/* ==========================================================================
   AI Course Assistant — Chatbot CSS
   Premium, minimal SaaS-style advisor. Blue brand retained.
   ========================================================================== */

/* Design tokens */
:root {
    /* Brand */
    --aica-primary: #0073aa;
    --aica-primary-hover: #005f8d;
    --aica-primary-soft: rgba(0, 115, 170, 0.08);
    --aica-primary-ring: rgba(0, 115, 170, 0.16);

    /* Neutrals */
    --aica-bg: #ffffff;
    --aica-surface: #f7f8fa;
    --aica-text: #1f2933;
    --aica-text-muted: #6b7280;
    --aica-bot-msg-bg: #eef1f5;
    --aica-user-msg-bg: var(--aica-primary);
    --aica-user-msg-text: #ffffff;
    --aica-border: #e6e8eb;
    --aica-border-strong: #d7dbe0;

    /* Accents (used sparingly) */
    --aica-success: #0f9d58;
    --aica-warn: #d97706;

    /* Elevation */
    --aica-shadow-sm: 0 1px 2px rgba(16, 24, 40, 0.06);
    --aica-shadow-md: 0 4px 12px rgba(16, 24, 40, 0.08);
    --aica-shadow-lg: 0 12px 34px rgba(16, 24, 40, 0.18);
    --aica-shadow: var(--aica-shadow-lg);

    /* Radii */
    --aica-radius-sm: 8px;
    --aica-radius-md: 12px;
    --aica-radius-lg: 16px;
    --aica-radius-pill: 999px;

    /* Type */
    --aica-font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen-Sans, Ubuntu, Cantarell, "Helvetica Neue", sans-serif;

    /* Motion */
    --aica-ease: cubic-bezier(0.4, 0, 0.2, 1);
}

/* Container */
.aica-widget-container {
    position: fixed;
    bottom: 20px;
    right: 20px;
    z-index: 999999;
    font-family: var(--aica-font);
    box-sizing: border-box;
    color: var(--aica-text);
    line-height: 1.5;
}

.aica-widget-container * {
    box-sizing: border-box;
}

/* Utilities */
.aica-hidden {
    display: none !important;
}

.aica-visually-hidden {
    position: absolute !important;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* --------------------------------------------------------------------------
   Launcher
   -------------------------------------------------------------------------- */
.aica-launcher-btn {
    background-color: var(--aica-primary);
    color: #ffffff;
    border: none;
    border-radius: 50%;
    width: 60px;
    height: 60px;
    cursor: pointer;
    box-shadow: 0 6px 18px rgba(0, 115, 170, 0.35);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: transform 0.18s var(--aica-ease), background-color 0.18s var(--aica-ease), box-shadow 0.18s var(--aica-ease);
    padding: 0;
}

.aica-launcher-btn:hover {
    transform: translateY(-2px) scale(1.04);
    background-color: var(--aica-primary-hover);
    box-shadow: 0 10px 24px rgba(0, 115, 170, 0.4);
}

.aica-launcher-btn:active {
    transform: translateY(0) scale(0.96);
}

.aica-launcher-btn:focus-visible {
    outline: 3px solid #93c5fd;
    outline-offset: 2px;
}

.aica-launcher-btn svg {
    display: block;
}

/* --------------------------------------------------------------------------
   Chat window
   -------------------------------------------------------------------------- */
.aica-chatbot-window {
    width: 400px;
    height: 620px;
    max-width: calc(100vw - 24px);
    max-height: min(620px, calc(100vh - 100px), calc(100dvh - 100px));
    background: var(--aica-bg);
    border-radius: var(--aica-radius-lg);
    box-shadow: var(--aica-shadow-lg);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    position: absolute;
    bottom: 78px;
    right: 0;
    border: 1px solid var(--aica-border);
    animation: aica-window-in 0.24s var(--aica-ease);
}

