:root {
  --bg: #f3f3f1;
  --bg-soft: #fafaf8;
  --bg-elevated: #ffffff;
  --panel: rgba(255, 255, 255, 0.82);
  --panel-strong: rgba(255, 255, 255, 0.94);
  --line: rgba(27, 27, 27, 0.10);
  --line-strong: rgba(27, 27, 27, 0.18);
  --text: #161616;
  --muted: #5f5f5f;
  --dim: #767676;
  --shadow: 0 24px 70px rgba(36, 36, 36, 0.10);
  --radius: 26px;
  --radius-sm: 18px;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
  background: #f2f2ef;
  color: var(--text);
  font-family: "Microsoft YaHei UI", "PingFang SC", sans-serif;
}

body {
  position: relative;
  padding: 18px;
  background:
    radial-gradient(circle at top left, rgba(255, 255, 255, 0.88), transparent 28%),
    radial-gradient(circle at 85% 10%, rgba(225, 225, 225, 0.75), transparent 24%),
    linear-gradient(180deg, #fbfbf9 0%, #f1f1ee 48%, #e8e8e4 100%);
}

.page-backdrop {
  position: fixed;
  inset: 0;
  pointer-events: none;
  background:
    linear-gradient(135deg, rgba(255,255,255,0.65), transparent 30%, transparent 72%, rgba(255,255,255,0.22)),
    repeating-linear-gradient(135deg, rgba(120,120,120,0.035) 0 1px, transparent 1px 22px);
  opacity: 0.75;
}

.hidden {
  display: none !important;
}

.app-header {
  position: sticky;
  top: 18px;
  z-index: 20;
  max-width: 1240px;
  margin: 0 auto 18px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 18px 22px;
  border: 1px solid var(--line);
  border-radius: 24px;
  background: rgba(255, 255, 255, 0.78);
  backdrop-filter: blur(16px);
  box-shadow: var(--shadow);
}

.brand-block {
  display: flex;
  align-items: center;
  gap: 14px;
}

.brand-mark {
  width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  border-radius: 14px;
  border: 1px solid var(--line-strong);
  background: linear-gradient(180deg, #ffffff, #e9e9e6);
  font-weight: 700;
  letter-spacing: 0.08em;
}

.brand-eyebrow,
.panel-kicker,
.mini-label {
  color: var(--dim);
  text-transform: uppercase;
  letter-spacing: 0.16em;
  font-size: 11px;
}

.app-header h1 {
  margin: 2px 0 0;
  font-size: 22px;
  letter-spacing: -0.02em;
}

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

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

.subscription-badge,
.status-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 32px;
  padding: 0 12px;
  border-radius: 999px;
  border: 1px solid var(--line-strong);
  background: rgba(255,255,255,0.95);
  color: var(--text);
  font-size: 12px;
}

.shell {
  position: relative;
  max-width: 1240px;
  margin: 0 auto;
  display: grid;
  gap: 18px;
}

.panel {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 24px;
  background: linear-gradient(180deg, rgba(255,255,255,0.92), rgba(246,246,243,0.96));
  box-shadow: var(--shadow);
  backdrop-filter: blur(12px);
}

.panel::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(135deg, rgba(255,255,255,0.90), transparent 36%, transparent 72%, rgba(210,210,210,0.18));
}

.panel > * {
  position: relative;
  z-index: 1;
}

.panel-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 20px;
}

.panel-head.compact {
  align-items: center;
}

h1,
h2,
h3 {
  margin: 0;
  font-weight: 600;
  letter-spacing: -0.02em;
}

h2 {
  font-size: 28px;
}

h3 {
  font-size: 20px;
}

.subtle,
.hero-copy,
.subscription-summary,
.side-card p,
.empty-video,
.status-box,
.job-meta {
  color: var(--muted);
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(250px, 0.8fr);
  gap: 18px;
  align-items: stretch;
}

.hero-title {
  font-size: clamp(30px, 4.6vw, 48px);
  line-height: 1.06;
  margin-top: 12px;
  margin-bottom: 14px;
}

