/*
 * AI Assistant — Widget CSS v2
 * ──────────────────────────────────────────────────────────────────────────────
 * Commercial-grade chat widget.
 * All colours via --ai-* CSS custom properties.
 *
 * Host mapping example (add to app.css):
 *   :root {
 *     --ai-accent:          var(--ch-accent, #6366f1);
 *     --ai-accent-hover:    var(--ch-accent-hover, #4f46e5);
 *     --ai-widget-bg:       var(--ch-drawer-bg, #0f172a);
 *     --ai-bubble-bot-bg:   var(--ch-surface-alt, #1e293b);
 *     --ai-bubble-user-bg:  var(--ch-accent, #6366f1);
 *     --ai-input-bg:        var(--ch-input-bg, #0f172a);
 *   }
 */

/* ── Google Font — Inter ─────────────────────────────────────────────────── */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap');

/* ── CSS Variables ────────────────────────────────────────────────────────── */
:root {
    --ai-font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --ai-widget-bg: #0f172a;
    --ai-widget-border: rgba(255,255,255,0.08);
    --ai-bubble-bot-bg: #1e293b;
    --ai-bubble-user-bg: #6366f1;
    --ai-bubble-user-text: #ffffff;
    --ai-bubble-bot-text: #e2e8f0;
    --ai-accent: #6366f1;
    --ai-accent-hover: #4f46e5;
    --ai-accent-light: rgba(99,102,241,0.15);
    --ai-input-bg: #1e293b;
    --ai-input-border: rgba(255,255,255,0.08);
    --ai-input-text: #e2e8f0;
    --ai-input-placeholder: #64748b;
    --ai-shadow: 0 24px 64px rgba(0,0,0,0.5), 0 4px 16px rgba(0,0,0,0.3);
    --ai-header-bg: #6366f1;
    --ai-header-text: #ffffff;
    --ai-star-inactive: #334155;
    --ai-star-active: #f59e0b;
    --ai-error-bg: rgba(239,68,68,0.1);
    --ai-error-text: #fca5a5;
    --ai-success: #34d399;
    --ai-radius: 16px;
    --ai-radius-sm: 10px;
    --ai-radius-xs: 6px;
    --ai-panel-width: 400px;
    --ai-panel-height: 580px;
    --ai-transition: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ── Trigger button ───────────────────────────────────────────────────────── */
.ai-widget-trigger {
    position: fixed;
    z-index: 9999;
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background: var(--ai-accent);
    color: #fff;
    border: none;
    cursor: pointer;
    font-size: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 24px rgba(99,102,241,0.5);
    transition: all var(--ai-transition);
    outline: none;
}

    .ai-widget-trigger:hover {
        background: var(--ai-accent-hover);
        transform: scale(1.1);
        box-shadow: 0 6px 32px rgba(99,102,241,0.6);
    }

    .ai-widget-trigger:active {
        transform: scale(0.96);
    }

.ai-widget-trigger--open {
    background: #334155;
    box-shadow: 0 4px 16px rgba(0,0,0,0.3);
}

.ai-widget-trigger span {
    line-height: 1;
    font-style: normal;
}

/* ── Panel ────────────────────────────────────────────────────────────────── */
.ai-widget-panel {
    position: fixed;
    z-index: 9998;
    width: var(--ai-panel-width);
    height: var(--ai-panel-height);
    display: flex;
    flex-direction: column;
    background: var(--ai-widget-bg);
    border: 1px solid var(--ai-widget-border);
    border-radius: var(--ai-radius);
    box-shadow: var(--ai-shadow);
    font-family: var(--ai-font);
    overflow: hidden;
    animation: ai-panel-in 0.25s cubic-bezier(0.34, 1.56, 0.64, 1);
}

@keyframes ai-panel-in {
    from {
        opacity: 0;
        transform: translateY(12px) scale(0.97);
    }

