/* ==========================================================================
   FTEL Minigame Design System — Components
   Phụ thuộc: ../tokens/tokens.css
   Quy ước tên: .ds-<component>  ·  biến thể: .ds-<component>--<variant>
   Mọi kích thước đi qua token → tự co giãn theo [data-platform].
   ========================================================================== */

/* ---------- Base ---------- */
*, *::before, *::after { box-sizing: border-box; }
.ds-root, body.ds-root {
  margin: 0;
  font-family: var(--ds-font-body);
  font-size: var(--ds-fs-body);
  line-height: var(--ds-lh-body);
  color: var(--ds-text);
  background: var(--ds-surface);
  -webkit-font-smoothing: antialiased;
  -webkit-tap-highlight-color: transparent;
}
:where(.ds-root) :focus-visible { outline: 3px solid var(--ds-focus-ring); outline-offset: 2px; }

/* ---------- Typography ---------- */
.ds-display, .ds-h1, .ds-h2, .ds-h3, .ds-sub1, .ds-sub2 { font-family: var(--ds-font-display); font-weight: 700; margin: 0; text-wrap: balance; }
.ds-display { font-size: var(--ds-fs-display); line-height: var(--ds-lh-display); }
.ds-h1 { font-size: var(--ds-fs-h1); line-height: var(--ds-lh-h1); }
.ds-h2 { font-size: var(--ds-fs-h2); line-height: var(--ds-lh-h2); letter-spacing: var(--ds-tracking-heading); }
.ds-h3 { font-size: var(--ds-fs-h3); line-height: var(--ds-lh-h3); letter-spacing: var(--ds-tracking-heading); }
.ds-sub1 { font-size: var(--ds-fs-sub1); line-height: var(--ds-lh-sub1); font-weight: 600; }
.ds-sub2 { font-size: var(--ds-fs-sub2); line-height: var(--ds-lh-sub2); text-transform: uppercase; letter-spacing: .04em; }
.ds-body { font-size: var(--ds-fs-body); line-height: var(--ds-lh-body); margin: 0; }
.ds-body-sm { font-size: var(--ds-fs-body-sm); line-height: var(--ds-lh-body-sm); margin: 0; }
.ds-caption { font-size: var(--ds-fs-caption); line-height: var(--ds-lh-caption); color: var(--ds-text-secondary); margin: 0; }
.ds-long { letter-spacing: var(--ds-tracking-long); }
.ds-text-brand { color: var(--ds-brand-ink); }
.ds-text-inverse { color: var(--ds-text-inverse); }
.ds-link { color: var(--ds-text-link); font-weight: 600; text-underline-offset: 3px; }
.ds-num { font-family: var(--ds-font-number); font-variant-numeric: tabular-nums; }

/* ---------- Button ----------
   primary   : gradient cam — 1 nút/màn hình (CTA chính: Chơi ngay, Nhận quà)
   secondary : xanh Blue Crayola — hành động phụ quan trọng
   outline   : viền — hành động phụ
   ghost     : chữ — huỷ, bỏ qua
   inverse   : nền trắng, đặt trên nền cam/ảnh                                   */
.ds-btn {
  --_h: var(--ds-control-h-md);
  display: inline-flex; align-items: center; justify-content: center; gap: .5em;
  min-height: max(var(--_h), var(--ds-touch-min)); min-width: var(--ds-touch-min);
  padding: 0 calc(var(--_h) * .5);
  border: 0; border-radius: var(--ds-radius-pill);
  font-family: var(--ds-font-display); font-weight: 700; font-size: var(--ds-fs-button); line-height: 1;
  text-decoration: none; cursor: pointer; user-select: none;
  transition: transform var(--ds-dur-fast) var(--ds-ease-standard), box-shadow var(--ds-dur-base) var(--ds-ease-standard), filter var(--ds-dur-fast);
}
.ds-btn:active { transform: scale(.96); }
.ds-btn--sm { --_h: var(--ds-control-h-sm); font-size: calc(var(--ds-fs-button) * .85); }
.ds-btn--lg { --_h: var(--ds-control-h-lg); font-size: calc(var(--ds-fs-button) * 1.15); }
.ds-btn--block { display: flex; width: 100%; }
.ds-btn--primary { background: var(--ds-action-primary-bg); color: var(--ds-action-primary-fg); box-shadow: var(--ds-shadow-cta); text-shadow: 0 1px 1px rgba(160, 50, 0, .35); }
.ds-btn--primary:hover { filter: brightness(1.04); }
.ds-btn--secondary { background: var(--ds-action-secondary-bg); color: var(--ds-action-secondary-fg); }
.ds-btn--outline { background: transparent; color: var(--ds-brand-ink); box-shadow: inset 0 0 0 2px currentColor; }
.ds-btn--ghost { background: transparent; color: var(--ds-text-secondary); }
.ds-btn--inverse { background: var(--ftel-white); color: var(--ds-brand-ink); box-shadow: var(--ds-shadow-md); }
.ds-btn:disabled, .ds-btn[aria-disabled="true"] { background: var(--ds-action-disabled-bg); color: var(--ds-action-disabled-fg); box-shadow: none; text-shadow: none; cursor: not-allowed; transform: none; }
.ds-btn--icon { padding: 0; width: max(var(--_h), var(--ds-touch-min)); }
.ds-btn svg { width: 1.2em; height: 1.2em; flex: none; }

