/* ============================================================
   grmail — monochrome, Apple-style
   ============================================================ */

:root {
  --font: -apple-system, BlinkMacSystemFont, "SF Pro Text", "SF Pro Display",
          system-ui, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --mono: ui-monospace, "SF Mono", Menlo, "Cascadia Mono", Consolas, monospace;

  --ease: cubic-bezier(0.32, 0.72, 0.35, 1);

  --radius-lg: 22px;
  --radius-md: 16px;
  --radius-sm: 12px;

  --toolbar-h: 56px;
  --shadow-sheet: 0 -12px 48px rgba(0, 0, 0, 0.22), 0 -2px 12px rgba(0, 0, 0, 0.12);
}

:root[data-theme="light"] {
  color-scheme: light;
  --bg: #ffffff;
  --bg-2: #f5f5f7;
  --text: #15151a;
  --text-2: #65656d;
  --text-3: #8b8b94;
  --surface: #ffffff;
  --surface-2: #eceef0;
  --fill: rgba(0, 0, 0, 0.045);
  --fill-2: rgba(0, 0, 0, 0.09);
  --toolbar-bg: rgba(255, 255, 255, 0.72);
  --toolbar-bg-raised: rgba(255, 255, 255, 0.86);
  --toolbar-border: rgba(0, 0, 0, 0.07);
  --toolbar-border-raised: rgba(0, 0, 0, 0.14);
  --card-bg: rgba(255, 255, 255, 0.8);
  --sep: rgba(0, 0, 0, 0.08);
  --sheet-bg: rgba(252, 252, 253, 0.88);
  --scrim: rgba(20, 20, 24, 0.30);
  --shadow-card: 0 1px 2px rgba(0, 0, 0, 0.04), 0 8px 28px rgba(0, 0, 0, 0.06);
  --shadow-sheet: 0 -14px 56px rgba(0, 0, 0, 0.16), 0 -2px 12px rgba(0, 0, 0, 0.08);
  --shadow-pop: 0 24px 64px rgba(0, 0, 0, 0.24), 0 4px 16px rgba(0, 0, 0, 0.12);
}

:root[data-theme="dark"] {
  color-scheme: dark;
  --bg: #000000;
  --bg-2: #0c0c0e;
  --text: #f2f2f5;
  --text-2: #a4a4ad;
  --text-3: #76767f;
  --surface: #16161a;
  --surface-2: #202025;
  --fill: rgba(255, 255, 255, 0.06);
  --fill-2: rgba(255, 255, 255, 0.12);
  --toolbar-bg: rgba(14, 14, 16, 0.7);
  --toolbar-bg-raised: rgba(14, 14, 16, 0.88);
  --toolbar-border: rgba(255, 255, 255, 0.08);
  --toolbar-border-raised: rgba(255, 255, 255, 0.16);
  --card-bg: rgba(24, 24, 27, 0.72);
  --sep: rgba(255, 255, 255, 0.09);
  --sheet-bg: rgba(20, 20, 23, 0.86);
  --scrim: rgba(0, 0, 0, 0.62);
  --shadow-card: 0 1px 2px rgba(0, 0, 0, 0.5), 0 12px 32px rgba(0, 0, 0, 0.4);
  --shadow-sheet: 0 -16px 60px rgba(0, 0, 0, 0.7), 0 -2px 14px rgba(0, 0, 0, 0.5);
  --shadow-pop: 0 28px 72px rgba(0, 0, 0, 0.75), 0 6px 20px rgba(0, 0, 0, 0.5);
}

* { box-sizing: border-box; }

/* author display rules must not defeat the hidden attribute */
[hidden] { display: none !important; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  font-family: var(--font);
  font-size: 100%;
  line-height: 1.5;
  background: var(--bg);
  color: var(--text);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  min-height: 100vh;
  overflow-x: hidden;
}

