:root {
  color-scheme: dark;
  --bg: #070b10;
  --bg-soft: #0d141d;
  --panel: rgba(14, 22, 31, 0.88);
  --panel-strong: rgba(18, 29, 40, 0.96);
  --line: rgba(153, 181, 207, 0.16);
  --line-strong: rgba(153, 181, 207, 0.28);
  --text: #edf4f7;
  --muted: #91a1ad;
  --faint: #61717d;
  --amber: #d9ae69;
  --amber-strong: #f0c27a;
  --teal: #80d7ca;
  --danger: #ee7c73;
  --ok: #9ddc9d;
  --shadow: 0 18px 60px rgba(0, 0, 0, 0.36);
  --body-gradient: linear-gradient(180deg, rgba(7, 11, 16, 0.28), var(--bg) 72%);
  --copy: #b8c6d0;
  --label: #b6c4cf;
  --field-bg: rgba(5, 10, 15, 0.72);
  --subtle-bg: rgba(255, 255, 255, 0.03);
  --subtle-bg-2: rgba(255, 255, 255, 0.025);
  --hover-bg: rgba(255, 255, 255, 0.04);
  --teal-tint: rgba(128, 215, 202, 0.1);
  --teal-tint-weak: rgba(128, 215, 202, 0.07);
  --teal-border: rgba(128, 215, 202, 0.5);
  --teal-focus: rgba(128, 215, 202, 0.72);
  --teal-focus-ring: rgba(128, 215, 202, 0.12);
  --amber-border: rgba(217, 174, 105, 0.46);
  --amber-border-strong: rgba(240, 194, 122, 0.8);
  --amber-tint: rgba(240, 194, 122, 0.18);
  --amber-tint-soft: rgba(217, 174, 105, 0.08);
  --amber-hover: rgba(217, 174, 105, 0.18);
  --amber-glow: rgba(240, 194, 122, 0.56);
  --primary-text: #ffe1ae;
  --chip-text: #cbd8e1;
  --soft-text: #cbd8df;
  --reader-text: #e6eef2;
  --toast-bg: rgba(12, 20, 29, 0.94);
  --sidebar-bg: rgba(6, 11, 16, 0.84);
  --paper: rgba(245, 239, 222, 0.07);
  --paper-line: rgba(240, 194, 122, 0.12);
  --paper-shadow: 0 18px 46px rgba(0, 0, 0, 0.22);
  --bottom-nav-height: 72px;
  --radius: 8px;
  --sidebar: 248px;
  font-family: "Inter", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
}

html[data-theme="light"] {
  color-scheme: light;
  --bg: #f5f2ed;
  --bg-soft: #eae6df;
  --panel: rgba(255, 253, 248, 0.92);
  --panel-strong: rgba(255, 253, 248, 0.98);
  --line: rgba(100, 80, 60, 0.12);
  --line-strong: rgba(100, 80, 60, 0.22);
  --text: #1a1612;
  --muted: #6b5d4f;
  --faint: #9a8b7a;
  --amber: #b8862d;
  --amber-strong: #d4a044;
  --teal: #2a8a7a;
  --danger: #c04030;
  --ok: #3a8a3a;
  --shadow: 0 18px 48px rgba(75, 57, 36, 0.14);
  --body-gradient: linear-gradient(180deg, rgba(245, 242, 237, 0.9), var(--bg) 72%);
  --copy: #5f5549;
  --label: #6b5d4f;
  --field-bg: rgba(255, 253, 248, 0.9);
  --subtle-bg: rgba(100, 80, 60, 0.045);
  --subtle-bg-2: rgba(100, 80, 60, 0.035);
  --hover-bg: rgba(42, 138, 122, 0.07);
  --teal-tint: rgba(42, 138, 122, 0.1);
  --teal-tint-weak: rgba(42, 138, 122, 0.08);
  --teal-border: rgba(42, 138, 122, 0.42);
  --teal-focus: rgba(42, 138, 122, 0.68);
  --teal-focus-ring: rgba(42, 138, 122, 0.14);
  --amber-border: rgba(184, 134, 45, 0.44);
  --amber-border-strong: rgba(184, 134, 45, 0.7);
  --amber-tint: rgba(212, 160, 68, 0.2);
  --amber-tint-soft: rgba(212, 160, 68, 0.09);
  --amber-hover: rgba(212, 160, 68, 0.16);
  --amber-glow: rgba(184, 134, 45, 0.32);
  --primary-text: #3b2a12;
  --chip-text: #51463b;
  --soft-text: #433a31;
  --reader-text: #261f19;
  --toast-bg: rgba(255, 253, 248, 0.98);
  --sidebar-bg: rgba(255, 253, 248, 0.86);
  --paper: rgba(255, 252, 244, 0.96);
  --paper-line: rgba(184, 134, 45, 0.13);
  --paper-shadow: 0 16px 42px rgba(75, 57, 36, 0.12);
}