@keyframes aica-window-in {
    from { opacity: 0; transform: translateY(12px) scale(0.98); }
    to { opacity: 1; transform: translateY(0) scale(1); }
}

/* --------------------------------------------------------------------------
   Header
   -------------------------------------------------------------------------- */
.aica-chatbot-header {
    background-color: var(--aica-primary);
    color: #ffffff;
    padding: 14px 16px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 12px;
    flex-shrink: 0;
}

.aica-header-info {
    display: flex;
    align-items: center;
    gap: 12px;
    min-width: 0;
}

.aica-bot-avatar {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 38px;
    height: 38px;
    flex-shrink: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.16);
    color: #ffffff;
}

.aica-header-text {
    display: flex;
    flex-direction: column;
    gap: 3px;
    min-width: 0;
}

.aica-bot-name {
    font-weight: 650;
    font-size: 15.5px;
    letter-spacing: 0.1px;
    line-height: 1.2;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.aica-online-status {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 11.5px;
    font-weight: 500;
    color: rgba(224, 242, 254, 0.95);
    line-height: 1;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.aica-online-dot {
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: #4ade80;
    box-shadow: 0 0 0 3px rgba(74, 222, 128, 0.22);
    flex-shrink: 0;
}

.aica-close-btn {
    background: rgba(255, 255, 255, 0.08);
    border: none;
    color: #ffffff;
    font-size: 20px;
    line-height: 1;
    cursor: pointer;
    width: 34px;
    height: 34px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--aica-radius-sm);
    flex-shrink: 0;
    transition: background-color 0.18s var(--aica-ease), transform 0.12s var(--aica-ease);
}

.aica-close-btn:hover {
    background: rgba(255, 255, 255, 0.2);
}

.aica-close-btn:active {
    transform: scale(0.92);
}

.aica-close-btn:focus-visible {
    outline: 2px solid #ffffff;
    outline-offset: 2px;
}

/* --------------------------------------------------------------------------
   Chat area / scroll
   -------------------------------------------------------------------------- */
.aica-chat-area {
    flex: 1;
    padding: 18px 16px;
    overflow-y: auto;
    overflow-x: hidden;
    background-color: var(--aica-surface);
    display: flex;
    flex-direction: column;
    gap: 14px;
    scroll-behavior: smooth;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: thin;
    scrollbar-color: var(--aica-border-strong) transparent;
}

.aica-chat-area::-webkit-scrollbar {
    width: 8px;
}

.aica-chat-area::-webkit-scrollbar-thumb {
    background-color: var(--aica-border-strong);
    border-radius: var(--aica-radius-pill);
    border: 2px solid transparent;
    background-clip: content-box;
}

.aica-chat-area::-webkit-scrollbar-thumb:hover {
    background-color: #c2c7cd;
}

.aica-chat-area::-webkit-scrollbar-track {
    background: transparent;
}

/* --------------------------------------------------------------------------
   Messages
   -------------------------------------------------------------------------- */
.aica-message {
    max-width: 82%;
    display: flex;
    flex-direction: column;
    clear: both;
    min-width: 0;
    animation: aica-msg-in 0.2s var(--aica-ease);
}

@keyframes aica-msg-in {
    from { opacity: 0; transform: translateY(6px); }
    to { opacity: 1; transform: translateY(0); }
}

.aica-message-content {
    padding: 11px 15px;
    border-radius: var(--aica-radius-lg);
    font-size: 14px;
    line-height: 1.55;
    overflow-wrap: anywhere;
    word-break: break-word;
    box-shadow: var(--aica-shadow-sm);
}

.aica-message-content a {
    overflow-wrap: anywhere;
}

.aica-bot-message {
    align-self: flex-start;
}

.aica-bot-message .aica-message-content {
    background-color: var(--aica-bot-msg-bg);
    color: var(--aica-text);
    border-bottom-left-radius: 6px;
}

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

.aica-user-message .aica-message-content {
    background-color: var(--aica-user-msg-bg);
    color: var(--aica-user-msg-text);
    border-bottom-right-radius: 6px;
}

