:root {
  --bg: #f4f7fb;
  --card: #ffffff;
  --text: #172033;
  --muted: #667085;
  --primary: #1769aa;
  --primary-dark: #0e4f84;
  --line: #d8e0ea;
  --success: #117a4c;
  --danger: #b42318;
  --shadow: 0 18px 45px rgba(15, 35, 65, 0.12);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--text);
  background: radial-gradient(circle at top left, #e9f5ff 0, var(--bg) 42%, #eef2f7 100%);
  font-family: "Yu Gothic", "Meiryo", system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
}

button,
input,
select {
  font: inherit;
}

.site-header {
  padding: 56px 24px 28px;
  background: linear-gradient(135deg, #0f3f6b, #1779bd);
  color: #fff;
}

.site-header > div,
.page {
  width: min(980px, calc(100% - 32px));
  margin: 0 auto;
}

.site-header h1 {
  margin: 8px 0 12px;
  font-size: clamp(28px, 4vw, 44px);
  letter-spacing: 0.04em;
}

.lead {
  max-width: 720px;
  margin: 0;
  color: rgba(255, 255, 255, 0.86);
  line-height: 1.8;
}

.page {
  padding: 28px 0 56px;
}

.card {
  margin-bottom: 24px;
  padding: 28px;
  background: var(--card);
  border: 1px solid rgba(216, 224, 234, 0.72);
  border-radius: 20px;
  box-shadow: var(--shadow);
}

.section-title {
  margin-bottom: 20px;
}

.section-title h2,
.files-head h3 {
  margin: 0;
}

.eyebrow {
  margin: 0;
  color: #89c9ff;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.card .eyebrow {
  color: var(--primary);
}

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

label {
  display: grid;
  gap: 8px;
  color: var(--muted);
  font-weight: 700;
}

input,
select {
  width: 100%;
  padding: 13px 14px;
  color: var(--text);
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 12px;
}

input:focus,
select:focus {
  outline: 3px solid rgba(23, 105, 170, 0.18);
  border-color: var(--primary);
}

button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 18px;
  color: #fff;
  background: var(--primary);
  border: 0;
  border-radius: 999px;
  cursor: pointer;
  font-weight: 700;
  transition: transform 0.12s ease, background 0.12s ease, opacity 0.12s ease;
}

button:hover {
  background: var(--primary-dark);
  transform: translateY(-1px);
}

button:disabled {
  opacity: 0.52;
  cursor: wait;
  transform: none;
}

button.secondary {
  color: var(--primary);
  background: #e9f4ff;
}

button.secondary:hover {
  background: #d7ecff;
}

button.small {
  min-height: 36px;
  padding: 0 14px;
  font-size: 14px;
}

.button-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.account-box {
  display: grid;
  grid-template-columns: 1.2fr 1fr 0.8fr auto;
  gap: 16px;
  align-items: center;
  padding: 18px;
  background: #f7fbff;
  border: 1px solid #d9ecff;
  border-radius: 16px;
}

.label {
  margin: 0 0 4px;
  color: var(--muted);
  font-size: 13px;
}

.value {
  margin: 0;
  font-weight: 700;
}

.uid {
  font-family: Consolas, "Courier New", monospace;
  font-size: 13px;
  overflow-wrap: anywhere;
}

.account-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  justify-content: flex-end;
}

hr {
  margin: 24px 0;
  border: 0;
  border-top: 1px solid var(--line);
}

.files-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-top: 28px;
  margin-bottom: 12px;
}

.file-list {
  display: grid;
  gap: 10px;
}

.file-list.empty {
  padding: 18px;
  color: var(--muted);
  background: #f8fafc;
  border: 1px dashed var(--line);
  border-radius: 14px;
}

.file-item {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 12px;
  align-items: center;
  padding: 14px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 14px;
}

.file-name {
  margin: 0 0 4px;
  font-weight: 700;
  overflow-wrap: anywhere;
}

.file-meta {
  margin: 0;
  color: var(--muted);
  font-size: 13px;
}

.file-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.status {
  min-height: 24px;
  color: var(--muted);
}

.status.ok {
  color: var(--success);
}

.status.error {
  color: var(--danger);
}

.hidden {
  display: none;
}

@media (max-width: 720px) {
  .site-header {
    padding-top: 36px;
  }

  .card {
    padding: 22px;
  }

  .account-box,
  .file-item {
    grid-template-columns: 1fr;
  }
}