:root { --accent: #000; --sub: #666; --bg: #ffffff; --surface: #f5f5f7; }
body { background: var(--bg); color: #000; font-family: -apple-system, sans-serif; margin: 0; display: flex; justify-content: center; align-items: center; height: 100vh; -webkit-font-smoothing: antialiased; overflow: hidden; }
.app { width: 100%; max-width: 360px; padding: 20px; }
.nav { display: flex; gap: 24px; margin-bottom: 30px; }
.nav-item { font-size: 15px; font-weight: 600; cursor: pointer; color: #ccc; transition: 0.2s; position: relative; padding: 8px 0; }
.nav-item.active { color: #000; }
.nav-item.active::after { content: ''; position: absolute; bottom: 0; left: 0; width: 100%; height: 2px; background: #000; }
.panel { display: none; animation: slide 0.3s ease-out; }
.panel.active { display: block; }
@keyframes slide { from { opacity: 0; transform: translateY(5px); } to { opacity: 1; transform: translateY(0); } }
.drop-area { border: 1px solid #e5e5e5; border-radius: 16px; padding: 50px 20px; text-align: center; cursor: pointer; background: var(--surface); transition: 0.2s; }
.drop-area:hover { border-color: #000; }
input[type="text"] { width: 100%; border: 1px solid #e5e5e5; padding: 16px; border-radius: 12px; font-size: 14px; box-sizing: border-box; outline: none; background: var(--surface); margin-bottom: 12px; }
.btn-main { background: #000; color: #fff; border: none; padding: 16px; border-radius: 12px; font-size: 14px; font-weight: 600; width: 100%; cursor: pointer; }
.token-result { margin-top: 20px; padding: 16px; border-radius: 16px; background: #fafafa; border: 1px solid #eee; display: none; }
.token-display-box { font-family: monospace; font-size: 11px; color: #333; background: #fff; padding: 10px; border-radius: 8px; border: 1px solid #eee; margin-bottom: 12px; word-break: break-all; user-select: none; pointer-events: none; }
#toast { position: fixed; bottom: 40px; left: 50%; transform: translateX(-50%); background: rgba(0,0,0,0.85); color: white; padding: 10px 24px; border-radius: 100px; font-size: 12px; opacity: 0; transition: 0.3s; pointer-events: none; z-index: 1000; backdrop-filter: blur(4px); }
#toast.show { opacity: 1; bottom: 60px; }