/* Error state — an assistant message with a subtle distinction */
.aica-message-error .aica-message-content {
    background-color: #fdf3f2;
    color: #9b2c22;
    border: 1px solid #f6d5d1;
    box-shadow: none;
}

/* --------------------------------------------------------------------------
   Conversation starters
   -------------------------------------------------------------------------- */
.aica-conversation-starters {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 2px;
    margin-bottom: 2px;
}

.aica-starter-btn {
    background: var(--aica-bg);
    border: 1px solid var(--aica-border-strong);
    color: var(--aica-primary);
    padding: 9px 14px;
    min-height: 38px;
    border-radius: var(--aica-radius-pill);
    font-size: 13px;
    font-weight: 550;
    line-height: 1.25;
    cursor: pointer;
    text-align: left;
    font-family: inherit;
    max-width: 100%;
    transition: background-color 0.16s var(--aica-ease), border-color 0.16s var(--aica-ease), color 0.16s var(--aica-ease), transform 0.1s var(--aica-ease);
}

.aica-starter-btn:hover {
    background: var(--aica-primary-soft);
    border-color: var(--aica-primary);
}

.aica-starter-btn:active {
    transform: scale(0.98);
    background: rgba(0, 115, 170, 0.14);
}

.aica-starter-btn:focus-visible {
    outline: 2px solid var(--aica-primary);
    outline-offset: 2px;
}

/* --------------------------------------------------------------------------
   Typing indicator
   -------------------------------------------------------------------------- */
.aica-typing-indicator {
    align-self: flex-start;
    width: fit-content;
    margin: -4px 16px 8px;
    padding: 13px 16px;
    background-color: var(--aica-bot-msg-bg);
    border-radius: var(--aica-radius-lg);
    border-bottom-left-radius: 6px;
    display: flex;
    align-items: center;
    gap: 5px;
    flex-shrink: 0;
    box-shadow: var(--aica-shadow-sm);
}

.aica-typing-indicator span {
    width: 7px;
    height: 7px;
    background-color: #9aa4b0;
    border-radius: 50%;
    display: inline-block;
    animation: aica-typing 1.3s infinite ease-in-out both;
}

.aica-typing-indicator span:nth-child(1) { animation-delay: -0.32s; }
.aica-typing-indicator span:nth-child(2) { animation-delay: -0.16s; }

@keyframes aica-typing {
    0%, 80%, 100% { transform: scale(0.6); opacity: 0.45; }
    40% { transform: scale(1); opacity: 1; }
}

/* --------------------------------------------------------------------------
   Composer (input + send)
   -------------------------------------------------------------------------- */
.aica-input-area {
    display: flex;
    align-items: center;
    gap: 8px;
    margin: 8px 12px calc(12px + env(safe-area-inset-bottom, 0px));
    padding: 6px 6px 6px 16px;
    background: var(--aica-bg);
    border: 1px solid var(--aica-border-strong);
    border-radius: var(--aica-radius-pill);
    box-shadow: var(--aica-shadow-sm);
    flex-shrink: 0;
    transition: border-color 0.18s var(--aica-ease), box-shadow 0.18s var(--aica-ease);
}

.aica-input-area:focus-within {
    border-color: var(--aica-primary);
    box-shadow: 0 0 0 3px var(--aica-primary-ring);
}

.aica-chat-input {
    flex: 1;
    min-width: 0;
    border: none;
    outline: none;
    background: transparent;
    padding: 9px 0;
    font-size: 14px;
    line-height: 1.35;
    color: var(--aica-text);
    font-family: inherit;
    -webkit-appearance: none;
    appearance: none;
}

.aica-chat-input::placeholder {
    color: #9aa4b0;
}

.aica-send-btn {
    background: var(--aica-primary);
    color: #fff;
    border: none;
    border-radius: 50%;
    width: 42px;
    height: 42px;
    flex-shrink: 0;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0;
    transition: background-color 0.18s var(--aica-ease), transform 0.1s var(--aica-ease), opacity 0.18s var(--aica-ease);
}

