/* Sân khấu trình chiếu và lớp chuyển động cho prototype tiện ích Chrome.
 * Nối kit/motion.css (taste skill) với tokens.css, dựng khung trình duyệt, hình nền màn hình và
 * các chuyển động trả lời thao tác. Số đo chuyển động lấy từ references/motion.md. */

/* ---------- Cầu nối biến: kit/motion.css đọc --ink, --bg, --action... ---------- */
:root {
  --ink: var(--color-text);
  --bg: var(--color-surface);
  --card: var(--color-surface);
  --action: var(--color-brand);
  --action-ink: var(--color-on-brand);
  --line-strong: var(--color-border-strong);
  --s-2: var(--space-2);
  --r-btn: var(--radius-sm);
  --ease: var(--ease-out);
  --window-shadow: 0 1px 2px rgb(35 31 32 / .06), 0 24px 60px -24px rgb(35 31 32 / .28);
}
:root[data-theme="dark"] { --window-shadow: 0 1px 2px rgb(0 0 0 / .5), 0 28px 64px -24px rgb(0 0 0 / .8); }
@media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) { --window-shadow: 0 1px 2px rgb(0 0 0 / .5), 0 28px 64px -24px rgb(0 0 0 / .8); } }

/* ---------- Nền sân khấu: một quầng sáng đỏ nhạt sau cửa sổ (CSS ground kiểu halo) ---------- */
body {
  background:
    radial-gradient(70% 520px at 50% 120px, color-mix(in oklab, var(--color-brand) 9%, transparent), transparent 70%),
    var(--color-bg);
}
#stage { max-width: none; padding: var(--space-8) clamp(16px, 3vw, 56px) var(--space-12); }

/* ---------- Thanh trên: tab có thanh chỉ báo trượt ---------- */
.stage-bar { padding-block: 10px; }
.scene-tabs { position: relative; padding-bottom: 2px; }
.scene-tabs button[aria-selected="true"] { box-shadow: none; background: none; }
.scene-tabs button:hover { background: none; }
.tab-ind {
  position: absolute; left: 0; bottom: 0; height: 2px; width: 0; border-radius: 2px; background: var(--color-brand);
  transition: transform var(--m-slide) var(--m-ease-io), width var(--m-slide) var(--m-ease-io);
}
.tab-ind.is-jump { transition: none; }
.stage-title { padding-left: var(--space-3); border-left: 1px solid var(--color-border); }

/* ---------- Đầu mỗi cảnh: tiêu đề rõ, một dòng giải thích ---------- */
.scene-intro { display: flex; align-items: flex-end; justify-content: space-between; gap: var(--space-4) var(--space-8); flex-wrap: wrap; margin-bottom: var(--space-6); }
.scene-intro h2 { margin: 0 0 var(--space-2); font-size: clamp(24px, 1.2vw + 16px, 32px); line-height: 1.15; letter-spacing: -0.02em; font-weight: var(--weight-bold); max-width: 34ch; text-wrap: balance; }
.scene-intro p { margin: 0; max-width: 62ch; color: var(--color-text-muted); font-size: var(--text-md); }
.runs-on { display: inline-flex; align-items: center; gap: 10px; font-size: var(--text-sm); color: var(--color-text-muted); }
.runs-on img { display: block; }
.runs-on__text { color: var(--color-text-muted); }

.state-list { display: flex; flex-wrap: wrap; gap: var(--space-2); max-width: none; }
.state-list button { padding: 8px 14px; border-radius: var(--radius-full); font-size: var(--text-sm); }
.state-list button[aria-checked="true"] { box-shadow: none; background: var(--color-brand-soft); color: var(--color-brand-press); }
:root[data-theme="dark"] .state-list button[aria-checked="true"] { color: var(--red-300); }

