/* ════════════════════════════════════════════════════════════════
   Communication widget — Phase 18C
   Quiet floating launcher + compact panel on the public storefront.
   Token-derived (--erp-* via theme --vbk-* bridge), RTL-native,
   z-index 240: below the mobile nav overlay (250) and the side-cart
   (290/295) — the cart always wins.
   ════════════════════════════════════════════════════════════════ */

.erp-comm {
	position: fixed;
	bottom: calc(16px + env(safe-area-inset-bottom, 0px));
	z-index: 240;
	font-family: inherit;
}
.erp-comm--right { inset-inline-start: 16px; } /* inline-start = physical right in RTL */
.erp-comm--left  { inset-inline-end: 16px; }

/* The `hidden` attribute loses to any explicit `display` — without this
   guard the panel/footer render on every page load and the launcher can
   never visually close the panel. Scoped so theme/UA rules stay intact. */
.erp-comm [hidden] { display: none !important; }

@media (min-width: 768px) {
	.erp-comm { bottom: calc(24px + env(safe-area-inset-bottom, 0px)); }
	.erp-comm--right { inset-inline-start: 24px; }
	.erp-comm--left  { inset-inline-end: 24px; }
}

/* ── Launcher — compact pill, not a chatbot bubble ─────────────────────── */

.erp-comm-launcher {
	display: inline-flex;
	align-items: center;
	gap: 8px;
	position: relative;
	padding: 10px 16px;
	background: var(--erp-color-surface, #FFFFFF);
	color: var(--erp-color-text, #0F172A);
	border: 1px solid var(--erp-color-border, #E2E8F0);
	border-radius: var(--erp-radius-full, 999px);
	box-shadow: var(--erp-shadow-dropdown, 0 8px 32px -8px rgba(15,23,42,.14));
	font: inherit;
	font-size: var(--erp-font-size-sm, 0.875rem);
	font-weight: 600;
	cursor: pointer;
	transition: border-color .2s ease, color .2s ease;
}
.erp-comm-launcher:hover,
.erp-comm-launcher:focus-visible {
	border-color: var(--erp-color-accent, #0369A1);
	color: var(--erp-color-accent, #0369A1);
}
.erp-comm-launcher:focus-visible {
	outline: 2px solid var(--erp-color-accent, #0369A1);
	outline-offset: 2px;
}
.erp-comm-launcher-icon { flex-shrink: 0; }
.erp-comm-dot {
	position: absolute;
	top: 8px;
	inset-inline-start: 14px;
	width: 8px;
	height: 8px;
	border-radius: 50%;
	background: var(--erp-color-accent, #0369A1);
}

/* ── Panel — anchored above the launcher; ≤640px becomes a bottom sheet ── */

.erp-comm-panel {
	position: absolute;
	bottom: calc(100% + 10px);
	inset-inline-start: 0;
	width: min(380px, calc(100vw - 32px));
	max-height: min(600px, calc(100dvh - 96px));
	display: flex;
	flex-direction: column;
	background: var(--erp-color-surface, #FFFFFF);
	border: 1px solid var(--erp-color-border, #E2E8F0);
	border-radius: var(--erp-radius-modal, 18px);
	box-shadow: var(--erp-shadow-dropdown, 0 8px 32px -8px rgba(15,23,42,.14));
	overflow: hidden;
}
@media (max-width: 640px) {
	.erp-comm-panel {
		position: fixed;
		bottom: 0;
		left: 0;
		right: 0;  /* physical edges — a full-width sheet must not depend on logical resolution */
		width: auto;
		max-height: calc(100dvh - 64px);
		border-radius: var(--erp-radius-modal, 18px) var(--erp-radius-modal, 18px) 0 0;
		padding-bottom: env(safe-area-inset-bottom, 0px);
	}
	/* The sheet owns the bottom edge — the launcher must not float over it. */
	.erp-comm:has(.erp-comm-panel:not([hidden])) .erp-comm-launcher { display: none; }
}