.aica-send-btn svg {
    display: block;
    transform: translateX(1px);
}

.aica-send-btn:hover:not(:disabled) {
    background-color: var(--aica-primary-hover);
}

.aica-send-btn:active:not(:disabled) {
    transform: scale(0.92);
}

.aica-send-btn:focus-visible {
    outline: 2px solid var(--aica-primary);
    outline-offset: 2px;
}

.aica-send-btn:disabled {
    background-color: #cbd2d9;
    cursor: not-allowed;
    opacity: 0.75;
}

/* --------------------------------------------------------------------------
   Course recommendation card
   -------------------------------------------------------------------------- */
.aica-course-card {
    margin-top: 14px;
    background: var(--aica-bg);
    border: 1px solid var(--aica-border);
    border-radius: var(--aica-radius-md);
    overflow: hidden;
    box-shadow: var(--aica-shadow-sm);
    font-family: inherit;
    display: flex;
    flex-direction: column;
    width: 100%;
    transition: box-shadow 0.18s var(--aica-ease), transform 0.18s var(--aica-ease);
}

.aica-course-card:hover {
    box-shadow: var(--aica-shadow-md);
}

.aica-course-image {
    width: 100%;
    height: 140px;
    background-size: cover;
    background-position: center;
    background-color: #eef1f5;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #9aa4b0;
    position: relative;
}

.aica-course-image-fallback svg {
    opacity: 0.55;
}

.aica-course-content {
    padding: 14px 15px 15px;
    display: flex;
    flex-direction: column;
    gap: 7px;
}

.aica-course-title {
    font-size: 15px;
    font-weight: 650;
    color: var(--aica-text);
    line-height: 1.3;
    letter-spacing: 0.1px;
}

.aica-course-reason {
    font-size: 13px;
    color: var(--aica-text-muted);
    line-height: 1.5;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.aica-course-meta {
    font-size: 11px;
    color: var(--aica-text-muted);
    font-weight: 500;
    display: flex;
    flex-wrap: wrap;
    gap: 4px;
    align-items: center;
    margin-top: 2px;
}

.aica-course-price {
    font-size: 15px;
    font-weight: 700;
    color: var(--aica-success);
    margin-top: 2px;
    letter-spacing: 0.2px;
}

.aica-status-badge {
    display: inline-flex;
    align-items: center;
    color: #fff;
    padding: 4px 10px;
    border-radius: var(--aica-radius-pill);
    font-size: 11px;
    line-height: 1.2;
    margin-bottom: 2px;
    font-weight: 650;
    width: fit-content;
    letter-spacing: 0.2px;
}

.aica-status-badge-enrolled {
    background: var(--aica-success);
}

.aica-status-badge-purchase {
    background: var(--aica-warn);
}

.aica-course-actions {
    margin-top: 10px;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.aica-btn-primary {
    display: block;
    width: 100%;
    text-align: center;
    background-color: var(--aica-primary);
    color: #ffffff;
    padding: 11px 14px;
    min-height: 42px;
    border-radius: var(--aica-radius-sm);
    font-size: 13.5px;
    font-weight: 650;
    text-decoration: none;
    transition: background-color 0.18s var(--aica-ease), transform 0.1s var(--aica-ease), box-shadow 0.18s var(--aica-ease);
}

.aica-btn-primary:hover, .aica-btn-primary:focus {
    background-color: var(--aica-primary-hover);
    color: #ffffff;
    text-decoration: none;
}

.aica-btn-primary:active {
    transform: scale(0.99);
}

.aica-btn-primary:focus-visible {
    outline: 2px solid #93c5fd;
    outline-offset: 2px;
}

