*{margin:0;padding:0;box-sizing:border-box}:root{--bg: #0f1117;--bg-card: #1a1d27;--bg-card-elevated: #242836;--accent: #6c5ce7;--accent-light: #a29bfe;--green: #00cec9;--red: #ff7675;--yellow: #fdcb6e;--text: #f0f0f5;--text-secondary: #b6bbcf;--text-muted: #9298ae;--border: rgba(255, 255, 255, .06);--radius: 16px;--radius-sm: 10px}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;background:var(--bg);color:var(--text);min-height:100dvh;-webkit-font-smoothing:antialiased}button{font:inherit;cursor:pointer;border:none;border-radius:var(--radius-sm);padding:12px 20px;min-height:44px;min-width:44px;font-weight:600;transition:transform .1s,opacity .15s}button:active{transform:scale(.97)}button:disabled{opacity:.4;cursor:not-allowed;transform:none}input,textarea{font:inherit;background:var(--bg-card-elevated);border:2px solid var(--border);border-radius:var(--radius-sm);padding:14px 16px;width:100%;min-height:48px;color:var(--text)}textarea{resize:vertical}input::placeholder,textarea::placeholder{color:var(--text-muted)}input:focus,textarea:focus{outline:none;border-color:var(--accent)}.container{max-width:440px;margin:0 auto;padding:20px 16px 88px}.card{background:var(--bg-card);border-radius:var(--radius);padding:20px;border:1px solid var(--border)}.btn-primary{background:var(--accent);color:#fff;width:100%;border-radius:var(--radius-sm);font-size:15px;letter-spacing:.01em}.btn-secondary{background:var(--bg-card-elevated);color:var(--text);border:1px solid var(--border);padding:10px 14px;font-size:13px}.btn-hard{background:#ff767526;color:var(--red);flex:1}.btn-medium{background:#fdcb6e26;color:var(--yellow);flex:1}.btn-easy{background:#00cec926;color:var(--green);flex:1}.rating-buttons{display:flex;gap:8px;margin-top:16px}.skeleton{background:linear-gradient(90deg,var(--bg-card) 25%,var(--bg-card-elevated) 50%,var(--bg-card) 75%);background-size:200% 100%;animation:shimmer 1.5s infinite;border-radius:var(--radius);height:20px}@keyframes shimmer{0%{background-position:200% 0}to{background-position:-200% 0}}.navbar{position:fixed;bottom:0;left:0;right:0;background:var(--bg-card);border-top:1px solid var(--border);display:flex;justify-content:center;gap:40px;padding:8px 0;padding-bottom:max(8px,env(safe-area-inset-bottom));z-index:10;-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px)}.navbar a{display:flex;flex-direction:column;align-items:center;gap:3px;text-decoration:none;color:var(--text-secondary);font-size:11px;font-weight:600;min-width:44px;min-height:44px;justify-content:center;transition:color .15s}.navbar a.active{color:var(--accent-light)}.stat-row{display:flex;justify-content:space-between;padding:10px 0;border-bottom:1px solid var(--border);font-size:14px}.stat-row:last-child{border-bottom:none}.error-box{background:#ff76751a;color:var(--red);padding:12px;border-radius:var(--radius-sm);text-align:center}.badge{background:var(--bg-card-elevated);padding:4px 12px;border-radius:20px;font-size:12px;color:var(--text-secondary);font-weight:500}.phrase-card{background:var(--accent);border-radius:var(--radius);padding:32px 24px;min-height:240px;display:flex;flex-direction:column;align-items:center;justify-content:center;position:relative}.progress-bar-track{width:100%;height:4px;background:var(--bg-card-elevated);border-radius:2px;overflow:hidden}.progress-bar-fill{height:100%;background:var(--accent);border-radius:2px;transition:width .3s ease}.stat-counter{display:flex;flex-direction:column;align-items:center;gap:4px}.stat-counter .label{font-size:12px;color:var(--text-muted);font-weight:500}.stat-counter .value{font-size:28px;font-weight:700;color:var(--text)}.phrase-list-item{display:flex;align-items:center;justify-content:space-between;padding:14px 0;border-bottom:1px solid var(--border);cursor:pointer;transition:opacity .15s}.phrase-list-item:last-child{border-bottom:none}.phrase-list-item:active{opacity:.7}.topic-chip{background:var(--bg-card-elevated);color:var(--text-secondary);padding:8px 14px;border-radius:20px;font-size:13px;font-weight:500;white-space:nowrap;flex-shrink:0}.topic-chip-active{background:var(--accent);color:#fff}.assistant-card{display:flex;flex-direction:column;gap:16px}.assistant-header{display:flex;align-items:flex-start;justify-content:space-between;gap:12px}.assistant-header h2{font-size:16px;font-weight:700}.assistant-header p{margin-top:4px;font-size:13px;color:var(--text-secondary);line-height:1.5}.assistant-model{flex-shrink:0;font-size:11px;color:var(--accent-light);background:#6c5ce71f;border:1px solid rgba(162,155,254,.2);border-radius:999px;padding:6px 10px}.assistant-empty p{font-size:12px;color:var(--text-muted);margin-bottom:10px;text-transform:uppercase;letter-spacing:.06em}.assistant-suggestions{display:flex;flex-wrap:wrap;gap:8px}.assistant-suggestion{background:var(--bg-card-elevated);color:var(--text-secondary);border:1px solid var(--border);border-radius:999px;padding:8px 12px;min-height:auto;font-size:12px;font-weight:500}.assistant-messages{display:flex;flex-direction:column;gap:10px}.assistant-message{border-radius:14px;padding:14px;line-height:1.55}.assistant-message-user{background:#6c5ce724;border:1px solid rgba(162,155,254,.18)}.assistant-message-assistant{background:var(--bg-card-elevated);border:1px solid var(--border)}.assistant-message-role{display:block;font-size:11px;color:var(--text-muted);text-transform:uppercase;letter-spacing:.06em;margin-bottom:8px}.assistant-message p{white-space:pre-wrap}.assistant-form{display:flex;flex-direction:column;gap:10px}.assistant-error{text-align:left}