* {
  box-sizing: border-box;
}

html,
body {
  min-height: 100%;
}

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

body {
  margin: 0;
  background:
    var(--body-gradient),
    url("/static/assets/night-sky.svg") center top / cover fixed,
    var(--bg);
  color: var(--text);
  letter-spacing: 0;
  overflow-x: hidden;
}

button,
input,
select,
textarea {
  font: inherit;
}

button {
  cursor: pointer;
  touch-action: manipulation;
}

.hidden {
  display: none !important;
}

.toast {
  position: fixed;
  right: 24px;
  bottom: max(24px, env(safe-area-inset-bottom));
  z-index: 100;
  max-width: min(420px, calc(100vw - 32px));
  padding: 12px 14px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  background: var(--toast-bg);
  color: var(--text);
  box-shadow: var(--shadow);
  opacity: 0;
  transform: translateY(8px);
  pointer-events: none;
  transition: opacity 0.18s ease, transform 0.18s ease;
}

.toast.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.auth-view {
  min-height: 100vh;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(360px, 440px);
  gap: 56px;
  align-items: center;
  width: min(1120px, calc(100vw - 40px));
  margin: 0 auto;
  padding: 56px 0;
}

.auth-copy {
  max-width: 620px;
}

.brand-mark {
  color: var(--amber-strong);
  font-size: 28px;
  font-weight: 700;
  margin-bottom: 32px;
}

.auth-copy h1 {
  margin: 0;
  max-width: 560px;
  font-size: clamp(38px, 6vw, 72px);
  line-height: 1.04;
  font-weight: 740;
}

.auth-copy p {
  margin: 22px 0 0;
  max-width: 520px;
  color: var(--copy);
  font-size: 18px;
  line-height: 1.8;
}

.auth-panel,
.admin-panel,
.mail-list-panel,
.reader-panel {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
  box-shadow: var(--shadow);
  backdrop-filter: blur(18px);
}

.auth-panel {
  padding: 18px;
}

.theme-row {
  display: flex;
  justify-content: flex-end;
  margin-bottom: 12px;
}

.theme-control {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--muted);
  font-size: 13px;
  white-space: nowrap;
}

.theme-select {
  width: auto;
  min-width: 142px;
  min-height: 44px;
  padding: 9px 12px;
}

.auth-tabs {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 6px;
  padding: 4px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--subtle-bg);
}

.auth-tab,
.nav-button,
.ghost-button,
.icon-button,
.primary-button,
.danger-button,
.letter-filter-button {
  min-height: 44px;
  border-radius: 7px;
  border: 1px solid transparent;
  color: var(--text);
  background: transparent;
  transition: border-color 0.16s ease, background 0.16s ease, color 0.16s ease, transform 0.1s ease;
}

.auth-tab:active,
.nav-button:active,
.ghost-button:active,
.icon-button:active,
.primary-button:active,
.danger-button:active,
.letter-filter-button:active,
.admin-tab-button:active,
.admin-player-button:active,
.lore-category-button:active,
.lore-entry-card:active {
  transform: translateY(1px) scale(0.99);
}

.auth-tab,
.letter-filter-button {
  color: var(--muted);
}

.auth-tab.is-active,
.nav-button.is-active,
.letter-filter-button.is-active {
  color: var(--text);
  border-color: var(--line-strong);
  background: var(--teal-tint);
}