/* gradual theme crossfade — never a hard blink */
body, .toolbar, .toolbar-inner, .card, .btn, .icon-btn, .mail-item,
.sheet, .confirm-card, .toast, .badge, .skeleton, .empty, .scrim,
.tier-select, .tier-pill, .addr-bar, .addr-pill, .pill-body, .pill-badge, .pill-x, .hint {
  transition: background-color 0.45s var(--ease), color 0.45s var(--ease),
              border-color 0.45s var(--ease), box-shadow 0.45s var(--ease);
}

h1, h2, h3, p { margin: 0; }

::selection { background: var(--fill-2); }

button { font: inherit; color: inherit; }

.skip-link {
  position: fixed; top: 8px; left: 50%; transform: translateX(-50%);
  z-index: 100; padding: 8px 16px; border-radius: 99px;
  background: var(--text); color: var(--bg); font-size: 0.85rem; font-weight: 600;
  text-decoration: none; opacity: 0; pointer-events: none;
  transition: opacity 0.2s var(--ease);
}
.skip-link:focus { opacity: 1; pointer-events: auto; }

/* ---------- toolbar (translucent floating chrome) ---------- */

.toolbar {
  position: sticky; top: 0; z-index: 10;
  background: var(--toolbar-bg);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  backdrop-filter: blur(20px) saturate(180%);
  border-bottom: 1px solid transparent;
  padding-top: env(safe-area-inset-top);
  transition: background-color 0.35s var(--ease), border-color 0.35s var(--ease);
}
.toolbar.raised {
  background: var(--toolbar-bg-raised);
  border-bottom-color: var(--toolbar-border-raised);
}
.toolbar-inner {
  max-width: 680px; margin: 0 auto; height: var(--toolbar-h);
  padding: 0 18px;
  display: flex; align-items: center; justify-content: space-between; gap: 12px;
}
.brand {
  display: flex; align-items: center; gap: 8px;
  font-size: 1.06rem; font-weight: 700;
  letter-spacing: -0.02em;
}
.brand-mark { width: 22px; height: 22px; display: block; }

/* ---------- buttons ---------- */

.icon-btn {
  position: relative;
  width: 40px; height: 40px; flex: none;
  display: grid; place-items: center;
  border: 0; border-radius: 50%;
  background: transparent; color: var(--text);
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
  transition: transform 120ms ease-out, background-color 0.2s var(--ease), color 0.45s var(--ease);
}
.icon-btn:hover { background: var(--fill); }
.icon-btn:active { transform: scale(0.92); }
.icon-btn:disabled { opacity: 0.35; cursor: default; }
.icon-btn:disabled:hover { background: transparent; }
.icon-btn:focus-visible { outline: 2px solid var(--text-2); outline-offset: 2px; }

.icon { width: 21px; height: 21px; display: block; }

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  height: 46px; padding: 0 20px;
  border: 1px solid var(--sep); border-radius: var(--radius-sm);
  background: var(--fill); color: var(--text);
  font-size: 0.95rem; font-weight: 600; letter-spacing: -0.01em;
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
  transition: transform 120ms ease-out, background-color 0.2s var(--ease), color 0.45s var(--ease);
}
.btn:hover { background: var(--fill-2); }
.btn:active { transform: scale(0.97); }
.btn:disabled { opacity: 0.5; pointer-events: none; }
.btn:focus-visible { outline: 2px solid var(--text-2); outline-offset: 2px; }

.btn-primary {
  background: var(--text); border-color: transparent; color: var(--bg);
}
.btn-primary:hover { background: var(--text); opacity: 0.88; }

.btn-danger {
  background: var(--text); border-color: transparent; color: var(--bg);
  font-weight: 650;
}

.btn-sm {
  height: 32px; padding: 0 14px;
  font-size: 0.82rem; border-radius: 10px;
}