.hero-copy {
  max-width: 760px;
  line-height: 1.9;
  font-size: 15px;
}

.hero-note,
.side-card,
.metric-card,
.history-item,
.stat-card,
.admin-section,
.status-box,
.job-meta,
.empty-video,
.auth-content,
.qrcode-content {
  border: 1px solid var(--line);
  border-radius: 22px;
  background: rgba(255,255,255,0.78);
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.03);
}

.hero-note {
  padding: 18px;
  display: grid;
  align-content: start;
  gap: 10px;
}

.hero-note-label {
  color: var(--text);
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.16em;
}

.hero-note p,
.side-card p {
  margin: 0;
  line-height: 1.8;
}

.auth-tabs {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px;
  margin-bottom: 14px;
}

.auth-tab {
  padding: 14px 16px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: rgba(250,250,248,0.95);
  text-align: center;
  color: var(--muted);
  cursor: pointer;
  transition: background .2s ease, color .2s ease, border-color .2s ease;
}

.auth-tab.active {
  background: rgba(245,245,243,1);
  color: var(--text);
  border-color: var(--line-strong);
}

.auth-content {
  padding: 20px;
}

.auth-form {
  display: flex;
  flex-direction: column;
  gap: 14px;
  max-width: 460px;
}

.field {
  display: block;
}

.field span {
  display: block;
  margin-bottom: 9px;
  color: var(--muted);
  font-size: 14px;
}

input[type="file"],
input[type="text"],
input[type="password"],
textarea,
.admin-select {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: rgba(255,255,255,0.94);
  color: var(--text);
  padding: 14px 16px;
  font: inherit;
  outline: none;
  transition: border-color .2s ease, background .2s ease, box-shadow .2s ease;
}

input:focus,
textarea:focus,
.admin-select:focus {
  border-color: var(--line-strong);
  background: rgba(255,255,255,0.07);
  box-shadow: 0 0 0 3px rgba(255,255,255,0.06);
}

textarea {
  resize: vertical;
}

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

button,
.button-small,
.admin-action-btn {
  min-height: 44px;
  border-radius: 14px;
  border: 1px solid var(--line-strong);
  background: linear-gradient(180deg, #222222 0%, #4a4a4a 100%);
  color: #ffffff;
  padding: 0 16px;
  font: inherit;
  font-weight: 600;
  cursor: pointer;
  transition: transform .2s ease, opacity .2s ease, background .2s ease;
}

button:hover,
.button-small:hover,
.admin-action-btn:hover {
  transform: translateY(-1px);
}

button.secondary,
.button-small.secondary,
.admin-action-btn.secondary,
.admin-button {
  background: rgba(255,255,255,0.94);
  color: var(--text);
  border-color: var(--line);
}

button:disabled,
.button-small:disabled {
  opacity: 0.55;
  cursor: default;
  transform: none;
}

.error-message,
.error {
  color: #f0f0f0;
  border: 1px solid rgba(255,255,255,0.16);
  border-radius: 14px;
  padding: 12px 14px;
  background: rgba(255,255,255,0.94);
}

.subscription-summary {
  line-height: 1.9;
  margin-bottom: 18px;
}

.subscription-stats,
.admin-stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.metric-card,
.stat-card {
  padding: 18px;
  text-align: left;
}

.stat-value,
.value {
  font-size: clamp(28px, 4vw, 38px);
  line-height: 1;
  margin-bottom: 8px;
  font-weight: 700;
}

.stat-label,
.label,
.stats-loading,
.config-loading {
  color: var(--dim);
}

.payment-panel .subtle {
  max-width: 760px;
  line-height: 1.85;
}

.plans-container {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 18px;
}

.plan-card {
  position: relative;
  overflow: hidden;
  min-height: 100%;
  border: 1px solid var(--line);
  border-radius: 24px;
  padding: 22px;
  background: linear-gradient(180deg, #ffffff, #f4f4f1);
  box-shadow: 0 20px 44px rgba(60,60,60,0.08);
}

.plan-card::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(135deg, rgba(255,255,255,0.08), transparent 28%, transparent 72%, rgba(255,255,255,0.03));
}

.plan-card.featured {
  border-color: rgba(255,255,255,0.24);
  background: linear-gradient(180deg, #f7f7f5, #ecece9);
}

