:root{--primary-green: #2c4c3b;--dark-green: #1a2f24;--light-green: #3a5f4a;--gold: #d4af37;--bg-primary: #f8f6f1;--bg-secondary: #ffffff;--text-primary: #333333;--text-secondary: #666666;--text-muted: #999999;--border-color: #e8e8e8;--error-color: #dc3545;--success-color: #28a745}*{margin:0;padding:0;box-sizing:border-box}body{font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;background-color:var(--bg-primary);display:flex;justify-content:center;align-items:center;min-height:100vh;margin:0;padding:20px;transition:background-color .3s ease}.back-link{position:fixed;top:20px;left:20px;color:var(--primary-green);text-decoration:none;font-size:24px;padding:10px 12px;border-radius:50%;background-color:var(--bg-secondary);border:2px solid var(--border-color);transition:all .3s ease;z-index:1000;box-shadow:0 4px 15px #0000001a;display:flex;align-items:center;justify-content:center;width:48px;height:48px}.back-link:hover{background-color:var(--primary-green);color:#fff;border-color:var(--primary-green);transform:translateY(-2px);box-shadow:0 6px 20px #2c4c3b4d}.signup-container{background-color:var(--bg-secondary);border-radius:24px;padding:48px;box-shadow:0 20px 60px #0000001a;width:100%;max-width:480px;border:1px solid var(--border-color);position:relative}.logo{width:80px;height:80px;display:block;margin:0 auto 32px;border-radius:16px;object-fit:cover}h1{text-align:center;font-size:32px;font-weight:700;color:var(--text-primary);margin-bottom:12px;letter-spacing:-.5px}.subtitle{text-align:center;color:var(--text-secondary);font-size:16px;margin-bottom:32px;line-height:1.5}#signup-form{display:flex;flex-direction:column;gap:24px}.input-group{position:relative}.password-input-container{position:relative;display:flex;align-items:center}.password-input-container input{flex:1;padding-right:50px!important;font-family:inherit!important;letter-spacing:normal!important}.password-toggle{position:absolute;right:12px;top:50%;transform:translateY(-50%);background:none;border:none;cursor:pointer;padding:8px;border-radius:6px;transition:all .2s ease;color:var(--text-muted);z-index:10;display:flex;align-items:center;justify-content:center;width:36px;height:36px}.password-toggle:hover{background-color:var(--bg-primary);color:var(--text-secondary)}.password-toggle:focus{outline:none;box-shadow:0 0 0 2px #2c4c3b33}input[type=email],input[type=text],input[type=password]{width:100%;padding:16px 20px;border:2px solid var(--border-color);border-radius:12px;font-size:16px;font-family:inherit;background-color:var(--bg-primary);color:var(--text-primary);transition:all .3s ease;outline:none;-webkit-appearance:none;-moz-appearance:none;appearance:none;box-sizing:border-box}input[type=password]{font-family:inherit!important}input[type=email]:focus,input[type=text]:focus,input[type=password]:focus{border-color:var(--primary-green);background-color:var(--bg-secondary);box-shadow:0 0 0 3px #2c4c3b1a}input.invalid{border-color:var(--error-color);background-color:#fef2f2}input.valid{border-color:var(--success-color);background-color:#f0fdf4}.validation-message{margin-top:8px;font-size:14px;min-height:20px}.validation-message.error{color:var(--error-color)}.validation-message.success{color:var(--success-color)}.character-count{font-size:12px;color:var(--text-muted);text-align:right;margin-top:4px;font-family:monospace}.character-count.warning{color:var(--gold)}.character-count.danger{color:var(--error-color)}.password-requirements{margin-top:12px;padding:16px;background-color:var(--bg-primary);border-radius:8px;border:1px solid var(--border-color)}.password-requirements p{font-size:14px;font-weight:600;color:var(--text-secondary);margin-bottom:8px}.password-requirements ul{list-style:none;margin:0;padding:0}.password-requirements li{font-size:13px;color:var(--text-muted);margin-bottom:4px;padding-left:20px;position:relative}.password-requirements li:before{content:"✗";position:absolute;left:0;color:var(--error-color);font-weight:700}.password-requirements li.valid:before{content:"✓";color:var(--success-color)}.password-requirements li.valid{color:var(--success-color)}.signup-btn{width:100%;padding:18px 24px;background:var(--primary-green);color:#fff;border:none;border-radius:12px;font-size:16px;font-weight:600;cursor:pointer;transition:all .3s ease;position:relative;overflow:hidden;margin-top:8px}.signup-btn:hover:not(:disabled){background:var(--dark-green);transform:translateY(-2px);box-shadow:0 8px 25px #2c4c3b4d}.signup-btn:disabled{background:var(--text-muted);cursor:not-allowed;transform:none;box-shadow:none}.btn-loading,.signup-btn.loading .btn-text{display:none}.signup-btn.loading .btn-loading{display:inline}.login-link{text-align:center;margin-top:24px;font-size:14px;color:var(--text-secondary)}.login-link a{color:var(--primary-green);text-decoration:none;font-weight:600}.login-link a:hover{text-decoration:underline}@media (max-width: 768px){.back-link{top:15px;left:15px;width:52px;height:52px;font-size:26px}.signup-container{padding:32px 24px;margin:20px;max-width:none}h1{font-size:28px}.subtitle{font-size:15px}}@media (max-width: 480px){body{padding:10px}.back-link{top:10px;left:10px}.signup-container{padding:24px 20px;margin:10px}.logo{width:60px;height:60px;margin-bottom:24px}h1{font-size:24px}input[type=email],input[type=text],input[type=password]{padding:14px 16px;font-size:16px}}