/* ---------- tier selector (segmented control) ---------- */

.tier-select {
  position: relative;
  display: grid;
  grid-template-columns: 1fr 1fr;
  padding: 4px;
  margin-bottom: 12px;
  background: var(--fill);
  border: 1px solid var(--sep);
  border-radius: 13px;
}
.tier-pill {
  position: relative;
  z-index: 1;
  height: 36px;
  border: 0; border-radius: 9px;
  background: transparent;
  color: var(--text-2);
  font-size: 0.85rem; font-weight: 600; letter-spacing: -0.011em;
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
  transition: color 0.2s var(--ease), transform 110ms ease-out;
}
.tier-pill.active { color: var(--text); }
.tier-pill:active { transform: scale(0.96); }
.tier-pill:focus-visible { outline: 2px solid var(--text-2); outline-offset: -2px; }

.tier-indicator {
  position: absolute;
  z-index: 0;
  top: 4px; bottom: 4px; left: 4px;
  width: calc(50% - 4px);
  background: var(--surface);
  border: 1px solid var(--sep);
  border-radius: 9px;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.10);
  transition: left 0.34s var(--ease);
}
.tier-select.advanced .tier-indicator { left: 50%; }

.hint {
  margin: 10px 2px 0;
  font-size: 0.8rem; line-height: 1.4;
  color: var(--text-3);
  text-align: center;
  letter-spacing: 0.01em;
}

/* theme toggle icon crossfade */
.icon-sun, .icon-moon {
  position: absolute; inset: 0; margin: auto;
  transition: opacity 0.3s var(--ease), transform 0.4s var(--ease);
}
:root[data-theme="dark"] .icon-sun { opacity: 1; transform: rotate(0deg) scale(1); }
:root[data-theme="dark"] .icon-moon { opacity: 0; transform: rotate(-90deg) scale(0.6); }
:root[data-theme="light"] .icon-sun { opacity: 0; transform: rotate(90deg) scale(0.6); }
:root[data-theme="light"] .icon-moon { opacity: 1; transform: rotate(0deg) scale(1); }

/* copy success state */
.icon-check { position: absolute; opacity: 0; transform: scale(0.6); }
.copy-btn.copied .icon-check { opacity: 1; transform: scale(1); transition: opacity 0.18s var(--ease), transform 0.28s var(--ease); }
.copy-btn.copied .icon:not(.icon-check) { opacity: 0; transition: opacity 0.18s var(--ease); }

/* ---------- layout ---------- */

.app {
  max-width: 680px; margin: 0 auto;
  padding: 20px 18px calc(56px + env(safe-area-inset-bottom));
  display: flex; flex-direction: column; gap: 26px;
}

.card {
  background: var(--card-bg);
  -webkit-backdrop-filter: blur(24px) saturate(160%);
  backdrop-filter: blur(24px) saturate(160%);
  border: 1px solid var(--sep);
  border-radius: var(--radius-lg);
  padding: 22px 20px 18px;
  box-shadow: var(--shadow-card);
}

.label {
  font-size: 0.7rem; font-weight: 650; letter-spacing: 0.11em;
  text-transform: uppercase; color: var(--text-3);
  margin-bottom: 12px;
}

.address-row {
  display: flex; align-items: center; gap: 6px;
}
.address {
  font-size: clamp(1.28rem, 5vw, 1.72rem);
  line-height: 1.16; letter-spacing: -0.028em; font-weight: 650;
  word-break: break-all; flex: 1; min-width: 0;
}
.copy-btn { flex: none; }

.actions { margin-top: 18px; }
.actions .btn { width: 100%; }

.status {
  display: flex; align-items: center; gap: 8px;
  margin-top: 16px;
  font-size: 0.82rem; color: var(--text-3);
  letter-spacing: 0.01em;
}
.dot {
  position: relative; flex: none;
  width: 7px; height: 7px; border-radius: 50%;
  background: currentColor;
}
.dot::after {
  content: ""; position: absolute; inset: -5px;
  border-radius: 50%; border: 1.2px solid currentColor;
  opacity: 0;
  animation: pulse 2.6s var(--ease) infinite;
}
@keyframes pulse {
  0% { transform: scale(0.55); opacity: 0.45; }
  65% { opacity: 0; }
  100% { transform: scale(1.5); opacity: 0; }
}