/* Nút "bit" — nghiêng 13°, dùng cho CTA game nổi bật (Chơi ngay / Quay) */
.ds-btn--bit { border-radius: var(--ds-radius-md); transform: skewX(var(--ftel-skew)); }
.ds-btn--bit > * { transform: skewX(var(--ftel-skew-inverse)); display: inline-block; }
.ds-btn--bit:active { transform: skewX(var(--ftel-skew)) scale(.96); }

/* ---------- Section tag — motif tiêu đề của brand book: [01] ( Tiêu đề ) ---------- */
.ds-tag { display: inline-flex; align-items: center; gap: var(--ds-space-2); }
.ds-tag__num {
  display: inline-grid; place-items: center; min-width: 2.2em; height: 2em; padding: 0 .4em;
  font-family: var(--ds-font-display); font-size: var(--ds-fs-h3); color: var(--ds-brand);
  border: 2px solid var(--ds-brand); border-radius: var(--ds-radius-sm);
  transform: skewX(var(--ftel-skew));
}
.ds-tag__num > span { transform: skewX(var(--ftel-skew-inverse)); }
.ds-tag__label {
  display: inline-flex; align-items: center; min-height: 2em; padding: 0 1.2em;
  background: var(--ds-brand-strong); color: var(--ds-on-brand);
  font-family: var(--ds-font-display); font-weight: 700; font-size: var(--ds-fs-sub1);
  border-radius: var(--ds-radius-pill) var(--ds-radius-pill) var(--ds-radius-pill) 4px;
}

/* ---------- Badge (bit) — nhãn nhỏ nghiêng: MỚI, x2, HOT ---------- */
.ds-badge {
  display: inline-flex; align-items: center; padding: .2em .7em;
  font-family: var(--ds-font-display); font-weight: 700; font-size: var(--ds-fs-caption); line-height: 1.3;
  text-transform: uppercase; letter-spacing: .03em;
  background: var(--ds-brand-strong); color: var(--ftel-white);
  border-radius: var(--ds-radius-xs); transform: skewX(var(--ftel-skew));
}
.ds-badge > * , .ds-badge__t { display: inline-block; transform: skewX(var(--ftel-skew-inverse)); }
.ds-badge--blue { background: var(--ftel-blue); }
.ds-badge--lime { background: var(--ftel-lime); color: var(--ftel-black); }
.ds-badge--pink { background: var(--ftel-pink); color: var(--ftel-black); }
.ds-badge--soft { background: var(--ds-brand-soft-2); color: var(--ds-brand-ink); }
.ds-badge--dark { background: var(--ftel-black); }

/* ---------- Chip (lọc, lựa chọn) ---------- */
.ds-chip {
  display: inline-flex; align-items: center; gap: .4em; min-height: var(--ds-control-h-sm); padding: 0 1em;
  border-radius: var(--ds-radius-pill); border: 1.5px solid var(--ds-border); background: var(--ds-surface);
  font-size: var(--ds-fs-body-sm); font-weight: 600; color: var(--ds-text); cursor: pointer;
}
.ds-chip[aria-pressed="true"], .ds-chip--active { background: var(--ds-brand-soft); border-color: var(--ds-brand); color: var(--ds-brand-ink); }