.auth-form {
  display: grid;
  gap: 14px;
  margin-top: 18px;
}

label {
  display: grid;
  gap: 8px;
  color: var(--label);
  font-size: 14px;
}

input,
select,
textarea {
  width: 100%;
  min-width: 0;
  min-height: 44px;
  border: 1px solid var(--line);
  border-radius: 7px;
  background: var(--field-bg);
  color: var(--text);
  padding: 11px 12px;
  outline: none;
  font-size: 14px;
  scroll-margin-bottom: 120px;
}

textarea {
  resize: vertical;
  line-height: 1.7;
}

input:focus,
select:focus,
textarea:focus {
  border-color: var(--teal-focus);
  box-shadow: 0 0 0 3px var(--teal-focus-ring);
}

.primary-button {
  border-color: var(--amber-border);
  background: linear-gradient(180deg, var(--amber-tint), var(--amber-tint-soft));
  color: var(--primary-text);
  font-weight: 650;
}

.primary-button:hover {
  border-color: var(--amber-border-strong);
  background: var(--amber-hover);
}

.danger-button {
  border-color: rgba(192, 64, 48, 0.38);
  background: transparent;
  color: var(--danger);
  font-weight: 650;
}

.danger-button:hover {
  border-color: var(--danger);
  background: rgba(192, 64, 48, 0.1);
}

.primary-button:disabled,
.ghost-button:disabled {
  cursor: not-allowed;
  opacity: 0.55;
}

.ghost-button {
  width: 100%;
  border-color: var(--line);
  color: var(--muted);
}

.ghost-button:hover,
.icon-button:hover,
.nav-button:hover,
.letter-filter-button:hover {
  border-color: var(--line-strong);
  background: var(--hover-bg);
  color: var(--text);
}

.icon-button {
  width: 44px;
  min-width: 44px;
  border-color: var(--line);
  color: var(--muted);
}

.app-shell {
  min-height: 100vh;
  display: grid;
  grid-template-columns: var(--sidebar) minmax(0, 1fr);
}

.sidebar {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 22px;
  padding: 24px 18px;
  border-right: 1px solid var(--line);
  background: var(--sidebar-bg);
  backdrop-filter: blur(16px);
}

.brand-row {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 18px;
  font-weight: 760;
}

.brand-sigil {
  display: inline-grid;
  place-items: center;
  width: 30px;
  height: 30px;
  border: 1px solid var(--amber-border);
  border-radius: 7px;
  color: var(--amber-strong);
}

.player-meta {
  margin-top: 22px;
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--subtle-bg-2);
}

.player-meta strong {
  display: block;
  margin-bottom: 6px;
  font-size: 16px;
}

.player-meta span {
  display: block;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.55;
}

.side-nav {
  display: grid;
  gap: 8px;
  margin-top: 22px;
}

.nav-button {
  display: flex;
  align-items: center;
  gap: 10px;
  justify-content: flex-start;
  padding: 0 12px;
  color: var(--muted);
}

.main-column {
  min-width: 0;
  padding: 24px;
}

.topbar,
.admin-topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  margin-bottom: 18px;
}

.topbar-actions,
.admin-topbar-actions {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  flex-wrap: wrap;
  gap: 12px;
}

.small-label,
.muted {
  color: var(--muted);
  font-size: 12px;
}

.topbar h2 {
  margin: 3px 0 0;
  font-size: 28px;
  line-height: 1.15;
}

.status-strip {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 8px;
}

.status-chip {
  min-height: 34px;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 0 10px;
  border: 1px solid var(--line);
  border-radius: 7px;
  background: var(--subtle-bg);
  color: var(--chip-text);
  font-size: 13px;
  white-space: nowrap;
}

.content-grid {
  display: grid;
  grid-template-columns: minmax(300px, 380px) minmax(0, 1fr);
  gap: 16px;
  min-height: calc(100vh - 118px);
}

.mail-list-panel,
.reader-panel {
  min-height: 0;
}

.panel-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 14px;
  border-bottom: 1px solid var(--line);
}

