {
    color: var(--aico-text-light);
}

.aico-lead-form__input.is-invalid {
    border-color: #ef4444;
    box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.12);
}

.aico-lead-form__error {
    font-size: var(--aico-font-size-xs);
    color: #ef4444;
    margin-top: 4px;
    display: none;
}

.aico-lead-form__input.is-invalid + .aico-lead-form__error {
    display: block;
}

.aico-lead-form__submit {
    width: 100%;
    padding: 11px;
    background: linear-gradient(135deg, var(--aico-primary) 0%, var(--aico-primary-dark) 100%);
    color: #ffffff;
    border: none;
    border-radius: 8px;
    font-size: var(--aico-font-size-base);
    font-weight: 700;
    font-family: var(--aico-font);
    cursor: pointer;
    margin-top: 4px;
    transition: filter var(--aico-transition-fast), transform var(--aico-transition-fast);
    outline: none;
}

.aico-lead-form__submit:hover {
    filter: brightness(1.08);
    transform: translateY(-1px);
}

.aico-lead-form__submit:active {
    transform: translateY(0);
}

.aico-lead-form__submit:focus-visible {
    outline: 3px solid var(--aico-primary-light);
    outline-offset: 3px;
}

.aico-lead-form__submit:disabled {
    opacity: 0.65;
    cursor: not-allowed;
    transform: none;
}

.aico-lead-form__success {
    text-align: center;
    padding: 12px 0 4px;
    color: #16a34a;
    font-weight: 600;
    font-size: var(--aico-font-size-sm);
    display: none;
}

.aico-lead-form__success.is-visible {
    display: block;
    animation: aico-msg-in 0.3s ease both;
}

/* =============================================================================
   11. Input Area
   ============================================================================= */
.aico-input-area {
    flex-shrink: 0;
    height: var(--aico-input-h);
    padding: 10px 12px;
    border-top: 1px solid var(--aico-border);
    background: var(--aico-bg);
    display: flex;
    align-items: center;
    gap: 8px;
    border-radius: 0 0 var(--aico-radius-window) var(--aico-radius-window);
}

.aico-input-area__attach {
    flex-shrink: 0;
    width: 34px;
    height: 34px;
    border-radius: 8px;
    border: 1.5px solid var(--aico-border);
    background: transparent;
    color: var(--aico-text-muted);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: border-color var(--aico-transition-fast), color var(--aico-transition-fast);
    outline: none;
    padding: 0;
}

.aico-input-area__attach:hover {
    border-color: var(--aico-primary);
    color: var(--aico-primary);
}

.aico-input-area__attach svg {
    width: 16px;
    height: 16px;
}

.aico-input-area__field {
    flex: 1;
    min-height: 36px;
    max-height: 100px;
    padding: 8px 12px;
    border: 1.5px solid var(--aico-border);
    border-radius: 20px;
    background: var(--aico-bg-input);
    font-size: var(--aico-font-size-base);
    font-family: var(--aico-font);
    color: var(--aico-text);
    resize: none;
    outline: none;
    line-height: 1.45;
    transition: border-color var(--aico-transition-fast), box-shadow var(--aico-transition-fast);
    overflow-y: auto;
    scrollbar-width: thin;
}

.aico-input-area__field:focus {
    border-color: var(--aico-primary);
    box-shadow: 0 0 0 3px rgba(217, 74, 35, 0.10);
}

.aico-input-area__field::placeholder {
    color: var(--aico-text-light);
}

.aico-input-area__send {
    flex-shrink: 0;
    width: 38px;
    height: 38px;
    border-radius: 50%;
    border: none;
    background: linear-gradient(135deg, var(--aico-primary) 0%, var(--aico-primary-dark) 100%);
    color: #ffffff;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition:
        filter var(--aico-transition-fast),
        transform var(--aico-transition-fast),
        box-shadow var(--aico-transition-fast);
    outline: none;
    padding: 0;
    box-shadow: 0 2px 8px rgba(217, 74, 35, 0.3);
}

.aico-input-area__send:hover:not(:disabled) {
    filter: brightness(1.1);
    transform: scale(1.08);
    box-shadow: 0 4px 14px rgba(217, 74, 35, 0.45);
}

.aico-input-area__send:active:not(:disabled) {
    transform: scale(0.96);
}

.aico-input-area__send:focus-visible {
    outline: 3px solid var(--aico-primary-light);
    outline-offset: 3px;
}

.aico-input-area__send:disabled {
    opacity: 0.45;
    cursor: not-allowed;
    transform: none;
}

.aico-input-area__send svg {
    width: 18px;
    height: 18px;
    transform: translateX(1px); /* Optical centering for send arrow */
}

/* =============================================================================
   12. Custom Scrollbar (messages area)
   ============================================================================= */
.aico-messages::-webkit-scrollbar {
    width: 4px;
}

.aico-messages::-webkit-scrollbar-track {
    background: transparent;
}

.aico-messages::-webkit-scrollbar-thumb {
    background: var(--aico-border);
    border-radius: 2px;
}

.aico-messages::-webkit-scrollbar-thumb:hover {
    background: var(--aico-text-light);
}

/* Firefox */
.aico-messages {
    scrollbar-width: thin;
    scrollbar-color: var(--aico-border) transparent;
}