/* ---------- Khung trình duyệt ---------- */
.browser {
  position: relative; background: var(--color-surface); border: 1px solid var(--color-border);
  border-radius: var(--radius-lg); box-shadow: var(--window-shadow);
}
.browser__top { display: flex; align-items: flex-end; gap: var(--space-4); height: 40px; padding: 0 var(--space-4); background: var(--color-surface-sunken); border-radius: var(--radius-lg) var(--radius-lg) 0 0; }
.browser__dots { display: inline-flex; gap: 7px; align-self: center; }
.browser__dots i { width: 11px; height: 11px; border-radius: 50%; background: var(--color-border-strong); }
.browser__tab {
  display: inline-flex; align-items: center; gap: var(--space-2); height: 32px; padding: 0 var(--space-4); max-width: 280px;
  background: var(--color-surface); border: 1px solid var(--color-border); border-bottom: 0; border-radius: 10px 10px 0 0;
  font-size: var(--text-xs); color: var(--color-text); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; margin-bottom: -1px;
}
.browser__bar { display: flex; align-items: center; gap: var(--space-3); padding: 8px var(--space-4); border-top: 1px solid var(--color-border); border-bottom: 1px solid var(--color-border); }
.browser__nav { color: var(--color-text-subtle); letter-spacing: 8px; font-size: var(--text-lg); line-height: 1; }
.browser__url { flex: 1; min-width: 0; padding: 6px 14px; border-radius: var(--radius-full); background: var(--color-surface-sunken); font-size: var(--text-sm); color: var(--color-text-subtle); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.browser__url span { color: var(--color-text); }
.browser__ext { position: relative; display: grid; place-items: center; width: 32px; height: 32px; border-radius: var(--radius-sm); --mark-size: 18px; }
.browser__ext.is-open { background: var(--color-brand-soft); }
.browser__badge {
  position: absolute; top: -3px; right: -5px; min-width: 16px; height: 16px; padding: 0 4px; border-radius: 8px;
  background: var(--color-brand); color: var(--color-on-brand); font-size: 11px; font-weight: var(--weight-semibold); line-height: 16px; text-align: center;
  box-shadow: 0 0 0 2px var(--color-surface);
}
.browser__badge.is-bump { animation: badge-bump 420ms var(--m-ease-enter); }
@keyframes badge-bump { 40% { transform: scale(1.3); } }

/* Gmail nằm trong khung: bỏ viền riêng của nó */
.browser .gmail { border: 0; border-radius: 0 0 var(--radius-lg) var(--radius-lg); }
.gmail-name { display: inline-flex; align-items: center; gap: var(--space-2); color: var(--color-text); }
.gmail-name small { font-size: var(--text-xs); font-weight: var(--weight-regular); color: var(--color-text-subtle); }
.gmail-body { min-height: 400px; }
.g-row { transition: background-color var(--m-out) var(--m-ease); }
.g-row.is-flash { background: var(--color-brand-soft); transition: background-color 1800ms var(--m-ease); }
.legend { margin-top: var(--space-5); }

/* ---------- Nền Gmail mờ sau khung soạn thư và popup ---------- */
.desk-backdrop { display: grid; grid-template-columns: 190px 1fr; min-height: 640px; border-radius: 0 0 var(--radius-lg) var(--radius-lg); overflow: hidden; opacity: .55; pointer-events: none; user-select: none; }
.bd-rail { display: grid; align-content: start; gap: 12px; padding: var(--space-5) var(--space-4); border-right: 1px solid var(--color-border); }
.bd-rail span { height: 10px; border-radius: 5px; background: var(--color-border); }
.bd-rail span:first-child { height: 40px; width: 70%; border-radius: var(--radius-md); }
.bd-row { display: grid; grid-template-columns: 170px 18px 1fr 60px; gap: var(--space-3); align-items: center; height: 44px; padding: 0 var(--space-4); border-bottom: 1px solid var(--color-border); font-size: var(--text-sm); color: var(--color-text-muted); --mark-size: 16px; }
.bd-row span { white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.bd-row b { color: var(--color-text); font-weight: var(--weight-semibold); }