/* ---------- Card ---------- */
.ds-card {
  background: var(--ds-surface); border-radius: var(--ds-radius-lg); box-shadow: var(--ds-shadow-md);
  overflow: hidden; position: relative;
}
.ds-card__media { aspect-ratio: 16 / 9; background: var(--ds-brand-gradient); position: relative; overflow: hidden; }
.ds-card__media img { width: 100%; height: 100%; object-fit: cover; display: block; }
.ds-card__body { padding: var(--ds-space-4); display: grid; gap: var(--ds-space-2); }
.ds-card--brand { background: var(--ds-brand-gradient); color: var(--ds-text-inverse); }
.ds-card--subtle { background: var(--ds-surface-subtle); box-shadow: none; }
.ds-card--interactive { cursor: pointer; transition: transform var(--ds-dur-base) var(--ds-ease-standard), box-shadow var(--ds-dur-base); }
.ds-card--interactive:hover { transform: translateY(-2px); box-shadow: var(--ds-shadow-lg); }
/* Corner shape — khối bit cắt góc phải trên, bắt buộc theo brand khi đặt logo/ảnh (trang 16) */
.ds-corner { position: absolute; top: 0; right: 0; width: 28%; max-width: 160px; aspect-ratio: 1; pointer-events: none;
  background: url("../assets/bitdot/bitdot-corner.svg") top right / contain no-repeat; }

/* ---------- Field (form thu lead) ---------- */
.ds-field { display: grid; gap: var(--ds-space-1); }
.ds-field__label { font-size: var(--ds-fs-body-sm); font-weight: 600; color: var(--ds-text); }
.ds-field__hint { font-size: var(--ds-fs-caption); color: var(--ds-text-secondary); }
.ds-field__error { font-size: var(--ds-fs-caption); color: var(--ds-danger); font-weight: 600; }
.ds-input {
  width: 100%; min-height: max(var(--ds-control-h-md), var(--ds-touch-min)); padding: 0 var(--ds-space-4);
  font: inherit; font-size: max(16px, var(--ds-fs-body)); /* ≥16px để iOS không tự zoom */
  color: var(--ds-text); background: var(--ds-surface);
  border: 1.5px solid var(--ds-border); border-radius: var(--ds-radius-md);
  transition: border-color var(--ds-dur-fast), box-shadow var(--ds-dur-fast);
}
.ds-input::placeholder { color: var(--ds-text-tertiary); }
.ds-input:focus { outline: none; border-color: var(--ds-brand); box-shadow: 0 0 0 4px var(--ds-brand-soft-2); }
.ds-input[aria-invalid="true"] { border-color: var(--ds-danger); }
.ds-otp { display: grid; grid-template-columns: repeat(6, 1fr); gap: var(--ds-space-2); }
.ds-otp .ds-input { text-align: center; padding: 0; font-family: var(--ds-font-number); font-size: var(--ds-fs-h3); }

.ds-check { display: flex; gap: var(--ds-space-3); align-items: flex-start; font-size: var(--ds-fs-body-sm); cursor: pointer; }
.ds-check input { appearance: none; flex: none; width: 1.5em; height: 1.5em; margin: 0; border: 2px solid var(--ds-border-strong); border-radius: 6px; display: grid; place-items: center; cursor: pointer; }
.ds-check input:checked { background: var(--ds-brand-strong); border-color: var(--ds-brand-strong); }
.ds-check input:checked::after { content: ""; width: .45em; height: .8em; border: solid #fff; border-width: 0 3px 3px 0; transform: translateY(-1px) rotate(45deg); }

/* ---------- HUD trong game: điểm · thời gian · mạng · lượt ---------- */
.ds-hud { display: flex; align-items: center; justify-content: space-between; gap: var(--ds-space-3); padding: var(--ds-space-3) var(--ds-gutter); position: relative; z-index: var(--ds-z-hud); }
.ds-stat {
  display: inline-flex; align-items: center; gap: var(--ds-space-2);
  padding: var(--ds-space-1) var(--ds-space-4) var(--ds-space-1) var(--ds-space-1);
  background: rgba(255, 255, 255, .92); color: var(--ds-text); border-radius: var(--ds-radius-pill); box-shadow: var(--ds-shadow-sm);
  font-family: var(--ds-font-number); font-weight: 700; font-size: var(--ds-fs-sub1);
}
.ds-stat__icon { width: 1.8em; height: 1.8em; border-radius: 50%; display: grid; place-items: center; background: var(--ds-brand-strong); color: #fff; font-size: .8em; }
.ds-stat--warn { color: var(--ds-danger); animation: ds-pulse 1s var(--ds-ease-standard) infinite; }

