:root {
  --bg: #f6f7f9;
  --surface: #ffffff;
  --border: #e2e5ea;
  --text: #1a1d23;
  --text-muted: #6b7280;
  --accent: #2563eb;
  --accent-hover: #1d4ed8;
  --disabled-bg: #eef0f3;
  --disabled-text: #b0b5bd;
  --shadow: 0 1px 3px rgba(16, 24, 40, 0.08), 0 1px 2px rgba(16, 24, 40, 0.04);
  --shadow-lg: 0 20px 40px rgba(16, 24, 40, 0.18);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

.page-header {
  max-width: 1000px;
  margin: 0 auto;
  padding: 48px 24px 24px;
  text-align: center;
}

.page-header h1 {
  margin: 0 0 8px;
  font-size: 28px;
  font-weight: 700;
}

.page-header p {
  margin: 0 0 20px;
  color: var(--text-muted);
  font-size: 15px;
}

#search {
  width: 100%;
  max-width: 360px;
  padding: 10px 14px;
  border: 1px solid var(--border);
  border-radius: 10px;
  font-size: 14px;
  background: var(--surface);
  color: var(--text);
}

#search:focus {
  outline: 2px solid var(--accent);
  outline-offset: 1px;
}

main {
  max-width: 1000px;
  margin: 0 auto;
  padding: 0 24px 64px;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 16px;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 24px 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  box-shadow: var(--shadow);
  transition: transform 0.12s ease, box-shadow 0.12s ease;
  text-align: center;
  min-height: 88px;
}

.card:hover,
.card:focus-visible {
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(16, 24, 40, 0.12);
  outline: none;
}

.card .name {
  font-size: 14px;
  font-weight: 600;
}

.empty-state {
  text-align: center;
  color: var(--text-muted);
  margin-top: 40px;
}

.overlay {
  position: fixed;
  inset: 0;
  background: rgba(16, 24, 40, 0.45);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  z-index: 10;
}

.overlay[hidden] {
  display: none;
}

.modal {
  background: var(--surface);
  border-radius: 16px;
  padding: 28px;
  width: 100%;
  max-width: 360px;
  box-shadow: var(--shadow-lg);
  position: relative;
}

.modal-close {
  position: absolute;
  top: 14px;
  right: 14px;
  border: none;
  background: transparent;
  font-size: 22px;
  line-height: 1;
  color: var(--text-muted);
  cursor: pointer;
  padding: 4px;
}

.modal-close:hover {
  color: var(--text);
}

.modal h2 {
  margin: 0 0 4px;
  font-size: 18px;
}

.modal p {
  margin: 0 0 16px;
  color: var(--text-muted);
  font-size: 14px;
}

.format-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px;
}

.format-btn {
  border: 1px solid var(--border);
  background: var(--surface);
  border-radius: 10px;
  padding: 14px 8px;
  font-size: 14px;
  font-weight: 600;
  color: var(--text);
  cursor: pointer;
  transition: background 0.12s ease, border-color 0.12s ease;
}

.format-btn:hover {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

.format-btn[disabled] {
  background: var(--disabled-bg);
  color: var(--disabled-text);
  border-color: var(--border);
  cursor: not-allowed;
}

.format-btn[disabled]:hover {
  background: var(--disabled-bg);
  color: var(--disabled-text);
  border-color: var(--border);
}

@media (max-width: 420px) {
  .page-header {
    padding: 32px 16px 16px;
  }
}