/* ---------- Khung soạn thư nằm góc phải như Gmail thật ---------- */
.browser--compose { min-height: 780px; }
.browser--compose .desk-backdrop { min-height: 700px; }
.browser--compose .compose { position: absolute; right: var(--space-6); bottom: 0; width: min(640px, calc(100% - 48px)); margin: 0; box-shadow: 0 -4px 40px -12px rgb(35 31 32 / .35); }
.skip-links { display: flex; flex-wrap: wrap; align-items: center; gap: 6px var(--space-2); padding: 6px var(--space-4) 8px; background: var(--color-surface-sunken); font-size: var(--text-xs); color: var(--color-text-subtle); }
.skip-chip { display: inline-flex; align-items: center; gap: 5px; padding: 2px 8px; border-radius: var(--radius-full); background: var(--color-surface); border: 1px solid var(--color-border); color: var(--color-text-muted); }
.skip-chip img { display: block; }

/* ---------- Popup thả xuống từ biểu tượng etg.vn ---------- */
.browser--popup { min-height: 720px; }
.browser--popup .popup { position: absolute; top: 88px; right: var(--space-4); box-shadow: var(--shadow-dialog); }
.live-row { display: flex; align-items: center; gap: var(--space-2); padding: 8px var(--space-4); border-bottom: 1px solid var(--color-border); font-size: var(--text-xs); color: var(--color-text-muted); }
.live-row #liveLabel { flex: 1; }
.live-dot { position: relative; width: 8px; height: 8px; border-radius: 50%; background: var(--status-done); }
.live-dot::after { content: ""; position: absolute; inset: 0; border-radius: 50%; border: 2px solid var(--status-done); animation: live-ring 2.4s var(--m-ease) infinite; }
.live-row.is-paused .live-dot { background: var(--color-text-subtle); }
.live-row.is-paused .live-dot::after { animation: none; opacity: 0; }
@keyframes live-ring { from { transform: scale(1); opacity: .8; } to { transform: scale(2.6); opacity: 0; } }
.feed-item.is-new { animation: feed-in 320ms var(--m-ease-enter); background: color-mix(in oklab, var(--color-brand-soft) 70%, transparent); transition: background-color 2s var(--m-ease); }
.feed-item.is-new.is-lit { background: transparent; }
@keyframes feed-in { from { opacity: 0; transform: translateY(-8px); } }
.feed-item .etg-mark { transition: background-color 300ms var(--m-ease); }
.feed-item.is-lit .mark-wrap { animation: mark-pop 520ms var(--m-ease-enter); }

/* ---------- Nút tạm dừng: đĩa tròn 32px ---------- */
.pause-disc {
  position: absolute; right: 12px; bottom: 12px; z-index: 3; width: 32px; height: 32px; border-radius: 50%; border: 0; cursor: pointer;
  background: var(--color-surface-raised); color: var(--color-text); box-shadow: 0 1px 3px rgb(0 0 0 / .2);
  display: grid; place-items: center;
}
.pause-disc::before { content: ""; width: 10px; height: 12px; border-left: 3px solid currentColor; border-right: 3px solid currentColor; box-sizing: border-box; }
.pause-disc[aria-pressed="true"]::before { width: 0; height: 0; border: 0; border-left: 10px solid currentColor; border-top: 6px solid transparent; border-bottom: 6px solid transparent; margin-left: 3px; }
.pause-disc--sm { position: static; width: 26px; height: 26px; box-shadow: none; border: 1px solid var(--color-border); }
.pause-disc--sm::before { width: 8px; height: 10px; border-width: 0 2.5px; }
.pause-disc--sm[aria-pressed="true"]::before { border-left-width: 8px; border-top-width: 5px; border-bottom-width: 5px; }

