/*
 * Demo-mode styles for Paper Assistant.
 *
 * Sample-paper picker modal shown when DEMO_MODE is on, plus tweaks to
 * the chat panel's empty-state copy used to describe the live chat
 * feature.
 */

/* ── Demo Picker ─────────────────────────────────────────────────────── */
/* Shell (backdrop/box/header/close) comes from modal.css; the picker adds
   a scrollable-list layout on top of the base centred box. */

.demo-picker__box {
    width: min(560px, 90vw);
    max-height: 80vh;
    display: flex;
    flex-direction: column;
}

.demo-picker__header {
    background: var(--overlay-border, #0055AA);
    flex-shrink: 0;
}

.demo-picker__body {
    overflow-y: auto;
    padding: 8px 0;
}

.demo-picker__list {
    list-style: none;
    margin: 0;
    padding: 0;
}

.demo-picker__item {
    display: block;
    width: 100%;
    text-align: left;
    background: none;
    border: none;
    padding: 12px 16px;
    cursor: pointer;
    font-family: var(--font-family);
    color: var(--toolbar-fg, #333);
    border-bottom: 1px solid var(--toolbar-sep-color, #eee);
}

.demo-picker__item:last-child {
    border-bottom: none;
}

.demo-picker__item:hover {
    background: var(--toolbar-btn-active, #f0f0f0);
}

.demo-picker__item-title {
    display: block;
    font-weight: 600;
    font-size: 13px;
    margin-bottom: 2px;
}

.demo-picker__item-description {
    display: block;
    font-size: 12px;
    color: var(--dialog-muted-fg, #666);
    line-height: 1.4;
}

.demo-picker__loading,
.demo-picker__empty,
.demo-picker__error {
    padding: 20px 16px;
    text-align: center;
    color: var(--dialog-muted-fg, #666);
    font-size: 13px;
}

.demo-picker__error {
    color: var(--dialog-error-bg, #dc3545);
}

/* ── License legend (CC BY attribution links) ───────────────────────── */

.demo-picker__legend {
    list-style: none;
    margin: 0;
    padding: 10px 16px 12px;
    border-top: 1px solid var(--toolbar-sep-color, #eee);
    font-size: 11px;
    color: var(--dialog-muted-fg, #666);
    line-height: 1.5;
}

.demo-picker__legend:empty {
    display: none;
}

.demo-picker__legend-item {
    display: block;
}

.demo-picker__legend-marker {
    display: inline-block;
    min-width: 1.5em;
    font-weight: 600;
    color: var(--toolbar-fg, #333);
}

.demo-picker__legend a {
    color: var(--overlay-border, #0055AA);
    text-decoration: none;
}

.demo-picker__legend a:hover {
    text-decoration: underline;
}

/* ── Chat panel demo description ─────────────────────────────────────── */

.chat-panel__empty--demo {
    text-align: left;
    padding: 16px 20px;
    line-height: 1.5;
}

.chat-panel__empty--demo strong {
    display: block;
    margin-bottom: 6px;
    color: var(--toolbar-fg);
    font-size: 11pt;
}

/* ── Demo hint tooltips ──────────────────────────────────────────────── */
/* Small, always-present, non-blocking cards that replace the live
   coach-mark tour in demo mode (see demo_hints.js). Deliberately lighter
   than the tutorial's coach-mark card: smaller, softer shadow, and no
   backdrop/spotlight so the user can interact with everything underneath.
   Sits below the live tutorial layer (z-index 9000) but above app UI. */

.demo-hint {
    position: fixed;
    z-index: 8500;
    max-width: 220px;
    box-sizing: border-box;
    display: flex;
    align-items: flex-start;
    gap: 8px;
    padding: 8px 10px;
    background: #ffffff;
    border: 1px solid var(--toolbar-sep-color, #ddd);
    border-left: 3px solid var(--overlay-border, #0055AA);
    border-radius: 6px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.18);
    font-family: var(--font-family);
    font-size: var(--dialog-font-small, 9pt);
    line-height: 1.4;
    color: var(--toolbar-fg, #333);
    cursor: pointer;
    pointer-events: auto;
    opacity: 1;
    transition: opacity 0.15s ease;
    animation: demo-hint-in 0.18s ease;
}

@keyframes demo-hint-in {
    from { opacity: 0; transform: translateY(4px); }
    to { opacity: 1; transform: translateY(0); }
}