.panel-head h3 {
  margin: 0;
  font-size: 16px;
}

.letter-filters {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 8px;
  padding: 10px 14px;
  border-bottom: 1px solid var(--line);
}

.letter-filter-button {
  min-height: 44px;
  background: var(--subtle-bg-2);
  font-size: 14px;
}

.letter-list {
  max-height: calc(100vh - 238px);
  overflow: auto;
  -webkit-overflow-scrolling: touch;
}

.letter-row {
  width: 100%;
  display: grid;
  grid-template-columns: 12px minmax(0, 1fr);
  gap: 12px;
  min-height: 96px;
  padding: 14px;
  border: 0;
  border-left: 4px solid transparent;
  border-bottom: 1px solid var(--line);
  background: transparent;
  color: inherit;
  text-align: left;
}

.letter-row:hover,
.letter-row.is-selected {
  background: var(--teal-tint-weak);
}

.letter-dot {
  width: 10px;
  height: 10px;
  margin-top: 6px;
  border-radius: 50%;
  background: var(--faint);
}

.letter-row.is-unread {
  border-left-color: var(--amber-strong);
  background: var(--amber-tint-soft);
}

.letter-row.is-unread .letter-dot {
  background: var(--amber-strong);
  box-shadow: 0 0 16px var(--amber-glow);
}

.letter-row.is-pending .letter-dot {
  background: var(--teal);
}

.letter-title-line {
  display: flex;
  justify-content: space-between;
  gap: 10px;
  min-width: 0;
}

.letter-title-line strong {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-size: 15px;
}

.letter-title-line span {
  flex: 0 0 auto;
  color: var(--faint);
  font-size: 12px;
}

.letter-subject {
  margin-top: 4px;
  color: var(--soft-text);
  font-size: 14px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.letter-preview {
  margin-top: 6px;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.55;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.reader-panel {
  display: flex;
  flex-direction: column;
  min-width: 0;
  overflow: hidden;
  position: relative;
}

.reader-empty,
.reader-locked,
.settings-view,
.compose-view {
  padding: 28px;
}

.reader-head {
  padding: 20px 22px 14px;
  border-bottom: 1px solid var(--line);
}

.reader-head h2 {
  margin: 6px 0 0;
  font-size: 24px;
  line-height: 1.25;
}

.reader-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  color: var(--muted);
  font-size: 13px;
}

.reader-body {
  flex: 1;
  overflow: auto;
  margin: 18px;
  padding: 28px;
  border: 1px solid var(--paper-line);
  border-radius: var(--radius);
  background:
    linear-gradient(transparent 31px, var(--paper-line) 32px),
    var(--paper);
  background-size: 100% 32px, auto;
  box-shadow: var(--paper-shadow);
  color: var(--reader-text);
  font-size: 17px;
  line-height: 2;
  -webkit-overflow-scrolling: touch;
}

.reader-body p {
  margin: 0 0 18px;
}

.reader-actions {
  display: flex;
  justify-content: flex-end;
  gap: 10px;
  padding: 14px;
  border-top: 1px solid var(--line);
}

.reader-actions:empty {
  display: none;
}

.pending-banner {
  display: grid;
  gap: 4px;
  margin-top: 12px;
  padding: 12px;
  border: 1px solid var(--amber-border);
  border-radius: var(--radius);
  background: var(--amber-tint-soft);
  color: var(--soft-text);
  font-size: 14px;
  line-height: 1.55;
}

.pending-banner strong {
  color: var(--amber-strong);
}

.compose-view h2,
.settings-view h2 {
  margin: 0 0 16px;
}

.compose-form {
  display: grid;
  gap: 14px;
}

.compose-form textarea {
  min-height: 280px;
}

.compose-meta {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
}

.char-counter {
  color: var(--muted);
  font-size: 13px;
  line-height: 1.6;
  white-space: nowrap;
}

.char-counter.is-short {
  color: var(--danger);
}

.reply-dock {
  display: grid;
  gap: 10px;
  padding: 12px 14px 14px;
  border-top: 1px solid var(--line);
  background: var(--panel-strong);
}

