:root {
  --cf-orange: #f6821f;
  --cf-blue: #1d3557;
  --bg: #f8f9fa;
  --card-bg: #ffffff;
  --text: #212529;
  --text-muted: #6c757d;
  --border: #dee2e6;
  --danger: #dc3545;
  --radius: 8px;
  --shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
}

.container {
  max-width: 680px;
  margin: 0 auto;
  padding: 32px 16px;
}

/* Header */
header {
  text-align: center;
  margin-bottom: 32px;
}

header h1 {
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--cf-blue);
}

header h1::before {
  content: "☁️ ";
}

.subtitle {
  margin-top: 6px;
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* Input section */
.input-section {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
  box-shadow: var(--shadow);
  margin-bottom: 24px;
}

textarea {
  width: 100%;
  resize: vertical;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 10px 12px;
  font-size: 0.95rem;
  font-family: inherit;
  color: var(--text);
  transition: border-color 0.2s;
}

textarea:focus {
  outline: none;
  border-color: var(--cf-orange);
}

.input-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 10px;
}

#char-count {
  font-size: 0.8rem;
  color: var(--text-muted);
}

button#add-btn {
  background: var(--cf-orange);
  color: #fff;
  border: none;
  border-radius: var(--radius);
  padding: 8px 20px;
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: opacity 0.2s;
}

button#add-btn:hover {
  opacity: 0.88;
}

button#add-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* Memo list */
.memo-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px 16px;
  margin-bottom: 12px;
  box-shadow: var(--shadow);
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 12px;
  animation: fadeIn 0.2s ease;
}

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

.memo-content {
  flex: 1;
  font-size: 0.95rem;
  line-height: 1.6;
  white-space: pre-wrap;
  word-break: break-word;
}

.memo-meta {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-top: 6px;
}

.delete-btn {
  background: none;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text-muted);
  padding: 4px 10px;
  font-size: 0.8rem;
  cursor: pointer;
  white-space: nowrap;
  transition: border-color 0.2s, color 0.2s;
  flex-shrink: 0;
}

.delete-btn:hover {
  border-color: var(--danger);
  color: var(--danger);
}

.loading,
.empty {
  text-align: center;
  padding: 40px;
  color: var(--text-muted);
  font-size: 0.9rem;
}

/* Tech badges */
footer {
  margin-top: 40px;
  text-align: center;
}

.tech-badges {
  display: flex;
  justify-content: center;
  gap: 8px;
  flex-wrap: wrap;
}

.badge {
  font-size: 0.75rem;
  font-weight: 600;
  padding: 4px 10px;
  border-radius: 20px;
  color: #fff;
}

.badge.pages     { background: #f6821f; }
.badge.functions { background: #1d3557; }
.badge.d1        { background: #457b9d; }

/* Toast */
.toast {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%) translateY(80px);
  background: #333;
  color: #fff;
  padding: 10px 20px;
  border-radius: 24px;
  font-size: 0.875rem;
  opacity: 0;
  transition: transform 0.3s, opacity 0.3s;
  pointer-events: none;
  z-index: 100;
}

.toast.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}