.app{min-height:100vh;display:flex;flex-direction:column}.app.loading{align-items:center;justify-content:center}.loading-spinner{width:40px;height:40px;border:3px solid var(--border);border-top-color:var(--accent);border-radius:50%;animation:spin .8s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.page-header{display:flex;align-items:center;justify-content:space-between;padding:16px 20px;background:var(--bg-secondary);border-bottom:1px solid var(--border)}.page-header h1{font-size:1.2rem;font-weight:600;letter-spacing:.5px}.page-header .hat-badge{display:flex;align-items:center;gap:8px;background:#e9456026;border:1px solid rgba(233,69,96,.3);padding:6px 12px;border-radius:8px;font-size:.85rem;font-family:Courier New,monospace;color:var(--accent);font-weight:600}.page-header .hat-badge .expiry{font-size:.7rem;color:var(--text-secondary);font-family:inherit}.btn{padding:12px 24px;border-radius:10px;font-size:.95rem;font-weight:600;transition:all .2s ease;letter-spacing:.3px}.btn-primary{background:var(--accent);color:#fff}.btn-primary:hover{background:var(--accent-hover);transform:translateY(-1px);box-shadow:0 4px 15px #e9456066}.btn-primary:disabled{opacity:.5;cursor:not-allowed;transform:none;box-shadow:none}.btn-secondary{background:#ffffff14;color:var(--text-primary);border:1px solid var(--border)}.btn-secondary:hover{background:#ffffff24}.btn-danger{background:#ff475726;color:var(--error);border:1px solid rgba(255,71,87,.3)}.btn-danger:hover{background:#ff475740}.btn-small{padding:8px 16px;font-size:.8rem}.input-field{width:100%;padding:14px 16px;background:#ffffff0f;border:1px solid var(--border);border-radius:10px;color:var(--text-primary);font-size:1rem;transition:border-color .2s ease}.input-field:focus{border-color:var(--accent);background:#ffffff17}.input-field::placeholder{color:var(--text-secondary)}.input-mono{font-family:Courier New,monospace;font-size:1.15rem;letter-spacing:2px;text-transform:uppercase;text-align:center}.card{background:var(--bg-card);border:1px solid var(--border);border-radius:14px;padding:20px}.card-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:16px}.card-header h2{font-size:1rem;font-weight:600;color:var(--text-secondary);text-transform:uppercase;letter-spacing:1px}.status{display:inline-block;padding:4px 10px;border-radius:6px;font-size:.75rem;font-weight:600;text-transform:uppercase;letter-spacing:.5px}.status-active{background:#00d26a26;color:var(--success)}.status-expired{background:#ffc10726;color:var(--warning)}.status-consumed{background:#a0a0a026;color:var(--text-secondary)}.status-burned{background:#ff475726;color:var(--error)}.message-banner{padding:12px 16px;border-radius:10px;font-size:.9rem;font-weight:500;text-align:center}.message-error{background:#ff47571f;color:var(--error);border:1px solid rgba(255,71,87,.25)}.message-success{background:#00d26a1f;color:var(--success);border:1px solid rgba(0,210,106,.25)}.home-page{flex:1;display:flex;flex-direction:column;padding:20px;max-width:480px;margin:0 auto;width:100%}.home-hero{text-align:center;padding:48px 0 32px}.home-hero .logo{font-size:3rem;margin-bottom:12px}.home-hero h1{font-size:1.8rem;font-weight:700;margin-bottom:8px;letter-spacing:1px}.home-hero p{color:var(--text-secondary);font-size:.95rem}.hat-input-group{display:flex;flex-direction:column;gap:12px;margin-bottom:24px}.hat-input-group .input-row{display:flex;gap:10px}.hat-input-group .input-row .input-field{flex:1}.home-session{flex:1;display:flex;flex-direction:column;gap:16px}.session-active-card{background:linear-gradient(135deg,#e945601a,#0f346099);border:1px solid rgba(233,69,96,.25);border-radius:14px;padding:20px;text-align:center}.session-active-card .hat-code-display{font-family:Courier New,monospace;font-size:1.8rem;font-weight:700;color:var(--accent);letter-spacing:3px;margin:8px 0}.session-active-card .expiry-info{font-size:.85rem;color:var(--text-secondary)}.pair-form{display:flex;gap:10px;margin-top:8px}.pair-form .input-field{flex:1}.pairs-list{display:flex;flex-direction:column;gap:10px}.pair-item{display:flex;align-items:center;justify-content:space-between;padding:14px 16px;background:#ffffff0a;border:1px solid var(--border);border-radius:10px;cursor:pointer;transition:all .2s ease;text-decoration:none;color:var(--text-primary)}.pair-item:hover{background:#ffffff14;border-color:var(--accent);text-decoration:none}.pair-item .pair-codes{display:flex;align-items:center;gap:8px;font-family:Courier New,monospace;font-size:.85rem}.pair-item .pair-arrow{color:var(--accent);font-size:1.1rem}.home-footer{padding:20px 