.reply-label {
  gap: 6px;
}

.reply-dock textarea {
  min-height: 86px;
  max-height: 180px;
}

.reply-dock-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.reply-dock-footer .primary-button {
  min-width: 112px;
  padding: 0 16px;
}

.quota-note {
  color: var(--muted);
  font-size: 14px;
  line-height: 1.6;
}

.settings-theme-control {
  display: none;
}

.mobile-only {
  display: none;
}

.admin-shell {
  min-height: 100vh;
  width: min(1320px, calc(100vw - 40px));
  margin: 0 auto;
  padding: 24px 0 40px;
}

.admin-topbar {
  padding: 18px 0;
}

.admin-topbar p {
  margin: 8px 0 0;
  color: var(--muted);
}

.admin-topbar .ghost-button {
  width: auto;
  padding: 0 14px;
}

.admin-tabs {
  display: inline-flex;
  gap: 6px;
  margin: 0 0 16px;
  padding: 4px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--subtle-bg);
}

.admin-tab-button {
  min-height: 44px;
  padding: 0 16px;
  border: 1px solid transparent;
  border-radius: 7px;
  background: transparent;
  color: var(--muted);
}

.admin-tab-button:hover,
.admin-tab-button.is-active {
  border-color: var(--line-strong);
  background: var(--teal-tint);
  color: var(--text);
}

.admin-grid {
  display: grid;
  grid-template-columns: 340px minmax(0, 1fr);
  gap: 16px;
}

.admin-panel {
  padding-bottom: 14px;
}

.admin-wide {
  grid-column: span 1;
}

.admin-list,
.admin-letters,
.event-list {
  display: grid;
  gap: 8px;
  padding: 14px;
  max-height: 520px;
  overflow: auto;
}

.admin-player-card {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 92px;
  gap: 8px;
}

.admin-player-button {
  width: 100%;
  min-height: 56px;
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--subtle-bg-2);
  color: var(--text);
  text-align: left;
}

.admin-player-button:hover,
.admin-player-button.is-selected {
  border-color: var(--teal-border);
  background: var(--teal-tint-weak);
}

.admin-player-button strong {
  display: block;
  margin-bottom: 6px;
}

.admin-player-button span,
.admin-letter span,
.event-item span {
  color: var(--muted);
  font-size: 13px;
  line-height: 1.5;
}

.advance-button {
  width: auto;
  min-height: 44px;
  padding: 0 8px;
  font-size: 14px;
}

.admin-letter,
.event-item {
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--subtle-bg-2);
}

.admin-letter strong,
.event-item strong {
  display: block;
  margin-bottom: 6px;
}

.admin-letter p,
.event-item p {
  margin: 8px 0 0;
  color: var(--soft-text);
  line-height: 1.7;
}

.lore-admin-layout {
  display: grid;
  grid-template-columns: 240px minmax(0, 1fr);
  gap: 16px;
}

.lore-category-list {
  display: grid;
  gap: 8px;
  padding: 14px;
}

.lore-category-button {
  min-height: 44px;
  padding: 0 12px;
  border: 1px solid var(--line);
  border-radius: 7px;
  background: var(--subtle-bg-2);
  color: var(--muted);
  text-align: left;
}

.lore-category-button:hover,
.lore-category-button.is-active {
  border-color: var(--teal-border);
  background: var(--teal-tint-weak);
  color: var(--text);
}

.lore-main {
  min-width: 0;
}

.lore-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding: 14px;
  border-bottom: 1px solid var(--line);
}

.lore-toolbar h3 {
  margin: 0 0 4px;
}

.lore-toolbar-actions {
  display: flex;
  align-items: end;
  justify-content: flex-end;
  flex-wrap: wrap;
  gap: 10px;
}

.lore-search-label {
  min-width: min(260px, 100%);
}

.lore-list {
  display: grid;
  gap: 8px;
  padding: 14px;
  max-height: 420px;
  overflow: auto;
}

.lore-entry-card {
  width: 100%;
  display: grid;
  gap: 8px;
  min-height: 64px;
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--subtle-bg-2);
  color: var(--text);
  text-align: left;
}

.lore-entry-card:hover,
.lore-entry-card.is-selected {
  border-color: var(--teal-border);
  background: var(--teal-tint-weak);
}

