:root {
  color-scheme: dark;
  --bg: #050506;
  --bg-2: #0b0b0e;
  --surface: rgba(17, 17, 21, 0.94);
  --surface-2: rgba(25, 24, 28, 0.9);
  --surface-3: rgba(36, 18, 22, 0.62);
  --line: rgba(255, 255, 255, 0.14);
  --line-strong: rgba(255, 255, 255, 0.26);
  --text: #f2efea;
  --muted: #aaa39d;
  --faint: #746e6a;
  --red: #d52232;
  --red-2: #ff4050;
  --gold: #d3b061;
  --ok: #b9cf8a;
  --warn: #e7b75e;
  --bad: #ff7b89;
  --radius: 8px;
  --radius-sm: 5px;
  --shadow: 0 18px 46px rgba(0, 0, 0, 0.46);
  --font: "Segoe UI", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  min-height: 100%;
  background: var(--bg);
}

body {
  min-height: 100vh;
  margin: 0;
  color: var(--text);
  background:
    linear-gradient(120deg, rgba(213, 34, 50, 0.16), transparent 30%),
    radial-gradient(circle at 82% 10%, rgba(211, 176, 97, 0.1), transparent 25%),
    repeating-linear-gradient(135deg, rgba(255, 255, 255, 0.032) 0 1px, transparent 1px 18px),
    var(--bg);
  font-family: var(--font);
  line-height: 1.55;
  letter-spacing: 0;
  overflow-x: hidden;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: -1;
  background:
    linear-gradient(90deg, transparent 0 7%, rgba(255, 255, 255, 0.035) 7% 7.2%, transparent 7.2% 100%),
    linear-gradient(90deg, transparent 0 71%, rgba(213, 34, 50, 0.13) 71% 71.25%, transparent 71.25% 100%);
}

a {
  color: inherit;
}

.app-shell {
  min-height: 100vh;
  padding-bottom: 64px;
}

.app-nav {
  position: sticky;
  top: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  min-height: 66px;
  padding: 12px clamp(16px, 4vw, 34px);
  background: rgba(5, 5, 7, 0.9);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(14px);
  box-shadow: 0 12px 28px rgba(0, 0, 0, 0.38);
}

.app-brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
  color: var(--text);
  text-decoration: none;
  font-weight: 700;
}

.app-brand-mark {
  width: 18px;
  height: 34px;
  display: inline-block;
  background: linear-gradient(180deg, var(--red-2), var(--red), transparent);
  clip-path: polygon(42% 0, 100% 0, 58% 100%, 0 100%);
  box-shadow: 0 0 18px rgba(213, 34, 50, 0.32);
}

.app-brand-avatar {
  width: 42px;
  height: 42px;
  object-fit: cover;
  border-radius: var(--radius-sm);
  border: 1px solid var(--line-strong);
  background: var(--surface);
}

.app-brand-text {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.app-nav-toggle {
  display: none;
  width: 42px;
  height: 38px;
  align-items: center;
  justify-content: center;
  gap: 5px;
  flex-direction: column;
  padding: 0;
}

.app-nav-toggle span {
  display: block;
  width: 18px;
  height: 2px;
  background: var(--text);
}

.app-nav-links {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 8px;
  flex-wrap: wrap;
}

.app-nav-links a,
.app-user {
  display: inline-flex;
  align-items: center;
  min-height: 34px;
  padding: 7px 11px;
  color: var(--text);
  background: rgba(255, 255, 255, 0.045);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  text-decoration: none;
  font-size: 0.94rem;
}

.app-nav-links a:hover {
  border-color: rgba(255, 64, 80, 0.75);
  background: rgba(213, 34, 50, 0.18);
}

.app-user {
  color: var(--muted);
}

.app-main {
  width: min(1160px, calc(100vw - 28px));
  margin: clamp(18px, 4vw, 36px) auto;
}

.app-card,
.app-page,
.content,
.content-container {
  background: linear-gradient(180deg, var(--surface), rgba(8, 8, 11, 0.96));
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.app-page {
  position: relative;
  padding: clamp(18px, 3vw, 30px);
  overflow: hidden;
}

.app-page::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 3px;
  background: linear-gradient(var(--red-2), transparent 46%, var(--gold));
}

.app-page-header {
  margin-bottom: 20px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--line);
}

.app-page-header:empty {
  display: none;
}

.app-page-header h1,
.page-title,
.section-title,
.login-title,
.changeinfo-title,
.faq-title,
.userptt-title,
.lottery-title,
.board-title {
  margin: 0 0 16px;
  color: var(--text);
  font-family: var(--font);
  font-size: clamp(1.35rem, 3vw, 2rem);
  line-height: 1.2;
  text-shadow: 0 0 18px rgba(213, 34, 50, 0.26);
}