/* ---------- Màn hình máy tính: hình nền lụa, thanh menu, thông báo góc phải trên ---------- */
.desktop { min-height: 560px; border: 1px solid var(--color-border); border-radius: var(--radius-lg); box-shadow: var(--window-shadow); background: #3a1414; isolation: isolate; }
:root[data-theme="dark"] .desktop { background: #1a0f10; }
.desktop__wall {
  position: absolute; inset: 0; z-index: 0; border-radius: inherit; overflow: hidden;
  /* ảnh tĩnh khi chưa có hoặc không có WebGL */
  background:
    radial-gradient(60% 80% at 80% 20%, #f08f8c, transparent 60%),
    radial-gradient(70% 90% at 15% 85%, #851c1b, transparent 65%),
    linear-gradient(135deg, #d0302e, #561211);
}
.desktop__menubar {
  position: relative; z-index: 1; display: flex; align-items: center; gap: var(--space-5); height: 30px; padding: 0 var(--space-4);
  background: rgb(255 255 255 / .55); backdrop-filter: blur(16px); color: var(--ink-900); font-size: var(--text-xs);
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
}
:root[data-theme="dark"] .desktop__menubar { background: rgb(23 20 21 / .6); color: var(--ink-100); }
.desktop__app { display: inline-flex; align-items: center; gap: 6px; font-weight: var(--weight-semibold); }
.desktop__clock { margin-left: auto; white-space: pre; }
.toast-stack { top: 46px; bottom: auto; right: var(--space-4); z-index: 2; }
.desktop-dnd { top: 46px; z-index: 2; }
.os-toast { border-radius: 16px; background: color-mix(in oklab, var(--color-surface-raised) 92%, transparent); backdrop-filter: blur(20px); animation: toast-in 360ms var(--m-ease-enter); }
@keyframes toast-in { from { opacity: 0; transform: translateX(24px) scale(.98); } }
.os-src { display: inline-flex; align-items: center; gap: 4px; }
.desktop .pause-disc { right: 16px; bottom: 16px; }

.stage-legal { margin: var(--space-10) 0 0; font-size: 13px; color: var(--color-text-subtle); max-width: 80ch; }

/* ---------- Chuyển động trả lời thao tác ---------- */
/* popover mở ra từ dấu ETG vừa chạm (transform-origin do JS đặt), đóng trong 120ms */
.popover { animation: none; }
.popover.is-opening { animation: pop-open var(--m-panel) var(--m-ease-enter); }
.popover.is-closing { opacity: 0; transform: scale(.98); transition: opacity var(--m-close) var(--m-ease), transform var(--m-close) var(--m-ease); }
@keyframes pop-open { from { opacity: 0; transform: scale(.96); } }
/* menu mẫu thư và nhắc lại bung lên từ nút của nó */
.tb-menu { transform-origin: 16px 100%; animation: menu-up var(--m-panel) var(--m-ease-enter); }
@keyframes menu-up { from { opacity: 0; transform: translateY(6px) scale(.98); } }
.dialog { animation: dialog-in 240ms var(--m-ease-enter); }
@keyframes dialog-in { from { opacity: 0; transform: translateY(8px) scale(.98); } }
.dialog-backdrop:not([hidden]) { animation: fade-in var(--m-panel) var(--m-ease); }
@keyframes fade-in { from { opacity: 0; } }
.snackbar { animation: snack-in 280ms var(--m-ease-enter); }
@keyframes snack-in { from { opacity: 0; transform: translateY(12px); } }

/* công tắc trong thanh công cụ: núm trượt và giãn 4px khi nhấn (motion.md, .m-switch) */
.switch-ui::after { transform-origin: 0 50%; transition: transform 180ms var(--m-ease); }
.switch:active .switch-ui::after { transform: scaleX(1.22); transition-duration: var(--m-press); }
.switch:active input:checked + .switch-ui::after { transform: translateX(9px) scaleX(1.22); }