.aica-btn-secondary {
    display: block;
    width: 100%;
    text-align: center;
    background-color: transparent;
    color: var(--aica-primary);
    border: 1px solid var(--aica-border-strong);
    padding: 11px 14px;
    min-height: 42px;
    border-radius: var(--aica-radius-sm);
    font-size: 13.5px;
    font-weight: 650;
    text-decoration: none;
    transition: background-color 0.18s var(--aica-ease), border-color 0.18s var(--aica-ease), color 0.18s var(--aica-ease);
}

.aica-btn-secondary:hover, .aica-btn-secondary:focus {
    background-color: var(--aica-primary-soft);
    border-color: var(--aica-primary);
    color: var(--aica-primary);
    text-decoration: none;
}

.aica-btn-secondary:focus-visible {
    outline: 2px solid #93c5fd;
    outline-offset: 2px;
}

/* --------------------------------------------------------------------------
   Verified learning (enrolled courses, progress)
   -------------------------------------------------------------------------- */
.aica-progress {
    margin-top: 7px;
    display: flex;
    flex-direction: column;
    gap: 5px;
}

.aica-progress-track {
    width: 100%;
    height: 6px;
    background: #e6e8eb;
    border-radius: var(--aica-radius-pill);
    overflow: hidden;
}

.aica-progress-fill {
    height: 100%;
    background: var(--aica-success);
    border-radius: var(--aica-radius-pill);
    transition: width 0.4s var(--aica-ease);
}

.aica-progress-label {
    font-size: 11.5px;
    color: var(--aica-text-muted);
    font-weight: 600;
}

.aica-learning-list {
    margin-top: 12px;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.aica-learning-item {
    background: var(--aica-bg);
    border: 1px solid var(--aica-border);
    border-radius: var(--aica-radius-md);
    padding: 13px 14px;
    box-shadow: var(--aica-shadow-sm);
    display: flex;
    flex-direction: column;
    gap: 5px;
}

.aica-learning-item-head {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 10px;
}

.aica-learning-title {
    font-size: 14px;
    font-weight: 620;
    color: var(--aica-text);
    line-height: 1.35;
}

a.aica-learning-link {
    text-decoration: none;
}

a.aica-learning-link:hover,
a.aica-learning-link:focus {
    color: var(--aica-primary);
    text-decoration: underline;
}

.aica-learning-status {
    flex-shrink: 0;
    margin-bottom: 0;
}

.aica-learning-action {
    display: block;
    width: 100%;
    text-align: center;
    background-color: var(--aica-primary);
    color: #ffffff;
    padding: 9px 12px;
    min-height: 38px;
    border-radius: var(--aica-radius-sm);
    font-size: 12.5px;
    font-weight: 650;
    text-decoration: none;
    margin-top: 8px;
    transition: background-color 0.18s var(--aica-ease), transform 0.1s var(--aica-ease);
}

.aica-learning-action:hover,
.aica-learning-action:focus {
    background-color: var(--aica-primary-hover);
    color: #ffffff;
    text-decoration: none;
}

.aica-learning-action:active {
    transform: scale(0.99);
}

.aica-learning-action:focus-visible {
    outline: 2px solid #93c5fd;
    outline-offset: 2px;
}

.aica-learning-empty {
    font-size: 13px;
    color: var(--aica-text-muted);
    background: var(--aica-bg);
    border: 1px solid var(--aica-border);
    border-radius: var(--aica-radius-md);
    padding: 13px 14px;
}

/* --------------------------------------------------------------------------
   Personalized learning path
   -------------------------------------------------------------------------- */
.aica-learning-path {
    margin-top: 12px;
    background: var(--aica-bg);
    border: 1px solid var(--aica-border);
    border-radius: var(--aica-radius-md);
    padding: 15px;
    box-shadow: var(--aica-shadow-sm);
}

.aica-lp-header {
    font-size: 14px;
    font-weight: 700;
    color: var(--aica-text);
    margin-bottom: 10px;
    letter-spacing: 0.1px;
}

.aica-lp-goal {
    font-size: 13px;
    color: var(--aica-text);
    line-height: 1.45;
    margin-bottom: 5px;
}