0;text-align:center}.chat-page{flex:1;display:flex;flex-direction:column;height:100vh}.chat-header{display:flex;align-items:center;gap:12px;padding:14px 20px;background:var(--bg-secondary);border-bottom:1px solid var(--border)}.chat-header .back-btn{background:none;color:var(--text-secondary);font-size:1.4rem;padding:4px 8px;transition:color .2s}.chat-header .back-btn:hover{color:var(--text-primary)}.chat-header .pair-info{flex:1}.chat-header .pair-info .pair-label{font-size:.8rem;color:var(--text-secondary);text-transform:uppercase;letter-spacing:.5px}.chat-header .pair-info .pair-codes-display{font-family:Courier New,monospace;font-size:.85rem;color:var(--accent)}.chat-messages{flex:1;overflow-y:auto;padding:16px 20px;display:flex;flex-direction:column;gap:8px}.chat-messages .empty-state{flex:1;display:flex;align-items:center;justify-content:center;color:var(--text-secondary);font-size:.9rem;text-align:center;padding:40px}.message-bubble{max-width:78%;padding:10px 14px;border-radius:14px;font-size:.92rem;line-height:1.45;position:relative;animation:fadeIn .2s ease}@keyframes fadeIn{0%{opacity:0;transform:translateY(6px)}to{opacity:1;transform:translateY(0)}}.message-bubble.sent{align-self:flex-end;background:var(--accent);color:#fff;border-bottom-right-radius:4px}.message-bubble.received{align-self:flex-start;background:var(--bg-card);border:1px solid var(--border);border-bottom-left-radius:4px}.message-bubble .message-meta{display:flex;justify-content:flex-end;gap:6px;margin-top:4px;font-size:.7rem;opacity:.7}.chat-input-area{display:flex;gap:10px;padding:14px 20px;background:var(--bg-secondary);border-top:1px solid var(--border)}.chat-input-area .input-field{flex:1;border-radius:20px;padding:12px 18px}.chat-input-area .send-btn{width:46px;height:46px;border-radius:50%;background:var(--accent);color:#fff;font-size:1.2rem;display:flex;align-items:center;justify-content:center;transition:all .2s ease;flex-shrink:0}.chat-input-area .send-btn:hover{background:var(--accent-hover);transform:scale(1.05)}.chat-input-area .send-btn:disabled{opacity:.4;cursor:not-allowed;transform:none}.mailbox-page{flex:1;display:flex;flex-direction:column;align-items:center;padding:20px;max-width:480px;margin:0 auto;width:100%}.mailbox-hero{text-align:center;padding:40px 0 28px}.mailbox-hero .logo{font-size:3rem;margin-bottom:12px}.mailbox-hero h1{font-size:1.6rem;font-weight:700;letter-spacing:1px;margin-bottom:6px}.mailbox-hero p{color:var(--text-secondary);font-size:.9rem}.mailbox-input-group{width:100%;display:flex;flex-direction:column;gap:12px;margin-bottom:20px}.mailbox-actions{display:flex;gap:10px;width:100%}.mailbox-actions .btn{flex:1}.mailbox-result{width:100%;animation:fadeIn .3s ease}.mailbox-result .message-reveal{background:linear-gradient(135deg,#00d26a14,#0f346099);border:1px solid rgba(0,210,106,.25);border-radius:14px;padding:24px;margin-top:16px}.mailbox-result .message-reveal .reveal-label{font-size:.8rem;text-transform:uppercase;letter-spacing:1px;color:var(--success);margin-bottom:12px;font-weight:600}.mailbox-result .message-reveal .reveal-content{font-size:1.05rem;line-height:1.6;color:var(--text-primary);word-break:break-word;white-space:pre-wrap}.mailbox-result .message-reveal .reveal-footer{margin-top:16px;padding-top:12px;border-top:1px solid var(--border);font-size:.8rem;color:var(--text-secondary);display:flex;justify-content:space-between}.mailbox-status-card{width:100%;margin-top:16px;animation:fadeIn .3s ease}.mailbox-status-card .status-row{display:flex;justify-content:space-between;padding:8px 0;border-bottom:1px solid rgba(255,255,255,.05);font-size:.9rem}.mailbox-status-card .status-row:last-child{border-bottom:none}.mailbox-status-card .status-label{color:var(--text-secondary)}@media (max-width: 400px){.home-hero h1{font-size:1.5rem}.session-active-card .hat-code-display{font-size:1.4rem}.pair-item .pair-codes{font-size:.75rem}}*{margin:0;padding:0;box-sizing:border-box}:root{--bg-primary: #1a1a2e;--bg-secondary: #16213e;--bg-card: #0f3460;--text-primary: #ffffff;--text-secondary: #a0a0a0;--accent: #e94560;--accent-hover: #ff6b8a;--success: #00d26a;--warning: #ffc107;--error: #ff4757;--border: rgba(255, 255, 255, .1)}html,body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,sans-serif;background:var(--bg-primary);color:var(--text-primary);min-height:100vh;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}#root{min-height:100vh;display:flex;flex-direction:column}button{cursor:pointer;font-family:inherit;border:none;outline:none}input{font-family:inherit;outline:none}a{color:var(--accent);text-decoration:none}a:hover{text-decoration:underline}