.lore-entry-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.lore-entry-head strong {
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.lore-tags {
  display: flex;
  flex: 0 0 auto;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 6px;
}

.lore-tag {
  display: inline-flex;
  align-items: center;
  min-height: 28px;
  padding: 0 8px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--muted);
  font-size: 13px;
}

.lore-tag.is-known {
  border-color: var(--teal-border);
  color: var(--teal);
}

.lore-tag.is-hidden {
  border-color: rgba(192, 64, 48, 0.4);
  color: var(--danger);
}

.lore-tag.is-found {
  border-color: rgba(58, 138, 58, 0.4);
  color: var(--ok);
}

.lore-preview {
  color: var(--muted);
  font-size: 13px;
  line-height: 1.6;
}

.lore-form {
  display: grid;
  gap: 12px;
  padding: 14px;
  border-top: 1px solid var(--line);
}

.lore-form-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.lore-form-actions {
  display: flex;
  justify-content: flex-end;
  flex-wrap: wrap;
  gap: 10px;
}

.lore-form-actions .ghost-button,
.lore-form-actions .danger-button {
  width: auto;
  padding: 0 14px;
}

.form-panel {
  display: grid;
  gap: 12px;
  padding: 16px;
}

.form-panel h3 {
  margin: 0;
}

.admin-settings-panel {
  max-width: 560px;
}

.admin-settings-panel fieldset {
  display: grid;
  gap: 12px;
  margin: 0;
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.admin-settings-panel legend {
  padding: 0 6px;
  color: var(--soft-text);
  font-size: 13px;
}

.delay-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

@media (max-width: 980px) {
  .auth-view {
    grid-template-columns: 1fr;
    gap: 30px;
    align-items: start;
  }

  .auth-copy h1 {
    font-size: 44px;
  }

  .app-shell {
    grid-template-columns: 1fr;
  }

  .sidebar {
    position: sticky;
    top: 0;
    z-index: 20;
    display: grid;
    grid-template-columns: 1fr;
    padding: 14px;
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .player-meta {
    margin-top: 12px;
  }

  .side-nav {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    margin-top: 12px;
  }

  .nav-button {
    justify-content: center;
    padding: 0 8px;
  }

  .main-column {
    padding: 16px;
  }

  .topbar {
    align-items: flex-start;
    flex-direction: column;
  }

  .topbar-actions {
    justify-content: flex-start;
  }

  .status-strip {
    justify-content: flex-start;
  }

  .content-grid {
    grid-template-columns: 1fr;
    min-height: auto;
  }

  .letter-list {
    max-height: 42vh;
  }

  .reader-panel {
    min-height: 60vh;
  }

  .admin-grid {
    grid-template-columns: 1fr;
  }

  .lore-admin-layout {
    grid-template-columns: 1fr;
  }

  .admin-player-card {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 700px) {
  body {
    background-attachment: scroll;
  }

  .toast {
    right: 12px;
    left: 12px;
    bottom: calc(var(--bottom-nav-height) + env(safe-area-inset-bottom) + 12px);
    max-width: none;
    font-size: 14px;
  }

  .app-shell {
    display: block;
    min-height: 100svh;
    padding-bottom: calc(var(--bottom-nav-height) + env(safe-area-inset-bottom));
  }

  .sidebar {
    position: fixed;
    inset: auto 0 0 0;
    top: auto;
    z-index: 40;
    display: block;
    padding: 8px 10px calc(8px + env(safe-area-inset-bottom));
    border-top: 1px solid var(--line-strong);
    border-right: 0;
    border-bottom: 0;
    box-shadow: 0 -12px 34px rgba(0, 0, 0, 0.24);
  }

  .sidebar > div:first-child,
  #logoutButton {
    display: none;
  }

  .side-nav {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 8px;
    margin: 0;
  }

  .nav-button {
    min-height: 56px;
    flex-direction: column;
    justify-content: center;
    gap: 3px;
    padding: 6px 4px;
    font-size: 14px;
    line-height: 1.1;
  }