/* ---------- address switcher (multi-address pills) ---------- */

.addr-bar {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 0 4px;
}
.addr-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.addr-pill {
  display: inline-flex;
  align-items: stretch;
  overflow: hidden;
  border: 1px solid var(--sep);
  border-radius: 99px;
  background: var(--fill);
}
.addr-pill.active {
  background: var(--text);
  border-color: transparent;
}
.pill-body {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 6px 4px 6px 13px;
  border: 0;
  background: transparent;
  color: var(--text);
  font: inherit;
  font-size: 0.83rem; font-weight: 600; letter-spacing: -0.011em;
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
  transition: color 0.2s var(--ease), transform 110ms ease-out;
}
.addr-pill.active .pill-body { color: var(--bg); }
.pill-body:active { transform: scale(0.965); }
.pill-body:focus-visible { outline: 2px solid var(--text-2); outline-offset: -2px; }
.pill-frag {
  font-family: var(--mono);
  font-size: 0.76rem; font-weight: 500;
  letter-spacing: 0.015em;
  white-space: nowrap;
}
.pill-badge {
  flex: none;
  padding: 1px 7px;
  border: 1px solid transparent;
  border-radius: 99px;
  font-size: 0.66rem; font-weight: 700; letter-spacing: 0.04em;
  background: var(--fill-2);
  color: var(--text-2);
}
.pill-badge-advanced {
  background: transparent;
  border-color: var(--text-3);
}
.pill-badge-expired {
  background: transparent;
  border-style: dashed;
  border-color: var(--text-3);
  color: var(--text-3);
}
.addr-pill.active .pill-badge {
  background: rgba(128, 128, 128, 0.24);
  border-color: currentColor;
  color: inherit;
}
.pill-x {
  flex: none;
  align-self: stretch;
  display: grid;
  place-items: center;
  width: 26px;
  border: 0;
  background: transparent;
  color: var(--text-3);
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
  transition: color 0.2s var(--ease), transform 110ms ease-out;
}
.pill-x svg { width: 11px; height: 11px; display: block; }
.pill-x:hover { color: var(--text); }
.pill-x:active { transform: scale(0.85); }
.pill-x:focus-visible { outline: 2px solid var(--text-2); outline-offset: -2px; }
.addr-pill.active .pill-x { color: var(--bg); opacity: 0.6; }
.addr-pill.active .pill-x:hover { opacity: 1; }

.addr-meta {
  display: flex;
  align-items: center;
  gap: 10px;
  min-height: 24px;
  padding: 0 4px;
}
.meta-exp {
  font-size: 0.8rem;
  color: var(--text-3);
  letter-spacing: 0.01em;
}
.badge-expired {
  flex: none;
  background: transparent;
  border: 1px dashed var(--text-3);
  color: var(--text-3);
}

/* ---------- inbox ---------- */

.inbox-head {
  display: flex; align-items: baseline; gap: 10px;
  padding: 0 4px 12px;
}
.inbox-head h2 {
  font-size: 1.32rem; font-weight: 650; letter-spacing: -0.022em;
}
.badge {
  min-width: 22px; padding: 2px 8px; border-radius: 99px;
  background: var(--fill-2); color: var(--text-2);
  font-size: 0.74rem; font-weight: 650; letter-spacing: 0.02em;
  text-align: center;
  font-variant-numeric: tabular-nums;
}

/* manual refresh — icon hints at the gesture, then spins while fetching */
.refresh-btn {
  align-self: center;
  margin-left: auto;
}
.refresh-btn .icon { transition: transform 0.22s var(--ease); }
.refresh-btn:not(:disabled):hover .icon { transform: rotate(-70deg); }
.refresh-btn.spinning .icon {
  animation: spin 0.8s cubic-bezier(0.4, 0, 0.2, 1) infinite;
  transition: none;
}
@keyframes spin { to { transform: rotate(360deg); } }