.ds-score { font-family: var(--ds-font-number); font-weight: 700; font-size: var(--ds-fs-score); line-height: 1; font-variant-numeric: tabular-nums; }

/* Đồng hồ vòng: đặt --p (0–100) */
.ds-timer { --p: 100; --s: calc(var(--ds-touch-min) * 1.4); width: var(--s); height: var(--s); border-radius: 50%; display: grid; place-items: center;
  background: conic-gradient(var(--ds-brand-strong) calc(var(--p) * 1%), var(--ds-brand-soft-2) 0); }
.ds-timer::before { content: ""; grid-area: 1 / 1; width: 78%; height: 78%; border-radius: 50%; background: var(--ds-surface); }
.ds-timer > span { grid-area: 1 / 1; position: relative; color: var(--ds-text); font-family: var(--ds-font-number); font-weight: 700; font-size: var(--ds-fs-h3); }

/* Thanh tiến độ — dạng chuỗi bit */
.ds-progress { height: 12px; border-radius: var(--ds-radius-pill); background: var(--ds-brand-soft-2); overflow: hidden; }
.ds-progress > i { display: block; height: 100%; width: var(--v, 50%); background: var(--ds-brand-gradient); border-radius: inherit; transition: width var(--ds-dur-slow) var(--ds-ease-standard); }
.ds-bits { display: flex; gap: 6px; }
.ds-bits > i { width: 18px; height: 18px; border-radius: 5px; background: var(--ds-brand-soft-2); transform: skewX(var(--ftel-skew)); }
.ds-bits > i.on { background: var(--ds-brand-strong); }
[data-platform="kiosk"] .ds-bits > i { width: 36px; height: 36px; border-radius: 9px; }
[data-platform="kiosk"] .ds-progress { height: 24px; }

/* ---------- Lượt chơi còn lại ---------- */
.ds-turns { display: inline-flex; align-items: center; gap: var(--ds-space-2); padding: var(--ds-space-2) var(--ds-space-4); border-radius: var(--ds-radius-pill); background: var(--ds-brand-soft); color: var(--ds-brand-ink); font-weight: 700; font-size: var(--ds-fs-body-sm); }
.ds-turns b { font-family: var(--ds-font-number); font-size: 1.4em; color: var(--ds-brand-strong); }

/* ---------- Voucher / phần quà ---------- */
.ds-voucher {
  --notch: 14px;
  display: grid; grid-template-columns: 34% 1fr; align-items: stretch;
  background: var(--ds-surface); border-radius: var(--ds-radius-lg); box-shadow: var(--ds-shadow-md); overflow: hidden;
  -webkit-mask: radial-gradient(circle var(--notch) at var(--cut, 34%) 0, #0000 98%, #000) top / 100% 51% no-repeat,
                radial-gradient(circle var(--notch) at var(--cut, 34%) 100%, #0000 98%, #000) bottom / 100% 51% no-repeat;
          mask: radial-gradient(circle var(--notch) at var(--cut, 34%) 0, #0000 98%, #000) top / 100% 51% no-repeat,
                radial-gradient(circle var(--notch) at var(--cut, 34%) 100%, #0000 98%, #000) bottom / 100% 51% no-repeat;
}
.ds-voucher__value { display: grid; place-items: center; text-align: center; padding: var(--ds-space-4); background: var(--ds-brand-gradient); color: #fff; font-family: var(--ds-font-display); font-weight: 700; font-size: var(--ds-fs-h2); line-height: 1.05; border-right: 2px dashed rgba(255,255,255,.6); }
.ds-voucher__body { padding: var(--ds-space-4); display: grid; gap: var(--ds-space-1); align-content: center; }
.ds-voucher__code { font-family: var(--ds-font-number); font-weight: 700; letter-spacing: .12em; padding: var(--ds-space-1) var(--ds-space-3); background: var(--ds-surface-subtle); border: 1.5px dashed var(--ds-border-strong); border-radius: var(--ds-radius-sm); justify-self: start; }

