:root {
  color-scheme: light dark;
  --page-bg: linear-gradient(180deg, #f7f9ff 0%, #eef2ff 52%, #f8fbff 100%);
  --bg: #f4f7ff;
  --panel: #eef2ff;
  --card: #ffffff;
  --line: rgba(26, 36, 64, 0.18);
  --line-strong: rgba(26, 36, 64, 0.32);
  --text: #0f172a;
  --muted: #5b647a;
  --primary: #2b7dff;
  --accent: #2b7dff;
  --accent-strong: #2b7dff;
  --accent-2: #51b7ff;
  --danger: #e74c3c;
  --success: #18a058;
  --ok: #18a058;
  --bad: #e74c3c;
  --btn: #ffffff;
  --btn-border: rgba(26, 36, 64, 0.2);
  --btn-active: #e7efff;
  --shadow-soft: 0 8px 24px rgba(15, 23, 42, 0.08);
  --shadow-lift: 0 12px 30px rgba(15, 23, 42, 0.14);
  --radius: 12px;
  --radius-lg: 16px;
  --focus-ring: 0 0 0 3px rgba(43, 125, 255, 0.22);
  --highlight: linear-gradient(135deg, rgba(81, 183, 255, 0.15), rgba(43, 125, 255, 0.08));
}

@import url("https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@400;500;600;700&display=swap");

html,
body {
  background: var(--page-bg) !important;
  color: var(--text);
  font-family: "Space Grotesk", "PingFang SC", "Microsoft YaHei", sans-serif;
}

body {
  position: relative;
  overflow-x: hidden;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(rgba(43, 125, 255, 0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(43, 125, 255, 0.06) 1px, transparent 1px);
  background-size: 24px 24px;
  pointer-events: none;
  z-index: 0;
}

main,
.page {
  position: relative;
  z-index: 1;
  animation: page-fade 0.5s ease both;
}

.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-soft);
  transition: transform 0.18s ease, box-shadow 0.18s ease, border-color 0.18s ease;
}

.card:hover {
  transform: translateY(-2px);
  border-color: var(--line-strong);
  box-shadow: var(--shadow-lift);
}

.card:active {
  transform: translateY(0);
  box-shadow: var(--shadow-soft);
}

.btn,
button.btn {
  border-radius: var(--radius);
  border: 1px solid var(--btn-border);
  background: var(--btn);
  color: var(--text);
  box-shadow: var(--shadow-soft);
  transition: transform 0.12s ease, box-shadow 0.12s ease, border-color 0.12s ease;
}

.btn.primary,
button.primary {
  background: var(--primary);
  border-color: var(--primary);
  color: #fff;
}

.btn.secondary,
button.secondary {
  background: transparent;
  border-color: var(--line);
  color: var(--text);
}

.btn:active,
button:active {
  transform: scale(0.98);
  box-shadow: var(--shadow-soft);
}

.btn:hover,
button:hover {
  border-color: var(--line-strong);
  box-shadow: var(--shadow-lift);
}

input,
select,
textarea {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
  color: var(--text);
  box-shadow: inset 0 1px 0 rgba(43, 125, 255, 0.08);
  transition: border-color 0.12s ease, box-shadow 0.12s ease;
}

input:focus,
select:focus,
textarea:focus {
  outline: none;
  border-color: rgba(43, 125, 255, 0.6);
  box-shadow: var(--focus-ring);
}

a {
  color: var(--text);
}

svg {
  stroke: currentColor;
}

hr,
.divider {
  border: none;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(43, 125, 255, 0.25), transparent);
}

@keyframes page-fade {
  from {
    opacity: 0;
    transform: translateY(6px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (prefers-reduced-motion: reduce) {
  * {
    animation: none !important;
    transition: none !important;
  }
}

@media (prefers-color-scheme: dark) {
  :root {
    --page-bg: radial-gradient(circle at top, #101a32 0%, #0b1020 60%, #0a0f1d 100%);
    --bg: #0b1020;
    --panel: #101a32;
    --card: #0f1a33;
    --line: rgba(255, 255, 255, 0.12);
    --line-strong: rgba(255, 255, 255, 0.22);
    --text: #e6ecff;
    --muted: #9aa8cc;
    --btn: #0f1a33;
    --btn-border: rgba(255, 255, 255, 0.14);
    --btn-active: #132142;
    --shadow-soft: 0 8px 24px rgba(0, 0, 0, 0.25);
    --shadow-lift: 0 14px 30px rgba(0, 0, 0, 0.35);
    --focus-ring: 0 0 0 3px rgba(81, 183, 255, 0.28);
  }

  body::before {
    background-image:
      linear-gradient(rgba(81, 183, 255, 0.12) 1px, transparent 1px),
      linear-gradient(90deg, rgba(81, 183, 255, 0.12) 1px, transparent 1px);
  }

  input,
  select,
  textarea {
    background: #0c1730;
  }
}

:root[data-theme="light"] {
  --page-bg: linear-gradient(180deg, #f7f9ff 0%, #eef2ff 52%, #f8fbff 100%);
  --bg: #f4f7ff;
  --panel: #eef2ff;
  --card: #ffffff;
  --line: rgba(26, 36, 64, 0.18);
  --line-strong: rgba(26, 36, 64, 0.32);
  --text: #0f172a;
  --muted: #5b647a;
  --primary: #2b7dff;
  --accent: #2b7dff;
  --accent-strong: #2b7dff;
  --accent-2: #51b7ff;
  --danger: #e74c3c;
  --success: #18a058;
  --ok: #18a058;
  --bad: #e74c3c;
  --btn: #ffffff;
  --btn-border: rgba(26, 36, 64, 0.2);
  --btn-active: #e7efff;
  --shadow-soft: 0 8px 24px rgba(15, 23, 42, 0.08);
  --shadow-lift: 0 12px 30px rgba(15, 23, 42, 0.14);
  --radius: 12px;
  --radius-lg: 16px;
  --focus-ring: 0 0 0 3px rgba(43, 125, 255, 0.22);
  --highlight: linear-gradient(135deg, rgba(81, 183, 255, 0.15), rgba(43, 125, 255, 0.08));
}

:root[data-theme="dark"] {
  --page-bg: radial-gradient(circle at top, #101a32 0%, #0b1020 60%, #0a0f1d 100%);
  --bg: #0b1020;
  --panel: #101a32;
  --card: #0f1a33;
  --line: rgba(255, 255, 255, 0.12);
  --line-strong: rgba(255, 255, 255, 0.22);
  --text: #e6ecff;
  --muted: #9aa8cc;
  --btn: #0f1a33;
  --btn-border: rgba(255, 255, 255, 0.14);
  --btn-active: #132142;
  --shadow-soft: 0 8px 24px rgba(0, 0, 0, 0.25);
  --shadow-lift: 0 14px 30px rgba(0, 0, 0, 0.35);
  --focus-ring: 0 0 0 3px rgba(81, 183, 255, 0.28);
}

:root[data-theme="dark"],
:root[data-theme="dark"] body {
  background: radial-gradient(circle at top, #101a32 0%, #0b1020 60%, #0a0f1d 100%) !important;
}

:root[data-theme="dark"] body::before {
  background-image:
    linear-gradient(rgba(81, 183, 255, 0.12) 1px, transparent 1px),
    linear-gradient(90deg, rgba(81, 183, 255, 0.12) 1px, transparent 1px);
}

:root[data-theme="dark"] input,
:root[data-theme="dark"] select,
:root[data-theme="dark"] textarea {
  background: #0c1730;
}