.plan-card.current {
  box-shadow: inset 0 0 0 1px rgba(255,255,255,0.18), 0 20px 50px rgba(0,0,0,0.24);
}

.plan-name,
.plan-price,
.plan-features,
.plan-card p,
.plan-card button {
  position: relative;
  z-index: 1;
}

.plan-name {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 12px;
}

.plan-price {
  font-size: 34px;
  font-weight: 700;
  margin-bottom: 12px;
  letter-spacing: -0.04em;
}

.plan-price .unit {
  font-size: 14px;
  margin-left: 6px;
  color: var(--dim);
  letter-spacing: 0;
}

.plan-card p {
  margin: 0 0 16px;
  color: var(--muted);
  line-height: 1.8;
}

.plan-features {
  list-style: none;
  padding: 0;
  margin: 0 0 18px;
  display: grid;
  gap: 8px;
}

.plan-features li {
  padding: 10px 12px;
  border-radius: 14px;
  background: rgba(255,255,255,0.94);
  color: var(--muted);
}

.tool-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(260px, 0.8fr);
  gap: 18px;
}

.tool-form {
  display: grid;
  gap: 16px;
}

.tool-sidecopy {
  display: grid;
  gap: 14px;
}

.side-card {
  padding: 18px;
}

.history-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 12px;
}

.history-item {
  padding: 16px;
}

.job-status,
.status-completed,
.status-failed,
.status-processing {
  color: var(--muted);
}

.admin-section {
  padding: 18px;
  margin-bottom: 18px;
}

.admin-table-container {
  overflow-x: auto;
}

.admin-table {
  width: 100%;
  border-collapse: collapse;
}

.admin-table th,
.admin-table td {
  border-bottom: 1px solid rgba(255,255,255,0.08);
  padding: 14px 12px;
  text-align: left;
  vertical-align: top;
}

.admin-table th {
  color: var(--dim);
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.14em;
}

.admin-table tr:hover td {
  background: rgba(250,250,248,0.95);
}

.auto-payment-tab {
  margin-top: 10px;
}

.config-container {
  display: grid;
  gap: 14px;
}

.status-box,
.job-meta,
.empty-video {
  min-height: 60px;
  padding: 16px;
}

.job-meta {
  margin-top: 12px;
  white-space: pre-wrap;
}

#videoPlayer {
  width: 100%;
  display: none;
  border-radius: 22px;
  border: 1px solid var(--line);
  background: #f6f6f4;
}

.empty-video {
  margin-top: 12px;
}

.qrcode-modal {
  position: fixed;
  inset: 0;
  background: rgba(235,235,232,0.88);
  display: grid;
  place-items: center;
  padding: 18px;
  z-index: 1000;
  backdrop-filter: blur(10px);
}

.qrcode-content {
  width: min(92vw, 420px);
  padding: 24px;
  text-align: center;
}

.qrcode-img {
  max-width: 250px;
  margin: 18px auto;
}

.qrcode-img img {
  width: 100%;
  display: block;
  background: #ffffff;
  border-radius: 18px;
  padding: 12px;
}

.payment-status {
  margin-top: 18px;
  padding: 12px 14px;
  border-radius: 16px;
  border: 1px solid var(--line);
  background: rgba(255,255,255,0.94);
}

@media (max-width: 980px) {
  .app-header,
  .shell {
    max-width: 100%;
  }

  .hero-grid,
  .tool-grid {
    grid-template-columns: 1fr;
  }

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

@media (max-width: 720px) {
  body {
    padding: 10px;
  }

  .app-header {
    position: static;
    padding: 16px;
    border-radius: 22px;
    align-items: flex-start;
  }

  .header-actions {
    width: 100%;
    justify-content: flex-start;
  }

  .panel {
    padding: 18px;
    border-radius: 22px;
  }

  .panel-head,
  .actions,
  .admin-actions {
    flex-direction: column;
    align-items: stretch;
  }

  .plans-container {
    grid-template-columns: 1fr;
  }

  .auth-tabs {
    grid-template-columns: 1fr 1fr;
  }
}