:root {
  color-scheme: dark;
  --bg: #080d18;
  --panel: #0c1322;
  --line: #2a3a54;
  --line-soft: #1f2a3c;
  --text: #e5e7eb;
  --muted: #94a3b8;
  --accent: #7de3ff;
  --accent-strong: #2c6bff;
  --glow: 0 18px 48px rgba(0, 0, 0, 0.24);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-width: 320px;
  background:
    radial-gradient(circle at 18% 0%, rgba(125, 227, 255, 0.12), transparent 30%),
    radial-gradient(circle at 90% 8%, rgba(134, 239, 172, 0.08), transparent 26%),
    linear-gradient(90deg, rgba(255, 255, 255, 0.026) 1px, transparent 1px),
    linear-gradient(0deg, rgba(255, 255, 255, 0.02) 1px, transparent 1px),
    var(--bg);
  background-size: auto, auto, 58px 58px, 58px 58px, auto;
  color: var(--text);
  font-family: "Noto Sans KR", "Segoe UI", "Malgun Gothic", Arial, sans-serif;
  font-size: 14px;
}

a {
  color: inherit;
  text-decoration: none;
}

.download-page {
  display: grid;
  min-height: 100vh;
  place-items: center;
  padding: 24px;
}

.download-box {
  width: min(520px, 100%);
  border: 1px solid var(--line);
  border-radius: 10px;
  background: rgba(12, 19, 34, 0.92);
  box-shadow: var(--glow);
  padding: 18px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
}

.brand-mark {
  display: grid;
  width: 36px;
  height: 36px;
  place-items: center;
  border-radius: 8px;
  background: linear-gradient(135deg, var(--accent), var(--accent-strong) 58%, #1d2f88);
  color: #07111f;
  font-weight: 900;
  box-shadow: 0 0 28px rgba(125, 227, 255, 0.18);
}

.brand strong,
.brand small {
  display: block;
}

.brand small {
  margin-top: 2px;
  color: var(--muted);
  font-size: 12px;
}

.download-list {
  display: grid;
  gap: 8px;
}

.download-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  border: 1px solid var(--line-soft);
  border-radius: 8px;
  background: rgba(8, 13, 24, 0.64);
  padding: 12px;
}

.download-item strong,
.download-item span,
.download-item small {
  display: block;
}

.download-item span {
  margin-top: 3px;
  color: var(--text);
  font-size: 13px;
  word-break: break-all;
}

.download-item small {
  margin-top: 4px;
  color: var(--muted);
  font-size: 11px;
}

.download-button {
  flex: 0 0 auto;
  border: 1px solid rgba(125, 227, 255, 0.55);
  border-radius: 7px;
  background: rgba(125, 227, 255, 0.12);
  color: var(--accent);
  font-weight: 900;
  padding: 9px 12px;
}

.empty {
  border: 1px dashed var(--line);
  border-radius: 8px;
  color: var(--muted);
  padding: 24px;
  text-align: center;
}

.empty.small {
  padding: 12px;
  font-size: 12px;
}

.meter-data-space {
  display: none !important;
}

.admin-open {
  position: fixed;
  right: 16px;
  bottom: 16px;
  border: 1px solid rgba(125, 227, 255, 0.3);
  border-radius: 7px;
  background: rgba(8, 13, 24, 0.72);
  color: var(--muted);
  font: inherit;
  font-size: 12px;
  font-weight: 800;
  padding: 8px 10px;
}

.admin-panel {
  position: fixed;
  inset: 0;
  display: grid;
  place-items: center;
  background: rgba(2, 6, 14, 0.72);
  padding: 20px;
}

.admin-panel[hidden] {
  display: none !important;
}

.admin-card {
  width: min(420px, 100%);
  max-height: calc(100vh - 40px);
  overflow: auto;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: rgba(12, 19, 34, 0.98);
  box-shadow: var(--glow);
  padding: 16px;
}

.admin-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 14px;
}

.admin-head button,
.upload-form button {
  border: 1px solid rgba(125, 227, 255, 0.48);
  border-radius: 7px;
  background: rgba(125, 227, 255, 0.12);
  color: var(--accent);
  font: inherit;
  font-weight: 900;
  padding: 8px 10px;
}

.upload-form {
  display: grid;
  gap: 10px;
}

.upload-form label {
  display: grid;
  gap: 6px;
  color: var(--muted);
  font-size: 12px;
  font-weight: 800;
}

.upload-form input {
  min-height: 38px;
  border: 1px solid var(--line);
  border-radius: 7px;
  background: rgba(8, 13, 24, 0.78);
  color: var(--text);
  padding: 8px 10px;
}

.admin-message {
  min-height: 18px;
  margin: 0;
  color: var(--muted);
  font-size: 12px;
}

.admin-message[data-type="error"] {
  color: #fca5a5;
}

.admin-message[data-type="success"] {
  color: #86efac;
}

.admin-list {
  display: grid;
  gap: 8px;
  margin-top: 12px;
}

.admin-release-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  border: 1px solid var(--line-soft);
  border-radius: 8px;
  background: rgba(8, 13, 24, 0.56);
  padding: 10px;
}

.admin-release-item strong,
.admin-release-item span,
.admin-release-item small {
  display: block;
}

.admin-release-item span {
  margin-top: 3px;
  word-break: break-all;
  font-size: 12px;
}

.admin-release-item small {
  margin-top: 3px;
  color: var(--muted);
  font-size: 11px;
}

@media (max-width: 520px) {
  .download-item {
    align-items: stretch;
    flex-direction: column;
  }

  .download-button {
    text-align: center;
  }
}