.app-page-content > :first-child {
  margin-top: 0;
}

.app-flash,
.flash,
.flash-message,
.alert,
.message {
  margin: 14px 0;
  padding: 12px 14px;
  color: var(--text);
  background: rgba(213, 34, 50, 0.14);
  border: 1px solid rgba(255, 64, 80, 0.42);
  border-left: 3px solid var(--red-2);
  border-radius: var(--radius-sm);
}

.app-footer,
.footer {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 90;
  padding: 12px 18px;
  color: var(--muted);
  background: rgba(5, 5, 7, 0.92);
  border-top: 1px solid var(--line);
  text-align: center;
  font-size: 0.9rem;
  backdrop-filter: blur(12px);
}

.container,
.section-card,
.login-card,
.description-box,
.panel,
.card,
.table-container,
.data-card,
.rank-card,
.info-card,
.banner-card,
.store-card,
.form-card,
.faq-item,
.faq-question-btn,
.announcement-item,
.changeinfo-form-card,
.banner-container,
.current-banner,
.banner-item,
.monthly-banner-section,
.monthly-banner-item,
.redeem-container,
.redeem-banner-card,
.chart-item,
.rating-section,
.char-container,
.char-item,
.char-basic,
.char-skill,
.skill-item,
.leaderboard-container,
.course-list,
.course-btn,
.userptt-main-card,
.userptt-background-selection,
.userptt-background-item,
.userptt-b30-container,
.userptt-b30-item,
.calendar-container,
.sign-section,
.result-modal,
.guarantee-panel,
.user-assets,
.friend-card,
.song-card,
.table-section,
.song-table-container,
.unlock-progress-container,
.condition-container,
.sub-condition-container,
.resource-item,
.asset-item,
.summary-item {
  color: var(--text);
  background: linear-gradient(180deg, rgba(20, 20, 25, 0.9), rgba(8, 8, 11, 0.95));
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.28);
}

.section-card,
.container,
.login-card,
.description-box {
  padding: clamp(16px, 2.6vw, 26px);
}

.nav-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 10px;
  padding: 0;
  margin: 0;
  list-style: none;
}

.nav-item a,
button,
input[type="submit"],
input[type="button"],
.submit-btn,
.btn,
.button,
.back-btn,
.action-btn,
.tab-button,
.faq-question-btn,
.search-btn,
.login-submit-btn,
.changeinfo-submit-btn,
.userptt-function-btn,
.userptt-download-btn,
.monthly-buy-btn,
.reset-banner-btn,
.single-draw-btn,
.ten-draw-btn,
.again-btn,
.course-btn,
.makeup-btn,
.modal-btn-group button,
.draw-btns button {
  box-sizing: border-box;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 38px;
  max-width: 100%;
  padding: 9px 13px;
  color: var(--text);
  background: linear-gradient(180deg, rgba(42, 17, 22, 0.78), rgba(13, 12, 15, 0.92));
  border: 1px solid rgba(213, 34, 50, 0.46);
  border-radius: var(--radius-sm);
  text-decoration: none;
  line-height: 1.25;
  font-family: var(--font);
  font-size: 0.96rem;
  cursor: pointer;
  transform: none;
  transition: background 0.16s ease, border-color 0.16s ease, color 0.16s ease;
}

.nav-item a {
  width: 100%;
  justify-content: space-between;
  text-align: left;
}

.nav-item a::after {
  content: ">";
  color: var(--red-2);
  margin-left: 12px;
}

.nav-item a:hover,
button:hover,
input[type="submit"]:hover,
input[type="button"]:hover,
.submit-btn:hover,
.btn:hover,
.button:hover,
.back-btn:hover,
.action-btn:hover,
.tab-button:hover,
.faq-question-btn:hover,
.search-btn:hover,
.login-submit-btn:hover,
.changeinfo-submit-btn:hover,
.userptt-function-btn:hover,
.userptt-download-btn:hover,
.monthly-buy-btn:hover,
.reset-banner-btn:hover,
.single-draw-btn:hover,
.ten-draw-btn:hover,
.again-btn:hover,
.course-btn:hover,
.makeup-btn:hover,
.modal-btn-group button:hover,
.draw-btns button:hover {
  color: #fff;
  background: rgba(213, 34, 50, 0.22);
  border-color: rgba(255, 64, 80, 0.82);
}