/* thẻ chọn trạng thái popup và nút cảnh nhấc 2px khi rê (motion.md, card with a link) */
@media (hover: hover) and (pointer: fine) {
  .state-list button, .gmail-compose { transition: transform var(--m-out) var(--m-ease), border-color var(--m-out) var(--m-ease), box-shadow var(--m-out) var(--m-ease); }
  .state-list button:hover, .gmail-compose:hover { transform: translateY(var(--m-lift)); border-color: var(--color-border-strong); box-shadow: 0 14px 32px -18px rgb(35 31 32 / .35); transition-duration: 180ms; }
  .mark-btn { transition: background-color var(--m-out) var(--m-ease); }
  .mark-btn:hover .mark-wrap { transform: scale(1.12); }
  .mark-btn .mark-wrap { transition: transform var(--m-in) var(--m-ease); }
}
.m-link--bare { cursor: pointer; }

/* dấu ETG lóe khi có lượt mở mới: một vòng tỏa ra một lần */
.mark-btn { position: relative; }
.mark-btn.is-flash .mark-wrap { animation: mark-pop 620ms var(--m-ease-enter); }
.mark-btn.is-flash::after {
  content: ""; position: absolute; inset: 2px; border-radius: 6px; border: 2px solid var(--color-brand);
  animation: mark-ring 900ms var(--m-ease) forwards; pointer-events: none;
}
@keyframes mark-pop { 0% { transform: scale(1); } 35% { transform: scale(1.35); } 100% { transform: scale(1); } }
@keyframes mark-ring { from { transform: scale(.7); opacity: 1; } to { transform: scale(1.9); opacity: 0; } }

/* màn vào của mỗi cảnh, một lần: chữ lên 12px lần lượt, cửa sổ ổn định từ .98 */
.scene.is-entering .scene-intro > * { animation: rise-in 520ms var(--m-ease-enter) both; }
.scene.is-entering .scene-intro > *:nth-child(2) { animation-delay: 60ms; }
.scene.is-entering [data-window] { animation: settle-in 900ms var(--m-ease-enter) both; animation-delay: 120ms; }
.scene.is-entering .legend { animation: rise-in 520ms var(--m-ease-enter) both; animation-delay: 300ms; }
@keyframes rise-in { from { opacity: 0; transform: translateY(12px); } }
@keyframes settle-in { from { opacity: 0; transform: scale(.98); } }

@media (prefers-reduced-motion: reduce) {
  .scene.is-entering *, .popover.is-opening, .tb-menu, .dialog, .snackbar, .os-toast, .feed-item.is-new, .mark-btn.is-flash .mark-wrap { animation: none !important; }
  .mark-btn.is-flash::after, .live-dot::after { display: none; }
  .tab-ind, .switch-ui::after { transition: none; }
  .switch:active .switch-ui::after { transform: none; }
  .switch:active input:checked + .switch-ui::after { transform: translateX(12px); }
}

/* ---------- Màn hình hẹp ---------- */
@media (max-width: 900px) {
  .browser--popup .popup { position: relative; top: auto; right: auto; margin: var(--space-4) auto; }
  .browser--popup .desk-backdrop { display: none; }
  .browser--popup { min-height: 0; padding-bottom: 1px; }
}
@media (max-width: 720px) {
  #stage { padding: var(--space-5) var(--space-4) var(--space-10); }
  .stage-title { display: none; }
  .scene-intro { margin-bottom: var(--space-4); }
  .scene-intro p { font-size: var(--text-sm); }
  .browser__url { font-size: var(--text-xs); }
  .browser__tab { max-width: 180px; }
  .browser--compose { min-height: 0; }
  .browser--compose .desk-backdrop { display: none; }
  .browser--compose .compose { position: relative; right: auto; width: 100%; box-shadow: none; border-left: 0; border-right: 0; }
  .desktop { min-height: 520px; }
  .desktop__menubar > span:not(.desktop__app):not(.desktop__clock) { display: none; }
  .desktop__clock { font-size: 11px; }
  .toast-stack { left: var(--space-3); right: var(--space-3); width: auto; }
}