.demo-hint--leaving {
    opacity: 0;
}

/* Arrow pointing at the anchored element: a stem (::before) plus an
   arrowhead (::after), both accent blue and long enough to visibly connect
   the card to its target (----> rather than a lone >). Position along the
   card edge comes from --demo-hint-arrow-x/y (set in JS from the anchor's
   centre), defaulting to the middle, so it keeps pointing at the anchor even
   when the card is nudged. The 18px length matches the card-to-anchor gap. */
.demo-hint::before,
.demo-hint::after {
    content: "";
    position: absolute;
}

.demo-hint::before {   /* stem */
    background: var(--overlay-border, #0055AA);
}

.demo-hint::after {    /* arrowhead */
    width: 0;
    height: 0;
    border-style: solid;
    border-color: transparent;
}

/* The stem length (and arrowhead offset) follow --demo-hint-arrow-len, set
   in JS to the real gap between card and anchor: a short ">" up close, a
   long "<-----" when the card is pushed well clear. The 8px is the head. */

/* card BELOW anchor — arrow points up */
.demo-hint--bottom::before {
    bottom: 100%;
    left: var(--demo-hint-arrow-x, 50%);
    transform: translateX(-50%);
    width: 2px;
    height: var(--demo-hint-arrow-len, 18px);
}
.demo-hint--bottom::after {
    bottom: calc(100% + var(--demo-hint-arrow-len, 18px) - 8px);
    left: var(--demo-hint-arrow-x, 50%);
    transform: translateX(-50%);
    border-width: 0 4px 8px 4px;
    border-bottom-color: var(--overlay-border, #0055AA);
}

/* card ABOVE anchor — arrow points down */
.demo-hint--top::before {
    top: 100%;
    left: var(--demo-hint-arrow-x, 50%);
    transform: translateX(-50%);
    width: 2px;
    height: var(--demo-hint-arrow-len, 18px);
}
.demo-hint--top::after {
    top: calc(100% + var(--demo-hint-arrow-len, 18px) - 8px);
    left: var(--demo-hint-arrow-x, 50%);
    transform: translateX(-50%);
    border-width: 8px 4px 0 4px;
    border-top-color: var(--overlay-border, #0055AA);
}

/* card LEFT of anchor — arrow points right */
.demo-hint--left::before {
    left: 100%;
    top: var(--demo-hint-arrow-y, 50%);
    transform: translateY(-50%);
    width: var(--demo-hint-arrow-len, 18px);
    height: 2px;
}
.demo-hint--left::after {
    left: calc(100% + var(--demo-hint-arrow-len, 18px) - 8px);
    top: var(--demo-hint-arrow-y, 50%);
    transform: translateY(-50%);
    border-width: 4px 0 4px 8px;
    border-left-color: var(--overlay-border, #0055AA);
}

/* card RIGHT of anchor — arrow points left */
.demo-hint--right::before {
    right: 100%;
    top: var(--demo-hint-arrow-y, 50%);
    transform: translateY(-50%);
    width: var(--demo-hint-arrow-len, 18px);
    height: 2px;
}
.demo-hint--right::after {
    right: calc(100% + var(--demo-hint-arrow-len, 18px) - 8px);
    top: var(--demo-hint-arrow-y, 50%);
    transform: translateY(-50%);
    border-width: 4px 8px 4px 0;
    border-right-color: var(--overlay-border, #0055AA);
}

/* Large centred "loading a paper" card shown before the paper opens. No
   anchor, no arrow. */
.demo-hint--loading {
    display: block;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    max-width: 360px;
    padding: 16px 22px;
    font-size: 12pt;
    font-weight: 500;
    text-align: center;
    cursor: default;
    animation: none;
}

.demo-hint--loading::before,
.demo-hint--loading::after {
    display: none;
}

.demo-hint__text {
    flex: 1;
}

.demo-hint__dismiss {
    flex-shrink: 0;
    color: var(--dialog-muted-fg, #666);
    font-size: 13px;
    line-height: 1;
    margin-top: 1px;
}

.demo-hint:hover .demo-hint__dismiss {
    color: var(--toolbar-fg, #333);
}

@media (prefers-reduced-motion: reduce) {
    .demo-hint {
        animation: none;
        transition: none;
    }
}