.nav-item a:active,
.nav-item a:focus,
button:active,
button:focus,
input[type="submit"]:active,
input[type="submit"]:focus,
input[type="button"]:active,
input[type="button"]:focus,
.submit-btn:active,
.submit-btn:focus,
.btn:active,
.btn:focus,
.button:active,
.button:focus,
.back-btn:active,
.back-btn:focus,
.action-btn:active,
.action-btn:focus,
.tab-button:active,
.tab-button:focus,
.faq-question-btn:active,
.faq-question-btn:focus,
.search-btn:active,
.search-btn:focus,
.login-submit-btn:active,
.login-submit-btn:focus,
.changeinfo-submit-btn:active,
.changeinfo-submit-btn:focus,
.userptt-function-btn:active,
.userptt-function-btn:focus,
.userptt-download-btn:active,
.userptt-download-btn:focus,
.monthly-buy-btn:active,
.monthly-buy-btn:focus,
.reset-banner-btn:active,
.reset-banner-btn:focus,
.single-draw-btn:active,
.single-draw-btn:focus,
.ten-draw-btn:active,
.ten-draw-btn:focus,
.again-btn:active,
.again-btn:focus,
.course-btn:active,
.course-btn:focus,
.makeup-btn:active,
.makeup-btn:focus {
  transform: none;
  outline: 2px solid rgba(255, 64, 80, 0.42);
  outline-offset: 2px;
}

form {
  margin: 0;
}

label,
.label,
.meta,
.captcha-tip,
.announcement-date,
.announcement-content,
.faq-answer-text,
.example-hint,
.empty-tip,
.no-data {
  color: var(--muted);
}

input,
select,
textarea {
  width: auto;
  max-width: 100%;
  color: var(--text);
  background: rgba(0, 0, 0, 0.46);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  padding: 9px 11px;
  font: inherit;
}

input[type="text"],
input[type="password"],
input[type="email"],
input[type="number"],
input[type="datetime-local"],
select,
textarea,
.search-input,
.login-input,
.changeinfo-input,
.redeem-input {
  width: 100%;
}

input:focus,
select:focus,
textarea:focus {
  outline: 2px solid rgba(255, 64, 80, 0.35);
  outline-offset: 1px;
  border-color: rgba(255, 64, 80, 0.72);
}

table,
.leaderboard-table,
.rank-table,
.song-table,
.char-level-table {
  width: 100%;
  color: var(--text);
  background: rgba(8, 8, 11, 0.94);
  border: 1px solid var(--line);
  border-collapse: collapse;
  border-radius: var(--radius);
  overflow: hidden;
}

th,
td {
  padding: 10px 12px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  text-align: left;
}

th {
  color: var(--muted);
  background: rgba(213, 34, 50, 0.16);
  font-weight: 700;
}

tr:hover td,
.table-row:hover td {
  background: rgba(213, 34, 50, 0.08);
}

img {
  max-width: 100%;
}

.char-icon,
.char-card-icon,
.banner-item-img,
.current-banner-img,
.monthly-banner-img,
.redeem-banner-img,
.userptt-background-icon,
.announcement-image {
  border-radius: var(--radius-sm);
  border: 1px solid var(--line);
  background: var(--surface);
}

.rating-value,
.b30-rating,
.course-ptt,
.resource-value,
.asset-value,
.result-value,
.summary-final-ticket,
.summary-gain-banner,
.summary-gain-monthly-banner,
.userptt-value {
  color: var(--gold);
}

.owned,
.owned-banner,
.status-owned,
.completed,
.passed,
.success,
.checkbox-checked {
  color: var(--ok);
}

.unowned-banner,
.status-unowned,
.unplayed,
.error,
.code-error,
.flash-error,
.checkbox-unchecked {
  color: var(--bad);
}

.progress-track,
.horizon-progress-section,
.vertical-progress,
.guarantee-progress {
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid var(--line);
}

.progress-fill,
.horizon-progress-inner,
.month-extra-bar,
.guarantee-remaining {
  background: linear-gradient(90deg, var(--red), var(--gold));
}

.hidden,
[hidden] {
  display: none !important;
}

::-webkit-scrollbar {
  width: 10px;
  height: 10px;
}

::-webkit-scrollbar-track {
  background: #07070a;
}

::-webkit-scrollbar-thumb {
  background: #3d1118;
  border: 2px solid #07070a;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--red);
}

@media (max-width: 760px) {
  .app-nav {
    align-items: flex-start;
    flex-wrap: wrap;
  }

  .app-nav-toggle {
    display: inline-flex;
  }

  .app-nav-links {
    display: none;
    width: 100%;
    justify-content: stretch;
  }

  .app-nav.is-open .app-nav-links {
    display: grid;
    grid-template-columns: 1fr;
  }

  .app-nav-links a,
  .app-user {
    width: 100%;
  }

  .app-main {
    width: calc(100vw - 18px);
    margin-top: 12px;
  }

  .app-page {
    padding: 16px;
  }

  .nav-list {
    grid-template-columns: 1fr;
  }
}