.mail-list { display: flex; flex-direction: column; }

.mail-item {
  position: relative;
  display: flex; align-items: center; gap: 13px;
  width: 100%; text-align: left;
  padding: 14px 16px;
  border: 0;   border-bottom: 1px solid var(--sep);
  border-radius: var(--radius-md);
  background: transparent; color: var(--text);
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
  transition: background-color 0.18s var(--ease), opacity 0.3s var(--ease),
              border-color 0.45s var(--ease);
  will-change: transform, opacity;
}
.mail-item:first-child { border-top: 1px solid var(--sep); }
.mail-item:hover { background: var(--fill); }
/* press feedback owns the transform transition; entry springs own it otherwise */
.mail-item:active {
  transform: scale(0.985);
  background: var(--fill-2);
  transition: transform 110ms ease-out, background-color 0.18s var(--ease);
}
.mail-item:focus-visible { outline: 2px solid var(--text-2); outline-offset: -2px; }
.mail-item.removing {
  opacity: 0; transform: scale(0.96) translateY(-6px); pointer-events: none;
  transition: opacity 0.28s var(--ease), transform 0.28s var(--ease);
}

.avatar {
  flex: none;
  width: 40px; height: 40px; border-radius: 50%;
  display: grid; place-items: center;
  background: var(--fill-2); color: var(--text-2);
  font-size: 0.95rem; font-weight: 650; letter-spacing: 0.01em;
  user-select: none;
}
.mail-main { flex: 1; min-width: 0; }
.mail-top {
  display: flex; align-items: baseline; gap: 8px;
  margin-bottom: 3px;
}
.mail-from {
  font-size: 0.95rem; font-weight: 600; letter-spacing: -0.012em;
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis; flex: 1;
}
.mail-time {
  flex: none;
  font-size: 0.76rem; color: var(--text-3);
  font-variant-numeric: tabular-nums;
}
.mail-subject {
  font-size: 0.88rem; color: var(--text-2); font-weight: 400;
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.unread-dot {
  flex: none; width: 7px; height: 7px; border-radius: 50%;
  background: var(--text); opacity: 0;
}
.mail-item.unread .unread-dot { opacity: 1; }
.mail-item.unread .mail-from { font-weight: 700; }

/* ---------- skeleton ---------- */

.skeleton {
  display: flex; align-items: center; gap: 13px;
  padding: 14px 16px;
  border-bottom: 1px solid var(--sep);
}
.skel {
  border-radius: 8px;
  background: linear-gradient(100deg, var(--surface-2) 28%, var(--fill-2) 50%, var(--surface-2) 72%);
  background-size: 220% 100%;
  animation: shimmer 1.35s linear infinite;
}
@keyframes shimmer { to { background-position: -220% 0; } }
.skel-circle { width: 40px; height: 40px; border-radius: 50%; flex: none; }
.skel-lines { flex: 1; display: flex; flex-direction: column; gap: 8px; }
.skel-line { height: 11px; }
.skel-line.w40 { width: 40%; }
.skel-line.w75 { width: 75%; }

/* ---------- empty state ---------- */

.empty {
  padding: 52px 24px 56px;
  text-align: center;
  border: 1px dashed var(--sep);
  border-radius: var(--radius-lg);
}
.empty svg {
  width: 52px; height: 52px; color: var(--text-3);
  margin-bottom: 16px;
  opacity: 0.9;
}
.empty h3 {
  font-size: 1.05rem; font-weight: 600; letter-spacing: -0.015em;
  margin-bottom: 6px;
}
.empty p {
  font-size: 0.88rem; color: var(--text-3); line-height: 1.5;
  max-width: 34ch; margin: 0 auto;
}

/* ---------- scrims & sheet ---------- */

.scrim {
  position: fixed; inset: 0; z-index: 30;
  background: var(--scrim);
  -webkit-backdrop-filter: blur(3px);
  backdrop-filter: blur(3px);
  opacity: 0;
  transition: opacity 0.45s var(--ease);
}
.scrim-2 { z-index: 50; }

.sheet-wrap {
  position: fixed; inset: 0; z-index: 40;
  display: flex; align-items: flex-end; justify-content: center;
  pointer-events: none;
}
@media (min-width: 640px) {
  .sheet-wrap { align-items: center; }
}