.erp-comm-head {
	display: flex;
	align-items: center;
	justify-content: space-between;
	gap: 12px;
	padding: 14px 16px;
	border-bottom: 1px solid var(--erp-color-border, #E2E8F0);
	background: var(--erp-color-surface-alt, #F8FAFC);
}
.erp-comm-head-text { display: flex; flex-direction: column; gap: 2px; min-width: 0; }
.erp-comm-title {
	font-size: var(--erp-font-size-sm, 0.875rem);
	font-weight: 700;
	color: var(--erp-color-text, #0F172A);
}
.erp-comm-sub {
	font-size: var(--erp-font-size-xs, 0.75rem);
	color: var(--erp-color-text-subtle, #94A3B8);
}
.erp-comm-close {
	display: flex;
	align-items: center;
	justify-content: center;
	width: 32px;
	height: 32px;
	padding: 0;
	background: transparent;
	border: 0;
	border-radius: var(--erp-radius-control, 10px);
	color: var(--erp-color-text-muted, #475569);
	cursor: pointer;
}
.erp-comm-close:hover { color: var(--erp-color-accent, #0369A1); }
.erp-comm-close:focus-visible { outline: 2px solid var(--erp-color-accent, #0369A1); outline-offset: 2px; }

/* ── Status line (escalation / resolve / error copy) ───────────────────── */

.erp-comm-status {
	padding: 8px 16px;
	font-size: var(--erp-font-size-xs, 0.75rem);
	color: var(--erp-color-text-muted, #475569);
	background: var(--erp-color-surface-alt, #F8FAFC);
	border-bottom: 1px solid var(--erp-color-border, #E2E8F0);
}

/* ── Message list ──────────────────────────────────────────────────────── */

.erp-comm-body {
	flex: 1;
	overflow-y: auto;
	display: flex;
	flex-direction: column;
	gap: 8px;
	padding: 14px 16px;
	min-height: 120px;
}

.erp-comm-msg { display: flex; }
.erp-comm-msg--customer { justify-content: flex-start; }   /* inline-start = right in RTL */
.erp-comm-msg--agent,
.erp-comm-msg--ai { justify-content: flex-end; }
.erp-comm-msg--system { justify-content: center; }

.erp-comm-bubble {
	max-width: 82%;
	padding: 8px 12px;
	border-radius: var(--erp-radius-card, 14px);
	font-size: var(--erp-font-size-sm, 0.875rem);
	line-height: 1.6;
	word-break: break-word;
}
.erp-comm-msg--customer .erp-comm-bubble {
	background: var(--erp-color-accent, #0369A1);
	color: var(--erp-color-text-inverse, #FFFFFF);
	border-end-start-radius: 4px;
}
.erp-comm-msg--agent .erp-comm-bubble,
.erp-comm-msg--ai .erp-comm-bubble {
	background: var(--erp-color-surface-alt, #F1F5F9);
	color: var(--erp-color-text, #0F172A);
	border-end-end-radius: 4px;
}
.erp-comm-msg--system .erp-comm-bubble {
	background: transparent;
	color: var(--erp-color-text-subtle, #94A3B8);
	font-size: var(--erp-font-size-xs, 0.75rem);
	padding: 2px 8px;
	text-align: center;
}
.erp-comm-who {
	display: block;
	font-size: var(--erp-font-size-xs, 0.75rem);
	font-weight: 600;
	opacity: .75;
	margin-bottom: 2px;
}
.erp-comm-msg--system .erp-comm-who { display: none; }
.erp-comm-who:empty { display: none; }
.erp-comm-time {
	display: block;
	font-size: 0.68rem;
	opacity: .65;
	margin-top: 3px;
	direction: ltr;
	text-align: end;
}
.erp-comm-msg.is-pending .erp-comm-bubble { opacity: .7; }
.erp-comm-msg.is-failed .erp-comm-bubble { border: 1px dashed var(--erp-color-danger, #DC2626); }

/* AI typing indicator (C52-I) — assistant-side bubble, shown only while
   a real AI turn is pending; removed on reply / escalation / stall. */
.erp-comm-msg--typing .erp-comm-bubble { display: inline-flex; align-items: center; gap: 8px; }
.erp-comm-msg--typing .erp-comm-who { margin-bottom: 0; }
.erp-comm-typing-dots { display: inline-flex; align-items: center; gap: 4px; }
.erp-comm-typing-dots i {
	width: 6px;
	height: 6px;
	border-radius: 50%;
	background: currentColor;
	opacity: .35;
	animation: erp-comm-typing 1.2s ease-in-out infinite;
}
.erp-comm-typing-dots i:nth-child(2) { animation-delay: .15s; }
.erp-comm-typing-dots i:nth-child(3) { animation-delay: .3s; }
@keyframes erp-comm-typing {
	0%, 60%, 100% { opacity: .35; transform: translateY(0); }
	30% { opacity: 1; transform: translateY(-2px); }
}
.erp-comm-typing-label {
	font-size: var(--erp-font-size-xs, 0.75rem);
	opacity: .75;
	white-space: nowrap;
}
@media (prefers-reduced-motion: reduce) {
	.erp-comm-typing-dots i { animation: none; opacity: .6; }
}
.erp-comm-retry {
	font: inherit;
	font-size: 0.68rem;
	color: var(--erp-color-danger, #DC2626);
	background: none;
	border: 0;
	padding: 0;
	cursor: pointer;
	text-decoration: underline;
}