    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

/* ── Header ───────────────────────────────────────────────────────────────── */
.ai-widget-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 14px 18px;
    background: var(--ai-header-bg);
    color: var(--ai-header-text);
    flex-shrink: 0;
}

.ai-widget-title {
    font-weight: 700;
    font-size: 15px;
    letter-spacing: -0.01em;
}

.ai-widget-app {
    font-weight: 400;
    opacity: 0.8;
    font-size: 13px;
}

.ai-widget-close {
    background: transparent;
    border: none;
    color: var(--ai-header-text);
    cursor: pointer;
    font-size: 18px;
    opacity: 0.75;
    padding: 4px;
    line-height: 1;
    border-radius: 50%;
    width: 28px;
    height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--ai-transition);
}

    .ai-widget-close:hover {
        opacity: 1;
        background: rgba(255,255,255,0.15);
    }

/* ── Messages container ───────────────────────────────────────────────────── */
.ai-widget-messages {
    flex: 1;
    overflow-y: auto;
    padding: 20px 16px;
    display: flex;
    flex-direction: column;
    gap: 16px;
    min-height: 0;
    scrollbar-width: thin;
    scrollbar-color: rgba(255,255,255,0.1) transparent;
}

    .ai-widget-messages::-webkit-scrollbar {
        width: 4px;
    }

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

    .ai-widget-messages::-webkit-scrollbar-thumb {
        background: rgba(255,255,255,0.1);
        border-radius: 2px;
    }

/* ── Welcome ──────────────────────────────────────────────────────────────── */
.ai-widget-welcome {
    text-align: center;
    padding: 12px 0 4px;
}

    .ai-widget-welcome p {
        color: var(--ai-bubble-bot-text);
        font-size: 15px;
        font-weight: 500;
        margin: 0 0 16px;
        line-height: 1.5;
    }

/* ── Bubbles ──────────────────────────────────────────────────────────────── */
.ai-bubble {
    display: flex;
    gap: 10px;
    max-width: 100%;
}

.ai-bubble--user {
    justify-content: flex-end;
}

    .ai-bubble--user .ai-bubble-content {
        background: var(--ai-bubble-user-bg);
        color: var(--ai-bubble-user-text);
        border-radius: 18px 18px 4px 18px;
        padding: 11px 16px;
        font-size: 14px;
        font-weight: 400;
        max-width: 78%;
        line-height: 1.6;
        word-break: break-word;
        box-shadow: 0 2px 8px rgba(99,102,241,0.25);
    }

.ai-bubble--bot {
    align-items: flex-start;
}

.ai-bubble-avatar {
    width: 34px;
    height: 34px;
    border-radius: 50%;
    background: var(--ai-accent-light);
    border: 1px solid rgba(99,102,241,0.3);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 16px;
    flex-shrink: 0;
    margin-top: 2px;
}

.ai-bubble-body {
    display: flex;
    flex-direction: column;
    gap: 8px;
    max-width: 82%;
}

.ai-bubble--bot .ai-bubble-content {
    background: var(--ai-bubble-bot-bg);
    color: var(--ai-bubble-bot-text);
    border-radius: 4px 18px 18px 18px;
    padding: 11px 16px;
    font-size: 14px;
    line-height: 1.7;
    word-break: break-word;
    border: 1px solid var(--ai-widget-border);
}

/* ── Typing indicator ─────────────────────────────────────────────────────── */
.ai-typing {
    display: flex;
    gap: 5px;
    padding: 6px 2px;
    align-items: center;
}

    .ai-typing span {
        width: 7px;
        height: 7px;
        border-radius: 50%;
        background: var(--ai-accent);
        opacity: 0.4;
        animation: ai-bounce 1.4s ease-in-out infinite;
    }

        .ai-typing span:nth-child(2) {
            animation-delay: 0.16s;
        }

        .ai-typing span:nth-child(3) {
            animation-delay: 0.32s;
        }

@keyframes ai-bounce {
    0%, 60%, 100% {
        transform: translateY(0);
        opacity: 0.4;
    }