.aica-lp-goal-label {
    font-weight: 650;
    color: var(--aica-text-muted);
}

.aica-lp-summary {
    font-size: 12.5px;
    color: var(--aica-text-muted);
    line-height: 1.45;
    margin-bottom: 12px;
}

.aica-lp-steps {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.aica-lp-step {
    border: 1px solid var(--aica-border);
    border-radius: var(--aica-radius-sm);
    padding: 12px 13px;
    background: var(--aica-surface);
    transition: border-color 0.18s var(--aica-ease), background-color 0.18s var(--aica-ease);
}

.aica-lp-step:hover {
    border-color: var(--aica-border-strong);
    background: #fff;
}

.aica-lp-step-num {
    display: inline-block;
    font-size: 10.5px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--aica-primary);
    background: var(--aica-primary-soft);
    padding: 3px 9px;
    border-radius: var(--aica-radius-pill);
    margin-bottom: 8px;
}

.aica-lp-step-body {
    display: flex;
    flex-direction: column;
    gap: 5px;
}

.aica-lp-step-head {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 10px;
}

.aica-lp-title {
    font-size: 14px;
    font-weight: 620;
    color: var(--aica-text);
    line-height: 1.35;
}

a.aica-lp-title {
    text-decoration: none;
}

a.aica-lp-title:hover,
a.aica-lp-title:focus {
    color: var(--aica-primary);
    text-decoration: underline;
}

.aica-lp-status {
    flex-shrink: 0;
    margin-bottom: 0;
}

.aica-lp-reason {
    font-size: 12.5px;
    color: var(--aica-text-muted);
    line-height: 1.45;
}

.aica-lp-action {
    margin-top: 8px;
    padding: 9px 12px;
    min-height: 38px;
    font-size: 12.5px;
}

/* --------------------------------------------------------------------------
   Long-content safety
   -------------------------------------------------------------------------- */
.aica-course-content,
.aica-learning-item,
.aica-lp-step-body {
    min-width: 0;
}

.aica-course-title,
.aica-learning-title,
.aica-lp-title,
.aica-course-reason,
.aica-lp-reason,
.aica-lp-goal,
.aica-lp-summary,
.aica-learning-empty {
    overflow-wrap: anywhere;
    word-break: break-word;
}

.aica-course-card,
.aica-learning-list,
.aica-learning-path {
    max-width: 100%;
}

.aica-learning-item-head,
.aica-lp-step-head {
    min-width: 0;
}

/* --------------------------------------------------------------------------
   Responsive
   -------------------------------------------------------------------------- */
@media screen and (max-width: 480px) {
    .aica-widget-container {
        bottom: 12px;
        right: 12px;
    }

    .aica-chatbot-window {
        width: calc(100vw - 20px);
        height: calc(100dvh - 92px);
        max-height: calc(100dvh - 92px);
        bottom: 70px;
        right: 0;
        border-radius: var(--aica-radius-md);
    }

    .aica-message {
        max-width: 88%;
    }

    .aica-chat-area {
        padding: 16px 12px;
    }

    .aica-launcher-btn {
        width: 56px;
        height: 56px;
    }

    .aica-lp-step-head,
    .aica-learning-item-head {
        flex-direction: column;
        align-items: flex-start;
        gap: 6px;
    }

    .aica-input-area {
        margin: 8px 10px calc(10px + env(safe-area-inset-bottom, 0px));
        padding-left: 14px;
    }
}

@media screen and (max-width: 360px) {
    .aica-bot-name {
        font-size: 14.5px;
    }

    .aica-send-btn {
        width: 40px;
        height: 40px;
    }
}

@media (prefers-reduced-motion: reduce) {
    .aica-widget-container *,
    .aica-widget-container *::before,
    .aica-widget-container *::after {
        animation-duration: 0.001ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.001ms !important;
        scroll-behavior: auto !important;
    }
}