.erp-comm-older {
	align-self: center;
	font: inherit;
	font-size: var(--erp-font-size-xs, 0.75rem);
	color: var(--erp-color-accent, #0369A1);
	background: none;
	border: 0;
	padding: 4px 8px;
	cursor: pointer;
}

/* ── Empty state — quiet guidance chips ────────────────────────────────── */

.erp-comm-empty { text-align: center; padding: 8px 0; }
.erp-comm-empty-title {
	margin: 0 0 10px;
	font-size: var(--erp-font-size-sm, 0.875rem);
	font-weight: 600;
	color: var(--erp-color-text, #0F172A);
}
.erp-comm-chip {
	display: block;
	width: 100%;
	margin-top: 6px;
	padding: 8px 12px;
	font: inherit;
	font-size: var(--erp-font-size-sm, 0.875rem);
	text-align: start;
	color: var(--erp-color-text-muted, #475569);
	background: var(--erp-color-surface-alt, #F8FAFC);
	border: 1px solid var(--erp-color-border, #E2E8F0);
	border-radius: var(--erp-radius-control, 10px);
	cursor: pointer;
	transition: border-color .2s ease, color .2s ease;
}
.erp-comm-chip:hover,
.erp-comm-chip:focus-visible {
	border-color: var(--erp-color-accent, #0369A1);
	color: var(--erp-color-accent, #0369A1);
}

/* ── Escalation contact row (compact fields — never a modal) ───────────── */

.erp-comm-escalate {
	padding: 10px 16px;
	border-top: 1px solid var(--erp-color-border, #E2E8F0);
	background: var(--erp-color-surface-alt, #F8FAFC);
}
.erp-comm-escalate-note {
	margin: 0 0 8px;
	font-size: var(--erp-font-size-xs, 0.75rem);
	color: var(--erp-color-text-muted, #475569);
	line-height: 1.6;
}
.erp-comm-escalate .erp-comm-input { margin-top: 6px; }
.erp-comm-escalate-row { display: flex; gap: 8px; margin-top: 8px; }

.erp-comm-btn {
	padding: 8px 14px;
	font: inherit;
	font-size: var(--erp-font-size-sm, 0.875rem);
	font-weight: 600;
	border-radius: var(--erp-radius-control, 10px);
	cursor: pointer;
}
.erp-comm-btn--primary {
	background: var(--erp-color-accent, #0369A1);
	color: var(--erp-color-text-inverse, #FFFFFF);
	border: 1px solid var(--erp-color-accent, #0369A1);
}
.erp-comm-btn--primary:hover { background: var(--erp-color-accent-hover, #075985); }
.erp-comm-btn--ghost {
	background: transparent;
	color: var(--erp-color-text-muted, #475569);
	border: 1px solid var(--erp-color-border, #E2E8F0);
}

/* ── Composer ──────────────────────────────────────────────────────────── */

.erp-comm-composer {
	display: flex;
	align-items: flex-end;
	gap: 8px;
	padding: 10px 12px;
	border-top: 1px solid var(--erp-color-border, #E2E8F0);
}
.erp-comm-input {
	flex: 1;
	min-width: 0;
	padding: 8px 12px;
	font: inherit;
	font-size: var(--erp-font-size-sm, 0.875rem);
	color: var(--erp-color-text, #0F172A);
	background: var(--erp-color-surface, #FFFFFF);
	border: 1px solid var(--erp-color-border, #E2E8F0);
	border-radius: var(--erp-radius-control, 10px);
}
.erp-comm-input:focus-visible {
	outline: 2px solid var(--erp-color-accent, #0369A1);
	outline-offset: -1px;
	border-color: var(--erp-color-accent, #0369A1);
}
.erp-comm-textarea {
	resize: none;
	max-height: 110px;
	line-height: 1.6;
}
.erp-comm-send {
	display: flex;
	align-items: center;
	justify-content: center;
	width: 38px;
	height: 38px;
	flex-shrink: 0;
	padding: 0;
	border: 0;
	border-radius: var(--erp-radius-control, 10px);
	background: var(--erp-color-accent, #0369A1);
	color: var(--erp-color-text-inverse, #FFFFFF);
	cursor: pointer;
	transition: background .2s ease;
}
.erp-comm-send:hover { background: var(--erp-color-accent-hover, #075985); }
.erp-comm-send:focus-visible { outline: 2px solid var(--erp-color-accent, #0369A1); outline-offset: 2px; }
[dir="rtl"] .erp-comm-send-icon { transform: scaleX(-1); }