    30% {
        transform: translateY(-6px);
        opacity: 1;
    }
}

/* ── Error ────────────────────────────────────────────────────────────────── */
.ai-widget-error {
    background: var(--ai-error-bg);
    color: var(--ai-error-text);
    border-radius: var(--ai-radius-sm);
    padding: 10px 14px;
    font-size: 13px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 8px;
    border: 1px solid rgba(239,68,68,0.2);
}

    .ai-widget-error button {
        background: transparent;
        border: none;
        cursor: pointer;
        color: var(--ai-error-text);
        font-size: 16px;
        padding: 0;
        opacity: 0.7;
    }

        .ai-widget-error button:hover {
            opacity: 1;
        }

/* ── Input area ───────────────────────────────────────────────────────────── */
.ai-widget-input-area {
    padding: 12px;
    border-top: 1px solid var(--ai-widget-border);
    flex-shrink: 0;
    background: var(--ai-widget-bg);
}

.ai-default-input {
    display: flex;
    gap: 8px;
    align-items: flex-end;
    background: var(--ai-input-bg);
    border: 1px solid var(--ai-input-border);
    border-radius: 14px;
    padding: 6px 6px 6px 14px;
    transition: border-color var(--ai-transition);
}

    .ai-default-input:focus-within {
        border-color: var(--ai-accent);
        box-shadow: 0 0 0 3px var(--ai-accent-light);
    }

.ai-default-textarea {
    flex: 1;
    background: transparent;
    color: var(--ai-input-text);
    border: none;
    padding: 6px 0;
    font-size: 14px;
    font-family: var(--ai-font);
    resize: none;
    outline: none;
    line-height: 1.5;
    max-height: 100px;
    overflow-y: auto;
}

    .ai-default-textarea::placeholder {
        color: var(--ai-input-placeholder);
    }

.ai-default-send {
    background: var(--ai-accent);
    color: #fff;
    border: none;
    border-radius: 10px;
    width: 36px;
    height: 36px;
    cursor: pointer;
    font-size: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    transition: all var(--ai-transition);
}

    .ai-default-send:hover:not(:disabled) {
        background: var(--ai-accent-hover);
        transform: scale(1.05);
    }

    .ai-default-send:disabled {
        opacity: 0.35;
        cursor: not-allowed;
    }

/* ── Topic browser ────────────────────────────────────────────────────────── */
.ai-topic-browser {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.ai-topic-hint {
    font-size: 12px;
    color: var(--ai-input-placeholder);
    margin: 0;
    text-align: center;
}

.ai-topic-categories {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    justify-content: center;
}

.ai-topic-chip {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 7px 14px;
    border-radius: 20px;
    border: 1px solid var(--ai-widget-border);
    background: var(--ai-bubble-bot-bg);
    color: var(--ai-bubble-bot-text);
    cursor: pointer;
    font-size: 13px;
    font-family: var(--ai-font);
    font-weight: 500;
    transition: all var(--ai-transition);
}

    .ai-topic-chip:hover {
        border-color: var(--ai-accent);
        background: var(--ai-accent);
        color: #fff;
        transform: translateY(-1px);
    }

.ai-topic-header {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 4px;
}

.ai-topic-back {
    background: transparent;
    border: none;
    color: var(--ai-accent);
    cursor: pointer;
    font-size: 13px;
    font-family: var(--ai-font);
    font-weight: 500;
    padding: 0;
    transition: opacity var(--ai-transition);
}

    .ai-topic-back:hover {
        opacity: 0.7;
    }

.ai-topic-category-title {
    font-size: 13px;
    font-weight: 600;
    color: var(--ai-bubble-bot-text);
}

.ai-topic-questions {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.ai-topic-question {
    text-align: left;
    padding: 10px 14px;
    border-radius: var(--ai-radius-sm);
    border: 1px solid var(--ai-widget-border);
    background: var(--ai-bubble-bot-bg);
    color: var(--ai-bubble-bot-text);
    cursor: pointer;
    font-size: 13px;
    font-family: var(--ai-font);
    font-weight: 400;
    line-height: 1.4;
    transition: all var(--ai-transition);
}