/* ---------- Kết quả (win / lose) ---------- */
.ds-result { text-align: center; display: grid; gap: var(--ds-space-4); justify-items: center; padding: var(--ds-space-8) var(--ds-gutter); }
.ds-result__burst { width: min(60%, 280px); aspect-ratio: 1; display: grid; place-items: center; position: relative; }
.ds-result__burst::before { content: ""; position: absolute; inset: 0; background: url("../assets/bitdot/bitdot-cluster.svg") center / contain no-repeat; opacity: .18; animation: ds-spin 18s linear infinite; }
.ds-result--win .ds-result__burst > * { animation: ds-pop var(--ds-dur-reward) var(--ds-ease-bounce) both; }
.ds-result--lose .ds-result__burst::before { filter: grayscale(1); opacity: .1; animation: none; }

/* ---------- Modal & bottom sheet ---------- */
.ds-overlay { position: fixed; inset: 0; background: var(--ds-overlay); z-index: var(--ds-z-modal); display: grid; place-items: center; padding: var(--ds-gutter); animation: ds-fade var(--ds-dur-base) var(--ds-ease-out); }
.ds-modal { width: min(100%, 440px); background: var(--ds-surface); border-radius: var(--ds-radius-xl); box-shadow: var(--ds-shadow-lg); padding: var(--ds-space-6); display: grid; gap: var(--ds-space-4); position: relative; overflow: hidden; animation: ds-pop var(--ds-dur-slow) var(--ds-ease-bounce); }
[data-platform="kiosk"] .ds-modal { width: min(100%, 880px); padding: var(--ds-space-16); gap: var(--ds-space-8); }
.ds-sheet { position: fixed; left: 0; right: 0; bottom: 0; z-index: var(--ds-z-sheet); background: var(--ds-surface); border-radius: var(--ds-radius-xl) var(--ds-radius-xl) 0 0; padding: var(--ds-space-3) var(--ds-gutter) calc(var(--ds-space-6) + var(--ds-safe-bottom)); box-shadow: var(--ds-shadow-lg); }
.ds-sheet::before { content: ""; display: block; width: 40px; height: 4px; border-radius: 4px; background: var(--ds-border); margin: 0 auto var(--ds-space-4); }

/* ---------- Toast ---------- */
.ds-toast { display: inline-flex; align-items: center; gap: var(--ds-space-3); padding: var(--ds-space-3) var(--ds-space-4); border-radius: var(--ds-radius-md); background: var(--ds-surface-inverse); color: var(--ds-text-inverse); font-size: var(--ds-fs-body-sm); font-weight: 600; box-shadow: var(--ds-shadow-lg); }
.ds-toast--success { background: var(--ds-success-ink); }
.ds-toast--error { background: var(--ds-danger); }

/* ---------- Leaderboard ---------- */
.ds-rank { list-style: none; margin: 0; padding: 0; display: grid; gap: var(--ds-space-2); }
.ds-rank__row { display: grid; grid-template-columns: 2.4em 2.6em 1fr auto; align-items: center; gap: var(--ds-space-3); padding: var(--ds-space-2) var(--ds-space-3); border-radius: var(--ds-radius-md); background: var(--ds-surface); }
.ds-rank__pos { font-family: var(--ds-font-number); font-weight: 700; font-size: var(--ds-fs-sub1); text-align: center; color: var(--ds-text-secondary); }
.ds-rank__avatar { width: 2.6em; height: 2.6em; border-radius: 50%; background: var(--ds-brand-soft-2); object-fit: cover; }
.ds-rank__name { font-weight: 600; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.ds-rank__score { font-family: var(--ds-font-number); font-weight: 700; color: var(--ds-brand-ink); }
.ds-rank__row--1 .ds-rank__pos { color: #fff; background: var(--ds-brand-strong); border-radius: 8px; transform: skewX(var(--ftel-skew)); }
.ds-rank__row--2 .ds-rank__pos { color: #fff; background: var(--ftel-blue-2); border-radius: 8px; transform: skewX(var(--ftel-skew)); }
.ds-rank__row--3 .ds-rank__pos { color: var(--ftel-black); background: var(--ftel-lime); border-radius: 8px; transform: skewX(var(--ftel-skew)); }
.ds-rank__row--me { background: var(--ds-brand-soft); box-shadow: inset 0 0 0 2px var(--ds-brand); }