  .nav-button span:first-child {
    font-size: 18px;
    line-height: 1;
  }

  .main-column {
    padding: 12px;
  }

  .topbar {
    gap: 12px;
    margin-bottom: 12px;
  }

  .topbar-actions,
  .status-strip,
  .topbar .theme-control {
    width: 100%;
  }

  .status-strip {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 8px;
  }

  .status-chip {
    min-height: 38px;
    justify-content: center;
    white-space: normal;
    text-align: center;
    font-size: 14px;
  }

  .theme-control {
    font-size: 14px;
  }

  .theme-select {
    min-height: 48px;
    font-size: 16px;
  }

  .content-grid {
    display: block;
  }

  #playerView[data-section="compose"] .mail-list-panel,
  #playerView[data-section="settings"] .mail-list-panel {
    display: none;
  }

  #playerView[data-section="compose"] .reader-panel,
  #playerView[data-section="settings"] .reader-panel {
    min-height: calc(100svh - 176px - var(--bottom-nav-height));
  }

  .mail-list-panel {
    position: relative;
    margin-bottom: 14px;
    overflow: hidden;
  }

  .mail-list-panel::before {
    content: attr(data-pull-label);
    position: absolute;
    top: 0;
    left: 14px;
    right: 14px;
    z-index: 1;
    height: 42px;
    display: grid;
    place-items: center;
    border-bottom: 1px solid var(--line);
    color: var(--muted);
    font-size: 14px;
    opacity: 0;
    transform: translateY(-44px);
    transition: opacity 0.16s ease, transform 0.16s ease;
  }

  .mail-list-panel.is-pulling::before,
  .mail-list-panel.is-refreshing::before {
    opacity: 1;
    transform: translateY(0);
  }

  .mail-list-panel.is-pulling .letter-list,
  .mail-list-panel.is-refreshing .letter-list {
    transform: translateY(var(--pull-distance, 0));
  }

  .letter-list {
    display: grid;
    gap: 10px;
    max-height: none;
    padding: 12px;
    overflow: visible;
    transition: transform 0.16s ease;
  }

  .letter-row {
    min-height: 112px;
    padding: 14px;
    border: 1px solid var(--line);
    border-left: 5px solid transparent;
    border-radius: var(--radius);
    background: var(--subtle-bg-2);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12);
  }

  .letter-row.is-unread {
    border-left-color: var(--amber-strong);
  }

  .letter-title-line {
    align-items: flex-start;
  }

  .letter-title-line span {
    max-width: 38%;
    white-space: normal;
    text-align: right;
    font-size: 14px;
    line-height: 1.35;
  }

  .letter-title-line strong {
    font-size: 16px;
  }

  .letter-subject {
    font-size: 15px;
  }

  .letter-preview {
    font-size: 14px;
    line-height: 1.65;
    -webkit-line-clamp: 3;
  }

  .reader-panel {
    min-height: 56svh;
    overflow: visible;
  }

  .reader-empty,
  .reader-locked,
  .settings-view,
  .compose-view {
    padding: 18px;
  }

  .reader-head {
    padding: 18px;
  }

  .reader-meta {
    font-size: 14px;
    line-height: 1.5;
  }

  .reader-body {
    margin: 12px;
    padding: 22px 18px;
    overflow: visible;
    font-size: 16px;
    line-height: 1.9;
    background-size: 100% 30px, auto;
  }

  .reader-body p {
    margin-bottom: 16px;
  }

  .reader-panel.has-reply-dock {
    padding-bottom: 210px;
  }

  .reply-dock {
    position: fixed;
    left: 12px;
    right: 12px;
    bottom: calc(var(--bottom-nav-height) + env(safe-area-inset-bottom) + 8px);
    z-index: 35;
    padding: 12px;
    border: 1px solid var(--line-strong);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
  }

  .reply-dock textarea {
    min-height: 78px;
    max-height: 18svh;
    font-size: 16px;
  }

  .reply-dock-footer {
    align-items: stretch;
  }

  .reply-dock-footer .primary-button {
    min-height: 48px;
    min-width: 116px;
  }

  .compose-form textarea {
    min-height: max(50svh, 320px);
    font-size: 16px;
  }