    .ai-topic-question:hover {
        border-color: var(--ai-accent);
        color: var(--ai-accent);
        background: var(--ai-accent-light);
        transform: translateX(2px);
    }

/* ── Feedback bar ─────────────────────────────────────────────────────────── */
.ai-feedback-bar {
    display: flex;
    flex-direction: column;
    gap: 8px;
    padding: 10px 12px;
    background: rgba(255,255,255,0.03);
    border-radius: var(--ai-radius-sm);
    border: 1px solid var(--ai-widget-border);
    margin-top: 4px;
}

.ai-feedback-row {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-wrap: wrap;
}

/* Thumbs */
.ai-feedback-thumbs {
    display: flex;
    gap: 6px;
}

.ai-feedback-thumb {
    background: transparent;
    border: 1px solid var(--ai-widget-border);
    border-radius: var(--ai-radius-xs);
    cursor: pointer;
    padding: 5px 10px;
    font-size: 16px;
    line-height: 1;
    transition: all var(--ai-transition);
}

    .ai-feedback-thumb:hover {
        border-color: var(--ai-accent);
        transform: scale(1.1);
    }

    .ai-feedback-thumb.active-up {
        border-color: #34d399;
        background: rgba(52,211,153,0.12);
    }

    .ai-feedback-thumb.active-down {
        border-color: #f87171;
        background: rgba(248,113,113,0.12);
    }

/* Stars */
.ai-feedback-score {
    display: flex;
    gap: 2px;
    align-items: center;
}

.ai-feedback-star {
    background: transparent;
    border: none;
    cursor: pointer;
    font-size: 22px;
    padding: 0 1px;
    line-height: 1;
    color: var(--ai-star-inactive);
    transition: all var(--ai-transition);
    outline: none;
}

    .ai-feedback-star.active {
        color: var(--ai-star-active);
        transform: scale(1.1);
    }

    .ai-feedback-star:hover {
        color: var(--ai-star-active);
        transform: scale(1.15);
    }

/* Hint */
.ai-feedback-hint {
    font-size: 11px;
    color: #f87171;
    font-style: italic;
}

/* Comment */
.ai-feedback-comment-toggle {
    background: transparent;
    border: none;
    color: var(--ai-input-placeholder);
    cursor: pointer;
    font-size: 12px;
    font-family: var(--ai-font);
    padding: 0;
    transition: color var(--ai-transition);
}

    .ai-feedback-comment-toggle:hover {
        color: var(--ai-accent);
    }

.ai-feedback-comment {
    width: 100%;
    background: var(--ai-input-bg);
    color: var(--ai-input-text);
    border: 1px solid var(--ai-input-border);
    border-radius: var(--ai-radius-xs);
    padding: 8px 10px;
    font-size: 13px;
    font-family: var(--ai-font);
    resize: vertical;
    outline: none;
    transition: border-color var(--ai-transition);
    box-sizing: border-box;
}

    .ai-feedback-comment:focus {
        border-color: var(--ai-accent);
    }

/* Submit */
.ai-feedback-actions {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-wrap: wrap;
}

.ai-feedback-submit {
    background: var(--ai-accent);
    color: #fff;
    border: none;
    border-radius: var(--ai-radius-xs);
    padding: 6px 16px;
    font-size: 13px;
    font-family: var(--ai-font);
    font-weight: 600;
    cursor: pointer;
    transition: all var(--ai-transition);
    letter-spacing: 0.01em;
}

    .ai-feedback-submit:hover:not(:disabled) {
        background: var(--ai-accent-hover);
        transform: translateY(-1px);
    }

    .ai-feedback-submit:disabled {
        opacity: 0.35;
        cursor: not-allowed;
    }

