:root {
  --md-primary: #6750A4;
  --md-on-primary: #ffffff;
  --md-primary-container: #EADDFF;
  --md-on-primary-container: #21005D;
  --md-secondary: #625B71;
  --md-surface: #FFFBFE;
  --md-surface-container: #F3EDF7;
  --md-surface-container-high: #ECE6F0;
  --md-on-surface: #1D1B20;
  --md-on-surface-variant: #49454F;
  --md-outline: #79747E;
  --md-error: #B3261E;
  --md-success: #146C2E;
  --app-bg: linear-gradient(135deg, #f8f5ff 0%, #f4f8ff 48%, #fffaf2 100%);
}

.dark {
  --md-primary: #D0BCFF;
  --md-on-primary: #381E72;
  --md-primary-container: #4F378B;
  --md-on-primary-container: #EADDFF;
  --md-secondary: #CCC2DC;
  --md-surface: #141218;
  --md-surface-container: #211F26;
  --md-surface-container-high: #2B2930;
  --md-on-surface: #E6E0E9;
  --md-on-surface-variant: #CAC4D0;
  --md-outline: #938F99;
  --md-error: #F2B8B5;
  --md-success: #9BE8AD;
  --app-bg: radial-gradient(circle at top left, #27203a 0%, #141218 48%, #101820 100%);
}

* { box-sizing: border-box; }
body {
  min-height: 100vh;
  font-family: 'Roboto', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: var(--app-bg);
  color: var(--md-on-surface);
}

.m3-card {
  background: color-mix(in srgb, var(--md-surface) 86%, transparent);
  border: 1px solid color-mix(in srgb, var(--md-outline) 18%, transparent);
  border-radius: 24px;
  box-shadow: 0 8px 28px rgba(36, 25, 66, 0.08);
  backdrop-filter: blur(18px);
}
.dark .m3-card { box-shadow: 0 18px 36px rgba(0,0,0,.22); }

.m3-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .5rem;
  min-height: 40px;
  border-radius: 999px;
  padding: 0 1.25rem;
  font-weight: 600;
  line-height: 1;
  transition: transform .16s ease, box-shadow .16s ease, background .16s ease, border .16s ease;
  user-select: none;
  white-space: nowrap;
}
.m3-button:active { transform: scale(.98); }
.m3-button[disabled] { opacity: .45; pointer-events: none; }
.m3-filled {
  color: var(--md-on-primary);
  background: var(--md-primary);
  box-shadow: 0 4px 12px rgba(103, 80, 164, .24);
}
.m3-filled:hover { box-shadow: 0 7px 18px rgba(103, 80, 164, .28); }
.m3-outlined {
  color: var(--md-primary);
  border: 1px solid color-mix(in srgb, var(--md-outline) 70%, transparent);
  background: transparent;
}
.m3-outlined:hover { background: color-mix(in srgb, var(--md-primary) 8%, transparent); }
.m3-text-button {
  color: var(--md-primary);
  background: transparent;
}
.m3-text-button:hover { background: color-mix(in srgb, var(--md-primary) 8%, transparent); }

.m3-input {
  width: 100%;
  min-height: 56px;
  border-radius: 16px;
  border: 1px solid color-mix(in srgb, var(--md-outline) 48%, transparent);
  background: color-mix(in srgb, var(--md-surface-container) 72%, transparent);
  padding: .95rem 1rem .65rem;
  color: var(--md-on-surface);
  outline: none;
  transition: border .16s ease, box-shadow .16s ease, background .16s ease;
}
.m3-input:focus {
  border-color: var(--md-primary);
  box-shadow: 0 0 0 4px color-mix(in srgb, var(--md-primary) 14%, transparent);
}
.m3-label { color: var(--md-on-surface-variant); font-size: .78rem; font-weight: 600; }
.m3-select { appearance: none; }

.nav-item {
  display: flex;
  align-items: center;
  gap: .8rem;
  width: 100%;
  min-height: 48px;
  padding: .75rem 1rem;
  border-radius: 999px;
  color: var(--md-on-surface-variant);
  font-weight: 600;
  transition: background .18s ease, color .18s ease, transform .18s ease;
}
.nav-item:hover { background: color-mix(in srgb, var(--md-primary) 8%, transparent); color: var(--md-on-surface); }
.nav-item.active { color: var(--md-on-primary-container); background: var(--md-primary-container); }
.dark .nav-item.active { color: var(--md-on-primary-container); }

.chip {
  display: inline-flex;
  align-items: center;
  gap: .35rem;
  border-radius: 999px;
  padding: .35rem .72rem;
  font-size: .8rem;
  font-weight: 600;
  border: 1px solid color-mix(in srgb, var(--md-outline) 35%, transparent);
  color: var(--md-on-surface-variant);
  background: color-mix(in srgb, var(--md-surface-container) 86%, transparent);
}
.chip.active { background: var(--md-primary-container); color: var(--md-on-primary-container); border-color: transparent; }
.chip.error { background: color-mix(in srgb, var(--md-error) 12%, transparent); color: var(--md-error); border-color: transparent; }
.chip.success { background: color-mix(in srgb, var(--md-success) 12%, transparent); color: var(--md-success); border-color: transparent; }

