/* ===========================================
   Phase 7: AI chat — launcher, panel, modal
   =========================================== */

/* --- Navbar settings button --- */
.ai-settings-btn {
    background: transparent;
    border: none;
    width: 40px;
    height: 40px;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    color: var(--text-primary, #1f2937);
    transition: background 0.15s ease;
}
.ai-settings-btn:hover { background: var(--bg-secondary, #f3f4f6); }
.ai-settings-btn svg { width: 22px; height: 22px; }

/* --- Bottom-right launcher --- */
.chat-launcher {
    position: fixed;
    bottom: 24px;
    right: 24px;
    width: 56px;
    height: 56px;
    border-radius: 50%;
    border: none;
    background: var(--primary-gradient, linear-gradient(135deg, #667eea 0%, #5568d3 100%));
    color: white;
    cursor: pointer;
    box-shadow: 0 4px 16px rgba(0,0,0,0.2);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9000;
    transition: transform 0.15s ease, box-shadow 0.15s ease;
}
.chat-launcher:hover { transform: scale(1.05); box-shadow: 0 6px 20px rgba(102,126,234,0.4); }
.chat-launcher svg { width: 28px; height: 28px; }

/* --- Launcher popover --- */
.chat-launcher-popover {
    position: fixed;
    bottom: 96px;
    right: 24px;
    min-width: 240px;
    max-width: 320px;
    background: var(--bg-primary, #fff);
    border: 1px solid var(--border-primary, #e5e7eb);
    border-radius: 12px;
    box-shadow: 0 8px 32px rgba(0,0,0,0.15);
    padding: 8px;
    z-index: 9000;
    display: none;
}
.chat-launcher-popover.is-open { display: block; }
.chat-launcher-popover__title {
    font-size: 0.85em;
    font-weight: 600;
    color: var(--text-tertiary, #6b7280);
    padding: 8px 12px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}
.chat-launcher-popover__item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 12px;
    border-radius: 8px;
    cursor: pointer;
    color: var(--text-primary, #1f2937);
    font-size: 0.95em;
    transition: background 0.1s ease;
}
.chat-launcher-popover__item:hover { background: var(--bg-secondary, #f3f4f6); }
.chat-launcher-popover__item__icon { font-size: 1.2em; }
.chat-launcher-popover__divider {
    height: 1px;
    background: var(--border-primary, #e5e7eb);
    margin: 4px 0;
}

/* --- Settings modal extends existing .modal-overlay --- */
/* Show when active. Subpages also define .modal-overlay.active in their
   stylesheets, but the homepage only loads common.css which defines
   .modal-overlay.show. This rule ensures the AI settings modal works on
   every page that loads ai-chat.css. */
.ai-settings-modal.active { display: flex; }
.ai-settings-modal .modal-container { max-width: 720px; }
.ai-settings-modal__agents { display: flex; flex-direction: column; gap: 12px; }
.ai-settings-modal__agent-row {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px;
    background: var(--bg-secondary, #f8f9fa);
    border-radius: 8px;
    border: 1px solid var(--border-primary, #e5e7eb);
}
.ai-settings-modal__agent-icon { font-size: 1.5em; }
.ai-settings-modal__agent-info { flex: 1; }
.ai-settings-modal__agent-name { font-weight: 600; }
.ai-settings-modal__agent-meta { font-size: 0.85em; color: var(--text-tertiary, #6b7280); }
.ai-settings-modal__agent-actions { display: flex; gap: 8px; }
.ai-settings-modal__icon-btn {
    background: transparent;
    border: 1px solid var(--border-primary, #e5e7eb);
    border-radius: 6px;
    padding: 6px 10px;
    cursor: pointer;
}
.ai-settings-modal__icon-btn:hover { background: var(--bg-tertiary, #e5e7eb); }
.ai-settings-modal__add-btn {
    align-self: flex-start;
    padding: 10px 16px;
    background: var(--primary-color, #667eea);
    color: white;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-weight: 500;
}
.ai-settings-modal__advanced { margin-top: 24px; }
.ai-settings-modal__advanced summary {
    cursor: pointer;
    padding: 8px 0;
    color: var(--text-tertiary, #6b7280);
}