/* =============================================================================
   13. Error / Retry State
   ============================================================================= */
.aico-message--error .aico-message__bubble {
    background: #fef2f2;
    border: 1px solid #fecaca;
    color: #dc2626;
}

.aico-message__retry {
    margin-top: 6px;
    padding: 5px 12px;
    background: transparent;
    border: 1.5px solid var(--aico-primary);
    border-radius: var(--aico-radius-pill);
    color: var(--aico-primary);
    font-size: var(--aico-font-size-xs);
    font-weight: 600;
    font-family: var(--aico-font);
    cursor: pointer;
    transition: background var(--aico-transition-fast), color var(--aico-transition-fast);
    outline: none;
}

.aico-message__retry:hover {
    background: var(--aico-primary);
    color: #ffffff;
}

/* =============================================================================
   14. Dark Mode
   ============================================================================= */
@media (prefers-color-scheme: dark) {
    #aico-root {
        --aico-bg:            #1e2022;
        --aico-bg-msg-ai:     #2a2d30;
        --aico-bg-input:      #2a2d30;
        --aico-text:          #f3f4f6;
        --aico-text-muted:    #9ca3af;
        --aico-text-light:    #6b7280;
        --aico-border:        #374151;
        --aico-shadow:        0 8px 32px rgba(0,0,0,0.5), 0 2px 8px rgba(0,0,0,0.3);
    }

    .aico-chat-window {
        background: var(--aico-bg);
    }

    .aico-input-area {
        background: var(--aico-bg);
        border-top-color: var(--aico-border);
    }

    .aico-input-area__field {
        background: var(--aico-bg-input);
        color: var(--aico-text);
        border-color: var(--aico-border);
    }

    .aico-input-area__field::placeholder {
        color: var(--aico-text-light);
    }

    .aico-message--ai .aico-message__bubble {
        background: var(--aico-bg-msg-ai);
        color: var(--aico-text);
        border-color: var(--aico-border);
    }

    .aico-message__bubble code {
        background: rgba(255, 255, 255, 0.08);
    }

    .aico-message__bubble a {
        color: #f87171;
    }

    .aico-lead-form {
        background: var(--aico-bg-msg-ai);
        border-color: var(--aico-border);
    }

    .aico-lead-form__input {
        background: var(--aico-bg);
        color: var(--aico-text);
        border-color: var(--aico-border);
    }

    .aico-suggestion-pill {
        border-color: var(--aico-secondary-light);
        color: #93c5fd;
    }

    .aico-suggestion-pill:hover {
        background: var(--aico-secondary-light);
        color: #ffffff;
    }

    .aico-typing__dots {
        background: var(--aico-bg-msg-ai);
        border-color: var(--aico-border);
    }

    .aico-message--error .aico-message__bubble {
        background: #3b1010;
        border-color: #7f1d1d;
        color: #fca5a5;
    }

    .aico-input-area__attach {
        border-color: var(--aico-border);
        color: var(--aico-text-muted);
    }
}

/* =============================================================================
   15. Mobile (< 768px)
   ============================================================================= */
@media screen and (max-width: 767px) {
    #aico-root {
        --aico-bubble-right: 16px;
        --aico-window-right: 0;
        --aico-window-left: 0;
        bottom: 16px;
    }

    #aico-root[data-position="bottom-left"] {
        --aico-bubble-left: 16px;
        --aico-bubble-right: auto;
    }

    .aico-chat-window {
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        width: 100%;
        height: 100%;
        border-radius: 0;
        transform-origin: bottom center;
    }

    .aico-chat-window.is-open {
        transform: translateY(0) scale(1);
    }

    .aico-header {
        border-radius: 0;
        /* Account for safe area / notch */
        padding-top: max(12px, env(safe-area-inset-top));
        height: calc(var(--aico-header-h) + env(safe-area-inset-top, 0px));
    }

    .aico-input-area {
        border-radius: 0;
        padding-bottom: max(10px, env(safe-area-inset-bottom));
        height: calc(var(--aico-input-h) + env(safe-area-inset-bottom, 0px));
    }

    /* Larger touch targets on mobile */
    .aico-header__btn {
        width: 40px;
        height: 40px;
    }

    .aico-suggestion-pill {
        padding: 8px 16px;
        font-size: 13px;
    }

    .aico-cta-btn {
        padding: 13px 16px;
    }

    .aico-input-area__field {
        font-size: 16px; /* Prevent iOS auto-zoom */
    }

    .aico-input-area__send {
        width: 42px;
        height: 42px;
    }

    /* Hide file attach on small screens to save space */
    .aico-input-area__attach {
        display: none;
    }
}

/* =============================================================================
   16. Utility Classes
   ============================================================================= */
.aico-hidden {
    display: none !important;
}

.aico-sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

.aico-divider {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 4px 14px;
    font-size: var(--aico-font-size-xs);
    color: var(--aico-text-light);
    text-align: center;
}

.aico-divider::before,
.aico-divider::after {
    content: "";
    flex: 1;
    height: 1px;
    background: var(--aico-border);
}

/* Powered-by footer */
.aico-powered-by {
    flex-shrink: 0;
    text-align: center;
    font-size: 10px;
    color: var(--aico-text-light);
    padding: 4px 0 6px;
    line-height: 1.4;
    letter-spacing: 0.03em;
}

.aico-powered-by a {
    color: var(--aico-primary);
    text-decoration: none;
    font-weight: 600;
}