.table-wrap { overflow:auto; border-radius: 20px; border: 1px solid color-mix(in srgb, var(--md-outline) 16%, transparent); }
table { width:100%; border-collapse: collapse; min-width: 860px; }
th, td { padding: 14px 16px; text-align:left; border-bottom: 1px solid color-mix(in srgb, var(--md-outline) 13%, transparent); }
th { font-size: .78rem; color: var(--md-on-surface-variant); font-weight: 700; background: color-mix(in srgb, var(--md-surface-container) 70%, transparent); }
tr:hover td { background: color-mix(in srgb, var(--md-primary) 5%, transparent); }

.fab {
  position: fixed;
  right: 24px;
  bottom: 24px;
  width: 64px;
  height: 64px;
  border-radius: 20px;
  color: var(--md-on-primary-container);
  background: var(--md-primary-container);
  box-shadow: 0 12px 24px rgba(44, 36, 68, .22);
  display:flex; align-items:center; justify-content:center;
  transition: transform .18s ease;
  z-index: 50;
}
.fab:hover { transform: translateY(-2px); }

.toast {
  position: fixed;
  left: 50%;
  bottom: 28px;
  transform: translateX(-50%) translateY(30px);
  opacity: 0;
  pointer-events: none;
  border-radius: 18px;
  padding: 14px 18px;
  color: var(--md-on-surface);
  background: var(--md-surface-container-high);
  box-shadow: 0 14px 34px rgba(0,0,0,.22);
  z-index: 100;
  transition: opacity .22s ease, transform .22s ease;
  max-width: min(92vw, 520px);
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

.dialog-backdrop {
  position: fixed; inset: 0;
  background: rgba(0,0,0,.38);
  display: none;
  align-items: center;
  justify-content: center;
  padding: 18px;
  z-index: 90;
}
.dialog-backdrop.open { display:flex; }
.dialog {
  width: min(720px, 96vw);
  max-height: 90vh;
  overflow:auto;
  border-radius: 28px;
  background: var(--md-surface);
  box-shadow: 0 24px 60px rgba(0,0,0,.28);
  animation: dialogIn .18s ease;
}
@keyframes dialogIn { from { transform: scale(.96) translateY(12px); opacity:.7; } to { transform: scale(1) translateY(0); opacity:1; } }

.material-symbols-rounded { font-variation-settings: 'FILL' 0, 'wght' 500, 'GRAD' 0, 'opsz' 24; }
.skeleton { background: linear-gradient(90deg, transparent, color-mix(in srgb, var(--md-outline) 11%, transparent), transparent); background-size: 200% 100%; animation: shimmer 1.2s infinite; }
@keyframes shimmer { 0% { background-position: 200% 0; } 100% { background-position: -200% 0; } }

@media (max-width: 900px) {
  #sidebar { display:none; }
  #main { margin-left:0; padding-bottom: 92px; }
  #bottomNav { display:flex; }
  .fab { bottom: 92px; }
}
@media (min-width: 901px) {
  #bottomNav { display:none; }
}

.front-gradient-card {
  position: relative;
  overflow: hidden;
}
.front-gradient-card::before {
  content: '';
  position: absolute;
  inset: -40% -25% auto auto;
  width: 340px;
  height: 340px;
  border-radius: 999px;
  background: color-mix(in srgb, var(--md-primary) 16%, transparent);
  filter: blur(4px);
  pointer-events: none;
}
.feature-tile {
  min-height: 156px;
  transition: transform .18s ease, box-shadow .18s ease, border .18s ease;
}
.feature-tile:hover {
  transform: translateY(-3px);
  box-shadow: 0 18px 38px rgba(36, 25, 66, .12);
  border-color: color-mix(in srgb, var(--md-primary) 36%, transparent);
}
.step-dot {
  width: 36px;
  height: 36px;
  border-radius: 14px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: 900;
  color: var(--md-on-primary);
  background: var(--md-primary);
}
.copyable {
  cursor: pointer;
}
.copyable:hover {
  background: color-mix(in srgb, var(--md-primary) 9%, transparent);
}
.user-tabs {
  display: flex;
  gap: .5rem;
  flex-wrap: wrap;
}
.user-tab.active {
  color: var(--md-on-primary-container);
  background: var(--md-primary-container);
  border-color: transparent;
}
.upload-drop {
  border: 1.5px dashed color-mix(in srgb, var(--md-primary) 42%, transparent);
  background: color-mix(in srgb, var(--md-primary) 6%, transparent);
}
@media (max-width: 640px) {
  .m3-button { padding-left: .95rem; padding-right: .95rem; }
  table { min-width: 720px; }
}

.checkout-payment-option {
  border-color: color-mix(in srgb, var(--md-outline) 22%, transparent);
  background: color-mix(in srgb, var(--md-surface-container) 58%, transparent);
  min-height: 92px;
}
.checkout-payment-option:hover {
  border-color: color-mix(in srgb, var(--md-primary) 38%, transparent);
  background: color-mix(in srgb, var(--md-primary) 6%, transparent);
  transform: translateY(-1px);
}
.checkout-payment-option.selected {
  border-color: var(--md-primary);
  background: color-mix(in srgb, var(--md-primary) 12%, transparent);
  box-shadow: 0 10px 24px color-mix(in srgb, var(--md-primary) 14%, transparent);
}
.checkout-payment-option.selected .payment-check {
  color: var(--md-primary);
}
.checkout-pay-type.active {
  background: var(--md-primary-container);
  color: var(--md-on-primary-container);
  border-color: transparent;
}