/* --- Agent form --- */
.agent-form { display: flex; flex-direction: column; gap: 16px; }
.agent-form__row { display: flex; flex-direction: column; gap: 6px; }
.agent-form__row label { font-weight: 500; font-size: 0.9em; }
.agent-form__row input[type="text"],
.agent-form__row input[type="password"],
.agent-form__row select,
.agent-form__row textarea {
    padding: 10px 12px;
    border: 1px solid var(--border-primary, #d1d5db);
    border-radius: 6px;
    background: var(--bg-primary, #fff);
    color: var(--text-primary, #1f2937);
    font-size: 0.95em;
    font-family: inherit;
}
.agent-form__row textarea { min-height: 100px; resize: vertical; }
.agent-form__row__row { display: flex; gap: 8px; align-items: center; }
.agent-form__row__row select { flex: 1; }
.agent-form__temp-display {
    font-variant-numeric: tabular-nums;
    color: var(--primary-color, #667eea);
    font-weight: 600;
    margin-left: 8px;
}
.agent-form__error {
    color: var(--danger, #dc2626);
    font-size: 0.85em;
    display: none;
}
.agent-form__error.is-visible { display: block; }
.agent-form__actions { display: flex; justify-content: flex-end; gap: 8px; margin-top: 8px; }

/* --- Chat panel --- */
/* Messenger-style floating chat: 340x480 in bottom-right, above launcher.
   Launcher button (bottom: 24, height 56) → chat sits at bottom: 96 with 16px gap. */
.chat-panel {
    position: fixed;
    bottom: 96px;
    right: 24px;
    top: auto;
    width: 340px;
    height: 480px;
    max-height: calc(100vh - 120px);
    background: var(--bg-primary, #fff);
    border: 1px solid var(--border-primary, #e5e7eb);
    border-radius: 12px;
    box-shadow: 0 12px 40px rgba(0,0,0,0.18);
    overflow: hidden;
    display: none;
    flex-direction: column;
    z-index: 9050;
    transition: height 0.2s ease;
}
.chat-panel.is-open { display: flex; }

/* Minimized: shows only the header, body + input collapse out of flow */
.chat-panel.is-minimized {
    height: auto;
    max-height: none;
}
.chat-panel.is-minimized .chat-panel__body,
.chat-panel.is-minimized .chat-panel__input { display: none; }
.chat-panel.is-minimized .chat-panel__header { cursor: pointer; }
.chat-panel.is-minimized .chat-panel__header__minimize svg { transform: rotate(180deg); }
.chat-panel__header {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    border-bottom: 1px solid var(--border-primary, #e5e7eb);
}
.chat-panel__header__title { flex: 1; font-weight: 600; }
.chat-panel__header__btn {
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 6px 8px;
    border-radius: 6px;
    color: var(--text-primary, #1f2937);
}
.chat-panel__header__btn:hover { background: var(--bg-secondary, #f3f4f6); }