/* Submitted state */
.ai-feedback-submitted {
    padding: 8px 12px;
}

.ai-feedback-thanks {
    font-size: 13px;
    color: var(--ai-success);
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 6px;
}

/* ── Admin page ───────────────────────────────────────────────────────────── */
.ai-admin-page {
    padding: 24px;
    max-width: 1100px;
    font-family: var(--ai-font);
}

.ai-admin-title {
    margin: 0 0 20px;
    font-size: 22px;
    font-weight: 700;
    letter-spacing: -0.02em;
}

.ai-admin-filters {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-wrap: wrap;
    margin-bottom: 24px;
}

.ai-admin-date {
    padding: 7px 12px;
    border: 1px solid var(--ai-input-border, #e2e8f0);
    border-radius: var(--ai-radius-xs);
    font-size: 14px;
    font-family: var(--ai-font);
    background: var(--ai-input-bg, #fff);
    color: var(--ai-input-text, #1e293b);
}

.ai-admin-btn {
    padding: 7px 18px;
    border-radius: var(--ai-radius-xs);
    border: none;
    background: var(--ai-accent);
    color: #fff;
    cursor: pointer;
    font-size: 14px;
    font-family: var(--ai-font);
    font-weight: 600;
    transition: all var(--ai-transition);
}

    .ai-admin-btn:hover {
        background: var(--ai-accent-hover);
    }

.ai-admin-btn--secondary {
    background: transparent;
    border: 1px solid var(--ai-accent);
    color: var(--ai-accent);
}

    .ai-admin-btn--secondary:hover {
        background: var(--ai-accent-light);
    }

.ai-admin-loading {
    padding: 20px;
    opacity: 0.6;
    font-size: 14px;
}

.ai-admin-error {
    padding: 12px;
    color: #f87171;
    font-size: 14px;
}

.ai-admin-section-title {
    margin: 24px 0 12px;
    font-size: 16px;
    font-weight: 700;
    letter-spacing: -0.01em;
}

.ai-admin-summary {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-bottom: 24px;
}

.ai-admin-stat {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 18px 24px;
    border: 1px solid var(--ai-widget-border, #e5e7eb);
    border-radius: var(--ai-radius-sm);
    min-width: 120px;
    gap: 4px;
    background: var(--ai-bubble-bot-bg, #f8fafc);
}

.ai-admin-stat-value {
    font-size: 26px;
    font-weight: 800;
    letter-spacing: -0.02em;
}

.ai-admin-stat-value--score {
    color: var(--ai-star-active, #f59e0b);
}

.ai-admin-stat-value--thumbs {
    color: #34d399;
}

.ai-admin-stat-label {
    font-size: 12px;
    opacity: 0.55;
    font-weight: 500;
}

.ai-admin-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 14px;
}

    .ai-admin-table th {
        text-align: left;
        padding: 10px 14px;
        border-bottom: 2px solid var(--ai-widget-border, #e5e7eb);
        font-weight: 700;
        font-size: 12px;
        text-transform: uppercase;
        letter-spacing: 0.05em;
        opacity: 0.6;
    }

    .ai-admin-table td {
        padding: 10px 14px;
        border-bottom: 1px solid var(--ai-widget-border, #f1f5f9);
    }

.ai-admin-row--poor td:first-child {
    color: #f87171;
    font-weight: 600;
}

/* ── Feedback send button ─────────────────────────────────────────────────── */
.ai-feedback-send {
    background: var(--ai-accent);
    color: #fff;
    border: none;
    border-radius: 6px;
    width: 28px;
    height: 28px;
    cursor: pointer;
    font-size: 13px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    margin-left: auto;
    transition: all var(--ai-transition);
    padding: 0;
}

    .ai-feedback-send:hover:not(:disabled) {
        background: var(--ai-accent-hover);
        transform: scale(1.1);
    }

    .ai-feedback-send:disabled {
        opacity: 0.3;
        cursor: not-allowed;
    }