.sheet {
  pointer-events: auto;
  width: 100%;
  max-height: 88vh;
  display: flex; flex-direction: column;
  background: var(--sheet-bg);
  -webkit-backdrop-filter: blur(40px) saturate(180%);
  backdrop-filter: blur(40px) saturate(180%);
  border-top: 1px solid var(--sep);
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
  box-shadow: var(--shadow-sheet);
  padding-bottom: env(safe-area-inset-bottom);
  opacity: 0;
  transform: translateY(40px) scale(0.985);
  will-change: transform, opacity;
}
@media (min-width: 640px) {
  .sheet {
    width: min(620px, calc(100vw - 40px));
    max-height: 82vh;
    border: 1px solid var(--sep);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-pop);
  }
}

.sheet-grab {
  position: relative;
  flex: none;
  display: flex; justify-content: center;
  padding: 9px 0 3px;
  cursor: grab;
  touch-action: none;
}
/* extend the hit area upward */
.sheet-grab::before { content: ""; position: absolute; left: 0; right: 0; bottom: 100%; height: 10px; }
.sheet-grab:active { cursor: grabbing; }
.grab-pill {
  width: 36px; height: 5px; border-radius: 99px;
  background: var(--text-3); opacity: 0.55;
}

.sheet-head {
  flex: none;
  display: flex; align-items: center; gap: 8px;
  padding: 6px 10px 8px;
  border-bottom: 1px solid var(--sep);
}
.sheet-title {
  flex: 1; min-width: 0;
  font-size: 0.92rem; font-weight: 600; letter-spacing: -0.01em;
  text-align: center;
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
  color: var(--text-2);
}

.sheet-body {
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  padding: 20px 20px 28px;
  flex: 1;
}
.sheet-body.dragging { overflow: hidden; }

.mail-meta {
  display: flex; align-items: center; gap: 12px;
  margin-bottom: 18px;
}
.mail-meta .avatar { width: 44px; height: 44px; font-size: 1.02rem; }
.meta-main { flex: 1; min-width: 0; }
.meta-from {
  font-size: 0.98rem; font-weight: 600; letter-spacing: -0.015em;
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.meta-to {
  font-size: 0.78rem; color: var(--text-3);
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.meta-time {
  flex: none;
  font-size: 0.77rem; color: var(--text-3);
  font-variant-numeric: tabular-nums;
}

#sheetSubject {
  font-size: clamp(1.18rem, 4.2vw, 1.48rem);
  line-height: 1.22; letter-spacing: -0.026em; font-weight: 650;
  margin-bottom: 20px;
}

.body-pre {
  font-family: var(--mono);
  font-size: 0.8rem;
  line-height: 1.62;
  letter-spacing: 0.005em;
  color: var(--text-2);
  white-space: pre-wrap;
  word-break: break-word;
  margin: 0;
  padding: 16px;
  background: var(--fill);
  border-radius: var(--radius-md);
  border: 1px solid var(--sep);
}
.body-frame {
  width: 100%; min-height: 52vh;
  border: 1px solid var(--sep);
  border-radius: var(--radius-md);
  background: var(--surface);
}

/* ---------- confirm dialog ---------- */

.confirm-wrap {
  position: fixed; inset: 0; z-index: 60;
  display: flex; align-items: center; justify-content: center;
  padding: 24px;
  pointer-events: none;
}
.confirm-card {
  pointer-events: auto;
  width: 100%; max-width: 340px;
  background: var(--sheet-bg);
  -webkit-backdrop-filter: blur(40px) saturate(180%);
  backdrop-filter: blur(40px) saturate(180%);
  border: 1px solid var(--sep);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-pop);
  padding: 22px 20px 18px;
  text-align: center;
  opacity: 0;
  transform: scale(0.94) translateY(10px);
  will-change: transform, opacity;
}
.confirm-card h3 {
  font-size: 1.08rem; font-weight: 650; letter-spacing: -0.02em;
  margin-bottom: 7px;
}
.confirm-card p {
  font-size: 0.87rem; color: var(--text-2); line-height: 1.48;
  margin-bottom: 20px;
}
.confirm-actions {
  display: flex; gap: 10px;
}
.confirm-actions .btn { flex: 1; height: 44px; }