.erp-comm-composer.is-disabled { opacity: .55; }

/* ── Footer actions ────────────────────────────────────────────────────── */

.erp-comm-foot {
	display: flex;
	justify-content: space-between;
	gap: 8px;
	padding: 8px 16px;
	border-top: 1px solid var(--erp-color-border, #E2E8F0);
}
.erp-comm-footlink {
	font: inherit;
	font-size: var(--erp-font-size-xs, 0.75rem);
	font-weight: 600;
	color: var(--erp-color-text-muted, #475569);
	background: none;
	border: 0;
	padding: 4px 2px;
	cursor: pointer;
}
.erp-comm-footlink:hover,
.erp-comm-footlink:focus-visible { color: var(--erp-color-accent, #0369A1); }

/* ── Escalation consent row (Phase 18E.1) ──────────────────────────────── */

.erp-comm-consent {
	display: flex;
	gap: 8px;
	padding: 10px 16px;
	border-top: 1px solid var(--erp-color-border, #E2E8F0);
	background: var(--erp-color-surface-alt, #F8FAFC);
}
.erp-comm-consent .erp-comm-btn { flex: 1; text-align: center; }
.erp-comm-btn:focus-visible,
.erp-comm-consent .erp-comm-btn:focus-visible {
	outline: 2px solid var(--erp-color-accent, #0369A1);
	outline-offset: 2px;
}
.erp-comm-btn:disabled { opacity: .6; cursor: default; }

/* ── Product cards inside AI bubbles (Phase 18E.1) ─────────────────────── */

.erp-comm-products {
	display: flex;
	flex-direction: column;
	gap: 8px;
	margin-top: 8px;
}
.erp-comm-product {
	display: flex;
	flex-wrap: wrap;
	align-items: center;
	gap: 10px;
	padding: 8px;
	background: var(--erp-color-surface, #FFFFFF);
	border: 1px solid var(--erp-color-border, #E2E8F0);
	border-radius: var(--erp-radius-card, 14px);
}
.erp-comm-product-img {
	width: 44px;
	height: 44px;
	object-fit: cover;
	border-radius: var(--erp-radius-control, 10px);
	flex-shrink: 0;
}
.erp-comm-product-info {
	display: flex;
	flex-direction: column;
	gap: 2px;
	min-width: 0;
	flex: 1;
}
.erp-comm-product-title {
	font-size: var(--erp-font-size-xs, 0.75rem);
	font-weight: 600;
	color: var(--erp-color-text, #0F172A);
	text-decoration: none;
	line-height: 1.5;
}
.erp-comm-product-title:hover,
.erp-comm-product-title:focus-visible { color: var(--erp-color-accent, #0369A1); }
.erp-comm-product-stock {
	font-size: 0.68rem;
	font-weight: 600;
	color: var(--erp-color-success, #15803D);
}
.erp-comm-product-stock.is-out { color: var(--erp-color-text-subtle, #94A3B8); }
.erp-comm-product-price {
	font-size: var(--erp-font-size-xs, 0.75rem);
	font-weight: 700;
	color: var(--erp-color-text, #0F172A);
}
.erp-comm-product-actions {
	display: flex;
	gap: 6px;
	flex-basis: 100%;
}
.erp-comm-product-actions .erp-comm-btn {
	flex: 1;
	padding: 6px 10px;
	font-size: var(--erp-font-size-xs, 0.75rem);
	text-align: center;
	text-decoration: none;
	display: inline-flex;
	align-items: center;
	justify-content: center;
}
.erp-comm-product-add.is-added { opacity: .8; }
.erp-comm-product-add.is-added::after { content: " ✓"; }

/* ── Screen-reader helper ──────────────────────────────────────────────── */

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

/* ── Reduced motion ────────────────────────────────────────────────────── */

@media (prefers-reduced-motion: reduce) {
	.erp-comm-launcher,
	.erp-comm-chip,
	.erp-comm-send { transition: none; }
}