:root {
  color-scheme: light;
  font-family: "Inter", "Segoe UI", system-ui, sans-serif;
  --bg: #f5f6fb;
  --card: #ffffff;
  --text: #1b1d29;
  --muted: #5f6475;
  --accent: #4356ff;
  --accent-dark: #2f3ce8;
  --border: #e3e5ee;
  --tab-bg: #ffffff;
  --badge-bg: #e5e9ff;
  --badge-text: #2b3bff;
  --secondary-bg: #f0f2ff;
  --secondary-text: var(--accent);
  --shadow: 0 12px 30px rgba(31, 37, 89, 0.08);
  --qr-bg: #fafbff;
}

body.dark-theme {
  color-scheme: dark;
  --bg: #11131a;
  --card: #181b24;
  --text: #f3f5ff;
  --muted: #a7aec5;
  --accent: #6e7dff;
  --accent-dark: #5667ff;
  --border: #2b3140;
  --tab-bg: #1d2230;
  --badge-bg: #262d42;
  --badge-text: #c3ccff;
  --secondary-bg: #262d42;
  --secondary-text: #c3ccff;
  --shadow: none;
  --qr-bg: #202636;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
}

main {
  max-width: 1100px;
  margin: 0 auto;
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.app-header {
  padding: 28px 24px 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  max-width: 1100px;
  margin: 0 auto;
}

.app-header h1 {
  margin: 0 0 8px;
  font-size: 32px;
}

.app-header p {
  margin: 0;
  color: var(--muted);
}

.badge {
  background: var(--badge-bg);
  color: var(--badge-text);
  padding: 8px 12px;
  border-radius: 999px;
  font-weight: 600;
}

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

.theme-toggle {
  white-space: nowrap;
}

.tabs {
  display: flex;
  gap: 12px;
}

.tab-button {
  padding: 10px 18px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--tab-bg);
  color: var(--text);
  cursor: pointer;
  font-weight: 600;
}

.tab-button.active {
  background: var(--accent);
  color: #fff;
  border-color: transparent;
}

.tab-panel {
  display: none;
  gap: 24px;
  flex-direction: column;
}

.tab-panel.active {
  display: flex;
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 20px;
  box-shadow: var(--shadow);
}

.card h2,
.card h3 {
  margin-top: 0;
}

label {
  display: block;
  margin-bottom: 8px;
  font-weight: 600;
}

textarea,
input {
  width: 100%;
  border-radius: 12px;
  border: 1px solid var(--border);
  padding: 12px;
  font-size: 14px;
  font-family: inherit;
}

textarea:focus,
input:focus {
  outline: 2px solid rgba(67, 86, 255, 0.3);
  border-color: var(--accent);
}

.inline {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 12px;
}

button {
  border-radius: 10px;
  border: none;
  background: var(--accent);
  color: #fff;
  padding: 10px 16px;
  font-weight: 600;
  cursor: pointer;
}

button.secondary {
  background: var(--secondary-bg);
  color: var(--secondary-text);
}

button.primary {
  background: var(--accent-dark);
}

button:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.hint {
  color: var(--muted);
  font-size: 13px;
}

.checkbox-row {
  display: flex;
  gap: 8px;
  align-items: flex-start;
  font-size: 13px;
  margin-top: 12px;
  color: var(--muted);
}

.checkbox-row input {
  margin-top: 2px;
}

.shares-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 16px;
}

.share-card {
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 12px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.share-card textarea {
  min-height: 120px;
}

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

.qr {
  display: flex;
  justify-content: center;
  padding: 8px;
  background: var(--qr-bg);
  border-radius: 12px;
}

.recover-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.recover-item {
  display: flex;
  gap: 8px;
  align-items: flex-start;
}

.recover-item textarea {
  flex: 1;
}

.status {
  margin-top: 12px;
  font-weight: 600;
}

.status.error {
  color: #c91c1c;
}

.status.success {
  color: #137c3d;
}

footer {
  text-align: center;
  padding: 24px;
  color: var(--muted);
}

@media (max-width: 720px) {
  .app-header {
    flex-direction: column;
    align-items: flex-start;
  }

  .header-actions {
    width: 100%;
    justify-content: space-between;
  }

  .tabs {
    flex-direction: column;
  }
}