  .compose-meta {
    display: grid;
    gap: 6px;
  }

  .char-counter,
  .quota-note,
  .small-label,
  .muted,
  .admin-player-button span,
  .admin-letter span,
  .event-item span,
  .admin-settings-panel legend,
  .lore-tag {
    font-size: 14px;
  }

  .compose-form .primary-button,
  .settings-view .primary-button,
  .settings-view .ghost-button,
  .reader-actions .ghost-button {
    width: 100%;
    min-height: 48px;
  }

  .settings-view {
    display: grid;
    gap: 12px;
  }

  .settings-theme-control {
    display: grid;
  }

  .mobile-only {
    display: inline-flex;
    align-items: center;
    justify-content: center;
  }

  .auth-view {
    min-height: 100svh;
    width: min(100vw - 24px, 100%);
    gap: 18px;
    padding: max(16px, env(safe-area-inset-top)) 0 max(18px, env(safe-area-inset-bottom));
  }

  .brand-mark {
    margin-bottom: 16px;
    font-size: 24px;
  }

  .auth-copy h1 {
    font-size: 34px;
    line-height: 1.08;
  }

  .auth-copy p {
    margin-top: 14px;
    font-size: 16px;
    line-height: 1.65;
  }

  .auth-panel {
    padding: 14px;
  }

  .auth-tab {
    min-height: 48px;
    font-size: 15px;
  }

  input,
  select,
  textarea {
    min-height: 48px;
    font-size: 16px;
  }

  .admin-shell {
    width: min(100vw - 24px, 100%);
    padding: 12px 0 max(28px, env(safe-area-inset-bottom));
  }

  .admin-topbar {
    gap: 12px;
    padding: 10px 0;
  }

  .admin-topbar-actions,
  .admin-topbar-actions .theme-control,
  .admin-topbar .ghost-button {
    width: 100%;
  }

  .admin-tabs {
    width: 100%;
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .admin-tab-button {
    min-height: 48px;
    padding: 0 6px;
    font-size: 14px;
  }

  .admin-grid,
  .lore-admin-layout {
    gap: 12px;
  }

  .admin-list,
  .admin-letters,
  .event-list,
  .lore-list {
    max-height: none;
    overflow: visible;
  }

  .admin-panel {
    border-radius: var(--radius);
  }

  .admin-player-card {
    grid-template-columns: 1fr;
  }

  .advance-button {
    width: 100%;
    min-height: 48px;
  }

  .admin-letter p,
  .event-item p,
  .lore-preview {
    font-size: 14px;
  }

  .lore-category-list {
    display: flex;
    gap: 8px;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
  }

  .lore-category-button {
    flex: 0 0 auto;
    min-width: 76px;
  }

  .lore-toolbar-actions {
    display: grid;
    width: 100%;
  }

  .lore-search-label,
  .admin-settings-panel {
    max-width: none;
    width: 100%;
  }
}

@media (max-width: 560px) {
  .auth-view,
  .admin-shell {
    width: min(100vw - 24px, 100%);
    padding: max(18px, env(safe-area-inset-top)) 0 max(18px, env(safe-area-inset-bottom));
  }

  .auth-copy h1 {
    font-size: 36px;
  }

  .auth-copy p {
    font-size: 16px;
  }

  .topbar h2,
  .reader-head h2 {
    font-size: 22px;
  }

  .reader-body {
    padding: 18px;
    font-size: 16px;
    line-height: 1.9;
  }

  .reader-actions {
    flex-direction: column;
  }

  .admin-topbar {
    align-items: flex-start;
    flex-direction: column;
  }

  .admin-topbar-actions,
  .lore-toolbar,
  .lore-entry-head {
    align-items: stretch;
    flex-direction: column;
  }

  .admin-topbar-actions,
  .lore-toolbar-actions,
  .lore-tags {
    justify-content: flex-start;
  }

  .theme-control {
    width: 100%;
    justify-content: space-between;
  }

  .theme-select {
    flex: 1;
  }

  .delay-grid {
    grid-template-columns: 1fr;
  }

  .lore-form-grid {
    grid-template-columns: 1fr;
  }
}