/* ---------- App bar (web / app; Zalo dùng header của Zalo) ---------- */
.ds-appbar { position: sticky; top: 0; z-index: var(--ds-z-sticky); min-height: var(--ds-header-h); padding: var(--ds-safe-top) var(--ds-gutter) 0; display: flex; align-items: center; justify-content: space-between; gap: var(--ds-space-3); background: var(--ds-surface); box-shadow: 0 1px 0 var(--ds-border); }
.ds-appbar__logo { width: 150px; height: auto; } /* brand: logo digital không nhỏ hơn 150px ngang */
[data-platform="zalo"] .ds-appbar, [data-platform="app"] .ds-appbar { display: none; }

/* ---------- Layout helpers ---------- */
.ds-container { width: 100%; max-width: var(--ds-container); margin: 0 auto; padding: 0 var(--ds-gutter); }
.ds-stack { display: grid; gap: var(--ds-gap, var(--ds-space-4)); }
.ds-row { display: flex; flex-wrap: wrap; align-items: center; gap: var(--ds-gap, var(--ds-space-3)); }
.ds-screen { min-height: 100dvh; display: flex; flex-direction: column; padding-top: var(--ds-safe-top); padding-bottom: var(--ds-safe-bottom); }
.ds-bg-brand { background: var(--ds-brand-gradient); color: var(--ds-text-inverse); }
.ds-bg-pattern { background-color: var(--ds-surface); background-image: url("../assets/bitdot/pattern-tile.svg"); background-size: 220px auto; }
.ds-bg-brand.ds-bg-pattern { background-image: url("../assets/bitdot/pattern-tile.svg"), var(--ds-brand-gradient); background-blend-mode: screen, normal; }
.ds-safe-bottom-bar { position: sticky; bottom: 0; padding: var(--ds-space-3) var(--ds-gutter) calc(var(--ds-space-3) + var(--ds-safe-bottom)); background: linear-gradient(to top, var(--ds-surface) 70%, transparent); }

/* ---------- Loader bit-dot ---------- */
.ds-loader { display: inline-grid; grid-template-columns: repeat(3, 1fr); gap: 4px; width: 40px; transform: skewX(var(--ftel-skew)); }
.ds-loader > i { aspect-ratio: 1; border-radius: 3px; background: var(--ds-brand-strong); animation: ds-blink 1.2s var(--ds-ease-standard) infinite; }
.ds-loader > i:nth-child(2n) { visibility: hidden; }
.ds-loader > i:nth-child(1) { animation-delay: 0s; } .ds-loader > i:nth-child(3) { animation-delay: .15s; }
.ds-loader > i:nth-child(5) { animation-delay: .3s; } .ds-loader > i:nth-child(9) { animation-delay: .45s; } .ds-loader > i:nth-child(7) { animation-delay: .6s; }
[data-platform="kiosk"] .ds-loader { width: 96px; gap: 8px; }

/* ---------- Animations ---------- */
@keyframes ds-pop { from { transform: scale(.6); opacity: 0; } to { transform: scale(1); opacity: 1; } }
@keyframes ds-fade { from { opacity: 0; } to { opacity: 1; } }
@keyframes ds-spin { to { transform: rotate(360deg); } }
@keyframes ds-pulse { 50% { transform: scale(1.08); } }
@keyframes ds-blink { 0%, 100% { opacity: .25; } 40% { opacity: 1; } }
@media (prefers-reduced-motion: reduce) {
  .ds-result__burst::before, .ds-stat--warn, .ds-loader > i { animation: none; }
}

/* Bảng xếp hạng trên màn lớn (kiosk, TV) — đọc từ xa */
[data-platform="kiosk"] .ds-rank, [data-platform="tv"] .ds-rank { font-size: var(--ds-fs-sub1); gap: var(--ds-space-3); }
[data-platform="kiosk"] .ds-rank__row, [data-platform="tv"] .ds-rank__row { padding: .4em .6em; }