.chat-panel__body { flex: 1; display: flex; overflow: hidden; }

/* Threads sidebar: collapsed by default for compact messenger style.
   User toggles via the threads button in header. */
.chat-panel__threads {
    width: 0;
    padding: 0;
    border-right: 1px solid var(--border-primary, #e5e7eb);
    overflow-y: auto;
    background: var(--bg-secondary, #fafbfc);
    flex: 0 0 auto;
    overflow: hidden;
    transition: width 0.2s ease, padding 0.2s ease;
}
.chat-panel__threads.is-expanded {
    width: 140px;
    padding: 8px;
    overflow-y: auto;
}
.chat-panel__threads__heading {
    font-size: 0.8em;
    font-weight: 600;
    color: var(--text-tertiary, #6b7280);
    padding: 4px 8px;
    text-transform: uppercase;
}
.chat-panel__threads__new {
    width: 100%;
    text-align: left;
    padding: 8px 10px;
    background: transparent;
    border: 1px dashed var(--border-primary, #cbd5e1);
    border-radius: 6px;
    color: var(--primary-color, #667eea);
    cursor: pointer;
    margin: 4px 0 8px;
    font-weight: 500;
}
.chat-panel__threads__item {
    padding: 8px 10px;
    border-radius: 6px;
    cursor: pointer;
    font-size: 0.9em;
}
.chat-panel__threads__item:hover { background: var(--bg-tertiary, rgba(0,0,0,0.04)); }
.chat-panel__threads__item.is-active { background: var(--primary-light, #e0e7ff); color: var(--primary-color, #667eea); font-weight: 500; }
.chat-panel__threads__item__title { font-weight: 500; line-height: 1.3; }
.chat-panel__threads__item__time { font-size: 0.75em; color: var(--text-tertiary, #6b7280); margin-top: 2px; }

.chat-panel__messages {
    flex: 1;
    overflow-y: auto;
    padding: 16px;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.chat-panel__tools-banner {
    padding: 8px 12px;
    background: rgba(245, 158, 11, 0.1);
    border-left: 3px solid var(--warning, #f59e0b);
    border-radius: 4px;
    font-size: 0.85em;
    color: var(--text-tertiary, #6b7280);
}

.chat-panel__msg {
    max-width: 85%;
    padding: 10px 14px;
    border-radius: 12px;
    line-height: 1.5;
    word-wrap: break-word;
}
.chat-panel__msg--user {
    align-self: flex-end;
    background: var(--primary-color, #667eea);
    color: white;
}
.chat-panel__msg--assistant {
    align-self: flex-start;
    background: var(--bg-secondary, #f3f4f6);
    color: var(--text-primary, #1f2937);
}
.chat-panel__msg--thinking {
    align-self: flex-start;
    color: var(--text-tertiary, #6b7280);
    font-style: italic;
}
.chat-panel__msg pre,
.chat-panel__msg code {
    background: rgba(0,0,0,0.06);
    padding: 2px 4px;
    border-radius: 3px;
    font-family: ui-monospace, SFMono-Regular, monospace;
    font-size: 0.9em;
}

.chat-panel__input {
    display: flex;
    gap: 8px;
    padding: 12px 16px;
    border-top: 1px solid var(--border-primary, #e5e7eb);
}
.chat-panel__input textarea {
    flex: 1;
    padding: 10px 12px;
    border: 1px solid var(--border-primary, #d1d5db);
    border-radius: 8px;
    background: var(--bg-primary, #fff);
    color: var(--text-primary, #1f2937);
    resize: none;
    min-height: 38px;
    max-height: 120px;
    font-family: inherit;
    font-size: 0.95em;
}
.chat-panel__input button {
    background: var(--primary-color, #667eea);
    color: white;
    border: none;
    border-radius: 8px;
    padding: 0 16px;
    cursor: pointer;
    font-weight: 500;
}
.chat-panel__input button:disabled { opacity: 0.5; cursor: not-allowed; }

/* --- Responsive --- */
@media (max-width: 1023px) {
    .ai-settings-modal .modal-container { max-width: 90%; }
}
@media (max-width: 767px) {
    /* Mobile: chat takes near-full screen, anchored to bottom edge */
    .chat-panel {
        bottom: 80px;
        right: 8px;
        left: 8px;
        width: auto;
        height: calc(100vh - 100px);
    }
    .chat-panel__threads.is-expanded { width: 120px; }
    .chat-launcher-popover {
        bottom: 0;
        right: 0;
        left: 0;
        max-width: 100%;
        border-radius: 12px 12px 0 0;
    }
}