/* sheet pushed back when confirm stacks above */
.sheet.dimmed {
  filter: saturate(0.7) brightness(0.92);
}

/* ---------- toast ---------- */

.toast {
  position: fixed; z-index: 70;
  left: 50%; bottom: calc(18px + env(safe-area-inset-bottom));
  transform: translateX(-50%);
  display: flex; align-items: center; gap: 14px;
  max-width: calc(100vw - 32px);
  padding: 11px 16px;
  border-radius: 99px;
  background: var(--text); color: var(--bg);
  font-size: 0.87rem; font-weight: 550; letter-spacing: -0.005em;
  box-shadow: var(--shadow-pop);
  -webkit-backdrop-filter: blur(20px);
  backdrop-filter: blur(20px);
  opacity: 0;
  will-change: transform, opacity;
}
.toast button {
  flex: none;
  border: 0; background: transparent; color: inherit;
  font: inherit; font-weight: 700;
  padding: 4px 6px; border-radius: 8px; cursor: pointer;
  opacity: 0.72;
  transition: opacity 0.18s var(--ease);
}
.toast button:hover { opacity: 1; }

/* ---------- responsive ---------- */

@media (max-width: 374px) {
  .app { padding: 16px 14px 48px; }
  .card { padding: 18px 16px 14px; }
  .mail-item, .skeleton { padding: 13px 12px; }
  .sheet-body { padding: 18px 16px 24px; }
}

/* ---------- accessibility: reduced motion ---------- */

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
}

/* ---------- accessibility: reduced transparency ---------- */

@media (prefers-reduced-transparency: reduce) {
  :root[data-theme="light"] {
    --toolbar-bg: #ffffff; --toolbar-bg-raised: #ffffff;
    --card-bg: #ffffff; --sheet-bg: #ffffff;
  }
  :root[data-theme="dark"] {
    --toolbar-bg: #141416; --toolbar-bg-raised: #141416;
    --card-bg: #1a1a1d; --sheet-bg: #1c1c1f;
  }
  .toolbar, .card, .sheet, .confirm-card, .toast, .scrim {
    -webkit-backdrop-filter: none; backdrop-filter: none;
  }
}

/* ---------- accessibility: higher contrast ---------- */

@media (prefers-contrast: more) {
  :root[data-theme="light"] {
    --text-2: #3c3c44; --text-3: #55555e;
    --sep: rgba(0, 0, 0, 0.18); --fill: rgba(0, 0, 0, 0.06);
    --card-bg: #ffffff;
  }
  :root[data-theme="dark"] {
    --text-2: #c9c9d1; --text-3: #a5a5ae;
    --sep: rgba(255, 255, 255, 0.22); --fill: rgba(255, 255, 255, 0.1);
    --card-bg: #1a1a1d;
  }
}

/* OTP card */
.otp-card {
  margin: 12px 0;
  padding: 14px 16px;
  border-radius: 14px;
  background: var(--fill);
  border: 1px solid var(--separator);
}
.otp-row {
  display: flex;
  align-items: center;
  gap: 12px;
}
.otp-label {
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  opacity: 0.6;
}
.otp-code {
  font-size: 28px;
  font-weight: 700;
  letter-spacing: 0.18em;
  font-variant-numeric: tabular-nums;
  flex: 1;
}
.otp-copy {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  border: 1px solid var(--separator);
  background: var(--bg);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
}
.otp-copy .icon { width: 18px; height: 18px; }
.otp-copy:active { transform: scale(0.94); }
.otp-link {
  display: inline-block;
  margin-top: 10px;
  padding: 10px 18px;
  border-radius: 12px;
  background: var(--text);
  color: var(--bg);
  font-weight: 600;
  font-size: 14px;
  text-decoration: none;
}